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Diffstat (limited to 'Swiften/Base/String.cpp')
-rw-r--r--Swiften/Base/String.cpp93
1 files changed, 93 insertions, 0 deletions
diff --git a/Swiften/Base/String.cpp b/Swiften/Base/String.cpp
new file mode 100644
index 0000000..88692b7
--- /dev/null
+++ b/Swiften/Base/String.cpp
@@ -0,0 +1,93 @@
+#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();
+ }
+}
+
+
+}