list of incompatibilities with version 2.2.

new macro \Version.

fallback.c

@@ -0,0 +1,184 @@
+/*
+** fallback.c
+** TecCGraf - PUC-Rio
+*/
+ 
+char *rcs_fallback="$Id: fallback.c,v 1.18 1996/01/30 15:25:23 roberto Exp roberto $";
+
+#include <stdio.h>
+#include <string.h>
+ 
+#include "mem.h"
+#include "fallback.h"
+#include "opcode.h"
+#include "lua.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);
+
+
+/*
+** Warning: This list must be in the same order as the #define's
+*/
+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'");
+}
+
+
+static void errorFB (void)
+{
+  lua_Object o = lua_getparam(1);
+  if (lua_isstring(o))
+    fprintf (stderr, "lua: %s\n", lua_getstring(o));
+  else
+    fprintf(stderr, "lua: unknown error\n");
+}
+ 
+
+static void indexFB (void)
+{
+  lua_pushnil();
+}
+ 
+
+static void gettableFB (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");
+}
+
+
+static void orderFB (void)
+{
+  lua_error("unexpected type at comparison");
+}
+
+static void GDFB (void) { }
+
+static void funcFB (void)
+{
+  lua_error("call expression not a function");
+}
+
+
+/*
+** Lock routines
+*/
+
+static Object *lockArray = NULL;
+static Word lockSize = 0;
+
+int luaI_lock (Object *object)
+{
+  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;
+    }
+  /* no more empty spaces */
+  oldSize = lockSize;
+  if (lockArray == NULL)
+  {
+    lockSize = 10;
+    lockArray = newvector(lockSize, Object);
+  }
+  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;
+}

fallback.h

@@ -0,0 +1,35 @@
+/*
+** $Id: fallback.h,v 1.10 1995/10/17 11:52:38 roberto Exp roberto $
+*/
+ 
+#ifndef fallback_h
+#define fallback_h
+
+#include "opcode.h"
+
+extern struct FB {
+  char *kind;
+  Object function;
+  int nParams;
+  int nResults;
+} luaI_fallBacks[];
+
+#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
+
+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 *));
+
+#endif
+

func.c

@@ -0,0 +1,163 @@
+#include <stdio.h>
+
+#include "luadebug.h"
+#include "table.h"
+#include "mem.h"
+#include "func.h"
+#include "opcode.h"
+
+#define LOCALVARINITSIZE 10
+
+static TFunc *function_root = NULL;
+static LocVar *currvars = NULL;
+static int numcurrvars = 0;
+static int maxcurrvars = 0;
+
+
+/*
+** Initialize TFunc struct
+*/
+void luaI_initTFunc (TFunc *f)
+{
+  f->code = NULL;
+  f->lineDefined = 0;
+  f->locvars = NULL;
+}
+
+/*
+** Insert function in list for GC
+*/
+void luaI_insertfunction (TFunc *f)
+{
+  lua_pack();
+  f->next = function_root;
+  function_root = f;
+  f->marked = 0;
+}
+
+
+/*
+** Free function
+*/
+static void freefunc (TFunc *f)
+{
+  luaI_free (f->code);
+  if (f->locvars)
+    luaI_free (f->locvars);
+  luaI_free (f);
+}
+
+/*
+** Garbage collection function.
+** This function traverse the function list freeing unindexed functions
+*/
+Long luaI_funccollector (void)
+{
+  TFunc *curr = function_root;
+  TFunc *prev = NULL;
+  Long counter = 0;
+  while (curr)
+  {
+    TFunc *next = curr->next;
+    if (!curr->marked)
+    {
+      if (prev == NULL)
+        function_root = next;
+      else
+        prev->next = next;
+      freefunc (curr);
+      ++counter;
+    }
+    else
+    {
+      curr->marked = 0;
+      prev = curr;
+    } 
+    curr = next;
+  }
+  return counter;
+}
+
+
+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)
+  {
+    *filename = f->value.tf->fileName;
+    *linedefined = f->value.tf->lineDefined;
+  }
+  else if (f->tag == LUA_T_CMARK || f->tag == LUA_T_CFUNCTION)
+  {
+    *filename = "(C)";
+    *linedefined = -1;
+  }
+}
+
+/*
+** Stores information to know that variable has been declared in given line
+*/
+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);
+    }
+  currvars[numcurrvars].varname = varname;
+  currvars[numcurrvars].line = line;
+  numcurrvars++;
+}
+
+/*
+** Stores information to know that variable has been out of scope in given line
+*/
+void luaI_unregisterlocalvar (int line)
+{
+  luaI_registerlocalvar(NULL, line);
+}
+
+/*
+** Copies "currvars" into a new area and store it in function header.
+** The values (varname = NULL, line = -1) signal the end of vector.
+*/
+void luaI_closelocalvars (TFunc *func)
+{
+  func->locvars = newvector (numcurrvars+1, LocVar);
+  memcpy (func->locvars, currvars, numcurrvars*sizeof(LocVar));
+  func->locvars[numcurrvars].varname = NULL;
+  func->locvars[numcurrvars].line = -1;
+  numcurrvars = 0;  /* prepares for next function */
+}
+
+/*
+** Look for n-esim local variable at line "line" in function "func".
+** Returns NULL if not found.
+*/
+char *luaI_getlocalname (TFunc *func, int local_number, int line)
+{
+  int count = 0;
+  char *varname = NULL;
+  LocVar *lv = func->locvars;
+  if (lv == NULL)
+    return NULL;
+  for (; lv->line != -1 && lv->line < line; lv++)
+  {
+    if (lv->varname)               /* register */
+    {
+      if (++count == local_number)
+        varname = lv->varname->str;
+    }
+    else                           /* unregister */
+      if (--count < local_number)
+        varname = NULL;
+  }
+  return varname;
+}
+

func.h

@@ -0,0 +1,38 @@
+#ifndef func_h
+#define func_h
+
+#include "types.h"
+#include "lua.h"
+
+typedef struct LocVar
+{
+  TaggedString *varname;           /* NULL signals end of scope */
+  int       line;
+} LocVar;
+
+
+/*
+** Function Headers
+*/
+typedef struct TFunc
+{
+  struct TFunc	*next;
+  char		marked;
+  int		size;
+  Byte		*code;
+  int		lineDefined;
+  char		*fileName;
+  LocVar        *locvars;
+} TFunc;
+
+Long luaI_funccollector (void);
+void luaI_insertfunction (TFunc *f);
+
+void luaI_initTFunc (TFunc *f);
+
+void luaI_registerlocalvar (TaggedString *varname, int line);
+void luaI_unregisterlocalvar (int line);
+void luaI_closelocalvars (TFunc *func);
+char *luaI_getlocalname (TFunc *func, int local_number, int line);
+
+#endif

hash.c

@@ -1,172 +1,275 @@
 /*
 ** hash.c
 ** hash manager for lua
-** Luiz Henrique de Figueiredo - 17 Aug 90
-** Modified by Waldemar Celes Filho
-** 12 May 93
 */
 
-#include <string.h>
-#include <stdlib.h>
+char *rcs_hash="$Id: hash.c,v 2.28 1996/02/12 18:32:40 roberto Exp roberto $";
 
+
+#include "mem.h"
 #include "opcode.h"
 #include "hash.h"
-#include "inout.h"
 #include "table.h"
 #include "lua.h"
 
-#define streq(s1,s2)	(strcmp(s1,s2)==0)
-#define strneq(s1,s2)	(strcmp(s1,s2)!=0)
-
-#define new(s)		((s *)malloc(sizeof(s)))
-#define newvector(n,s)	((s *)calloc(n,sizeof(s)))
 
 #define nhash(t)	((t)->nhash)
-#define nodelist(t)	((t)->list)
-#define list(t,i)	((t)->list[i])
-#define ref_tag(n)	(tag(&(n)->ref))
-#define ref_nvalue(n)	(nvalue(&(n)->ref))
-#define ref_svalue(n)	(svalue(&(n)->ref))
+#define nuse(t)		((t)->nuse)
+#define markarray(t)    ((t)->mark)
+#define nodevector(t)	((t)->node)
+#define node(t,i)	(&(t)->node[i])
+#define ref(n)		(&(n)->ref)
+#define val(n)		(&(n)->val)
 
-static int head (Hash *t, Object *ref)		/* hash function */
+
+#define REHASH_LIMIT    0.70    /* avoid more than this % full */
+
+
+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 */
+
+Word luaI_redimension (Word nhash)
 {
- if (tag(ref) == T_NUMBER) return (((int)nvalue(ref))%nhash(t));
- else if (tag(ref) == T_STRING)
+ Word i;
+ for (i=0; dimensions[i]!=0; i++)
  {
-  int h;
-  char *name = svalue(ref);
-  for (h=0; *name!=0; name++)		/* interpret name as binary number */
+  if (dimensions[i] > nhash)
+   return dimensions[i];
+ }
+ lua_error("table overflow");
+ 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)
+{
+  if (tag(t1) != tag(t2)) return 0;
+  switch (tag(t1))
   {
-   h <<= 8;
-   h  += (unsigned char) *name;		/* avoid sign extension */
-   h  %= nhash(t);			/* make it a valid index */
+    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_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);
   }
-  return h;
- }
- else
- {
-  lua_reportbug ("unexpected type to index table");
-  return -1;
- }
 }
 
-static Node *present(Hash *t, Object *ref, int h)
-{
- Node *n=NULL, *p;
- if (tag(ref) == T_NUMBER)
+static Word present (Hash *t, Object *ref)
+{ 
+ Word h = hashindex(t, ref);
+ while (tag(ref(node(t, h))) != LUA_T_NIL)
  {
-  for (p=NULL,n=list(t,h); n!=NULL; p=n, n=n->next)
-   if (ref_tag(n) == T_NUMBER && nvalue(ref) == ref_nvalue(n)) break;
- }  
- else if (tag(ref) == T_STRING)
- {
-  for (p=NULL,n=list(t,h); n!=NULL; p=n, n=n->next)
-   if (ref_tag(n) == T_STRING && streq(svalue(ref),ref_svalue(n))) break;
- }  
- if (n==NULL)				/* name not present */
-  return NULL;
-#if 0
- if (p!=NULL)				/* name present but not first */
- {
-  p->next=n->next;			/* move-to-front self-organization */
-  n->next=list(t,h);
-  list(t,h)=n;
+  if (lua_equalObj(ref, ref(node(t, h))))
+    return h;
+  h = (h+1) % nhash(t);
  }
-#endif
- return n;
+ return h;
 }
 
-static void freelist (Node *n)
+
+/*
+** Alloc a vector node 
+*/
+static Node *hashnodecreate (Word nhash)
 {
- while (n)
- {
-  Node *next = n->next;
-  free (n);
-  n = next;
- }
+ Word i;
+ Node *v = newvector (nhash, Node);
+ for (i=0; i<nhash; i++)
+   tag(ref(&v[i])) = LUA_T_NIL;
+ return v;
 }
 
 /*
 ** Create a new hash. Return the hash pointer or NULL on error.
 */
-Hash *lua_hashcreate (unsigned int nhash)
+static Hash *hashcreate (Word nhash)
 {
- Hash *t = new (Hash);
- if (t == NULL)
- {
-  lua_error ("not enough memory");
-  return NULL;
- }
+ Hash *t = new(Hash);
+ nhash = luaI_redimension((Word)((float)nhash/REHASH_LIMIT));
+ nodevector(t) = hashnodecreate(nhash);
  nhash(t) = nhash;
+ nuse(t) = 0;
  markarray(t) = 0;
- nodelist(t) = newvector (nhash, Node*);
- if (nodelist(t) == NULL)
- {
-  lua_error ("not enough memory");
-  return NULL;
- }
  return t;
 }
 
 /*
 ** Delete a hash
 */
-void lua_hashdelete (Hash *h)
+static void hashdelete (Hash *t)
 {
- int i;
- for (i=0; i<nhash(h); i++)
-  freelist (list(h,i));
- free (nodelist(h));
- free(h);
+ luaI_free (nodevector(t));
+ luaI_free(t);
 }
 
-/*
-** If the hash node is present, return its pointer, otherwise create a new
-** node for the given reference and also return its pointer.
-** On error, return NULL.
-*/
-Object *lua_hashdefine (Hash *t, Object *ref)
-{
- int   h;
- Node *n;
- h = head (t, ref);
- if (h < 0) return NULL; 
- 
- n = present(t, ref, h);
- if (n == NULL)
- {
-  n = new(Node);
-  if (n == NULL)
-  {
-   lua_error ("not enough memory");
-   return NULL;
-  }
-  n->ref = *ref;
-  tag(&n->val) = T_NIL;
-  n->next = list(t,h);			/* link node to head of list */
-  list(t,h) = n;
- }
- return (&n->val);
-}
 
 /*
 ** Mark a hash and check its elements 
 */
 void lua_hashmark (Hash *h)
 {
- int i;
- 
- markarray(h) = 1;
- 
- for (i=0; i<nhash(h); i++)
+ if (markarray(h) == 0)
  {
-  Node *n;
-  for (n = list(h,i); n != NULL; n = n->next)
+  Word i;
+  markarray(h) = 1;
+  for (i=0; i<nhash(h); i++)
   {
-   lua_markobject (&n->ref);
-   lua_markobject (&n->val);
+   Node *n = node(h,i);
+   if (tag(ref(n)) != LUA_T_NIL)
+   {
+    lua_markobject(&n->ref);
+    lua_markobject(&n->val);
+   }
   }
+ } 
+}
+
+
+static void call_fallbacks (void)
+{
+  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 */
+}
+
+ 
+/*
+** Garbage collection to arrays
+** Delete all unmarked arrays.
+*/
+Long lua_hashcollector (void)
+{
+ 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;
+  }
+  else
+  {
+   markarray(curr_array) = 0;
+   prev = curr_array;
+  }
+  curr_array = next;
  }
+ return counter;
+}
+
+
+/*
+** Create a new array
+** This function inserts the new array in the array list. It also
+** executes garbage collection if the number of arrays created
+** exceed a pre-defined range.
+*/
+Hash *lua_createarray (Word nhash)
+{
+ Hash *array;
+ lua_pack();
+ array = hashcreate(nhash);
+ array->next = listhead;
+ listhead = array;
+ return array;
+}
+
+
+/*
+** Re-hash
+*/
+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);
+}
+
+/*
+** If the hash node is present, return its pointer, otherwise return
+** null.
+*/
+Object *lua_hashget (Hash *t, Object *ref)
+{
+ Word h = present(t, ref);
+ if (tag(ref(node(t, h))) != LUA_T_NIL) return val(node(t, h));
+ else return NULL;
+}
+
+
+/*
+** 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)
+{
+ 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);
+  }
+  *ref(n) = *ref;
+  tag(val(n)) = LUA_T_NIL;
+ }
+ return (val(n));
 }
 
