1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/libs/libjpeg/jerror.c	Thu Sep 08 06:28:38 2011 +0300
     1.3 @@ -0,0 +1,252 @@
     1.4 +/*
     1.5 + * jerror.c
     1.6 + *
     1.7 + * Copyright (C) 1991-1998, Thomas G. Lane.
     1.8 + * This file is part of the Independent JPEG Group's software.
     1.9 + * For conditions of distribution and use, see the accompanying README file.
    1.10 + *
    1.11 + * This file contains simple error-reporting and trace-message routines.
    1.12 + * These are suitable for Unix-like systems and others where writing to
    1.13 + * stderr is the right thing to do.  Many applications will want to replace
    1.14 + * some or all of these routines.
    1.15 + *
    1.16 + * If you define USE_WINDOWS_MESSAGEBOX in jconfig.h or in the makefile,
    1.17 + * you get a Windows-specific hack to display error messages in a dialog box.
    1.18 + * It ain't much, but it beats dropping error messages into the bit bucket,
    1.19 + * which is what happens to output to stderr under most Windows C compilers.
    1.20 + *
    1.21 + * These routines are used by both the compression and decompression code.
    1.22 + */
    1.23 +
    1.24 +/* this is not a core library module, so it doesn't define JPEG_INTERNALS */
    1.25 +#include "jinclude.h"
    1.26 +#include "jpeglib.h"
    1.27 +#include "jversion.h"
    1.28 +#include "jerror.h"
    1.29 +
    1.30 +#ifdef USE_WINDOWS_MESSAGEBOX
    1.31 +#include <windows.h>
    1.32 +#endif
    1.33 +
    1.34 +#ifndef EXIT_FAILURE		/* define exit() codes if not provided */
    1.35 +#define EXIT_FAILURE  1
    1.36 +#endif
    1.37 +
    1.38 +
    1.39 +/*
    1.40 + * Create the message string table.
    1.41 + * We do this from the master message list in jerror.h by re-reading
    1.42 + * jerror.h with a suitable definition for macro JMESSAGE.
    1.43 + * The message table is made an external symbol just in case any applications
    1.44 + * want to refer to it directly.
    1.45 + */
    1.46 +
    1.47 +#ifdef NEED_SHORT_EXTERNAL_NAMES
    1.48 +#define jpeg_std_message_table	jMsgTable
    1.49 +#endif
    1.50 +
    1.51 +#define JMESSAGE(code,string)	string ,
    1.52 +
    1.53 +const char * const jpeg_std_message_table[] = {
    1.54 +#include "jerror.h"
    1.55 +  NULL
    1.56 +};
    1.57 +
    1.58 +
    1.59 +/*
    1.60 + * Error exit handler: must not return to caller.
    1.61 + *
    1.62 + * Applications may override this if they want to get control back after
    1.63 + * an error.  Typically one would longjmp somewhere instead of exiting.
    1.64 + * The setjmp buffer can be made a private field within an expanded error
    1.65 + * handler object.  Note that the info needed to generate an error message
    1.66 + * is stored in the error object, so you can generate the message now or
    1.67 + * later, at your convenience.
    1.68 + * You should make sure that the JPEG object is cleaned up (with jpeg_abort
    1.69 + * or jpeg_destroy) at some point.
    1.70 + */
    1.71 +
    1.72 +METHODDEF(void)
    1.73 +error_exit (j_common_ptr cinfo)
    1.74 +{
    1.75 +  /* Always display the message */
    1.76 +  (*cinfo->err->output_message) (cinfo);
    1.77 +
    1.78 +  /* Let the memory manager delete any temp files before we die */
    1.79 +  jpeg_destroy(cinfo);
    1.80 +
    1.81 +  exit(EXIT_FAILURE);
    1.82 +}
    1.83 +
    1.84 +
    1.85 +/*
    1.86 + * Actual output of an error or trace message.
    1.87 + * Applications may override this method to send JPEG messages somewhere
    1.88 + * other than stderr.
