/**
 * Copyright (C) 2006 Apple Computer, Inc.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library General Public License
 * along with this library; see the file COPYING.LIB.  If not, write to
 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA 02110-1301, USA.
 *
 */

#include "third_party/blink/renderer/platform/wtf/text/wtf_string.h"

#include <CoreFoundation/CoreFoundation.h>

#include "base/apple/bridging.h"

namespace blink {

String::String(NSString* str) {
  if (!str) {
    return;
  }

  CFStringRef cf_str = base::apple::NSToCFPtrCast(str);

  CFIndex size = CFStringGetLength(cf_str);
  if (size == 0) {
    impl_ = StringImpl::empty_;
  } else {
    Vector<LChar, 1024> lchar_buffer(base::checked_cast<wtf_size_t>(size));
    CFIndex used_buf_len;
    CFIndex converted_size = CFStringGetBytes(
        cf_str, CFRangeMake(0, size), kCFStringEncodingISOLatin1,
        /*lossByte=*/0, /*isExternalRepresentation=*/false, lchar_buffer.data(),
        size, &used_buf_len);
    if ((converted_size == size) && (used_buf_len == size)) {
      impl_ = StringImpl::Create(lchar_buffer);
      return;
    }

    Vector<UChar, 1024> uchar_buffer(base::checked_cast<wtf_size_t>(size));
    CFStringGetCharacters(cf_str, CFRangeMake(0, size),
                          reinterpret_cast<UniChar*>(uchar_buffer.data()));
    impl_ = StringImpl::Create(uchar_buffer);
  }
}

}  // namespace blink
