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| 1 /* | |
| 2 * jerror.c | |
| 3 * | |
| 4 * Copyright (C) 1991-1998, 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 simple error-reporting and trace-message routines. | |
| 9 * These are suitable for Unix-like systems and others where writing to | |
| 10 * stderr is the right thing to do. Many applications will want to replace | |
| 11 * some or all of these routines. | |
| 12 * | |
| 13 * If you define USE_WINDOWS_MESSAGEBOX in jconfig.h or in the makefile, | |
| 14 * you get a Windows-specific hack to display error messages in a dialog box. | |
| 15 * It ain't much, but it beats dropping error messages into the bit bucket, | |
| 16 * which is what happens to output to stderr under most Windows C compilers. | |
| 17 * | |
| 18 * These routines are used by both the compression and decompression code. | |
| 19 */ | |
| 20 | |
| 21 /* this is not a core library module, so it doesn't define JPEG_INTERNALS */ | |
| 22 #include "jinclude.h" | |
| 23 #include "jpeglib.h" | |
| 24 #include "jversion.h" | |
| 25 #include "jerror.h" | |
| 26 | |
| 27 #ifdef USE_WINDOWS_MESSAGEBOX | |
| 28 #include <windows.h> | |
| 29 #endif | |
| 30 | |
| 31 #ifndef EXIT_FAILURE /* define exit() codes if not provided */ | |
| 32 #define EXIT_FAILURE 1 | |
| 33 #endif | |
| 34 | |
| 35 | |
| 36 /* | |
| 37 * Create the message string table. | |
| 38 * We do this from the master message list in jerror.h by re-reading | |
| 39 * jerror.h with a suitable definition for macro JMESSAGE. | |
| 40 * The message table is made an external symbol just in case any applications | |
| 41 * want to refer to it directly. | |
| 42 */ | |
| 43 | |
| 44 #ifdef NEED_SHORT_EXTERNAL_NAMES | |
| 45 #define jpeg_std_message_table jMsgTable | |
| 46 #endif | |
| 47 | |
| 48 #define JMESSAGE(code,string) string , | |
| 49 | |
| 50 const char * const jpeg_std_message_table[] = { | |
| 51 #include "jerror.h" | |
| 52 NULL | |
| 53 }; | |
| 54 | |
| 55 | |
| 56 /* | |
| 57 * Error exit handler: must not return to caller. | |
| 58 * | |
| 59 * Applications may override this if they want to get control back after | |
| 60 * an error. Typically one would longjmp somewhere instead of exiting. | |
| 61 * The setjmp buffer can be made a private field within an expanded error | |
| 62 * handler object. Note that the info needed to generate an error message | |
| 63 * is stored in the error object, so you can generate the message now or | |
| 64 * later, at your convenience. | |
| 65 * You should make sure that the JPEG object is cleaned up (with jpeg_abort | |
| 66 * or jpeg_destroy) at some point. | |
| 67 */ | |
| 68 | |
| 69 METHODDEF(void) | |
| 70 error_exit (j_common_ptr cinfo) | |
| 71 { | |
| 72 /* Always display the message */ | |
| 73 (*cinfo->err->output_message) (cinfo); | |
| 74 | |
| 75 /* Let the memory manager delete any temp files before we die */ | |
| 76 jpeg_destroy(cinfo); | |
| 77 | |
| 78 exit(EXIT_FAILURE); | |
| 79 } | |
| 80 | |
| 81 | |
| 82 /* | |
| 83 * Actual output of an error or trace message. | |
| 84 * Applications may override this method to send JPEG messages somewhere | |
| 85 * other than stderr. | |
| 86 * | |
| 87 * On Windows, printing to stderr is generally completely useless, | |
