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//
// Copyright (c) 2010-2012 Linaro Limited
//
// All rights reserved. This program and the accompanying materials
// are made available under the terms of the MIT License which accompanies
// this distribution, and is available at
// http://www.opensource.org/licenses/mit-license.php
//
// Contributors:
// Alexandros Frantzis <alexandros.frantzis@linaro.org>
// Jesse Barker <jesse.barker@linaro.org>
//
#include <cstdio>
#include <cstdarg>
#include <string>
#include <sstream>
#include <iostream>
#include "log.h"
#ifdef ANDROID
#include <android/log.h>
#endif
using std::string;
const string Log::continuation_prefix("\x10");
string Log::appname_;
bool Log::do_debug_(false);
#ifndef ANDROID
static const string terminal_color_normal("\033[0m");
static const string terminal_color_red("\033[1;31m");
static const string terminal_color_cyan("\033[36m");
static const string terminal_color_yellow("\033[33m");
static const string empty;
static void
print_prefixed_message(std::ostream& stream, const string& color, const string& prefix,
const string& fmt, va_list ap)
{
va_list aq;
/* Estimate message size */
va_copy(aq, ap);
int msg_size = vsnprintf(NULL, 0, fmt.c_str(), aq);
va_end(aq);
/* Create the buffer to hold the message */
char *buf = new char[msg_size + 1];
/* Store the message in the buffer */
va_copy(aq, ap);
vsnprintf(buf, msg_size + 1, fmt.c_str(), aq);
va_end(aq);
/*
* Print the message lines prefixed with the supplied prefix.
* If the target stream is a terminal make the prefix colored.
*/
string linePrefix;
if (!prefix.empty())
{
static const string colon(": ");
string start_color;
string end_color;
if (!color.empty())
{
start_color = color;
end_color = terminal_color_normal;
}
linePrefix = start_color + prefix + end_color + colon;
}
std::string line;
std::stringstream ss(buf);
while(std::getline(ss, line)) {
/*
* If this line is a continuation of a previous log message
* just print the line plainly.
*/
if (line[0] == Log::continuation_prefix[0]) {
stream << line.c_str() + 1;
}
else {
/* Normal line, emit the prefix. */
stream << linePrefix << line;
}
/* Only emit a newline if the original message has it. */
if (!(ss.rdstate() & std::stringstream::eofbit))
stream << std::endl;
}
delete[] buf;
}
void
Log::info(const char *fmt, ...)
{
static const string infoprefix("Info");
static const string& infocolor(isatty(fileno(stdout)) ? terminal_color_cyan : empty);
va_list ap;
va_start(ap, fmt);
if (do_debug_)
print_prefixed_message(std::cout, infocolor, infoprefix, fmt, ap);
else
print_prefixed_message(std::cout, empty, empty, fmt, ap);
va_end(ap);
}
void
Log::debug(const char *fmt, ...)
{
static const string dbgprefix("Debug");
static const string& dbgcolor(isatty(fileno(stdout)) ? terminal_color_yellow : empty);
if (!do_debug_)
return;
va_list ap;
va_start(ap, fmt);
print_prefixed_message(std::cout, dbgcolor, dbgprefix, fmt, ap);
va_end(ap);
}
void
Log::error(const char *fmt, ...)
{
static const string errprefix("Error");
static const string& errcolor(isatty(fileno(stderr)) ? terminal_color_red : empty);
va_list ap;
va_start(ap, fmt);
print_prefixed_message(std::cerr, errcolor, errprefix, fmt, ap);
va_end(ap);
}
void
Log::flush()
{
std::cout.flush();
std::cerr.flush();
}
#else
void
Log::info(const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
__android_log_vprint(ANDROID_LOG_INFO, appname_.c_str(), fmt, ap);
va_end(ap);
}
void
Log::debug(const char *fmt, ...)
{
if (!do_debug_)
return;
va_list ap;
va_start(ap, fmt);
__android_log_vprint(ANDROID_LOG_DEBUG, appname_.c_str(), fmt, ap);
va_end(ap);
}
void
Log::error(const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
__android_log_vprint(ANDROID_LOG_ERROR, appname_.c_str(), fmt, ap);
va_end(ap);
}
void
Log::flush()
{
}
#endif
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