Mercurial > hgrepos > Python2 > PyMuPDF

comparison mupdf-source/thirdparty/libjpeg/cdjpeg.c @ 2:b50eed0cc0ef upstream

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4. The directory name has changed: no version number in the expanded directory now.
author Franz Glasner <fzglas.hg@dom66.de>
date Mon, 15 Sep 2025 11:43:07 +0200
parents
children
comparison
equal deleted inserted replaced
1:1d09e1dec1d9 2:b50eed0cc0ef
1 /*
2 * cdjpeg.c
3 *
4 * Copyright (C) 1991-1997, Thomas G. Lane.
5 * This file is part of the Independent JPEG Group's software.
6 * For conditions of distribution and use, see the accompanying README file.
7 *
8 * This file contains common support routines used by the IJG application
9 * programs (cjpeg, djpeg, jpegtran).
10 */
11
12 #include "cdjpeg.h" /* Common decls for cjpeg/djpeg applications */
13 #include <ctype.h> /* to declare isupper(), tolower() */
14 #ifdef NEED_SIGNAL_CATCHER
15 #include <signal.h> /* to declare signal() */
16 #endif
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 * Signal catcher to ensure that temporary files are removed before aborting.
26 * NB: for Amiga Manx C this is actually a global routine named _abort();
27 * we put "#define signal_catcher _abort" in jconfig.h. Talk about bogus...
28 */
29
30 #ifdef NEED_SIGNAL_CATCHER
31
32 static j_common_ptr sig_cinfo;
33
34 void /* must be global for Manx C */
35 signal_catcher (int signum)
36 {
37 if (sig_cinfo != NULL) {
38 if (sig_cinfo->err != NULL) /* turn off trace output */
39 sig_cinfo->err->trace_level = 0;
40 jpeg_destroy(sig_cinfo); /* clean up memory allocation & temp files */
41 }
42 exit(EXIT_FAILURE);
43 }
44
45
46 GLOBAL(void)
47 enable_signal_catcher (j_common_ptr cinfo)
48 {
49 sig_cinfo = cinfo;
50 #ifdef SIGINT /* not all systems have SIGINT */
51 signal(SIGINT, signal_catcher);
52 #endif
53 #ifdef SIGTERM /* not all systems have SIGTERM */
54 signal(SIGTERM, signal_catcher);
55 #endif
56 }
57
58 #endif
59
60
61 /*
62 * Optional progress monitor: display a percent-done figure on stderr.
63 */
64
65 #ifdef PROGRESS_REPORT
66
67 METHODDEF(void)
68 progress_monitor (j_common_ptr cinfo)
69 {
70 cd_progress_ptr prog = (cd_progress_ptr) cinfo->progress;
71 int total_passes = prog->pub.total_passes + prog->total_extra_passes;
72 int percent_done = (int) (prog->pub.pass_counter*100L/prog->pub.pass_limit);
73
74 if (percent_done != prog->percent_done) {
75 prog->percent_done = percent_done;
76 if (total_passes > 1) {
77 fprintf(stderr, "\rPass %d/%d: %3d%% ",
78 prog->pub.completed_passes + prog->completed_extra_passes + 1,
79 total_passes, percent_done);
80 } else {
81 fprintf(stderr, "\r %3d%% ", percent_done);
82 }
83 fflush(stderr);
84 }
85 }
86
87
88 GLOBAL(void)
89 start_progress_monitor (j_common_ptr cinfo, cd_progress_ptr progress)
90 {
91 /* Enable progress display, unless trace output is on */
92 if (cinfo->err->trace_level == 0) {
93 progress->pub.progress_monitor = progress_monitor;
94 progress->completed_extra_passes = 0;
95 progress->total_extra_passes = 0;
96 progress->percent_done = -1;
97 cinfo->progress = &progress->pub;
98 }
99 }
100
101
102 GLOBAL(void)
103 end_progress_monitor (j_common_ptr cinfo)
104 {
105 /* Clear away progress display */
106 if (cinfo->err->trace_level == 0) {
107 fprintf(stderr, "\r \r");
108 fflush(stderr);
109 }
110 }
111
112 #endif
113
114
115 /*
116 * Case-insensitive matching of possibly-abbreviated keyword switches.
117 * keyword is the constant keyword (must be lower case already),
118 * minchars is length of minimum legal abbreviation.
119 */
120
121 GLOBAL(boolean)
122 keymatch (char * arg, const char * keyword, int minchars)
123 {
124 register int ca, ck;
125 register int nmatched = 0;
126
127 while ((ca = *arg++) != '\0') {
128 if ((ck = *keyword++) == '\0')
129 return FALSE; /* arg longer than keyword, no good */
130 if (isupper(ca)) /* force arg to lcase (assume ck is already) */
131 ca = tolower(ca);
132 if (ca != ck)
133 return FALSE; /* no good */
134 nmatched++; /* count matched characters */
135 }
136 /* reached end of argument; fail if it's too short for unique abbrev */
137 if (nmatched < minchars)
138 return FALSE;
139 return TRUE; /* A-OK */
140 }
141
142
143 /*
144 * Routines to establish binary I/O mode for stdin and stdout.
145 * Non-Unix systems often require some hacking to get out of text mode.
146 */
147
148 GLOBAL(FILE *)
149 read_stdin (void)
150 {
151 FILE * input_file = stdin;
152
153 #ifdef USE_SETMODE /* need to hack file mode? */
154 setmode(fileno(stdin), O_BINARY);
155 #endif
156 #ifdef USE_FDOPEN /* need to re-open in binary mode? */
157 if ((input_file = fdopen(fileno(stdin), READ_BINARY)) == NULL) {
158 fprintf(stderr, "Cannot reopen stdin\n");
159 exit(EXIT_FAILURE);
160 }
161 #endif
162 return input_file;
163 }
164
165
166 GLOBAL(FILE *)
167 write_stdout (void)
168 {
169 FILE * output_file = stdout;
170
171 #ifdef USE_SETMODE /* need to hack file mode? */
172 setmode(fileno(stdout), O_BINARY);
173 #endif
174 #ifdef USE_FDOPEN /* need to re-open in binary mode? */
175 if ((output_file = fdopen(fileno(stdout), WRITE_BINARY)) == NULL) {
176 fprintf(stderr, "Cannot reopen stdout\n");
177 exit(EXIT_FAILURE);
178 }
179 #endif
180 return output_file;
181 }