kc3-lang/libjpeg-turbo/cdjpeg.c

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• Hash : 1f55ae7b
  Author :
  Date : 2022-01-06T12:08:46
  

  Fix -Wpedantic compiler warnings
  
  ... and test for those warnings (and others) when performing CI builds.
  

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• cdjpeg.c

• /*
   * cdjpeg.c
   *
   * This file was part of the Independent JPEG Group's software:
   * Copyright (C) 1991-1997, Thomas G. Lane.
   * libjpeg-turbo Modifications:
   * Copyright (C) 2019, 2022, D. R. Commander.
   * For conditions of distribution and use, see the accompanying README.ijg
   * file.
   *
   * This file contains common support routines used by the IJG application
   * programs (cjpeg, djpeg, jpegtran).
   */
  
  #include "cdjpeg.h"             /* Common decls for cjpeg/djpeg applications */
  #include <ctype.h>              /* to declare isupper(), tolower() */
  #ifdef USE_SETMODE
  #include <fcntl.h>              /* to declare setmode()'s parameter macros */
  /* If you have setmode() but not <io.h>, just delete this line: */
  #include <io.h>                 /* to declare setmode() */
  #endif
  
  
  /*
   * Optional progress monitor: display a percent-done figure on stderr.
   */
  
  METHODDEF(void)
  progress_monitor(j_common_ptr cinfo)
  {
    cd_progress_ptr prog = (cd_progress_ptr)cinfo->progress;
  
    if (prog->max_scans != 0 && cinfo->is_decompressor) {
      int scan_no = ((j_decompress_ptr)cinfo)->input_scan_number;
  
      if (scan_no > (int)prog->max_scans) {
        fprintf(stderr, "Scan number %d exceeds maximum scans (%u)\n", scan_no,
                prog->max_scans);
        exit(EXIT_FAILURE);
      }
    }
  
    if (prog->report) {
      int total_passes = prog->pub.total_passes + prog->total_extra_passes;
      int percent_done =
        (int)(prog->pub.pass_counter * 100L / prog->pub.pass_limit);
  
      if (percent_done != prog->percent_done) {
        prog->percent_done = percent_done;
        if (total_passes > 1) {
          fprintf(stderr, "\rPass %d/%d: %3d%% ",
                  prog->pub.completed_passes + prog->completed_extra_passes + 1,
                  total_passes, percent_done);
        } else {
          fprintf(stderr, "\r %3d%% ", percent_done);
        }
        fflush(stderr);
      }
    }
  }
  
  
  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->max_scans = 0;
      progress->report = FALSE;
      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);
    }
  }
  
  
  /*
   * 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;
  }
  

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