 
@@ -176,84 +279,44 @@ void lua_hashmark (Hash *h)
 ** in the hash.
 ** This function pushs the element value and its reference to the stack.
 */
-#include "lua.h"
-static void firstnode (Hash *a, int h)
+static void hashnext (Hash *t, Word i)
 {
- if (h < nhash(a))
- {  
-  int i;
-  for (i=h; i<nhash(a); 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))
   {
-   if (list(a,i) != NULL && tag(&list(a,i)->val) != T_NIL)
-   {
-    lua_pushobject (&list(a,i)->ref);
-    lua_pushobject (&list(a,i)->val);
-    return;
-   }
+   lua_pushnil(); lua_pushnil();
+   return;
   }
  }
- lua_pushnil();
- lua_pushnil();
+ luaI_pushobject(ref(node(t,i)));
+ luaI_pushobject(val(node(t,i)));
 }
+
 void lua_next (void)
 {
- Hash   *a;
- Object *o = lua_getparam (1);
- Object *r = lua_getparam (2);
- if (o == NULL || r == NULL)
- { lua_error ("too few arguments to function `next'"); return; }
- if (lua_getparam (3) != NULL)
- { lua_error ("too many arguments to function `next'"); return; }
- if (tag(o) != T_ARRAY)
- { lua_error ("first argument of function `next' is not a table"); return; }
- a = avalue(o);
- if (tag(r) == T_NIL)
+ 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))
  {
-  firstnode (a, 0);
-  return;
+  hashnext(t, 0);
  }
  else
  {
-  int h = head (a, r);
-  if (h >= 0)
-  {
-   Node *n = list(a,h);
-   while (n)
-   {
-    if (memcmp(&n->ref,r,sizeof(Object)) == 0)
-    {
-     if (n->next == NULL)
-     {
-      firstnode (a, h+1);
-      return;
-     }
-     else if (tag(&n->next->val) != T_NIL)
-     {
-      lua_pushobject (&n->next->ref);
-      lua_pushobject (&n->next->val);
-      return;
-     }
-     else
-     {
-      Node *next = n->next->next;
-      while (next != NULL && tag(&next->val) == T_NIL) next = next->next;
-      if (next == NULL)
-      {
-       firstnode (a, h+1);
-       return;
-      }
-      else
-      {
-       lua_pushobject (&next->ref);
-       lua_pushobject (&next->val);
-      }
-      return;
-     }
-    }
-    n = n->next;
-   }
-   if (n == NULL)
-    lua_error ("error in function 'next': reference not found");
-  }
+  Word h = present (t, luaI_Address(r));
+  hashnext(t, h+1);
  }
 }

hash.h

@@ -2,34 +2,38 @@
 ** hash.h
 ** hash manager for lua
 ** Luiz Henrique de Figueiredo - 17 Aug 90
-** Modified by Waldemar Celes Filho
-** 26 Apr 93
+** $Id: hash.h,v 2.9 1996/02/07 14:13:17 roberto Exp roberto $
 */
 
 #ifndef hash_h
 #define hash_h
 
+#include "types.h"
+#include "opcode.h"
+
 typedef struct node
 {
  Object ref;
  Object val;
- struct node *next;
 } Node;
 
 typedef struct Hash
 {
+ struct Hash   *next;
  char           mark;
- unsigned int   nhash;
- Node         **list;
+ Word          nhash;
+ Word           nuse;
+ Node          *node;
 } Hash;
 
-#define markarray(t)		((t)->mark)
 
-Hash 	*lua_hashcreate (unsigned int nhash);
-void 	 lua_hashdelete (Hash *h);
+int      lua_equalObj (Object *t1, Object *t2);
+Word     luaI_redimension (Word nhash);
+Hash    *lua_createarray (Word nhash);
+void     lua_hashmark (Hash *h);
+Long     lua_hashcollector (void);
+Object  *lua_hashget (Hash *t, Object *ref);
 Object 	*lua_hashdefine (Hash *t, Object *ref);
-void 	 lua_hashmark   (Hash *h);
-
 void     lua_next (void);
 
 #endif

inout.c

@@ -2,59 +2,43 @@
 ** inout.c
 ** Provide function to realise the input/output function and debugger 
 ** facilities.
-**
-** Waldemar Celes Filho
-** TeCGraf - PUC-Rio
-** 11 May 93
+** Also provides some predefined lua functions.
 */
 
-#include <stdio.h>
-#include <string.h>
+char *rcs_inout="$Id: inout.c,v 2.31 1996/02/13 17:30:39 roberto Exp roberto $";
 
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "lex.h"
 #include "opcode.h"
-#include "hash.h"
 #include "inout.h"
 #include "table.h"
+#include "tree.h"
+#include "lua.h"
+
+
+#ifndef MAXFUNCSTACK
+#define MAXFUNCSTACK 100
+#endif
+
+#define MAXMESSAGE MAXFUNCSTACK*80
+
 
 /* Exported variables */
-int lua_linenumber;
-int lua_debug;
-int lua_debugline;
+Word lua_linenumber;
+char *lua_parsedfile;
 
-/* Internal variables */
-#ifndef MAXFUNCSTACK
-#define MAXFUNCSTACK 32
-#endif
-static struct { int file; int function; } funcstack[MAXFUNCSTACK];
-static int nfuncstack=0;
 
 static FILE *fp;
 static char *st;
-static void (*usererror) (char *s);
-
-/*
-** Function to set user function to handle errors.
-*/
-void lua_errorfunction (void (*fn) (char *s))
-{
- usererror = fn;
-}
 
 /*
 ** Function to get the next character from the input file
 */
 static int fileinput (void)
 {
- int c = fgetc (fp);
- return (c == EOF ? 0 : c);
-}
-
-/*
-** Function to unget the next character from to input file
-*/
-static void fileunput (int c)
-{
- ungetc (c, fp);
+ return fgetc (fp);
 }
 
 /*
@@ -62,30 +46,27 @@ static void fileunput (int c)
 */
 static int stringinput (void)
 {
- st++;
- return (*(st-1));
-}
-
-/*
-** Function to unget the next character from to input string
-*/
-static void stringunput (int c)
-{
- st--;
+ return *st++;
 }
 
 /*
 ** Function to open a file to be input unit. 
-** Return 0 on success or 1 on error.
+** Return 0 on success or 1 error.
 */
 int lua_openfile (char *fn)
 {
- lua_linenumber = 1;
  lua_setinput (fileinput);
- lua_setunput (fileunput);
- fp = fopen (fn, "r");
- if (fp == NULL) return 1;
- if (lua_addfile (fn)) return 1;
+ 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;
 }
 
@@ -94,7 +75,7 @@ int lua_openfile (char *fn)
 */
 void lua_closefile (void)
 {
- if (fp != NULL)
+ if (fp != NULL && fp != stdin)
  {
   fclose (fp);
   fp = NULL;
@@ -104,85 +85,173 @@ void lua_closefile (void)
 /*
 ** Function to open a string to be input unit
 */
-int lua_openstring (char *s)
+void lua_openstring (char *s)
 {
- lua_linenumber = 1;
  lua_setinput (stringinput);
- lua_setunput (stringunput);
  st = s;
- {
-  char sn[64];
-  sprintf (sn, "String: %10.10s...", s);
-  if (lua_addfile (sn)) return 1;
- }
- return 0;
+ lua_linenumber = 1;
+ lua_parsedfile = lua_constcreate("(string)")->str;
 }
 
 /*
-** Call user function to handle error messages, if registred. Or report error
-** using standard function (fprintf).
+** Function to close an opened string
 */
-void lua_error (char *s)
+void lua_closestring (void)
 {
- if (usererror != NULL) usererror (s);
- else			    fprintf (stderr, "lua: %s\n", s);
+}
+
+ 
+/*
+** Internal function: do a string
+*/
+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();
 }
 
 /*
-** Called to execute  SETFUNCTION opcode, this function pushs a function into
-** function stack. Return 0 on success or 1 on error.
+** Internal function: do a file
 */
-int lua_pushfunction (int file, int function)
+void lua_internaldofile (void)
 {
- if (nfuncstack >= MAXFUNCSTACK-1)
- {
-  lua_error ("function stack overflow");
-  return 1;
- }
- funcstack[nfuncstack].file = file;
- funcstack[nfuncstack].function = function;
- nfuncstack++;
- return 0;
+ 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();
+}
+ 
+
+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;
+}
+
+void luaI_tostring (void)
+{
+  lua_pushstring(tostring(lua_getparam(1)));
+}
+
+void luaI_print (void)
+{
+  int i = 1;
+  lua_Object obj;
+  while ((obj = lua_getparam(i++)) != LUA_NOOBJECT)
+    printf("%s\n", tostring(obj));
 }
 
 /*
-** Called to execute  RESET opcode, this function pops a function from 
-** function stack.
+** Internal function: return an object type.
 */
-void lua_popfunction (void)
+void luaI_type (void)
 {
- nfuncstack--;
-}
-
-/*
-** Report bug building a message and sending it to lua_error function.
-*/
-void lua_reportbug (char *s)
-{
- char msg[1024];
- strcpy (msg, s);
- if (lua_debugline != 0)
- {
-  int i;
-  if (nfuncstack > 0)
+  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)
   {
-   sprintf (strchr(msg,0), 
-         "\n\tin statement begining at line %d in function \"%s\" of file \"%s\"",
-         lua_debugline, s_name(funcstack[nfuncstack-1].function),
-  	 lua_file[funcstack[nfuncstack-1].file]);
-   sprintf (strchr(msg,0), "\n\tactive stack\n");
-   for (i=nfuncstack-1; i>=0; i--)
-    sprintf (strchr(msg,0), "\t-> function \"%s\" of file \"%s\"\n", 
-                            s_name(funcstack[i].function),
-			    lua_file[funcstack[i].file]);
+    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);
+}
+ 
+/*
+** Internal function: convert an object to a number
+*/
+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
-  {
-   sprintf (strchr(msg,0),
-         "\n\tin statement begining at line %d of file \"%s\"", 
-         lua_debugline, lua_filename());
-  }
- }
- lua_error (msg);
+    lua_pushnil();
 }
 
+
+void luaI_error (void)
+{
+  char *s = lua_getstring(lua_getparam(1));
+  if (s == NULL) s = "(no message)";
+  lua_error(s);
+}
+
+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)
+{
+  lua_Object name = lua_getparam(1);
+  lua_Object value = lua_getparam(2);
+  if (!lua_isstring(name))
+    lua_error("incorrect argument to function `setglobal'");
+  lua_pushobject(value);
+  lua_storeglobal(lua_getstring(name));
+  lua_pushobject(value);  /* return given value */
+}
+
+void luaI_getglobal (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)));
+}

inout.h

@@ -1,24 +1,32 @@
 /*
-** inout.h
-**
-** Waldemar Celes Filho
-** TeCGraf - PUC-Rio
-** 11 May 93
+** $Id: inout.h,v 1.12 1996/01/26 14:05:28 roberto Exp roberto $
 */
 
 
 #ifndef inout_h
 #define inout_h
 
-extern int lua_linenumber;
-extern int lua_debug;
-extern int lua_debugline;
+#include "types.h"
+
+
+extern Word lua_linenumber;
+extern Word lua_debugline;
+extern char *lua_parsedfile;
 
 int  lua_openfile     (char *fn);
 void lua_closefile    (void);
-int  lua_openstring   (char *s);
-int  lua_pushfunction (int file, int function);
-void lua_popfunction  (void);
-void lua_reportbug    (char *s);
+void lua_openstring   (char *s);
+void lua_closestring  (void);
+
+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

@@ -1,65 +1,82 @@
 /*
 ** iolib.c
 ** Input/output library to LUA
-**
-** Waldemar Celes Filho
-** TeCGraf - PUC-Rio
-** 19 May 93
 */
 
-#include <stdlib.h>
-#include <string.h>
+char *rcs_iolib="$Id: iolib.c,v 1.35 1996/02/09 19:35:23 roberto Exp roberto $";
+
 #include <stdio.h>
 #include <ctype.h>
-#ifdef __GNUC__
-#include <floatingpoint.h>
-#endif
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <string.h>
+#include <time.h>
+#include <stdlib.h>
+#include <errno.h>
 
 #include "lua.h"
+#include "luadebug.h"
+#include "lualib.h"
 
 static FILE *in=stdin, *out=stdout;
 
+
+#ifdef POPEN
+FILE *popen();
+int pclose();
+#else
+#define popen(x,y) NULL  /* that is, popen always fails */
+#define pclose(x)  (-1)
+#endif
+
+
+static void closeread (void)
+{
+  if (in != stdin)
+  {
+    if (pclose(in) == -1)
+      fclose(in);
+    in = stdin;
+  }
+}
+
+static void closewrite (void)
+{
+  if (out != stdout)
+  {
+    if (pclose(out) == -1)
+      fclose(out);
+    out = stdout;
+  }
+}
+
 /*
 ** Open a file to read.
 ** LUA interface:
 **			status = readfrom (filename)
 ** where:
 **			status = 1 -> success
-**			status = 0 -> error
+**			status = nil -> error
 */
 static void io_readfrom (void)
 {
- lua_Object o = lua_getparam (1);
- if (o == NULL)			/* restore standart input */
- {
-  if (in != stdin)
-  {
-   fclose (in);
-   in = stdin;
-  }
+ if (lua_getparam (1) == LUA_NOOBJECT)	
+ { /* restore standart input */
+  closeread();
   lua_pushnumber (1);
  }
  else
  {
-  if (!lua_isstring (o))
-  {
-   lua_error ("incorrect argument to function 'readfrom`");
-   lua_pushnumber (0);
-  }
-  else
-  {
-   FILE *fp = fopen (lua_getstring(o),"r");
+   char *s = lua_check_string(1, "readfrom");
+   FILE *fp = (*s == '|') ? popen(s+1, "r") : fopen(s, "r");
    if (fp == NULL)
-   {
-    lua_pushnumber (0);
-   }
+    lua_pushnil();
    else
    {
-    if (in != stdin) fclose (in);
+    closeread();
     in = fp;
     lua_pushnumber (1);
    }
-  }
  }
 }
 
@@ -70,45 +87,96 @@ static void io_readfrom (void)
 **			status = writeto (filename)
 ** where:
 **			status = 1 -> success
-**			status = 0 -> error
+**			status = nil -> error
 */
 static void io_writeto (void)
 {
- lua_Object o = lua_getparam (1);
- if (o == NULL)			/* restore standart output */
+ if (lua_getparam (1) == LUA_NOOBJECT)	/* restore standart output */
  {
-  if (out != stdout)
-  {
-   fclose (out);
-   out = stdout;
-  }
+  closewrite();
   lua_pushnumber (1);
  }
  else
  {
-  if (!lua_isstring (o))
-  {
-   lua_error ("incorrect argument to function 'writeto`");
-   lua_pushnumber (0);
-  }
-  else
-  {
-   FILE *fp = fopen (lua_getstring(o),"w");
+   char *s = lua_check_string(1, "writeto");
+   FILE *fp = (*s == '|') ? popen(s+1,"w") : fopen(s,"w");
    if (fp == NULL)
-   {
-    lua_pushnumber (0);
-   }
+    lua_pushnil();
    else
    {
-    if (out != stdout) fclose (out);
+    closewrite();
     out = fp;
     lua_pushnumber (1);
    }
-  }
  }
 }
 
