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#include <cassert>
#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::vector<unsigned int> result;
for (size_t i = 0; i < data_.size();) {
unsigned int codePoint = 0;
char firstChar = data_[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) | (data_[i+j] & 0x3F);
}
result.push_back(codePoint);
i += length;
}
return result;
}
std::pair<String,String> String::getSplittedAtFirst(char c) const {
assert((c & 0x80) == 0);
size_t firstMatch = data_.find(c);
if (firstMatch != data_.npos) {
return std::make_pair(data_.substr(0,firstMatch),data_.substr(firstMatch+1,data_.npos));
}
else {
return std::make_pair(*this, "");
}
}
size_t String::getLength() const {
size_t size = 0, current = 0, end = data_.size();
while (current < end) {
size++;
current += sequenceLength(data_[current]);
}
return size;
}
void String::removeAll(char c) {
size_t lastPos = 0;
size_t matchingIndex = 0;
while ((matchingIndex = data_.find(c, lastPos)) != data_.npos) {
data_.erase(matchingIndex, 1);
lastPos = matchingIndex;
}
}
void String::replaceAll(char c, const String& s) {
size_t lastPos = 0;
size_t matchingIndex = 0;
while ((matchingIndex = data_.find(c, lastPos)) != data_.npos) {
data_.replace(matchingIndex, 1, s.data_);
lastPos = matchingIndex + s.data_.size();
}
}
}
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Swift