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/*
* Copyright (c) 2010 Remko Tronçon
* Licensed under the GNU General Public License v3.
* See Documentation/Licenses/GPLv3.txt for more information.
*/
#include <cassert>
#include <algorithm>
#include <Swiften/Base/String.h>
namespace Swift {
static inline size_t sequenceLength(char firstByte) {
if ((firstByte & 0x80) == 0) {
return 1;
}
if ((firstByte & 0xE0) == 0xC0) {
return 2;
}
if ((firstByte & 0xF0) == 0xE0) {
return 3;
}
if ((firstByte & 0xF8) == 0xF0) {
return 4;
}
if ((firstByte & 0xFC) == 0xF8) {
return 5;
}
if ((firstByte & 0xFE) == 0xFC) {
return 6;
}
assert(false);
return 1;
}
std::vector<unsigned int> String::getUnicodeCodePoints(const std::string& s) {
std::vector<unsigned int> result;
for (size_t i = 0; i < s.size();) {
unsigned int codePoint = 0;
char firstChar = s[i];
size_t length = sequenceLength(firstChar);
// First character is special
size_t firstCharBitSize = 7 - length;
if (length == 1) {
firstCharBitSize = 7;
}
codePoint = firstChar & ((1<<(firstCharBitSize+1)) - 1);
for (size_t j = 1; j < length; ++j) {
codePoint = (codePoint<<6) | (s[i+j] & 0x3F);
}
result.push_back(codePoint);
i += length;
}
return result;
}
std::pair<std::string,std::string> String::getSplittedAtFirst(const std::string& s, char c) {
assert((c & 0x80) == 0);
size_t firstMatch = s.find(c);
if (firstMatch != s.npos) {
return std::make_pair(s.substr(0,firstMatch),s.substr(firstMatch+1,s.npos));
}
else {
return std::make_pair(s, "");
}
}
void String::replaceAll(std::string& src, char c, const std::string& s) {
size_t lastPos = 0;
size_t matchingIndex = 0;
while ((matchingIndex = src.find(c, lastPos)) != src.npos) {
src.replace(matchingIndex, 1, s);
lastPos = matchingIndex + s.size();
}
}
std::vector<std::string> String::split(const std::string& s, char c) {
assert((c & 0x80) == 0);
std::vector<std::string> result;
std::string accumulator;
for (size_t i = 0; i < s.size(); ++i) {
if (s[i] == c) {
result.push_back(accumulator);
accumulator = "";
}
else {
accumulator += s[i];
}
}
result.push_back(accumulator);
return result;
}
}
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Swift