 
+/*
+** 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');
+  }
+  else
+    *m = -1;
+  if (*f == '.')
+  {
+    f++;	/* skip point */
+    *n = 0;
+    while (isdigit(*f))
+      *n = *n*10 + (*f++ - '0');
+  }
+  else
+    *n = -1;
+  return t;
+}
+
+
 /*
 ** Read a variable. On error put nil on stack.
 ** LUA interface:
@@ -123,116 +191,130 @@ static void io_writeto (void)
 **	Estes especificadores podem vir seguidos de numero que representa
 **	o numero de campos a serem lidos.
 */
-static void io_read (void)
+
+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)
 {
- lua_Object o = lua_getparam (1);
- if (o == NULL)			/* free format */
- {
   int c;
-  char s[256];
   while (isspace(c=fgetc(in)))
    ;
-  if (c == '\"')
+  if (c == EOF)
   {
-   if (fscanf (in, "%[^\"]\"", s) != 1)
-   {
-    lua_pushnil ();
+    lua_pushnil();
     return;
-   }
   }
-  else if (c == '\'')
-  {
-   if (fscanf (in, "%[^\']\'", s) != 1)
-   {
-    lua_pushnil ();
-    return;
-   }
+  if (c == '\"' || c == '\'')
+  { /* string */
+    c = read_until_char(c);
+    if (c == EOF)
+      lua_pushnil();
+    else
+      lua_pushstring(luaI_addchar(0));
   }
   else
   {
-   char *ptr;
-   double d;
-   ungetc (c, in);
-   if (fscanf (in, "%s", s) != 1)
-   {
-    lua_pushnil ();
-    return;
-   }
-   d = strtod (s, &ptr);
-   if (!(*ptr))
-   {
-    lua_pushnumber (d);
-    return;
-   }
-  }
-  lua_pushstring (s);
-  return;
- }
- else				/* formatted */
- {
-  char *e = lua_getstring(o);
-  char t;
-  int  m=0;
-  while (isspace(*e)) e++;
-  t = *e++;
-  while (isdigit(*e))
-   m = m*10 + (*e++ - '0');
-  
-  if (m > 0)
-  {
-   char f[80];
-   char s[256];
-   sprintf (f, "%%%ds", m);
-   fscanf (in, f, s);
-   switch (tolower(t))
-   {
-    case 'i':
-    {
-     long int l;
-     sscanf (s, "%ld", &l);
-     lua_pushnumber(l);
-    }
-    break;
-    case 'f': case 'g': case 'e':
-    {
-     float f;
-     sscanf (s, "%f", &f);
-     lua_pushnumber(f);
-    }
-    break;
-    default: 
-     lua_pushstring(s); 
-    break;
-   }
-  }
-  else
-  {
-   switch (tolower(t))
-   {
-    case 'i':
-    {
-     long int l;
-     fscanf (in, "%ld", &l);
-     lua_pushnumber(l);
-    }
-    break;
-    case 'f': case 'g': case 'e':
-    {
-     float f;
-     fscanf (in, "%f", &f);
-     lua_pushnumber(f);
-    }
-    break;
-    default: 
-    {
-     char s[256];
-     fscanf (in, "%s", s);
+    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);
-    }
-    break;
-   }
   }
- }
+}
+
+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)");
+    }
+  }
+}
+
+
+/*
+** 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));
 }
 
 
@@ -262,131 +344,260 @@ static void io_read (void)
 **			inteiros -> numero minimo de digitos
 **			string -> nao se aplica
 */
-static char *buildformat (char *e, lua_Object o)
-{
- static char buffer[512];
- static char f[80];
- char *string = &buffer[255];
- char t, j='r';
- int  m=0, n=0, l;
- while (isspace(*e)) e++;
- t = *e++;
- if (*e == '<' || *e == '|' || *e == '>') j = *e++;
- while (isdigit(*e))
-  m = m*10 + (*e++ - '0');
- e++;	/* skip point */
- while (isdigit(*e))
-  n = n*10 + (*e++ - '0');
 
- sprintf(f,"%%");
- if (j == '<' || j == '|') sprintf(strchr(f,0),"-");
- if (m != 0)   sprintf(strchr(f,0),"%d", m);
- if (n != 0)   sprintf(strchr(f,0),".%d", n);
- sprintf(strchr(f,0), "%c", t);
- switch (tolower(t))
- {
-  case 'i': t = 'i';
-   sprintf (string, f, (long int)lua_getnumber(o));
-  break;
-  case 'f': case 'g': case 'e': t = 'f';
-   sprintf (string, f, (float)lua_getnumber(o));
-  break;
-  case 's': t = 's';
-   sprintf (string, f, lua_getstring(o));
-  break;
-  default: return "";
- }
- l = strlen(string);
- if (m!=0 && l>m)
- {
-  int i;
-  for (i=0; i<m; i++)
-   string[i] = '*';
-  string[i] = 0;
- }
- else if (m!=0 && j=='|')
- {
-  int i=l-1;
-  while (isspace(string[i])) i--;
-  string -= (m-i) / 2;
-  i=0;
-  while (string[i]==0) string[i++] = ' ';
-  string[l] = 0;
- }
- return string;
+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);
+    }
+    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);
+}
+
+
 static void io_write (void)
 {
- lua_Object o1 = lua_getparam (1);
- lua_Object o2 = lua_getparam (2);
- if (o1 == NULL)			/* new line */
- {
-  fprintf (out, "\n");
-  lua_pushnumber(1);
- }
- else if (o2 == NULL)   		/* free format */
- {
-  int status=0;
-  if (lua_isnumber(o1))
-   status = fprintf (out, "%g", lua_getnumber(o1));
-  else if (lua_isstring(o1))
-   status = fprintf (out, "%s", lua_getstring(o1));
-  lua_pushnumber(status);
- }
- else					/* formated */
- {
-  if (!lua_isstring(o2))
-  { 
-   lua_error ("incorrect format to function `write'"); 
-   lua_pushnumber(0);
-   return;
+  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;
   }
-  lua_pushnumber(fprintf (out, "%s", buildformat(lua_getstring(o2),o1)));
- }
-}
-
-/*
-** Execute a executable program using "sustem".
-** On error put 0 on stack, otherwise put 1.
-*/
-void io_execute (void)
-{
- lua_Object o = lua_getparam (1);
- if (o == NULL || !lua_isstring (o))
- {
-  lua_error ("incorrect argument to function 'execute`");
-  lua_pushnumber (0);
- }
- else
- {
-  system(lua_getstring(o));
-  lua_pushnumber (1);
- }
- return;
-}
-
-/*
-** Remove a file.
-** On error put 0 on stack, otherwise put 1.
-*/
-void io_remove  (void)
-{
- lua_Object o = lua_getparam (1);
- if (o == NULL || !lua_isstring (o))
- {
-  lua_error ("incorrect argument to function 'execute`");
-  lua_pushnumber (0);
- }
- else
- {
-  if (remove(lua_getstring(o)) == 0)
-   lua_pushnumber (1);
+  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_pushnumber (0);
- }
- return;
+    lua_pushnil();
 }
 
+/*
+** Execute a executable program using "system".
+** Return the result of execution.
+*/
+static void io_execute (void)
+{
+  lua_pushnumber(system(lua_check_string(1, "execute")));
+}
+
+/*
+** 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();
+}
+
+static void io_errorno (void)
+{
+/*  lua_pushstring(strerror(errno));*/
+}
+
+
+/*
+** To get a environment variable
+*/
+static void io_getenv (void)
+{
+ char *env = getenv(lua_check_string(1, "getenv"));
+ if (env == NULL) lua_pushnil();
+ else             lua_pushstring(env); 
+}
+
+/*
+** 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");
+}
+ 
+/*
+** 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);
+}
+
+/*
+** To debug a lua program. Start a dialog with the user, interpreting
+   lua commands until an 'cont'.
+*/
+static void io_debug (void)
+{
+  while (1)
+  {
+    char buffer[250];
+    fprintf(stderr, "lua_debug> ");
+    if (gets(buffer) == 0) return;
+    if (strcmp(buffer, "cont") == 0) return;
+    lua_dostring(buffer);
+  }
+}
+
+
+void lua_printstack (FILE *f)
+{
+  int level = 0;
+  lua_Object func;
+  fprintf(f, "Active Stack:\n");
+  while ((func = lua_stackedfunction(level++)) != LUA_NOOBJECT)
+  {
+    char *name;
+    int currentline;
+    fprintf(f, "\t");
+    switch (*lua_getobjname(func, &name))
+    {
+      case 'g':
+        fprintf(f, "function %s", name);
+        break;
+      case 'f':
+        fprintf(f, "fallback %s", name);
+        break;
+      default:
+      {
+        char *filename;
+        int linedefined;
+        lua_funcinfo(func, &filename, &linedefined);
+        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);
+      }
+    }
+    if ((currentline = lua_currentline(func)) > 0)
+      fprintf(f, "  at line %d", currentline);
+    fprintf(f, "\n");
+  }
+}
+
+
+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);
+  lua_printstack(stderr);
+}
+
+
 /*
 ** Open io library
 */
@@ -394,8 +605,40 @@ 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);
 }
+
+/*
+** 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

@@ -0,0 +1,349 @@
+char *rcs_lex = "$Id: lex.c,v 2.27 1996/02/14 13:35:51 roberto Exp roberto $";
+ 
+
+#include <ctype.h>
+#include <string.h>
+#include <stdio.h>
+
+#include "mem.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 next() { current = input(); }
+#define save(x) { *yytextLast++ = (x); }
+#define save_and_next()  { save(current); next(); }
+
+static int current;
+static char *yytext = NULL;
+static int textsize = 0;
+static char *yytextLast;
+
+static Input input;
+
+void lua_setinput (Input fn)
+{
+  current = ' ';
+  input = fn;
+  if (yytext == NULL)
+  {
+    textsize = MINBUFF;
+    yytext = newvector(textsize, char);
+  }
+}
+
+char *lua_lasttext (void)
+{
+  *yytextLast = 0;
+  return yytext;
+}
+
+
+static struct
+  {
+    char *name;
+    int token;
+  } reserved [] = {
+      {"and", AND},
+      {"do", DO},
+      {"else", ELSE},
+      {"elseif", ELSEIF},
+      {"end", END},
+      {"function", FUNCTION},
+      {"if", IF},
+      {"local", LOCAL},
+      {"nil", NIL},
+      {"not", NOT},
+      {"or", OR},
+      {"repeat", REPEAT},
+      {"return", RETURN},
+      {"then", THEN},
+      {"until", UNTIL},
+      {"while", WHILE} };
+
+
+#define RESERVEDSIZE (sizeof(reserved)/sizeof(reserved[0]))
+
+
+void luaI_addReserved (void)
+{
+  int i;
+  for (i=0; i<RESERVEDSIZE; i++)
+  {
+    TaggedString *ts = lua_createstring(reserved[i].name);
+    ts->marked = reserved[i].token;  /* reserved word  (always > 255) */
+  }
+}
+
+
+static void growtext (void)
+{
+  int size = yytextLast - yytext;
+  textsize *= 2;
+  yytext = growvector(yytext, textsize, char);
+  yytextLast = yytext + size;
+}
+
+
+static int read_long_string (void)
+{
+  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--;
+    }
+  }
+}
+
+
+int luaY_lex (void)
+{
+  float a;
+  static int linelasttoken = 0;
+  if (lua_debug)
+    luaI_codedebugline(linelasttoken);
+  linelasttoken = lua_linenumber;
+  while (1)
+  {
+    yytextLast = yytext;
+#if 0
+    fprintf(stderr,"'%c' %d\n",current,current);
+#endif
+    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':
+        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);
+        continue;
+
+      case '[':
+        save_and_next();
+        if (current != '[') return '[';
+        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;
+        }
+
+      case '=':
+        save_and_next();
+        if (current != '=') return '=';
+        else { save_and_next(); return EQ; }
+
+      case '<':
+        save_and_next();
+        if (current != '=') return '<';
+        else { save_and_next(); return LE; }
+
+      case '>':
+        save_and_next();
+        if (current != '=') return '>';
+        else { save_and_next(); return GE; }
+
+      case '~':
+        save_and_next();
+        if (current != '=') return '~';
+        else { save_and_next(); return NE; }
+
+      case '"':
+      case '\'':
+      {
+        int del = current;
+        int spaceleft = textsize - (yytextLast - yytext);
+        next();  /* skip the delimiter */
+        while (current != del)
+        {
+          if (spaceleft <= 2) /* may read more than 1 char in one cicle */
+          {
+            growtext();
+            spaceleft = textsize - (yytextLast - yytext);
+          }
+          spaceleft--;
+          switch (current)
+          {
+            case EOF:
+            case 0:
+            case '\n':
+              return WRONGTOKEN;
+            case '\\':
+              next();  /* do not save the '\' */
+              switch (current)
+              {
+                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;
+              }
+              break;
+            default:
+              save_and_next();
+          }
+        }
+        next();  /* skip the delimiter */
+        *yytextLast = 0;
+        luaY_lval.vWord = luaI_findconstantbyname(yytext);
+        return STRING;
+      }
+
+      case 'a': case 'b': case 'c': case 'd': case 'e':
+      case 'f': case 'g': case 'h': case 'i': case 'j':
+      case 'k': case 'l': case 'm': case 'n': case 'o':
+      case 'p': case 'q': case 'r': case 's': case 't':
+      case 'u': case 'v': case 'w': case 'x': case 'y':
+      case 'z':
+      case 'A': case 'B': case 'C': case 'D': case 'E':
+      case 'F': case 'G': case 'H': case 'I': case 'J':
+      case 'K': case 'L': case 'M': case 'N': case 'O':
+      case 'P': case 'Q': case 'R': case 'S': case 'T':
+      case 'U': case 'V': case 'W': case 'X': case 'Y':
+      case 'Z':
+      case '_':
+      {
+        TaggedString *ts;
+        do { save_and_next(); } while (isalnum(current) || current == '_');
+        *yytextLast = 0;
+        ts = lua_createstring(yytext);
+        if (ts->marked > 2)
+          return ts->marked;  /* reserved word */
+        luaY_lval.pTStr = ts;
+        ts->marked = 2;  /* avoid GC */
+        return NAME;
+      }
+
+      case '.':
+        save_and_next();
+        if (current == '.')
+        {
+          save_and_next();
+          return CONC;
+        }
+        else if (!isdigit(current)) return '.';
+        /* current is a digit: goes through to number */
+	a=0.0;
+        goto fraction;
+
+      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()};
+          if (current == 'e' || current == 'E')
+          {
+	    int e=0;
+	    int neg;
+	    float 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 (e & 1) a*=ea;
+	      ea*=ea;
+	    }
+          }
+          luaY_lval.vFloat = a;
+          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 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 */
+      {
+        save_and_next();
+        return yytext[0];
+      }
+    }
+  }
+}

lex.h

@@ -0,0 +1,19 @@
+/*
+** lex.h
+** TecCGraf - PUC-Rio
+** $Id: lex.h,v 1.1 1996/02/13 17:30:39 roberto Exp roberto $
+*/
+
+#ifndef lex_h
+#define lex_h
+
+
+typedef int  (*Input) (void);
+
+void    lua_setinput   (Input fn);
+char   *lua_lasttext   (void);
+int     luaY_lex (void);
+void luaI_addReserved (void);
+
+
+#endif

