iPublicUtility/CAXException.h
/* |
File: CAXException.h |
Abstract: |
Version: 1.2 |
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*/ |
#ifndef __CAXException_h__ |
#define __CAXException_h__ |
#if !defined(__COREAUDIO_USE_FLAT_INCLUDES__) |
#include <CoreFoundation/CoreFoundation.h> |
#else |
#include <ConditionalMacros.h> |
#include <CoreFoundation.h> |
#endif |
#include "CADebugMacros.h" |
#include <ctype.h> |
#include <stdio.h> |
#include <string.h> |
// 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 void Throw(const char *operation, OSStatus err) |
{ |
throw CAXException(operation, err); |
}*/ |
static char *FormatError(char *str, OSStatus error) |
{ |
// see if it appears to be a 4-char-code |
*(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 |
// no, format it as an integer |
sprintf(str, "%d", (int)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) { \ |
char __buf[12]; \ |
DebugMessageN2("error %s: %s\n", CAXException::FormatError(__buf, __err), operation);\ |
STOP; \ |
throw CAXException(operation, __err); \ |
} \ |
} while (0) |
#define XThrowIf(condition, error, operation) \ |
do { \ |
if (condition) { \ |
OSStatus __err = error; \ |
char __buf[12]; \ |
DebugMessageN2("error %s: %s\n", CAXException::FormatError(__buf, __err), operation);\ |
STOP; \ |
throw CAXException(operation, __err); \ |
} \ |
} while (0) |
#define XRequireNoError(error, label) \ |
do { \ |
OSStatus __err = error; \ |
if (__err) { \ |
char __buf[12]; \ |
DebugMessageN2("error %s: %s\n", CAXException::FormatError(__buf, __err), #error);\ |
STOP; \ |
goto label; \ |
} \ |
} while (0) |
#define XAssertNoError(error) \ |
do { \ |
OSStatus __err = error; \ |
if (__err) { \ |
char __buf[12]; \ |
DebugMessageN2("error %s: %s\n", CAXException::FormatError(__buf, __err), #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 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__ |
Copyright © 2010 Apple Inc. All Rights Reserved. Terms of Use | Privacy Policy | Updated: 2010-06-28