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
30 METHODDEF(void)
progress_monitor(j_common_ptr cinfo)31 progress_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
51 GLOBAL(void)
start_progress_monitor(j_common_ptr cinfo,cd_progress_ptr progress)52 start_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
65 GLOBAL(void)
end_progress_monitor(j_common_ptr cinfo)66 end_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
84 GLOBAL(boolean)
keymatch(char * arg,const char * keyword,int minchars)85 keymatch (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
111 GLOBAL(FILE *)
read_stdin(void)112 read_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
129 GLOBAL(FILE *)
write_stdout(void)130 write_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