lex_yy.c

@@ -1,923 +0,0 @@
-# include "stdio.h"
-# define U(x) x
-# define NLSTATE yyprevious=YYNEWLINE
-# define BEGIN yybgin = yysvec + 1 +
-# define INITIAL 0
-# define YYLERR yysvec
-# define YYSTATE (yyestate-yysvec-1)
-# define YYOPTIM 1
-# define YYLMAX BUFSIZ
-# define output(c) putc(c,yyout)
-# define input() (((yytchar=yysptr>yysbuf?U(*--yysptr):getc(yyin))==10?(yylineno++,yytchar):yytchar)==EOF?0:yytchar)
-# define unput(c) {yytchar= (c);if(yytchar=='\n')yylineno--;*yysptr++=yytchar;}
-# define yymore() (yymorfg=1)
-# define ECHO fprintf(yyout, "%s",yytext)
-# define REJECT { nstr = yyreject(); goto yyfussy;}
-int yyleng; extern char yytext[];
-int yymorfg;
-extern char *yysptr, yysbuf[];
-int yytchar;
-FILE *yyin = {stdin}, *yyout = {stdout};
-extern int yylineno;
-struct yysvf { 
-	struct yywork *yystoff;
-	struct yysvf *yyother;
-	int *yystops;};
-struct yysvf *yyestate;
-extern struct yysvf yysvec[], *yybgin;
-#include <stdlib.h>
-#include <string.h>
-
-#include "opcode.h"
-#include "hash.h"
-#include "inout.h"
-#include "table.h"
-#include "y_tab.h"
-
-#undef input
-#undef unput
-
-static Input input;
-static Unput unput;
-
-void lua_setinput (Input fn)
-{
- input = fn;
-}
-
-void lua_setunput (Unput fn)
-{
- unput = fn;
-}
-
-char *lua_lasttext (void)
-{
- return yytext;
-}
-
-# define YYNEWLINE 10
-yylex(){
-int nstr; extern int yyprevious;
-while((nstr = yylook()) >= 0)
-yyfussy: switch(nstr){
-case 0:
-if(yywrap()) return(0); break;
-case 1:
-				;
-break;
-case 2:
-			{yylval.vInt = 1; return DEBUG;}
-break;
-case 3:
-			{yylval.vInt = 0; return DEBUG;}
-break;
-case 4:
-				lua_linenumber++;
-break;
-case 5:
-				;
-break;
-case 6:
-				return LOCAL;
-break;
-case 7:
-				return IF;
-break;
-case 8:
-				return THEN;
-break;
-case 9:
-				return ELSE;
-break;
-case 10:
-			return ELSEIF;
-break;
-case 11:
-				return WHILE;
-break;
-case 12:
-				return DO;
-break;
-case 13:
-			return REPEAT;
-break;
-case 14:
-				return UNTIL;
-break;
-case 15:
-			{
-                                         yylval.vWord = lua_nfile-1;
-                                         return FUNCTION;
-					}
-break;
-case 16:
-				return END;
-break;
-case 17:
-				return RETURN;
-break;
-case 18:
-				return LOCAL;
-break;
-case 19:
-				return NIL;
-break;
-case 20:
-				return AND;
-break;
-case 21:
-				return OR;
-break;
-case 22:
-				return NOT;
-break;
-case 23:
-				return NE;
-break;
-case 24:
-				return LE;
-break;
-case 25:
-				return GE;
-break;
-case 26:
-				return CONC;
-break;
-case 27:
-			case 28:
-		      {
-				       yylval.vWord = lua_findenclosedconstant (yytext);
-				       return STRING;
-				      }
-break;
-case 29:
-case 30:
-case 31:
-case 32:
-{
-				        yylval.vFloat = atof(yytext);
-				        return NUMBER;
-				       }
-break;
-case 33:
- 	       {
-					yylval.vWord = lua_findsymbol (yytext);
-					return NAME;
-				       }
-break;
-case 34:
-				return  *yytext;
-break;
-case -1:
-break;
-default:
-fprintf(yyout,"bad switch yylook %d",nstr);
-} return(0); }
-/* end of yylex */
-int yyvstop[] = {
-0,
-
-1,
-0,
-
-1,
-0,
-
-34,
-0,
-
-1,
-34,
-0,
-
-4,
-0,
-
-34,
-0,
-
-34,
-0,
-
-34,
-0,
-
-34,
-0,
-
-29,
-34,
-0,
-
-34,
-0,
-
-34,
-0,
-
-33,
-34,
-0,
-
-33,
-34,
-0,
-
-33,
-34,
-0,
-
-33,
-34,
-0,
-
-33,
-34,
-0,
-
-33,
-34,
-0,
-
-33,
-34,
-0,
-
-33,
-34,
-0,
-
-33,
-34,
-0,
-
-33,
-34,
-0,
-
-33,
-34,
-0,
-
-33,
-34,
-0,
-
-33,
-34,
-0,
-
-34,
-0,
-
-34,
-0,
-
-1,
-0,
-
-27,
-0,
-
-28,
-0,
-
-5,
-0,
-
-26,
-0,
-
-30,
-0,
-
-29,
-0,
-
-29,
-0,
-
-24,
-0,
-
-25,
-0,
-
-33,
-0,
-
-33,
-0,
-
-12,
-33,
-0,
-
-33,
-0,
-
-33,
-0,
-
-33,
-0,
-
-7,
-33,
-0,
-
-33,
-0,
-
-33,
-0,
-
-33,
-0,
-
-21,
-33,
-0,
-
-33,
-0,
-
-33,
-0,
-
-33,
-0,
-
-33,
-0,
-
-23,
-0,
-
-29,
-30,
-0,
-
-31,
-0,
-
-20,
-33,
-0,
-
-33,
-0,
-
-16,
-33,
-0,
-
-33,
-0,
-
-33,
-0,
-
-19,
-33,
-0,
-
-22,
-33,
-0,
-
-33,
-0,
-
-33,
-0,
-
-33,
-0,
-
-33,
-0,
-
-33,
-0,
-
-32,
-0,
-
-9,
-33,
-0,
-
-33,
-0,
-
-33,
-0,
-
-33,
-0,
-
-33,
-0,
-
-8,
-33,
-0,
-
-33,
-0,
-
-33,
-0,
-
-31,
-32,
-0,
-
-33,
-0,
-
-33,
-0,
-
-6,
-18,
-33,
-0,
-
-33,
-0,
-
-33,
-0,
-
-14,
-33,
-0,
-
-11,
-33,
-0,
-
-10,
-33,
-0,
-
-33,
-0,
-
-13,
-33,
-0,
-
-17,
-33,
-0,
-
-2,
-0,
-
-33,
-0,
-
-15,
-33,
-0,
-
-3,
-0,
-0};
-# define YYTYPE char
-struct yywork { YYTYPE verify, advance; } yycrank[] = {
-0,0,	0,0,	1,3,	0,0,	
-0,0,	0,0,	0,0,	0,0,	
-0,0,	0,0,	1,4,	1,5,	
-6,29,	4,28,	0,0,	0,0,	
-0,0,	0,0,	7,31,	0,0,	
-6,29,	6,29,	0,0,	0,0,	
-0,0,	0,0,	7,31,	7,31,	
-0,0,	0,0,	0,0,	0,0,	
-0,0,	0,0,	0,0,	1,6,	
-4,28,	0,0,	0,0,	0,0,	
-1,7,	0,0,	0,0,	0,0,	
-1,3,	6,30,	1,8,	1,9,	
-0,0,	1,10,	6,29,	7,31,	
-8,33,	0,0,	6,29,	0,0,	
-7,32,	0,0,	0,0,	6,29,	
-7,31,	1,11,	0,0,	1,12,	
-2,27,	7,31,	1,13,	11,39,	
-12,40,	1,13,	26,56,	0,0,	
-0,0,	2,8,	2,9,	0,0,	
-6,29,	0,0,	0,0,	6,29,	
-0,0,	0,0,	7,31,	0,0,	
-0,0,	7,31,	0,0,	0,0,	
-2,11,	0,0,	2,12,	0,0,	
-0,0,	0,0,	0,0,	0,0,	
-0,0,	0,0,	1,14,	0,0,	
-0,0,	1,15,	1,16,	1,17,	
-0,0,	22,52,	1,18,	18,47,	
-23,53,	1,19,	42,63,	1,20,	
-1,21,	25,55,	14,42,	1,22,	
-15,43,	1,23,	1,24,	16,44,	
-1,25,	16,45,	17,46,	19,48,	
-21,51,	2,14,	20,49,	1,26,	
-2,15,	2,16,	2,17,	24,54,	
-20,50,	2,18,	44,64,	45,65,	
-2,19,	46,66,	2,20,	2,21,	
-27,57,	48,67,	2,22,	49,68,	
-2,23,	2,24,	50,69,	2,25,	
-52,70,	53,72,	27,58,	54,73,	
-52,71,	9,34,	2,26,	9,35,	
-9,35,	9,35,	9,35,	9,35,	
-9,35,	9,35,	9,35,	9,35,	
-9,35,	10,36,	55,74,	10,37,	
-10,37,	10,37,	10,37,	10,37,	
-10,37,	10,37,	10,37,	10,37,	
-10,37,	57,75,	58,76,	64,80,	
-66,81,	67,82,	70,83,	71,84,	
-72,85,	73,86,	74,87,	10,38,	
-10,38,	38,61,	10,38,	38,61,	
-75,88,	76,89,	38,62,	38,62,	
-38,62,	38,62,	38,62,	38,62,	
-38,62,	38,62,	38,62,	38,62,	
-80,92,	81,93,	13,41,	13,41,	
-13,41,	13,41,	13,41,	13,41,	
-13,41,	13,41,	13,41,	13,41,	
-82,94,	83,95,	84,96,	10,38,	
-10,38,	86,97,	10,38,	13,41,	
-13,41,	13,41,	13,41,	13,41,	
-13,41,	13,41,	13,41,	13,41,	
-13,41,	13,41,	13,41,	13,41,	
-13,41,	13,41,	13,41,	13,41,	
-13,41,	13,41,	13,41,	13,41,	
-13,41,	13,41,	13,41,	13,41,	
-13,41,	87,98,	88,99,	60,79,	
-60,79,	13,41,	60,79,	13,41,	
-13,41,	13,41,	13,41,	13,41,	
-13,41,	13,41,	13,41,	13,41,	
-13,41,	13,41,	13,41,	13,41,	
-13,41,	13,41,	13,41,	13,41,	
-13,41,	13,41,	13,41,	13,41,	
-13,41,	13,41,	13,41,	13,41,	
-13,41,	33,33,	89,100,	60,79,	
-60,79,	92,101,	60,79,	93,102,	
-95,103,	33,33,	33,0,	96,104,	
-99,105,	100,106,	102,107,	106,108,	
-107,109,	35,35,	35,35,	35,35,	
-35,35,	35,35,	35,35,	35,35,	
-35,35,	35,35,	35,35,	108,110,	
-0,0,	0,0,	0,0,	0,0,	
-0,0,	0,0,	33,33,	0,0,	
-0,0,	35,59,	35,59,	33,33,	
-35,59,	0,0,	0,0,	33,33,	
-0,0,	0,0,	0,0,	0,0,	
-33,33,	0,0,	0,0,	0,0,	
-0,0,	36,60,	36,60,	36,60,	
-36,60,	36,60,	36,60,	36,60,	
-36,60,	36,60,	36,60,	0,0,	
-0,0,	33,33,	0,0,	0,0,	
-33,33,	35,59,	35,59,	0,0,	
-35,59,	36,38,	36,38,	59,77,	
-36,38,	59,77,	0,0,	0,0,	
-59,78,	59,78,	59,78,	59,78,	
-59,78,	59,78,	59,78,	59,78,	
-59,78,	59,78,	61,62,	61,62,	
-61,62,	61,62,	61,62,	61,62,	
-61,62,	61,62,	61,62,	61,62,	
-0,0,	0,0,	0,0,	0,0,	
-0,0,	36,38,	36,38,	0,0,	
-36,38,	77,78,	77,78,	77,78,	
-77,78,	77,78,	77,78,	77,78,	
-77,78,	77,78,	77,78,	79,90,	
-0,0,	79,90,	0,0,	0,0,	
-79,91,	79,91,	79,91,	79,91,	
-79,91,	79,91,	79,91,	79,91,	
-79,91,	79,91,	90,91,	90,91,	
-90,91,	90,91,	90,91,	90,91,	
-90,91,	90,91,	90,91,	90,91,	
-0,0};
-struct yysvf yysvec[] = {
-0,	0,	0,
-yycrank+-1,	0,		yyvstop+1,
-yycrank+-28,	yysvec+1,	yyvstop+3,
-yycrank+0,	0,		yyvstop+5,
-yycrank+4,	0,		yyvstop+7,
-yycrank+0,	0,		yyvstop+10,
-yycrank+-11,	0,		yyvstop+12,
-yycrank+-17,	0,		yyvstop+14,
-yycrank+7,	0,		yyvstop+16,
-yycrank+107,	0,		yyvstop+18,
-yycrank+119,	0,		yyvstop+20,
-yycrank+6,	0,		yyvstop+23,
-yycrank+7,	0,		yyvstop+25,
-yycrank+158,	0,		yyvstop+27,
-yycrank+4,	yysvec+13,	yyvstop+30,
-yycrank+5,	yysvec+13,	yyvstop+33,
-yycrank+11,	yysvec+13,	yyvstop+36,
-yycrank+5,	yysvec+13,	yyvstop+39,
-yycrank+5,	yysvec+13,	yyvstop+42,
-yycrank+12,	yysvec+13,	yyvstop+45,
-yycrank+21,	yysvec+13,	yyvstop+48,
-yycrank+10,	yysvec+13,	yyvstop+51,
-yycrank+4,	yysvec+13,	yyvstop+54,
-yycrank+4,	yysvec+13,	yyvstop+57,
-yycrank+21,	yysvec+13,	yyvstop+60,
-yycrank+9,	yysvec+13,	yyvstop+63,
-yycrank+9,	0,		yyvstop+66,
-yycrank+40,	0,		yyvstop+68,
-yycrank+0,	yysvec+4,	yyvstop+70,
-yycrank+0,	yysvec+6,	0,	
-yycrank+0,	0,		yyvstop+72,
-yycrank+0,	yysvec+7,	0,	
-yycrank+0,	0,		yyvstop+74,
-yycrank+-280,	0,		yyvstop+76,
-yycrank+0,	0,		yyvstop+78,
-yycrank+249,	0,		yyvstop+80,
-yycrank+285,	0,		yyvstop+82,
-yycrank+0,	yysvec+10,	yyvstop+84,
-yycrank+146,	0,		0,	
-yycrank+0,	0,		yyvstop+86,
-yycrank+0,	0,		yyvstop+88,
-yycrank+0,	yysvec+13,	yyvstop+90,
-yycrank+10,	yysvec+13,	yyvstop+92,
-yycrank+0,	yysvec+13,	yyvstop+94,
-yycrank+19,	yysvec+13,	yyvstop+97,
-yycrank+35,	yysvec+13,	yyvstop+99,
-yycrank+27,	yysvec+13,	yyvstop+101,
-yycrank+0,	yysvec+13,	yyvstop+103,
-yycrank+42,	yysvec+13,	yyvstop+106,
-yycrank+35,	yysvec+13,	yyvstop+108,
-yycrank+30,	yysvec+13,	yyvstop+110,
-yycrank+0,	yysvec+13,	yyvstop+112,
-yycrank+36,	yysvec+13,	yyvstop+115,
-yycrank+48,	yysvec+13,	yyvstop+117,
-yycrank+35,	yysvec+13,	yyvstop+119,
-yycrank+61,	yysvec+13,	yyvstop+121,
-yycrank+0,	0,		yyvstop+123,
-yycrank+76,	0,		0,	
-yycrank+67,	0,		0,	
-yycrank+312,	0,		0,	
-yycrank+183,	yysvec+36,	yyvstop+125,
-yycrank+322,	0,		0,	
-yycrank+0,	yysvec+61,	yyvstop+128,
-yycrank+0,	yysvec+13,	yyvstop+130,
-yycrank+78,	yysvec+13,	yyvstop+133,
-yycrank+0,	yysvec+13,	yyvstop+135,
-yycrank+81,	yysvec+13,	yyvstop+138,
-yycrank+84,	yysvec+13,	yyvstop+140,
-yycrank+0,	yysvec+13,	yyvstop+142,
-yycrank+0,	yysvec+13,	yyvstop+145,
-yycrank+81,	yysvec+13,	yyvstop+148,
-yycrank+66,	yysvec+13,	yyvstop+150,
-yycrank+74,	yysvec+13,	yyvstop+152,
-yycrank+80,	yysvec+13,	yyvstop+154,
-yycrank+78,	yysvec+13,	yyvstop+156,
-yycrank+94,	0,		0,	
-yycrank+93,	0,		0,	
-yycrank+341,	0,		0,	
-yycrank+0,	yysvec+77,	yyvstop+158,
-yycrank+356,	0,		0,	
-yycrank+99,	yysvec+13,	yyvstop+160,
-yycrank+89,	yysvec+13,	yyvstop+163,
-yycrank+108,	yysvec+13,	yyvstop+165,
-yycrank+120,	yysvec+13,	yyvstop+167,
-yycrank+104,	yysvec+13,	yyvstop+169,
-yycrank+0,	yysvec+13,	yyvstop+171,
-yycrank+113,	yysvec+13,	yyvstop+174,
-yycrank+148,	yysvec+13,	yyvstop+176,
-yycrank+133,	0,		0,	
-yycrank+181,	0,		0,	
-yycrank+366,	0,		0,	
-yycrank+0,	yysvec+90,	yyvstop+178,
-yycrank+183,	yysvec+13,	yyvstop+181,
-yycrank+182,	yysvec+13,	yyvstop+183,
-yycrank+0,	yysvec+13,	yyvstop+185,
-yycrank+172,	yysvec+13,	yyvstop+189,
-yycrank+181,	yysvec+13,	yyvstop+191,
-yycrank+0,	yysvec+13,	yyvstop+193,
-yycrank+0,	yysvec+13,	yyvstop+196,
-yycrank+189,	0,		0,	
-yycrank+195,	0,		0,	
-yycrank+0,	yysvec+13,	yyvstop+199,
-yycrank+183,	yysvec+13,	yyvstop+202,
-yycrank+0,	yysvec+13,	yyvstop+204,
-yycrank+0,	yysvec+13,	yyvstop+207,
-yycrank+0,	0,		yyvstop+210,
-yycrank+178,	0,		0,	
-yycrank+186,	yysvec+13,	yyvstop+212,
-yycrank+204,	0,		0,	
-yycrank+0,	yysvec+13,	yyvstop+214,
-yycrank+0,	0,		yyvstop+217,
-0,	0,	0};
-struct yywork *yytop = yycrank+423;
-struct yysvf *yybgin = yysvec+1;
-char yymatch[] = {
-00  ,01  ,01  ,01  ,01  ,01  ,01  ,01  ,
-01  ,011 ,012 ,01  ,01  ,01  ,01  ,01  ,
-01  ,01  ,01  ,01  ,01  ,01  ,01  ,01  ,
-01  ,01  ,01  ,01  ,01  ,01  ,01  ,01  ,
-011 ,01  ,'"' ,01  ,01  ,01  ,01  ,047 ,
-01  ,01  ,01  ,'+' ,01  ,'+' ,01  ,01  ,
-'0' ,'0' ,'0' ,'0' ,'0' ,'0' ,'0' ,'0' ,
-'0' ,'0' ,01  ,01  ,01  ,01  ,01  ,01  ,
-01  ,'A' ,'A' ,'A' ,'D' ,'D' ,'A' ,'D' ,
-'A' ,'A' ,'A' ,'A' ,'A' ,'A' ,'A' ,'A' ,
-'A' ,'A' ,'A' ,'A' ,'A' ,'A' ,'A' ,'A' ,
-'A' ,'A' ,'A' ,01  ,01  ,01  ,01  ,'A' ,
-01  ,'A' ,'A' ,'A' ,'D' ,'D' ,'A' ,'D' ,
-'A' ,'A' ,'A' ,'A' ,'A' ,'A' ,'A' ,'A' ,
-'A' ,'A' ,'A' ,'A' ,'A' ,'A' ,'A' ,'A' ,
-'A' ,'A' ,'A' ,01  ,01  ,01  ,01  ,01  ,
-0};
-char yyextra[] = {
-0,0,0,0,0,0,0,0,
-0,0,0,0,0,0,0,0,
-0,0,0,0,0,0,0,0,
-0,0,0,0,0,0,0,0,
-0,0,0,0,0,0,0,0,
-0};
-#ifndef lint
-static	char ncform_sccsid[] = "@(#)ncform 1.6 88/02/08 SMI"; /* from S5R2 1.2 */
-#endif
-
-int yylineno =1;
-# define YYU(x) x
-# define NLSTATE yyprevious=YYNEWLINE
-char yytext[YYLMAX];
-struct yysvf *yylstate [YYLMAX], **yylsp, **yyolsp;
-char yysbuf[YYLMAX];
-char *yysptr = yysbuf;
-int *yyfnd;
-extern struct yysvf *yyestate;
-int yyprevious = YYNEWLINE;
-yylook(){
-	register struct yysvf *yystate, **lsp;
-	register struct yywork *yyt;
-	struct yysvf *yyz;
-	int yych, yyfirst;
-	struct yywork *yyr;
-# ifdef LEXDEBUG
-	int debug;
-# endif
-	char *yylastch;
-	/* start off machines */
-# ifdef LEXDEBUG
-	debug = 0;
-# endif
-	yyfirst=1;
-	if (!yymorfg)
-		yylastch = yytext;
-	else {
-		yymorfg=0;
-		yylastch = yytext+yyleng;
-		}
-	for(;;){
-		lsp = yylstate;
-		yyestate = yystate = yybgin;
-		if (yyprevious==YYNEWLINE) yystate++;
-		for (;;){
-# ifdef LEXDEBUG
-			if(debug)fprintf(yyout,"state %d\n",yystate-yysvec-1);
-# endif
-			yyt = yystate->yystoff;
-			if(yyt == yycrank && !yyfirst){  /* may not be any transitions */
-				yyz = yystate->yyother;
-				if(yyz == 0)break;
-				if(yyz->yystoff == yycrank)break;
-				}
-			*yylastch++ = yych = input();
-			yyfirst=0;
-		tryagain:
-# ifdef LEXDEBUG
-			if(debug){
-				fprintf(yyout,"char ");
-				allprint(yych);
-				putchar('\n');
-				}
-# endif
-			yyr = yyt;
-			if ( (int)yyt > (int)yycrank){
-				yyt = yyr + yych;
-				if (yyt <= yytop && yyt->verify+yysvec == yystate){
-					if(yyt->advance+yysvec == YYLERR)	/* error transitions */
-						{unput(*--yylastch);break;}
-					*lsp++ = yystate = yyt->advance+yysvec;
-					goto contin;
-					}
-				}
-# ifdef YYOPTIM
-			else if((int)yyt < (int)yycrank) {		/* r < yycrank */
-				yyt = yyr = yycrank+(yycrank-yyt);
-# ifdef LEXDEBUG
-				if(debug)fprintf(yyout,"compressed state\n");
-# endif
-				yyt = yyt + yych;
-				if(yyt <= yytop && yyt->verify+yysvec == yystate){
-					if(yyt->advance+yysvec == YYLERR)	/* error transitions */
-						{unput(*--yylastch);break;}
-					*lsp++ = yystate = yyt->advance+yysvec;
-					goto contin;
-					}
-				yyt = yyr + YYU(yymatch[yych]);
-# ifdef LEXDEBUG
-				if(debug){
-					fprintf(yyout,"try fall back character ");
-					allprint(YYU(yymatch[yych]));
-					putchar('\n');
-					}
-# endif
-				if(yyt <= yytop && yyt->verify+yysvec == yystate){
-					if(yyt->advance+yysvec == YYLERR)	/* error transition */
-						{unput(*--yylastch);break;}
-					*lsp++ = yystate = yyt->advance+yysvec;
-					goto contin;
-					}
-				}
-			if ((yystate = yystate->yyother) && (yyt= yystate->yystoff) != yycrank){
-# ifdef LEXDEBUG
-				if(debug)fprintf(yyout,"fall back to state %d\n",yystate-yysvec-1);
-# endif
-				goto tryagain;
-				}
-# endif
-			else
-				{unput(*--yylastch);break;}
-		contin:
-# ifdef LEXDEBUG
-			if(debug){
-				fprintf(yyout,"state %d char ",yystate-yysvec-1);
-				allprint(yych);
-				putchar('\n');
-				}
-# endif
-			;
-			}
-# ifdef LEXDEBUG
-		if(debug){
-			fprintf(yyout,"stopped at %d with ",*(lsp-1)-yysvec-1);
-			allprint(yych);
-			putchar('\n');
-			}
-# endif
-		while (lsp-- > yylstate){
-			*yylastch-- = 0;
-			if (*lsp != 0 && (yyfnd= (*lsp)->yystops) && *yyfnd > 0){
-				yyolsp = lsp;
-				if(yyextra[*yyfnd]){		/* must backup */
-					while(yyback((*lsp)->yystops,-*yyfnd) != 1 && lsp > yylstate){
-						lsp--;
-						unput(*yylastch--);
-						}
-					}
-				yyprevious = YYU(*yylastch);
-				yylsp = lsp;
-				yyleng = yylastch-yytext+1;
-				yytext[yyleng] = 0;
-# ifdef LEXDEBUG
-				if(debug){
-					fprintf(yyout,"\nmatch ");
-					sprint(yytext);
-					fprintf(yyout," action %d\n",*yyfnd);
-					}
-# endif
-				return(*yyfnd++);
-				}
-			unput(*yylastch);
-			}
-		if (yytext[0] == 0  /* && feof(yyin) */)
-			{
-			yysptr=yysbuf;
-			return(0);
-			}
-		yyprevious = yytext[0] = input();
-		if (yyprevious>0)
-			output(yyprevious);
-		yylastch=yytext;
-# ifdef LEXDEBUG
-		if(debug)putchar('\n');
-# endif
-		}
-	}
-yyback(p, m)
-	int *p;
-{
-if (p==0) return(0);
-while (*p)
-	{
-	if (*p++ == m)
-		return(1);
-	}
-return(0);
-}
-	/* the following are only used in the lex library */
-yyinput(){
-	return(input());
-	}
-yyoutput(c)
-  int c; {
-	output(c);
-	}
-yyunput(c)
-   int c; {
-	unput(c);
-	}

