Mercurial > hgrepos > Python2 > PyMuPDF

annotate mupdf-source/thirdparty/libjpeg/cdjpeg.c @ 40:aa33339d6b8a upstream

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ADD: MuPDF v1.26.10: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.5.
author Franz Glasner <fzglas.hg@dom66.de>
date Sat, 11 Oct 2025 11:31:38 +0200
parents b50eed0cc0ef
children
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b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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1 /*
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2 * cdjpeg.c
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3 *
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4 * Copyright (C) 1991-1997, Thomas G. Lane.
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5 * This file is part of the Independent JPEG Group's software.
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6 * For conditions of distribution and use, see the accompanying README file.
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7 *
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8 * This file contains common support routines used by the IJG application
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9 * programs (cjpeg, djpeg, jpegtran).
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10 */
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11
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12 #include "cdjpeg.h" /* Common decls for cjpeg/djpeg applications */
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13 #include <ctype.h> /* to declare isupper(), tolower() */
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14 #ifdef NEED_SIGNAL_CATCHER
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15 #include <signal.h> /* to declare signal() */
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16 #endif
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17 #ifdef USE_SETMODE
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18 #include <fcntl.h> /* to declare setmode()'s parameter macros */
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19 /* If you have setmode() but not <io.h>, just delete this line: */
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20 #include <io.h> /* to declare setmode() */
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21 #endif
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22
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23
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24 /*
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25 * Signal catcher to ensure that temporary files are removed before aborting.
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26 * NB: for Amiga Manx C this is actually a global routine named _abort();
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27 * we put "#define signal_catcher _abort" in jconfig.h. Talk about bogus...
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28 */
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29
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30 #ifdef NEED_SIGNAL_CATCHER
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32 static j_common_ptr sig_cinfo;
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33
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34 void /* must be global for Manx C */
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35 signal_catcher (int signum)
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36 {
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37 if (sig_cinfo != NULL) {
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38 if (sig_cinfo->err != NULL) /* turn off trace output */
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39 sig_cinfo->err->trace_level = 0;
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40 jpeg_destroy(sig_cinfo); /* clean up memory allocation & temp files */
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41 }
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42 exit(EXIT_FAILURE);
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43 }
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45
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46 GLOBAL(void)
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47 enable_signal_catcher (j_common_ptr cinfo)
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48 {
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49 sig_cinfo = cinfo;
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50 #ifdef SIGINT /* not all systems have SIGINT */
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51 signal(SIGINT, signal_catcher);
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52 #endif
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53 #ifdef SIGTERM /* not all systems have SIGTERM */
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54 signal(SIGTERM, signal_catcher);
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55 #endif
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56 }
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57
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58 #endif
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60
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61 /*
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62 * Optional progress monitor: display a percent-done figure on stderr.
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63 */
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64
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65 #ifdef PROGRESS_REPORT
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66
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67 METHODDEF(void)
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68 progress_monitor (j_common_ptr cinfo)
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69 {
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70 cd_progress_ptr prog = (cd_progress_ptr) cinfo->progress;
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71 int total_passes = prog->pub.total_passes + prog->total_extra_passes;
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72 int percent_done = (int) (prog->pub.pass_counter*100L/prog->pub.pass_limit);
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73
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74 if (percent_done != prog->percent_done) {
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75 prog->percent_done = percent_done;
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76 if (total_passes > 1) {
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77 fprintf(stderr, "\rPass %d/%d: %3d%% ",
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78 prog->pub.completed_passes + prog->completed_extra_passes + 1,
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79 total_passes, percent_done);
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80 } else {
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81 fprintf(stderr, "\r %3d%% ", percent_done);
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82 }
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83 fflush(stderr);
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84 }
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85 }
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86
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87
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88 GLOBAL(void)
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89 start_progress_monitor (j_common_ptr cinfo, cd_progress_ptr progress)
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90 {
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91 /* Enable progress display, unless trace output is on */
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92 if (cinfo->err->trace_level == 0) {
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93 progress->pub.progress_monitor = progress_monitor;
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94 progress->completed_extra_passes = 0;
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95 progress->total_extra_passes = 0;
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96 progress->percent_done = -1;
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97 cinfo->progress = &progress->pub;
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98 }
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99 }
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100
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101
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102 GLOBAL(void)
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103 end_progress_monitor (j_common_ptr cinfo)
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parents:
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104 {
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parents:
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105 /* Clear away progress display */
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parents:
diff changeset
106 if (cinfo->err->trace_level == 0) {
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parents:
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107 fprintf(stderr, "\r \r");
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108 fflush(stderr);
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109 }
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110 }
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111
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112 #endif
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113
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114
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115 /*
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116 * Case-insensitive matching of possibly-abbreviated keyword switches.
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117 * keyword is the constant keyword (must be lower case already),
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118 * minchars is length of minimum legal abbreviation.
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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119 */
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120
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parents:
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121 GLOBAL(boolean)
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122 keymatch (char * arg, const char * keyword, int minchars)
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123 {
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124 register int ca, ck;
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125 register int nmatched = 0;
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126
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127 while ((ca = *arg++) != '\0') {
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128 if ((ck = *keyword++) == '\0')
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129 return FALSE; /* arg longer than keyword, no good */
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130 if (isupper(ca)) /* force arg to lcase (assume ck is already) */
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131 ca = tolower(ca);
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132 if (ca != ck)
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133 return FALSE; /* no good */
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parents:
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134 nmatched++; /* count matched characters */
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135 }
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136 /* reached end of argument; fail if it's too short for unique abbrev */
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137 if (nmatched < minchars)
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138 return FALSE;
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139 return TRUE; /* A-OK */
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140 }
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141
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142
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143 /*
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144 * Routines to establish binary I/O mode for stdin and stdout.
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145 * Non-Unix systems often require some hacking to get out of text mode.
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146 */
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147
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148 GLOBAL(FILE *)
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149 read_stdin (void)
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150 {
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151 FILE * input_file = stdin;
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152
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153 #ifdef USE_SETMODE /* need to hack file mode? */
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154 setmode(fileno(stdin), O_BINARY);
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155 #endif
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156 #ifdef USE_FDOPEN /* need to re-open in binary mode? */
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157 if ((input_file = fdopen(fileno(stdin), READ_BINARY)) == NULL) {
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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parents:
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158 fprintf(stderr, "Cannot reopen stdin\n");
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parents:
diff changeset
159 exit(EXIT_FAILURE);
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160 }
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diff changeset
161 #endif
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parents:
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162 return input_file;
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163 }
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164
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165
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diff changeset
166 GLOBAL(FILE *)
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diff changeset
167 write_stdout (void)
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diff changeset
168 {
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diff changeset
169 FILE * output_file = stdout;
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170
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parents:
diff changeset
171 #ifdef USE_SETMODE /* need to hack file mode? */
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parents:
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172 setmode(fileno(stdout), O_BINARY);
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diff changeset
173 #endif
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parents:
diff changeset
174 #ifdef USE_FDOPEN /* need to re-open in binary mode? */
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parents:
diff changeset
175 if ((output_file = fdopen(fileno(stdout), WRITE_BINARY)) == NULL) {
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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parents:
diff changeset
176 fprintf(stderr, "Cannot reopen stdout\n");
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parents:
diff changeset
177 exit(EXIT_FAILURE);
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178 }
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diff changeset
179 #endif
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diff changeset
180 return output_file;
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diff changeset
181 }