| 88 * so we provide optional code to produce an error-dialog popup. | |
| 89 * Most Windows applications will still prefer to override this routine, | |
| 90 * but if they don't, it'll do something at least marginally useful. | |
| 91 * | |
| 92 * NOTE: to use the library in an environment that doesn't support the | |
| 93 * C stdio library, you may have to delete the call to fprintf() entirely, | |
| 94 * not just not use this routine. | |
| 95 */ | |
| 96 | |
| 97 METHODDEF(void) | |
| 98 output_message (j_common_ptr cinfo) | |
| 99 { | |
| 100 char buffer[JMSG_LENGTH_MAX]; | |
| 101 | |
| 102 /* Create the message */ | |
| 103 (*cinfo->err->format_message) (cinfo, buffer); | |
| 104 | |
| 105 #ifdef USE_WINDOWS_MESSAGEBOX | |
| 106 /* Display it in a message dialog box */ | |
| 107 MessageBox(GetActiveWindow(), buffer, "JPEG Library Error", | |
| 108 MB_OK | MB_ICONERROR); | |
| 109 #else | |
| 110 /* Send it to stderr, adding a newline */ | |
| 111 fprintf(stderr, "%s\n", buffer); | |
| 112 #endif | |
| 113 } | |
| 114 | |
| 115 | |
| 116 /* | |
| 117 * Decide whether to emit a trace or warning message. | |
| 118 * msg_level is one of: | |
| 119 * -1: recoverable corrupt-data warning, may want to abort. | |
| 120 * 0: important advisory messages (always display to user). | |
| 121 * 1: first level of tracing detail. | |
| 122 * 2,3,...: successively more detailed tracing messages. | |
| 123 * An application might override this method if it wanted to abort on warnings | |
| 124 * or change the policy about which messages to display. | |
| 125 */ | |
| 126 | |
| 127 METHODDEF(void) | |
| 128 emit_message (j_common_ptr cinfo, int msg_level) | |
| 129 { | |
| 130 struct jpeg_error_mgr * err = cinfo->err; | |
| 131 | |
| 132 if (msg_level < 0) { | |
| 133 /* It's a warning message. Since corrupt files may generate many warnings, | |
| 134 * the policy implemented here is to show only the first warning, | |
| 135 * unless trace_level >= 3. | |
| 136 */ | |
| 137 if (err->num_warnings == 0 || err->trace_level >= 3) | |
| 138 (*err->output_message) (cinfo); | |
| 139 /* Always count warnings in num_warnings. */ | |
| 140 err->num_warnings++; | |
| 141 } else { | |
| 142 /* It's a trace message. Show it if trace_level >= msg_level. */ | |
| 143 if (err->trace_level >= msg_level) | |
| 144 (*err->output_message) (cinfo); | |
| 145 } | |
| 146 } | |
| 147 | |
| 148 | |
| 149 /* | |
| 150 * Format a message string for the most recent JPEG error or message. | |
| 151 * The message is stored into buffer, which should be at least JMSG_LENGTH_MAX | |
| 152 * characters. Note that no '\n' character is added to the string. | |
| 153 * Few applications should need to override this method. | |
| 154 */ | |
| 155 | |
| 156 METHODDEF(void) | |
| 157 format_message (j_common_ptr cinfo, char * buffer) | |
| 158 { | |
| 159 struct jpeg_error_mgr * err = cinfo->err; | |
| 160 int msg_code = err->msg_code; | |
| 161 const char * msgtext = NULL; | |
| 162 const char * msgptr; | |
| 163 char ch; | |
| 164 boolean isstring; | |
| 165 | |
| 166 /* Look up message string in proper table */ | |
| 167 if (msg_code > 0 && msg_code <= err->last_jpeg_message) { | |
| 168 msgtext = err->jpeg_message_table[msg_code]; | |
| 169 } else if (err->addon_message_table != NULL && | |