lua.c

@@ -1,54 +1,92 @@
 /*
 ** lua.c
 ** Linguagem para Usuarios de Aplicacao
-** TeCGraf - PUC-Rio
-** 28 Apr 93
 */
 
+char *rcs_lua="$Id: lua.c,v 1.6 1995/10/23 13:54:11 roberto Exp roberto $";
+
 #include <stdio.h>
+#include <string.h>
 
 #include "lua.h"
 #include "lualib.h"
 
+static int lua_argc;
+static char **lua_argv;
 
-void test (void)
+/*
+** although this function is POSIX, there is no standard header file that
+** defines it
+*/
+int isatty (int fd);
+
+/*
+%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)
 {
-  lua_pushobject(lua_getparam(1));
-  lua_call ("c", 1);
+ 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]);
+ }
 }
 
 
-static void callfunc (void)
+static void manual_input (void)
 {
- lua_Object obj = lua_getparam (1);
- if (lua_isstring(obj)) lua_call(lua_getstring(obj),0);
+  if (isatty(fileno(stdin)))
+  {
+   char buffer[250];
+   while (gets(buffer) != 0)
+     lua_dostring(buffer);
+  }
+  else
+    lua_dofile(NULL);  /* executes stdin as a file */
 }
 
-static void execstr (void)
-{
- lua_Object obj = lua_getparam (1);
- if (lua_isstring(obj)) lua_dostring(lua_getstring(obj));
-}
 
-void main (int argc, char *argv[])
+int main (int argc, char *argv[])
 {
  int i;
- if (argc < 2)
- {
-  puts ("usage: lua filename [functionnames]");
-  return;
- }
- lua_register ("callfunc", callfunc);
- lua_register ("execstr", execstr);
- lua_register ("test", test);
+ int result = 0;
  iolib_open ();
  strlib_open ();
  mathlib_open ();
- lua_dofile (argv[1]);
- for (i=2; i<argc; i++)
+
+ lua_register("argv", lua_getargv);
+
+ if (argc < 2)
+   manual_input();
+ else
  {
-  lua_call (argv[i],0);
+  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)
+    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]);
+  }
  }
+ return result;
 }
 
 

lua.h

@@ -2,53 +2,108 @@
 ** LUA - Linguagem para Usuarios de Aplicacao
 ** Grupo de Tecnologia em Computacao Grafica
 ** TeCGraf - PUC-Rio
-** 19 May 93
+** $Id: lua.h,v 3.22 1996/02/12 18:32:09 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_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
+
 typedef void (*lua_CFunction) (void);
-typedef struct Object *lua_Object;
+typedef unsigned int lua_Object;
 
-#define lua_register(n,f)	(lua_pushcfunction(f), lua_storeglobal(n))
+lua_Object     lua_setfallback		(char *name, lua_CFunction fallback);
 
-
-void           lua_errorfunction    	(void (*fn) (char *s));
 void           lua_error		(char *s);
 int            lua_dofile 		(char *filename);
 int            lua_dostring 		(char *string);
-int            lua_call 		(char *functionname, int nparam);
+int            lua_callfunction		(lua_Object function);
+int	       lua_call			(char *funcname);
+
+void	       lua_beginblock		(void);
+void	       lua_endblock		(void);
 
 lua_Object     lua_getparam 		(int number);
+#define	       lua_getresult(_)		lua_getparam(_)
+
 float          lua_getnumber 		(lua_Object object);
 char          *lua_getstring 		(lua_Object object);
-char 	      *lua_copystring 		(lua_Object object);
 lua_CFunction  lua_getcfunction 	(lua_Object object);
 void          *lua_getuserdata  	(lua_Object object);
-lua_Object     lua_getfield         	(lua_Object object, char *field);
-lua_Object     lua_getindexed         	(lua_Object object, float index);
+
+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_pushobject       	(lua_Object object);
+
 lua_Object     lua_getglobal 		(char *name);
+void           lua_storeglobal		(char *name);
 
-lua_Object     lua_pop 			(void);
+void           lua_storesubscript	(void);
+lua_Object     lua_getsubscript         (void);
 
-int 	       lua_pushnil 		(void);
-int            lua_pushnumber 		(float n);
-int            lua_pushstring 		(char *s);
-int            lua_pushcfunction	(lua_CFunction fn);
-int            lua_pushuserdata     	(void *u);
-int            lua_pushobject       	(lua_Object object);
+int            lua_type 		(lua_Object object);
 
