for security reasons, one cannot change the tag of a udata

from Lua.

auxlib.c

@@ -0,0 +1,81 @@
+char *rcs_auxlib="$Id: auxlib.c,v 1.4 1997/04/07 14:48:53 roberto Exp roberto $";
+
+#include <stdio.h>
+#include <stdarg.h>
+#include <string.h>
+
+#include "lua.h"
+#include "auxlib.h"
+#include "luadebug.h"
+
+
+
+int luaI_findstring (char *name, char *list[])
+{
+  int i;
+  for (i=0; list[i]; i++)
+    if (strcmp(list[i], name) == 0)
+      return i;
+  return -1;  /* name not found */
+}
+
+
+void luaL_arg_check(int cond, int numarg, char *extramsg)
+{
+  if (!cond) {
+    char *funcname;
+    lua_getobjname(lua_stackedfunction(0), &funcname);
+    if (funcname == NULL)
+      funcname = "???";
+    if (extramsg == NULL)
+      luaL_verror("bad argument #%d to function `%s'", numarg, funcname);
+    else
+      luaL_verror("bad argument #%d to function `%s' (%s)",
+                      numarg, funcname, extramsg);
+  }
+}
+
+char *luaL_check_string (int numArg)
+{
+  lua_Object o = lua_getparam(numArg);
+  luaL_arg_check(lua_isstring(o), numArg, "string expected");
+  return lua_getstring(o);
+}
+
+char *luaL_opt_string (int numArg, char *def)
+{
+  return (lua_getparam(numArg) == LUA_NOOBJECT) ? def :
+                              luaL_check_string(numArg);
+}
+
+double luaL_check_number (int numArg)
+{
+  lua_Object o = lua_getparam(numArg);
+  luaL_arg_check(lua_isnumber(o), numArg, "number expected");
+  return lua_getnumber(o);
+}
+
+
+double luaL_opt_number (int numArg, double def)
+{
+  return (lua_getparam(numArg) == LUA_NOOBJECT) ? def :
+                              luaL_check_number(numArg);
+}
+
+void luaL_openlib (struct luaL_reg *l, int n)
+{
+  int i;
+  for (i=0; i<n; i++)
+    lua_register(l[i].name, l[i].func);
+}
+
+
+void luaL_verror (char *fmt, ...)
+{
+  char buff[1000];
+  va_list argp;
+  va_start(argp, fmt);
+  vsprintf(buff, fmt, argp);
+  va_end(argp);
+  lua_error(buff);
+}

auxlib.h

@@ -0,0 +1,30 @@
+/*
+** $Id: auxlib.h,v 1.2 1997/04/06 14:08:08 roberto Exp roberto $
+*/
+
+#ifndef auxlib_h
+#define auxlib_h
+
+#include "lua.h"
+
+struct luaL_reg {
+  char *name;
+  lua_CFunction func;
+};
+
+void luaL_openlib (struct luaL_reg *l, int n);
+void luaL_arg_check(int cond, int numarg, char *extramsg);
+char *luaL_check_string (int numArg);
+char *luaL_opt_string (int numArg, char *def);
+double luaL_check_number (int numArg);
+double luaL_opt_number (int numArg, double def);
+void luaL_verror (char *fmt, ...);
+
+
+
+/* -- private part (only for Lua modules */
+
+int luaI_findstring (char *name, char *list[]);
+
+
+#endif

fallback.c

@@ -3,67 +3,285 @@
 ** TecCGraf - PUC-Rio
 */
  
-char *rcs_fallback="$Id: fallback.c,v 1.18 1996/01/30 15:25:23 roberto Exp roberto $";
+char *rcs_fallback="$Id: fallback.c,v 2.8 1997/06/17 17:27:07 roberto Exp roberto $";
 
 #include <stdio.h>
 #include <string.h>
  
-#include "mem.h"
+#include "auxlib.h"
+#include "luamem.h"
 #include "fallback.h"
 #include "opcode.h"
 #include "lua.h"
+#include "table.h"
+#include "tree.h"
+#include "hash.h"
 
 
-static void errorFB (void);
-static void indexFB (void);
-static void gettableFB (void);
-static void arithFB (void);
-static void concatFB (void);
-static void orderFB (void);
-static void GDFB (void);
-static void funcFB (void);
+
+/* -------------------------------------------
+** Reference routines
+*/
+
+static struct ref {
+  TObject o;
+  enum {LOCK, HOLD, FREE, COLLECTED} status;
+} *refArray = NULL;
+static int refSize = 0;
+
+int luaI_ref (TObject *object, int lock)
+{
+  int i;
+  int oldSize;
+  if (ttype(object) == LUA_T_NIL)
+    return -1;   /* special ref for nil */
+  for (i=0; i<refSize; i++)
+    if (refArray[i].status == FREE)
+      goto found;
+  /* no more empty spaces */
+  oldSize = refSize;
+  refSize = growvector(&refArray, refSize, struct ref, refEM, MAX_WORD);
+  for (i=oldSize; i<refSize; i++)
+    refArray[i].status = FREE;
+  i = oldSize;
+ found:
+  refArray[i].o = *object;
+  refArray[i].status = lock ? LOCK : HOLD;
+  return i;
+}
+
+
+void lua_unref (int ref)
+{
+  if (ref >= 0 && ref < refSize)
+    refArray[ref].status = FREE;
+}
+
+
+TObject *luaI_getref (int ref)
+{
+  static TObject nul = {LUA_T_NIL, {0}};
+  if (ref == -1)
+    return &nul;
+  if (ref >= 0 && ref < refSize &&
+      (refArray[ref].status == LOCK || refArray[ref].status == HOLD))
+    return &refArray[ref].o;
+  else
+    return NULL;
+}
+
+
+void luaI_travlock (int (*fn)(TObject *))
+{
+  int i;
+  for (i=0; i<refSize; i++)
+    if (refArray[i].status == LOCK)
+      fn(&refArray[i].o);
+}
+
+
+void luaI_invalidaterefs (void)
+{
+  int i;
+  for (i=0; i<refSize; i++)
+    if (refArray[i].status == HOLD && !luaI_ismarked(&refArray[i].o))
+      refArray[i].status = COLLECTED;
+}
+
+
+/* -------------------------------------------
+* Internal Methods 
+*/
+
+char *luaI_eventname[] = {  /* ORDER IM */
+  "gettable", "settable", "index", "getglobal", "setglobal", "add",
+  "sub", "mul", "div", "pow", "unm", "lt", "le", "gt", "ge",
+  "concat", "gc", "function",
+  NULL
+};
+
+
+
+static int luaI_checkevent (char *name, char *list[])
+{
+  int e = luaI_findstring(name, list);
+  if (e < 0)
+    luaL_verror("`%s' is not a valid event name", name);
+  return e;
+}
+
+
+struct IM *luaI_IMtable = NULL;
+
+static int IMtable_size = 0;
+static int last_tag = LUA_T_NIL;  /* ORDER LUA_T */
+
+
+/* events in LUA_T_LINE are all allowed, since this is used as a
+*  'placeholder' for "default" fallbacks
+*/
+static char validevents[NUM_TYPES][IM_N] = { /* ORDER LUA_T, ORDER IM */
+{1, 1, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1},  /* LUA_T_USERDATA */
+{1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1},  /* LUA_T_LINE */
+{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0},  /* LUA_T_CMARK */
+{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0},  /* LUA_T_MARK */
+{1, 1, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0},  /* LUA_T_CFUNCTION */
+{1, 1, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0},  /* LUA_T_FUNCTION */
+{0, 0, 1, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1},  /* LUA_T_ARRAY */
+{1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1},  /* LUA_T_STRING */
+{1, 1, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 1},  /* LUA_T_NUMBER */
+{1, 1, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1}   /* LUA_T_NIL */
+};
+
+static int validevent (lua_Type t, int e)
+{ /* ORDER LUA_T */
+  return (t < LUA_T_NIL) ?  1 : validevents[-t][e];
+}
+
+
+static void init_entry (int tag)
+{
+  int i;
+  for (i=0; i<IM_N; i++)
+    ttype(luaI_getim(tag, i)) = LUA_T_NIL;
+}
+
+void luaI_initfallbacks (void)
+{
+  if (luaI_IMtable == NULL) {
+    int i;
+    IMtable_size = NUM_TYPES+10;
+    luaI_IMtable = newvector(IMtable_size, struct IM);
+    for (i=LUA_T_NIL; i<=LUA_T_USERDATA; i++)
+      init_entry(i);
+  }
+}
+
+int lua_newtag (void)
+{
+  --last_tag;
+  if ((-last_tag) >= IMtable_size) {
+    luaI_initfallbacks();
+    IMtable_size = growvector(&luaI_IMtable, IMtable_size,
+                              struct IM, memEM, MAX_INT);
+  }
+  init_entry(last_tag);
+  return last_tag;
+}
+
+
+static void checktag (int tag)
+{
+  if (!(last_tag <= tag && tag <= 0))
+    luaL_verror("%d is not a valid tag", tag);
+}
+
+void luaI_realtag (int tag)
+{
+  if (!(last_tag <= tag && tag < LUA_T_NIL))
+    luaL_verror("tag %d is not result of `newtag'", tag);
+}
+
+
+void luaI_settag (int tag, TObject *o)
+{
+  luaI_realtag(tag);
+  switch (ttype(o)) {
+    case LUA_T_ARRAY:
+      o->value.a->htag = tag;
+      break;
+    case LUA_T_USERDATA:
+      o->value.ts->tag = tag;
+      break;
+    default:
+      luaL_verror("cannot change the tag of a %s", luaI_typenames[-ttype(o)]);
+  }
+}
+
+
+int luaI_efectivetag (TObject *o)
+{
+  lua_Type t = ttype(o);
+  if (t == LUA_T_USERDATA) {
+    int tag = o->value.ts->tag;
+    return (tag >= 0) ? LUA_T_USERDATA : tag;
+  }
+  else if (t == LUA_T_ARRAY)
+    return o->value.a->htag;
+  else return t;
+}
+
+
+void luaI_gettagmethod (void)
+{
+  int t = (int)luaL_check_number(1);
+  int e = luaI_checkevent(luaL_check_string(2), luaI_eventname);
+  checktag(t);
+  if (validevent(t, e))
+    luaI_pushobject(luaI_getim(t,e));
+}
+
+
+void luaI_settagmethod (void)
+{
+  int t = (int)luaL_check_number(1);
+  int e = luaI_checkevent(luaL_check_string(2), luaI_eventname);
+  lua_Object func = lua_getparam(3);
+  checktag(t);
+  if (!validevent(t, e))
+    luaL_verror("cannot change internal method `%s' for tag %d",
+                luaI_eventname[e], t);
+  luaL_arg_check(lua_isnil(func) || lua_isfunction(func),
+                 3, "function expected");
+  luaI_pushobject(luaI_getim(t,e));
+  *luaI_getim(t, e) = *luaI_Address(func);
+}
+
+
+static void stderrorim (void)
+{
+  lua_Object s = lua_getparam(1);
+  if (lua_isstring(s))
+    fprintf(stderr, "lua: %s\n", lua_getstring(s));
+}
+
+static TObject errorim = {LUA_T_CFUNCTION, {stderrorim}};
+
+
+TObject *luaI_geterrorim (void)
+{
+  return &errorim;
+}
+
+void luaI_seterrormethod (void)
+{
+  lua_Object func = lua_getparam(1);
+  luaL_arg_check(lua_isnil(func) || lua_isfunction(func),
+                 1, "function expected");
+  luaI_pushobject(&errorim);
+  errorim = *luaI_Address(func);
+}
+
+char *luaI_travfallbacks (int (*fn)(TObject *))
+{
+  int e;
+  if (fn(&errorim))
+    return "error";
+  for (e=IM_GETTABLE; e<=IM_FUNCTION; e++) {  /* ORDER IM */
+    int t;
+    for (t=0; t>=last_tag; t--)
+      if (fn(luaI_getim(t,e)))
+        return luaI_eventname[e];
+  }
+  return NULL;
+}
 
 
 /*
-** Warning: This list must be in the same order as the #define's
+* ===================================================================
+* compatibility with old fallback system
 */
-struct FB  luaI_fallBacks[] = {
-{"error", {LUA_T_CFUNCTION, {errorFB}}, 1, 0},
-{"index", {LUA_T_CFUNCTION, {indexFB}}, 2, 1},
-{"gettable", {LUA_T_CFUNCTION, {gettableFB}}, 2, 1},
-{"arith", {LUA_T_CFUNCTION, {arithFB}}, 3, 1},
-{"order", {LUA_T_CFUNCTION, {orderFB}}, 3, 1},
-{"concat", {LUA_T_CFUNCTION, {concatFB}}, 2, 1},
-{"settable", {LUA_T_CFUNCTION, {gettableFB}}, 3, 0},
-{"gc", {LUA_T_CFUNCTION, {GDFB}}, 1, 0},
-{"function", {LUA_T_CFUNCTION, {funcFB}}, -1, -1},
-                                /* no fixed number of params or results */
-{"getglobal", {LUA_T_CFUNCTION, {indexFB}}, 1, 1}
-                                /* same default behavior of index FB */
-};
-
-#define N_FB  (sizeof(luaI_fallBacks)/sizeof(struct FB))
-
-void luaI_setfallback (void)
-{
-  int i;
-  char *name = lua_getstring(lua_getparam(1));
-  lua_Object func = lua_getparam(2);
-  if (name == NULL || !(lua_isfunction(func) || lua_iscfunction(func)))
-    lua_error("incorrect argument to function `setfallback'");
-  for (i=0; i<N_FB; i++)
-  {
-    if (strcmp(luaI_fallBacks[i].kind, name) == 0)
-    {
-      luaI_pushobject(&luaI_fallBacks[i].function);
-      luaI_fallBacks[i].function = *luaI_Address(func);
-      return;
-    }
-  }
-  /* name not found */
-  lua_error("incorrect argument to function `setfallback'");
-}
-
+#if	LUA_COMPAT2_5
 
 static void errorFB (void)
 {
@@ -75,110 +293,76 @@ static void errorFB (void)
 }
  
 
-static void indexFB (void)
-{
-  lua_pushnil();
-}
+static void nilFB (void) { }
  
 
-static void gettableFB (void)
+static void typeFB (void)
 {
-  lua_error("indexed expression not a table");
-}
- 
-
-static void arithFB (void)
-{
-  lua_error("unexpected type at conversion to number");
-}
-
-static void concatFB (void)
-{
-  lua_error("unexpected type at conversion to string");
+  lua_error("unexpected type");
 }
 
 
-static void orderFB (void)
+static void fillvalids (IMS e, TObject *func)
 {
-  lua_error("unexpected type at comparison");
-}
-
-static void GDFB (void) { }
-
-static void funcFB (void)
-{
-  lua_error("call expression not a function");
+  int t;
+  for (t=LUA_T_NIL; t<=LUA_T_USERDATA; t++)
+    if (validevent(t, e))
+      *luaI_getim(t, e) = *func;
 }
 
 
-/*
-** Lock routines
-*/
-
-static Object *lockArray = NULL;
-static Word lockSize = 0;
-
-int luaI_lock (Object *object)
+void luaI_setfallback (void)
 {
-  Word i;
-  Word oldSize;
-  if (tag(object) == LUA_T_NIL)
-    return -1;   /* special lock ref for nil */
-  for (i=0; i<lockSize; i++)
-    if (tag(&lockArray[i]) == LUA_T_NIL)
-    {
-      lockArray[i] = *object;
-      return i;
+  static char *oldnames [] = {"error", "getglobal", "arith", "order", NULL};
+  TObject oldfunc;
+  lua_CFunction replace;
+  char *name = luaL_check_string(1);
+  lua_Object func = lua_getparam(2);
+  luaI_initfallbacks();
+  luaL_arg_check(lua_isfunction(func), 2, "function expected");
+  switch (luaI_findstring(name, oldnames)) {
+    case 0:  /* old error fallback */
+      oldfunc = errorim;
+      errorim = *luaI_Address(func);
+      replace = errorFB;
+      break;
+    case 1:  /* old getglobal fallback */
+      oldfunc = *luaI_getim(LUA_T_NIL, IM_GETGLOBAL);
+      *luaI_getim(LUA_T_NIL, IM_GETGLOBAL) = *luaI_Address(func);
+      replace = nilFB;
+      break;
+    case 2: {  /* old arith fallback */
+      int i;
+      oldfunc = *luaI_getim(LUA_T_NUMBER, IM_POW);
+      for (i=IM_ADD; i<=IM_UNM; i++)  /* ORDER IM */
+        fillvalids(i, luaI_Address(func));
+      replace = typeFB;
+      break;
+    }
+    case 3: {  /* old order fallback */
+      int i;
+      oldfunc = *luaI_getim(LUA_T_LINE, IM_LT);
+      for (i=IM_LT; i<=IM_GE; i++)  /* ORDER IM */
+        fillvalids(i, luaI_Address(func));
+      replace = typeFB;
+      break;
+    }
+    default: {
+      int e;
+      if ((e = luaI_findstring(name, luaI_eventname)) >= 0) {
+        oldfunc = *luaI_getim(LUA_T_LINE, e);
+        fillvalids(e, luaI_Address(func));
+        replace = (e == IM_GC || e == IM_INDEX) ? nilFB : typeFB;
+      }
+      else {
+        luaL_verror("`%s' is not a valid fallback name", name);
+        replace = NULL;  /* to avoid warnings */
+      }
     }
-  /* no more empty spaces */
-  oldSize = lockSize;
-  if (lockArray == NULL)
-  {
-    lockSize = 10;
-    lockArray = newvector(lockSize, Object);
   }
+  if (oldfunc.ttype != LUA_T_NIL)
+    luaI_pushobject(&oldfunc);
   else
-  {
-    lockSize = 3*oldSize/2 + 5;
-    lockArray = growvector(lockArray, lockSize, Object);
-  }
-  for (i=oldSize; i<lockSize; i++)
-    tag(&lockArray[i]) = LUA_T_NIL;
-  lockArray[oldSize] = *object;
-  return oldSize;
-}
-
-
-void lua_unlock (int ref)
-{
-  if (ref >= 0 && ref < lockSize)
-    tag(&lockArray[ref]) = LUA_T_NIL;
-}
-
-
-Object *luaI_getlocked (int ref)
-{
-  static Object nul = {LUA_T_NIL, {0}};
-  if (ref >= 0 && ref < lockSize)
-    return &lockArray[ref];
-  else
-    return &nul;
-}
-
-
-void luaI_travlock (int (*fn)(Object *))
-{
-  Word i;
-  for (i=0; i<lockSize; i++)
-    fn(&lockArray[i]);
-}
-
-
-char *luaI_travfallbacks (int (*fn)(Object *))
-{
-  Word i;
-  for (i=0; i<N_FB; i++)
-    if (fn(&luaI_fallBacks[i].function))
-      return luaI_fallBacks[i].kind;
-  return NULL;
+    lua_pushcfunction(replace);
 }
+#endif 

fallback.h

@@ -1,35 +1,65 @@
 /*
-** $Id: fallback.h,v 1.10 1995/10/17 11:52:38 roberto Exp roberto $
+** $Id: fallback.h,v 1.22 1997/04/04 22:24:51 roberto Exp roberto $
 */
  
 #ifndef fallback_h
 #define fallback_h
 
+#include "lua.h"
 #include "opcode.h"
 
-extern struct FB {
-  char *kind;
-  Object function;
-  int nParams;
-  int nResults;
-} luaI_fallBacks[];
+/*
+* WARNING: if you change the order of this enumeration,
+* grep "ORDER IM"
+*/
+typedef enum {
+  IM_GETTABLE = 0,
+  IM_SETTABLE,
+  IM_INDEX,
+  IM_GETGLOBAL,
+  IM_SETGLOBAL,
+  IM_ADD,
+  IM_SUB,
+  IM_MUL,
+  IM_DIV,
+  IM_POW,
+  IM_UNM,
+  IM_LT,
+  IM_LE,
+  IM_GT,
+  IM_GE,
+  IM_CONCAT,
+  IM_GC,
+  IM_FUNCTION
+} IMS;
 
-#define FB_ERROR  0
-#define FB_INDEX  1
-#define FB_GETTABLE  2
-#define FB_ARITH  3
-#define FB_ORDER  4
-#define FB_CONCAT  5
-#define FB_SETTABLE  6
-#define FB_GC 7
-#define FB_FUNCTION 8
-#define FB_GETGLOBAL 9
+#define IM_N 18
+
+
+extern struct IM {
+  TObject int_method[IM_N];
+} *luaI_IMtable;
+
+extern char *luaI_eventname[];
+
+#define luaI_getim(tag,event) (&luaI_IMtable[-(tag)].int_method[event])
+#define luaI_getimbyObj(o,e)  (luaI_getim(luaI_efectivetag(o),(e)))
 
 void luaI_setfallback (void);
-int luaI_lock (Object *object);
-Object *luaI_getlocked (int ref);
-void luaI_travlock (int (*fn)(Object *));
-char *luaI_travfallbacks (int (*fn)(Object *));
+int luaI_ref (TObject *object, int lock);
+TObject *luaI_getref (int ref);
+void luaI_travlock (int (*fn)(TObject *));
+void luaI_invalidaterefs (void);
+char *luaI_travfallbacks (int (*fn)(TObject *));
+
+void luaI_settag (int tag, TObject *o);
+void luaI_realtag (int tag);
+TObject *luaI_geterrorim (void);
+int luaI_efectivetag (TObject *o);
+void luaI_settagmethod (void);
+void luaI_gettagmethod (void);
+void luaI_seterrormethod (void);
+void luaI_initfallbacks (void);
 
 #endif
 

func.c

@@ -1,12 +1,12 @@
-#include <stdio.h>
+#include <string.h>
 
 #include "luadebug.h"
 #include "table.h"
-#include "mem.h"
+#include "luamem.h"
 #include "func.h"
 #include "opcode.h"
+#include "inout.h"
 
-#define LOCALVARINITSIZE 10
 
 static TFunc *function_root = NULL;
 static LocVar *currvars = NULL;
@@ -19,8 +19,12 @@ static int maxcurrvars = 0;
 */
 void luaI_initTFunc (TFunc *f)
 {
+  f->next = NULL;
+  f->marked = 0;
+  f->size = 0;
   f->code = NULL;
   f->lineDefined = 0;
+  f->fileName = lua_parsedfile;
   f->locvars = NULL;
 }
 
@@ -39,55 +43,63 @@ void luaI_insertfunction (TFunc *f)
 /*
 ** Free function
 */
-static void freefunc (TFunc *f)
+void luaI_freefunc (TFunc *f)
 {
   luaI_free (f->code);
-  if (f->locvars)
-    luaI_free (f->locvars);
+  luaI_free (f->locvars);
   luaI_free (f);
 }
 
+
+void luaI_funcfree (TFunc *l)
+{
+  while (l) {
+    TFunc *next = l->next;
+    luaI_freefunc(l);
+    l = next;
+  }
+}
+
 /*
 ** Garbage collection function.
-** This function traverse the function list freeing unindexed functions
 */
-Long luaI_funccollector (void)
+TFunc *luaI_funccollector (long *acum)
 {
   TFunc *curr = function_root;
   TFunc *prev = NULL;
-  Long counter = 0;
-  while (curr)
-  {
+  TFunc *frees = NULL;
+  long counter = 0;
+  while (curr) {
     TFunc *next = curr->next;
-    if (!curr->marked)
-    {
+    if (!curr->marked) {
       if (prev == NULL)
         function_root = next;
       else
         prev->next = next;
-      freefunc (curr);
+      curr->next = frees;
+      frees = curr;
       ++counter;
     }
-    else
-    {
+    else {
       curr->marked = 0;
       prev = curr;
     } 
     curr = next;
   }
-  return counter;
+  *acum += counter;
+  return frees;
 }
 
 
 void lua_funcinfo (lua_Object func, char **filename, int *linedefined)
 {
-  Object *f = luaI_Address(func);
-  if (f->tag == LUA_T_MARK || f->tag == LUA_T_FUNCTION)
+  TObject *f = luaI_Address(func);
+  if (f->ttype == LUA_T_MARK || f->ttype == LUA_T_FUNCTION)
   {
     *filename = f->value.tf->fileName;
     *linedefined = f->value.tf->lineDefined;
   }
-  else if (f->tag == LUA_T_CMARK || f->tag == LUA_T_CFUNCTION)
+  else if (f->ttype == LUA_T_CMARK || f->ttype == LUA_T_CFUNCTION)
   {
     *filename = "(C)";
     *linedefined = -1;
@@ -100,16 +112,7 @@ void lua_funcinfo (lua_Object func, char **filename, int *linedefined)
 void luaI_registerlocalvar (TaggedString *varname, int line)
 {
   if (numcurrvars >= maxcurrvars)
-    if (currvars == NULL)
-    {
-      maxcurrvars = LOCALVARINITSIZE;
-      currvars = newvector (maxcurrvars, LocVar);
-    }
-    else
-    {
-      maxcurrvars *= 2;
-      currvars = growvector (currvars, maxcurrvars, LocVar);
-    }
+    maxcurrvars = growvector(&currvars, maxcurrvars, LocVar, "", MAX_WORD);
   currvars[numcurrvars].varname = varname;
   currvars[numcurrvars].line = line;
   numcurrvars++;

func.h

@@ -1,8 +1,13 @@
+/*
+** $Id: func.h,v 1.8 1996/03/14 15:54:20 roberto Exp roberto $
+*/
+
 #ifndef func_h
 #define func_h
 
 #include "types.h"
 #include "lua.h"
+#include "tree.h"
 
 typedef struct LocVar
 {
@@ -17,7 +22,7 @@ typedef struct LocVar
 typedef struct TFunc
 {
   struct TFunc	*next;
-  char		marked;
+  int		marked;
   int		size;
   Byte		*code;
   int		lineDefined;
@@ -25,10 +30,12 @@ typedef struct TFunc
   LocVar        *locvars;
 } TFunc;
 
-Long luaI_funccollector (void);
+TFunc *luaI_funccollector (long *cont);
+void luaI_funcfree (TFunc *l);
 void luaI_insertfunction (TFunc *f);
 
 void luaI_initTFunc (TFunc *f);
+void luaI_freefunc (TFunc *f);
 
 void luaI_registerlocalvar (TaggedString *varname, int line);
 void luaI_unregisterlocalvar (int line);

hash.c

@@ -3,14 +3,15 @@
 ** hash manager for lua
 */
 
-char *rcs_hash="$Id: hash.c,v 2.28 1996/02/12 18:32:40 roberto Exp roberto $";
+char *rcs_hash="$Id: hash.c,v 2.42 1997/05/08 20:43:30 roberto Exp roberto $";
 
 
-#include "mem.h"
+#include "luamem.h"
 #include "opcode.h"
 #include "hash.h"
 #include "table.h"
 #include "lua.h"
+#include "auxlib.h"
 
 
 #define nhash(t)	((t)->nhash)
@@ -24,19 +25,22 @@ char *rcs_hash="$Id: hash.c,v 2.28 1996/02/12 18:32:40 roberto Exp roberto $";
 
 #define REHASH_LIMIT    0.70    /* avoid more than this % full */
 
+#define TagDefault LUA_T_ARRAY;
+
 
 static Hash *listhead = NULL;
 
 
 /* hash dimensions values */
-static Word dimensions[] = 
- {3, 5, 7, 11, 23, 47, 97, 197, 397, 797, 1597, 3203, 6421,
-  12853, 25717, 51437, 65521, 0};  /* 65521 == last prime < MAX_WORD */
+static Long dimensions[] = 
+ {5L, 11L, 23L, 47L, 97L, 197L, 397L, 797L, 1597L, 3203L, 6421L,
+  12853L, 25717L, 51437L, 102811L, 205619L, 411233L, 822433L,
+  1644817L, 3289613L, 6579211L, 13158023L, MAX_INT};
 
-Word luaI_redimension (Word nhash)
+int luaI_redimension (int nhash)
 {
- Word i;
- for (i=0; dimensions[i]!=0; i++)
+ int i;
+ for (i=0; dimensions[i]<MAX_INT; i++)
  {
   if (dimensions[i] > nhash)
    return dimensions[i];
@@ -45,79 +49,89 @@ Word luaI_redimension (Word nhash)
  return 0;  /* to avoid warnings */
 }
 
-static Word hashindex (Hash *t, Object *ref)		/* hash function */
-{
- switch (tag(ref))
- {
-  case LUA_T_NIL:
-   lua_error ("unexpected type to index table");
-   return -1;  /* UNREACHEABLE */
-  case LUA_T_NUMBER:
-   return (((Word)nvalue(ref))%nhash(t));
-  case LUA_T_STRING:
-   return (Word)((tsvalue(ref)->hash)%nhash(t));  /* make it a valid index */
-  case LUA_T_FUNCTION:
-   return (((IntPoint)ref->value.tf)%nhash(t));
-  case LUA_T_CFUNCTION:
-   return (((IntPoint)fvalue(ref))%nhash(t));
-  case LUA_T_ARRAY:
-   return (((IntPoint)avalue(ref))%nhash(t));
-  default:  /* user data */
-   return (((IntPoint)uvalue(ref))%nhash(t));
- }
-}
 
