Function GetDirectoriesInPath

Descent3/newui_filedlg.cpp:531–586

returns the number of directories in path p it fills in buffer (up to maxcount) with the directories found

// returns the number of directories in path p
// it fills in buffer (up to maxcount) with the directories found
int GetDirectoriesInPath(char **buffer, int maxcount, const char *p) {
  ASSERT(buffer);
  ASSERT(p);
  if (maxcount <= 0)
    return 0;

  int i;
  for (i = 0; i < maxcount; i++) {
    buffer[i] = NULL;
  }

  char old_path[_MAX_PATH], path[_MAX_PATH];

  ddio_GetWorkingDir(old_path, _MAX_PATH);
  if (!ddio_SetWorkingDir(p)) {
    // directory doesn't exist
    ddio_SetWorkingDir(old_path);
    return -1;
  }

  ddio_GetWorkingDir(path, _MAX_PATH);
  if (stricmp(path, p)) {
    // the working dir is not the same as the passed in path, so try to create a correct path and set it
    ddio_MakePath(path, p, "", NULL);
    if (!ddio_SetWorkingDir(path)) {
      ddio_SetWorkingDir(old_path);
      return -1;
    }
  }

  int count = 0;
  char tempbuffer[_MAX_PATH];

  if (ddio_FindFileStart("*", tempbuffer)) {
    if (std::filesystem::is_directory(tempbuffer)) {
      buffer[count] = mem_strdup(tempbuffer);
      count++;
    }

    bool done = false;

    while (!done) {
      if (ddio_FindNextFile(tempbuffer)) {
        if (std::filesystem::is_directory(tempbuffer)) {
          if (count < maxcount)
            buffer[count] = mem_strdup(tempbuffer);
          count++;
        }
      } else
        done = true;
    }
  }
  ddio_FindFileClose();
  ddio_SetWorkingDir(old_path);
  return count;
}

// Updates the given listbox with the directories and files that match wildcards (each wildcard seperates by a ;)