// $Id: jpgermgr.cpp 1282 2006-06-09 09:46:49Z alex $ /* @@tag:xara-cn@@ DO NOT MODIFY THIS LINE ================================XARAHEADERSTART=========================== Xara LX, a vector drawing and manipulation program. Copyright (C) 1993-2006 Xara Group Ltd. Copyright on certain contributions may be held in joint with their respective authors. See AUTHORS file for details. LICENSE TO USE AND MODIFY SOFTWARE ---------------------------------- This file is part of Xara LX. Xara LX is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License version 2 as published by the Free Software Foundation. Xara LX and its component source files are distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. 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Xara Group Ltd, Gaddesden Place, Hemel Hempstead, HP2 6EX, UK. http://www.xara.com/ =================================XARAHEADEREND============================ */ // #include "camtypes.h" #include "jpgermgr.h" //#include "errors.h" - in camtypes.h [AUTOMATICALLY REMOVED] //#include "filtrres.h" // for Error strings // Place any IMPLEMENT type statements here //CC_IMPLEMENT_MEMDUMP(CCWobJob, CC_CLASS_MEMDUMP) // We want better memory tracking #define new CAM_DEBUG_NEW // Build a list of error messages for trace purposes #ifdef _DEBUG #define JMESSAGE(code,string,errorclass) string , const char* const MessageTable[] = { #include "jerror.h" NULL }; #else const char* const MessageTable[] = { NULL }; #endif // Build a list of error classes #define JMESSAGE(code,string,errorclass) errorclass , const JPEGErrorManager::ERROR_CLASS ErrorClasses[] = { #include "jerror.h" JPEGErrorManager::ERR_NONE // to terminate the enum }; // Functions follow /******************************************************************************************** > METHODDEF(void) format_message (j_common_ptr cinfo, char * buffer) Author: Colin_Barfoot (Xara Group Ltd) (copied from IJG library) Created: 02/08/96 Purpose: For formatting TRACE strings Notes: From IJG library: Format a message string for the most recent JPEG error or message. The message is stored into buffer, which should be at least JMSG_LENGTH_MAX characters. Note that no '\n' character is added to the string. Few applications should need to override this method. ********************************************************************************************/ METHODDEF(void) format_message (libJPEG::j_common_ptr cinfo, char * buffer) { struct libJPEG::jpeg_error_mgr * err = cinfo->err; INT32 msg_code = err->msg_code; const char * msgtext = NULL; const char * msgptr; char ch; libJPEG::boolean isstring; // Look up message string in proper table if (msg_code > 0 && msg_code <= err->last_jpeg_message) { msgtext = err->jpeg_message_table[msg_code]; } else if (err->addon_message_table != NULL && msg_code >= err->first_addon_message && msg_code <= err->last_addon_message) { msgtext = err->addon_message_table[msg_code - err->first_addon_message]; } // Defend against bogus message number if (msgtext == NULL) { err->msg_parm.i[0] = msg_code; msgtext = err->jpeg_message_table[0]; } // Check for string parameter, as indicated by %s in the message text isstring = FALSE; msgptr = msgtext; while ((ch = *msgptr++) != '\0') { if (ch == '%') { if (*msgptr == 's') isstring = TRUE; break; } } // Format the message into the passed buffer if (isstring) sprintf(buffer, msgtext, err->msg_parm.s); else sprintf(buffer, msgtext, err->msg_parm.i[0], err->msg_parm.i[1], err->msg_parm.i[2], err->msg_parm.i[3], err->msg_parm.i[4], err->msg_parm.i[5], err->msg_parm.i[6], err->msg_parm.i[7]); } /******************************************************************************************** > JPEGErrorManager::JPEGErrorManager() Author: Colin_Barfoot (Xara Group Ltd) Created: 02/08/96 Purpose: Default constructor for the JPEGErrorManager providing callbacks for error handling in the IJG JPEG Library. By default no exceptions will be thrown. ********************************************************************************************/ JPEGErrorManager::JPEGErrorManager() { m_errmgr.error_exit = ErrorExit; m_errmgr.emit_message = EmitMessage; m_errmgr.output_message = OutputMessage; m_errmgr.format_message = ::format_message; m_errmgr.reset_error_mgr = ResetErrorManager; m_errmgr.trace_level = 0; /* default = no tracing */ m_errmgr.num_warnings = 0; /* no warnings emitted yet */ m_errmgr.msg_code = 0; // may be useful as a flag for "no error" */ /* Initialize message table pointers */ m_errmgr.jpeg_message_table = ::MessageTable; m_errmgr.last_jpeg_message = (INT32) JMSG_LASTMSGCODE - 1; m_errmgr.addon_message_table = NULL; m_errmgr.first_addon_message = 0; /* for safety */ m_errmgr.last_addon_message = 0; // ERROR_CLASS m_ErrorClass = ERR_NONE; } /******************************************************************************************** > J_MESSAGE_CODE JPEGErrorManager::GetLastError() const Author: Colin_Barfoot (Xara Group Ltd) Created: 02/08/96 Returns: Retrieves the last error code Errors: ERROR3 if invalid last error Purpose: Used internally for easy access ********************************************************************************************/ J_MESSAGE_CODE JPEGErrorManager::GetLastError() const { if (m_errmgr.msg_code <= 0 || m_errmgr.msg_code > m_errmgr.last_jpeg_message) { ERROR3(m_errmgr.jpeg_message_table[JMSG_NOMESSAGE]); return JMSG_NOMESSAGE; } return (J_MESSAGE_CODE) m_errmgr.msg_code; } /******************************************************************************************** > StringID JPEGErrorManager::GetStringIDForError() const Author: Colin_Barfoot (Xara Group Ltd) Created: 02/08/96 Returns: A resource StringID for the last error