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/*
* This file is a part of PikoTools
* and is distributed under the (new) BSD licence.
* Author: Tomasz Sowa <t.sowa@ttmath.org>
*/
/*
* Copyright (c) 2018, Tomasz Sowa
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* * Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* * Neither the name Tomasz Sowa nor the names of contributors to this
* project may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef headerfile_picotools_convert_patternreplacer
#define headerfile_picotools_convert_patternreplacer
#include <string>
#include "textstream/textstream.h"
#include "strtoint.h"
namespace pt
{
template<typename CharType, typename StrType>
class PatternReplacerBase
{
public:
/*
* output_string can be the same string as input pattern
*/
template<typename ... Types>
void ReplaceToString(const StrType & pattern, StrType & output_string, Types ... types)
{
ReplaceGeneric(pattern, output_string, types...);
}
template<typename ... Types>
StrType Replace(const StrType & pattern, Types ... types)
{
StrType output_string;
ReplaceGeneric(pattern, output_string, types...);
return output_string;
}
private:
std::vector<StrType> params;
TextStreamBase<CharType, 256, 4096> buffer;
StrType temp_str;
template<typename ... Types>
void ReplaceGeneric(const StrType & pattern, StrType & output_string, Types ... types)
{
params.clear();
AddParams(types...);
ReplacePattern(pattern);
buffer.to_string(output_string);
params.clear();
buffer.clear();
temp_str.clear();
}
void AddParams()
{
}
template<typename Type, typename ... Types>
void AddParams(const Type & type, Types ... types)
{
buffer.clear();
buffer << type;
buffer.to_string(temp_str);
params.push_back(temp_str);
temp_str.clear();
AddParams(types...);
}
void ReplacePattern(const StrType & pattern)
{
buffer.clear();
for(size_t i=0 ; i<pattern.size() ; )
{
bool pattern_changed = false;
if( pattern[i] == '%' )
{
if( i + 1 < pattern.size() )
{
if( pattern[i+1] == '%' )
{
buffer << '%';
i += 2;
pattern_changed = true;
}
else
{
const CharType * index_start_str = &pattern[i+1];
const CharType * after_str;
bool was_overflow;
unsigned long index = Toul(index_start_str, 10, &after_str, &was_overflow, false);
if( !was_overflow && after_str > index_start_str && (size_t)index < params.size() )
{
i = i + 1 + (after_str - index_start_str);
buffer << params[index];
pattern_changed = true;
}
}
}
}
if( !pattern_changed )
{
buffer << pattern[i];
i += 1;
}
}
}
};
typedef PatternReplacerBase<char, std::string> PatternReplacer;
typedef PatternReplacerBase<wchar_t, std::wstring> WPatternReplacer;
}
#endif