API/JSStringRef.cpp

   1 // -*- mode: c++; c-basic-offset: 4 -*-
   2 /*
   3  * Copyright (C) 2006, 2007 Apple Inc. All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  *
  14  * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
  15  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  17  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
  18  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  19  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  20  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  21  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
  22  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  23  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  24  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  25  */
  26
  27 #include "config.h"
  28 #include "JSStringRef.h"
  29
  30 #include <wtf/Platform.h>
  31
  32 #include "APICast.h"
  33 #include <kjs/JSLock.h>
  34 #include <kjs/JSType.h>
  35 #include <kjs/internal.h>
  36 #include <kjs/operations.h>
  37 #include <kjs/ustring.h>
  38 #include <kjs/value.h>
  39 #include <wtf/unicode/UTF8.h>
  40
  41 using namespace KJS;
  42 using namespace WTF::Unicode;
  43
  44 JSStringRef JSStringCreateWithCharacters(const JSChar* chars, size_t numChars)
  45 {
  46     JSLock lock;
  47     return toRef(UString(reinterpret_cast<const KJS::UChar*>(chars), static_cast<int>(numChars)).rep()->ref());
  48 }
  49
  50 JSStringRef JSStringCreateWithUTF8CString(const char* string)
  51 {
  52     JSLock lock;
  53
  54     size_t length = strlen(string);
  55     Vector< ::UChar, 1024> buffer(length);
  56     ::UChar* p = buffer.data();
  57     if (conversionOK != convertUTF8ToUTF16(&string, string + length, &p, p + length))
  58         return 0;
  59
  60     return toRef(UString(reinterpret_cast<KJS::UChar*>(buffer.data()), p - buffer.data()).rep()->ref());
  61 }
  62
  63 JSStringRef JSStringRetain(JSStringRef string)
  64 {
  65     JSLock lock;
  66     UString::Rep* rep = toJS(string);
  67     return toRef(rep->ref());
  68 }
  69
  70 void JSStringRelease(JSStringRef string)
  71 {
  72     JSLock lock;
  73     UString::Rep* rep = toJS(string);
  74     rep->deref();
  75 }
  76
  77 size_t JSStringGetLength(JSStringRef string)
  78 {
  79     UString::Rep* rep = toJS(string);
  80     return rep->size();
  81 }
  82
  83 const JSChar* JSStringGetCharactersPtr(JSStringRef string)
  84 {
  85     UString::Rep* rep = toJS(string);
  86     return reinterpret_cast<const JSChar*>(rep->data());
  87 }
  88
  89 size_t JSStringGetMaximumUTF8CStringSize(JSStringRef string)
  90 {
  91     UString::Rep* rep = toJS(string);
  92
  93     // Any UTF8 character > 3 bytes encodes as a UTF16 surrogate pair.
  94     return rep->size() * 3 + 1; // + 1 for terminating '\0'
  95 }
  96
  97 size_t JSStringGetUTF8CString(JSStringRef string, char* buffer, size_t bufferSize)
  98 {
  99     JSLock lock;
 100     UString::Rep* rep = toJS(string);
 101     CString cString = UString(rep).UTF8String();
 102
 103     size_t length = std::min(bufferSize, cString.size() + 1); // + 1 for terminating '\0'
 104     memcpy(buffer, cString.c_str(), length);
 105     return length;
 106 }
 107
 108 bool JSStringIsEqual(JSStringRef a, JSStringRef b)
 109 {
 110     JSLock lock;
 111
 112     UString::Rep* aRep = toJS(a);
 113     UString::Rep* bRep = toJS(b);
 114
 115     return UString(aRep) == UString(bRep);
 116 }
 117
 118 bool JSStringIsEqualToUTF8CString(JSStringRef a, const char* b)
 119 {
 120     JSStringRef bBuf = JSStringCreateWithUTF8CString(b);
 121     bool result = JSStringIsEqual(a, bBuf);
 122     JSStringRelease(bBuf);
 123
 124     return result;
 125 }