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// <dwu/capture> -*- C++ -*-
//
// Copyright (c) 2019 Wolfgang 'datenwolf' Draxinger
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
// SOFTWARE.
#pragma once
#ifndef DWU__CAPTURE__
#define DWU__CAPTURE__ 1
#include <iterator>
namespace dwu {
template<class S>
S capture(S s)
{
auto it_w = s.begin();
for( auto it_r = s.begin()
; s.end() != it_r
; it_w = std::next(it_w)
){
if( '\\' != *it_r ){
*it_w = *it_r;
it_r = std::next(it_r);
continue;
}
it_r = std::next(it_r);
if( s.end() == it_r ){ break; }
int c = 0;
if( '0' <= *it_r && '7' >= *it_r ){
c = 0;
while( s.end() != it_r
&& '0' <= *it_r && '7' >= *it_r
){
c = (c<<3) | ((*it_r) - '0');
it_r = std::next(it_r);
}
} else
if( 'x' == *it_r ){
c = 0;
it_r = std::next(it_r);
while( s.end() != it_r ){
int nyb = 0;
if( '0' <= *it_r && '9' >= *it_r ){
nyb = (*it_r) - '0' + 0x0;
} else
if( 'a' <= *it_r && 'f' >= *it_r ){
nyb = (*it_r) - 'a' + 0xA;
} else
if( 'A' <= *it_r && 'F' >= *it_r ){
nyb = (*it_r) - 'A' + 0xA;
} else break;
c = (c<<4) | nyb;
it_r = std::next(it_r);
}
} else {
switch( *it_r ){
case 'a': c = '\a'; break;
case 'b': c = '\b'; break;
case 'f': c = '\f'; break;
case 'n': c = '\n'; break;
case 'r': c = '\r'; break;
case 't': c = '\t'; break;
case 'v': c = '\v'; break;
default: c = 0xFF;
}
it_r = std::next(it_r);
}
*it_w = c;
}
s.resize(it_w - s.begin());
return s;
}
}
#endif/*DWU__CAPTURE__*/
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