-int            lua_storeglobal		(char *name);
-int            lua_storefield		(lua_Object object, char *field);
-int            lua_storeindexed		(lua_Object object, float index);
+int	       lua_lock			(void);
+lua_Object     lua_getlocked		(int ref);
+void	       lua_pushlocked		(int ref);
+void	       lua_unlock		(int ref);
 
-int            lua_isnil 		(lua_Object object);
-int            lua_isnumber 		(lua_Object object);
-int            lua_isstring 		(lua_Object object);
-int            lua_istable          	(lua_Object object);
-int            lua_iscfunction 		(lua_Object object);
-int            lua_isuserdata 		(lua_Object object);
+lua_Object     lua_createtable		(void);
+
+
+/* some useful macros */
+
+#define lua_lockobject(o)  (lua_pushobject(o), lua_lock())
+
+#define lua_register(n,f)	(lua_pushcfunction(f), lua_storeglobal(n))
+
+#define lua_pushuserdata(u)     lua_pushusertag(u, LUA_T_USERDATA)
+
+#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)
+
+
+/* for compatibility with old versions. Avoid using these macros */
+
+#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_copystring(o) (strdup(lua_getstring(o)))
 
 #endif

luadebug.h

@@ -0,0 +1,31 @@
+/*
+** 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 $
+*/
+
+
+#ifndef luadebug_h
+#define luadebug_h
+
+#include "lua.h"
+
+typedef lua_Object lua_Function;
+
+typedef void (*lua_LHFunction) (int line);
+typedef void (*lua_CHFunction) (lua_Function func, char *file, int line);
+
+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 int lua_debug;
+
+#endif

lualib.h

@@ -1,8 +1,8 @@
 /*
-** Libraries to use in LUA programs
+** Libraries to be used in LUA programs
 ** Grupo de Tecnologia em Computacao Grafica
 ** TeCGraf - PUC-Rio
-** 19 May 93
+** $Id: lualib.h,v 1.5 1996/01/22 17:38:57 roberto Exp roberto $
 */
 
 #ifndef lualib_h
@@ -12,4 +12,12 @@ 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);
+
 #endif
+

luamem.c

@@ -0,0 +1,58 @@
+/*
+** mem.c
+** TecCGraf - PUC-Rio
+*/
+
+char *rcs_mem = "$Id: mem.c,v 1.6 1996/01/22 14:15:13 roberto Exp roberto $";
+
+#include <stdlib.h>
+#include <string.h>
+#include <stdio.h>
+
+#include "mem.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);
+  }
+}
+
+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;
+}
+
+
+void *luaI_realloc (void *oldblock, unsigned long size)
+{
+  void *block = realloc(oldblock, (size_t)size);
+  if (block == NULL)
+    mem_error();
+  return block;
+}
+
+
+char *luaI_strdup (char *str)
+{
+  char *newstr = luaI_malloc(strlen(str)+1);
+  strcpy(newstr, str);
+  return newstr;
+}

luamem.h

@@ -0,0 +1,25 @@
+/*
+** mem.c
+** memory manager for lua
+** $Id: mem.h,v 1.1 1994/11/16 17:38:08 roberto Stab roberto $
+*/
+ 
+#ifndef mem_h
+#define mem_h
+
+#ifndef NULL
+#define NULL 0
+#endif
+
+void luaI_free (void *block);
+void *luaI_malloc (unsigned long size);
+void *luaI_realloc (void *oldblock, unsigned long size);
+
+char *luaI_strdup (char *str);
+
+#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)))
+
+#endif 
+

makefile

@@ -0,0 +1,86 @@
+# $Id: makefile,v 1.19 1996/02/07 18:14:38 roberto Exp roberto $
+
+#configuration
+
+# define (undefine) POPEN if your system (does not) support piped I/O
+CONFIG = -DPOPEN
+# Compilation parameters
+CC = gcc
+CFLAGS = $(CONFIG) -I/usr/5include -Wall -Wmissing-prototypes -Wshadow -ansi -O2
+
+#CC = acc
+#CFLAGS = -fast -I/usr/5include
+
+AR = ar
+ARFLAGS	= rvl
+
+# Aplication modules
+LUAOBJS = \
+	parser.o \
+	lex.o \
+	opcode.o \
+	hash.o \
+	table.o \
+	inout.o \
+	tree.o \
+	fallback.o \
+	mem.o \
+	func.o
+
+LIBOBJS = 	\
+	iolib.o \
+	mathlib.o \
+	strlib.o
+
+
+lua : lua.o lua.a lualib.a
+	$(CC) $(CFLAGS) -o $@ lua.o lua.a lualib.a -lm
+
+lua.a : parser.o $(LUAOBJS)
+	$(AR) $(ARFLAGS) $@  $?
+	ranlib lua.a
+
+lualib.a : $(LIBOBJS)
+	$(AR) $(ARFLAGS) $@  $?
+	ranlib $@
+
+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
+
+parser.c : y.tab.c
+	sed -e 's/yy/luaY_/g' y.tab.c > parser.c
+
+parser.h : y.tab.h
+	sed -e 's/yy/luaY_/g' y.tab.h > parser.h
+
+clear	:
+	rcsclean
+	rm -f *.o
+	rm -f parser.c parser.h y.tab.c y.tab.h
+	co lua.h lualib.h luadebug.h
+
+% : RCS/%,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 

mathlib.c

@@ -1,26 +1,25 @@
 /*
 ** mathlib.c
-** Mathematica library to LUA
-**
-** Waldemar Celes Filho
-** TeCGraf - PUC-Rio
-** 19 May 93
+** Mathematics library to LUA
 */
 
-#include <stdio.h>		/* NULL */
+char *rcs_mathlib="$Id: mathlib.c,v 1.13 1995/11/10 17:54:31 roberto Exp roberto $";
+
+#include <stdlib.h>
 #include <math.h>
 
+#include "lualib.h"
 #include "lua.h"
 
+#ifndef PI
+#define PI          3.14159265358979323846
+#endif
+#define TODEGREE(a) ((a)*180.0/PI)
+#define TORAD(a)    ((a)*PI/180.0)
+
 static void math_abs (void)
 {
- double d;
- lua_Object o = lua_getparam (1);
- if (o == NULL)
- { lua_error ("too few arguments to function `abs'"); return; }
- if (!lua_isnumber(o))
- { lua_error ("incorrect arguments to function `abs'"); return; }
- d = lua_getnumber(o);
+ double d = lua_check_number(1, "abs"); 
  if (d < 0) d = -d;
  lua_pushnumber (d);
 }
@@ -28,188 +27,173 @@ static void math_abs (void)
 
 static void math_sin (void)
 {
- double d;
- lua_Object o = lua_getparam (1);
- if (o == NULL)
- { lua_error ("too few arguments to function `sin'"); return; }
- if (!lua_isnumber(o))
- { lua_error ("incorrect arguments to function `sin'"); return; }
- d = lua_getnumber(o);
- lua_pushnumber (sin(d));
+ double d = lua_check_number(1, "sin");
+ lua_pushnumber (sin(TORAD(d)));
 }
 
 
 
 static void math_cos (void)
 {
- double d;
- lua_Object o = lua_getparam (1);
- if (o == NULL)
- { lua_error ("too few arguments to function `cos'"); return; }
- if (!lua_isnumber(o))
- { lua_error ("incorrect arguments to function `cos'"); return; }
- d = lua_getnumber(o);
- lua_pushnumber (cos(d));
+ double d = lua_check_number(1, "cos");
+ lua_pushnumber (cos(TORAD(d)));
 }
 
 
 
 static void math_tan (void)
 {
- double d;
- lua_Object o = lua_getparam (1);
- if (o == NULL)
- { lua_error ("too few arguments to function `tan'"); return; }
- if (!lua_isnumber(o))
- { lua_error ("incorrect arguments to function `tan'"); return; }
- d = lua_getnumber(o);
- lua_pushnumber (tan(d));
+ double d = lua_check_number(1, "tan");
+ lua_pushnumber (tan(TORAD(d)));
 }
 
 
 static void math_asin (void)
 {
- double d;
- lua_Object o = lua_getparam (1);
- if (o == NULL)
- { lua_error ("too few arguments to function `asin'"); return; }
- if (!lua_isnumber(o))
- { lua_error ("incorrect arguments to function `asin'"); return; }
- d = lua_getnumber(o);
- lua_pushnumber (asin(d));
+ double d = lua_check_number(1, "asin");
+ lua_pushnumber (TODEGREE(asin(d)));
 }
 
 
 static void math_acos (void)
 {
- double d;
- lua_Object o = lua_getparam (1);
- if (o == NULL)
- { lua_error ("too few arguments to function `acos'"); return; }
- if (!lua_isnumber(o))
- { lua_error ("incorrect arguments to function `acos'"); return; }
- d = lua_getnumber(o);
- lua_pushnumber (acos(d));
+ double d = lua_check_number(1, "acos");
+ lua_pushnumber (TODEGREE(acos(d)));
 }
 
 
-
 static void math_atan (void)
 {
- double d;
- lua_Object o = lua_getparam (1);
- if (o == NULL)
- { lua_error ("too few arguments to function `atan'"); return; }
- if (!lua_isnumber(o))
- { lua_error ("incorrect arguments to function `atan'"); return; }
- d = lua_getnumber(o);
- lua_pushnumber (atan(d));
+ double d = lua_check_number(1, "atan");
+ lua_pushnumber (TODEGREE(atan(d)));
+}
+
+
+static void math_atan2 (void)
+{
+ double d1 = lua_check_number(1, "atan2");
+ double d2 = lua_check_number(2, "atan2");
+ lua_pushnumber (TODEGREE(atan2(d1, d2)));
 }
 
 
 static void math_ceil (void)
 {
- double d;
- lua_Object o = lua_getparam (1);
- if (o == NULL)
- { lua_error ("too few arguments to function `ceil'"); return; }
- if (!lua_isnumber(o))
- { lua_error ("incorrect arguments to function `ceil'"); return; }
- d = lua_getnumber(o);
+ double d = lua_check_number(1, "ceil");
  lua_pushnumber (ceil(d));
 }
 
 
 static void math_floor (void)
 {
- double d;
- lua_Object o = lua_getparam (1);
- if (o == NULL)
- { lua_error ("too few arguments to function `floor'"); return; }
- if (!lua_isnumber(o))
- { lua_error ("incorrect arguments to function `floor'"); return; }
- d = lua_getnumber(o);
+ double d = lua_check_number(1, "floor");
  lua_pushnumber (floor(d));
 }
 
 static void math_mod (void)
 {
- int d1, d2;
- lua_Object o1 = lua_getparam (1);
- lua_Object o2 = lua_getparam (2);
- if (!lua_isnumber(o1) || !lua_isnumber(o2))
- { lua_error ("incorrect arguments to function `mod'"); return; }
- d1 = (int) lua_getnumber(o1);
- d2 = (int) lua_getnumber(o2);
+ int d1 = (int)lua_check_number(1, "mod");
+ int d2 = (int)lua_check_number(2, "mod");
  lua_pushnumber (d1%d2);
 }
 
 
 static void math_sqrt (void)
 {
- double d;
- lua_Object o = lua_getparam (1);
- if (o == NULL)
- { lua_error ("too few arguments to function `sqrt'"); return; }
- if (!lua_isnumber(o))
- { lua_error ("incorrect arguments to function `sqrt'"); return; }
- d = lua_getnumber(o);
+ double d = lua_check_number(1, "sqrt");
  lua_pushnumber (sqrt(d));
 }
 
+static int old_pow;
+
 static void math_pow (void)
 {
- double d1, d2;
  lua_Object o1 = lua_getparam (1);
  lua_Object o2 = lua_getparam (2);
- if (!lua_isnumber(o1) || !lua_isnumber(o2))
- { lua_error ("incorrect arguments to function `pow'"); return; }
- d1 = lua_getnumber(o1);
- d2 = lua_getnumber(o2);
- lua_pushnumber (pow(d1,d2));
+ 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));
+ }
 }
 
 static void math_min (void)
 {
  int i=1;
- double d, dmin;
- lua_Object o;
- if ((o = lua_getparam(i++)) == NULL)
- { lua_error ("too few arguments to function `min'"); return; }
- if (!lua_isnumber(o))
- { lua_error ("incorrect arguments to function `min'"); return; }
- dmin = lua_getnumber (o);
- while ((o = lua_getparam(i++)) != NULL)
+ double dmin = lua_check_number(i, "min");
+ while (lua_getparam(++i) != LUA_NOOBJECT)
  {
-  if (!lua_isnumber(o))
-  { lua_error ("incorrect arguments to function `min'"); return; }
-  d = lua_getnumber (o);
+  double d = lua_check_number(i, "min");
   if (d < dmin) dmin = d;
  }
  lua_pushnumber (dmin);
 }
 
-
 static void math_max (void)
 {
  int i=1;
- double d, dmax;
- lua_Object o;
- if ((o = lua_getparam(i++)) == NULL)
- { lua_error ("too few arguments to function `max'"); return; }
- if (!lua_isnumber(o))
- { lua_error ("incorrect arguments to function `max'"); return; }
- dmax = lua_getnumber (o);
- while ((o = lua_getparam(i++)) != NULL)
+ double dmax = lua_check_number(i, "max");
+ while (lua_getparam(++i) != LUA_NOOBJECT)
  {
-  if (!lua_isnumber(o))
-  { lua_error ("incorrect arguments to function `max'"); return; }
-  d = lua_getnumber (o);
+  double d = lua_check_number(i, "max");
   if (d > dmax) dmax = d;
  }
  lua_pushnumber (dmax);
 }
 
+static void math_log (void)
+{
+ double d = lua_check_number(1, "log");
+ lua_pushnumber (log(d));
+}
+
+
+static void math_log10 (void)
+{
+ double d = lua_check_number(1, "log10");
+ lua_pushnumber (log10(d));
+}
+
+
+static void math_exp (void)
+{
+ double d = lua_check_number(1, "exp");
+ lua_pushnumber (exp(d));
+}
+
+static void math_deg (void)
+{
+ float d = lua_check_number(1, "deg");
+ lua_pushnumber (d*180./PI);
+}
+
+static void math_rad (void)
+{
+ float d = lua_check_number(1, "rad");
+ lua_pushnumber (d/180.*PI);
+}
+
+static void math_random (void)
+{
+  lua_pushnumber((double)(rand()%RAND_MAX) / (double)RAND_MAX);
+}
+
+static void math_randomseed (void)
+{
+  srand(lua_check_number(1, "randomseed"));
+}
+
 
 
 /*
@@ -224,11 +208,20 @@ void mathlib_open (void)
  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 ("pow",   math_pow);
  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));
 }

mathlib.h

@@ -0,0 +1,13 @@
+/*
+** Math library to LUA
+** TeCGraf - PUC-Rio
+** $Id: $
+*/
+
+
+#ifndef strlib_h
+
+void mathlib_open (void);
+
+#endif
+

opcode.h

@@ -1,56 +1,57 @@
 /*
-** opcode.h
 ** TeCGraf - PUC-Rio
-** 16 Apr 92
+** $Id: opcode.h,v 3.16 1996/01/26 18:03:19 roberto Exp roberto $
 */
 
