#include "config.h"
#include "CString.h"
using namespace std;
namespace WTF {
CString::CString(const char* str)
{
init(str, strlen(str));
}
CString::CString(const char* str, unsigned length)
{
init(str, length);
}
void CString::init(const char* str, unsigned length)
{
if (!str)
return;
if (length >= numeric_limits<size_t>::max())
CRASH();
m_buffer = CStringBuffer::create(length + 1);
memcpy(m_buffer->mutableData(), str, length);
m_buffer->mutableData()[length] = '\0';
}
char* CString::mutableData()
{
copyBufferIfNeeded();
if (!m_buffer)
return 0;
return m_buffer->mutableData();
}
CString CString::newUninitialized(size_t length, char*& characterBuffer)
{
if (length >= numeric_limits<size_t>::max())
CRASH();
CString result;
result.m_buffer = CStringBuffer::create(length + 1);
char* bytes = result.m_buffer->mutableData();
bytes[length] = '\0';
characterBuffer = bytes;
return result;
}
void CString::copyBufferIfNeeded()
{
if (!m_buffer || m_buffer->hasOneRef())
return;
RefPtr<CStringBuffer> buffer = m_buffer.release();
size_t length = buffer->length();
m_buffer = CStringBuffer::create(length);
memcpy(m_buffer->mutableData(), buffer->data(), length);
}
bool operator==(const CString& a, const CString& b)
{
if (a.isNull() != b.isNull())
return false;
if (a.length() != b.length())
return false;
return !strncmp(a.data(), b.data(), min(a.length(), b.length()));
}
}