/*----------------------------------------------------------------------
| NPT_String::Format
+---------------------------------------------------------------------*/
NPT_String
NPT_String::Format(const char* format, ...)
{
NPT_String result;
NPT_Size buffer_size = NPT_STRING_FORMAT_BUFFER_DEFAULT_SIZE; // default value
va_list args;
for(;;) {
/* try to format (it might not fit) */
result.Reserve(buffer_size);
char* buffer = result.UseChars();
va_start(args, format);
int f_result = NPT_FormatStringVN(buffer, buffer_size, format, args);
va_end(args);
if (f_result >= (int)(buffer_size)) f_result = -1;
if (f_result >= 0) {
result.SetLength(f_result);
break;
}
/* the buffer was too small, try something bigger */
/* (we don't trust the return value of NPT_FormatStringVN */
/* for the actual size needed) */
buffer_size *= 2;
if (buffer_size > NPT_STRING_FORMAT_BUFFER_MAX_SIZE) break;
}
return result;
}
/*----------------------------------------------------------------------
| NPT_Logger::Log
+---------------------------------------------------------------------*/
void
NPT_Logger::Log(int level,
const char* source_file,
unsigned int source_line,
const char* source_function,
const char* msg,
...)
{
// this is a no-op if the log manager is disabled
if (!LogManager.IsEnabled()) return;
/* check the log level (in case filtering has not already been done) */
if (level < m_Level) return;
// we need to disable the log manager while someone is logging
NPT_LogManagerAutoDisabler autodisabler;
/* format the message */
char buffer[NPT_LOG_STACK_BUFFER_MAX_SIZE];
NPT_Size buffer_size = sizeof(buffer);
char* message = buffer;
int result;
va_list args;
for(;;) {
/* try to format the message (it might not fit) */
va_start(args, msg);
result = NPT_FormatStringVN(message, buffer_size-1, msg, args);
va_end(args);
if (result >= (int)(buffer_size-1)) result = -1;
message[buffer_size-1] = 0; /* force a NULL termination */
if (result >= 0) break;
/* the buffer was too small, try something bigger */
buffer_size = (buffer_size+NPT_LOG_HEAP_BUFFER_INCREMENT)*2;
if (buffer_size > NPT_LOG_HEAP_BUFFER_MAX_SIZE) break;
if (message != buffer) delete[] message;
message = new char[buffer_size];
if (message == NULL) return;
}
/* the message is formatted, publish it to the handlers */
NPT_LogRecord record;
NPT_Logger* logger = this;
/* setup the log record */
record.m_LoggerName = logger->m_Name,
record.m_Level = level;
record.m_Message = message;
record.m_SourceFile = source_file;
record.m_SourceLine = source_line;
record.m_SourceFunction = source_function;
NPT_System::GetCurrentTimeStamp(record.m_TimeStamp);
record.m_ThreadId = NPT_Thread::GetCurrentThreadId();
/* call all handlers for this logger and parents */
m_Manager.Lock();
while (logger) {
/* call all handlers for the current logger */
for (NPT_List<NPT_LogHandler*>::Iterator i = logger->m_Handlers.GetFirstItem();
i;
++i) {
NPT_LogHandler* handler = *i;
handler->Log(record);
}
/* forward to the parent unless this logger does not forward */
if (logger->m_ForwardToParent) {
logger = logger->m_Parent;
} else {
break;
}
}
m_Manager.Unlock();
/* free anything we may have allocated */
if (message != buffer) delete[] message;
}