78 lines
2.8 KiB
C++
78 lines
2.8 KiB
C++
/*
|
|
Copyright 2015-2016 Amebis
|
|
|
|
This file is part of ZRCola.
|
|
|
|
ZRCola is free software: you can redistribute it and/or modify it
|
|
under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation, either version 3 of the License, or
|
|
(at your option) any later version.
|
|
|
|
ZRCola is distributed in the hope that it will be useful, but
|
|
WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with ZRCola. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#include "stdafx.h"
|
|
|
|
|
|
static inline void Decompose(
|
|
_In_count_(decompositionsCount) const ZRCola::decomposition* decompositions,
|
|
_In_ const size_t decompositionsCount,
|
|
_In_z_count_(inputMax) const wchar_t* input,
|
|
_In_ size_t inputMax,
|
|
_Out_ std::wstring &output,
|
|
_Out_opt_ std::vector<ZRCola::mapping>* map)
|
|
{
|
|
assert(decompositions || decompositionsCount == 0);
|
|
assert(input || inputMax == 0);
|
|
|
|
// Trim inputMax to actual length.
|
|
inputMax = inputMax != (size_t)-1 ? wcsnlen(input, inputMax) : wcslen(input);
|
|
|
|
// Clear the output string and preallocate at least 2*inputMax chars.
|
|
// Since decomposition expands the string, let's keep our fingers crossed to avoid reallocation later.
|
|
output.clear();
|
|
output.reserve(inputMax * 2);
|
|
if (map)
|
|
map->clear();
|
|
|
|
for (size_t i = 0; i < inputMax;) {
|
|
// Find whether the character can be decomposed.
|
|
wchar_t c = input[i];
|
|
|
|
for (size_t l = 0, r = decompositionsCount;; ) {
|
|
if (l < r) {
|
|
size_t m = (l + r) / 2;
|
|
if (c < decompositions[m].src) r = m;
|
|
else if (decompositions[m].src < c) l = m + 1;
|
|
else {
|
|
// Character found.
|
|
output += decompositions[m].dst;
|
|
i++;
|
|
if (map) {
|
|
// Mapping changed.
|
|
map->push_back(ZRCola::mapping(i, output.length()));
|
|
}
|
|
break;
|
|
}
|
|
} else {
|
|
// Character not found.
|
|
output += c;
|
|
i++;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
void ZRCOLA_API ZRCola::Decompose(_In_z_count_(inputMax) const wchar_t* input, _In_ size_t inputMax, _Out_ std::wstring &output, _Out_opt_ std::vector<mapping>* map)
|
|
{
|
|
::Decompose(decompositions, decompositionsCount, input, inputMax, output, map);
|
|
}
|