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src/Source/LibJPEG/cdjpeg.c  view on Meta::CPAN

}


GLOBAL(void)
start_progress_monitor (j_common_ptr cinfo, cd_progress_ptr progress)
{
  /* Enable progress display, unless trace output is on */
  if (cinfo->err->trace_level == 0) {
    progress->pub.progress_monitor = progress_monitor;
    progress->completed_extra_passes = 0;
    progress->total_extra_passes = 0;
    progress->percent_done = -1;
    cinfo->progress = &progress->pub;
  }
}


GLOBAL(void)
end_progress_monitor (j_common_ptr cinfo)
{
  /* Clear away progress display */
  if (cinfo->err->trace_level == 0) {
    fprintf(stderr, "\r                \r");
    fflush(stderr);
  }
}

#endif


/*
 * Case-insensitive matching of possibly-abbreviated keyword switches.
 * keyword is the constant keyword (must be lower case already),
 * minchars is length of minimum legal abbreviation.
 */

GLOBAL(boolean)
keymatch (char * arg, const char * keyword, int minchars)
{
  register int ca, ck;
  register int nmatched = 0;

  while ((ca = *arg++) != '\0') {
    if ((ck = *keyword++) == '\0')
      return FALSE;		/* arg longer than keyword, no good */
    if (isupper(ca))		/* force arg to lcase (assume ck is already) */
      ca = tolower(ca);
    if (ca != ck)
      return FALSE;		/* no good */
    nmatched++;			/* count matched characters */
  }
  /* reached end of argument; fail if it's too short for unique abbrev */
  if (nmatched < minchars)
    return FALSE;
  return TRUE;			/* A-OK */
}


/*
 * Routines to establish binary I/O mode for stdin and stdout.
 * Non-Unix systems often require some hacking to get out of text mode.
 */

GLOBAL(FILE *)
read_stdin (void)
{
  FILE * input_file = stdin;

#ifdef USE_SETMODE		/* need to hack file mode? */
  setmode(fileno(stdin), O_BINARY);
#endif
#ifdef USE_FDOPEN		/* need to re-open in binary mode? */
  if ((input_file = fdopen(fileno(stdin), READ_BINARY)) == NULL) {
    fprintf(stderr, "Cannot reopen stdin\n");
    exit(EXIT_FAILURE);
  }
#endif
  return input_file;
}


GLOBAL(FILE *)
write_stdout (void)
{
  FILE * output_file = stdout;

#ifdef USE_SETMODE		/* need to hack file mode? */
  setmode(fileno(stdout), O_BINARY);
#endif
#ifdef USE_FDOPEN		/* need to re-open in binary mode? */
  if ((output_file = fdopen(fileno(stdout), WRITE_BINARY)) == NULL) {
    fprintf(stderr, "Cannot reopen stdout\n");
    exit(EXIT_FAILURE);
  }
#endif
  return output_file;
}