/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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.
 */

#define __STDC_CONSTANT_MACROS
#include <log4cxx/logstring.h>
#include <log4cxx/helpers/stringhelper.h>
#include <log4cxx/helpers/transcoder.h>
#include <algorithm>
#include <vector>
#include <apr_strings.h>
#include <log4cxx/helpers/pool.h>
#if !defined(LOG4CXX)
	#define LOG4CXX 1
#endif
#include <log4cxx/private/log4cxx_private.h>
#include <cctype>
#include <iterator>
#include <apr.h>
//LOG4CXX-417: need stdlib.h for atoi on some systems.
#ifdef APR_HAVE_STDLIB_H
	#include <stdlib.h>
#endif


using namespace log4cxx;
using namespace log4cxx::helpers;

bool StringHelper::equalsIgnoreCase(const LogString& s1, const logchar* upper, const logchar* lower)
{
	for (LogString::const_iterator iter = s1.begin();
		iter != s1.end();
		iter++, upper++, lower++)
	{
		if (*iter != *upper && *iter != * lower)
		{
			return false;
		}
	}

	return (*upper == 0);
}

bool StringHelper::equalsIgnoreCase(const LogString& s1, const LogString& upper, const LogString& lower)
{
	LogString::const_iterator u = upper.begin();
	LogString::const_iterator l = lower.begin();
	LogString::const_iterator iter = s1.begin();

	for (;
		iter != s1.end() && u != upper.end() && l != lower.end();
		iter++, u++, l++)
	{
		if (*iter != *u && *iter != *l)
		{
			return false;
		}
	}

	return u == upper.end() && iter == s1.end();
}


LogString StringHelper::toLowerCase(const LogString& s)
{
	LogString d;
	std::transform(s.begin(), s.end(),
		std::insert_iterator<LogString>(d, d.begin()), tolower);
	return d;
}

LogString StringHelper::trim(const LogString& s)
{
	LogString::size_type pos = s.find_first_not_of(' ');

	if (pos == std::string::npos)
	{
		return LogString();
	}

	LogString::size_type n = s.find_last_not_of(' ') - pos + 1;
	return s.substr(pos, n);
}

bool StringHelper::startsWith(const LogString& s, const LogString& prefix)
{
	if (s.length() < prefix.length())
	{
		return false;
	}

	return s.compare(0, prefix.length(), prefix) == 0;
}

bool StringHelper::endsWith(const LogString& s, const LogString& suffix)
{
	if (suffix.length() <= s.length())
	{
		return s.compare(s.length() - suffix.length(), suffix.length(), suffix) == 0;
	}

	return false;
}


int StringHelper::toInt(const LogString& s)
{
	std::string as;
	Transcoder::encode(s, as);
	return atoi(as.c_str());
}

log4cxx_int64_t StringHelper::toInt64(const LogString& s)
{
	std::string as;
	Transcoder::encode(s, as);
	return apr_atoi64(as.c_str());
}

void StringHelper::toString(int n, Pool& pool, LogString& s)
{
	char* fmt = pool.itoa(n);
	Transcoder::decode(fmt, s);
}

void StringHelper::toString(bool val, LogString& dst)
{
	if (val)
	{
		dst.append(LOG4CXX_STR("true"));
	}
	else
	{
		dst.append(LOG4CXX_STR("false"));
	}
}


void StringHelper::toString(log4cxx_int64_t n, Pool& pool, LogString& dst)
{
	if (n >= INT_MIN && n <= INT_MAX)
	{
		toString((int) n, pool, dst);
	}
	else
	{
		const log4cxx_int64_t BILLION = APR_INT64_C(1000000000);
		int billions = (int) (n / BILLION);
		char* upper = pool.itoa(billions);
		int remain = (int) (n - billions * BILLION);

		if (remain < 0)
		{
			remain *= -1;
		}

		char* lower = pool.itoa(remain);
		Transcoder::decode(upper, dst);
		dst.append(9 - strlen(lower), 0x30 /* '0' */);
		Transcoder::decode(lower, dst);
	}
}


void StringHelper::toString(size_t n, Pool& pool, LogString& s)
{
	toString((log4cxx_int64_t) n, pool, s);
}

LogString StringHelper::format(const LogString& pattern, const std::vector<LogString>& params)
{

	LogString result;
	int i = 0;

	while (pattern[i] != 0)
	{
		if (pattern[i] == 0x7B /* '{' */ && pattern[i + 1] >= 0x30 /* '0' */ &&
			pattern[i + 1] <= 0x39 /* '9' */ && pattern[i + 2] == 0x7D /* '}' */)
		{
			int arg = pattern[i + 1] - 0x30 /* '0' */;
			result = result + params[arg];
			i += 3;
		}
		else
		{
			result = result + pattern[i];
			i++;
		}
	}

	return result;
}