-int lua_equalObj (Object *t1, Object *t2)
+int lua_equalObj (TObject *t1, TObject *t2)
 {
-  if (tag(t1) != tag(t2)) return 0;
-  switch (tag(t1))
+  if (ttype(t1) != ttype(t2)) return 0;
+  switch (ttype(t1))
   {
     case LUA_T_NIL: return 1;
     case LUA_T_NUMBER: return nvalue(t1) == nvalue(t2);
-    case LUA_T_STRING: return svalue(t1) == svalue(t2);
+    case LUA_T_STRING: case LUA_T_USERDATA: return svalue(t1) == svalue(t2);
     case LUA_T_ARRAY: return avalue(t1) == avalue(t2);
     case LUA_T_FUNCTION: return t1->value.tf == t2->value.tf;
     case LUA_T_CFUNCTION: return fvalue(t1) == fvalue(t2);
-    default: return uvalue(t1) == uvalue(t2);
+    default:
+     lua_error("internal error in `lua_equalObj'");
+     return 0; /* UNREACHEABLE */
   }
 }
 
-static Word present (Hash *t, Object *ref)
-{ 
- Word h = hashindex(t, ref);
- while (tag(ref(node(t, h))) != LUA_T_NIL)
- {
-  if (lua_equalObj(ref, ref(node(t, h))))
-    return h;
-  h = (h+1) % nhash(t);
- }
- return h;
+
+static long int hashindex (TObject *ref)
+{
+  long int h;
+  switch (ttype(ref)) {
+    case LUA_T_NUMBER:
+      h = (long int)nvalue(ref); break;
+    case LUA_T_STRING: case LUA_T_USERDATA:
+      h = tsvalue(ref)->hash; break;
+    case LUA_T_FUNCTION:
+      h = (IntPoint)ref->value.tf; break;
+    case LUA_T_CFUNCTION:
+      h = (IntPoint)fvalue(ref); break;
+    case LUA_T_ARRAY:
+      h = (IntPoint)avalue(ref); break;
+    default:
+      lua_error ("unexpected type to index table");
+      h = 0;  /* UNREACHEABLE */
+  }
+  if (h < 0) h = -h;
+  return h;
+}
+
+
+static int present (Hash *t, TObject *key)
+{
+  long int h = hashindex(key);
+  int tsize = nhash(t);
+  int h1 = h%tsize;
+  TObject *rf = ref(node(t, h1));
+  if (ttype(rf) != LUA_T_NIL && !lua_equalObj(key, rf)) {
+    int h2 = h%(tsize-2) + 1;
+    do {
+      h1 = (h1+h2)%tsize;
+      rf = ref(node(t, h1));
+    } while (ttype(rf) != LUA_T_NIL && !lua_equalObj(key, rf));
+  }
+  return h1;
 }
 
 
 /*
 ** Alloc a vector node 
 */
-static Node *hashnodecreate (Word nhash)
+static Node *hashnodecreate (int nhash)
 {
- Word i;
+ int i;
  Node *v = newvector (nhash, Node);
  for (i=0; i<nhash; i++)
-   tag(ref(&v[i])) = LUA_T_NIL;
+   ttype(ref(&v[i])) = LUA_T_NIL;
  return v;
 }
 
 /*
 ** Create a new hash. Return the hash pointer or NULL on error.
 */
-static Hash *hashcreate (Word nhash)
+static Hash *hashcreate (int nhash)
 {
  Hash *t = new(Hash);
- nhash = luaI_redimension((Word)((float)nhash/REHASH_LIMIT));
+ nhash = luaI_redimension((int)((float)nhash/REHASH_LIMIT));
  nodevector(t) = hashnodecreate(nhash);
  nhash(t) = nhash;
  nuse(t) = 0;
  markarray(t) = 0;
+ t->htag = TagDefault;
  return t;
 }
 
@@ -138,12 +152,12 @@ void lua_hashmark (Hash *h)
 {
  if (markarray(h) == 0)
  {
-  Word i;
+  int i;
   markarray(h) = 1;
   for (i=0; i<nhash(h); i++)
   {
    Node *n = node(h,i);
-   if (tag(ref(n)) != LUA_T_NIL)
+   if (ttype(ref(n)) != LUA_T_NIL)
    {
     lua_markobject(&n->ref);
     lua_markobject(&n->val);
@@ -153,49 +167,50 @@ void lua_hashmark (Hash *h)
 }
 
 
-static void call_fallbacks (void)
+void luaI_hashcallIM (Hash *l)
 {
-  Hash *curr_array;
-  Object t;
-  tag(&t) = LUA_T_ARRAY;
-  for (curr_array = listhead; curr_array; curr_array = curr_array->next)
-    if (markarray(curr_array) != 1)
-    {
-      avalue(&t) = curr_array;
-      luaI_gcFB(&t);
-    }
-  tag(&t) = LUA_T_NIL;
-  luaI_gcFB(&t);  /* end of list */
+  TObject t;
+  ttype(&t) = LUA_T_ARRAY;
+  for (; l; l=l->next) {
+    avalue(&t) = l;
+    luaI_gcIM(&t);
+  }
+}
+
+
+void luaI_hashfree (Hash *frees)
+{
+  while (frees) {
+    Hash *next = frees->next;
+    hashdelete(frees);
+    frees = next;
+  }
 }
 
  
-/*
-** Garbage collection to arrays
-** Delete all unmarked arrays.
-*/
-Long lua_hashcollector (void)
+Hash *luaI_hashcollector (long *acum)
 {
- Hash *curr_array = listhead, *prev = NULL;
- Long counter = 0;
- call_fallbacks();
- while (curr_array != NULL)
- {
-  Hash *next = curr_array->next;
-  if (markarray(curr_array) != 1)
-  {
-   if (prev == NULL) listhead = next;
-   else              prev->next = next;
-   hashdelete(curr_array);
-   ++counter;
+  Hash *curr_array = listhead, *prev = NULL, *frees = NULL;
+  long counter = 0;
+  while (curr_array != NULL) {
+    Hash *next = curr_array->next;
+    if (markarray(curr_array) != 1) {
+      if (prev == NULL)
+        listhead = next;
+      else
+        prev->next = next;
+      curr_array->next = frees;
+      frees = curr_array;
+      ++counter;
+    }
+    else {
+      markarray(curr_array) = 0;
+      prev = curr_array;
+    }
+    curr_array = next;
   }
-  else
-  {
-   markarray(curr_array) = 0;
-   prev = curr_array;
-  }
-  curr_array = next;
- }
- return counter;
+  *acum += counter;
+  return frees;
 }
 
 
@@ -205,7 +220,7 @@ Long lua_hashcollector (void)
 ** executes garbage collection if the number of arrays created
 ** exceed a pre-defined range.
 */
-Hash *lua_createarray (Word nhash)
+Hash *lua_createarray (int nhash)
 {
  Hash *array;
  lua_pack();
@@ -217,32 +232,45 @@ Hash *lua_createarray (Word nhash)
 
 
 /*
-** Re-hash
+** Rehash:
+** Check if table has deleted slots. It it has, it does not need to
+** grow, since rehash will reuse them.
 */
+static int emptyslots (Hash *t)
+{
+  int i;
+  for (i=nhash(t)-1; i>=0; i--) {
+    Node *n = node(t, i);
+    if (ttype(ref(n)) != LUA_T_NIL && ttype(val(n)) == LUA_T_NIL)
+      return 1;
+  }
+  return 0;
+}
+
 static void rehash (Hash *t)
 {
- Word i;
- Word   nold = nhash(t);
- Node *vold = nodevector(t);
- nhash(t) = luaI_redimension(nhash(t));
- nodevector(t) = hashnodecreate(nhash(t));
- for (i=0; i<nold; i++)
- {
-  Node *n = vold+i;
-  if (tag(ref(n)) != LUA_T_NIL && tag(val(n)) != LUA_T_NIL)
-   *node(t, present(t, ref(n))) = *n;  /* copy old node to new hahs */
- }
- luaI_free(vold);
+  int   nold = nhash(t);
+  Node *vold = nodevector(t);
+  int i;
+  if (!emptyslots(t))
+    nhash(t) = luaI_redimension(nhash(t));
+  nodevector(t) = hashnodecreate(nhash(t));
+  for (i=0; i<nold; i++) {
+    Node *n = vold+i;
+    if (ttype(ref(n)) != LUA_T_NIL && ttype(val(n)) != LUA_T_NIL)
+      *node(t, present(t, ref(n))) = *n;  /* copy old node to new hash */
+  }
+  luaI_free(vold);
 }
 
 /*
 ** If the hash node is present, return its pointer, otherwise return
 ** null.
 */
-Object *lua_hashget (Hash *t, Object *ref)
+TObject *lua_hashget (Hash *t, TObject *ref)
 {
- Word h = present(t, ref);
- if (tag(ref(node(t, h))) != LUA_T_NIL) return val(node(t, h));
+ int h = present(t, ref);
+ if (ttype(ref(node(t, h))) != LUA_T_NIL) return val(node(t, h));
  else return NULL;
 }
 
@@ -251,25 +279,19 @@ Object *lua_hashget (Hash *t, Object *ref)
 ** If the hash node is present, return its pointer, otherwise create a new
 ** node for the given reference and also return its pointer.
 */
-Object *lua_hashdefine (Hash *t, Object *ref)
+TObject *lua_hashdefine (Hash *t, TObject *ref)
 {
- Word   h;
- Node *n;
- h = present(t, ref);
- n = node(t, h);
- if (tag(ref(n)) == LUA_T_NIL)
- {
-  nuse(t)++;
-  if ((float)nuse(t) > (float)nhash(t)*REHASH_LIMIT)
-  {
-   rehash(t);
-   h = present(t, ref);
-   n = node(t, h);
+  Node *n = node(t, present(t, ref));
+  if (ttype(ref(n)) == LUA_T_NIL) {
+    nuse(t)++;
+    if ((float)nuse(t) > (float)nhash(t)*REHASH_LIMIT) {
+      rehash(t);
+      n = node(t, present(t, ref));
+    }
+    *ref(n) = *ref;
+    ttype(val(n)) = LUA_T_NIL;
   }
-  *ref(n) = *ref;
-  tag(val(n)) = LUA_T_NIL;
- }
- return (val(n));
+  return (val(n));
 }
 
 
@@ -279,44 +301,32 @@ Object *lua_hashdefine (Hash *t, Object *ref)
 ** in the hash.
 ** This function pushs the element value and its reference to the stack.
 */
-static void hashnext (Hash *t, Word i)
+static void hashnext (Hash *t, int i)
 {
- if (i >= nhash(t))
- {
-  lua_pushnil(); lua_pushnil();
-  return;
- }
- while (tag(ref(node(t,i))) == LUA_T_NIL || tag(val(node(t,i))) == LUA_T_NIL)
- {
-  if (++i >= nhash(t))
-  {
-   lua_pushnil(); lua_pushnil();
-   return;
+  Node *n;
+  int tsize = nhash(t);
+  if (i >= tsize)
+    return;
+  n = node(t, i);
+  while (ttype(ref(n)) == LUA_T_NIL || ttype(val(n)) == LUA_T_NIL) {
+    if (++i >= tsize)
+      return;
+    n = node(t, i);
   }
- }
- luaI_pushobject(ref(node(t,i)));
- luaI_pushobject(val(node(t,i)));
+  luaI_pushobject(ref(node(t,i)));
+  luaI_pushobject(val(node(t,i)));
 }
 
 void lua_next (void)
 {
- Hash   *t;
- lua_Object o = lua_getparam(1);
- lua_Object r = lua_getparam(2);
- if (o == LUA_NOOBJECT || r == LUA_NOOBJECT)
-   lua_error ("too few arguments to function `next'");
- if (lua_getparam(3) != LUA_NOOBJECT)
-   lua_error ("too many arguments to function `next'");
- if (!lua_istable(o))
-   lua_error ("first argument of function `next' is not a table");
- t = avalue(luaI_Address(o));
- if (lua_isnil(r))
- {
-  hashnext(t, 0);
- }
- else
- {
-  Word h = present (t, luaI_Address(r));
-  hashnext(t, h+1);
- }
+  Hash *t;
+  lua_Object o = lua_getparam(1);
+  lua_Object r = lua_getparam(2);
+  luaL_arg_check(lua_istable(o), 1, "table expected");
+  luaL_arg_check(r != LUA_NOOBJECT, 2, "value expected");
+  t = avalue(luaI_Address(o));
+  if (lua_isnil(r))
+    hashnext(t, 0);
+  else
+    hashnext(t, present(t, luaI_Address(r))+1);
 }

hash.h

@@ -1,8 +1,7 @@
 /*
 ** hash.h
 ** hash manager for lua
-** Luiz Henrique de Figueiredo - 17 Aug 90
-** $Id: hash.h,v 2.9 1996/02/07 14:13:17 roberto Exp roberto $
+** $Id: hash.h,v 2.15 1997/03/31 14:02:58 roberto Exp roberto $
 */
 
 #ifndef hash_h
@@ -11,29 +10,30 @@
 #include "types.h"
 #include "opcode.h"
 
-typedef struct node
-{
- Object ref;
- Object val;
+typedef struct node {
+ TObject ref;
+ TObject val;
 } Node;
 
-typedef struct Hash
-{
- struct Hash   *next;
- char           mark;
- Word          nhash;
- Word           nuse;
- Node          *node;
+typedef struct Hash {
+  struct Hash *next;
+  Node *node;
+  int nhash;
+  int nuse;
+  int htag;
+  char mark;
 } Hash;
 
 
-int      lua_equalObj (Object *t1, Object *t2);
-Word     luaI_redimension (Word nhash);
-Hash    *lua_createarray (Word nhash);
+int      lua_equalObj (TObject *t1, TObject *t2);
+int      luaI_redimension (int nhash);
+Hash    *lua_createarray (int nhash);
 void     lua_hashmark (Hash *h);
-Long     lua_hashcollector (void);
-Object  *lua_hashget (Hash *t, Object *ref);
-Object 	*lua_hashdefine (Hash *t, Object *ref);
+Hash    *luaI_hashcollector (long *count);
+void luaI_hashcallIM (Hash *l);
+void luaI_hashfree (Hash *frees);
+TObject  *lua_hashget (Hash *t, TObject *ref);
+TObject 	*lua_hashdefine (Hash *t, TObject *ref);
 void     lua_next (void);
 
 #endif

inout.c

@@ -5,24 +5,24 @@
 ** Also provides some predefined lua functions.
 */
 
-char *rcs_inout="$Id: inout.c,v 2.31 1996/02/13 17:30:39 roberto Exp roberto $";
+char *rcs_inout="$Id: inout.c,v 2.68 1997/06/26 20:47:43 roberto Exp roberto $";
 
 #include <stdio.h>
-#include <stdlib.h>
+#include <string.h>
 
-#include "lex.h"
-#include "opcode.h"
+#include "auxlib.h"
+#include "fallback.h"
+#include "hash.h"
 #include "inout.h"
+#include "lex.h"
+#include "lua.h"
+#include "luamem.h"
+#include "luamem.h"
+#include "opcode.h"
 #include "table.h"
 #include "tree.h"
-#include "lua.h"
-
-
-#ifndef MAXFUNCSTACK
-#define MAXFUNCSTACK 100
-#endif
-
-#define MAXMESSAGE MAXFUNCSTACK*80
+#include "undump.h"
+#include "zio.h"
 
 
 /* Exported variables */
@@ -30,135 +30,178 @@ Word lua_linenumber;
 char *lua_parsedfile;
 
 
-static FILE *fp;
-static char *st;
+char *luaI_typenames[] = { /* ORDER LUA_T */
+  "userdata", "line", "cmark", "mark", "function",
+  "function", "table", "string", "number", "nil",
+  NULL
+};
 
-/*
-** Function to get the next character from the input file
-*/
-static int fileinput (void)
+
+
+void luaI_setparsedfile (char *name)
 {
- return fgetc (fp);
+  lua_parsedfile = luaI_createfixedstring(name)->str;
 }
 
-/*
-** Function to get the next character from the input string
-*/
-static int stringinput (void)
+
+int lua_doFILE (FILE *f, int bin)
 {
- return *st++;
+  ZIO z;
+  luaZ_Fopen(&z, f);
+  if (bin)
+    return luaI_undump(&z);
+  else {
+    lua_setinput(&z);
+    return lua_domain();
+  }
+}                      
+
+
+int lua_dofile (char *filename)
+{
+  int status;
+  int c;
+  FILE *f = (filename == NULL) ? stdin : fopen(filename, "r");
+  if (f == NULL)
+    return 2;
+  luaI_setparsedfile(filename?filename:"(stdin)");
+  c = fgetc(f);
+  ungetc(c, f);
+  if (c == ID_CHUNK) {
+    f = freopen(filename, "rb", f);  /* set binary mode */
+    status = lua_doFILE(f, 1);
+  }
+  else {
+    if (c == '#')
+      while ((c=fgetc(f)) != '\n') /* skip first line */;
+    status = lua_doFILE(f, 0);
+  }
+  if (f != stdin)
+    fclose(f);
+  return status;
+}                      
+
+
+
+#define SIZE_PREF 20  /* size of string prefix to appear in error messages */
+
+
+int lua_dobuffer (char *buff, int size)
+{
+  int status;
+  ZIO z;
+  luaI_setparsedfile("(buffer)");
+  luaZ_mopen(&z, buff, size);
+  status = luaI_undump(&z);
+  return status;
 }
 
-/*
-** Function to open a file to be input unit. 
-** Return 0 on success or 1 error.
-*/
-int lua_openfile (char *fn)
+
+int lua_dostring (char *str)
 {
- lua_setinput (fileinput);
- if (fn == NULL)
- {
-   fp = stdin;
-   fn = "(stdin)";
- }
- else
-   fp = fopen (fn, "r");
- if (fp == NULL)
-   return 1;
- lua_linenumber = 1;
- lua_parsedfile = lua_constcreate(fn)->str;
- return 0;
+  int status;
+  char buff[SIZE_PREF+25];
+  char *temp;
+  ZIO z;
+  if (str == NULL) return 1;
+  sprintf(buff, "(dostring) >> %.20s", str);
+  temp = strchr(buff, '\n');
+  if (temp) *temp = 0;  /* end string after first line */
+  luaI_setparsedfile(buff);
+  luaZ_sopen(&z, str);
+  lua_setinput(&z);
+  status = lua_domain();
+  return status;
 }
 
-/*
-** Function to close an opened file
-*/
-void lua_closefile (void)
+
+
+
+static int passresults (void)
 {
- if (fp != NULL && fp != stdin)
- {
-  fclose (fp);
-  fp = NULL;
- }
+  int arg = 0;
+  lua_Object obj;
+  while ((obj = lua_getresult(++arg)) != LUA_NOOBJECT)
+    lua_pushobject(obj);
+  return arg-1;
 }
 
-/*
-** Function to open a string to be input unit
-*/
-void lua_openstring (char *s)
-{
- lua_setinput (stringinput);
- st = s;
- lua_linenumber = 1;
- lua_parsedfile = lua_constcreate("(string)")->str;
-}
 
-/*
-** Function to close an opened string
-*/
-void lua_closestring (void)
+static void packresults (void)
 {
+  int arg = 0;
+  lua_Object obj;
+  lua_Object table = lua_createtable();
+  while ((obj = lua_getresult(++arg)) != LUA_NOOBJECT) {
+    lua_pushobject(table);
+    lua_pushnumber(arg);
+    lua_pushobject(obj);
+    lua_rawsettable();
+  }
+  lua_pushobject(table);
+  lua_pushstring("n");
+  lua_pushnumber(arg-1);
+  lua_rawsettable();
+  lua_pushobject(table);  /* final result */
 }
-
  
 /*
 ** Internal function: do a string
 */
-void lua_internaldostring (void)
+static void lua_internaldostring (void)
 {
- lua_Object obj = lua_getparam (1);
- if (lua_isstring(obj) && !lua_dostring(lua_getstring(obj)))
-  lua_pushnumber(1);
- else
-  lua_pushnil();
+  lua_Object err = lua_getparam(2);
+  if (err != LUA_NOOBJECT) {  /* set new error method */
+    luaL_arg_check(lua_isnil(err) || lua_isfunction(err), 2,
+                   "must be a valid error handler");
+    lua_pushobject(err);
+    err = lua_seterrormethod();
+  }
+  if (lua_dostring(luaL_check_string(1)) == 0)
+    if (passresults() == 0)
+      lua_pushuserdata(NULL);  /* at least one result to signal no errors */
+  if (err != LUA_NOOBJECT) {  /* restore old error method */
+    lua_pushobject(err);
+    lua_seterrormethod();
+  }
 }
 
 /*
 ** Internal function: do a file
 */
-void lua_internaldofile (void)
+static void lua_internaldofile (void)
 {
- lua_Object obj = lua_getparam (1);
- char *fname = NULL;
- if (lua_isstring(obj))
-   fname = lua_getstring(obj);
- else if (obj != LUA_NOOBJECT)
-   lua_error("invalid argument to function `dofile'");
- /* else fname = NULL */
- if (!lua_dofile(fname))
-  lua_pushnumber(1);
- else
-  lua_pushnil();
+ char *fname = luaL_opt_string(1, NULL);
+ if (lua_dofile(fname) == 0)
+    if (passresults() == 0)
+      lua_pushuserdata(NULL);  /* at least one result to signal no errors */
 }
  
 
 static char *tostring (lua_Object obj)
 {
-  static char buff[20];
-  if (lua_isstring(obj))
-    return lua_getstring(obj);
-  if (lua_isnumber(obj))
-    sprintf(buff, "%g", lua_getnumber(obj));
-  else if (lua_isfunction(obj))
-    sprintf(buff, "function: %p", (luaI_Address(obj))->value.tf);
-  else if (lua_iscfunction(obj))
-    sprintf(buff, "cfunction: %p", lua_getcfunction(obj));
-  else if (lua_isuserdata(obj))
-    sprintf(buff, "userdata: %p", lua_getuserdata(obj));
-  else if (lua_istable(obj))
-    sprintf(buff, "table: %p", avalue(luaI_Address(obj)));
-  else if (lua_isnil(obj))
-    sprintf(buff, "nil");
-  else buff[0] = 0;
-  return buff;
+  TObject *o = luaI_Address(obj);
+  switch (ttype(o)) {
+    case LUA_T_NUMBER:  case LUA_T_STRING:
+      return lua_getstring(obj);
+    case LUA_T_ARRAY: case LUA_T_FUNCTION:
+    case LUA_T_CFUNCTION: case LUA_T_NIL:
+      return luaI_typenames[-ttype(o)];
+    case LUA_T_USERDATA: {
+      char *buff = luaI_buffer(30);
+      sprintf(buff, "userdata: %p", o->value.ts->u.v);
+      return buff;
+    }
+    default: return "<unknown object>";
+  }
 }
 
-void luaI_tostring (void)
+static void luaI_tostring (void)
 {
   lua_pushstring(tostring(lua_getparam(1)));
 }
 
-void luaI_print (void)
+static void luaI_print (void)
 {
   int i = 1;
   lua_Object obj;
@@ -166,92 +209,200 @@ void luaI_print (void)
     printf("%s\n", tostring(obj));
 }
 
-/*
-** Internal function: return an object type.
-*/
-void luaI_type (void)
+static void luaI_type (void)
 {
   lua_Object o = lua_getparam(1);
-  int t;
-  if (o == LUA_NOOBJECT)
-    lua_error("no parameter to function 'type'");
-  t = lua_type(o);
-  switch (t)
-  {
-    case LUA_T_NIL :
-      lua_pushliteral("nil");
-      break;
-    case LUA_T_NUMBER :
-      lua_pushliteral("number");
-      break;
-    case LUA_T_STRING :
-      lua_pushliteral("string");
-      break;
-    case LUA_T_ARRAY :
-      lua_pushliteral("table");
-      break;
-    case LUA_T_FUNCTION :
-    case LUA_T_CFUNCTION :
-      lua_pushliteral("function");
-      break;
-    default :
-      lua_pushliteral("userdata");
-      break;
-  }
-  lua_pushnumber(t);
+  luaL_arg_check(o != LUA_NOOBJECT, 1, "no argument");
+  lua_pushstring(luaI_typenames[-ttype(luaI_Address(o))]);
+  lua_pushnumber(lua_tag(o));
 }
- 
+
 /*
 ** Internal function: convert an object to a number
 */
-void lua_obj2number (void)
+static void lua_obj2number (void)
 {
   lua_Object o = lua_getparam(1);
   if (lua_isnumber(o))
-    lua_pushobject(o);
-  else if (lua_isstring(o))
-  {
-    char c;
-    float f;
-    if (sscanf(lua_getstring(o),"%f %c",&f,&c) == 1)
-      lua_pushnumber(f);
-    else
-      lua_pushnil();
-  }
-  else
-    lua_pushnil();
+    lua_pushnumber(lua_getnumber(o));
 }
 
 
-void luaI_error (void)
+static void luaI_error (void)
 {
   char *s = lua_getstring(lua_getparam(1));
   if (s == NULL) s = "(no message)";
   lua_error(s);
 }
 
-void luaI_assert (void)
+static void luaI_assert (void)
 {
   lua_Object p = lua_getparam(1);
   if (p == LUA_NOOBJECT || lua_isnil(p))
     lua_error("assertion failed!");
 }
 
-void luaI_setglobal (void)
+static void luaI_setglobal (void)
 {
-  lua_Object name = lua_getparam(1);
   lua_Object value = lua_getparam(2);
-  if (!lua_isstring(name))
-    lua_error("incorrect argument to function `setglobal'");
+  luaL_arg_check(value != LUA_NOOBJECT, 2, NULL);
   lua_pushobject(value);
-  lua_storeglobal(lua_getstring(name));
+  lua_setglobal(luaL_check_string(1));
   lua_pushobject(value);  /* return given value */
 }
 
