barrier/lib/base/CLog.cpp

302 lines
6.8 KiB
C++

/*
* synergy -- mouse and keyboard sharing utility
* Copyright (C) 2002 Chris Schoeneman
*
* This package is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* found in the file COPYING that should have accompanied this file.
*
* This package is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include "CLog.h"
#include "CString.h"
#include "CStringUtil.h"
#include "LogOutputters.h"
#include "CArch.h"
#include "Version.h"
#include <cstdio>
#include <cstring>
#include <iostream>
#include <ctime>
// names of priorities
static const char* g_priority[] = {
"FATAL",
"ERROR",
"WARNING",
"NOTE",
"INFO",
"DEBUG",
"DEBUG1",
"DEBUG2",
"DEBUG3",
"DEBUG4",
"DEBUG5"
};
// number of priorities
static const int g_numPriority = (int)(sizeof(g_priority) / sizeof(g_priority[0]));
// the default priority
#if defined(NDEBUG)
static const int g_defaultMaxPriority = 4;
#else
static const int g_defaultMaxPriority = 5;
#endif
// length of longest string in g_priority
static const int g_maxPriorityLength = 7;
// length of suffix string (": ")
static const int g_prioritySuffixLength = 2;
// amount of padded required to fill in the priority prefix
static const int g_priorityPad = g_maxPriorityLength +
g_prioritySuffixLength;
//
// CLog
//
CLog* CLog::s_log = NULL;
CLog::CLog()
{
assert(s_log == NULL);
// create mutex for multithread safe operation
m_mutex = ARCH->newMutex();
// other initalization
m_maxPriority = g_defaultMaxPriority;
m_maxNewlineLength = 0;
insert(new CConsoleLogOutputter);
}
CLog::~CLog()
{
// clean up
for (COutputterList::iterator index = m_outputters.begin();
index != m_outputters.end(); ++index) {
delete *index;
}
for (COutputterList::iterator index = m_alwaysOutputters.begin();
index != m_alwaysOutputters.end(); ++index) {
delete *index;
}
ARCH->closeMutex(m_mutex);
s_log = NULL;
}
CLog*
CLog::getInstance()
{
// note -- not thread safe; client must initialize log safely
if (s_log == NULL) {
s_log = new CLog;
}
return s_log;
}
const char*
CLog::getFilterName() const
{
return getFilterName(getFilter());
}
const char*
CLog::getFilterName(int level) const
{
return g_priority[level];
}
void
CLog::print(const char* file, int line, const char* fmt, ...)
{
// check if fmt begins with a priority argument
ELevel priority = kINFO;
if (fmt[0] == '%' && fmt[1] == 'z') {
// 060 in octal is 0 (48 in decimal), so subtracting this converts ascii
// number it a true number. we could use atoi instead, but this is how
// it was done originally.
priority = (ELevel)(fmt[2] - '\060'); // TODO: fix this shit
// move the pointer on past the debug priority char
fmt += 3;
}
// done if below priority threshold
if (priority > getFilter()) {
return;
}
// compute prefix padding length
char stack[1024];
// compute suffix padding length
int sPad = m_maxNewlineLength;
// print to buffer, leaving space for a newline at the end and prefix
// at the beginning.
char* buffer = stack;
int len = (int)(sizeof(stack) / sizeof(stack[0]));
while (true) {
// try printing into the buffer
va_list args;
va_start(args, fmt);
int n = ARCH->vsnprintf(buffer, len - sPad, fmt, args);
va_end(args);
// if the buffer wasn't big enough then make it bigger and try again
if (n < 0 || n > (int)len) {
if (buffer != stack) {
delete[] buffer;
}
len *= 2;
buffer = new char[len];
}
// if the buffer was big enough then continue
else {
break;
}
}
// print the prefix to the buffer. leave space for priority label.
// do not prefix time and file for kPRINT (CLOG_PRINT)
if ((file != NULL) && (priority != kPRINT)) {
char message[2048];
struct tm *tm;
char tmp[220];
time_t t;
time(&t);
tm = localtime(&t);
sprintf(tmp, "%04i-%02i-%02iT%02i:%02i:%02i", tm->tm_year + 1900, tm->tm_mon+1, tm->tm_mday, tm->tm_hour, tm->tm_min, tm->tm_sec);
//strcpy(msg, tmp);
sprintf(message, "%s %s: %s\n\t%s,%d", tmp, g_priority[priority], buffer, file, line);
// buffer[pPad - 1] = ' ';
// discard file and line if priority < 0
/*if (priority < 0) {
message += pPad - g_priorityPad;
}
*/
// output buffer
output(priority, message);
} else {
output(priority, buffer);
}
// clean up
if (buffer != stack) {
delete[] buffer;
}
}
void
CLog::insert(ILogOutputter* outputter, bool alwaysAtHead)
{
assert(outputter != NULL);
CArchMutexLock lock(m_mutex);
if (alwaysAtHead) {
m_alwaysOutputters.push_front(outputter);
}
else {
m_outputters.push_front(outputter);
}
outputter->open(kAppVersion);
// Issue 41
// don't show log unless user requests it, as some users find this
// feature irritating (i.e. when they lose network connectivity).
// in windows the log window can be displayed by selecting "show log"
// from the synergy system tray icon.
// if this causes problems for other architectures, then a different
// work around should be attempted.
//outputter->show(false);
}
void
CLog::remove(ILogOutputter* outputter)
{
CArchMutexLock lock(m_mutex);
m_outputters.remove(outputter);
m_alwaysOutputters.remove(outputter);
}
void
CLog::pop_front(bool alwaysAtHead)
{
CArchMutexLock lock(m_mutex);
COutputterList* list = alwaysAtHead ? &m_alwaysOutputters : &m_outputters;
if (!list->empty()) {
delete list->front();
list->pop_front();
}
}
bool
CLog::setFilter(const char* maxPriority)
{
if (maxPriority != NULL) {
for (int i = 0; i < g_numPriority; ++i) {
if (strcmp(maxPriority, g_priority[i]) == 0) {
setFilter(i);
return true;
}
}
return false;
}
return true;
}
void
CLog::setFilter(int maxPriority)
{
CArchMutexLock lock(m_mutex);
m_maxPriority = maxPriority;
}
int
CLog::getFilter() const
{
CArchMutexLock lock(m_mutex);
return m_maxPriority;
}
void
CLog::output(ELevel priority, char* msg)
{
assert(priority >= -1 && priority < g_numPriority);
assert(msg != NULL);
if (!msg) return;
CArchMutexLock lock(m_mutex);
COutputterList::const_iterator i;
for (i = m_alwaysOutputters.begin(); i != m_alwaysOutputters.end(); ++i) {
// write to outputter
(*i)->write(priority, msg);
}
for (i = m_outputters.begin(); i != m_outputters.end(); ++i) {
// write to outputter and break out of loop if it returns false
if (!(*i)->write(priority, msg)) {
break;
}
}
}