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Switching to a stream-based interface for logging.

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This commit is contained in:
Daviw Williams 2013-05-22 14:21:50 +02:00
parent db1c2bf0f8
commit f3b0183013
2 changed files with 52 additions and 123 deletions
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55
library/PolyVoxCore/include/PolyVoxCore/Impl/ErrorHandling.h
View File

@ -62,36 +62,19 @@ freely, subject to the following restrictions:
* PolyVox provides basic logging facilities which can be redirected by your application.
*/
#define LOG_DECLARATION(name) \
std::ostream& log(name)(void); \
void set(name)Stream(std::ostream& nameStream);
namespace PolyVox
{
class LogLevels
{
public:
enum LogLevel
{
Debug,
Info,
Warning,
Error,
Fatal
};
};
typedef LogLevels::LogLevel LogLevel;
std::ostream& logError(void);
std::ostream& logFatal(void);
typedef void (*LogHandler)(const std::string& message, LogLevel logLevel);
LogHandler getLogHandler();
void setLogHandler(LogHandler newHandler);
// The actual logging function
void log(const std::string& message, LogLevel logLevel);
// Some handy wrappers
void logDebug (const std::string& message);
void logInfo (const std::string& message);
void logWarning(const std::string& message);
void logError (const std::string& message);
void logFatal (const std::string& message);
// These take pointers rather than references to emphasise that the
// user needs to keep the target alive as long as PolyVox is writing data.
void setErrorStream(std::ostream* errorStream);
void setFatalStream(std::ostream* fatalStream);
}
/*
@ -114,14 +97,12 @@ namespace PolyVox
{ \
if (!(condition)) \
{ \
std::stringstream ss; \
ss << std::endl << std::endl; \
ss << " PolyVox Assertion Failed!" << std::endl; \
ss << " =========================" << std::endl; \
ss << " Condition: " << #condition << std::endl; \
ss << " Message: " << (message) << std::endl; \
ss << " Location: " << "Line " << __LINE__ << " of " << __FILE__ << std::endl << std::endl; \
PolyVox::logFatal(ss.str()); \
logFatal() << std::endl << std::endl; \
logFatal() << " PolyVox Assertion Failed!" << std::endl; \
logFatal() << " =========================" << std::endl; \
logFatal() << " Condition: " << #condition << std::endl; \
logFatal() << " Message: " << (message) << std::endl; \
logFatal() << " Location: " << "Line " << __LINE__ << " of " << __FILE__ << std::endl << std::endl; \
POLYVOX_HALT(); \
} \
} while(0) \
@ -176,7 +157,7 @@ namespace PolyVox
*/
#ifdef POLYVOX_THROW_ENABLED
#define POLYVOX_THROW(type, message) \
PolyVox::logError(message); \
logError() << (message); \
throw type((message))
#else
namespace PolyVox
@ -188,7 +169,7 @@ namespace PolyVox
}
#define POLYVOX_THROW(type, message) \
PolyVox::logError(message); \
logError() << (message); \
type except = (type)((message)); \
getThrowHandler()((except), __FILE__, __LINE__)
#endif