-void luaI_getglobal (void)
+static void luaI_rawsetglobal (void)
 {
-  lua_Object name = lua_getparam(1);
-  if (!lua_isstring(name))
-    lua_error("incorrect argument to function `getglobal'");
-  lua_pushobject(lua_getglobal(lua_getstring(name)));
+  lua_Object value = lua_getparam(2);
+  luaL_arg_check(value != LUA_NOOBJECT, 2, NULL);
+  lua_pushobject(value);
+  lua_rawsetglobal(luaL_check_string(1));
+  lua_pushobject(value);  /* return given value */
 }
+
+static void luaI_getglobal (void)
+{
+  lua_pushobject(lua_getglobal(luaL_check_string(1)));
+}
+
+static void luaI_rawgetglobal (void)
+{
+  lua_pushobject(lua_rawgetglobal(luaL_check_string(1)));
+}
+
+static void luatag (void)
+{
+  lua_pushnumber(lua_tag(lua_getparam(1)));
+}
+
+
+static int getnarg (lua_Object table)
+{
+  lua_Object temp;
+  /* temp = table.n */
+  lua_pushobject(table); lua_pushstring("n"); temp = lua_gettable();
+  return (lua_isnumber(temp) ? lua_getnumber(temp) : MAX_WORD);
+}
+
+static void luaI_call (void)
+{
+  lua_Object f = lua_getparam(1);
+  lua_Object arg = lua_getparam(2);
+  int withtable = (strcmp(luaL_opt_string(3, ""), "pack") == 0);
+  int narg, i;
+  luaL_arg_check(lua_isfunction(f), 1, "function expected");
+  luaL_arg_check(lua_istable(arg), 2, "table expected");
+  narg = getnarg(arg);
+  /* push arg[1...n] */
+  for (i=0; i<narg; i++) {
+    lua_Object temp;
+    /* temp = arg[i+1] */
+    lua_pushobject(arg); lua_pushnumber(i+1); temp = lua_gettable();
+    if (narg == MAX_WORD && lua_isnil(temp))
+      break;
+    lua_pushobject(temp);
+  }
+  if (lua_callfunction(f))
+    lua_error(NULL);
+  else if (withtable)
+    packresults();
+  else
+    passresults();
+}
+
+static void luaIl_settag (void)
+{
+  lua_Object o = lua_getparam(1);
+  luaL_arg_check(lua_istable(o), 1, "table expected");
+  lua_pushobject(o);
+  lua_settag(luaL_check_number(2));
+}
+
+static void luaIl_newtag (void)
+{
+  lua_pushnumber(lua_newtag());
+}
+
+static void rawgettable (void)
+{
+  lua_Object t = lua_getparam(1);
+  lua_Object i = lua_getparam(2);
+  luaL_arg_check(t != LUA_NOOBJECT, 1, NULL);
+  luaL_arg_check(i != LUA_NOOBJECT, 2, NULL);
+  lua_pushobject(t);
+  lua_pushobject(i);
+  lua_pushobject(lua_rawgettable());
+}
+
+static void rawsettable (void)
+{
+  lua_Object t = lua_getparam(1);
+  lua_Object i = lua_getparam(2);
+  lua_Object v = lua_getparam(3);
+  luaL_arg_check(t != LUA_NOOBJECT && i != LUA_NOOBJECT && v != LUA_NOOBJECT,
+                 0, NULL);
+  lua_pushobject(t);
+  lua_pushobject(i);
+  lua_pushobject(v);
+  lua_rawsettable();
+}
+
+
+static void luaI_collectgarbage (void)
+{
+  lua_pushnumber(lua_collectgarbage(luaL_opt_number(1, 0)));
+}
+
+
+/*
+** Internal functions
+*/
+static struct {
+  char *name;
+  lua_CFunction func;
+} int_funcs[] = {
+  {"assert", luaI_assert},
+  {"call", luaI_call},
+  {"collectgarbage", luaI_collectgarbage},
+  {"dofile", lua_internaldofile},
+  {"dostring", lua_internaldostring},
+  {"error", luaI_error},
+  {"getglobal", luaI_getglobal},
+  {"newtag", luaIl_newtag},
+  {"next", lua_next},
+  {"nextvar", luaI_nextvar},
+  {"print", luaI_print},
+  {"rawgetglobal", luaI_rawgetglobal},
+  {"rawgettable", rawgettable},
+  {"rawsetglobal", luaI_rawsetglobal},
+  {"rawsettable", rawsettable},
+  {"seterrormethod", luaI_seterrormethod},
+#if LUA_COMPAT2_5
+  {"setfallback", luaI_setfallback},
+#endif
+  {"setglobal", luaI_setglobal},
+  {"settagmethod", luaI_settagmethod},
+  {"gettagmethod", luaI_gettagmethod},
+  {"settag", luaIl_settag},
+  {"tonumber", lua_obj2number},
+  {"tostring", luaI_tostring},
+  {"tag", luatag},
+  {"type", luaI_type}
+};
+
+#define INTFUNCSIZE (sizeof(int_funcs)/sizeof(int_funcs[0]))
+
+
+void luaI_predefine (void)
+{
+  int i;
+  Word n;
+  for (i=0; i<INTFUNCSIZE; i++) {
+    n = luaI_findsymbolbyname(int_funcs[i].name);
+    s_ttype(n) = LUA_T_CFUNCTION; s_fvalue(n) = int_funcs[i].func;
+  }
+  n = luaI_findsymbolbyname("_VERSION");
+  s_ttype(n) = LUA_T_STRING; s_tsvalue(n) = lua_createstring(LUA_VERSION);
+}
+
+

inout.h

@@ -1,5 +1,5 @@
 /*
-** $Id: inout.h,v 1.12 1996/01/26 14:05:28 roberto Exp roberto $
+** $Id: inout.h,v 1.19 1997/06/18 20:35:49 roberto Exp roberto $
 */
 
 
@@ -7,26 +7,19 @@
 #define inout_h
 
 #include "types.h"
+#include <stdio.h>
 
 
 extern Word lua_linenumber;
 extern Word lua_debugline;
 extern char *lua_parsedfile;
 
-int  lua_openfile     (char *fn);
-void lua_closefile    (void);
-void lua_openstring   (char *s);
-void lua_closestring  (void);
+void luaI_setparsedfile (char *name);
+
+void luaI_predefine (void);
+
+int lua_dobuffer (char *buff, int size);
+int lua_doFILE (FILE *f, int bin);
 
-void    lua_internaldofile (void);
-void    lua_internaldostring (void);
-void    luaI_tostring   (void);
-void    luaI_print      (void);
-void    luaI_type       (void);
-void    lua_obj2number (void);
-void	luaI_error     (void);
-void    luaI_assert    (void);
-void	luaI_setglobal (void);
-void	luaI_getglobal (void);
 
 #endif

iolib.c

@@ -1,24 +1,16 @@
-/*
-** iolib.c
-** Input/output library to LUA
-*/
-
-char *rcs_iolib="$Id: iolib.c,v 1.35 1996/02/09 19:35:23 roberto Exp roberto $";
-
 #include <stdio.h>
-#include <ctype.h>
-#include <sys/types.h>
-#include <sys/stat.h>
 #include <string.h>
 #include <time.h>
 #include <stdlib.h>
 #include <errno.h>
 
 #include "lua.h"
+#include "auxlib.h"
 #include "luadebug.h"
 #include "lualib.h"
 
-static FILE *in=stdin, *out=stdout;
+
+int lua_tagio;
 
 
 #ifdef POPEN
@@ -30,560 +22,270 @@ int pclose();
 #endif
 
 
-static void closeread (void)
+static void pushresult (int i)
 {
-  if (in != stdin)
-  {
-    if (pclose(in) == -1)
-      fclose(in);
-    in = stdin;
+  if (i)
+    lua_pushuserdata(NULL);
+  else {
+    lua_pushnil();
+#ifndef NOSTRERROR
+    lua_pushstring(strerror(errno));
+#else
+    lua_pushstring("O.S. unable to define the error");
+#endif
   }
 }
 
-static void closewrite (void)
+
+
+static FILE *getfile (char *name)
 {
-  if (out != stdout)
-  {
-    if (pclose(out) == -1)
-      fclose(out);
-    out = stdout;
-  }
+  lua_Object f = lua_getglobal(name);
+  if (!lua_isuserdata(f) || lua_tag(f) != lua_tagio)
+    luaL_verror("global variable %s is not a file handle", name);
+  return lua_getuserdata(f);
 }
 
-/*
-** Open a file to read.
-** LUA interface:
-**			status = readfrom (filename)
-** where:
-**			status = 1 -> success
-**			status = nil -> error
-*/
+
+static void closefile (char *name)
+{
+  FILE *f = getfile(name);
+  if (f == stdin || f == stdout) return;
+  if (pclose(f) == -1)
+    fclose(f);
+}
+
+
+static void setfile (FILE *f, char *name)
+{
+  lua_pushusertag(f, lua_tagio);
+  lua_setglobal(name);
+}
+
+
+static void setreturn (FILE *f, char *name)
+{
+  setfile(f, name);
+  lua_pushusertag(f, lua_tagio);
+}
+
+
 static void io_readfrom (void)
 {
- if (lua_getparam (1) == LUA_NOOBJECT)	
- { /* restore standart input */
-  closeread();
-  lua_pushnumber (1);
- }
- else
- {
-   char *s = lua_check_string(1, "readfrom");
-   FILE *fp = (*s == '|') ? popen(s+1, "r") : fopen(s, "r");
-   if (fp == NULL)
-    lua_pushnil();
-   else
-   {
-    closeread();
-    in = fp;
-    lua_pushnumber (1);
-   }
- }
+  FILE *current;
+  lua_Object f = lua_getparam(1);
+  if (f == LUA_NOOBJECT) {
+    closefile("_INPUT");
+    current = stdin;
+  }
+  else if (lua_tag(f) == lua_tagio)
+    current = lua_getuserdata(f);
+  else {
+    char *s = luaL_check_string(1);
+    current = (*s == '|') ? popen(s+1, "r") : fopen(s, "r");
+    if (current == NULL) {
+      pushresult(0);
+      return;
+    }
+  }
+  setreturn(current, "_INPUT");
 }
 
 
-/*
-** Open a file to write.
-** LUA interface:
-**			status = writeto (filename)
-** where:
-**			status = 1 -> success
-**			status = nil -> error
-*/
 static void io_writeto (void)
 {
- if (lua_getparam (1) == LUA_NOOBJECT)	/* restore standart output */
- {
-  closewrite();
-  lua_pushnumber (1);
- }
- else
- {
-   char *s = lua_check_string(1, "writeto");
-   FILE *fp = (*s == '|') ? popen(s+1,"w") : fopen(s,"w");
-   if (fp == NULL)
-    lua_pushnil();
-   else
-   {
-    closewrite();
-    out = fp;
-    lua_pushnumber (1);
-   }
- }
+  FILE *current;
+  lua_Object f = lua_getparam(1);
+  if (f == LUA_NOOBJECT) {
+    closefile("_OUTPUT");
+    current = stdout;
+  }
+  else if (lua_tag(f) == lua_tagio)
+    current = lua_getuserdata(f);
+  else {
+    char *s = luaL_check_string(1);
+    current = (*s == '|') ? popen(s+1,"w") : fopen(s,"w");
+    if (current == NULL) {
+      pushresult(0);
+      return;
+    }
+  }
+  setreturn(current, "_OUTPUT");
 }
 
 
-/*
-** Open a file to write appended.
-** LUA interface:
-**			status = appendto (filename)
-** where:
-**			status = 2 -> success (already exist)
-**			status = 1 -> success (new file)
-**			status = nil -> error
-*/
 static void io_appendto (void)
 {
- char *s = lua_check_string(1, "appendto");
- struct stat st;
- int r = (stat(s, &st) == -1) ? 1 : 2;
- FILE *fp = fopen (s, "a");
- if (fp == NULL)
-  lua_pushnil();
- else
- {
-  if (out != stdout) fclose (out);
-  out = fp;
-  lua_pushnumber (r);
- }
-}
-
-
-static char getformat (char *f, int *just, int *m, int *n)
-{
-  int t;
-  switch (*f++)
-  {
-    case 'q': case 'Q':
-    case 's': case 'S':
-    case 'i': case 'I':
-      t = tolower(*(f-1));
-      break;
-    case 'f': case 'F': case 'g': case 'G': case 'e': case 'E':
-      t = 'f';
-      break;
-    default:
-      t = 0;  /* to avoid compiler warnings */
-      lua_arg_error("read/write (format)");
-  }
-  *just = (*f == '<' || *f == '>' || *f == '|') ? *f++ : '>';
-  if (isdigit(*f))
-  {
-    *m = 0;
-    while (isdigit(*f))
-      *m = *m*10 + (*f++ - '0');
-  }
+  char *s = luaL_check_string(1);
+  FILE *fp = fopen (s, "a");
+  if (fp != NULL)
+    setreturn(fp, "_OUTPUT");
   else
-    *m = -1;
-  if (*f == '.')
-  {
-    f++;	/* skip point */
-    *n = 0;
-    while (isdigit(*f))
-      *n = *n*10 + (*f++ - '0');
-  }
-  else
-    *n = -1;
-  return t;
+    pushresult(0);
 }
 
 
-/*
-** Read a variable. On error put nil on stack.
-** LUA interface:
-**			variable = read ([format])
-**
-** O formato pode ter um dos seguintes especificadores:
-**
-**	s ou S -> para string
-**	f ou F, g ou G, e ou E -> para reais
-**	i ou I -> para inteiros
-**
-**	Estes especificadores podem vir seguidos de numero que representa
-**	o numero de campos a serem lidos.
-*/
-
-static int read_until_char (int del)
-{
-  int c;
-  while((c = fgetc(in)) != EOF && c != del)
-    luaI_addchar(c);
-  return c;
-}
-
-static void read_until_blank (void)
-{
-  int c;
-  while((c = fgetc(in)) != EOF && !isspace(c))
-    luaI_addchar(c);
-  if (c != EOF) ungetc(c,in);
-}
-
-static void read_m (int m)
-{
-  int c;
-  while (m-- && (c = fgetc(in)) != EOF)
-    luaI_addchar(c);
-}
-
-
-static void read_free (void)
-{
-  int c;
-  while (isspace(c=fgetc(in)))
-   ;
-  if (c == EOF)
-  {
-    lua_pushnil();
-    return;
-  }
-  if (c == '\"' || c == '\'')
-  { /* string */
-    c = read_until_char(c);
-    if (c == EOF)
-      lua_pushnil();
-    else
-      lua_pushstring(luaI_addchar(0));
-  }
-  else
-  {
-    double d;
-    char dummy;
-    char *s;
-    luaI_addchar(c);
-    read_until_blank();
-    s = luaI_addchar(0);
-    if (sscanf(s, "%lf %c", &d, &dummy) == 1)
-      lua_pushnumber(d);
-    else
-     lua_pushstring(s);
-  }
-}
+#define NEED_OTHER (EOF-1)  /* just some flag different from EOF */
 
 static void io_read (void)
 {
-  lua_Object o = lua_getparam (1);
-  luaI_addchar(0);  /* initialize buffer */
-  if (o == LUA_NOOBJECT) 	/* free format */
-    read_free();
-  else				/* formatted */
-  {
-    int m, dummy1, dummy2;
-    switch (getformat(lua_check_string(1, "read"), &dummy1, &m, &dummy2))
-    {
-      case 's':
-      {
-        char *s;
-        if (m < 0)
-          read_until_blank();
-        else
-          read_m(m);
-        s = luaI_addchar(0);
-        if ((m >= 0 && strlen(s) == m) || (m < 0 && strlen(s) > 0))
-          lua_pushstring(s);
-        else
-          lua_pushnil();
-        break;
-      }
-
-      case 'i':  /* can read as float, since it makes no difference to Lua */
-      case 'f':
-      {
-        double d;
-        int result;
-        if (m < 0)
-          result = fscanf(in, "%lf", &d);
-        else
-        {
-          read_m(m);
-          result = sscanf(luaI_addchar(0), "%lf", &d);
-        }
-        if (result == 1)
-          lua_pushnumber(d);
-        else
-          lua_pushnil();
-        break;
-      }
-      default:
-        lua_arg_error("read (format)");
+  FILE *f = getfile("_INPUT");
+  char *buff;
+  char *p = luaL_opt_string(1, "[^\n]*{\n}");
+  int inskip = 0;  /* to control {skips} */
+  int c = NEED_OTHER;
+  luaI_emptybuff();
+  while (*p) {
+    if (*p == '{') {
+      inskip++;
+      p++;
     }
-  }
-}
-
-
-/*
-** Read characters until a given one. The delimiter is not read.
-*/
-static void io_readuntil (void)
-{
- int del, c;
- lua_Object p = lua_getparam(1);
- luaI_addchar(0);  /* initialize buffer */
- if (p == LUA_NOOBJECT || lua_isnil(p))
-   del = EOF;
- else
-  del = *lua_check_string(1, "readuntil");
- c = read_until_char(del);
- if (c != EOF) ungetc(c,in);
- lua_pushstring(luaI_addchar(0));
-}
-
-
-/*
-** Write a variable. On error put 0 on stack, otherwise put 1.
-** LUA interface:
-**			status = write (variable [,format])
-**
-** O formato pode ter um dos seguintes especificadores:
-**
-**	s ou S -> para string
-**	f ou F, g ou G, e ou E -> para reais
-**	i ou I -> para inteiros
-**
-**	Estes especificadores podem vir seguidos de:
-**
-**		[?][m][.n]
-**
-**	onde:
-**		? -> indica justificacao
-**			< = esquerda
-**			| = centro
-**			> = direita (default)
-**		m -> numero maximo de campos (se exceder estoura)
-**		n -> indica precisao para
-**			reais -> numero de casas decimais
-**			inteiros -> numero minimo de digitos
-**			string -> nao se aplica
-*/
-
-static int write_fill (int n, int c)
-{
-  while (n--)
-    if (fputc(c, out) == EOF)
-      return 0;
-  return 1;
-}
-
-static int write_string (char *s, int just, int m)
-{
-  int status;
-  int l = strlen(s);
-  int pre;  /* number of blanks before string */
-  if (m < 0) m = l;
-  else if (l > m)
-  {
-    write_fill(m, '*');
-    return 0;
-  }
-  pre = (just == '<') ? 0 : (just == '>') ? m-l : (m-l)/2;
-  status = write_fill(pre, ' ');
-  status = status && fprintf(out, "%s", s) >= 0;
-  status = status && write_fill(m-(l+pre), ' ');
-  return status;
-}
-
-static int write_quoted (int just, int m)
-{
-  char *s = lua_check_string(1, "write");
-  luaI_addchar(0);
-  luaI_addchar('"');
-  while (1)
-  {
-    switch (*s)
-    {
-      case '"':  case '\\':  case '\n':
-        luaI_addchar('\\');
-        luaI_addchar(*s);
-        break;
-      case 0:
-        goto END_WHILE;
-      default:
-        luaI_addchar(*s);
+    else if (*p == '}') {
+      if (inskip == 0)
+        lua_error("unbalanced braces in read pattern");
+      inskip--;
+      p++;
     }
-    s++;
-  } END_WHILE:
-  luaI_addchar('"');
-  return write_string(luaI_addchar(0), just, m);
-}
-
-static int write_float (int just, int m, int n)
-{
-  char buffer[100];
-  lua_Object p = lua_getparam(1);
-  float number;
-  if (!lua_isnumber(p)) return 0;
-  number = lua_getnumber(p);
-  if (n >= 0)
-    sprintf(buffer, "%.*f", n, number);
-  else
-    sprintf(buffer, "%g", number);
-  return write_string(buffer, just, m);
-}
-
-
-static int write_int (int just, int m, int n)
-{
-  char buffer[100];
-  lua_Object p = lua_getparam(1);
-  int number;
-  if (!lua_isnumber(p)) return 0;
-  number = (int)lua_getnumber(p);
-  if (n >= 0)
-    sprintf(buffer, "%.*d", n, number);
-  else
-    sprintf(buffer, "%d", number);
-  return write_string(buffer, just, m);
+    else {
+      char *ep = luaL_item_end(p);  /* get what is next */
+      int m;  /* match result */
+      if (c == NEED_OTHER) c = getc(f);
+      m = (c == EOF) ? 0 : luaL_singlematch((char)c, p);
+      if (m) {
+        if (inskip == 0) luaI_addchar(c);
+        c = NEED_OTHER;
+      }
+      switch (*ep) {
+        case '*':  /* repetition */
+          if (!m) p = ep+1;  /* else stay in (repeat) the same item */
+          break;
+        case '?':  /* optional */
+          p = ep+1;  /* continues reading the pattern */
+          break;
+        default:
+          if (m) p = ep;  /* continues reading the pattern */
+          else
+            goto break_while;   /* pattern fails */
+      }
+    }
+  } break_while:
+  if (c >= 0)  /* not EOF nor NEED_OTHER? */
+     ungetc(c, f);
+  buff = luaI_addchar(0);
+  if (*buff != 0 || *p == 0)  /* read something or did not fail? */
+    lua_pushstring(buff);
 }
 
 
 static void io_write (void)
 {
-  int status = 0;
-  if (lua_getparam (2) == LUA_NOOBJECT)   /* free format */
-  {
-    lua_Object o1 = lua_getparam(1);
-    if (lua_isnumber(o1))
-      status = fprintf (out, "%g", lua_getnumber(o1)) >= 0;
-    else if (lua_isstring(o1))
-      status = fprintf (out, "%s", lua_getstring(o1)) >= 0;
-  }
-  else					/* formated */
-  {
-    int just, m, n;
-    switch (getformat(lua_check_string(2, "write"), &just, &m, &n))
-    {
-      case 's':
-      {
-        lua_Object p = lua_getparam(1);
-        if (lua_isstring(p))
-          status = write_string(lua_getstring(p), just, m);
-        else
-          status = 0;
-        break;
-      }
-      case 'q':
-        status = write_quoted(just, m);
-        break;
-      case 'f':
-        status = write_float(just, m, n);
-        break;
-      case 'i':
-        status = write_int(just, m, n);
-        break;
-    }
-  }
-  if (status)
-    lua_pushnumber(status);
-  else
-    lua_pushnil();
+  FILE *f = getfile("_OUTPUT");
+  int arg = 1;
+  int status = 1;
+  char *s;
+  while ((s = luaL_opt_string(arg++, NULL)) != NULL)
+    status = status && (fputs(s, f) != EOF);
+  pushresult(status);
 }
 
-/*
-** Execute a executable program using "system".
-** Return the result of execution.
-*/
+
 static void io_execute (void)
 {
-  lua_pushnumber(system(lua_check_string(1, "execute")));
+  lua_pushnumber(system(luaL_check_string(1)));
 }
 
-/*
-** Remove a file. On error return nil.
-*/
+
 static void io_remove  (void)
 {
- if (remove(lua_check_string(1, "remove")) == 0)
-   lua_pushnumber (1);
- else
-   lua_pushnil();
+  pushresult(remove(luaL_check_string(1)) == 0);
 }
 
-static void io_errorno (void)
+
+static void io_rename (void)
 {
-/*  lua_pushstring(strerror(errno));*/
+  pushresult(rename(luaL_check_string(1),
+                    luaL_check_string(2)) == 0);
 }
 
 
-/*
-** To get a environment variable
-*/
+static void io_tmpname (void)
+{
+  lua_pushstring(tmpnam(NULL));
+}
+
+
+
 static void io_getenv (void)
 {
- char *env = getenv(lua_check_string(1, "getenv"));
- if (env == NULL) lua_pushnil();
- else             lua_pushstring(env); 
+  lua_pushstring(getenv(luaL_check_string(1))); /* if NULL push nil */
 }
 
-/*
-** Return user formatted time stamp
-*/
+
 static void io_date (void)
 {
- time_t t;
- struct tm *tm;
- char *s;
- char b[BUFSIZ];
- if (lua_getparam(1) == LUA_NOOBJECT)
-  s = "%c";
- else
-  s = lua_check_string(1, "date");
- time(&t); tm = localtime(&t);
- if (strftime(b,sizeof(b),s,tm))
-  lua_pushstring(b);
- else
-  lua_error("invalid `date' format");
+  time_t t;
+  struct tm *tm;
+  char *s = luaL_opt_string(1, "%c");
+  char b[BUFSIZ];
+  time(&t); tm = localtime(&t);
+  if (strftime(b,sizeof(b),s,tm))
+    lua_pushstring(b);
+  else
+    lua_error("invalid `date' format");
 }
  
-/*
-** To exit
-*/
+
 static void io_exit (void)
 {
- lua_Object o = lua_getparam(1);
- if (lua_isstring(o))
-  fprintf(stderr, "%s\n", lua_getstring(o));
- exit(1);
+  lua_Object o = lua_getparam(1);
+  exit(lua_isnumber(o) ? (int)lua_getnumber(o) : 1);
 }
 
-/*
-** To debug a lua program. Start a dialog with the user, interpreting
-   lua commands until an 'cont'.
-*/
+
 static void io_debug (void)
 {
-  while (1)
-  {
+  while (1) {
     char buffer[250];
     fprintf(stderr, "lua_debug> ");
-    if (gets(buffer) == 0) return;
-    if (strcmp(buffer, "cont") == 0) return;
+    if (fgets(buffer, sizeof(buffer), stdin) == 0) return;
+    if (strcmp(buffer, "cont\n") == 0) return;
     lua_dostring(buffer);
   }
 }
 
 
-void lua_printstack (FILE *f)
+static void lua_printstack (FILE *f)
 {
-  int level = 0;
+  int level = 1;  /* skip level 0 (it's this function) */
   lua_Object func;
-  fprintf(f, "Active Stack:\n");
-  while ((func = lua_stackedfunction(level++)) != LUA_NOOBJECT)
-  {
+  while ((func = lua_stackedfunction(level++)) != LUA_NOOBJECT) {
     char *name;
     int currentline;
-    fprintf(f, "\t");
-    switch (*lua_getobjname(func, &name))
-    {
+    char *filename;
+    int linedefined;
+    lua_funcinfo(func, &filename, &linedefined);
+    fprintf(f, (level==2) ? "Active Stack:\n\t" : "\t");
+    switch (*lua_getobjname(func, &name)) {
       case 'g':
         fprintf(f, "function %s", name);
         break;
-      case 'f':
-        fprintf(f, "fallback %s", name);
+      case 't':
+        fprintf(f, "`%s' tag method", name);
         break;
-      default:
-      {
-        char *filename;
-        int linedefined;
-        lua_funcinfo(func, &filename, &linedefined);
+      default: {
         if (linedefined == 0)
           fprintf(f, "main of %s", filename);
         else if (linedefined < 0)
           fprintf(f, "%s", filename);
         else
           fprintf(f, "function (%s:%d)", filename, linedefined);
+        filename = NULL;
       }
     }
     if ((currentline = lua_currentline(func)) > 0)
-      fprintf(f, "  at line %d", currentline);
+      fprintf(f, " at line %d", currentline);
+    if (filename)
+      fprintf(f, " [in file %s]", filename);
     fprintf(f, "\n");
   }
 }
@@ -591,54 +293,38 @@ void lua_printstack (FILE *f)
 
 static void errorfb (void)
 {
-  lua_Object o = lua_getparam(1);
-  char *s = lua_isstring(o) ? lua_getstring(o) : "(no messsage)";
-  fprintf(stderr, "lua: %s\n", s);
+  fprintf(stderr, "lua: %s\n", lua_getstring(lua_getparam(1)));
   lua_printstack(stderr);
 }
 
 
-/*
-** Open io library
-*/
+
+static struct luaL_reg iolib[] = {
+{"readfrom", io_readfrom},
+{"writeto",  io_writeto},
+{"appendto", io_appendto},
+{"read",     io_read},
+{"write",    io_write},
+{"execute",  io_execute},
+{"remove",   io_remove},
+{"rename",   io_rename},
+{"tmpname",   io_tmpname},
+{"getenv",   io_getenv},
+{"date",     io_date},
+{"exit",     io_exit},
+{"debug",    io_debug},
+{"print_stack", errorfb}
+};
+
 void iolib_open (void)
 {
- lua_register ("readfrom", io_readfrom);
- lua_register ("writeto",  io_writeto);
- lua_register ("appendto", io_appendto);
- lua_register ("read",     io_read);
- lua_register ("readuntil",io_readuntil);
- lua_register ("write",    io_write);
- lua_register ("execute",  io_execute);
- lua_register ("remove",   io_remove);
- lua_register ("ioerror",   io_errorno);
- lua_register ("getenv",   io_getenv);
- lua_register ("date",     io_date);
- lua_register ("exit",     io_exit);
- lua_register ("debug",    io_debug);
- lua_register ("print_stack", errorfb);
- lua_setfallback("error", errorfb);
+  lua_tagio = lua_newtag();
+  setfile(stdin, "_INPUT");
+  setfile(stdout, "_OUTPUT");
+  setfile(stdin, "_STDIN");
+  setfile(stdout, "_STDOUT");
+  setfile(stderr, "_STDERR");
+  luaL_openlib(iolib, (sizeof(iolib)/sizeof(iolib[0])));
+  lua_pushcfunction(errorfb);
+  lua_seterrormethod();
 }
-
-/*
-** Return user formatted time stamp
-*
-static void sys_localtime (void)
-{
- time_t t;
- struct tm *tm;
- lua_Object o = lua_getparam(1);
-
- time(&t); tm = localtime(&t);
- if (lua_isstring(o))
- {
-  char b[BUFSIZ];
-  if (strftime(b,sizeof(b),lua_getstring(o),tm)==0)
-   lua_pushstring(ctime(&t));
-  else
-   lua_pushstring(b);
- }
- else
-  lua_pushstring(ctime(&t));
-}
-*/

lex.c

@@ -1,47 +1,70 @@
-char *rcs_lex = "$Id: lex.c,v 2.27 1996/02/14 13:35:51 roberto Exp roberto $";
- 
+char *rcs_lex = "$Id: lex.c,v 3.4 1997/06/11 18:56:02 roberto Exp roberto $";
+
 
 #include <ctype.h>
 #include <string.h>
-#include <stdio.h>
 
-#include "mem.h"
+#include "auxlib.h"
+#include "luamem.h"
 #include "tree.h"
 #include "table.h"
 #include "lex.h"
 #include "inout.h"
 #include "luadebug.h"
 #include "parser.h"
-#include "ugly.h"
 
-#define MINBUFF 260
+#define MINBUFF 250
 
-#define next() { current = input(); }
-#define save(x) { *yytextLast++ = (x); }
-#define save_and_next()  { save(current); next(); }
+static int current;  /* look ahead character */
+static ZIO *lex_z;
 
-static int current;
-static char *yytext = NULL;
-static int textsize = 0;
-static char *yytextLast;
 
-static Input input;
+#define next() (current = zgetc(lex_z))
+#define save(x) (yytext[tokensize++] = (x))
+#define save_and_next()  (save(current), next())
 
