ADDED: IsPathAbsolute() to check absolute paths

src/raylib.h

@@ -1162,6 +1162,7 @@ RLAPI int MakeDirectory(const char *dirPath);                       // Create di
 RLAPI int ChangeDirectory(const char *dirPath);                     // Change working directory, returns 0 on success
 RLAPI bool IsPathFile(const char *path);                            // Check if provided path points to a file
 RLAPI bool IsPathDirectory(const char *path);                       // Check if provided path points to a directory
+RLAPI bool IsPathAbsolute(const char *path);                        // Check if provided path is an absolute path
 RLAPI bool IsFileNameValid(const char *fileName);                   // Check if fileName is valid for the platform/OS
 RLAPI FilePathList LoadDirectoryFiles(const char *dirPath);         // Load directory filepaths, files and directories, no subdirs scan
 RLAPI FilePathList LoadDirectoryFilesEx(const char *basePath, const char *filter, bool scanSubdirs); // Load directory filepaths with extension filtering and subdir scan; some filters available: '*.*','FILES*','DIRS*'

src/rcore.c

@@ -2842,6 +2842,28 @@ bool IsPathDirectory(const char *path)
     return result;
 }
 
+// Check if provided path is an absolute path
+static bool IsPathAbsolute(const char *path)
+{
+    int result = false;
+    
+    if ((path != NULL) && (path[0] != '\0'))
+    {
+#if defined(_WIN32)
+        // UNC path (\\server\share)
+        if ((path[0] == '\\') && (path[1] == '\\')) result = true;
+        // Drive letter (e.g. C:\ or D:/)
+        else if (isalpha((unsigned char)path[0]) && (path[1] == ':') &&
+            ((path[2] == '\\') || (path[2] == '/'))) result = true;
+#else
+        // POSIX: must start with /
+        if (path[0] == '/') result = true;
+#endif
+    }
+
+    return result;
+}
+
 // Check if fileName is valid for the platform/OS
 bool IsFileNameValid(const char *fileName)
 {