sdlEnumerateDirectory function filesystem

bool sdlEnumerateDirectory(String? path, Pointer<NativeFunction<SdlEnumerateDirectoryCallback>> callback, Pointer<NativeType> userdata)

Enumerate a directory through a callback function.

This function provides every directory entry through an app-provided callback, called once for each directory entry, until all results have been provided or the callback returns either SDL_ENUM_SUCCESS or SDL_ENUM_FAILURE.

This will return false if there was a system problem in general, or if a callback returns SDL_ENUM_FAILURE. A successful return means a callback returned SDL_ENUM_SUCCESS to halt enumeration, or all directory entries were enumerated.

\param path the path of the directory to enumerate. \param callback a function that is called for each entry in the directory. \param userdata a pointer that is passed to callback. \returns true on success or false on failure; call SDL_GetError() for more information.

\threadsafety It is safe to call this function from any thread.

\since This function is available since SDL 3.2.0.

extern SDL_DECLSPEC bool SDLCALL SDL_EnumerateDirectory(const char *path, SDL_EnumerateDirectoryCallback callback, void *userdata)

Implementation

bool sdlEnumerateDirectory(
  String? path,
  Pointer<NativeFunction<SdlEnumerateDirectoryCallback>> callback,
  Pointer<NativeType> userdata,
) {
  final sdlEnumerateDirectoryLookupFunction = _libSdl
      .lookupFunction<
        Uint8 Function(
          Pointer<Utf8> path,
          Pointer<NativeFunction<SdlEnumerateDirectoryCallback>> callback,
          Pointer<NativeType> userdata,
        ),
        int Function(
          Pointer<Utf8> path,
          Pointer<NativeFunction<SdlEnumerateDirectoryCallback>> callback,
          Pointer<NativeType> userdata,
        )
      >('SDL_EnumerateDirectory');
  final pathPointer = path != null ? path.toNativeUtf8() : nullptr;
  final result =
      sdlEnumerateDirectoryLookupFunction(pathPointer, callback, userdata) == 1;
  calloc.free(pathPointer);
  return result;
}