-void lua_setinput (Input fn)
+
+#define MAX_IFS	5
+
+/* "ifstate" keeps the state of each nested $if the lexical is dealing with. */
+
+static struct {
+  int elsepart;  /* true if its in the $else part */
+  int condition;  /* true if $if condition is true */
+  int skip;  /* true if part must be skiped */
+} ifstate[MAX_IFS];
+
+static int iflevel;  /* level of nested $if's */
+
+
+void lua_setinput (ZIO *z)
 {
-  current = ' ';
-  input = fn;
-  if (yytext == NULL)
-  {
-    textsize = MINBUFF;
-    yytext = newvector(textsize, char);
-  }
+  current = '\n';
+  lua_linenumber = 0;
+  iflevel = 0;
+  ifstate[0].skip = 0;
+  ifstate[0].elsepart = 1;  /* to avoid a free $else */
+  lex_z = z;
 }
 
-char *lua_lasttext (void)
+
+static void luaI_auxsyntaxerror (char *s)
 {
-  *yytextLast = 0;
-  return yytext;
+  luaL_verror("%s;\n> at line %d in file %s",
+               s, lua_linenumber, lua_parsedfile);
+}
+
+static void luaI_auxsynterrbf (char *s, char *token)
+{
+  if (token[0] == 0)
+    token = "<eof>";
+  luaL_verror("%s;\n> last token read: \"%s\" at line %d in file %s",
+           s, token, lua_linenumber, lua_parsedfile);
+}
+
+void luaI_syntaxerror (char *s)
+{
+  luaI_auxsynterrbf(s, luaI_buffer(1));
 }
 
 
@@ -82,104 +105,197 @@ void luaI_addReserved (void)
 }
 
 
-static void growtext (void)
+/*
+** Pragma handling
+*/
+
+#define PRAGMASIZE	20
+
+static void skipspace (void)
 {
-  int size = yytextLast - yytext;
-  textsize *= 2;
-  yytext = growvector(yytext, textsize, char);
-  yytextLast = yytext + size;
+  while (current == ' ' || current == '\t') next();
 }
 
 
-static int read_long_string (void)
+static int checkcond (char *buff)
 {
-  int cont = 0;
-  int spaceleft = textsize - (yytextLast - yytext);
-  while (1)
-  {
-    if (spaceleft <= 2)  /* may read more than 1 char in one cicle */
-    {
-      growtext();
-      spaceleft = textsize - (yytextLast - yytext);
-    }
-    switch (current)
-    {
-      case EOF:
-      case 0:
-        return WRONGTOKEN;
-      case '[':
-        save_and_next(); spaceleft--;
-        if (current == '[')
-        {
-          cont++;
-          save_and_next(); spaceleft--;
-        }
-        continue; 
-      case ']':
-        save_and_next(); spaceleft--;
-        if (current == ']')
-        {
-          if (cont == 0) return STRING;
-          cont--;
-          save_and_next(); spaceleft--;
-        }
-        continue; 
-      case '\n':
-        lua_linenumber++;  /* goes through */
-      default:
-        save_and_next(); spaceleft--;
-    }
+  static char *opts[] = {"nil", "1"};
+  int i = luaI_findstring(buff, opts); 
+  if (i >= 0) return i;
+  else if (isalpha((unsigned char)buff[0]) || buff[0] == '_')
+    return luaI_globaldefined(buff);
+  else {
+    luaI_auxsynterrbf("invalid $if condition", buff);
+    return 0;  /* to avoid warnings */
   }
 }
 
 
+static void readname (char *buff)
+{
+  int i = 0;
+  skipspace();
+  while (isalnum((unsigned char)current) || current == '_') {
+    if (i >= PRAGMASIZE) {
+      buff[PRAGMASIZE] = 0;
+      luaI_auxsynterrbf("pragma too long", buff);
+    }
+    buff[i++] = current;
+    next();
+  }
+  buff[i] = 0;
+}
+
+
+static void inclinenumber (void);
+
+
+static void ifskip (void)
+{
+  while (ifstate[iflevel].skip) {
+    if (current == '\n')
+      inclinenumber();
+    else if (current == EOZ)
+      luaI_auxsyntaxerror("input ends inside a $if");
+    else next();
+  }
+}
+
+
+static void inclinenumber (void)
+{
+  static char *pragmas [] = 
+    {"debug", "nodebug", "endinput", "end", "ifnot", "if", "else", NULL};
+  next();  /* skip '\n' */
+  ++lua_linenumber;
+  if (current == '$') {  /* is a pragma? */
+    char buff[PRAGMASIZE+1];
+    int ifnot = 0;
+    int skip = ifstate[iflevel].skip;
+    next();  /* skip $ */
+    readname(buff);
+    switch (luaI_findstring(buff, pragmas)) {
+      case 0:  /* debug */
+        if (!skip) lua_debug = 1;
+        break;
+      case 1:  /* nodebug */
+        if (!skip) lua_debug = 0;
+        break;
+      case 2:  /* endinput */
+        if (!skip) {
+          current = EOZ;
+          iflevel = 0;  /* to allow $endinput inside a $if */
+        }
+        break;
+      case 3:  /* end */
+        if (iflevel-- == 0)
+          luaI_auxsyntaxerror("unmatched $endif");
+        break;
+      case 4:  /* ifnot */
+        ifnot = 1;
+        /* go through */
+      case 5:  /* if */
+        if (iflevel == MAX_IFS-1)
+          luaI_auxsyntaxerror("too many nested `$ifs'");
+        readname(buff);
+        iflevel++;
+        ifstate[iflevel].elsepart = 0;
+        ifstate[iflevel].condition = checkcond(buff) ? !ifnot : ifnot;
+        ifstate[iflevel].skip = skip || !ifstate[iflevel].condition;
+        break;
+      case 6:  /* else */
+        if (ifstate[iflevel].elsepart)
+          luaI_auxsyntaxerror("unmatched $else");
+        ifstate[iflevel].elsepart = 1;
+        ifstate[iflevel].skip =
+                    ifstate[iflevel-1].skip || ifstate[iflevel].condition;
+        break;
+      default:
+        luaI_auxsynterrbf("invalid pragma", buff);
+    }
+    skipspace();
+    if (current == '\n')  /* pragma must end with a '\n' ... */
+      inclinenumber();
+    else if (current != EOZ)  /* or eof */
+      luaI_auxsyntaxerror("invalid pragma format");
+    ifskip();
+  }
+}
+
+static int read_long_string (char *yytext, int buffsize)
+{
+  int cont = 0;
+  int tokensize = 2;  /* '[[' already stored */
+  while (1)
+  {
+    if (buffsize-tokensize <= 2) /* may read more than 1 char in one cicle */
+      yytext = luaI_buffer(buffsize *= 2);
+    switch (current)
+    {
+      case EOZ:
+        save(0);
+        return WRONGTOKEN;
+      case '[':
+        save_and_next();
+        if (current == '[')
+        {
+          cont++;
+          save_and_next();
+        }
+        continue;
+      case ']':
+        save_and_next();
+        if (current == ']')
+        {
+          if (cont == 0) goto endloop;
+          cont--;
+          save_and_next();
+        }
+        continue;
+      case '\n':
+        save('\n');
+        inclinenumber();
+        continue;
+      default:
+        save_and_next();
+    }
+  } endloop:
+  save_and_next();  /* pass the second ']' */
+  yytext[tokensize-2] = 0;  /* erases ']]' */
+  luaY_lval.vWord = luaI_findconstantbyname(yytext+2);
+  yytext[tokensize-2] = ']';  /* restores ']]' */
+  save(0);
+  return STRING;
+}
+
 int luaY_lex (void)
 {
-  float a;
   static int linelasttoken = 0;
+  double a;
+  int buffsize = MINBUFF;
+  char *yytext = luaI_buffer(buffsize);
+  yytext[1] = yytext[2] = yytext[3] = 0;
   if (lua_debug)
     luaI_codedebugline(linelasttoken);
   linelasttoken = lua_linenumber;
   while (1)
   {
-    yytextLast = yytext;
-#if 0
-    fprintf(stderr,"'%c' %d\n",current,current);
-#endif
+    int tokensize = 0;
     switch (current)
     {
-      case EOF:
-      case 0:
-       return 0;
-      case '\n': linelasttoken = ++lua_linenumber;
-      case ' ':
-      case '\r':  /* CR: to avoid problems with DOS/Windows */
-      case '\t':
+      case '\n':
+        inclinenumber();
+        linelasttoken = lua_linenumber;
+        continue;
+
+      case ' ': case '\t': case '\r':  /* CR: to avoid problems with DOS */
         next();
         continue;
 
-      case '$':
-	next();
-	while (isalnum(current) || current == '_')
-          save_and_next();
-        *yytextLast = 0;
-	if (strcmp(yytext, "debug") == 0)
-	{
-	  luaY_lval.vInt = 1;
-	  return DEBUG;
-        }
-	else if (strcmp(yytext, "nodebug") == 0)
-	{
-	  luaY_lval.vInt = 0;
-	  return DEBUG;
-        }
-	return WRONGTOKEN;
-
       case '-':
         save_and_next();
-        if (current != '-') return '-';  /* else goes through */
-      case '#':
-        do { next(); } while (current != '\n' && current != 0);
+        if (current != '-') return '-';
+        do { next(); } while (current != '\n' && current != EOZ);
         continue;
 
       case '[':
@@ -188,12 +304,7 @@ int luaY_lex (void)
         else
         {
           save_and_next();  /* pass the second '[' */
-          if (read_long_string() == WRONGTOKEN)
-            return WRONGTOKEN;
-          save_and_next();  /* pass the second ']' */
-          *(yytextLast-2) = 0;  /* erases ']]' */
-          luaY_lval.vWord = luaI_findconstantbyname(yytext+2);
-          return STRING;
+          return read_long_string(yytext, buffsize);
         }
 
       case '=':
@@ -220,21 +331,16 @@ int luaY_lex (void)
       case '\'':
       {
         int del = current;
-        int spaceleft = textsize - (yytextLast - yytext);
-        next();  /* skip the delimiter */
+        save_and_next();
         while (current != del)
         {
-          if (spaceleft <= 2) /* may read more than 1 char in one cicle */
-          {
-            growtext();
-            spaceleft = textsize - (yytextLast - yytext);
-          }
-          spaceleft--;
+          if (buffsize-tokensize <= 2) /* may read more than 1 char in one cicle */
+            yytext = luaI_buffer(buffsize *= 2);
           switch (current)
           {
-            case EOF:
-            case 0:
+            case EOZ:
             case '\n':
+              save(0);
               return WRONGTOKEN;
             case '\\':
               next();  /* do not save the '\' */
@@ -243,17 +349,19 @@ int luaY_lex (void)
                 case 'n': save('\n'); next(); break;
                 case 't': save('\t'); next(); break;
                 case 'r': save('\r'); next(); break;
-                case '\n': lua_linenumber++;  /* goes through */
-                default : save(current); next(); break;
+                case '\n': save('\n'); inclinenumber(); break;
+                default : save_and_next(); break;
               }
               break;
             default:
               save_and_next();
           }
         }
-        next();  /* skip the delimiter */
-        *yytextLast = 0;
-        luaY_lval.vWord = luaI_findconstantbyname(yytext);
+        next();  /* skip delimiter */
+        save(0);
+        luaY_lval.vWord = luaI_findconstantbyname(yytext+1);
+        tokensize--;
+        save(del); save(0);  /* restore delimiter */
         return STRING;
       }
 
@@ -272,8 +380,10 @@ int luaY_lex (void)
       case '_':
       {
         TaggedString *ts;
-        do { save_and_next(); } while (isalnum(current) || current == '_');
-        *yytextLast = 0;
+        do {
+          save_and_next();
+        } while (isalnum((unsigned char)current) || current == '_');
+        save(0);
         ts = lua_createstring(yytext);
         if (ts->marked > 2)
           return ts->marked;  /* reserved word */
@@ -287,9 +397,14 @@ int luaY_lex (void)
         if (current == '.')
         {
           save_and_next();
-          return CONC;
+          if (current == '.')
+          {
+            save_and_next();
+            return DOTS;   /* ... */
+          }
+          else return CONC;   /* .. */
         }
-        else if (!isdigit(current)) return '.';
+        else if (!isdigit((unsigned char)current)) return '.';
         /* current is a digit: goes through to number */
 	a=0.0;
         goto fraction;
@@ -297,53 +412,59 @@ int luaY_lex (void)
       case '0': case '1': case '2': case '3': case '4':
       case '5': case '6': case '7': case '8': case '9':
 	a=0.0;
-        do { a=10*a+current-'0'; save_and_next(); } while (isdigit(current));
-        if (current == '.') save_and_next();
-fraction:
-	{ float da=0.1;
-	  while (isdigit(current))
-	  {a+=(current-'0')*da; da/=10.0; save_and_next()};
+        do {
+          a=10.0*a+(current-'0');
+          save_and_next();
+        } while (isdigit((unsigned char)current));
+        if (current == '.') {
+          save_and_next();
+          if (current == '.')
+            luaI_syntaxerror(
+              "ambiguous syntax (decimal point x string concatenation)");
+        }
+      fraction:
+	{ double da=0.1;
+	  while (isdigit((unsigned char)current))
+	  {
+            a+=(current-'0')*da;
+            da/=10.0;
+            save_and_next();
+          }
           if (current == 'e' || current == 'E')
           {
 	    int e=0;
 	    int neg;
-	    float ea;
+	    double ea;
             save_and_next();
 	    neg=(current=='-');
             if (current == '+' || current == '-') save_and_next();
-            if (!isdigit(current)) return WRONGTOKEN;
-            do { e=10*e+current-'0'; save_and_next(); } while (isdigit(current));
-	    for (ea=neg?0.1:10.0; e>0; e>>=1) 
+            if (!isdigit((unsigned char)current)) {
+              save(0); return WRONGTOKEN; }
+            do {
+              e=10.0*e+(current-'0');
+              save_and_next();
+            } while (isdigit((unsigned char)current));
+	    for (ea=neg?0.1:10.0; e>0; e>>=1)
 	    {
 	      if (e & 1) a*=ea;
 	      ea*=ea;
 	    }
           }
           luaY_lval.vFloat = a;
+          save(0);
           return NUMBER;
         }
 
-      case U_and: case U_do: case U_else: case U_elseif: case U_end:
-      case U_function: case U_if: case U_local: case U_nil: case U_not:
-      case U_or: case U_repeat: case U_return: case U_then:
-      case U_until: case U_while:
-      {
-        int old = current;
-        next();
-        return reserved[old-U_and].token;
-      }
+      case EOZ:
+        save(0);
+        if (iflevel > 0)
+          luaI_syntaxerror("missing $endif");
+        return 0;
 
-      case U_eq:	next(); return EQ;
-      case U_le:	next(); return LE;
-      case U_ge:	next(); return GE;
-      case U_ne:	next(); return NE;
-      case U_sc:	next(); return CONC;
-
-      default: 		/* also end of file */
-      {
+      default:
         save_and_next();
         return yytext[0];
-      }
     }
   }
 }
+

lex.h

@@ -1,17 +1,16 @@
 /*
 ** lex.h
 ** TecCGraf - PUC-Rio
-** $Id: lex.h,v 1.1 1996/02/13 17:30:39 roberto Exp roberto $
+** $Id: lex.h,v 1.3 1996/11/08 12:49:35 roberto Exp roberto $
 */
 
 #ifndef lex_h
 #define lex_h
 
+#include "zio.h"
 
-typedef int  (*Input) (void);
-
-void    lua_setinput   (Input fn);
-char   *lua_lasttext   (void);
+void    lua_setinput   (ZIO *z);
+void luaI_syntaxerror (char *s);
 int     luaY_lex (void);
 void luaI_addReserved (void);
 

lua.c

@@ -3,49 +3,100 @@
 ** Linguagem para Usuarios de Aplicacao
 */
 
-char *rcs_lua="$Id: lua.c,v 1.6 1995/10/23 13:54:11 roberto Exp roberto $";
+char *rcs_lua="$Id: lua.c,v 1.17 1997/06/18 21:20:45 roberto Exp roberto $";
 
 #include <stdio.h>
 #include <string.h>
 
 #include "lua.h"
+#include "auxlib.h"
 #include "lualib.h"
 
-static int lua_argc;
-static char **lua_argv;
 
-/*
-** although this function is POSIX, there is no standard header file that
-** defines it
-*/
-int isatty (int fd);
+#ifdef _POSIX_SOURCE
+#include <unistd.h>
+#else
+#define isatty(x)       (x==0)  /* assume stdin is a tty */
+#endif
 
-/*
-%F Allow Lua code to access argv strings.
-%i Receive from Lua the argument number (starting with 1).
-%o Return to Lua the argument, or nil if it does not exist.
-*/
-static void lua_getargv (void)
+
+#define DEBUG	0
+
+static void testC (void)
 {
- lua_Object lo = lua_getparam(1);
- if (!lua_isnumber(lo))
-  lua_pushnil();
- else
- {
-  int n = (int)lua_getnumber(lo);
-  if (n < 1 || n > lua_argc) lua_pushnil();
-  else                       lua_pushstring(lua_argv[n]);
- }
+#if DEBUG
+#define getnum(s)	((*s++) - '0')
+#define getname(s)	(nome[0] = *s++, nome)
+
+  static int locks[10];
+  lua_Object reg[10];
+  char nome[2];
+  char *s = luaL_check_string(1);
+  nome[1] = 0;
+  while (1) {
+    switch (*s++) {
+      case '0': case '1': case '2': case '3': case '4':
+      case '5': case '6': case '7': case '8': case '9':
+        lua_pushnumber(*(s-1) - '0');
+        break;
+
+      case 'c': reg[getnum(s)] = lua_createtable(); break;
+
+      case 'P': reg[getnum(s)] = lua_pop(); break;
+
+      case 'g': { int n = getnum(s); reg[n] = lua_getglobal(getname(s)); break; }
+
+      case 'G': { int n = getnum(s);
+                  reg[n] = lua_rawgetglobal(getname(s));
+                  break;
+                }
+
+      case 'l': locks[getnum(s)] = lua_ref(1); break;
+      case 'L': locks[getnum(s)] = lua_ref(0); break;
+
+      case 'r': { int n = getnum(s); reg[n] = lua_getref(locks[getnum(s)]); break; }
+
+      case 'u': lua_unref(locks[getnum(s)]); break;
+
+      case 'p': { int n = getnum(s); reg[n] = lua_getparam(getnum(s)); break; }
+
+      case '=': lua_setglobal(getname(s)); break;
+
+      case 's': lua_pushstring(getname(s)); break;
+
+      case 'o': lua_pushobject(reg[getnum(s)]); break;
+
+      case 'f': lua_call(getname(s)); break;
+
+      case 'i': reg[getnum(s)] = lua_gettable(); break;
+
+      case 'I': reg[getnum(s)] = lua_rawgettable(); break;
+
+      case 't': lua_settable(); break;
+
+      case 'T': lua_rawsettable(); break;
+
+      default: luaL_verror("unknown command in `testC': %c", *(s-1));
+
+    }
+  if (*s == 0) return;
+  if (*s++ != ' ') lua_error("missing ` ' between commands in `testC'");
+  }
+#else
+  lua_error("`testC' not active");
+#endif
 }
 
 
 static void manual_input (void)
 {
-  if (isatty(fileno(stdin)))
-  {
-   char buffer[250];
-   while (gets(buffer) != 0)
-     lua_dostring(buffer);
+  if (isatty(0)) {
+    char buffer[250];
+    while (fgets(buffer, sizeof(buffer), stdin) != 0) {
+      lua_beginblock();
+      lua_dostring(buffer);
+      lua_endblock();
+    }
   }
   else
     lua_dofile(NULL);  /* executes stdin as a file */
@@ -54,39 +105,37 @@ static void manual_input (void)
 
 int main (int argc, char *argv[])
 {
- int i;
- int result = 0;
- iolib_open ();
- strlib_open ();
- mathlib_open ();
-
- lua_register("argv", lua_getargv);
-
- if (argc < 2)
-   manual_input();
- else
- {
-  for (i=1; i<argc; i++)
-   if (strcmp(argv[i], "--") == 0)
-   {
-    lua_argc = argc-i-1;
-    lua_argv = argv+i;
-    break;
-   }
-  for (i=1; i<argc; i++)
-  {
-   if (strcmp(argv[i], "--") == 0)
-    break;
-   else if (strcmp(argv[i], "-") == 0)
+  int i;
+  int result = 0;
+  iolib_open ();
+  strlib_open ();
+  mathlib_open ();
+  lua_register("testC", testC);
+  if (argc < 2)
     manual_input();
-   else if (strcmp(argv[i], "-v") == 0)
-    printf("%s  %s\n(written by %s)\n\n",
-            LUA_VERSION, LUA_COPYRIGHT, LUA_AUTHORS);
-   else
-    result = lua_dofile (argv[i]);
+  else for (i=1; i<argc; i++) {
+    if (strcmp(argv[i], "-") == 0)
+      manual_input();
+    else if (strcmp(argv[i], "-v") == 0)
+      printf("%s  %s\n(written by %s)\n\n",
+             LUA_VERSION, LUA_COPYRIGHT, LUA_AUTHORS);
+    else if ((strcmp(argv[i], "-e") == 0 && i++) || strchr(argv[i], '=')) {
+      if (lua_dostring(argv[i]) != 0) {
+        fprintf(stderr, "lua: error running argument `%s'\n", argv[i]);
+        return 1;
+      }
+    }
+    else {
+      result = lua_dofile (argv[i]);
+      if (result) {
+        if (result == 2) {
+          fprintf(stderr, "lua: cannot execute file ");
+          perror(argv[i]);
+        }
+        return 1;
+      }
+    }
   }
- }
- return result;
+  return result;
 }
 
-

lua.h

@@ -1,109 +1,141 @@
 /*
-** LUA - Linguagem para Usuarios de Aplicacao
-** Grupo de Tecnologia em Computacao Grafica
-** TeCGraf - PUC-Rio
-** $Id: lua.h,v 3.22 1996/02/12 18:32:09 roberto Exp roberto $
+** LUA - An Extensible Extension Language
+** TeCGraf: Grupo de Tecnologia em Computacao Grafica, PUC-Rio, Brazil
+** e-mail: lua@tecgraf.puc-rio.br
+** $Id: lua.h,v 4.10 1997/06/19 18:03:04 roberto Exp roberto $
 */
 
 
 #ifndef lua_h
 #define lua_h
 
-#define LUA_VERSION	"Lua 2.3 (beta)"
-#define LUA_COPYRIGHT	"Copyright (C) 1994, 1995 TeCGraf"
+#define LUA_VERSION	"Lua 3.0"
+#define LUA_COPYRIGHT	"Copyright (C) 1994-1997 TeCGraf"
 #define LUA_AUTHORS 	"W. Celes, R. Ierusalimschy & L. H. de Figueiredo"
 
 
-/* Private Part */
- 
-typedef enum
-{
- LUA_T_NIL	= -1,
- LUA_T_NUMBER	= -2,
- LUA_T_STRING	= -3,
- LUA_T_ARRAY	= -4,
- LUA_T_FUNCTION	= -5,
- LUA_T_CFUNCTION= -6,
- LUA_T_MARK	= -7,
- LUA_T_CMARK	= -8,
- LUA_T_LINE	= -9,
- LUA_T_USERDATA = 0
-} lua_Type;
- 
-
-/* Public Part */
-
 #define LUA_NOOBJECT  0
 
+#define LUA_ANYTAG    (-1)
+
 typedef void (*lua_CFunction) (void);
 typedef unsigned int lua_Object;
 
-lua_Object     lua_setfallback		(char *name, lua_CFunction fallback);
+lua_Object     lua_settagmethod	(int tag, char *event);  /* In: new method */
+lua_Object     lua_gettagmethod	(int tag, char *event);
+lua_Object     lua_seterrormethod (void);  /* In: new method */
+
+int            lua_newtag		(void);
+void           lua_settag		(int tag); /* In: object */
 
 void           lua_error		(char *s);
-int            lua_dofile 		(char *filename);
-int            lua_dostring 		(char *string);
-int            lua_callfunction		(lua_Object function);
-int	       lua_call			(char *funcname);
+int            lua_dofile 		(char *filename); /* Out: returns */
+int            lua_dostring 		(char *string); /* Out: returns */
+int            lua_callfunction		(lua_Object f);
+					  /* In: parameters; Out: returns */
 
 void	       lua_beginblock		(void);
 void	       lua_endblock		(void);
 
-lua_Object     lua_getparam 		(int number);
-#define	       lua_getresult(_)		lua_getparam(_)
+lua_Object     lua_lua2C 		(int number);
+#define	       lua_getparam(_)		lua_lua2C(_)
+#define	       lua_getresult(_)		lua_lua2C(_)
+
+int            lua_isnil                (lua_Object object);
+int            lua_istable              (lua_Object object);
+int            lua_isuserdata           (lua_Object object);
+int            lua_iscfunction          (lua_Object object);
+int            lua_isnumber             (lua_Object object);
+int            lua_isstring             (lua_Object object);
+int            lua_isfunction           (lua_Object object);
 
 float          lua_getnumber 		(lua_Object object);
 char          *lua_getstring 		(lua_Object object);
 lua_CFunction  lua_getcfunction 	(lua_Object object);
-void          *lua_getuserdata  	(lua_Object object);
+void	      *lua_getuserdata		(lua_Object object);
+
 
 void 	       lua_pushnil 		(void);
 void           lua_pushnumber 		(float n);
 void           lua_pushstring 		(char *s);
 void           lua_pushcfunction	(lua_CFunction fn);
-void           lua_pushusertag     	(void *u, int tag);
+void           lua_pushusertag          (void *u, int tag);
 void           lua_pushobject       	(lua_Object object);
 
+lua_Object     lua_pop			(void);
+
 lua_Object     lua_getglobal 		(char *name);
-void           lua_storeglobal		(char *name);
+lua_Object     lua_rawgetglobal		(char *name);
+void           lua_setglobal		(char *name); /* In: value */
+void           lua_rawsetglobal		(char *name); /* In: value */
 
-void           lua_storesubscript	(void);
-lua_Object     lua_getsubscript         (void);
+void           lua_settable	(void); /* In: table, index, value */
+void           lua_rawsettable	(void); /* In: table, index, value */
+lua_Object     lua_gettable 		(void); /* In: table, index */
+lua_Object     lua_rawgettable		(void); /* In: table, index */
 
-int            lua_type 		(lua_Object object);
+int            lua_tag			(lua_Object object);
 
-int	       lua_lock			(void);
-lua_Object     lua_getlocked		(int ref);
-void	       lua_pushlocked		(int ref);
-void	       lua_unlock		(int ref);
+
+int            lua_ref			(int lock); /* In: value */
+lua_Object     lua_getref		(int ref);
+void	       lua_unref		(int ref);
 
 lua_Object     lua_createtable		(void);
 
+long	       lua_collectgarbage	(long limit);
 
+
+/* =============================================================== */
 /* some useful macros */
 
-#define lua_lockobject(o)  (lua_pushobject(o), lua_lock())
+#define lua_call(name)		lua_callfunction(lua_getglobal(name))
 
-#define lua_register(n,f)	(lua_pushcfunction(f), lua_storeglobal(n))
+#define lua_pushref(ref)	lua_pushobject(lua_getref(ref))
 
-#define lua_pushuserdata(u)     lua_pushusertag(u, LUA_T_USERDATA)
+#define lua_refobject(o,l)	(lua_pushobject(o), lua_ref(l))
 
-#define lua_isnil(_)            (lua_type(_)==LUA_T_NIL)
-#define lua_isnumber(_)         (lua_type(_)==LUA_T_NUMBER)
-#define lua_isstring(_)         (lua_type(_)==LUA_T_STRING)
-#define lua_istable(_)          (lua_type(_)==LUA_T_ARRAY)
-#define lua_isfunction(_)       (lua_type(_)==LUA_T_FUNCTION)
-#define lua_iscfunction(_)      (lua_type(_)==LUA_T_CFUNCTION)
-#define lua_isuserdata(_)       (lua_type(_)>=LUA_T_USERDATA)
+#define lua_register(n,f)	(lua_pushcfunction(f), lua_setglobal(n))
+
+#define lua_pushuserdata(u)     lua_pushusertag(u, 0)
 
 
-/* for compatibility with old versions. Avoid using these macros */
+
+
+/* ========================================================================== 
+** for compatibility with old versions. Avoid using these macros/functions
+** If your program does not use any of these, define LUA_COMPAT2_5 to 0
+*/
+
+#ifndef LUA_COMPAT2_5
+#define LUA_COMPAT2_5	1
+#endif
+
+
+#if LUA_COMPAT2_5
+
+
+lua_Object     lua_setfallback		(char *event, lua_CFunction fallback);
+
+#define lua_storeglobal		lua_setglobal
+#define lua_type		lua_tag
+
+#define lua_lockobject(o)  lua_refobject(o,1)
+#define	lua_lock() lua_ref(1)
+#define lua_getlocked lua_getref
+#define	lua_pushlocked lua_pushref
+#define	lua_unlock lua_unref
 
 #define lua_pushliteral(o)  lua_pushstring(o)
 
