Added more helpers to string, and fixed a bug in replace_from.

core/string.cpp

@@ -233,12 +233,12 @@ void String::replace_from(const int start_index, const int length, const String
 		}
 
 		_size -= loffs;
-	}
+	} else {
-
 		for (int i = 0; i < length; ++i) {
 			_data[i + start_index] = with._data[i];
 		}
 	}
+}
 
 void String::replace(const String &find_str, const String &with) {
 	if (empty()) {
@@ -255,6 +255,29 @@ void String::replace(const String &find_str, const String &with) {
 	}
 }
 
+void String::replace(const String &find_str, const String &with, const int count) {
+	if (empty()) {
+		return;
+	}
+
+	if (find_str.empty())
+		return;
+
+	int c = 0;
+
+	int start_pos = 0;
+	while ((start_pos = find(find_str, start_pos)) != -1) {
+		replace_from(start_pos, find_str.size(), with);
+		start_pos += with.size();
+
+		++c;
+
+		if (c == count) {
+			return;
+		}
+	}
+}
+
 int String::compare(const String &other) const {
 	if (size() < other.size()) {
 		return 1;
@@ -357,6 +380,61 @@ void String::trim_end() {
 	_size = last_index;
 }
 
+bool String::ends_with(const char c) const {
+	if (_size == 0) {
+		return false;
+	}
+
+	return _data[_size - 1] == c;
+}
+bool String::ends_with(const String &str) const {
+	if (str.size() == 0) {
+		// maybe this should be false?
+		return true;
+	}
+
+	if (_size < str.size()) {
+		return false;
+	}
+
+	int diff = _size - str.size();
+
+	for (int i = str.size() - 1; i >= 0; --i) {
+		if (_data[i + diff] != str._data[i]) {
+			return false;
+		}
+	}
+
+	return true;
+}
+
+bool String::starts_with(const char c) const {
+	if (_size == 0) {
+		return false;
+	}
+
+	return _data[0] == c;
+}
+
+bool String::starts_with(const String &str) const {
+	if (str.size() == 0) {
+		// maybe this should be false?
+		return true;
+	}
+
+	if (_size < str.size()) {
+		return false;
+	}
+
+	for (int i = 0; i < str.size(); ++i) {
+		if (_data[i] != str._data[i]) {
+			return false;
+		}
+	}
+
+	return true;
+}
+
 int String::get_slice_count(const char splitter) const {
 	int count = 1;
 

core/string.h

@@ -35,6 +35,7 @@ public:
 	
 	void replace_from(const int start_index, const int length, const String &with);
 	void replace(const String &find_str, const String &with);
+	void replace(const String &find_str, const String &with, const int count);
 
 	int compare(const String &other) const;
 
@@ -45,6 +46,12 @@ public:
 	void trim_beginning();
 	void trim_end();
 
+	bool ends_with(const char c) const;
+	bool ends_with(const String &str) const;
+
+	bool starts_with(const char c) const;
+	bool starts_with(const String &str) const;
+
 	int get_slice_count(const char splitter) const;
 	int get_slice_count(const String &splitter) const;
 	String get_slice(const char splitter, int index);