From 0ae66d27039481dc2a507bbc8482f691037c1a5a Mon Sep 17 00:00:00 2001
From: Kim Kulling <kimkulling@users.noreply.github.com>
Date: Tue, 8 Apr 2025 13:14:10 +0200
Subject: [PATCH] Fix set (#6073)

* Fix set

* Fix: Fix implicite cast from size_t to uint32_t
---
 include/assimp/types.h | 19 ++++++++++++++-----
 1 file changed, 14 insertions(+), 5 deletions(-)

diff --git a/include/assimp/types.h b/include/assimp/types.h
index 920f7fa7a..f2da91d4f 100644
--- a/include/assimp/types.h
+++ b/include/assimp/types.h
@@ -303,12 +303,21 @@ struct aiString {
     }
 
     /** Copy a const char* to the aiString */
-    void Set(const char *sz) {
-        ai_int32 len = (ai_uint32)::strlen(sz);
-        if (len > static_cast<ai_int32>(AI_MAXLEN - 1)) {
-            len = static_cast<ai_int32>(AI_MAXLEN - 1);
+    void Set(const char *sz, size_t maxlen) {
+        if (sz == nullptr) {
+            return;
         }
-        length = len;
+        size_t len = 0;
+        for (size_t i=0; i<maxlen; ++i) {
+            if (sz[i] == '\0') {
+                break;
+            }
+            ++len;
+        }
+        if (len > AI_MAXLEN - 1) {
+            len = AI_MAXLEN - 1;
+        }
+        length = static_cast<uint32_t>(len);
         memcpy(data, sz, len);
         data[len] = 0;
     }