-#define lua_getindexed(o,n) (lua_pushobject(o), lua_pushnumber(n), lua_getsubscript())
-#define lua_getfield(o,f)   (lua_pushobject(o), lua_pushliteral(f), lua_getsubscript())
+#define lua_getindexed(o,n) (lua_pushobject(o), lua_pushnumber(n), lua_gettable())
+#define lua_getfield(o,f)   (lua_pushobject(o), lua_pushstring(f), lua_gettable())
 
 #define lua_copystring(o) (strdup(lua_getstring(o)))
 
+#define lua_getsubscript  lua_gettable
+#define lua_storesubscript  lua_settable
+
+#endif
+
 #endif

lua.stx

@@ -1,12 +1,13 @@
 %{
 
-char *rcs_luastx = "$Id: lua.stx,v 3.31 1996/02/13 17:30:39 roberto Exp roberto $";
+char *rcs_luastx = "$Id: lua.stx,v 3.46 1997/03/31 14:19:01 roberto Exp roberto $";
 
 #include <stdio.h>
 #include <stdlib.h>
+#include <string.h>
 
 #include "luadebug.h"
-#include "mem.h"
+#include "luamem.h"
 #include "lex.h"
 #include "opcode.h"
 #include "hash.h"
@@ -31,7 +32,7 @@ int yyparse (void);
 #endif
 static int   maxcode;
 static int   maxmain;
-static Long   maxcurr;  /* to allow maxcurr *= 2 without overflow */
+static int   maxcurr;
 static Byte  *funcCode = NULL;
 static Byte **initcode;
 static Byte  *basepc;
@@ -49,8 +50,6 @@ static TaggedString *localvar[MAXLOCALS];  /* store local variable names */
 static int     nlocalvar=0;	     /* number of local variables */
 
 #define MAXFIELDS FIELDS_PER_FLUSH*2
-static Word    fields[MAXFIELDS];     /* fieldnames to be flushed */
-static int     nfields=0;
 
 int lua_debug = 0;
 
@@ -58,81 +57,55 @@ int lua_debug = 0;
 
 static void yyerror (char *s)
 {
- char msg[256];
- char *token = lua_lasttext();
- if (token[0] == 0)
-   token = "<eof>";
- sprintf (msg,"%s; last token read: \"%s\" at line %d in file `%s'",
-          s, token, lua_linenumber, lua_parsedfile);
- lua_error (msg);
+  luaI_syntaxerror(s);
+}
+
+static void check_space (int i)
+{
+  if (pc+i>maxcurr-1)  /* 1 byte free to code HALT of main code */
+    maxcurr = growvector(&basepc, maxcurr, Byte, codeEM, MAX_INT);
 }
 
 static void code_byte (Byte c)
 {
- if (pc>maxcurr-2)  /* 1 byte free to code HALT of main code */
- {
-  if (maxcurr >= MAX_INT)
-    yyerror("code size overflow");
-  maxcurr *= 2;
-  if (maxcurr >= MAX_INT)
-    maxcurr = MAX_INT;
-  basepc = growvector(basepc, maxcurr, Byte);
- }
+ check_space(1);
  basepc[pc++] = c;
 }
 
 static void code_word (Word n)
 {
- CodeWord code;
- code.w = n;
- code_byte(code.m.c1);
- code_byte(code.m.c2);
+  check_space(sizeof(Word));
+  memcpy(basepc+pc, &n, sizeof(Word));
+  pc += sizeof(Word);
 }
 
-static void code_float (float n)
+static void code_float (real n)
 {
- CodeFloat code;
- code.f = n;
- code_byte(code.m.c1);
- code_byte(code.m.c2);
- code_byte(code.m.c3);
- code_byte(code.m.c4);
+  check_space(sizeof(real));
+  memcpy(basepc+pc, &n, sizeof(real));
+  pc += sizeof(real);
 }
 
 static void code_code (TFunc *tf)
 {
- CodeCode code;
- code.tf = tf;
- code_byte(code.m.c1);
- code_byte(code.m.c2);
- code_byte(code.m.c3);
- code_byte(code.m.c4);
+  check_space(sizeof(TFunc *));
+  memcpy(basepc+pc, &tf, sizeof(TFunc *));
+  pc += sizeof(TFunc *);
 }
 
-static void code_word_at (Byte *p, Word n)
+static void code_word_at (Byte *p, int n)
 {
- CodeWord code;
- code.w = n;
- *p++ = code.m.c1;
- *p++ = code.m.c2;
-}
-
-static void push_field (Word name)
-{
-  if (nfields < MAXFIELDS)
-    fields[nfields++] = name;
-  else
-   yyerror ("too many fields in nested constructors");
+  Word w = n;
+  if (w != n)
+    yyerror("block too big");
+  memcpy(p, &w, sizeof(Word));
 }
 
 static void flush_record (int n)
 {
-  int i;
   if (n == 0) return;
-  code_byte(STORERECORD);
+  code_byte(STOREMAP);
   code_byte(n);
-  for (i=0; i<n; i++)
-    code_word(fields[--nfields]);
 }
 
 static void flush_list (int m, int n)
@@ -175,11 +148,22 @@ static void add_varbuffer (Long var)
   yyerror ("variable buffer overflow");
 }
 
+static void code_string (Word w)
+{
+  code_byte(PUSHSTRING);
+  code_word(w);
+}
+
+static void code_constant (TaggedString *s)
+{
+  code_string(luaI_findconstant(s));
+}
+
 static void code_number (float f)
 { 
-  Word i = (Word)f;
-  if (f == (float)i)  /* f has an (short) integer value */
-  {
+  Word i;
+  if (f >= 0 && f <= (float)MAX_WORD && (float)(i=(Word)f) == f) {
+   /* f has an (short) integer value */
    if (i <= 2) code_byte(PUSH0 + i);
    else if (i <= 255)
    {
@@ -327,6 +311,19 @@ static void adjust_mult_assign (int vars, Long exps, int temps)
     lua_codeadjust(temps);
 }
 
+static int close_parlist (int dots)
+{
+  if (!dots)
+    lua_codeadjust(0);
+  else
+  {
+    code_byte(VARARGS);
+    code_byte(nlocalvar);
+    add_localvar(luaI_createfixedstring("arg"));
+  }
+  return lua_linenumber;
+}
+
 static void storesinglevar (Long v)
 {
  if (v > 0)		/* global var */
@@ -423,7 +420,7 @@ void lua_parse (TFunc *tf)
  TaggedString *pTStr;
 }
 
-%start functionlist
+%start chunk
 
 %token WRONGTOKEN
 %token NIL
@@ -431,10 +428,10 @@ void lua_parse (TFunc *tf)
 %token RETURN
 %token LOCAL
 %token FUNCTION
+%token DOTS
 %token <vFloat> NUMBER
 %token <vWord>  STRING
 %token <pTStr>  NAME 
-%token <vInt>   DEBUG
 
 %type <vLong> PrepJump
 %type <vLong> exprlist, exprlist1  /* if > 0, points to function return
@@ -445,7 +442,7 @@ void lua_parse (TFunc *tf)
 %type <vInt>  fieldlist, localdeclist, decinit
 %type <vInt>  ffieldlist, ffieldlist1, semicolonpart
 %type <vInt>  lfieldlist, lfieldlist1
-%type <vInt>  parlist
+%type <vInt>  parlist, parlist1, par
 %type <vLong> var, singlevar, funcname
 %type <pFunc> body
 
@@ -460,15 +457,12 @@ void lua_parse (TFunc *tf)
 
 %% /* beginning of rules section */
 
+chunk	: chunklist ret ;
 
-functionlist : /* empty */
-	     | functionlist globalstat
-	     | functionlist function
-	     ;
-
-globalstat   : stat sc
-	     | setdebug
-	     ;
+chunklist : /* empty */
+	  | chunklist stat sc
+	  | chunklist function
+	  ;
 
 function     : FUNCTION funcname body 	 
 	       { 
@@ -481,11 +475,10 @@ function     : FUNCTION funcname body
 funcname	: var { $$ =$1; init_func(); }
 		| varexp ':' NAME
 	{
-	  code_byte(PUSHSTRING);
-	  code_word(luaI_findconstant($3));
+	  code_constant($3);
 	  $$ = 0;  /* indexed variable */
 	  init_func();
-	  add_localvar(lua_constcreate("self"));
+	  add_localvar(luaI_createfixedstring("self"));
 	}
 		;
 
@@ -496,7 +489,6 @@ body :  '(' parlist ')' block END
           luaI_initTFunc($$);
 	  $$->size = pc;
 	  $$->code = newvector(pc, Byte);
-	  $$->fileName = lua_parsedfile;
 	  $$->lineDefined = $2;
 	  memcpy($$->code, basepc, pc*sizeof(Byte));
           if (lua_debug)
@@ -544,7 +536,7 @@ stat   : IF expr1 THEN PrepJump block PrepJump elsepart END
 	  lua_codeadjust (0);
 	}
        } 
-       | functioncall
+       | functioncall {;}
        | LOCAL localdeclist decinit
 	{ nlocalvar += $2;
 	  adjust_mult_assign($2, $3, 0);
@@ -585,6 +577,7 @@ PrepJump : /* empty */
 	  code_byte(0);		/* open space */
 	  code_word (0);
          }
+	 ;
 	   
 expr1	 : expr { adjust_functioncall($1, 1); }
 	 ;
@@ -608,9 +601,8 @@ expr :  '(' expr ')'  { $$ = $2; }
      |  NUMBER          { code_number($1); $$ = 0; }
      |  STRING
      {
-      code_byte(PUSHSTRING);
-      code_word($1);
-      $$ = 0;
+       code_string($1);
+       $$ = 0;
      }
      |	NIL		{code_byte(PUSHNIL); $$ = 0; }
      |  functioncall    { $$ = $1; }
@@ -679,13 +671,22 @@ exprlist1 :  expr	{ if ($1 != 0) $$ = $1; else $$ = -1; }
 	}
 	  ;
 
-parlist  :	/* empty */ { lua_codeadjust(0); $$ = lua_linenumber; }
-	  |	parlist1    { lua_codeadjust(0); $$ = lua_linenumber; }
+parlist  :	/* empty */ { $$ = close_parlist(0); }
+	  |	parlist1    { $$ = close_parlist($1); }
 	  ;
 		
-parlist1 :	NAME		  { add_localvar($1); }
-	  |	parlist1 ',' NAME { add_localvar($3); }
+parlist1 :	par		  { $$ = $1; }
+	  |	parlist1 ',' par
+	{
+	  if ($1)
+            lua_error("invalid parameter list");
+          $$ = $3;
+	}
 	  ;
+
+par : NAME	{ add_localvar($1); $$ = 0; }
+    | DOTS	{ $$ = 1; }
+    ;
 		
 fieldlist  : lfieldlist
   	     { flush_list($1/FIELDS_PER_FLUSH, $1%FIELDS_PER_FLUSH); }
@@ -717,12 +718,13 @@ ffieldlist1 : ffield			{$$=1;}
 		}
 	   ; 
 
-ffield      : NAME '=' expr1 
-	      { 
-	       push_field(luaI_findconstant($1));
-	      }
+ffield      : ffieldkey '=' expr1
            ;
 
+ffieldkey   : '[' expr1 ']'
+	    | NAME { code_constant($1); }
+	    ;
+
 lfieldlist  : /* empty */ { $$ = 0; }
 	    | lfieldlist1 lastcomma { $$ = $1; }
 	    ;
@@ -756,9 +758,8 @@ var	  :	singlevar { $$ = $1; }
 	  }
 	  |	varexp '.' NAME
 	  {
-	   code_byte(PUSHSTRING);
-	   code_word(luaI_findconstant($3));
-	   $$ = 0;		/* indexed variable */
+	    code_constant($3);
+	    $$ = 0;		/* indexed variable */
 	  }
 	  ;
 		
@@ -787,234 +788,4 @@ decinit	  : /* empty */  { $$ = 0; }
 	  | '=' exprlist1 { $$ = $2; }
 	  ;
 	  
-setdebug  : DEBUG  { lua_debug = $1; }
-	  ;
-
 %%
-
-#if LISTING
-
-static void PrintCode (Byte *code, Byte *end)
-{
- Byte *p = code;
- printf ("\n\nCODE\n");
- while (p != end)
- {
-  switch ((OpCode)*p)
-  {
-   case PUSHNIL:	printf ("%d    PUSHNIL\n", (p++)-code); break;
-   case PUSH0: case PUSH1: case PUSH2:
-    			printf ("%d    PUSH%c\n", p-code, *p-PUSH0+'0');
-    			p++;
-   			break;
-   case PUSHBYTE:
-    			printf ("%d    PUSHBYTE   %d\n", p-code, *(p+1));
-    			p+=2;
-   			break;
-   case PUSHWORD:
-                        {
-			 CodeWord c;
-			 int n = p-code;
-			 p++;
-			 get_word(c,p);
-    			 printf ("%d    PUSHWORD   %d\n", n, c.w);
-			}
-   			break;
-   case PUSHFLOAT:
-			{
-			 CodeFloat c;
-			 int n = p-code;
-			 p++;
-			 get_float(c,p);
-    			 printf ("%d    PUSHFLOAT  %f\n", n, c.f);
-			}
-   			break;
-   case PUSHSTRING:
-    			{
-			 CodeWord c;
-			 int n = p-code;
-			 p++;
-			 get_word(c,p);
-    			 printf ("%d    PUSHSTRING   %d\n", n, c.w);
-			}
-   			break;
-   case PUSHFUNCTION:
-			{
-			 CodeCode c;
-			 int n = p-code;
-			 p++;
-			 get_code(c,p);
-			 printf ("%d    PUSHFUNCTION  %p\n", n, c.tf);
-			}
-			break;
-
-   case PUSHLOCAL0: case PUSHLOCAL1: case PUSHLOCAL2: case PUSHLOCAL3:
-   case PUSHLOCAL4: case PUSHLOCAL5: case PUSHLOCAL6: case PUSHLOCAL7:
-   case PUSHLOCAL8: case PUSHLOCAL9:
-    			printf ("%d    PUSHLOCAL%c\n", p-code, *p-PUSHLOCAL0+'0');
-    			p++;
-   			break;
-   case PUSHLOCAL:	printf ("%d    PUSHLOCAL   %d\n", p-code, *(p+1));
-    			p+=2;
-   			break;
-   case PUSHGLOBAL:
-    			{
-			 CodeWord c;
-			 int n = p-code;
-			 p++;
-			 get_word(c,p);
-    			 printf ("%d    PUSHGLOBAL   %d\n", n, c.w);
-			}
-   			break;
-   case PUSHINDEXED:    printf ("%d    PUSHINDEXED\n", (p++)-code); break;
-   case STORELOCAL0: case STORELOCAL1: case STORELOCAL2: case STORELOCAL3:
-   case STORELOCAL4: case STORELOCAL5: case STORELOCAL6: case STORELOCAL7:
-   case STORELOCAL8: case STORELOCAL9:
-    			printf ("%d    STORELOCAL%c\n", p-code, *p-STORELOCAL0+'0');
-    			p++;
-   			break;
-   case STORELOCAL:
-    			printf ("%d    STORELOCAL   %d\n", p-code, *(p+1));
-    			p+=2;
-   			break;
-   case STOREGLOBAL:
-    			{
-			 CodeWord c;
-			 int n = p-code;
-			 p++;
-			 get_word(c,p);
-    			 printf ("%d    STOREGLOBAL   %d\n", n, c.w);
-			}
-   			break;
-   case PUSHSELF:
-    			{
-			 CodeWord c;
-			 int n = p-code;
-			 p++;
-			 get_word(c,p);
-    			 printf ("%d    PUSHSELF   %d\n", n, c.w);
-			}
-			break;
-   case STOREINDEXED0:  printf ("%d    STOREINDEXED0\n", (p++)-code); break;
-   case STOREINDEXED:   printf ("%d    STOREINDEXED   %d\n", p-code, *(p+1));
-    			p+=2;
-   			break;
-   case STORELIST0:
-	printf("%d      STORELIST0  %d\n", p-code, *(p+1));
-        p+=2+;
-        break;
-   case STORELIST:
-	printf("%d      STORELIST  %d %d\n", p-code, *(p+1), *(p+2));
-        p+=3;
-        break;
-   case STORERECORD:
-       printf("%d      STORERECORD  %d\n", p-code, *(p+1));
-       p += *p*sizeof(Word) + 2;
-       break;
-   case ADJUST0: printf ("%d    ADJUST0\n", (p++)-code); break;
-   case ADJUST:
-    			printf ("%d    ADJUST   %d\n", p-code, *(p+1));
-    			p+=2;
-   			break;
-   case CREATEARRAY:	
-    {
-      CodeWord c;
-      int n = p-code;
-      p++;
-      get_word(c,p);
-      printf ("%d    CREATEARRAY %d\n", n, c.w);
-      break;
-    }
-   case EQOP:       	printf ("%d    EQOP\n", (p++)-code); break;
-   case LTOP:       	printf ("%d    LTOP\n", (p++)-code); break;
-   case LEOP:       	printf ("%d    LEOP\n", (p++)-code); break;
-   case ADDOP:       	printf ("%d    ADDOP\n", (p++)-code); break;
-   case SUBOP:       	printf ("%d    SUBOP\n", (p++)-code); break;
-   case MULTOP:      	printf ("%d    MULTOP\n", (p++)-code); break;
-   case DIVOP:       	printf ("%d    DIVOP\n", (p++)-code); break;
-   case POWOP:       	printf ("%d    POWOP\n", (p++)-code); break;
-   case CONCOP:       	printf ("%d    CONCOP\n", (p++)-code); break;
-   case MINUSOP:       	printf ("%d    MINUSOP\n", (p++)-code); break;
-   case NOTOP:       	printf ("%d    NOTOP\n", (p++)-code); break;
-   case ONTJMP:	   
-    			{
-			 CodeWord c;
-			 int n = p-code;
-			 p++;
-			 get_word(c,p);
-    			 printf ("%d    ONTJMP  %d\n", n, c.w);
-			}
-   			break;
-   case ONFJMP:	   
-    			{
-			 CodeWord c;
-			 int n = p-code;
-			 p++;
-			 get_word(c,p);
-    			 printf ("%d    ONFJMP  %d\n", n, c.w);
-			}
-   			break;
-   case JMP:	   
-    			{
-			 CodeWord c;
-			 int n = p-code;
-			 p++;
-			 get_word(c,p);
-    			 printf ("%d    JMP  %d\n", n, c.w);
-			}
-   			break;
-   case UPJMP:
-    			{
-			 CodeWord c;
-			 int n = p-code;
-			 p++;
-			 get_word(c,p);
-    			 printf ("%d    UPJMP  %d\n", n, c.w);
-			}
-   			break;
-   case IFFJMP:
-    			{
-			 CodeWord c;
-			 int n = p-code;
-			 p++;
-			 get_word(c,p);
-    			 printf ("%d    IFFJMP  %d\n", n, c.w);
-			}
-   			break;
-   case IFFUPJMP:
-    			{
-			 CodeWord c;
-			 int n = p-code;
-			 p++;
-			 get_word(c,p);
-    			 printf ("%d    IFFUPJMP  %d\n", n, c.w);
-			}
-   			break;
-   case POP:       	printf ("%d    POP\n", (p++)-code); break;
-   case CALLFUNC:
-	printf ("%d    CALLFUNC %d %d\n", p-code, *(p+1), *(p+2));
-	p+=3;
-	break;
-   case RETCODE0: printf ("%d    RETCODE0\n", (p++)-code); break;
-   case RETCODE:
-    			printf ("%d    RETCODE   %d\n", p-code, *(p+1));
-    			p+=2;
-   			break;
-   case SETLINE:
-                        {
-                         CodeWord c;
-                         int n = p-code;
-                         p++;
-                         get_word(c,p);
-                         printf ("%d    SETLINE  %d\n", n, c.w);
-                        }
-                        break;
-
-   default:		printf ("%d    Cannot happen: code %d\n", p-code, *p));
-                        p+=1;
-                        break;
-  }
- }
-}
-#endif
-

luadebug.h

@@ -2,7 +2,7 @@
 ** LUA - Linguagem para Usuarios de Aplicacao
 ** Grupo de Tecnologia em Computacao Grafica
 ** TeCGraf - PUC-Rio
-** $Id: luadebug.h,v 1.4 1996/02/07 18:10:27 roberto Exp roberto $
+** $Id: luadebug.h,v 1.5 1996/02/08 17:03:20 roberto Exp roberto $
 */
 
 
@@ -20,12 +20,12 @@ lua_Function lua_stackedfunction (int level);
 void lua_funcinfo (lua_Object func, char **filename, int *linedefined);
 int lua_currentline (lua_Function func);
 char *lua_getobjname (lua_Object o, char **name);
-lua_LHFunction lua_setlinehook (lua_LHFunction hook);
-lua_CHFunction lua_setcallhook (lua_CHFunction hook);
 
 lua_Object lua_getlocal (lua_Function func, int local_number, char **name);
 int lua_setlocal (lua_Function func, int local_number);
 
+extern lua_LHFunction lua_linehook;
+extern lua_CHFunction lua_callhook;
 extern int lua_debug;
 
 #endif

lualib.h

@@ -2,22 +2,28 @@
 ** Libraries to be used in LUA programs
 ** Grupo de Tecnologia em Computacao Grafica
 ** TeCGraf - PUC-Rio
-** $Id: lualib.h,v 1.5 1996/01/22 17:38:57 roberto Exp roberto $
+** $Id: lualib.h,v 1.12 1997/03/18 15:30:50 roberto Exp roberto $
 */
 
 #ifndef lualib_h
 #define lualib_h
 
+#include "lua.h"
+
 void iolib_open   (void);
 void strlib_open  (void);
 void mathlib_open (void);
 
 
+
 /* auxiliar functions (private) */
-void lua_arg_error(char *funcname);
-char *lua_check_string (int numArg, char *funcname);
-double lua_check_number (int numArg, char *funcname);
+
 char *luaI_addchar (int c);
+void luaI_emptybuff (void);
+void luaI_addquoted (char *s);
+
+char *luaL_item_end (char *p);
+int luaL_singlematch (int c, char *p);
 
 #endif
 

luamem.c

@@ -3,56 +3,157 @@
 ** TecCGraf - PUC-Rio
 */
 
-char *rcs_mem = "$Id: mem.c,v 1.6 1996/01/22 14:15:13 roberto Exp roberto $";
+char *rcs_luamem = "$Id: luamem.c,v 1.15 1997/03/31 14:17:09 roberto Exp roberto $";
 
 #include <stdlib.h>
-#include <string.h>
-#include <stdio.h>
 
-#include "mem.h"
+#include "luamem.h"
 #include "lua.h"
-#include "table.h"
 
-static void mem_error (void)
-{
-  Long recovered = luaI_collectgarbage();  /* try to collect garbage  */
-  if (recovered)
-    lua_error("not enough memory");
-  else
-  { /* if there is no garbage then must exit */
-    fprintf(stderr, "lua error: memory overflow - unable to recover\n");
-    exit(1);
-  }
-}
+
+#define DEBUG 0
+
+#if !DEBUG
 
 void luaI_free (void *block)
 {
-  *((int *)block) = -1;  /* to catch errors */
-  free(block);
-}
-
-
-void *luaI_malloc (unsigned long size)
-{
-  void *block = malloc((size_t)size);
-  if (block == NULL)
-    mem_error();
-  return block;
+  if (block)
+  {
+    *((char *)block) = -1;  /* to catch errors */
+    free(block);
+  }
 }
 
 
 void *luaI_realloc (void *oldblock, unsigned long size)
 {
-  void *block = realloc(oldblock, (size_t)size);
+  void *block;
+  size_t s = (size_t)size;
+  if (s != size)
+    lua_error("Allocation Error: Block too big");
+  block = oldblock ? realloc(oldblock, s) : malloc(s);
   if (block == NULL)
-    mem_error();
+    lua_error(memEM);
   return block;
 }
 
 
-char *luaI_strdup (char *str)
+int luaI_growvector (void **block, unsigned long nelems, int size,
+                       char *errormsg, unsigned long limit)
 {
-  char *newstr = luaI_malloc(strlen(str)+1);
-  strcpy(newstr, str);
-  return newstr;
+  if (nelems >= limit)
+    lua_error(errormsg);
+  nelems = (nelems == 0) ? 20 : nelems*2;
+  if (nelems > limit)
+    nelems = limit;
+  *block = luaI_realloc(*block, nelems*size);
+  return (int)nelems;
 }
+
+
+void* luaI_buffer (unsigned long size)
+{
+  static unsigned long buffsize = 0;
+  static char* buffer = NULL;
+  if (size > buffsize)
+    buffer = luaI_realloc(buffer, buffsize=size);
+  return buffer;
+}
+
+#else
+/* DEBUG */
+
+#include <stdio.h>
+
+# define assert(ex)    {if (!(ex)){(void)fprintf(stderr, \
+    "Assertion failed: file \"%s\", line %d\n", __FILE__, __LINE__);exit(1);}}
+
+#define MARK    55
+
+static unsigned long numblocks = 0;
+static unsigned long totalmem = 0;
+
+
+static void message (void)
+{
+#define inrange(x,y)   ((x) < (((y)*3)/2)  && (x) > (((y)*2)/3))
+  static int count = 0;
+  static unsigned long lastnumblocks = 0;
+  static unsigned long lasttotalmem = 0;
+  if (!inrange(numblocks, lastnumblocks) || !inrange(totalmem, lasttotalmem)
+       || count++ >= 5000)
+  {
+    fprintf(stderr,"blocks = %lu  mem = %luK\n", numblocks, totalmem/1000);
+    count = 0;
+    lastnumblocks = numblocks;
+    lasttotalmem = totalmem;
+  }
+}
+
+
+void luaI_free (void *block)
+{
+  if (block)
+  {
+    unsigned long *b = (unsigned long *)block - 1;
+    unsigned long size = *b;
+    assert(*(((char *)b)+size+sizeof(unsigned long)) == MARK);
+    numblocks--;
+    totalmem -= size;
+    free(b);
+    message();
+  }
+}
+
+
+void *luaI_realloc (void *oldblock, unsigned long size)
+{
+  unsigned long *block;
+  unsigned long realsize = sizeof(unsigned long)+size+sizeof(char);
+  if (realsize != (size_t)realsize)
+    lua_error("Allocation Error: Block too big");
+  if (oldblock)
+  {
+    unsigned long *b = (unsigned long *)oldblock - 1;
+    unsigned long oldsize = *b;
+    assert(*(((char *)b)+oldsize+sizeof(unsigned long)) == MARK);
+    totalmem -= oldsize;
+    numblocks--;
+    block = (unsigned long *)realloc(b, realsize);
+  }
+  else
+    block = (unsigned long *)malloc(realsize);
+  if (block == NULL)
+    lua_error("not enough memory");
+  totalmem += size;
+  numblocks++;
+  *block = size;
+  *(((char *)block)+size+sizeof(unsigned long)) = MARK;
+  message();
+  return block+1;
+}
+
+
+int luaI_growvector (void **block, unsigned long nelems, int size,
+                       char *errormsg, unsigned long limit)
+{
+  if (nelems >= limit)
+    lua_error(errormsg);
+  nelems = (nelems == 0) ? 20 : nelems*2;
+  if (nelems > limit)
+    nelems = limit;
+  *block = luaI_realloc(*block, nelems*size);
+  return (int)nelems;
+}
+
+
+void* luaI_buffer (unsigned long size)
+{
+  static unsigned long buffsize = 0;
+  static char* buffer = NULL;
+  if (size > buffsize)
+    buffer = luaI_realloc(buffer, buffsize=size);
+  return buffer;
+}
+
+#endif

luamem.h

@@ -1,25 +1,39 @@
 /*
 ** mem.c
 ** memory manager for lua
-** $Id: mem.h,v 1.1 1994/11/16 17:38:08 roberto Stab roberto $
+** $Id: luamem.h,v 1.8 1996/05/24 14:31:10 roberto Exp roberto $
 */
  
-#ifndef mem_h
-#define mem_h
+#ifndef luamem_h
+#define luamem_h
 
 #ifndef NULL
 #define NULL 0
 #endif
 
+
+/* memory error messages */
+#define codeEM   "code size overflow"
+#define symbolEM   "symbol table overflow"
+#define constantEM   "constant table overflow"
+#define stackEM   "stack size overflow"
+#define lexEM   "lex buffer overflow"
+#define refEM   "reference table overflow"
+#define tableEM  "table overflow"
+#define memEM "not enough memory"
+
+
 void luaI_free (void *block);
-void *luaI_malloc (unsigned long size);
 void *luaI_realloc (void *oldblock, unsigned long size);
+void *luaI_buffer (unsigned long size);
+int luaI_growvector (void **block, unsigned long nelems, int size,
+                       char *errormsg, unsigned long limit);
 
