bool save()

in src/annoylib.h [1093:1127]

• 30 lines of code
• 6 McCabe index (conditional complexity)

  bool save(const char* filename, bool prefault=false, char** error=NULL) {
    if (!_built) {
      set_error_from_string(error, "You can't save an index that hasn't been built");
      return false;
    }
    if (_on_disk) {
      return true;
    } else {
      // Delete file if it already exists (See issue #335)
#ifndef _MSC_VER
      unlink(filename);
#else
      _unlink(filename);
#endif

      FILE *f = fopen(filename, "wb");
      if (f == NULL) {
        set_error_from_errno(error, "Unable to open");
        return false;
      }

      if (fwrite(_nodes, _s, _n_nodes, f) != (size_t) _n_nodes) {
        set_error_from_errno(error, "Unable to write");
        return false;
      }

      if (fclose(f) == EOF) {
        set_error_from_errno(error, "Unable to close");
        return false;
      }

      unload();
      return load(filename, prefault, error);
    }
  }