From 0949983acccdece1c76e6d30585a4503c9cad6e5 Mon Sep 17 00:00:00 2001
From: "copilot-swe-agent[bot]" <198982749+Copilot@users.noreply.github.com>
Date: Fri, 20 Mar 2026 21:15:45 +0000
Subject: [PATCH 1/2] Initial plan


From 5e0c5b9ada589a72c2153b49e61348d1ef548e23 Mon Sep 17 00:00:00 2001
From: "copilot-swe-agent[bot]" <198982749+Copilot@users.noreply.github.com>
Date: Fri, 20 Mar 2026 21:21:35 +0000
Subject: [PATCH 2/2] Fix tg3__arena_strdup to distinguish empty strings from
 absent strings

Co-authored-by: syoyo <18676+syoyo@users.noreply.github.com>
Agent-Logs-Url: https://github.com/syoyo/tinygltf/sessions/445ab61b-4294-45e6-8faf-4f2fc8dfe369
---
 tiny_gltf_v3.h | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/tiny_gltf_v3.h b/tiny_gltf_v3.h
index 931af22..01a58f0 100644
--- a/tiny_gltf_v3.h
+++ b/tiny_gltf_v3.h
@@ -1358,10 +1358,13 @@ static void *tg3__arena_alloc(tg3_arena *arena, size_t size) {
 }
 
 static char *tg3__arena_strdup(tg3_arena *arena, const char *s, size_t len) {
-    if (!s || len == 0) return NULL;
+    if (!s) return NULL;
+    /* Allocate len+1 bytes; when len==0 this produces a 1-byte "\0" buffer so
+     * that empty strings (data!=NULL, len==0) remain distinguishable from
+     * absent strings (data==NULL, len==0). */
     char *dst = (char *)tg3__arena_alloc(arena, len + 1);
     if (!dst) return NULL;
-    memcpy(dst, s, len);
+    if (len > 0) memcpy(dst, s, len);
     dst[len] = '\0';
     return dst;
 }