-char *luaI_strdup (char *str);
-
+#define luaI_malloc(s)	luaI_realloc(NULL, (s))
 #define new(s)          ((s *)luaI_malloc(sizeof(s)))
 #define newvector(n,s)  ((s *)luaI_malloc((n)*sizeof(s)))
-#define growvector(old,n,s) ((s *)luaI_realloc(old,(n)*sizeof(s)))
+#define growvector(old,n,s,e,l) \
+          (luaI_growvector((void**)old,n,sizeof(s),e,l))
 
 #endif 
 

makefile

@@ -1,12 +1,18 @@
-# $Id: makefile,v 1.19 1996/02/07 18:14:38 roberto Exp roberto $
+# $Id: makefile,v 1.35 1997/06/16 16:50:22 roberto Exp roberto $
 
 #configuration
 
 # define (undefine) POPEN if your system (does not) support piped I/O
-CONFIG = -DPOPEN
+# define (undefine) _POSIX_SOURCE if your system is (not) POSIX compliant
+#define (undefine) NOSTRERROR if your system does NOT have function "strerror"
+# (although this is ANSI, SunOS does not comply; so, add "-DNOSTRERROR" on SunOS)
+# define LUA_COMPAT2_5=0 if yous system does not need to be compatible with
+# version 2.5 (or older)
+CONFIG = -DPOPEN -D_POSIX_SOURCE
 # Compilation parameters
 CC = gcc
-CFLAGS = $(CONFIG) -I/usr/5include -Wall -Wmissing-prototypes -Wshadow -ansi -O2
+CWARNS = -Wall -Wmissing-prototypes -Wshadow -pedantic -Wpointer-arith -Wcast-align -Waggregate-return
+CFLAGS = $(CONFIG) $(CWARNS) -ansi -O2 -fomit-frame-pointer
 
 #CC = acc
 #CFLAGS = -fast -I/usr/5include
@@ -14,6 +20,7 @@ CFLAGS = $(CONFIG) -I/usr/5include -Wall -Wmissing-prototypes -Wshadow -ansi -O2
 AR = ar
 ARFLAGS	= rvl
 
+
 # Aplication modules
 LUAOBJS = \
 	parser.o \
@@ -24,8 +31,11 @@ LUAOBJS = \
 	inout.o \
 	tree.o \
 	fallback.o \
-	mem.o \
-	func.o
+	luamem.o \
+	func.o \
+	undump.o \
+	auxlib.o \
+	zio.o
 
 LIBOBJS = 	\
 	iolib.o \
@@ -33,14 +43,14 @@ LIBOBJS = 	\
 	strlib.o
 
 
-lua : lua.o lua.a lualib.a
-	$(CC) $(CFLAGS) -o $@ lua.o lua.a lualib.a -lm
+lua : lua.o liblua.a liblualib.a
+	$(CC) $(CFLAGS) -o $@ lua.o -L. -llua -llualib -lm
 
-lua.a : parser.o $(LUAOBJS)
+liblua.a : $(LUAOBJS)
 	$(AR) $(ARFLAGS) $@  $?
-	ranlib lua.a
+	ranlib $@
 
-lualib.a : $(LIBOBJS)
+liblualib.a : $(LIBOBJS)
 	$(AR) $(ARFLAGS) $@  $?
 	ranlib $@
 
@@ -48,10 +58,10 @@ liblua.so.1.0 : lua.o
 	ld -o liblua.so.1.0 $(LUAOBJS)
 
 y.tab.c y.tab.h  : lua.stx
-	yacc++ -d lua.stx
+	yacc -d lua.stx
 
 parser.c : y.tab.c
-	sed -e 's/yy/luaY_/g' y.tab.c > parser.c
+	sed -e 's/yy/luaY_/g' -e 's/malloc\.h/stdlib\.h/g' y.tab.c > parser.c
 
 parser.h : y.tab.h
 	sed -e 's/yy/luaY_/g' y.tab.h > parser.h
@@ -62,25 +72,40 @@ clear	:
 	rm -f parser.c parser.h y.tab.c y.tab.h
 	co lua.h lualib.h luadebug.h
 
-% : RCS/%,v
+
+%.h : RCS/%.h,v
+	co $@
+
+%.c : RCS/%.c,v
 	co $@
 
 
-fallback.o : fallback.c mem.h fallback.h opcode.h lua.h types.h tree.h func.h 
-func.o : func.c luadebug.h lua.h table.h tree.h types.h opcode.h func.h mem.h 
-hash.o : hash.c mem.h opcode.h lua.h types.h tree.h func.h hash.h table.h 
-inout.o : inout.c lex.h opcode.h lua.h types.h tree.h func.h inout.h table.h 
-iolib.o : iolib.c lua.h luadebug.h lualib.h 
-lex.o : lex.c mem.h tree.h types.h table.h opcode.h lua.h func.h lex.h inout.h \
-  luadebug.h parser.h ugly.h 
-lua.o : lua.c lua.h lualib.h 
-mathlib.o : mathlib.c lualib.h lua.h 
-mem.o : mem.c mem.h lua.h table.h tree.h types.h opcode.h func.h 
-opcode.o : opcode.c luadebug.h lua.h mem.h opcode.h types.h tree.h func.h hash.h \
-  inout.h table.h fallback.h 
-parser.o : parser.c luadebug.h lua.h mem.h lex.h opcode.h types.h tree.h func.h \
-  hash.h inout.h table.h 
-strlib.o : strlib.c lua.h lualib.h 
-table.o : table.c mem.h opcode.h lua.h types.h tree.h func.h hash.h table.h \
-  inout.h fallback.h luadebug.h 
-tree.o : tree.c mem.h lua.h tree.h types.h hash.h opcode.h func.h table.h 
+auxlib.o: auxlib.c lua.h auxlib.h luadebug.h
+fallback.o: fallback.c auxlib.h lua.h luamem.h fallback.h opcode.h \
+ types.h tree.h func.h table.h hash.h
+func.o: func.c luadebug.h lua.h table.h tree.h types.h opcode.h func.h \
+ luamem.h
+hash.o: hash.c luamem.h opcode.h lua.h types.h tree.h func.h hash.h \
+ table.h auxlib.h
+inout.o: inout.c auxlib.h lua.h fallback.h opcode.h types.h tree.h \
+ func.h hash.h inout.h lex.h zio.h luamem.h table.h undump.h
+iolib.o: iolib.c lua.h auxlib.h luadebug.h lualib.h
+lex.o: lex.c auxlib.h lua.h luamem.h tree.h types.h table.h opcode.h \
+ func.h lex.h zio.h inout.h luadebug.h parser.h
+lua.o: lua.c lua.h auxlib.h lualib.h
+luamem.o: luamem.c luamem.h lua.h
+mathlib.o: mathlib.c lualib.h lua.h auxlib.h
+opcode.o: opcode.c luadebug.h lua.h luamem.h opcode.h types.h tree.h \
+ func.h hash.h inout.h table.h fallback.h auxlib.h lex.h zio.h
+parser.o: parser.c luadebug.h lua.h luamem.h lex.h zio.h opcode.h \
+ types.h tree.h func.h hash.h inout.h table.h
+strlib.o: strlib.c lua.h auxlib.h lualib.h
+table.o: table.c luamem.h auxlib.h lua.h func.h types.h tree.h \
+ opcode.h hash.h table.h inout.h fallback.h luadebug.h
+tree.o: tree.c luamem.h lua.h tree.h types.h lex.h zio.h hash.h \
+ opcode.h func.h table.h fallback.h
+undump.o: undump.c auxlib.h lua.h opcode.h types.h tree.h func.h \
+ luamem.h table.h undump.h zio.h
+y.tab.o: y.tab.c luadebug.h lua.h luamem.h lex.h zio.h opcode.h \
+ types.h tree.h func.h hash.h inout.h table.h
+zio.o: zio.c zio.h

mathlib.c

@@ -3,12 +3,13 @@
 ** Mathematics library to LUA
 */
 
-char *rcs_mathlib="$Id: mathlib.c,v 1.13 1995/11/10 17:54:31 roberto Exp roberto $";
+char *rcs_mathlib="$Id: mathlib.c,v 1.24 1997/06/09 17:30:10 roberto Exp roberto $";
 
 #include <stdlib.h>
 #include <math.h>
 
 #include "lualib.h"
+#include "auxlib.h"
 #include "lua.h"
 
 #ifndef PI
@@ -19,7 +20,7 @@ char *rcs_mathlib="$Id: mathlib.c,v 1.13 1995/11/10 17:54:31 roberto Exp roberto
 
 static void math_abs (void)
 {
- double d = lua_check_number(1, "abs"); 
+ double d = luaL_check_number(1); 
  if (d < 0) d = -d;
  lua_pushnumber (d);
 }
@@ -27,7 +28,7 @@ static void math_abs (void)
 
 static void math_sin (void)
 {
- double d = lua_check_number(1, "sin");
+ double d = luaL_check_number(1);
  lua_pushnumber (sin(TORAD(d)));
 }
 
@@ -35,7 +36,7 @@ static void math_sin (void)
 
 static void math_cos (void)
 {
- double d = lua_check_number(1, "cos");
+ double d = luaL_check_number(1);
  lua_pushnumber (cos(TORAD(d)));
 }
 
@@ -43,98 +44,82 @@ static void math_cos (void)
 
 static void math_tan (void)
 {
- double d = lua_check_number(1, "tan");
+ double d = luaL_check_number(1);
  lua_pushnumber (tan(TORAD(d)));
 }
 
 
 static void math_asin (void)
 {
- double d = lua_check_number(1, "asin");
+ double d = luaL_check_number(1);
  lua_pushnumber (TODEGREE(asin(d)));
 }
 
 
 static void math_acos (void)
 {
- double d = lua_check_number(1, "acos");
+ double d = luaL_check_number(1);
  lua_pushnumber (TODEGREE(acos(d)));
 }
 
 
 static void math_atan (void)
 {
- double d = lua_check_number(1, "atan");
+ double d = luaL_check_number(1);
  lua_pushnumber (TODEGREE(atan(d)));
 }
 
 
 static void math_atan2 (void)
 {
- double d1 = lua_check_number(1, "atan2");
- double d2 = lua_check_number(2, "atan2");
+ double d1 = luaL_check_number(1);
+ double d2 = luaL_check_number(2);
  lua_pushnumber (TODEGREE(atan2(d1, d2)));
 }
 
 
 static void math_ceil (void)
 {
- double d = lua_check_number(1, "ceil");
+ double d = luaL_check_number(1);
  lua_pushnumber (ceil(d));
 }
 
 
 static void math_floor (void)
 {
- double d = lua_check_number(1, "floor");
+ double d = luaL_check_number(1);
  lua_pushnumber (floor(d));
 }
 
 static void math_mod (void)
 {
- int d1 = (int)lua_check_number(1, "mod");
- int d2 = (int)lua_check_number(2, "mod");
- lua_pushnumber (d1%d2);
+  float x = luaL_check_number(1);
+  float y = luaL_check_number(2);
+  lua_pushnumber(fmod(x, y));
 }
 
 
 static void math_sqrt (void)
 {
- double d = lua_check_number(1, "sqrt");
+ double d = luaL_check_number(1);
  lua_pushnumber (sqrt(d));
 }
 
-static int old_pow;
 
 static void math_pow (void)
 {
- lua_Object o1 = lua_getparam (1);
- lua_Object o2 = lua_getparam (2);
- lua_Object op = lua_getparam(3);
- if (!lua_isnumber(o1) || !lua_isnumber(o2) || *(lua_getstring(op)) != 'p')
- {
-   lua_Object old = lua_getlocked(old_pow);
-   lua_pushobject(o1);
-   lua_pushobject(o2);
-   lua_pushobject(op);
-   if (lua_callfunction(old) != 0)
-     lua_error(NULL);
- }
- else
- {
-   double d1 = lua_getnumber(o1);
-   double d2 = lua_getnumber(o2);
-   lua_pushnumber (pow(d1,d2));
- }
+  double d1 = luaL_check_number(1);
+  double d2 = luaL_check_number(2);
+  lua_pushnumber(pow(d1,d2));
 }
 
 static void math_min (void)
 {
  int i=1;
- double dmin = lua_check_number(i, "min");
+ double dmin = luaL_check_number(i);
  while (lua_getparam(++i) != LUA_NOOBJECT)
  {
-  double d = lua_check_number(i, "min");
+  double d = luaL_check_number(i);
   if (d < dmin) dmin = d;
  }
  lua_pushnumber (dmin);
@@ -143,10 +128,10 @@ static void math_min (void)
 static void math_max (void)
 {
  int i=1;
- double dmax = lua_check_number(i, "max");
+ double dmax = luaL_check_number(i);
  while (lua_getparam(++i) != LUA_NOOBJECT)
  {
-  double d = lua_check_number(i, "max");
+  double d = luaL_check_number(i);
   if (d > dmax) dmax = d;
  }
  lua_pushnumber (dmax);
@@ -154,33 +139,33 @@ static void math_max (void)
 
 static void math_log (void)
 {
- double d = lua_check_number(1, "log");
+ double d = luaL_check_number(1);
  lua_pushnumber (log(d));
 }
 
 
 static void math_log10 (void)
 {
- double d = lua_check_number(1, "log10");
+ double d = luaL_check_number(1);
  lua_pushnumber (log10(d));
 }
 
 
 static void math_exp (void)
 {
- double d = lua_check_number(1, "exp");
+ double d = luaL_check_number(1);
  lua_pushnumber (exp(d));
 }
 
 static void math_deg (void)
 {
- float d = lua_check_number(1, "deg");
+ float d = luaL_check_number(1);
  lua_pushnumber (d*180./PI);
 }
 
 static void math_rad (void)
 {
- float d = lua_check_number(1, "rad");
+ float d = luaL_check_number(1);
  lua_pushnumber (d/180.*PI);
 }
 
@@ -191,37 +176,42 @@ static void math_random (void)
 
 static void math_randomseed (void)
 {
-  srand(lua_check_number(1, "randomseed"));
+  srand(luaL_check_number(1));
 }
 
 
+static struct luaL_reg mathlib[] = {
+{"abs",   math_abs},
+{"sin",   math_sin},
+{"cos",   math_cos},
+{"tan",   math_tan},
+{"asin",  math_asin},
+{"acos",  math_acos},
+{"atan",  math_atan},
+{"atan2",  math_atan2},
+{"ceil",  math_ceil},
+{"floor", math_floor},
+{"mod",   math_mod},
+{"sqrt",  math_sqrt},
+{"min",   math_min},
+{"max",   math_max},
+{"log",   math_log},
+{"log10", math_log10},
+{"exp",   math_exp},
+{"deg",   math_deg},
+{"rad",   math_rad},
+{"random",     math_random},
+{"randomseed", math_randomseed}
+};
 
 /*
 ** Open math library
 */
 void mathlib_open (void)
 {
- lua_register ("abs",   math_abs);
- lua_register ("sin",   math_sin);
- lua_register ("cos",   math_cos);
- lua_register ("tan",   math_tan);
- lua_register ("asin",  math_asin);
- lua_register ("acos",  math_acos);
- lua_register ("atan",  math_atan);
- lua_register ("atan2",  math_atan2);
- lua_register ("ceil",  math_ceil);
- lua_register ("floor", math_floor);
- lua_register ("mod",   math_mod);
- lua_register ("sqrt",  math_sqrt);
- lua_register ("min",   math_min);
- lua_register ("max",   math_max);
- lua_register ("log",   math_log);
- lua_register ("log10", math_log10);
- lua_register ("exp",   math_exp);
- lua_register ("deg",   math_deg);
- lua_register ("rad",   math_rad);
- lua_register ("random",     math_random);
- lua_register ("randomseed", math_randomseed);
-
- old_pow = lua_lockobject(lua_setfallback("arith", math_pow));
+  luaL_openlib(mathlib, (sizeof(mathlib)/sizeof(mathlib[0])));
+  lua_pushcfunction(math_pow);
+  lua_pushnumber(0);  /* to get its tag */
+  lua_settagmethod(lua_tag(lua_pop()), "pow");
 }
+

opcode.h

@@ -1,6 +1,6 @@
 /*
 ** TeCGraf - PUC-Rio
-** $Id: opcode.h,v 3.16 1996/01/26 18:03:19 roberto Exp roberto $
+** $Id: opcode.h,v 3.33 1997/04/11 21:34:53 roberto Exp roberto $
 */
 
 #ifndef opcode_h
@@ -14,60 +14,106 @@
 
 #define FIELDS_PER_FLUSH 40
 
+/*
+* WARNING: if you change the order of this enumeration,
+* grep "ORDER LUA_T"
+*/
+typedef enum
+{
+ LUA_T_NIL      = -9,
+ LUA_T_NUMBER   = -8,
+ LUA_T_STRING   = -7,
+ LUA_T_ARRAY    = -6,  /* array==table */
+ LUA_T_FUNCTION = -5,
+ LUA_T_CFUNCTION= -4,
+ LUA_T_MARK     = -3,
+ LUA_T_CMARK    = -2,
+ LUA_T_LINE     = -1,
+ LUA_T_USERDATA = 0
+} lua_Type;
 
-typedef enum 
-{ 
- PUSHNIL,
- PUSH0, PUSH1, PUSH2,
- PUSHBYTE,
- PUSHWORD,
- PUSHFLOAT,
- PUSHSTRING,
- PUSHFUNCTION,
- PUSHLOCAL0, PUSHLOCAL1, PUSHLOCAL2, PUSHLOCAL3, PUSHLOCAL4,
- PUSHLOCAL5, PUSHLOCAL6, PUSHLOCAL7, PUSHLOCAL8, PUSHLOCAL9,
- PUSHLOCAL,
- PUSHGLOBAL,
- PUSHINDEXED,
- PUSHSELF,
- STORELOCAL0, STORELOCAL1, STORELOCAL2, STORELOCAL3, STORELOCAL4,
- STORELOCAL5, STORELOCAL6, STORELOCAL7, STORELOCAL8, STORELOCAL9,
- STORELOCAL,
- STOREGLOBAL,
- STOREINDEXED0,
- STOREINDEXED,
- STORELIST0,
- STORELIST,
- STORERECORD,
- ADJUST0,
- ADJUST,
- CREATEARRAY,
- EQOP,
- LTOP,
- LEOP,
- GTOP,
- GEOP,
- ADDOP,
- SUBOP,
- MULTOP,
- DIVOP,
- POWOP,
- CONCOP,
- MINUSOP,
- NOTOP,
- ONTJMP,
- ONFJMP,
- JMP,
- UPJMP,
- IFFJMP,
- IFFUPJMP,
- POP,
- CALLFUNC,
- RETCODE0,
- RETCODE,
- SETLINE
+#define NUM_TYPES 10
+
+
+extern char *luaI_typenames[];
+
+typedef enum {
+/* name          parm    before          after           side effect
+-----------------------------------------------------------------------------*/
+
+PUSHNIL,/*		-		nil  */
+PUSH0,/*		-		0.0  */
+PUSH1,/*		-		1.0  */
+PUSH2,/*		-		2.0  */
+PUSHBYTE,/*	b	-		(float)b  */
+PUSHWORD,/*	w	-		(float)w  */
+PUSHFLOAT,/*	f	-		f  */
+PUSHSTRING,/*	w	-		STR[w]  */
+PUSHFUNCTION,/*	p	-		FUN(p)  */
+PUSHLOCAL0,/*		-		LOC[0]  */
+PUSHLOCAL1,/*		-		LOC[1]  */
+PUSHLOCAL2,/*		-		LOC[2]  */
+PUSHLOCAL3,/*		-		LOC[3]  */
+PUSHLOCAL4,/*		-		LOC[4]  */
+PUSHLOCAL5,/*		-		LOC[5]  */
+PUSHLOCAL6,/*		-		LOC[6]  */
+PUSHLOCAL7,/*		-		LOC[7]  */
+PUSHLOCAL8,/*		-		LOC[8]  */
+PUSHLOCAL9,/*		-		LOC[9]  */
+PUSHLOCAL,/*	b	-		LOC[b]  */
+PUSHGLOBAL,/*	w	-		VAR[w]  */
+PUSHINDEXED,/*		i t		t[i]  */
+PUSHSELF,/*	w	t		t t[STR[w]]  */
+STORELOCAL0,/*		x		-		LOC[0]=x  */
+STORELOCAL1,/*		x		-		LOC[1]=x  */
+STORELOCAL2,/*		x		-		LOC[2]=x  */
+STORELOCAL3,/*		x		-		LOC[3]=x  */
+STORELOCAL4,/*		x		-		LOC[4]=x  */
+STORELOCAL5,/*		x		-		LOC[5]=x  */
+STORELOCAL6,/*		x		-		LOC[6]=x  */
+STORELOCAL7,/*		x		-		LOC[7]=x  */
+STORELOCAL8,/*		x		-		LOC[8]=x  */
+STORELOCAL9,/*		x		-		LOC[9]=x  */
+STORELOCAL,/*	b	x		-		LOC[b]=x  */
+STOREGLOBAL,/*	w	x		-		VAR[w]=x  */
+STOREINDEXED0,/*	v i t		-		t[i]=v  */
+STOREINDEXED,/*	b	v a_b...a_1 i t	a_b...a_1 i t	t[i]=v  */
+STORELIST0,/*	b	v_b...v_1 t	-		t[i]=v_i  */
+STORELIST,/*	b c	v_b...v_1 t	-		t[i+c*FPF]=v_i  */
+STORERECORD,/*	b
+		w_b...w_1 v_b...v_1 t	-		t[STR[w_i]]=v_i  */
+ADJUST0,/*		-		-		TOP=BASE  */
+ADJUST,/*	b	-		-		TOP=BASE+b  */
+CREATEARRAY,/*	w	-		newarray(size = w)  */
+EQOP,/*			y x		(x==y)? 1 : nil  */
+LTOP,/*			y x		(x<y)? 1 : nil  */
+LEOP,/*			y x		(x<y)? 1 : nil  */
+GTOP,/*			y x		(x>y)? 1 : nil  */
+GEOP,/*			y x		(x>=y)? 1 : nil  */
+ADDOP,/*		y x		x+y  */
+SUBOP,/*		y x		x-y  */
+MULTOP,/*		y x		x*y  */
+DIVOP,/*		y x		x/y  */
+POWOP,/*		y x		x^y  */
+CONCOP,/*		y x		x..y  */
+MINUSOP,/*		x		-x  */
+NOTOP,/*		x		(x==nil)? 1 : nil  */
+ONTJMP,/*	w	x		-		(x!=nil)? PC+=w  */
+ONFJMP,/*	w	x		-		(x==nil)? PC+=w  */
+JMP,/*		w	-		-		PC+=w  */
+UPJMP,/*	w	-		-		PC-=w  */
+IFFJMP,/*	w	x		-		(x==nil)? PC+=w  */
+IFFUPJMP,/*	w	x		-		(x==nil)? PC-=w  */
+POP,/*			x		-  */
+CALLFUNC,/*	b c	v_b...v_1 f	r_c...r_1	f(v1,...,v_b)  */
+RETCODE0,
+RETCODE,/*	b	-		-  */
+SETLINE,/*	w	-		-		LINE=w  */
+VARARGS,/*	b	v_b...v_1	{v_1...v_b;n=b}  */
+STOREMAP/*	b	v_b k_b ...v_1 k_1 t	-	t[k_i]=v_i  */
 } OpCode;
 
+
 #define MULT_RET	255
 
 
@@ -78,67 +124,48 @@ typedef union
  TaggedString *ts;
  TFunc         *tf;
  struct Hash    *a;
- void           *u;
  int	       i;
 } Value;
 
-typedef struct Object
+typedef struct TObject
 {
- lua_Type  tag;
+ lua_Type ttype;
  Value value;
-} Object;
+} TObject;
 
 
 /* Macros to access structure members */
-#define tag(o)		((o)->tag)
+#define ttype(o)	((o)->ttype)
 #define nvalue(o)	((o)->value.n)
 #define svalue(o)	((o)->value.ts->str)
 #define tsvalue(o)	((o)->value.ts)
 #define avalue(o)	((o)->value.a)
 #define fvalue(o)	((o)->value.f)
-#define uvalue(o)	((o)->value.u)
 
 /* Macros to access symbol table */
 #define s_object(i)	(lua_table[i].object)
-#define s_tag(i)	(tag(&s_object(i)))
+#define s_ttype(i)	(ttype(&s_object(i)))
 #define s_nvalue(i)	(nvalue(&s_object(i)))
 #define s_svalue(i)	(svalue(&s_object(i)))
+#define s_tsvalue(i)	(tsvalue(&s_object(i)))
 #define s_avalue(i)	(avalue(&s_object(i)))
 #define s_fvalue(i)	(fvalue(&s_object(i)))
 #define s_uvalue(i)	(uvalue(&s_object(i)))
 
-typedef union
-{
- struct {char c1; char c2;} m;
- Word w;
-} CodeWord;
-#define get_word(code,pc)    {code.m.c1 = *pc++; code.m.c2 = *pc++;}
-
-typedef union
-{
- struct {char c1; char c2; char c3; char c4;} m;
- float f;
-} CodeFloat;
-#define get_float(code,pc)   {code.m.c1 = *pc++; code.m.c2 = *pc++;\
-                              code.m.c3 = *pc++; code.m.c4 = *pc++;}
-
-typedef union
-{
- struct {char c1; char c2; char c3; char c4;} m;
- TFunc *tf;
-} CodeCode;
-#define get_code(code,pc)    {code.m.c1 = *pc++; code.m.c2 = *pc++;\
-                              code.m.c3 = *pc++; code.m.c4 = *pc++;}
+#define get_word(code,pc) {memcpy(&code, pc, sizeof(Word)); pc+=sizeof(Word);}
+#define get_float(code,pc){memcpy(&code, pc, sizeof(real)); pc+=sizeof(real);}
+#define get_code(code,pc) {memcpy(&code, pc, sizeof(TFunc *)); \
+                           pc+=sizeof(TFunc *);}
 
 
 /* Exported functions */
-char   *lua_strdup (char *l);
-
 void    lua_parse      (TFunc *tf);	/* from "lua.stx" module */
 void	luaI_codedebugline (int line);  /* from "lua.stx" module */
-void    lua_travstack (int (*fn)(Object *));
-Object *luaI_Address (lua_Object o);
-void	luaI_pushobject (Object *o);
-void    luaI_gcFB       (Object *o);
+void    lua_travstack (int (*fn)(TObject *));
+TObject *luaI_Address (lua_Object o);
+void	luaI_pushobject (TObject *o);
+void    luaI_gcIM       (TObject *o);
+int     luaI_dorun (TFunc *tf);
+int     lua_domain (void);
 
 #endif

strlib.c

@@ -3,7 +3,7 @@
 ** String library to LUA
 */
 
-char *rcs_strlib="$Id: strlib.c,v 1.18 1996/02/12 18:32:40 roberto Exp $";
+char *rcs_strlib="$Id: strlib.c,v 1.45 1997/06/19 17:45:28 roberto Exp roberto $";
 
 #include <string.h>
 #include <stdio.h>
@@ -11,153 +11,123 @@ char *rcs_strlib="$Id: strlib.c,v 1.18 1996/02/12 18:32:40 roberto Exp $";
 #include <ctype.h>
 
 #include "lua.h"
+#include "auxlib.h"
 #include "lualib.h"
 
 
-void lua_arg_error(char *funcname)
-{
-  char buff[100];
-  sprintf(buff, "incorrect arguments to function `%s'", funcname);
-  lua_error(buff);
-}
+struct lbuff {
+  char *b;
+  size_t max;
+  size_t size;
+};
 
-char *lua_check_string (int numArg, char *funcname)
-{
-  lua_Object o = lua_getparam(numArg);
-  if (!(lua_isstring(o) || lua_isnumber(o)))
-    lua_arg_error(funcname);
-  return lua_getstring(o);
-}
+static struct lbuff lbuffer = {NULL, 0, 0};
 