120
library/PolyVoxCore/source/Impl/ErrorHandling.cpp
View File

@ -25,115 +25,63 @@ freely, subject to the following restrictions:
namespace PolyVox
{
void defaultLogHandler(const std::string& message, LogLevel logLevel)
// Error stream for logging
std::ostream*& getErrorStreamInstance()
{
switch(logLevel)
{
case LogLevels::Debug:
{
// Debug messages are not output by this default log handler.
// Provide a custom handler if you want to process them.
break;
}
case LogLevels::Info:
{
std::cout << "Info: " << message.c_str() << std::endl;
break;
}
case LogLevels::Warning:
{
std::cerr << "Warning: " << message.c_str() << std::endl;
break;
}
case LogLevels::Error:
{
std::cerr << "Error: " << message.c_str() << std::endl;
break;
}
case LogLevels::Fatal:
{
std::cerr << "Fatal: " << message.c_str() << std::endl;
break;
}
}
static std::ostream* s_pErrorStream = &(std::cerr);
return s_pErrorStream;
}
LogHandler& getLogHandlerInstance()
void setErrorStream(std::ostream* errorStream)
{
static LogHandler s_fLogHandler = &defaultLogHandler;
return s_fLogHandler;
getErrorStreamInstance() = errorStream;
}
LogHandler getLogHandler()
std::ostream& logError(void)
{
return getLogHandlerInstance();
return *(getErrorStreamInstance());
}
void setLogHandler(LogHandler fNewHandler)
// Fatal stream for logging
std::ostream*& getFatalStreamInstance()
{
getLogHandlerInstance() = fNewHandler;
static std::ostream* s_pFatalStream = &(std::cerr);
return s_pFatalStream;
}
void log(const std::string& message, LogLevel logLevel)
void setFatalStream(std::ostream* fatalStream)
{
LogHandler logHandler = getLogHandler();
if(logHandler)
{
logHandler(message, logLevel);
}
getFatalStreamInstance() = fatalStream;
}
// Some handy wrappers
void logDebug(const std::string& message)
{
log(message, LogLevels::Debug );
}
void logInfo(const std::string& message)
std::ostream& logFatal(void)
{
log(message, LogLevels::Info);
}
void logWarning(const std::string& message)
{
log(message, LogLevels::Warning);
}
void logError(const std::string& message)
{
log(message, LogLevels::Error);
}
void logFatal(const std::string& message)
{
log(message, LogLevels::Fatal);
return *(getFatalStreamInstance());
}
#ifndef POLYVOX_THROW_ENABLED
void defaultThrowHandler(std::exception& e, const char* file, int line)
{
std::stringstream ss; \
ss << std::endl << std::endl; \
ss << " PolyVox exception thrown!" << std::endl; \
ss << " =========================" << std::endl; \
ss << " PolyVox has tried to throw an exception but it was built without support" << std::endl; \
ss << " for exceptions. In this scenario PolyVox will call a 'throw handler'" << std::endl; \
ss << " and this message is being printed by the default throw handler." << std::endl << std::endl; \
logFatal() << std::endl << std::endl; \
logFatal() << " PolyVox exception thrown!" << std::endl; \
logFatal() << " =========================" << std::endl; \
logFatal() << " PolyVox has tried to throw an exception but it was built without support" << std::endl; \
logFatal() << " for exceptions. In this scenario PolyVox will call a 'throw handler'" << std::endl; \
logFatal() << " and this message is being printed by the default throw handler." << std::endl << std::endl; \
ss << " If you don't want to enable exceptions then you should try to determine why" << std::endl; \
ss << " this exception was thrown and make sure it doesn't happen again. If it was" << std::endl; \
ss << " due to something like an invalid argument to a function then you should be" << std::endl; \
ss << " able to fix it quite easily by validating parameters as appropriate. More" << std::endl; \
ss << " complex exception scenarios (out of memory, etc) might be harder to fix and" << std::endl; \
ss << " you should replace this default handler with something which is more" << std::endl; \
ss << " meaningful to your users." << std::endl << std::endl; \
logFatal() << " If you don't want to enable exceptions then you should try to determine why" << std::endl; \
logFatal() << " this exception was thrown and make sure it doesn't happen again. If it was" << std::endl; \
logFatal() << " due to something like an invalid argument to a function then you should be" << std::endl; \
logFatal() << " able to fix it quite easily by validating parameters as appropriate. More" << std::endl; \
logFatal() << " complex exception scenarios (out of memory, etc) might be harder to fix and" << std::endl; \
logFatal() << " you should replace this default handler with something which is more" << std::endl; \
logFatal() << " meaningful to your users." << std::endl << std::endl; \
ss << " Exception details" << std::endl; \
ss << " -----------------" << std::endl; \
ss << " Line: " << line << std::endl; \
ss << " File: " << file << std::endl; \
ss << " Message: " << e.what() << std::endl << std::endl; \
PolyVox::logFatal(ss.str()); \
logFatal() << " Exception details" << std::endl; \
logFatal() << " -----------------" << std::endl; \
logFatal() << " Line: " << line << std::endl; \
logFatal() << " File: " << file << std::endl; \
logFatal() << " Message: " << e.what() << std::endl << std::endl; \
POLYVOX_HALT(); \
}