 #ifndef opcode_h
 #define opcode_h
 
-#ifndef STACKGAP
-#define STACKGAP	128
-#endif 
+#include "lua.h"
+#include "types.h"
+#include "tree.h"
+#include "func.h"
 
-#ifndef real
-#define real float
-#endif
 
-typedef unsigned char  Byte;
+#define FIELDS_PER_FLUSH 40
 
-typedef unsigned short Word;
 
 typedef enum 
 { 
- NOP,
  PUSHNIL,
  PUSH0, PUSH1, PUSH2,
  PUSHBYTE,
  PUSHWORD,
  PUSHFLOAT,
  PUSHSTRING,
+ PUSHFUNCTION,
  PUSHLOCAL0, PUSHLOCAL1, PUSHLOCAL2, PUSHLOCAL3, PUSHLOCAL4,
  PUSHLOCAL5, PUSHLOCAL6, PUSHLOCAL7, PUSHLOCAL8, PUSHLOCAL9,
  PUSHLOCAL,
  PUSHGLOBAL,
  PUSHINDEXED,
- PUSHMARK,
- PUSHOBJECT,
+ PUSHSELF,
  STORELOCAL0, STORELOCAL1, STORELOCAL2, STORELOCAL3, STORELOCAL4,
  STORELOCAL5, STORELOCAL6, STORELOCAL7, STORELOCAL8, STORELOCAL9,
  STORELOCAL,
  STOREGLOBAL,
  STOREINDEXED0,
  STOREINDEXED,
- STOREFIELD,
+ STORELIST0,
+ STORELIST,
+ STORERECORD,
+ ADJUST0,
  ADJUST,
  CREATEARRAY,
  EQOP,
  LTOP,
  LEOP,
+ GTOP,
+ GEOP,
  ADDOP,
  SUBOP,
  MULTOP,
  DIVOP,
+ POWOP,
  CONCOP,
  MINUSOP,
  NOTOP,
@@ -62,83 +63,82 @@ typedef enum
  IFFUPJMP,
  POP,
  CALLFUNC,
+ RETCODE0,
  RETCODE,
- HALT,
- SETFUNCTION,
- SETLINE,
- RESET
+ SETLINE
 } OpCode;
 
-typedef enum
-{
- T_MARK,
- T_NIL,
- T_NUMBER,
- T_STRING,
- T_ARRAY,
- T_FUNCTION,
- T_CFUNCTION,
- T_USERDATA
-} Type; 
+#define MULT_RET	255
 
-typedef void (*Cfunction) (void);
-typedef int  (*Input) (void);
-typedef void (*Unput) (int );
 
 typedef union
 {
- Cfunction 	 f;
- real    	 n;
- char      	*s;
- Byte      	*b;
+ lua_CFunction f;
+ real          n;
+ TaggedString *ts;
+ TFunc         *tf;
  struct Hash    *a;
  void           *u;
+ int	       i;
 } Value;
 
 typedef struct Object
 {
- Type  tag;
+ lua_Type  tag;
  Value value;
 } Object;
 
-typedef struct
-{
- char   *name;
- Object  object;
-} Symbol;
 
 /* Macros to access structure members */
 #define tag(o)		((o)->tag)
 #define nvalue(o)	((o)->value.n)
-#define svalue(o)	((o)->value.s)
-#define bvalue(o)	((o)->value.b)
+#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_name(i)	(lua_table[i].name)
 #define s_object(i)	(lua_table[i].object)
 #define s_tag(i)	(tag(&s_object(i)))
 #define s_nvalue(i)	(nvalue(&s_object(i)))
 #define s_svalue(i)	(svalue(&s_object(i)))
-#define s_bvalue(i)	(bvalue(&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++;}
+
 
 /* Exported functions */
-int     lua_execute   (Byte *pc);
-void    lua_markstack (void);
 char   *lua_strdup (char *l);
 
-void    lua_setinput   (Input fn);	/* from "lua.lex" module */
-void    lua_setunput   (Unput fn);	/* from "lua.lex" module */
-char   *lua_lasttext   (void);		/* from "lua.lex" module */
-int     lua_parse      (void); 		/* from "lua.stx" module */
-void    lua_type       (void);
-void 	lua_obj2number (void);
-void 	lua_print      (void);
+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);
 
 #endif

strlib.c

@@ -1,36 +1,101 @@
 /*
 ** strlib.c
 ** String library to LUA
-**
-** Waldemar Celes Filho
-** TeCGraf - PUC-Rio
-** 19 May 93
 */
 
-#include <stdlib.h>
+char *rcs_strlib="$Id: strlib.c,v 1.18 1996/02/12 18:32:40 roberto Exp $";
+
 #include <string.h>
+#include <stdio.h>
+#include <stdlib.h>
 #include <ctype.h>
 
-
 #include "lua.h"
+#include "lualib.h"
+
+
+void lua_arg_error(char *funcname)
+{
+  char buff[100];
+  sprintf(buff, "incorrect arguments to function `%s'", funcname);
+  lua_error(buff);
+}
+
+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);
+}
+
+double lua_check_number (int numArg, char *funcname)
+{
+  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;
+  }
+  lua_arg_error(funcname);
+  return 0;  /* to avoid warnings */
+}
+
+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;
+}
+
 
 /*
 ** Return the position of the first caracter of a substring into a string
 ** LUA interface:
-**			n = strfind (string, substring)
+**			n = strfind (string, substring, init, end)
 */
 static void str_find (void)
 {
- int n;
- char *s1, *s2;
- lua_Object o1 = lua_getparam (1);
- lua_Object o2 = lua_getparam (2);
- if (!lua_isstring(o1) || !lua_isstring(o2))
- { lua_error ("incorrect arguments to function `strfind'"); return; }
- s1 = lua_getstring(o1);
- s2 = lua_getstring(o2);
- n = strstr(s1,s2) - s1 + 1;
- lua_pushnumber (n);
+ 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();
 }
 
 /*
@@ -40,10 +105,8 @@ static void str_find (void)
 */
 static void str_len (void)
 {
- lua_Object o = lua_getparam (1);
- if (!lua_isstring(o))
- { lua_error ("incorrect arguments to function `strlen'"); return; }
- lua_pushnumber(strlen(lua_getstring(o)));
+ char *s = lua_check_string(1, "strlen");
+ lua_pushnumber(strlen(s));
 }
 
 
@@ -54,24 +117,19 @@ static void str_len (void)
 */
 static void str_sub (void)
 {
- int start, end;
- char *s;
- lua_Object o1 = lua_getparam (1);
- lua_Object o2 = lua_getparam (2);
- lua_Object o3 = lua_getparam (3);
- if (!lua_isstring(o1) || !lua_isnumber(o2) || !lua_isnumber(o3))
- { lua_error ("incorrect arguments to function `strsub'"); return; }
- s = strdup (lua_getstring(o1));
- start = lua_getnumber (o2);
- end = lua_getnumber (o3);
+ 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_pushstring ("");
+  lua_pushliteral("");
  else
  {
-  s[end] = 0;
-  lua_pushstring (&s[start-1]);
+   luaI_addchar(0);
+   while (start <= end) 
+     luaI_addchar(s[start++ - 1]);
+   lua_pushstring (luaI_addchar(0));
  }
- free (s);
 }
 
 /*
@@ -81,19 +139,12 @@ static void str_sub (void)
 */
 static void str_lower (void)
 {
- char *s, *c;
- lua_Object o = lua_getparam (1);
- if (!lua_isstring(o))
- { lua_error ("incorrect arguments to function `strlower'"); return; }
- c = s = strdup(lua_getstring(o));
- while (*c != 0)
- {
-  *c = tolower(*c);
-  c++;
- }
- lua_pushstring(s);
- free(s);
-} 
+  char *s = lua_check_string(1, "strlower");
+  luaI_addchar(0);
+  while (*s)
+    luaI_addchar(tolower(*s++));
+  lua_pushstring(luaI_addchar(0));
+}
 
 
 /*
@@ -103,19 +154,91 @@ static void str_lower (void)
 */
 static void str_upper (void)
 {
- char *s, *c;
- lua_Object o = lua_getparam (1);
- if (!lua_isstring(o))
- { lua_error ("incorrect arguments to function `strlower'"); return; }
- c = s = strdup(lua_getstring(o));
- while (*c != 0)
- {
-  *c = toupper(*c);
-  c++;
- }
- lua_pushstring(s);
- free(s);
-} 
+  char *s = lua_check_string(1, "strupper");
+  luaI_addchar(0);
+  while (*s)
+    luaI_addchar(toupper(*s++));
+  lua_pushstring(luaI_addchar(0));
+}
+
+/*
+** get ascii value of a character in a string
+*/
+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]);
+}
+
+
+#define MAX_CONVERTION 2000
+#define MAX_FORMAT 50
+
+static void str_format (void)
+{
+  int arg = 1;
+  char *strfrmt = lua_check_string(arg++, "format");
+  luaI_addchar(0);  /* initialize */
+  while (*strfrmt)
+  {
+    if (*strfrmt != '%')
+      luaI_addchar(*strfrmt++);
+    else if (*++strfrmt == '%')
+      luaI_addchar(*strfrmt++);  /* %% */
+    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'");
+          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"));
+          break;
+        case 'e':  case 'E': case 'f': case 'g':
+          sprintf(buff, form, lua_check_number(arg++, "format"));
+          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]);
+    }
+  }
+  lua_pushstring(luaI_addchar(0));  /* push the result */
+}
 
 
 /*
@@ -128,4 +251,6 @@ void strlib_open (void)
  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);
 }

strlib.h

@@ -0,0 +1,13 @@
+/*
+** String library to LUA
+** TeCGraf - PUC-Rio
+** $Id: $
+*/
+
+
+#ifndef strlib_h
+
+void strlib_open (void);
+
+#endif
+

table.c

@@ -1,351 +1,276 @@
 /*
 ** table.c
 ** Module to control static tables
-** TeCGraf - PUC-Rio
-** 11 May 93
 */
 
-#include <stdlib.h>
-#include <string.h>
+char *rcs_table="$Id: table.c,v 2.46 1996/02/14 13:35:51 roberto Exp roberto $";
 
+#include "mem.h"
 #include "opcode.h"
+#include "tree.h"
 #include "hash.h"
-#include "inout.h"
 #include "table.h"
+#include "inout.h"
 #include "lua.h"
+#include "fallback.h"
+#include "luadebug.h"
 
-#define streq(s1,s2)	(strcmp(s1,s2)==0)
 
-#ifndef MAXSYMBOL
-#define MAXSYMBOL	512
-#endif
-static Symbol  		tablebuffer[MAXSYMBOL] = {
-                                    {"type",{T_CFUNCTION,{lua_type}}},
-                                    {"tonumber",{T_CFUNCTION,{lua_obj2number}}},
-                                    {"next",{T_CFUNCTION,{lua_next}}},
-                                    {"nextvar",{T_CFUNCTION,{lua_nextvar}}},
-                                    {"print",{T_CFUNCTION,{lua_print}}}
-                                                 };
-Symbol	       	       *lua_table=tablebuffer;
-Word   	 		lua_ntable=5;
+#define BUFFER_BLOCK 256
 
-#ifndef MAXCONSTANT
-#define MAXCONSTANT	256
-#endif
-static char  	       *constantbuffer[MAXCONSTANT] = {"mark","nil","number",
-                                                       "string","table",
-                                                       "function","cfunction"
-                                                      };
-char  	      	      **lua_constant = constantbuffer;
-Word    		lua_nconstant=T_CFUNCTION+1;
+Symbol *lua_table = NULL;
+static Word lua_ntable = 0;
+static Long lua_maxsymbol = 0;
 
-#ifndef MAXSTRING
-#define MAXSTRING	512
-#endif
-static char 	       *stringbuffer[MAXSTRING];
-char  		      **lua_string = stringbuffer;
-Word    		lua_nstring=0;
+TaggedString **lua_constant = NULL;
+static Word lua_nconstant = 0;
+static Long lua_maxconstant = 0;
 
-#ifndef MAXARRAY
-#define MAXARRAY	512
-#endif
-static Hash             *arraybuffer[MAXARRAY];
-Hash  	              **lua_array = arraybuffer;
-Word    		lua_narray=0;
 
-#define MAXFILE 	20
-char  		       *lua_file[MAXFILE];
-int      		lua_nfile;
+#define GARBAGE_BLOCK 1024
+#define MIN_GARBAGE_BLOCK (GARBAGE_BLOCK/2)
+
+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;
+  }
+}
+
+
+/*
+** Initialise constant table with pre-defined constants
+*/
+void luaI_initconstant (void)
+{
+ lua_maxconstant = BUFFER_BLOCK;
+ lua_constant = newvector(lua_maxconstant, TaggedString *);
+}
 
 
 /*
 ** Given a name, search it at symbol table and return its index. If not
-** found, allocate at end of table, checking oveflow and return its index.
-** On error, return -1.
+** found, allocate it.
 */
-int lua_findsymbol (char *s)
+Word luaI_findsymbol (TaggedString *t)
 {
- int i;
+ if (t->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_table[lua_ntable].varname = t;
+  s_tag(lua_ntable) = LUA_T_NIL;
+  lua_ntable++;
+  if (!t->marked)
+    t->marked = 2;  /* avoid GC */
+ }
+ return t->varindex;
+}
+
+
+Word luaI_findsymbolbyname (char *name)
+{
+  return luaI_findsymbol(lua_createstring(name));
+}
+
+
+/*
+** Given a tree node, check it is has a correspondent constant index. If not,
+** allocate it.
+*/
+Word luaI_findconstant (TaggedString *t)
+{
+ if (t->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_constant[lua_nconstant] = t;
+  lua_nconstant++;
+  if (!t->marked)
+    t->marked = 2;  /* avoid GC */
+ }
+ return t->constindex;
+}
+
+
+Word  luaI_findconstantbyname (char *name)
+{
+  return luaI_findconstant(lua_createstring(name));
+}
+
+TaggedString *lua_constcreate(char *name)
+{
+  int i = luaI_findconstantbyname(name);
+  return lua_constant[i];
+}
+
+
+/*
+** Traverse symbol table objects
+*/
+static char *lua_travsymbol (int (*fn)(Object *))
+{
+ Word i;
  for (i=0; i<lua_ntable; i++)
-  if (streq(s,s_name(i)))
-   return i;
- if (lua_ntable >= MAXSYMBOL-1)
- {
-  lua_error ("symbol table overflow");
-  return -1;
- }
- s_name(lua_ntable) = strdup(s);
- if (s_name(lua_ntable) == NULL)
- {
-  lua_error ("not enough memory");
-  return -1;
- }
- s_tag(lua_ntable++) = T_NIL;
- 
- return (lua_ntable-1);
-}
-
-/*
-** Given a constant string, eliminate its delimeters (" or '), search it at 
-** constant table and return its index. If not found, allocate at end of 
-** the table, checking oveflow and return its index.
-**
-** For each allocation, the function allocate a extra char to be used to
-** mark used string (it's necessary to deal with constant and string 
-** uniformily). The function store at the table the second position allocated,
-** that represents the beginning of the real string. On error, return -1.
-** 
-*/
-int lua_findenclosedconstant (char *s)
-{
- int i, j, l=strlen(s);
- char *c = calloc (l, sizeof(char)); 	/* make a copy */
- 
- c++;		/* create mark space */
-
- /* introduce scape characters */ 
- for (i=1,j=0; i<l-1; i++)
- {
-  if (s[i] == '\\')
-  {
-   switch (s[++i])
-   {
-    case 'n': c[j++] = '\n'; break;
-    case 't': c[j++] = '\t'; break;
-    case 'r': c[j++] = '\r'; break;
-    default : c[j++] = '\\'; c[j++] = c[i]; break;
-   }
-  }
-  else
-   c[j++] = s[i];
- }
- c[j++] = 0;
- 
- for (i=0; i<lua_nconstant; i++)
-  if (streq(c,lua_constant[i]))
-  {
-   free (c-1);
-   return i;
-  }
- if (lua_nconstant >= MAXCONSTANT-1)
- {
-  lua_error ("lua: constant string table overflow"); 
-  return -1;
- }
- lua_constant[lua_nconstant++] = c;
- return (lua_nconstant-1);
-}
-
-/*
-** Given a constant string, search it at constant table and return its index.
-** If not found, allocate at end of the table, checking oveflow and return 
-** its index.
-**
-** For each allocation, the function allocate a extra char to be used to
-** mark used string (it's necessary to deal with constant and string 
-** uniformily). The function store at the table the second position allocated,
-** that represents the beginning of the real string. On error, return -1.
-** 
-*/
-int lua_findconstant (char *s)
-{
- int i;
- for (i=0; i<lua_nconstant; i++)
-  if (streq(s,lua_constant[i]))
-   return i;
- if (lua_nconstant >= MAXCONSTANT-1)
- {
-  lua_error ("lua: constant string table overflow"); 
-  return -1;
- }
- {
-  char *c = calloc(strlen(s)+2,sizeof(char));
-  c++;		/* create mark space */
-  lua_constant[lua_nconstant++] = strcpy(c,s);
- }
- return (lua_nconstant-1);
+  if (fn(&s_object(i)))
+    return lua_table[i].varname->str;
+ return NULL;
 }
 