thrown. Purpose: Allows class users to obtain a resource string id suitable for reporting to the user (usually via Error::SetError(...)) ********************************************************************************************/ StringID JPEGErrorManager::GetStringIDForError() const { ERROR_CLASS lastClass = GetLastErrorClass(); if (lastClass == ERR_STANDARD) { return m_MessageID; } else { switch (lastClass) { case ERR_NONE: return (StringID)-1; break; case ERR_STANDARD: return 0; break; // should never happen case ERR_TRACE: return 1; break; // what's this for? case ERR_STRUCTURE: return(_R(IDS_JPEG_ERROR_STRUCTURE)); break; case ERR_FORMAT: return(_R(IDS_JPEG_ERROR_FORMAT)); break; case ERR_LIMITS: return(_R(IDS_JPEG_ERROR_LIMITS)); break; case ERR_UNSUPPORTED: return(_R(IDS_JPEG_ERROR_UNSUPPORTED)); break; default: return(_R(IDS_JPEG_ERROR_INTERNAL)); } } } /******************************************************************************************** > void JPEGErrorManager::ThrowError(StringID UserErrorMessage) Author: Colin_Barfoot (Xara Group Ltd) Created: 02/08/96 Inputs: UserErrorMessage : A resource ID for a string to be used when reporting this error to the user. Purpose: Classes external to the IJG Library should use this entry point to throw exceptions. ********************************************************************************************/ void JPEGErrorManager::ThrowError(StringID UserErrorMessage) { m_ErrorClass = ERR_STANDARD; m_MessageID = UserErrorMessage; throw 0; } /******************************************************************************************** > JPEGErrorManager::ERROR_CLASS JPEGErrorManager::GetLastErrorClass() const Author: Colin_Barfoot (Xara Group Ltd) Created: 02/08/96 Returns: The error class of the last error thrown via a call to ErrorExit or ThrowError Errors: ERROR3 if class is ERR_NONE or ERR_TRACE Purpose: Used internally to provide easy access to m_ErrorClass ********************************************************************************************/ JPEGErrorManager::ERROR_CLASS JPEGErrorManager::GetLastErrorClass() const { if (m_ErrorClass == ERR_NONE || m_ErrorClass == ERR_TRACE) { ERROR3("JPEGErrorManager::GetLastErrorClass() - Trying to get dummy error class"); return ERR_INTERNAL; } return m_ErrorClass; } /******************************************************************************************** > void JPEGErrorManager::ErrorExit(j_common_ptr cinfo) Author: Colin_Barfoot (Xara Group Ltd) Created: 02/08/96 Purpose: The IJG library requires a callback to exit once an error has occurred. This is that callback. It throws an exception. ********************************************************************************************/ void JPEGErrorManager::ErrorExit(libJPEG::j_common_ptr cinfo) { JPEGErrorManager* pThis = (JPEGErrorManager*)cinfo->err; J_MESSAGE_CODE msg = pThis->GetLastError(); pThis->m_ErrorClass = ErrorClasses[msg]; #ifdef _DEBUG EmitMessage(cinfo, -1); #endif throw 0; } /******************************************************************************************** > void JPEGImportFilter::OutputMessage(j_common_ptr cinfo) Author: Colin_Barfoot (Xara Group Ltd) Created: 02/08/96 Purpose: Actual output of an error or trace message. Overrides standard implementation of sending errors to stderr. ********************************************************************************************/ void JPEGErrorManager::OutputMessage(libJPEG::j_common_ptr cinfo) { char buffer[JMSG_LENGTH_MAX]; /* Create the message */ (*cinfo->err->format_message) (cinfo, buffer); /* Send it to stderr, adding a newline */ TRACE( _T("%s\n"), buffer ); } /******************************************************************************************** > void JPEGImportFilter::EmitMessage(j_common_ptr cinfo, INT32 msg_level) Author: Colin_Barfoot (Xara Group Ltd) (based on IJG emit_message) Created: 02/08/96 Purpose: Decide whether to emit a trace or warning message. Notes: msg_level is one of: -1: recoverable corrupt-data warning, may want to abort. 0: important advisory messages (always display to user). 1: first level of tracing detail. 2,3,...: successively more detailed tracing messages. ********************************************************************************************/ void JPEGErrorManager::EmitMessage(libJPEG::j_common_ptr cinfo, INT32 msg_level) { JPEGErrorManager* pThis = (JPEGErrorManager*)cinfo->err; if (msg_level < 0) { /* * It's a warning message. Since corrupt files may generate many warnings, * the policy implemented here is to show only the first warning, * unless trace_level >= 3. */ if (pThis->m_errmgr.num_warnings == 0 || pThis->m_errmgr.trace_level >= 3) { (*pThis->m_errmgr.output_message) (cinfo); } // Always count warnings in num_warnings. pThis->m_errmgr.num_warnings++; } else { // It's a trace message. Show it if trace_level >= msg_level. if (pThis->m_errmgr.trace_level >= msg_level) { (*pThis->m_errmgr.output_message) (cinfo); } } } /******************************************************************************************** > void JPEGErrorManager::ResetErrorManager(j_common_ptr cinfo) Author: Colin_Barfoot (Xara Group Ltd) (based on IJG emit_message) Created: 02/08/96 Purpose: Resets the the error manager prior to starting the filter proper ********************************************************************************************/ void JPEGErrorManager::ResetErrorManager(libJPEG::j_common_ptr cinfo) { JPEGErrorManager* pThis = (JPEGErrorManager*)cinfo->err; pThis->m_errmgr.num_warnings = 0; /* trace_level is not reset since it is an application-supplied parameter */ pThis->m_errmgr.msg_code = 0; /* may be useful as a flag for "no error" */ }