-double lua_check_number (int numArg, char *funcname)
+
+static char *strbuffer (unsigned long size)
 {
-  lua_Object o = lua_getparam(numArg);
-  if (lua_isnumber(o))
-    return lua_getnumber(o);
-  else if (lua_isstring(o))
-  {
-    float t;
-    char c;
-    if (sscanf(lua_getstring(o), "%f %c",&t, &c) == 1)
-      return t;
+  if (size > lbuffer.max) {
+    /* ANSI "realloc" doesn't need this test, but some machines (Sun!)
+       don't follow ANSI */
+    lbuffer.b = (lbuffer.b) ? realloc(lbuffer.b, lbuffer.max=size) :
+                              malloc(lbuffer.max=size);
+    if (lbuffer.b == NULL)
+      lua_error("memory overflow");
   }
-  lua_arg_error(funcname);
-  return 0;  /* to avoid warnings */
+  return lbuffer.b;
+}
+
+static char *openspace (unsigned long size)
+{
+  char *buff = strbuffer(lbuffer.size+size);
+  return buff+lbuffer.size;
 }
 
 char *luaI_addchar (int c)
 {
-  static char *buff = NULL;
-  static int max = 0;
-  static int n = 0;
-  if (n >= max)
-  {
-    if (max == 0)
-    {
-      max = 100;
-      buff = (char *)malloc(max);
-    }
-    else
-    {
-      max *= 2;
-      buff = (char *)realloc(buff, max);
-    }
-    if (buff == NULL)
-      lua_error("memory overflow");
-  }
-  buff[n++] = c;
-  if (c == 0)
-    n = 0;  /* prepare for next string */
-  return buff;
+  if (lbuffer.size >= lbuffer.max)
+    strbuffer(lbuffer.max == 0 ? 100 : lbuffer.max*2);
+  lbuffer.b[lbuffer.size++] = c;
+  return lbuffer.b;
 }
 
-
-/*
-** Return the position of the first caracter of a substring into a string
-** LUA interface:
-**			n = strfind (string, substring, init, end)
-*/
-static void str_find (void)
+void luaI_emptybuff (void)
 {
- char *s1 = lua_check_string(1, "strfind");
- char *s2 = lua_check_string(2, "strfind");
- int init = (lua_getparam(3) == LUA_NOOBJECT) ? 0 :
-                                 (int)lua_check_number(3, "strfind")-1;
- char *f = strstr(s1+init,s2);
- if (f != NULL)
- {
-  int pos = f-s1+1;
-  if (lua_getparam (4) == LUA_NOOBJECT)
-   lua_pushnumber (pos);
-  else if ((int)lua_check_number(4, "strfind") >= pos+strlen(s2)-1)
-   lua_pushnumber (pos);
-  else
-   lua_pushnil();
- }
- else
-  lua_pushnil();
+  lbuffer.size = 0;  /* prepare for next string */
 }
 
+
+static void addnchar (char *s, int n)
+{
+  char *b = openspace(n);
+  strncpy(b, s, n);
+  lbuffer.size += n;
+}
+
+static void addstr (char *s)
+{
+  addnchar(s, strlen(s));
+}
+
+
 /*
 ** Return the string length
-** LUA interface:
-**			n = strlen (string)
 */
 static void str_len (void)
 {
- char *s = lua_check_string(1, "strlen");
- lua_pushnumber(strlen(s));
+ lua_pushnumber(strlen(luaL_check_string(1)));
 }
 
-
 /*
-** Return the substring of a string, from start to end
-** LUA interface:
-**			substring = strsub (string, start, end)
+** Return the substring of a string
 */
 static void str_sub (void)
 {
- char *s = lua_check_string(1, "strsub");
- int start = (int)lua_check_number(2, "strsub");
- int end = (lua_getparam(3) == LUA_NOOBJECT) ? strlen(s) :
-                                    (int)lua_check_number(3, "strsub");
- if (end < start || start < 1 || end > strlen(s))
-  lua_pushliteral("");
- else
- {
-   luaI_addchar(0);
-   while (start <= end) 
-     luaI_addchar(s[start++ - 1]);
-   lua_pushstring (luaI_addchar(0));
- }
+  char *s = luaL_check_string(1);
+  long l = strlen(s);
+  long start = (long)luaL_check_number(2);
+  long end = (long)luaL_opt_number(3, -1);
+  if (start < 0) start = l+start+1;
+  if (end < 0) end = l+end+1;
+  if (1 <= start && start <= end && end <= l) {
+    luaI_emptybuff();
+    addnchar(s+start-1, end-start+1);
+    lua_pushstring(luaI_addchar(0));
+  }
+  else lua_pushstring("");
 }
 
 /*
 ** Convert a string to lower case.
-** LUA interface:
-**			lowercase = strlower (string)
 */
 static void str_lower (void)
 {
-  char *s = lua_check_string(1, "strlower");
-  luaI_addchar(0);
-  while (*s)
-    luaI_addchar(tolower(*s++));
+  char *s;
+  luaI_emptybuff();
+  for (s = luaL_check_string(1); *s; s++)
+    luaI_addchar(tolower((unsigned char)*s));
   lua_pushstring(luaI_addchar(0));
 }
 
-
 /*
 ** Convert a string to upper case.
-** LUA interface:
-**			uppercase = strupper (string)
 */
 static void str_upper (void)
 {
-  char *s = lua_check_string(1, "strupper");
-  luaI_addchar(0);
-  while (*s)
-    luaI_addchar(toupper(*s++));
+  char *s;
+  luaI_emptybuff();
+  for (s = luaL_check_string(1); *s; s++)
+    luaI_addchar(toupper((unsigned char)*s));
+  lua_pushstring(luaI_addchar(0));
+}
+
+static void str_rep (void)
+{
+  char *s = luaL_check_string(1);
+  int n = (int)luaL_check_number(2);
+  luaI_emptybuff();
+  while (n-- > 0)
+    addstr(s);
   lua_pushstring(luaI_addchar(0));
 }
 
@@ -166,91 +136,400 @@ static void str_upper (void)
 */
 static void str_ascii (void)
 {
-  char *s = lua_check_string(1, "ascii");
-  lua_Object o2 = lua_getparam(2);
-  int pos;
-  pos = (o2 == LUA_NOOBJECT) ? 0 : (int)lua_check_number(2, "ascii")-1;
-  if (pos<0 || pos>=strlen(s))
-    lua_arg_error("ascii");
-  lua_pushnumber(s[pos]);
+  char *s = luaL_check_string(1);
+  long pos = (long)luaL_opt_number(2, 1) - 1;
+  luaL_arg_check(0<=pos && pos<strlen(s), 2,  "out of range");
+  lua_pushnumber((unsigned char)s[pos]);
 }
 
 
-#define MAX_CONVERTION 2000
-#define MAX_FORMAT 50
+/* pattern matching */
+
+#define ESC	'%'
+#define SPECIALS  "^$*?.([%-"
+
+static char *bracket_end (char *p)
+{
+  return (*p == 0) ? NULL : strchr((*p=='^') ? p+2 : p+1, ']');
+}
+
+char *luaL_item_end (char *p)
+{
+  switch (*p++) {
+    case '\0': return p-1;
+    case ESC:
+      if (*p == 0) luaL_verror("incorrect pattern (ends with `%c')", ESC);
+      return p+1;
+    case '[': {
+      char *end = bracket_end(p);
+      if (end == NULL) lua_error("incorrect pattern (missing `]')");
+      return end+1;
+    }
+    default:
+      return p;
+  }
+}
+
+static int matchclass (int c, int cl)
+{
+  int res;
+  switch (tolower((unsigned char)cl)) {
+    case 'a' : res = isalpha((unsigned char)c); break;
+    case 'c' : res = iscntrl((unsigned char)c); break;
+    case 'd' : res = isdigit((unsigned char)c); break;
+    case 'l' : res = islower((unsigned char)c); break;
+    case 'p' : res = ispunct((unsigned char)c); break;
+    case 's' : res = isspace((unsigned char)c); break;
+    case 'u' : res = isupper((unsigned char)c); break;
+    case 'w' : res = isalnum((unsigned char)c); break;
+    default: return (cl == c);
+  }
+  return (islower((unsigned char)cl) ? res : !res);
+}
+
+int luaL_singlematch (int c, char *p)
+{
+  if (c == 0) return 0;
+  switch (*p) {
+    case '.': return 1;
+    case ESC: return matchclass(c, *(p+1));
+    case '[': {
+      char *end = bracket_end(p+1);
+      int sig = *(p+1) == '^' ? (p++, 0) : 1;
+      while (++p < end) {
+        if (*p == ESC) {
+          if (((p+1) < end) && matchclass(c, *++p)) return sig;
+        }
+        else if ((*(p+1) == '-') && (p+2 < end)) {
+          p+=2;
+          if (*(p-2) <= c && c <= *p) return sig;
+        }
+        else if (*p == c) return sig;
+      }
+      return !sig;
+    }
+    default: return (*p == c);
+  }
+}
+
+#define MAX_CAPT 9
+
+static struct {
+  char *init;
+  int len;  /* -1 signals unfinished capture */
+} capture[MAX_CAPT];
+
+static int num_captures;  /* only valid after a sucessful call to match */
+
+
+static void push_captures (void)
+{
+  int i;
+  for (i=0; i<num_captures; i++) {
+    int l = capture[i].len;
+    char *buff = openspace(l+1);
+    if (l == -1) lua_error("unfinished capture");
+    strncpy(buff, capture[i].init, l);
+    buff[l] = 0;
+    lua_pushstring(buff);
+  }
+}
+
+static int check_cap (int l, int level)
+{
+  l -= '1';
+  if (!(0 <= l && l < level && capture[l].len != -1))
+    lua_error("invalid capture index");
+  return l;
+}
+
+static int capture_to_close (int level)
+{
+  for (level--; level>=0; level--)
+    if (capture[level].len == -1) return level;
+  lua_error("invalid pattern capture");
+  return 0;  /* to avoid warnings */
+}
+
+static char *matchbalance (char *s, int b, int e)
+{
+  if (*s != b) return NULL;
+  else {
+    int cont = 1;
+    while (*(++s)) {
+      if (*s == e) {
+        if (--cont == 0) return s+1;
+      }
+      else if (*s == b) cont++;
+    }
+  }
+  return NULL;  /* string ends out of balance */
+}
+
+static char *match (char *s, char *p, int level)
+{
+  init: /* using goto's to optimize tail recursion */
+  switch (*p) {
+    case '(':  /* start capture */
+      if (level >= MAX_CAPT) lua_error("too many captures");
+      capture[level].init = s;
+      capture[level].len = -1;
+      level++; p++; goto init;  /* return match(s, p+1, level); */
+    case ')': {  /* end capture */
+      int l = capture_to_close(level);
+      char *res;
+      capture[l].len = s - capture[l].init;  /* close capture */
+      if ((res = match(s, p+1, level)) == NULL) /* match failed? */
+        capture[l].len = -1;  /* undo capture */
+      return res;
+    }
+    case ESC:
+      if (isdigit((unsigned char)(*(p+1)))) {  /* capture */
+        int l = check_cap(*(p+1), level);
+        if (strncmp(capture[l].init, s, capture[l].len) == 0) {
+          /* return match(p+2, s+capture[l].len, level); */
+          p+=2; s+=capture[l].len; goto init;
+        }
+        else return NULL;
+      }
+      else if (*(p+1) == 'b') {  /* balanced string */
+        if (*(p+2) == 0 || *(p+3) == 0)
+          lua_error("bad balanced pattern specification");
+        s = matchbalance(s, *(p+2), *(p+3));
+        if (s == NULL) return NULL;
+        else {  /* return match(p+4, s, level); */
+          p+=4; goto init;
+        }
+      }
+      else goto dflt;
+    case '\0': case '$':  /* (possibly) end of pattern */
+      if (*p == 0 || (*(p+1) == 0 && *s == 0)) {
+        num_captures = level;
+        return s;
+      }
+      else goto dflt;
+    default: dflt: {  /* it is a pattern item */
+      int m = luaL_singlematch(*s, p);
+      char *ep = luaL_item_end(p);  /* get what is next */
+      switch (*ep) {
+        case '*': {  /* repetition */
+          char *res;
+          if (m && (res = match(s+1, p, level)))
+            return res;
+          p=ep+1; goto init;  /* else return match(s, ep+1, level); */
+        }
+        case '-': {  /* repetition */
+          char *res;
+          if ((res = match(s, ep+1, level)) != 0)
+            return res;
+          else if (m) {
+            s++;
+            goto init;  /* return match(s+1, p, level); */
+          }
+          else
+            return NULL;
+        }
+        case '?': {  /* optional */
+          char *res;
+          if (m && (res = match(s+1, ep+1, level)))
+            return res;
+          p=ep+1; goto init;  /* else return match(s, ep+1, level); */
+        }
+        default:
+          if (m) { s++; p=ep; goto init; }  /* return match(s+1, ep, level); */
+          else return NULL;
+      }
+    }
+  }
+}
+
+static void str_find (void)
+{
+  char *s = luaL_check_string(1);
+  char *p = luaL_check_string(2);
+  long init = (long)luaL_opt_number(3, 1) - 1;
+  luaL_arg_check(0 <= init && init <= strlen(s), 3, "out of range");
+  if (lua_getparam(4) != LUA_NOOBJECT || 
+      strpbrk(p, SPECIALS) == NULL) {  /* no special caracters? */
+    char *s2 = strstr(s+init, p);
+    if (s2) {
+      lua_pushnumber(s2-s+1);
+      lua_pushnumber(s2-s+strlen(p));
+    }
+  }
+  else {
+    int anchor = (*p == '^') ? (p++, 1) : 0;
+    char *s1=s+init;
+    do {
+      char *res;
+      if ((res=match(s1, p, 0)) != NULL) {
+        lua_pushnumber(s1-s+1);  /* start */
+        lua_pushnumber(res-s);   /* end */
+        push_captures();
+        return;
+      }
+    } while (*s1++ && !anchor);
+  }
+}
+
+static void add_s (lua_Object newp, lua_Object table, int n)
+{
+  if (lua_isstring(newp)) {
+    char *news = lua_getstring(newp);
+    while (*news) {
+      if (*news != ESC || !isdigit((unsigned char)*++news))
+        luaI_addchar(*news++);
+      else {
+        int l = check_cap(*news++, num_captures);
+        addnchar(capture[l].init, capture[l].len);
+      }
+    }
+  }
+  else if (lua_isfunction(newp)) {
+    lua_Object res;
+    struct lbuff oldbuff;
+    int status;
+    lua_beginblock();
+    if (lua_istable(table)) {
+      lua_pushobject(table);
+      lua_pushnumber(n);
+    }
+    push_captures();
+    /* function may use lbuffer, so save it and create a new one */
+    oldbuff = lbuffer;
+    lbuffer.b = NULL; lbuffer.max = lbuffer.size = 0;
+    status = lua_callfunction(newp);
+    /* restore old buffer */
+    free(lbuffer.b);
+    lbuffer = oldbuff;
+    if (status != 0)
+      lua_error(NULL);
+    res = lua_getresult(1);
+    addstr(lua_isstring(res) ? lua_getstring(res) : "");
+    lua_endblock();
+  }
+  else luaL_arg_check(0, 3, NULL);
+}
+
+static void str_gsub (void)
+{
+  char *src = luaL_check_string(1);
+  char *p = luaL_check_string(2);
+  lua_Object newp = lua_getparam(3);
+  lua_Object table = lua_getparam(4);
+  int max_s = (int)luaL_opt_number(lua_istable(table)?5:4, strlen(src)+1);
+  int anchor = (*p == '^') ? (p++, 1) : 0;
+  int n = 0;
+  luaI_emptybuff();
+  while (n < max_s) {
+    char *e = match(src, p, 0);
+    if (e) {
+      n++;
+      add_s(newp, table, n);
+    }
+    if (e && e>src) /* non empty match? */
+      src = e;  /* skip it */
+    else if (*src)
+      luaI_addchar(*src++);
+    else break;
+    if (anchor) break;
+  }
+  addstr(src);
+  lua_pushstring(luaI_addchar(0));
+  lua_pushnumber(n);  /* number of substitutions */
+}
+
+static void str_set (void)
+{
+  char *item = luaL_check_string(1);
+  int i;
+  luaL_arg_check(*luaL_item_end(item) == 0, 1, "wrong format");
+  luaI_emptybuff();
+  for (i=1; i<256; i++)  /* 0 cannot be part of a set */
+    if (luaL_singlematch(i, item))
+      luaI_addchar(i);
+  lua_pushstring(luaI_addchar(0));
+}
+
+
+void luaI_addquoted (char *s)
+{
+  luaI_addchar('"');
+  for (; *s; s++) {
+    if (strchr("\"\\\n", *s))
+      luaI_addchar('\\');
+    luaI_addchar(*s);
+  }
+  luaI_addchar('"');
+}
+
+#define MAX_FORMAT 200
 
 static void str_format (void)
 {
   int arg = 1;
-  char *strfrmt = lua_check_string(arg++, "format");
-  luaI_addchar(0);  /* initialize */
-  while (*strfrmt)
-  {
+  char *strfrmt = luaL_check_string(arg++);
+  luaI_emptybuff();  /* initialize */
+  while (*strfrmt) {
     if (*strfrmt != '%')
       luaI_addchar(*strfrmt++);
     else if (*++strfrmt == '%')
       luaI_addchar(*strfrmt++);  /* %% */
-    else
-    { /* format item */
+    else { /* format item */
       char form[MAX_FORMAT];      /* store the format ('%...') */
-      char buff[MAX_CONVERTION];  /* store the formated value */
-      int size = 0;
-      int i = 0;
-      form[i++] = '%';
-      form[i] = *strfrmt++;
-      while (!isalpha(form[i]))
-      {
-        if (isdigit(form[i]))
-        {
-          size = size*10 + form[i]-'0';
-          if (size >= MAX_CONVERTION)
-            lua_error("format size/precision too long in function `format'");
-        }
-        else if (form[i] == '.')
-          size = 0;  /* re-start */
-        if (++i >= MAX_FORMAT)
-            lua_error("bad format in function `format'");
-        form[i] = *strfrmt++;
-      }
-      form[i+1] = 0;  /* ends string */
-      switch (form[i])
-      {
-        case 's':
-        {
-          char *s = lua_check_string(arg++, "format");
-          if (strlen(s) >= MAX_CONVERTION)
-            lua_error("string argument too long in function `format'");
+      char *buff;
+      char *initf = strfrmt-1;  /* -1 to include % */
+      strfrmt = match(strfrmt, "[-+ #]*(%d*)%.?(%d*)", 0);
+      if (capture[0].len > 3 || capture[1].len > 3)  /* < 1000? */
+        lua_error("invalid format (width or precision too long)");
+      strncpy(form, initf, strfrmt-initf+1); /* +1 to include convertion */
+      form[strfrmt-initf+1] = 0;
+      buff = openspace(1000);  /* to store the formated value */
+      switch (*strfrmt++) {
+        case 'q':
+          luaI_addquoted(luaL_check_string(arg++));
+          continue;
+        case 's': {
+          char *s = luaL_check_string(arg++);
+          buff = openspace(strlen(s));
           sprintf(buff, form, s);
           break;
         }
         case 'c':  case 'd':  case 'i': case 'o':
         case 'u':  case 'x':  case 'X':
-          sprintf(buff, form, (int)lua_check_number(arg++, "format"));
+          sprintf(buff, form, (int)luaL_check_number(arg++));
           break;
         case 'e':  case 'E': case 'f': case 'g':
-          sprintf(buff, form, lua_check_number(arg++, "format"));
+          sprintf(buff, form, luaL_check_number(arg++));
           break;
         default:  /* also treat cases 'pnLlh' */
           lua_error("invalid format option in function `format'");
       }
-      for (i=0; buff[i]; i++)  /* move formated value to result */
-        luaI_addchar(buff[i]);
+      lbuffer.size += strlen(buff);
     }
   }
   lua_pushstring(luaI_addchar(0));  /* push the result */
 }
 
 
+static struct luaL_reg strlib[] = {
+{"strlen", str_len},
+{"strsub", str_sub},
+{"strset", str_set},
+{"strlower", str_lower},
+{"strupper", str_upper},
+{"strrep", str_rep},
+{"ascii", str_ascii},
+{"format", str_format},
+{"strfind", str_find},
+{"gsub", str_gsub}
+};
+
+
 /*
 ** Open string library
 */
 void strlib_open (void)
 {
- lua_register ("strfind", str_find);
- lua_register ("strlen", str_len);
- lua_register ("strsub", str_sub);
- lua_register ("strlower", str_lower);
- lua_register ("strupper", str_upper);
- lua_register ("ascii", str_ascii);
- lua_register ("format",    str_format);
+  luaL_openlib(strlib, (sizeof(strlib)/sizeof(strlib[0])));
 }

table.c

@@ -3,9 +3,11 @@
 ** Module to control static tables
 */
 
-char *rcs_table="$Id: table.c,v 2.46 1996/02/14 13:35:51 roberto Exp roberto $";
+char *rcs_table="$Id: table.c,v 2.71 1997/06/09 17:28:14 roberto Exp roberto $";
 
-#include "mem.h"
+#include "luamem.h"
+#include "auxlib.h"
+#include "func.h"
 #include "opcode.h"
 #include "tree.h"
 #include "hash.h"
@@ -19,53 +21,22 @@ char *rcs_table="$Id: table.c,v 2.46 1996/02/14 13:35:51 roberto Exp roberto $";
 #define BUFFER_BLOCK 256
 
 Symbol *lua_table = NULL;
-static Word lua_ntable = 0;
+Word lua_ntable = 0;
 static Long lua_maxsymbol = 0;
 
 TaggedString **lua_constant = NULL;
-static Word lua_nconstant = 0;
+Word lua_nconstant = 0;
 static Long lua_maxconstant = 0;
 
 
-#define GARBAGE_BLOCK 1024
-#define MIN_GARBAGE_BLOCK (GARBAGE_BLOCK/2)
+#define GARBAGE_BLOCK 100
 
-static void lua_nextvar (void);
-
-/*
-** Initialise symbol table with internal functions
-*/
-static struct {
-  char *name;
-  lua_CFunction func;
-} int_funcs[] = {
-  {"nextvar", lua_nextvar},
-  {"error", luaI_error},
-  {"tonumber", lua_obj2number},
-  {"setfallback", luaI_setfallback},
-  {"next", lua_next},
-  {"dofile", lua_internaldofile},
-  {"setglobal", luaI_setglobal},
-  {"getglobal", luaI_getglobal},
-  {"type", luaI_type},
-  {"tostring", luaI_tostring},
-  {"print", luaI_print},
-  {"dostring", lua_internaldostring},
-  {"assert", luaI_assert}
-};
-
-#define INTFUNCSIZE (sizeof(int_funcs)/sizeof(int_funcs[0]))
 
 void luaI_initsymbol (void)
 {
-  int i;
   lua_maxsymbol = BUFFER_BLOCK;
   lua_table = newvector(lua_maxsymbol, Symbol);
-  for (i=0; i<INTFUNCSIZE; i++)
-  {
-    Word n = luaI_findsymbolbyname(int_funcs[i].name);
-    s_tag(n) = LUA_T_CFUNCTION; s_fvalue(n) = int_funcs[i].func;
-  }
+  luaI_predefine();
 }
 
 
@@ -76,6 +47,9 @@ void luaI_initconstant (void)
 {
  lua_maxconstant = BUFFER_BLOCK;
  lua_constant = newvector(lua_maxconstant, TaggedString *);
+ /* pre-register mem error messages, to avoid loop when error arises */
+ luaI_findconstantbyname(tableEM);
+ luaI_findconstantbyname(memEM);
 }
 
 
@@ -85,31 +59,23 @@ void luaI_initconstant (void)
 */
 Word luaI_findsymbol (TaggedString *t)
 {
- if (t->varindex == NOT_USED)
+ if (t->u.s.varindex == NOT_USED)
  {
   if (lua_ntable == lua_maxsymbol)
-  {
-   if (lua_maxsymbol >= MAX_WORD)
-     lua_error("symbol table overflow");
-   lua_maxsymbol *= 2;
-   if (lua_maxsymbol >= MAX_WORD)
-     lua_maxsymbol = MAX_WORD; 
-   lua_table = growvector(lua_table, lua_maxsymbol, Symbol);
-  }
-  t->varindex = lua_ntable;
+    lua_maxsymbol = growvector(&lua_table, lua_maxsymbol, Symbol,
+                      symbolEM, MAX_WORD);
+  t->u.s.varindex = lua_ntable;
   lua_table[lua_ntable].varname = t;
-  s_tag(lua_ntable) = LUA_T_NIL;
+  s_ttype(lua_ntable) = LUA_T_NIL;
   lua_ntable++;
-  if (!t->marked)
-    t->marked = 2;  /* avoid GC */
  }
- return t->varindex;
+ return t->u.s.varindex;
 }
 
 
 Word luaI_findsymbolbyname (char *name)
 {
-  return luaI_findsymbol(lua_createstring(name));
+  return luaI_findsymbol(luaI_createfixedstring(name));
 }
 
 
@@ -119,43 +85,43 @@ Word luaI_findsymbolbyname (char *name)
 */
 Word luaI_findconstant (TaggedString *t)
 {
- if (t->constindex == NOT_USED)
+ if (t->u.s.constindex == NOT_USED)
  {
   if (lua_nconstant == lua_maxconstant)
-  {
-   if (lua_maxconstant >= MAX_WORD)
-     lua_error("constant table overflow");
-   lua_maxconstant *= 2;
-   if (lua_maxconstant >= MAX_WORD)
-     lua_maxconstant = MAX_WORD;
-   lua_constant = growvector(lua_constant, lua_maxconstant, TaggedString *);
-  }
-  t->constindex = lua_nconstant;
+    lua_maxconstant = growvector(&lua_constant, lua_maxconstant, TaggedString *,
+                        constantEM, MAX_WORD);
+  t->u.s.constindex = lua_nconstant;
   lua_constant[lua_nconstant] = t;
   lua_nconstant++;
-  if (!t->marked)
-    t->marked = 2;  /* avoid GC */
  }
- return t->constindex;
+ return t->u.s.constindex;
 }
 
 
 Word  luaI_findconstantbyname (char *name)
 {
-  return luaI_findconstant(lua_createstring(name));
+  return luaI_findconstant(luaI_createfixedstring(name));
 }
 
-TaggedString *lua_constcreate(char *name)
+TaggedString *luaI_createfixedstring (char *name)
 {
-  int i = luaI_findconstantbyname(name);
-  return lua_constant[i];
+  TaggedString *ts = lua_createstring(name);
+  if (!ts->marked)
+    ts->marked = 2;  /* avoid GC */
+  return ts;
+}
+
+
+int luaI_globaldefined (char *name)
+{
+  return ttype(&lua_table[luaI_findsymbolbyname(name)].object) != LUA_T_NIL;
 }
 
 
 /*
 ** Traverse symbol table objects
 */
-static char *lua_travsymbol (int (*fn)(Object *))
+static char *lua_travsymbol (int (*fn)(TObject *))
 {
  Word i;
  for (i=0; i<lua_ntable; i++)
@@ -168,98 +134,122 @@ static char *lua_travsymbol (int (*fn)(Object *))
 /*
 ** Mark an object if it is a string or a unmarked array.
 */
-int lua_markobject (Object *o)
+int lua_markobject (TObject *o)
 {/* if already marked, does not change mark value */
- if (tag(o) == LUA_T_STRING && !tsvalue(o)->marked)
+ if (ttype(o) == LUA_T_USERDATA ||
+     (ttype(o) == LUA_T_STRING && !tsvalue(o)->marked))
    tsvalue(o)->marked = 1;
- else if (tag(o) == LUA_T_ARRAY)
+ else if (ttype(o) == LUA_T_ARRAY)
    lua_hashmark (avalue(o));
- else if ((o->tag == LUA_T_FUNCTION || o->tag == LUA_T_MARK)
+ else if ((o->ttype == LUA_T_FUNCTION || o->ttype == LUA_T_MARK)
            && !o->value.tf->marked)
    o->value.tf->marked = 1;
  return 0;
 }
 
+/*
+* returns 0 if the object is going to be (garbage) collected
+*/
+int luaI_ismarked (TObject *o)
+{
+  switch (o->ttype)
+  {
+   case LUA_T_STRING: case LUA_T_USERDATA:
+     return o->value.ts->marked;
+   case LUA_T_FUNCTION:
+    return o->value.tf->marked;
+   case LUA_T_ARRAY:
+    return o->value.a->mark;
+   default:  /* nil, number, cfunction, or user data */
+    return 1;
+  }
+}
+
+
+static void call_nilIM (void)
+{ /* signals end of garbage collection */
+  TObject t;
+  ttype(&t) = LUA_T_NIL;
+  luaI_gcIM(&t);  /* end of list */
+}
 
 /*
 ** Garbage collection. 
 ** Delete all unused strings and arrays.
 */
-Long luaI_collectgarbage (void)
+static long gc_block = GARBAGE_BLOCK;
+static long gc_nentity = 0;  /* total of strings, arrays, etc */
+
+static void markall (void)
 {
-  Long recovered = 0;
   lua_travstack(lua_markobject); /* mark stack objects */
   lua_travsymbol(lua_markobject); /* mark symbol table objects */
   luaI_travlock(lua_markobject); /* mark locked objects */
   luaI_travfallbacks(lua_markobject);  /* mark fallbacks */
-  recovered += lua_strcollector();
-  recovered += lua_hashcollector();
-  recovered += luaI_funccollector();
+}
+
+
+long lua_collectgarbage (long limit)
+{
+  long recovered = 0;
+  Hash *freetable;
+  TaggedString *freestr;
+  TFunc *freefunc;
+  markall();
+  luaI_invalidaterefs();
+  freetable = luaI_hashcollector(&recovered);
+  freestr = luaI_strcollector(&recovered);
+  freefunc = luaI_funccollector(&recovered);
+  gc_nentity -= recovered;
+  gc_block = (limit == 0) ? 2*(gc_block-recovered) : gc_nentity+limit;
+  luaI_hashcallIM(freetable);
+  luaI_strcallIM(freestr);
+  call_nilIM();
+  luaI_hashfree(freetable);
+  luaI_strfree(freestr);
+  luaI_funcfree(freefunc);
   return recovered;
 } 
 
