conversion to c by gemini 4 argon

tools/build_system.c

@@ -298,10 +298,13 @@ static int CompareFilePaths(const void* a, const void* b)
 
 static bool GenerateUnityFiles(const UnityConfig* ucfg)
 {
+    const char* unityExt = (ucfg->SourceDir[0] != '\0') ? ".c" : ".cpp";
+    const char* staleExt = (ucfg->SourceDir[0] != '\0') ? ".cpp" : ".c";
+
     FilePathList* srcFiles = CreateFilePathList();
     if (ucfg->SourceDir[0] != '\0')
     {
-        CollectFiles(ucfg->SourceDir, NULL, ".cpp", srcFiles);
+        CollectFiles(ucfg->SourceDir, NULL, ".c", srcFiles);
     }
     else
     {
@@ -328,6 +331,7 @@ static bool GenerateUnityFiles(const UnityConfig* ucfg)
 
     bool anyChanged = false;
     char currentUnityPath[MAX_PATH_LEN];
+    char staleUnityPath[MAX_PATH_LEN];
     char* memBuf = (char*)ArenaPush(1024 * 1024);
 
     // Determine hot/cold for each file
@@ -376,7 +380,13 @@ static bool GenerateUnityFiles(const UnityConfig* ucfg)
             memOffset += sprintf_s(memBuf + memOffset, (1024 * 1024) - memOffset, "// Empty bucket\n");
         }
 
-        snprintf(currentUnityPath, sizeof(currentUnityPath), "%s\\%s%d.cpp", ucfg->OutputDir, ucfg->Prefix, b + 1);
+        snprintf(staleUnityPath, sizeof(staleUnityPath), "%s\\%s%d%s", ucfg->OutputDir, ucfg->Prefix, b + 1, staleExt);
+        if (FileExists(staleUnityPath)) {
+            DeleteFileA(staleUnityPath);
+            anyChanged = true;
+        }
+
+        snprintf(currentUnityPath, sizeof(currentUnityPath), "%s\\%s%d%s", ucfg->OutputDir, ucfg->Prefix, b + 1, unityExt);
         FileContent exist = ReadEntireFile(currentUnityPath);
         bool write = true;
         if (exist.Data && exist.Size == memOffset && memcmp(exist.Data, memBuf, memOffset) == 0) write = false;
@@ -410,8 +420,14 @@ static bool GenerateUnityFiles(const UnityConfig* ucfg)
         for (int k = 0; absPath[k]; k++) { if (absPath[k] == '\\') absPath[k] = '/'; }
 
         int memOffset = sprintf_s(memBuf, (1024 * 1024), "#include \"%s\"\n", absPath);
+
+        snprintf(staleUnityPath, sizeof(staleUnityPath), "%s\\%s_Hot%d%s", ucfg->OutputDir, ucfg->Prefix, i, staleExt);
+        if (FileExists(staleUnityPath)) {
+            DeleteFileA(staleUnityPath);
+            anyChanged = true;
+        }
         
-        snprintf(currentUnityPath, sizeof(currentUnityPath), "%s\\%s_Hot%d.cpp", ucfg->OutputDir, ucfg->Prefix, i);
+        snprintf(currentUnityPath, sizeof(currentUnityPath), "%s\\%s_Hot%d%s", ucfg->OutputDir, ucfg->Prefix, i, unityExt);
         FileContent exist = ReadEntireFile(currentUnityPath);
         bool write = true;
         if (exist.Data && exist.Size == memOffset && memcmp(exist.Data, memBuf, memOffset) == 0) write = false;
@@ -438,7 +454,12 @@ static bool GenerateUnityFiles(const UnityConfig* ucfg)
     // Cleanup unused cold buckets
     for (int b = numBuckets; b < numBuckets + 100; b++)
     {
-        snprintf(currentUnityPath, sizeof(currentUnityPath), "%s\\%s%d.cpp", ucfg->OutputDir, ucfg->Prefix, b + 1);
+        snprintf(staleUnityPath, sizeof(staleUnityPath), "%s\\%s%d%s", ucfg->OutputDir, ucfg->Prefix, b + 1, staleExt);
+        if (FileExists(staleUnityPath)) {
+            DeleteFileA(staleUnityPath);
+            anyChanged = true;
+        }
+        snprintf(currentUnityPath, sizeof(currentUnityPath), "%s\\%s%d%s", ucfg->OutputDir, ucfg->Prefix, b + 1, unityExt);
         if (FileExists(currentUnityPath)) {
             DeleteFileA(currentUnityPath);
             anyChanged = true;
@@ -450,10 +471,15 @@ static bool GenerateUnityFiles(const UnityConfig* ucfg)
     // Cleanup unused hot files
     for (int i = 0; i < srcFiles->Count + 1000; i++)
     {
+        snprintf(staleUnityPath, sizeof(staleUnityPath), "%s\\%s_Hot%d%s", ucfg->OutputDir, ucfg->Prefix, i, staleExt);
+        if (FileExists(staleUnityPath)) {
+            DeleteFileA(staleUnityPath);
+            anyChanged = true;
+        }
         bool shouldExist = (i < srcFiles->Count && isHot[i]);
         if (!shouldExist)
         {
-            snprintf(currentUnityPath, sizeof(currentUnityPath), "%s\\%s_Hot%d.cpp", ucfg->OutputDir, ucfg->Prefix, i);
+            snprintf(currentUnityPath, sizeof(currentUnityPath), "%s\\%s_Hot%d%s", ucfg->OutputDir, ucfg->Prefix, i, unityExt);
             if (FileExists(currentUnityPath)) {
                 DeleteFileA(currentUnityPath);
                 anyChanged = true;
@@ -1770,6 +1796,8 @@ static void generate_compile_commands(
             }
             is_first_entry = false;
 
+            const char* lang_flag = EndsWithNoCase(full_path, ".c") ? "/clang:-std=c99" : "/std:c++20";
+
             offset += sprintf_s(json_buf + offset, buffer_size - offset,
                 "  {\n"
                 "    \"directory\": \"%s\",\n"
@@ -1778,10 +1806,10 @@ static void generate_compile_commands(
                 "      \"clang-cl.exe\",\n"
                 "      \"--driver-mode=cl\",\n"
                 "      \"/nologo\",\n"
-                "      \"/std:c++20\",\n"
+                "      \"%s\",\n"
                 "      \"/W4\",\n"
                 "      \"/utf-8\",\n",
-                cwd, full_path);
+                cwd, full_path, lang_flag);
 
             for (int d = 0; d < def_common_count; d++)
             {