1/*
2 * cdjpeg.c
3 *
4 * This file was part of the Independent JPEG Group's software:
5 * Copyright (C) 1991-1997, Thomas G. Lane.
6 * It was modified by The libjpeg-turbo Project to include only code relevant
7 * to libjpeg-turbo.
8 * For conditions of distribution and use, see the accompanying README.ijg
9 * file.
10 *
11 * This file contains common support routines used by the IJG application
12 * programs (cjpeg, djpeg, jpegtran).
13 */
14
15#include "cdjpeg.h"             /* Common decls for cjpeg/djpeg applications */
16#include <ctype.h>              /* to declare isupper(), tolower() */
17#ifdef USE_SETMODE
18#include <fcntl.h>              /* to declare setmode()'s parameter macros */
19/* If you have setmode() but not <io.h>, just delete this line: */
20#include <io.h>                 /* to declare setmode() */
21#endif
22
23
24/*
25 * Optional progress monitor: display a percent-done figure on stderr.
26 */
27
28#ifdef PROGRESS_REPORT
29
30METHODDEF(void)
31progress_monitor (j_common_ptr cinfo)
32{
33  cd_progress_ptr prog = (cd_progress_ptr) cinfo->progress;
34  int total_passes = prog->pub.total_passes + prog->total_extra_passes;
35  int percent_done = (int) (prog->pub.pass_counter*100L/prog->pub.pass_limit);
36
37  if (percent_done != prog->percent_done) {
38    prog->percent_done = percent_done;
39    if (total_passes > 1) {
40      fprintf(stderr, "\rPass %d/%d: %3d%% ",
41              prog->pub.completed_passes + prog->completed_extra_passes + 1,
42              total_passes, percent_done);
43    } else {
44      fprintf(stderr, "\r %3d%% ", percent_done);
45    }
46    fflush(stderr);
47  }
48}
49
50
51GLOBAL(void)
52start_progress_monitor (j_common_ptr cinfo, cd_progress_ptr progress)
53{
54  /* Enable progress display, unless trace output is on */
55  if (cinfo->err->trace_level == 0) {
56    progress->pub.progress_monitor = progress_monitor;
57    progress->completed_extra_passes = 0;
58    progress->total_extra_passes = 0;
59    progress->percent_done = -1;
60    cinfo->progress = &progress->pub;
61  }
62}
63
64
65GLOBAL(void)
66end_progress_monitor (j_common_ptr cinfo)
67{
68  /* Clear away progress display */
69  if (cinfo->err->trace_level == 0) {
70    fprintf(stderr, "\r                \r");
71    fflush(stderr);
72  }
73}
74
75#endif
76
77
78/*
79 * Case-insensitive matching of possibly-abbreviated keyword switches.
80 * keyword is the constant keyword (must be lower case already),
81 * minchars is length of minimum legal abbreviation.
82 */
83
84GLOBAL(boolean)
85keymatch (char *arg, const char *keyword, int minchars)
86{
87  register int ca, ck;
88  register int nmatched = 0;
89
90  while ((ca = *arg++) != '\0') {
91    if ((ck = *keyword++) == '\0')
92      return FALSE;             /* arg longer than keyword, no good */
93    if (isupper(ca))            /* force arg to lcase (assume ck is already) */
94      ca = tolower(ca);
95    if (ca != ck)
96      return FALSE;             /* no good */
97    nmatched++;                 /* count matched characters */
98  }
99  /* reached end of argument; fail if it's too short for unique abbrev */
100  if (nmatched < minchars)
101    return FALSE;
102  return TRUE;                  /* A-OK */
103}
104
105
106/*
107 * Routines to establish binary I/O mode for stdin and stdout.
108 * Non-Unix systems often require some hacking to get out of text mode.
109 */
110
111GLOBAL(FILE *)
112read_stdin (void)
113{
114  FILE * input_file = stdin;
115
116#ifdef USE_SETMODE              /* need to hack file mode? */
117  setmode(fileno(stdin), O_BINARY);
118#endif
119#ifdef USE_FDOPEN               /* need to re-open in binary mode? */
120  if ((input_file = fdopen(fileno(stdin), READ_BINARY)) == NULL) {
121    fprintf(stderr, "Cannot reopen stdin\n");
122    exit(EXIT_FAILURE);
123  }
124#endif
125  return input_file;
126}
127
128
129GLOBAL(FILE *)
130write_stdout (void)
131{
132  FILE * output_file = stdout;
133
134#ifdef USE_SETMODE              /* need to hack file mode? */
135  setmode(fileno(stdout), O_BINARY);
136#endif
137#ifdef USE_FDOPEN               /* need to re-open in binary mode? */
138  if ((output_file = fdopen(fileno(stdout), WRITE_BINARY)) == NULL) {
139    fprintf(stderr, "Cannot reopen stdout\n");
140    exit(EXIT_FAILURE);
141  }
142#endif
143  return output_file;
144}
145