+
 void lua_pack (void)
 {
-  static Long block = GARBAGE_BLOCK; /* when garbage collector will be called */
-  static Long nentity = 0;  /* counter of new entities (strings and arrays) */
-  Long recovered = 0;
-  if (nentity++ < block) return;
-  recovered = luaI_collectgarbage();
-  nentity = 0;				/* reset counter */
-  block=(16*block-7*recovered)/12;	/* adapt block size */
-  if (block < MIN_GARBAGE_BLOCK) block = MIN_GARBAGE_BLOCK;
+  if (++gc_nentity >= gc_block)
+    lua_collectgarbage(0);
 } 
 
 
 /*
 ** Internal function: return next global variable
 */
-static void lua_nextvar (void)
+void luaI_nextvar (void)
 {
- Word next;
- lua_Object o = lua_getparam(1);
- if (o == LUA_NOOBJECT)
-   lua_error("too few arguments to function `nextvar'");
- if (lua_getparam(2) != LUA_NOOBJECT)
-   lua_error("too many arguments to function `nextvar'");
- if (lua_isnil(o))
-   next = 0;
- else if (!lua_isstring(o))
- {
-   lua_error("incorrect argument to function `nextvar'"); 
-   return;  /* to avoid warnings */
- }
- else
-   next = luaI_findsymbolbyname(lua_getstring(o)) + 1;
- while (next < lua_ntable && s_tag(next) == LUA_T_NIL) next++;
- if (next >= lua_ntable)
- {
-  lua_pushnil();
-  lua_pushnil();
- }
- else
- {
-  TaggedString *t = lua_table[next].varname;
-  Object name;
-  tag(&name) = LUA_T_STRING;
-  tsvalue(&name) = t;
-  luaI_pushobject(&name);
-  luaI_pushobject(&s_object(next));
- }
+  Word next;
+  if (lua_isnil(lua_getparam(1)))
+    next = 0;
+  else 
+    next = luaI_findsymbolbyname(luaL_check_string(1)) + 1;
+  while (next < lua_ntable && s_ttype(next) == LUA_T_NIL)
+    next++;
+  if (next < lua_ntable) {
+    lua_pushstring(lua_table[next].varname->str);
+    luaI_pushobject(&s_object(next));
+  }
 }
 
 
-static Object *functofind;
-static int checkfunc (Object *o)
+static TObject *functofind;
+static int checkfunc (TObject *o)
 {
-  if (o->tag == LUA_T_FUNCTION)
+  if (o->ttype == LUA_T_FUNCTION)
     return
-       ((functofind->tag == LUA_T_FUNCTION || functofind->tag == LUA_T_MARK)
+       ((functofind->ttype == LUA_T_FUNCTION || functofind->ttype == LUA_T_MARK)
             && (functofind->value.tf == o->value.tf));
-  if (o->tag == LUA_T_CFUNCTION)
+  if (o->ttype == LUA_T_CFUNCTION)
     return
-       ((functofind->tag == LUA_T_CFUNCTION || functofind->tag == LUA_T_CMARK)
-            && (functofind->value.f == o->value.f));
+       ((functofind->ttype == LUA_T_CFUNCTION ||
+         functofind->ttype == LUA_T_CMARK) &&
+         (functofind->value.f == o->value.f));
   return 0;
 }
 
@@ -268,7 +258,7 @@ char *lua_getobjname (lua_Object o, char **name)
 { /* try to find a name for given function */
   functofind = luaI_Address(o);
   if ((*name = luaI_travfallbacks(checkfunc)) != NULL)
-    return "fallback";
+    return "tag-method";
   else if ((*name = lua_travsymbol(checkfunc)) != NULL)
     return "global";
   else return "";

table.h

@@ -1,7 +1,7 @@
 /*
 ** Module to control static tables
 ** TeCGraf - PUC-Rio
-** $Id: table.h,v 2.17 1996/02/12 18:32:40 roberto Exp roberto $
+** $Id: table.h,v 2.24 1997/04/07 14:48:53 roberto Exp roberto $
 */
 
 #ifndef table_h
@@ -12,13 +12,15 @@
 
 typedef struct
 {
- Object  object;
+ TObject  object;
  TaggedString *varname;
 } Symbol;
 
 
 extern Symbol *lua_table;
+extern Word lua_ntable;
 extern TaggedString **lua_constant;
+extern Word lua_nconstant;
 
 void luaI_initsymbol (void);
 void  luaI_initconstant (void);
@@ -26,9 +28,11 @@ Word  luaI_findsymbolbyname (char *name);
 Word  luaI_findsymbol      (TaggedString *t);
 Word  luaI_findconstant    (TaggedString *t);
 Word  luaI_findconstantbyname (char *name);
-TaggedString *lua_constcreate  (char *str);
-int   lua_markobject      (Object *o);
-Long luaI_collectgarbage (void);
+int luaI_globaldefined (char *name);
+void luaI_nextvar (void);
+TaggedString *luaI_createfixedstring  (char *str);
+int   lua_markobject      (TObject *o);
+int luaI_ismarked (TObject *o);
 void  lua_pack            (void);
 
 

tree.c

@@ -3,17 +3,18 @@
 ** TecCGraf - PUC-Rio
 */
  
-char *rcs_tree="$Id: tree.c,v 1.17 1996/02/14 13:35:51 roberto Exp roberto $";
+char *rcs_tree="$Id: tree.c,v 1.27 1997/06/09 17:28:14 roberto Exp roberto $";
 
 
 #include <string.h>
 
-#include "mem.h"
+#include "luamem.h"
 #include "lua.h"
 #include "tree.h"
 #include "lex.h"
 #include "hash.h"
 #include "table.h"
+#include "fallback.h"
 
 
 #define NUM_HASHS  64
@@ -28,23 +29,43 @@ static int initialized = 0;
 
 static stringtable string_root[NUM_HASHS];
 
-static TaggedString EMPTY = {NOT_USED, NOT_USED, 0, 2, {0}};
+static TaggedString EMPTY = {LUA_T_STRING, NULL, {{NOT_USED, NOT_USED}},
+                             0, 2, {0}};
 
 
-static unsigned long hash (char *str)
+static unsigned long hash (char *s, int tag)
 {
-  unsigned long h = 0;
-  while (*str)
-    h = ((h<<5)-h)^(unsigned char)*(str++);
+  unsigned long h;
+  if (tag != LUA_T_STRING)
+    h = (unsigned long)s;
+  else {
+    h = 0;
+    while (*s)
+      h = ((h<<5)-h)^(unsigned char)*(s++);
+  }
   return h;
 }
 
+
+static void luaI_inittree (void)
+{
+  int i;
+  for (i=0; i<NUM_HASHS; i++) {
+    string_root[i].size = 0;
+    string_root[i].nuse = 0;
+    string_root[i].hash = NULL;
+  }
+}
+
+
 static void initialize (void)
 {
   initialized = 1;
+  luaI_inittree();
   luaI_addReserved();
   luaI_initsymbol();
   luaI_initconstant();
+  luaI_initfallbacks();
 }
 
 
@@ -55,28 +76,45 @@ static void grow (stringtable *tb)
   int i;
   for (i=0; i<newsize; i++)
     newhash[i] = NULL;
-  if (tb->size > 0)
-  { /* rehash */
-    tb->nuse = 0;
-    for (i=0; i<tb->size; i++)
-      if (tb->hash[i] != NULL && tb->hash[i] != &EMPTY)
-      {
-        int h = tb->hash[i]->hash%newsize;
-        while (newhash[h])
-          h = (h+1)%newsize;
-        newhash[h] = tb->hash[i];
-        tb->nuse++;
-      }
-    luaI_free(tb->hash); 
-  }
+  /* rehash */
+  tb->nuse = 0;
+  for (i=0; i<tb->size; i++)
+    if (tb->hash[i] != NULL && tb->hash[i] != &EMPTY) {
+      int h = tb->hash[i]->hash%newsize;
+      while (newhash[h])
+        h = (h+1)%newsize;
+      newhash[h] = tb->hash[i];
+      tb->nuse++;
+    }
+  luaI_free(tb->hash); 
   tb->size = newsize;
   tb->hash = newhash;
 }
 
-static TaggedString *insert (char *str, stringtable *tb)
+
+static TaggedString *newone(char *buff, int tag, unsigned long h)
 {
   TaggedString *ts;
-  unsigned long h = hash(str);
+  if (tag == LUA_T_STRING) {
+    ts = (TaggedString *)luaI_malloc(sizeof(TaggedString)+strlen(buff));
+    strcpy(ts->str, buff);
+    ts->u.s.varindex = ts->u.s.constindex = NOT_USED;
+    ts->tag = LUA_T_STRING;
+  }
+  else {
+    ts = (TaggedString *)luaI_malloc(sizeof(TaggedString));
+    ts->u.v = buff;
+    ts->tag = tag == LUA_ANYTAG ? 0 : tag;
+  }
+  ts->marked = 0;
+  ts->hash = h;
+  return ts;
+}
+
+static TaggedString *insert (char *buff, int tag, stringtable *tb)
+{
+  TaggedString *ts;
+  unsigned long h = hash(buff, tag);
   int i;
   int j = -1;
   if ((Long)tb->nuse*3 >= (Long)tb->size*2)
@@ -86,40 +124,65 @@ static TaggedString *insert (char *str, stringtable *tb)
     grow(tb);
   }
   i = h%tb->size;
-  while (tb->hash[i])
+  while ((ts = tb->hash[i]) != NULL)
   {
-    if (tb->hash[i] == &EMPTY)
+    if (ts == &EMPTY)
       j = i;
-    else if (strcmp(str, tb->hash[i]->str) == 0)
-      return tb->hash[i];
+    else if ((ts->tag == LUA_T_STRING) ?
+              (tag == LUA_T_STRING && (strcmp(buff, ts->str) == 0)) :
+              ((tag == ts->tag || tag == LUA_ANYTAG) && buff == ts->u.v))
+      return ts;
     i = (i+1)%tb->size;
   }
   /* not found */
+  lua_pack();
   if (j != -1)  /* is there an EMPTY space? */
     i = j;
   else
     tb->nuse++;
-  ts = tb->hash[i] = (TaggedString *)luaI_malloc(sizeof(TaggedString)+strlen(str));
-  strcpy(ts->str, str);
-  ts->marked = 0;
-  ts->hash = h;
-  ts->varindex = ts->constindex = NOT_USED;
+  ts = tb->hash[i] = newone(buff, tag, h);
   return ts;
 }
 
-TaggedString *lua_createstring (char *str) 
+TaggedString *luaI_createudata (void *udata, int tag)
 {
-  return insert(str, &string_root[(unsigned)str[0]%NUM_HASHS]);
+  return insert(udata, tag, &string_root[(unsigned)udata%NUM_HASHS]);
+}
+
+TaggedString *lua_createstring (char *str)
+{
+  return insert(str, LUA_T_STRING, &string_root[(unsigned)str[0]%NUM_HASHS]);
+}
+
+
+void luaI_strcallIM (TaggedString *l)
+{
+  TObject o;
+  ttype(&o) = LUA_T_USERDATA;
+  for (; l; l=l->next) {
+    tsvalue(&o) = l;
+    luaI_gcIM(&o);
+  }
+}
+
+
+void luaI_strfree (TaggedString *l)
+{
+  while (l) {
+    TaggedString *next = l->next;
+    luaI_free(l);
+    l = next;
+  }
 }
 
 
 /*
 ** Garbage collection function.
-** This function traverse the string list freeing unindexed strings
 */
-Long lua_strcollector (void)
+TaggedString *luaI_strcollector (long *acum)
 {
   Long counter = 0;
+  TaggedString *frees = NULL;
   int i;
   for (i=0; i<NUM_HASHS; i++)
   {
@@ -134,13 +197,15 @@ Long lua_strcollector (void)
           t->marked = 0;
         else
         {
-          luaI_free(t);
+          t->next = frees;
+          frees = t;
           tb->hash[j] = &EMPTY;
           counter++;
         }
       }
     }
   }
-  return counter;
+  *acum += counter;
+  return frees;
 }
 

tree.h

@@ -1,7 +1,7 @@
 /*
 ** tree.h
 ** TecCGraf - PUC-Rio
-** $Id: tree.h,v 1.12 1996/02/12 18:32:40 roberto Exp roberto $
+** $Id: tree.h,v 1.17 1997/05/14 18:38:29 roberto Exp roberto $
 */
 
 #ifndef tree_h
@@ -14,8 +14,15 @@
 
 typedef struct TaggedString
 {
-  unsigned short varindex;  /* != NOT_USED  if this is a symbol */
-  unsigned short constindex;  /* != NOT_USED  if this is a constant */
+  int tag;  /* if != LUA_T_STRING, this is a userdata */
+  struct TaggedString *next;
+  union {
+    struct {
+      Word varindex;  /* != NOT_USED  if this is a symbol */
+      Word constindex;  /* != NOT_USED  if this is a constant */
+    } s;
+    void *v;  /* if this is a userdata, here is its value */
+  } u;
   unsigned long hash;  /* 0 if not initialized */
   int marked;   /* for garbage collection; never collect (nor change) if > 1 */
   char str[1];   /* \0 byte already reserved */
@@ -23,6 +30,9 @@ typedef struct TaggedString
  
 
 TaggedString *lua_createstring (char *str);
-Long lua_strcollector (void);
+TaggedString *luaI_createudata (void *udata, int tag);
+TaggedString *luaI_strcollector (long *cont);
+void luaI_strfree (TaggedString *l);
+void luaI_strcallIM (TaggedString *l);
 
 #endif

ugly.h

@@ -1,36 +0,0 @@
-/*
-** ugly.h
-** TecCGraf - PUC-Rio
-** $Id: $
-*/
-
-#ifndef ugly_h
-#define ugly_h
-
-/* This enum must have the same order of the array 'reserved' in lex.c */
-
-enum {
- U_and=128,
- U_do,
- U_else,
- U_elseif,
- U_end,
- U_function,
- U_if,
- U_local,
- U_nil,
- U_not,
- U_or,
- U_repeat,
- U_return,
- U_then,
- U_until,
- U_while,
- U_eq = '='+128,
- U_le = '<'+128,
- U_ge = '>'+128,
- U_ne = '~'+128,
- U_sc = '.'+128
-};
-
-#endif

undump.c

@@ -0,0 +1,330 @@
+/*
+** undump.c
+** load bytecodes from files
+*/
+
+char* rcs_undump="$Id: undump.c,v 1.23 1997/06/16 16:50:22 roberto Exp roberto $";
+
+#include <stdio.h>
+#include <string.h>
+#include "auxlib.h"
+#include "opcode.h"
+#include "luamem.h"
+#include "table.h"
+#include "undump.h"
+#include "zio.h"
+
+static int swapword=0;
+static int swapfloat=0;
+static TFunc* Main=NULL;			/* functions in a chunk */
+static TFunc* lastF=NULL;
+
+static void FixCode(Byte* code, Byte* end)	/* swap words */
+{
+ Byte* p;
+ for (p=code; p!=end;)
+ {
+	int op=*p;
+	switch (op)
+	{
+	case PUSHNIL:
+	case PUSH0:
+	case PUSH1:
+	case PUSH2:
+	case PUSHLOCAL0:
+	case PUSHLOCAL1:
+	case PUSHLOCAL2:
+	case PUSHLOCAL3:
+	case PUSHLOCAL4:
+	case PUSHLOCAL5:
+	case PUSHLOCAL6:
+	case PUSHLOCAL7:
+	case PUSHLOCAL8:
+	case PUSHLOCAL9:
+	case PUSHINDEXED:
+	case STORELOCAL0:
+	case STORELOCAL1:
+	case STORELOCAL2:
+	case STORELOCAL3:
+	case STORELOCAL4:
+	case STORELOCAL5:
+	case STORELOCAL6:
+	case STORELOCAL7:
+	case STORELOCAL8:
+	case STORELOCAL9:
+	case STOREINDEXED0:
+	case ADJUST0:
+	case EQOP:
+	case LTOP:
+	case LEOP:
+	case GTOP:
+	case GEOP:
+	case ADDOP:
+	case SUBOP:
+	case MULTOP:
+	case DIVOP:
+	case POWOP:
+	case CONCOP:
+	case MINUSOP:
+	case NOTOP:
+	case POP:
+	case RETCODE0:
+		p++;
+		break;
+	case PUSHBYTE:
+	case PUSHLOCAL:
+	case STORELOCAL:
+	case STOREINDEXED:
+	case STORELIST0:
+	case ADJUST:
+	case RETCODE:
+	case VARARGS:
+	case STOREMAP:
+		p+=2;
+		break;
+	case STORELIST:
+	case CALLFUNC:
+		p+=3;
+		break;
+	case PUSHFUNCTION:
+		p+=5;			/* TODO: use sizeof(TFunc*) or old? */
+		break;
+	case PUSHWORD:
+	case PUSHSELF:
+	case CREATEARRAY:
+	case ONTJMP:
+	case ONFJMP:
+	case JMP:
+	case UPJMP:
+	case IFFJMP:
+	case IFFUPJMP:
+	case SETLINE:
+	case PUSHSTRING:
+	case PUSHGLOBAL:
+	case STOREGLOBAL:
+	{
+		Byte t;
+		t=p[1]; p[1]=p[2]; p[2]=t;
+		p+=3;
+		break;
+	}
+	case PUSHFLOAT:			/* assumes sizeof(float)==4 */
+	{
+		Byte t;
+		t=p[1]; p[1]=p[4]; p[4]=t;
+		t=p[2]; p[2]=p[3]; p[3]=t;
+		p+=5;
+		break;
+	}
+	case STORERECORD:
+	{
+		int n=*++p;
+		p++;
+		while (n--)
+		{
+			Byte t;
+			t=p[0]; p[0]=p[1]; p[1]=t;
+			p+=2;
+		}
+		break;
+	}
+	default:
+		luaL_verror("corrupt binary file: bad opcode %d at %d\n",
+			op,(int)(p-code));
+		break;
+	}
+ }
+}
+
+static void Unthread(Byte* code, int i, int v)
+{
+ while (i!=0)
+ {
+  Word w;
+  Byte* p=code+i;
+  memcpy(&w,p,sizeof(w));
+  i=w; w=v;
+  memcpy(p,&w,sizeof(w));
+ }
+}
+
+static int LoadWord(ZIO* Z)
+{
+ Word w;
+ zread(Z,&w,sizeof(w));
+ if (swapword)
+ {
+  Byte* p=(Byte*)&w;
+  Byte t;
+  t=p[0]; p[0]=p[1]; p[1]=t;
+ }
+ return w;
+}
+
+static int LoadSize(ZIO* Z)
+{
+ Word hi=LoadWord(Z);
+ Word lo=LoadWord(Z);
+ int s=(hi<<16)|lo;
+ if ((Word)s != s) lua_error("code too long");
+ return s;
+}
+
+static void* LoadBlock(int size, ZIO* Z)
+{
+ void* b=luaI_malloc(size);
+ zread(Z,b,size);
+ return b;
+}
+
+static char* LoadString(ZIO* Z)
+{
+ int size=LoadWord(Z);
+ char *b=luaI_buffer(size);
+ zread(Z,b,size);
+ return b;
+}
+
+static char* LoadNewString(ZIO* Z)
+{
+ return LoadBlock(LoadWord(Z),Z);
+}
+
+static void LoadFunction(ZIO* Z)
+{
+ TFunc* tf=new(TFunc);
+ tf->next=NULL;
+ tf->locvars=NULL;
+ tf->size=LoadSize(Z);
+ tf->lineDefined=LoadWord(Z);
+ if (IsMain(tf))				/* new main */
+ {
+  tf->fileName=LoadNewString(Z);
+  Main=lastF=tf;
+ }
+ else						/* fix PUSHFUNCTION */
+ {
+  tf->marked=LoadWord(Z);
+  tf->fileName=Main->fileName;
+  memcpy(Main->code+tf->marked,&tf,sizeof(tf));
+  lastF=lastF->next=tf;
+ }
+ tf->code=LoadBlock(tf->size,Z);
+ if (swapword || swapfloat) FixCode(tf->code,tf->code+tf->size);
+ while (1)					/* unthread */
+ {
+  int c=zgetc(Z);
+  if (c==ID_VAR)				/* global var */
+  {
+   int i=LoadWord(Z);
+   char* s=LoadString(Z);
+   int v=luaI_findsymbolbyname(s);
+   Unthread(tf->code,i,v);
+  }
+  else if (c==ID_STR)				/* constant string */
+  {
+   int i=LoadWord(Z);
+   char* s=LoadString(Z);
+   int v=luaI_findconstantbyname(s);
+   Unthread(tf->code,i,v);
+  }
+  else
+  {
+   zungetc(Z);
+   break;
+  }
+ }
+}
+
+static void LoadSignature(ZIO* Z)
+{
+ char* s=SIGNATURE;
+ while (*s!=0 && zgetc(Z)==*s)
+  ++s;
+ if (*s!=0) lua_error("cannot load binary file: bad signature");
+}
+
+static void LoadHeader(ZIO* Z)
+{
+ Word w,tw=TEST_WORD;
+ float f,tf=TEST_FLOAT;
+ int version;
+ LoadSignature(Z);
+ version=zgetc(Z);
+ if (version>0x23)				/* after 2.5 */
+ {
+  int oldsizeofW=zgetc(Z);
+  int oldsizeofF=zgetc(Z);
+  int oldsizeofP=zgetc(Z);
+  if (oldsizeofW!=2)
+   luaL_verror(
+	"cannot load binary file created on machine with sizeof(Word)=%d; "
+	"expected 2",oldsizeofW);
+  if (oldsizeofF!=4)
+   luaL_verror(
+	"cannot load binary file created on machine with sizeof(float)=%d; "
+	"expected 4\nnot an IEEE machine?",oldsizeofF);
+  if (oldsizeofP!=sizeof(TFunc*))		/* TODO: pack? */
+   luaL_verror(
+	"cannot load binary file created on machine with sizeof(TFunc*)=%d; "
+	"expected %d",oldsizeofP,(int)sizeof(TFunc*));
+ }
+ zread(Z,&w,sizeof(w));			/* test word */
+ if (w!=tw)
+ {
+  swapword=1;
+ }
+ zread(Z,&f,sizeof(f));			/* test float */
+ if (f!=tf)
+ {
+  Byte* p=(Byte*)&f;
+  Byte t;
+  swapfloat=1;
+  t=p[0]; p[0]=p[3]; p[3]=t;
+  t=p[1]; p[1]=p[2]; p[2]=t;
+  if (f!=tf)					/* TODO: try another perm? */
+   lua_error("cannot load binary file: unknown float representation");
+ }
+}
+
+static void LoadChunk(ZIO* Z)
+{
+ LoadHeader(Z);
+ while (1)
+ {
+  int c=zgetc(Z);
+  if (c==ID_FUN) LoadFunction(Z); else { zungetc(Z); break; }
+ }
+}
+
+/*
+** load one chunk from a file.
+** return list of functions found, headed by main, or NULL at EOF.
+*/
+TFunc* luaI_undump1(ZIO* Z)
+{
+ int c=zgetc(Z);
+ if (c==ID_CHUNK)
+ {
+  LoadChunk(Z);
+  return Main;
+ }
+ else if (c!=EOZ)
+   lua_error("not a lua binary file");
+ return NULL;
+}
+
+/*
+** load and run all chunks in a file
+*/
+int luaI_undump(ZIO* Z)
+{
+ TFunc* m;
+ while ((m=luaI_undump1(Z)))
+ {
+  int status=luaI_dorun(m);
+  luaI_freefunc(m);
+  if (status!=0) return status;
+ }
+ return 0;
+}

undump.h

@@ -0,0 +1,30 @@
+/*
+** undump.h
+** definitions for lua decompiler
+** $Id: undump.h,v 1.5 1997/06/16 16:50:22 roberto Exp roberto $
+*/
+
+#ifndef undump_h
+#define undump_h
+
+#include "func.h"
+#include "zio.h"
+
+#define IsMain(f)	(f->lineDefined==0)
+
+/* definitions for chunk headers */
+
+#define ID_CHUNK	27		/* ESC */
+#define ID_FUN		'F'
+#define ID_VAR		'V'
+#define ID_STR		'S'
+#define	SIGNATURE	"Lua"
+#define	VERSION		0x25		/* last format change was in 2.5 */
+#define	TEST_WORD	0x1234		/* a word for testing byte ordering */
+#define	TEST_FLOAT	0.123456789e-23	/* a float for testing representation */
+
+
+TFunc* luaI_undump1(ZIO* Z);
+int luaI_undump(ZIO* Z);		/* load all chunks */
+
+#endif

zio.c

@@ -0,0 +1,79 @@
+/*
+* zio.c
+* a generic input stream interface
+* $Id: zio.c,v 1.1 1997/06/16 16:50:22 roberto Exp roberto $
+*/
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include "zio.h"
+
+
+/* ----------------------------------------------------- memory buffers --- */
+
+static int zmfilbuf(ZIO* z)
+{
+ return EOZ;
+}
+
+ZIO* zmopen(ZIO* z, char* b, int size)
+{
+ if (b==NULL) return NULL;
+ z->n=size;
+ z->p= (unsigned char *)b;
+ z->filbuf=zmfilbuf;
+ z->u=NULL;
+ return z;
+}
+
+/* ------------------------------------------------------------ strings --- */
+
+ZIO* zsopen(ZIO* z, char* s)
+{
+ if (s==NULL) return NULL;
+ return zmopen(z,s,strlen(s));
+}
+
+/* -------------------------------------------------------------- FILEs --- */
+
+static int zffilbuf(ZIO* z)
+{
+ int n=fread(z->buffer,1,ZBSIZE,z->u);
+ if (n==0) return EOZ;
+ z->n=n-1;
+ z->p=z->buffer;
+ return *(z->p++);
+}
+
+
+ZIO* zFopen(ZIO* z, FILE* f)
+{
+ if (f==NULL) return NULL;
+ z->n=0;
+ z->p=z->buffer;
+ z->filbuf=zffilbuf;
+ z->u=f;
+ return z;
+}
+
+
+/* --------------------------------------------------------------- read --- */
+int zread(ZIO *z, void *b, int n)
+{
+  while (n) {
+    int m;
+    if (z->n == 0) {
+      if (z->filbuf(z) == EOZ)
+        return n;  /* retorna quantos faltaram ler */
+      zungetc(z);  /* poe o resultado de filbuf no buffer */
+    }
+    m = (n <= z->n) ? n : z->n;  /* minimo de n e z->n */
+    memcpy(b, z->p, m);
+    z->n -= m;
+    z->p += m;
+    b = (char *)b + m;
+    n -= m;
+  }
+  return 0;
+}

zio.h

@@ -0,0 +1,48 @@
+/*
+* zio.h
+* a generic input stream interface
+* $Id: zio.h,v 1.4 1997/06/19 18:55:28 roberto Exp roberto $
+*/
+
+#ifndef zio_h
+#define zio_h
+
+#include <stdio.h>
+
+
+
+/* For Lua only */
+#define zFopen	luaZ_Fopen
+#define zsopen	luaZ_sopen
+#define zmopen	luaZ_mopen
+#define zread	luaZ_read
+
+#define EOZ	(-1)			/* end of stream */
+
+typedef struct zio ZIO;
+
+ZIO* zFopen(ZIO* z, FILE* f);		/* open FILEs */
+ZIO* zsopen(ZIO* z, char* s);		/* string */
+ZIO* zmopen(ZIO* z, char* b, int size);	/* memory */
+
+int zread(ZIO* z, void* b, int n);	/* read next n bytes */
+
+#define zgetc(z)	(--(z)->n>=0 ? ((int)*(z)->p++): (z)->filbuf(z))
+#define zungetc(z)	(++(z)->n,--(z)->p)
+
+
+
+/* --------- Private Part ------------------ */
+
+#define ZBSIZE	256			/* buffer size */
+
+struct zio {
+ int n;					/* bytes still unread */
+ unsigned char* p;			/* current position in buffer */
+ int (*filbuf)(ZIO* z);
+ void* u;				/* additional data */
+ unsigned char buffer[ZBSIZE];		/* buffer */
+};
+
+
+#endif