    1.89 + *
    1.90 + * On Windows, printing to stderr is generally completely useless,
    1.91 + * so we provide optional code to produce an error-dialog popup.
    1.92 + * Most Windows applications will still prefer to override this routine,
    1.93 + * but if they don't, it'll do something at least marginally useful.
    1.94 + *
    1.95 + * NOTE: to use the library in an environment that doesn't support the
    1.96 + * C stdio library, you may have to delete the call to fprintf() entirely,
    1.97 + * not just not use this routine.
    1.98 + */
    1.99 +
   1.100 +METHODDEF(void)
   1.101 +output_message (j_common_ptr cinfo)
   1.102 +{
   1.103 +  char buffer[JMSG_LENGTH_MAX];
   1.104 +
   1.105 +  /* Create the message */
   1.106 +  (*cinfo->err->format_message) (cinfo, buffer);
   1.107 +
   1.108 +#ifdef USE_WINDOWS_MESSAGEBOX
   1.109 +  /* Display it in a message dialog box */
   1.110 +  MessageBox(GetActiveWindow(), buffer, "JPEG Library Error",
   1.111 +	     MB_OK | MB_ICONERROR);
   1.112 +#else
   1.113 +  /* Send it to stderr, adding a newline */
   1.114 +  fprintf(stderr, "%s\n", buffer);
   1.115 +#endif
   1.116 +}
   1.117 +
   1.118 +
   1.119 +/*
   1.120 + * Decide whether to emit a trace or warning message.
   1.121 + * msg_level is one of:
   1.122 + *   -1: recoverable corrupt-data warning, may want to abort.
   1.123 + *    0: important advisory messages (always display to user).
   1.124 + *    1: first level of tracing detail.
   1.125 + *    2,3,...: successively more detailed tracing messages.
   1.126 + * An application might override this method if it wanted to abort on warnings
   1.127 + * or change the policy about which messages to display.
   1.128 + */
   1.129 +
   1.130 +METHODDEF(void)
   1.131 +emit_message (j_common_ptr cinfo, int msg_level)
   1.132 +{
   1.133 +  struct jpeg_error_mgr * err = cinfo->err;
   1.134 +
   1.135 +  if (msg_level < 0) {
   1.136 +    /* It's a warning message.  Since corrupt files may generate many warnings,
   1.137 +     * the policy implemented here is to show only the first warning,
   1.138 +     * unless trace_level >= 3.
   1.139 +     */
   1.140 +    if (err->num_warnings == 0 || err->trace_level >= 3)
   1.141 +      (*err->output_message) (cinfo);
   1.142 +    /* Always count warnings in num_warnings. */
   1.143 +    err->num_warnings++;
   1.144 +  } else {
   1.145 +    /* It's a trace message.  Show it if trace_level >= msg_level. */
   1.146 +    if (err->trace_level >= msg_level)
   1.147 +      (*err->output_message) (cinfo);
   1.148 +  }
   1.149 +}
   1.150 +
   1.151 +
   1.152 +/*
   1.153 + * Format a message string for the most recent JPEG error or message.
   1.154 + * The message is stored into buffer, which should be at least JMSG_LENGTH_MAX
   1.155 + * characters.  Note that no '\n' character is added to the string.
   1.156 + * Few applications should need to override this method.
