celtic / akari

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akari / Strings.cpp
100644 125 lines (92 sloc) 2.097 kb
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#include <Strings.hpp>
#include <POSIX.hpp>
#include <debug.hpp>
 
ASCIIString::ASCIIString(): _data(0), _dataLength(0) { }
 
ASCIIString::ASCIIString(const ASCIIString &src) {
	operator =(src);
}
 
ASCIIString::ASCIIString(const char *&src) {
	operator =(src);
}
 
ASCIIString::~ASCIIString() {
	if (_data)
		delete [] _data;
}
 
ASCIIString &ASCIIString::operator =(const ASCIIString &src) {
	if (_data)
		delete [] _data;
 
	_dataLength = src._dataLength;
 
	if (_dataLength == 0) {
		_data = 0;
		return *this;
	}
 
	_data = new char[_dataLength + 1];
	POSIX::memcpy(_data, src._data, _dataLength + 1);
 
	return *this;
}
 
ASCIIString &ASCIIString::operator =(const char *&src) {
	if (_data)
		delete [] _data;
 
	if (!src) {
		_dataLength = 0;
		_data = 0;
		return *this;
	}
 
	_dataLength = POSIX::strlen(src);
 
	if (_dataLength == 0) {
		_data = 0;
		return *this;
	}
 
	_data = new char[_dataLength + 1];
	POSIX::memcpy(_data, src, _dataLength + 1);
 
	return *this;
}
 
bool ASCIIString::operator ==(const ASCIIString &r) const {
	if (_dataLength != r._dataLength)
		return false;
 
	return operator ==(r._data);
}
 
bool ASCIIString::operator ==(const char *r) const {
	const char *l = _data;
 
	while (*l && *r) {
		if (*l != *r)
			return false;
		++l, ++r;
	}
 
	if (*l != *r)
		return false;
 
	return true;
}
 
bool ASCIIString::operator !() const {
	return empty();
}
 
char ASCIIString::operator[](u32 n) const {
	ASSERT(n < _dataLength);
	return _data[n];
}
 
char &ASCIIString::operator[](u32 n) {
	ASSERT(n < _dataLength);
	return _data[n];
}
 
bool ASCIIString::empty() const {
	return (_dataLength == 0);
}
 
u32 ASCIIString::length() const {
	return _dataLength;
}
 
const char *ASCIIString::getCString() const {
	static char *buffer = 0;
	static u32 bufferLength = 0;	// includes NUL allocated
 
	if (!buffer || bufferLength < (_dataLength + 1)) {
		if (buffer)
			delete [] buffer;
 
		buffer = new char[_dataLength + 1];
		bufferLength = _dataLength + 1;
	}
 
	if (_dataLength == 0) {
		*buffer = 0;
	} else {
		POSIX::memcpy(buffer, _data, _dataLength + 1);
	}
 
	return (const char *)buffer;
}