1 files changed, 116 insertions, 0 deletions
diff --git a/Swiften/Base/String.cpp b/Swiften/Base/String.cpp
new file mode 100644
index 0000000..cc989f6
--- /dev/null
+++ b/Swiften/Base/String.cpp
@@ -0,0 +1,116 @@
+#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::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();
+	}
+}
+
+String String::getLowerCase() const {
+	std::string lower(data_);
+	std::transform(lower.begin(), lower.end(), lower.begin(), ::tolower);
+	return String(lower);
+}
+
+std::vector<String> String::split(char c) const {
+	assert((c & 0x80) == 0);
+	std::vector<String> result;
+	String accumulator;
+	for (size_t i = 0; i < data_.size(); ++i) {
+		if (data_[i] == c) {
+			result.push_back(accumulator);
+			accumulator = "";
+		}
+		else {
+			accumulator += data_[i];
+		}
+	}
+	result.push_back(accumulator);
+	return result;
+}
+
+}