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 =
36 (int)(prog->pub.pass_counter * 100L / prog->pub.pass_limit);
37
38 if (percent_done != prog->percent_done) {
39 prog->percent_done = percent_done;
40 if (total_passes > 1) {
41 fprintf(stderr, "\rPass %d/%d: %3d%% ",
42 prog->pub.completed_passes + prog->completed_extra_passes + 1,
43 total_passes, percent_done);
44 } else {
45 fprintf(stderr, "\r %3d%% ", percent_done);
46 }
47 fflush(stderr);
48 }
49 }
50
51
52 GLOBAL(void)
start_progress_monitor(j_common_ptr cinfo,cd_progress_ptr progress)53 start_progress_monitor(j_common_ptr cinfo, cd_progress_ptr progress)
54 {
55 /* Enable progress display, unless trace output is on */
56 if (cinfo->err->trace_level == 0) {
57 progress->pub.progress_monitor = progress_monitor;
58 progress->completed_extra_passes = 0;
59 progress->total_extra_passes = 0;
60 progress->percent_done = -1;
61 cinfo->progress = &progress->pub;
62 }
63 }
64
65
66 GLOBAL(void)
end_progress_monitor(j_common_ptr cinfo)67 end_progress_monitor(j_common_ptr cinfo)
68 {
69 /* Clear away progress display */
70 if (cinfo->err->trace_level == 0) {
71 fprintf(stderr, "\r \r");
72 fflush(stderr);
73 }
74 }
75
76 #endif
77
78
79 /*
80 * Case-insensitive matching of possibly-abbreviated keyword switches.
81 * keyword is the constant keyword (must be lower case already),
82 * minchars is length of minimum legal abbreviation.
83 */
84
85 GLOBAL(boolean)
keymatch(char * arg,const char * keyword,int minchars)86 keymatch(char *arg, const char *keyword, int minchars)
87 {
88 register int ca, ck;
89 register int nmatched = 0;
90
91 while ((ca = *arg++) != '\0') {
92 if ((ck = *keyword++) == '\0')
93 return FALSE; /* arg longer than keyword, no good */
94 if (isupper(ca)) /* force arg to lcase (assume ck is already) */
95 ca = tolower(ca);
96 if (ca != ck)
97 return FALSE; /* no good */
98 nmatched++; /* count matched characters */
99 }
100 /* reached end of argument; fail if it's too short for unique abbrev */
101 if (nmatched < minchars)
102 return FALSE;
103 return TRUE; /* A-OK */
104 }
105
106
107 /*
108 * Routines to establish binary I/O mode for stdin and stdout.
109 * Non-Unix systems often require some hacking to get out of text mode.
110 */
111
112 GLOBAL(FILE *)
read_stdin(void)113 read_stdin(void)
114 {
115 FILE *input_file = stdin;
116
117 #ifdef USE_SETMODE /* need to hack file mode? */
118 setmode(fileno(stdin), O_BINARY);
119 #endif
120 #ifdef USE_FDOPEN /* need to re-open in binary mode? */
121 if ((input_file = fdopen(fileno(stdin), READ_BINARY)) == NULL) {
122 fprintf(stderr, "Cannot reopen stdin\n");
123 exit(EXIT_FAILURE);
124 }
125 #endif
126 return input_file;
127 }
128
129
130 GLOBAL(FILE *)
write_stdout(void)131 write_stdout(void)
132 {
133 FILE *output_file = stdout;
134
135 #ifdef USE_SETMODE /* need to hack file mode? */
136 setmode(fileno(stdout), O_BINARY);
137 #endif
138 #ifdef USE_FDOPEN /* need to re-open in binary mode? */
139 if ((output_file = fdopen(fileno(stdout), WRITE_BINARY)) == NULL) {
140 fprintf(stderr, "Cannot reopen stdout\n");
141 exit(EXIT_FAILURE);
142 }
143 #endif
144 return output_file;
145 }
146