/* File: CAXException.h Abstract: Helper class for exception handling Version: 2.4 Disclaimer: IMPORTANT: This Apple software is supplied to you by Apple Inc. ("Apple") in consideration of your agreement to the following terms, and your use, installation, modification or redistribution of this Apple software constitutes acceptance of these terms. If you do not agree with these terms, please do not use, install, modify or redistribute this Apple software. 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All Rights Reserved. */ #ifdef USE_TI_MEDIA #ifndef __CAXException_h__ #define __CAXException_h__ #if !defined(__COREAUDIO_USE_FLAT_INCLUDES__) #include #else #include #include #endif #include "CADebugMacros.h" #include #include #include class CAX4CCString { public: CAX4CCString(OSStatus error) { // see if it appears to be a 4-char-code char *str = mStr; *(UInt32 *)(str + 1) = CFSwapInt32HostToBig(error); if (isprint(str[1]) && isprint(str[2]) && isprint(str[3]) && isprint(str[4])) { str[0] = str[5] = '\''; str[6] = '\0'; } else if (error > -200000 && error < 200000) // no, format it as an integer sprintf(str, "%d", (int)error); else sprintf(str, "0x%x", (int)error); } const char *get() const { return mStr; } operator const char *() const { return mStr; } private: char mStr[16]; }; // An extended exception class that includes the name of the failed operation class CAXException { public: CAXException(const char *operation, OSStatus err) : mError(err) { if (operation == NULL) mOperation[0] = '\0'; else if (strlen(operation) >= sizeof(mOperation)) { memcpy(mOperation, operation, sizeof(mOperation) - 1); mOperation[sizeof(mOperation) - 1] = '\0'; } else strcpy(mOperation, operation); } char *FormatError(char *str) const { return FormatError(str, mError); } char mOperation[256]; const OSStatus mError; // ------------------------------------------------- typedef void (*WarningHandler)(const char *msg, OSStatus err); static char *FormatError(char *str, OSStatus error) { strcpy(str, CAX4CCString(error)); return str; } static void Warning(const char *s, OSStatus error) { if (sWarningHandler) (*sWarningHandler)(s, error); } static void SetWarningHandler(WarningHandler f) { sWarningHandler = f; } private: static WarningHandler sWarningHandler; }; #if DEBUG || CoreAudio_Debug #define XThrowIfError(error, operation) \ do { \ OSStatus __err = error; \ if (__err) { \ DebugMessageN2("about to throw %s: %s", CAX4CCString(error).get(), operation);\ STOP; \ throw CAXException(operation, __err); \ } \ } while (0) #define XThrowIf(condition, error, operation) \ do { \ if (condition) { \ OSStatus __err = error; \ DebugMessageN2("about to throw %s: %s", CAX4CCString(error).get(), operation);\ STOP; \ throw CAXException(operation, __err); \ } \ } while (0) #define XRequireNoError(error, label) \ do { \ OSStatus __err = error; \ if (__err) { \ DebugMessageN2("about to throw %s: %s", CAX4CCString(error).get(), #error);\ STOP; \ goto label; \ } \ } while (0) #define XAssert(assertion) \ do { \ if (!(assertion)) { \ DebugMessageN1("error: failed assertion: %s", #assertion);\ STOP; \ } \ } while (0) #define XAssertNoError(error) \ do { \ OSStatus __err = error; \ if (__err) { \ DebugMessageN2("error %s: %s", CAX4CCString(error).get(), #error);\ STOP; \ } \ } while (0) #else #define XThrowIfError(error, operation) \ do { \ OSStatus __err = error; \ if (__err) { \ throw CAXException(operation, __err); \ } \ } while (0) #define XThrowIf(condition, error, operation) \ do { \ if (condition) { \ OSStatus __err = error; \ throw CAXException(operation, __err); \ } \ } while (0) #define XRequireNoError(error, label) \ do { \ OSStatus __err = error; \ if (__err) { \ goto label; \ } \ } while (0) #define XAssert(assertion) \ do { \ } while (0) #define XAssertNoError(error) \ do { \ /*OSStatus __err =*/ error; \ } while (0) #endif #define XThrow(error, operation) XThrowIf(true, error, operation) #define XThrowIfErr(error) XThrowIfError(error, #error) #endif // __CAXException_h__ #endif