add util.h single file header

src/main.cpp

@@ -11,6 +11,8 @@
 #include "GLDebug.h"
 #include "shader.h"
 #include "types.h"
+#define UTIL_IMPLEMENTATION
+#include "util.h"
 
 
 struct SDLHandles

src/shader.cpp

@@ -13,6 +13,7 @@
 #define GL_DEBUG_IMPLEMENTATION
 #include "GLDebug.h"
 #include "shader.h"
+#include "util.h"
 
 
 

src/util.h

@@ -0,0 +1,36 @@
+
+#include <cassert>
+#include <cstring>
+
+#include "types.h"
+
+
+char* utilAllocateCStr(const char* str, u32 max_len = 256);
+void utilSafeFree(void* p);
+
+
+#ifdef UTIL_IMPLEMENTATION
+
+char*
+utilAllocateCStr(const char* str, u32 max_len)
+{
+	u32 len = strlen(str) + 1;
+
+	if (len > max_len) {
+		printf("%s(), %s , longer than %i\n", __FUNCTION__, str, max_len);
+		return nullptr;
+	}
+
+	char* out = (char*) std::calloc(len, sizeof(u8));
+	strncpy(out, str, len - 1);
+	return out;
+}
+
+void
+utilSafeFree(void* p)
+{
+	assert(p != nullptr);
+	free(p);
+}
+
+#endif