}
      blob_reset(&out);
    }

    /* Release memory resources */
    blob_reset(&file2);
  }else{
    int cnt = 0;
    Blob nameFile1;    /* Name of temporary file to old pFile1 content */
    Blob cmd;          /* Text of command to run */

    if( !fIncludeBinary ){
      Blob file2;
      if( isBin1 ){
        fossil_print("%s",DIFF_CANNOT_COMPUTE_BINARY);

        return;
      }
      blob_reset(&file2);
    }

    /* Construct a temporary file to hold pFile1 based on the name of
    ** zFile2 */
    blob_zero(&nameFile1);
    file_tempname(&nameFile1, zFile2);
    do{
      blob_reset(&nameFile1);
      blob_appendf(&nameFile1, "%s~%d", zFile2, cnt++);
    }while( file_access(blob_str(&nameFile1),F_OK)==0 );
    blob_write_to_file(pFile1, blob_str(&nameFile1));

    /* Construct the external diff command */
    blob_zero(&cmd);
    blob_append(&cmd, zDiffCmd, -1);
    if( fSwapDiff ){
      blob_append_escaped_arg(&cmd, zFile2);