cpp/src/qpid/log/Statement.cpp

/*
 *
 * Copyright (c) 2006 The Apache Software Foundation
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 */

#include "qpid/log/Statement.h"
#include "qpid/log/Logger.h"
#include <boost/bind.hpp>
#include <stdexcept>
#include <algorithm>
#include <ctype.h>

namespace qpid {
namespace log {

namespace {
struct NonPrint { bool operator()(unsigned char c) { return !isprint(c) && !isspace(c); } };

const char hex[] = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F' };

std::string quote(const std::string& str) {
    NonPrint nonPrint;
    size_t n = std::count_if(str.begin(), str.end(), nonPrint);
    if (n==0) return str;
    std::string ret;
    ret.reserve(str.size()+2*n); // Avoid extra allocations.
    for (std::string::const_iterator i = str.begin(); i != str.end(); ++i) {
        if (nonPrint(*i)) {
            ret.push_back('\\');
            ret.push_back('x');
            ret.push_back(hex[((*i) >> 4)&0xf]);
            ret.push_back(hex[(*i) & 0xf]);
        }
        else ret.push_back(*i);
    }
    return ret;
}
}

void Statement::log(const std::string& message) {
    Logger::instance().log(*this, quote(message));
}

Statement::Initializer::Initializer(Statement& s) : statement(s) {
    Logger::instance().add(s);
}

namespace {
const char* names[LevelTraits::COUNT] = {
    "trace", "debug", "info", "notice", "warning", "error", "critical"
};

} // namespace

Level LevelTraits::level(const char* name) {
    for (int i =0; i < LevelTraits::COUNT; ++i) {
        if (strcmp(names[i], name)==0)
            return Level(i);
    }
    throw std::runtime_error(std::string("Invalid log level name: ")+name);
}

const char* LevelTraits::name(Level l) {
    return names[l];
}

}} // namespace qpid::log