| 170 msg_code >= err->first_addon_message && | |
| 171 msg_code <= err->last_addon_message) { | |
| 172 msgtext = err->addon_message_table[msg_code - err->first_addon_message]; | |
| 173 } | |
| 174 | |
| 175 /* Defend against bogus message number */ | |
| 176 if (msgtext == NULL) { | |
| 177 err->msg_parm.i[0] = msg_code; | |
| 178 msgtext = err->jpeg_message_table[0]; | |
| 179 } | |
| 180 | |
| 181 /* Check for string parameter, as indicated by %s in the message text */ | |
| 182 isstring = FALSE; | |
| 183 msgptr = msgtext; | |
| 184 while ((ch = *msgptr++) != '\0') { | |
| 185 if (ch == '%') { | |
| 186 if (*msgptr == 's') isstring = TRUE; | |
| 187 break; | |
| 188 } | |
| 189 } | |
| 190 | |
| 191 /* Format the message into the passed buffer */ | |
| 192 if (isstring) | |
| 193 sprintf(buffer, msgtext, err->msg_parm.s); | |
| 194 else | |
| 195 sprintf(buffer, msgtext, | |
| 196 err->msg_parm.i[0], err->msg_parm.i[1], | |
| 197 err->msg_parm.i[2], err->msg_parm.i[3], | |
| 198 err->msg_parm.i[4], err->msg_parm.i[5], | |
| 199 err->msg_parm.i[6], err->msg_parm.i[7]); | |
| 200 } | |
| 201 | |
| 202 | |
| 203 /* | |
| 204 * Reset error state variables at start of a new image. | |
| 205 * This is called during compression startup to reset trace/error | |
| 206 * processing to default state, without losing any application-specific | |
| 207 * method pointers. An application might possibly want to override | |
| 208 * this method if it has additional error processing state. | |
| 209 */ | |
| 210 | |
| 211 METHODDEF(void) | |
| 212 reset_error_mgr (j_common_ptr cinfo) | |
| 213 { | |
| 214 cinfo->err->num_warnings = 0; | |
| 215 /* trace_level is not reset since it is an application-supplied parameter */ | |
| 216 cinfo->err->msg_code = 0; /* may be useful as a flag for "no error" */ | |
| 217 } | |
| 218 | |
| 219 | |
| 220 /* | |
| 221 * Fill in the standard error-handling methods in a jpeg_error_mgr object. | |
| 222 * Typical call is: | |
| 223 * struct jpeg_compress_struct cinfo; | |
| 224 * struct jpeg_error_mgr err; | |
| 225 * | |
| 226 * cinfo.err = jpeg_std_error(&err); | |
| 227 * after which the application may override some of the methods. | |
| 228 */ | |
| 229 | |
| 230 GLOBAL(struct jpeg_error_mgr *) | |
| 231 jpeg_std_error (struct jpeg_error_mgr * err) | |
| 232 { | |
| 233 err->error_exit = error_exit; | |
| 234 err->emit_message = emit_message; | |
| 235 err->output_message = output_message; | |
| 236 err->format_message = format_message; | |
| 237 err->reset_error_mgr = reset_error_mgr; | |
| 238 | |
| 239 err->trace_level = 0; /* default = no tracing */ | |
| 240 err->num_warnings = 0; /* no warnings emitted yet */ | |
| 241 err->msg_code = 0; /* may be useful as a flag for "no error" */ | |
| 242 | |
| 243 /* Initialize message table pointers */ | |
| 244 err->jpeg_message_table = jpeg_std_message_table; | |
| 245 err->last_jpeg_message = (int) JMSG_LASTMSGCODE - 1; | |
| 246 | |
| 247 err->addon_message_table = NULL; | |
| 248 err->first_addon_message = 0; /* for safety */ | |
| 249 err->last_addon_message = 0; | |
| 250 | |
| 251 return err; | |
| 252 } | |
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Chromium Code Reviews
Issue 1705523002:
Remove libjpeg and libjpeg_turbo. (Closed)
Base URL: https://github.com/domokit/mojo.git@master