#include "config.h"
#include "PlatformString.h"
#include "SharedBuffer.h"
#include "TextBreakIterator.h"
#include <wtf/unicode/UTF8.h>
#include <wtf/unicode/Unicode.h>
using namespace WTF;
using namespace WTF::Unicode;
namespace WebCore {
PassRefPtr<SharedBuffer> utf8Buffer(const String& string)
{
const int length = string.length();
Vector<char> buffer(length * 3);
char* p = buffer.data();
const UChar* d = string.characters();
ConversionResult result = convertUTF16ToUTF8(&d, d + length, &p, p + buffer.size(), true);
if (result != conversionOK)
return 0;
buffer.shrink(p - buffer.data());
return SharedBuffer::adoptVector(buffer);
}
unsigned numGraphemeClusters(const String& s)
{
NonSharedCharacterBreakIterator it(s.characters(), s.length());
if (!it)
return s.length();
unsigned num = 0;
while (textBreakNext(it) != TextBreakDone)
++num;
return num;
}
unsigned numCharactersInGraphemeClusters(const String& s, unsigned numGraphemeClusters)
{
NonSharedCharacterBreakIterator it(s.characters(), s.length());
if (!it)
return min(s.length(), numGraphemeClusters);
for (unsigned i = 0; i < numGraphemeClusters; ++i) {
if (textBreakNext(it) == TextBreakDone)
return s.length();
}
return textBreakCurrent(it);
}
}