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#include "stdafx.h"
#include "clog.h"
static FILE *logFile = NULL;
static CPhidgetLog_level logging_level = 0;
/* Protects logFile, logging_level - thread safe */
int logLockInitialized = PFALSE;
CThread_mutex_t logLock;
static const char *
logLevelToStr(CPhidgetLog_level l)
{
switch (l) {
case PHIDGET_LOG_CRITICAL:
return "CRIT";
case PHIDGET_LOG_ERROR:
return "ERR";
case PHIDGET_LOG_WARNING:
return "WARN";
case PHIDGET_LOG_DEBUG:
return "DEBUG";
case PHIDGET_LOG_INFO:
return "INFO";
case PHIDGET_LOG_VERBOSE:
return "VERBOSE";
}
return "???";
}
PHIDGET21_API int CCONV CPhidget_enableLogging(CPhidgetLog_level level, const char *outputFile)
{
if(!logLockInitialized)
{
CThread_mutex_init(&logLock);
logLockInitialized = PTRUE;
}
CThread_mutex_lock(&logLock);
logging_level = level;
if(outputFile == NULL)
logFile = NULL;
else
{
logFile = fopen(outputFile,"a");
#ifndef _WINDOWS
if(!logFile)
{
CThread_mutex_unlock(&logLock);
switch(errno)
{
case EACCES:
LOG(PHIDGET_LOG_WARNING, "Permission denied for specified logfile. Logging to stdout.");
break;
defualt:
LOG(PHIDGET_LOG_WARNING, "Logfile fopen failed with code: %d",errno);
}
CThread_mutex_lock(&logLock);
}
#endif
}
CThread_mutex_unlock(&logLock);
LOG(PHIDGET_LOG_INFO, "Enabling logging");
return EPHIDGET_OK;
}
PHIDGET21_API int CCONV CPhidget_disableLogging()
{
if(!logLockInitialized)
{
CThread_mutex_init(&logLock);
logLockInitialized = PTRUE;
}
LOG(PHIDGET_LOG_INFO, "Disabling logging");
CThread_mutex_lock(&logLock);
if(logFile!=NULL && logFile!=stdout && logFile!=stderr)
fclose(logFile);
logFile = NULL;
logging_level = 0;
CThread_mutex_unlock(&logLock);
return EPHIDGET_OK;
}
//if outputting to a file, it is designed to be CSV compliant
//only print out debug logs in debug library
PHIDGET21_API int CCONV CPhidget_log(CPhidgetLog_level level, const char *msg, const char *fmt, ...)
{
size_t threadID = 0;
int logToStderr = (int)level & LOG_TO_STDERR;
va_list va;
level = level & 0xFF;
#ifdef DEBUG
if(level <= logging_level || level == PHIDGET_LOG_DEBUG || logToStderr)
#else
if((level <= logging_level && level != PHIDGET_LOG_DEBUG) || logToStderr)
#endif
{
if(!logLockInitialized)
{
CThread_mutex_init(&logLock);
logLockInitialized = PTRUE;
}
CThread_mutex_lock(&logLock);
if (!logFile)
logFile = stdout;
#ifdef WINCE
if(logToStderr)
fprintf(stderr, "%s: ",logLevelToStr(level));
else if(logFile==stdout)
fprintf(logFile, "%s: ",logLevelToStr(level));
else
fprintf(logFile, "%d,\"%s\",%s,\"", threadID, msg, logLevelToStr(level));
va_start(va, fmt);
if(logToStderr)
{
vfprintf(stderr, fmt, va);
va_end(va);
fprintf(stderr, "\n");
fflush(stderr);
}
else
{
vfprintf(logFile, fmt, va);
va_end(va);
if(logFile==stdout)
fprintf(logFile, "\n");
else
fprintf(logFile, "\"\n");
fflush(logFile);
}
#else //!WINCE
{
char date[50];
struct tm *tmp;
time_t t;
time(&t);
#ifndef _WINDOWS
struct tm tm;
localtime_r(&t, &tm);
tmp = &tm;
threadID = (size_t)pthread_self();
#else
tmp = localtime(&t);
threadID = (size_t)GetCurrentThreadId();
#endif
if (!strftime(date, sizeof (date), "%c", tmp))
strncpy(date, "?", sizeof (date));
if(logToStderr)
fprintf(stderr, "%s: ",logLevelToStr(level));
else if(logFile==stdout)
fprintf(logFile, "%s: ",logLevelToStr(level));
else
fprintf(logFile, "%s,%d,\"%s\",%s,\"", date, (int)threadID, msg, logLevelToStr(level));
va_start(va, fmt);
if(logToStderr)
{
vfprintf(stderr, fmt, va);
va_end(va);
fprintf(stderr, "\n");
fflush(stderr);
}
else
{
vfprintf(logFile, fmt, va);
va_end(va);
if(logFile==stdout)
fprintf(logFile, "\n");
else
fprintf(logFile, "\"\n");
fflush(logFile);
}
}
#endif
CThread_mutex_unlock(&logLock);
}
return EPHIDGET_OK;
}
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