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) 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) 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) 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) 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 *) 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 *) 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