   1.157 + */
   1.158 +
   1.159 +METHODDEF(void)
   1.160 +format_message (j_common_ptr cinfo, char * buffer)
   1.161 +{
   1.162 +  struct jpeg_error_mgr * err = cinfo->err;
   1.163 +  int msg_code = err->msg_code;
   1.164 +  const char * msgtext = NULL;
   1.165 +  const char * msgptr;
   1.166 +  char ch;
   1.167 +  boolean isstring;
   1.168 +
   1.169 +  /* Look up message string in proper table */
   1.170 +  if (msg_code > 0 && msg_code <= err->last_jpeg_message) {
   1.171 +    msgtext = err->jpeg_message_table[msg_code];
   1.172 +  } else if (err->addon_message_table != NULL &&
   1.173 +	     msg_code >= err->first_addon_message &&
   1.174 +	     msg_code <= err->last_addon_message) {
   1.175 +    msgtext = err->addon_message_table[msg_code - err->first_addon_message];
   1.176 +  }
   1.177 +
   1.178 +  /* Defend against bogus message number */
   1.179 +  if (msgtext == NULL) {
   1.180 +    err->msg_parm.i[0] = msg_code;
   1.181 +    msgtext = err->jpeg_message_table[0];
   1.182 +  }
   1.183 +
   1.184 +  /* Check for string parameter, as indicated by %s in the message text */
   1.185 +  isstring = FALSE;
   1.186 +  msgptr = msgtext;
   1.187 +  while ((ch = *msgptr++) != '\0') {
   1.188 +    if (ch == '%') {
   1.189 +      if (*msgptr == 's') isstring = TRUE;
   1.190 +      break;
   1.191 +    }
   1.192 +  }
   1.193 +
   1.194 +  /* Format the message into the passed buffer */
   1.195 +  if (isstring)
   1.196 +    sprintf(buffer, msgtext, err->msg_parm.s);
   1.197 +  else
   1.198 +    sprintf(buffer, msgtext,
   1.199 +	    err->msg_parm.i[0], err->msg_parm.i[1],
   1.200 +	    err->msg_parm.i[2], err->msg_parm.i[3],
   1.201 +	    err->msg_parm.i[4], err->msg_parm.i[5],
   1.202 +	    err->msg_parm.i[6], err->msg_parm.i[7]);
   1.203 +}
   1.204 +
   1.205 +
   1.206 +/*
   1.207 + * Reset error state variables at start of a new image.
   1.208 + * This is called during compression startup to reset trace/error
   1.209 + * processing to default state, without losing any application-specific
   1.210 + * method pointers.  An application might possibly want to override
   1.211 + * this method if it has additional error processing state.
   1.212 + */
   1.213 +
   1.214 +METHODDEF(void)
   1.215 +reset_error_mgr (j_common_ptr cinfo)
   1.216 +{
   1.217 +  cinfo->err->num_warnings = 0;
   1.218 +  /* trace_level is not reset since it is an application-supplied parameter */
   1.219 +  cinfo->err->msg_code = 0;	/* may be useful as a flag for "no error" */
   1.220 +}
   1.221 +
   1.222 +
   1.223 +/*
   1.224 + * Fill in the standard error-handling methods in a jpeg_error_mgr object.
   1.225 + * Typical call is:
   1.226 + *	struct jpeg_compress_struct cinfo;
   1.227 + *	struct jpeg_error_mgr err;
   1.228 + *
   1.229 + *	cinfo.err = jpeg_std_error(&err);
   1.230 + * after which the application may override some of the methods.
   1.231 + */
   1.232 +
   1.233 +GLOBAL(struct jpeg_error_mgr *)
   1.234 +jpeg_std_error (struct jpeg_error_mgr * err)
   1.235 +{
   1.236 +  err->error_exit = error_exit;
   1.237 +  err->emit_message = emit_message;
   1.238 +  err->output_message = output_message;
   1.239 +  err->format_message = format_message;
   1.240 +  err->reset_error_mgr = reset_error_mgr;
   1.241 +
   1.242 +  err->trace_level = 0;		/* default = no tracing */
   1.243 +  err->num_warnings = 0;	/* no warnings emitted yet */
   1.244 +  err->msg_code = 0;		/* may be useful as a flag for "no error" */
   1.245 +
   1.246 +  /* Initialize message table pointers */
   1.247 +  err->jpeg_message_table = jpeg_std_message_table;
   1.248 +  err->last_jpeg_message = (int) JMSG_LASTMSGCODE - 1;
   1.249 +
   1.250 +  err->addon_message_table = NULL;
   1.251 +  err->first_addon_message = 0;	/* for safety */
   1.252 +  err->last_addon_message = 0;
   1.253 +
   1.254 +  return err;
   1.255 +}