 
 /*
 ** Mark an object if it is a string or a unmarked array.
 */
-void lua_markobject (Object *o)
-{
- if (tag(o) == T_STRING)
-  lua_markstring (svalue(o)) = 1;
- else if (tag(o) == T_ARRAY && markarray(avalue(o)) == 0)
+int lua_markobject (Object *o)
+{/* if already marked, does not change mark value */
+ if (tag(o) == LUA_T_STRING && !tsvalue(o)->marked)
+   tsvalue(o)->marked = 1;
+ else if (tag(o) == LUA_T_ARRAY)
    lua_hashmark (avalue(o));
-}
-
-/*
-** Mark all strings and arrays used by any object stored at symbol table.
-*/
-static void lua_marktable (void)
-{
- int i;
- for (i=0; i<lua_ntable; i++)
-  lua_markobject (&s_object(i));
-} 
-
-/*
-** Simulate a garbage colection. When string table or array table overflows,
-** this function check if all allocated strings and arrays are in use. If
-** there are unused ones, pack (compress) the tables.
-*/
-static void lua_pack (void)
-{
- lua_markstack ();
- lua_marktable ();
- 
- { /* pack string */
-  int i, j;
-  for (i=j=0; i<lua_nstring; i++)
-   if (lua_markstring(lua_string[i]) == 1)
-   {
-    lua_string[j++] = lua_string[i];
-    lua_markstring(lua_string[i]) = 0;
-   }
-   else
-   {
-    free (lua_string[i]-1);
-   }
-  lua_nstring = j;
- }
-
- { /* pack array */
-  int i, j;
-  for (i=j=0; i<lua_narray; i++)
-   if (markarray(lua_array[i]) == 1)
-   {
-    lua_array[j++] = lua_array[i];
-    markarray(lua_array[i]) = 0;
-   }
-   else
-   {
-    lua_hashdelete (lua_array[i]);
-   }
-  lua_narray = j;
- }
-}
-
-/*
-** Allocate a new string at string table. The given string is already 
-** allocated with mark space and the function puts it at the end of the
-** table, checking overflow, and returns its own pointer, or NULL on error.
-*/
-char *lua_createstring (char *s)
-{
- if (s == NULL) return NULL;
- 
- if (lua_nstring >= MAXSTRING-1)
- {
-  lua_pack ();
-  if (lua_nstring >= MAXSTRING-1)
-  {
-   lua_error ("string table overflow");
-   return NULL;
-  }
- } 
- lua_string[lua_nstring++] = s;
- return s;
-}
-
-/*
-** Allocate a new array, already created, at array table. The function puts 
-** it at the end of the table, checking overflow, and returns its own pointer,
-** or NULL on error.
-*/
-void *lua_createarray (void *a)
-{
- if (a == NULL) return NULL;
- 
- if (lua_narray >= MAXARRAY-1)
- {
-  lua_pack ();
-  if (lua_narray >= MAXARRAY-1)
-  {
-   lua_error ("indexed table overflow");
-   return NULL;
-  }
- } 
- lua_array[lua_narray++] = a;
- return a;
-}
-
-
-/*
-** Add a file name at file table, checking overflow. This function also set
-** the external variable "lua_filename" with the function filename set.
-** Return 0 on success or 1 on error.
-*/
-int lua_addfile (char *fn)
-{
- if (lua_nfile >= MAXFILE-1)
- {
-  lua_error ("too many files");
-  return 1;
- }
- if ((lua_file[lua_nfile++] = strdup (fn)) == NULL)
- {
-  lua_error ("not enough memory");
-  return 1;
- }
+ else if ((o->tag == LUA_T_FUNCTION || o->tag == LUA_T_MARK)
+           && !o->value.tf->marked)
+   o->value.tf->marked = 1;
  return 0;
 }
 
+
 /*
-** Return the last file name set.
+** Garbage collection. 
+** Delete all unused strings and arrays.
 */
-char *lua_filename (void)
+Long luaI_collectgarbage (void)
 {
- return lua_file[lua_nfile-1];
-}
+  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();
+  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;
+} 
+
 
 /*
 ** Internal function: return next global variable
 */
-void lua_nextvar (void)
+static void lua_nextvar (void)
 {
- int index;
- Object *o = lua_getparam (1);
- if (o == NULL)
- { lua_error ("too few arguments to function `nextvar'"); return; }
- if (lua_getparam (2) != NULL)
- { lua_error ("too many arguments to function `nextvar'"); return; }
- if (tag(o) == T_NIL)
+ 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))
  {
-  index = 0;
+   lua_error("incorrect argument to function `nextvar'"); 
+   return;  /* to avoid warnings */
  }
- else if (tag(o) != T_STRING) 
- { 
-  lua_error ("incorrect argument to function `nextvar'"); 
-  return;
+ 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
  {
-  for (index=0; index<lua_ntable; index++)
-   if (streq(s_name(index),svalue(o))) break;
-  if (index == lua_ntable) 
-  {
-   lua_error ("name not found in function `nextvar'");
-   return;
-  }
-  index++;
-  while (index < lua_ntable-1 && tag(&s_object(index)) == T_NIL) index++;
-  
-  if (index == lua_ntable-1)
-  {
-   lua_pushnil();
-   lua_pushnil();
-   return;
-  }
- }
- {
+  TaggedString *t = lua_table[next].varname;
   Object name;
-  tag(&name) = T_STRING;
-  svalue(&name) = lua_createstring(lua_strdup(s_name(index)));
-  if (lua_pushobject (&name)) return;
-  if (lua_pushobject (&s_object(index))) return;
+  tag(&name) = LUA_T_STRING;
+  tsvalue(&name) = t;
+  luaI_pushobject(&name);
+  luaI_pushobject(&s_object(next));
  }
 }
+
+
+static Object *functofind;
+static int checkfunc (Object *o)
+{
+  if (o->tag == LUA_T_FUNCTION)
+    return
+       ((functofind->tag == LUA_T_FUNCTION || functofind->tag == LUA_T_MARK)
+            && (functofind->value.tf == o->value.tf));
+  if (o->tag == LUA_T_CFUNCTION)
+    return
+       ((functofind->tag == LUA_T_CFUNCTION || functofind->tag == LUA_T_CMARK)
+            && (functofind->value.f == o->value.f));
+  return 0;
+}
+
+
+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";
+  else if ((*name = lua_travsymbol(checkfunc)) != NULL)
+    return "global";
+  else return "";
+}
+

table.h

@@ -1,39 +1,35 @@
 /*
-** table.c
 ** Module to control static tables
 ** TeCGraf - PUC-Rio
-** 11 May 93
+** $Id: table.h,v 2.17 1996/02/12 18:32:40 roberto Exp roberto $
 */
 
 #ifndef table_h
 #define table_h
 
+#include "tree.h"
+#include "opcode.h"
+
+typedef struct
+{
+ Object  object;
+ TaggedString *varname;
+} Symbol;
+
+
 extern Symbol *lua_table;
-extern Word    lua_ntable;
+extern TaggedString **lua_constant;
 
-extern char  **lua_constant;
-extern Word    lua_nconstant;
+void luaI_initsymbol (void);
+void  luaI_initconstant (void);
+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);
+void  lua_pack            (void);
 
-extern char  **lua_string;
-extern Word    lua_nstring;
-
-extern Hash  **lua_array;
-extern Word    lua_narray;
-
-extern char   *lua_file[];
-extern int     lua_nfile;
-
-#define lua_markstring(s)	(*((s)-1))
-
-
-int   lua_findsymbol           (char *s);
-int   lua_findenclosedconstant (char *s);
-int   lua_findconstant         (char *s);
-void  lua_markobject           (Object *o);
-char *lua_createstring         (char *s);
-void *lua_createarray          (void *a);
-int   lua_addfile              (char *fn);
-char *lua_filename             (void);
-void  lua_nextvar              (void);
 
 #endif

tree.c

@@ -0,0 +1,146 @@
+/*
+** tree.c
+** TecCGraf - PUC-Rio
+*/
+ 
+char *rcs_tree="$Id: tree.c,v 1.17 1996/02/14 13:35:51 roberto Exp roberto $";
+
+
+#include <string.h>
+
+#include "mem.h"
+#include "lua.h"
+#include "tree.h"
+#include "lex.h"
+#include "hash.h"
+#include "table.h"
+
+
+#define NUM_HASHS  64
+
+typedef struct {
+  int size;
+  int nuse;  /* number of elements (including EMPTYs) */
+  TaggedString **hash;
+} stringtable;
+
+static int initialized = 0;
+
+static stringtable string_root[NUM_HASHS];
+
+static TaggedString EMPTY = {NOT_USED, NOT_USED, 0, 2, {0}};
+
+
+static unsigned long hash (char *str)
+{
+  unsigned long h = 0;
+  while (*str)
+    h = ((h<<5)-h)^(unsigned char)*(str++);
+  return h;
+}
+
+static void initialize (void)
+{
+  initialized = 1;
+  luaI_addReserved();
+  luaI_initsymbol();
+  luaI_initconstant();
+}
+
+
+static void grow (stringtable *tb)
+{
+  int newsize = luaI_redimension(tb->size);
+  TaggedString **newhash = newvector(newsize, TaggedString *);
+  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); 
+  }
+  tb->size = newsize;
+  tb->hash = newhash;
+}
+
+static TaggedString *insert (char *str, stringtable *tb)
+{
+  TaggedString *ts;
+  unsigned long h = hash(str);
+  int i;
+  int j = -1;
+  if ((Long)tb->nuse*3 >= (Long)tb->size*2)
+  {
+    if (!initialized)
+      initialize();
+    grow(tb);
+  }
+  i = h%tb->size;
+  while (tb->hash[i])
+  {
+    if (tb->hash[i] == &EMPTY)
+      j = i;
+    else if (strcmp(str, tb->hash[i]->str) == 0)
+      return tb->hash[i];
+    i = (i+1)%tb->size;
+  }
+  /* not found */
+  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;
+  return ts;
+}
+
+TaggedString *lua_createstring (char *str) 
+{
+  return insert(str, &string_root[(unsigned)str[0]%NUM_HASHS]);
+}
+
+
+/*
+** Garbage collection function.
+** This function traverse the string list freeing unindexed strings
+*/
+Long lua_strcollector (void)
+{
+  Long counter = 0;
+  int i;
+  for (i=0; i<NUM_HASHS; i++)
+  {
+    stringtable *tb = &string_root[i];
+    int j;
+    for (j=0; j<tb->size; j++)
+    {
+      TaggedString *t = tb->hash[j];
+      if (t != NULL && t->marked <= 1)
+      {
+        if (t->marked)
+          t->marked = 0;
+        else
+        {
+          luaI_free(t);
+          tb->hash[j] = &EMPTY;
+          counter++;
+        }
+      }
+    }
+  }
+  return counter;
+}
+

tree.h

@@ -0,0 +1,28 @@
+/*
+** tree.h
+** TecCGraf - PUC-Rio
+** $Id: tree.h,v 1.12 1996/02/12 18:32:40 roberto Exp roberto $
+*/
+
+#ifndef tree_h
+#define tree_h
+
+#include "types.h"
+
+#define NOT_USED  0xFFFE
+
+
+typedef struct TaggedString
+{
+  unsigned short varindex;  /* != NOT_USED  if this is a symbol */
+  unsigned short constindex;  /* != NOT_USED  if this is a constant */
+  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 */
+} TaggedString;
+ 
+
+TaggedString *lua_createstring (char *str);
+Long lua_strcollector (void);
+
+#endif

types.h

@@ -0,0 +1,29 @@
+/*
+** TeCGraf - PUC-Rio
+** $Id: types.h,v 1.3 1995/02/06 19:32:43 roberto Exp roberto $
+*/
+
+#ifndef types_h
+#define types_h
+
+#include <limits.h>
+
+#ifndef real
+#define real float
+#endif
+
+#define Byte lua_Byte	/* some systems have Byte as a predefined type */
+typedef unsigned char  Byte;  /* unsigned 8 bits */
+
+#define Word lua_Word	/* some systems have Word as a predefined type */
+typedef unsigned short Word;  /* unsigned 16 bits */
+
+#define MAX_WORD  (USHRT_MAX-2)  /* maximum value of a word (-2 for safety) */
+#define MAX_INT   (INT_MAX-2)  /* maximum value of a int (-2 for safety) */
+
+#define Long lua_Long	/* some systems have Long as a predefined type */
+typedef signed long  Long;  /* 32 bits */
+
+typedef unsigned int IntPoint; /* unsigned with same size as a pointer (for hashing) */
+
+#endif

ugly.h

@@ -0,0 +1,36 @@
+/*
+** 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

y_tab.h

@@ -1,35 +0,0 @@
-
-typedef union  
-{
- int   vInt;
- long  vLong;
- float vFloat;
- Word  vWord;
- Byte *pByte;
-} YYSTYPE;
-extern YYSTYPE yylval;
-# define NIL 257
-# define IF 258
-# define THEN 259
-# define ELSE 260
-# define ELSEIF 261
-# define WHILE 262
-# define DO 263
-# define REPEAT 264
-# define UNTIL 265
-# define END 266
-# define RETURN 267
-# define LOCAL 268
-# define NUMBER 269
-# define FUNCTION 270
-# define NAME 271
-# define STRING 272
-# define DEBUG 273
-# define NOT 274
-# define AND 275
-# define OR 276
-# define NE 277
-# define LE 278
-# define GE 279
-# define CONC 280
-# define UNARY 281