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/*
* Copyright (C) 2009 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef JSStringBuilder_h
#define JSStringBuilder_h
#include "ExceptionHelpers.h"
#include "JSString.h"
#include <wtf/Vector.h>
namespace JSC {
class JSStringBuilder {
public:
JSStringBuilder()
: m_okay(true)
, m_is8Bit(true)
{
}
void append(const UChar u)
{
if (m_is8Bit) {
if (u < 0xff) {
LChar c = u;
m_okay &= buffer8.tryAppend(&c, 1);
return;
}
upConvert();
}
m_okay &= buffer16.tryAppend(&u, 1);
}
void append(const char* str)
{
append(str, strlen(str));
}
void append(const char* str, size_t len)
{
if (m_is8Bit) {
m_okay &= buffer8.tryAppend(reinterpret_cast<const LChar*>(str), len);
return;
}
m_okay &= buffer8.tryReserveCapacity(buffer16.size() + len);
for (size_t i = 0; i < len; i++) {
UChar u = static_cast<unsigned char>(str[i]);
m_okay &= buffer16.tryAppend(&u, 1);
}
}
void append(const LChar* str, size_t len)
{
if (m_is8Bit) {
m_okay &= buffer8.tryAppend(str, len);
return;
}
m_okay &= buffer8.tryReserveCapacity(buffer16.size() + len);
for (size_t i = 0; i < len; i++) {
UChar u = str[i];
m_okay &= buffer16.tryAppend(&u, 1);
}
}
void append(const UChar* str, size_t len)
{
if (m_is8Bit)
upConvert(); // FIXME: We could check character by character its size.
m_okay &= buffer16.tryAppend(str, len);
}
void append(const String& str)
{
unsigned length = str.length();
if (!length)
return;
if (m_is8Bit) {
if (str.is8Bit()) {
m_okay &= buffer8.tryAppend(str.characters8(), length);
return;
}
upConvert();
}
m_okay &= buffer16.tryAppend(str.characters(), length);
}
void upConvert()
{
ASSERT(m_is8Bit);
size_t len = buffer8.size();
for (size_t i = 0; i < len; i++)
buffer16.append(buffer8[i]);
buffer8.clear();
m_is8Bit = false;
}
JSValue build(ExecState* exec)
{
if (!m_okay)
return throwOutOfMemoryError(exec);
if (m_is8Bit) {
buffer8.shrinkToFit();
if (!buffer8.data())
return throwOutOfMemoryError(exec);
return jsString(exec, String::adopt(buffer8));
}
buffer16.shrinkToFit();
if (!buffer16.data())
return throwOutOfMemoryError(exec);
return jsString(exec, String::adopt(buffer16));
}
protected:
Vector<LChar, 64, UnsafeVectorOverflow> buffer8;
Vector<UChar, 64, UnsafeVectorOverflow> buffer16;
bool m_okay;
bool m_is8Bit;
};
template<typename StringType1, typename StringType2>
inline JSValue jsMakeNontrivialString(ExecState* exec, StringType1 string1, StringType2 string2)
{
PassRefPtr<StringImpl> result = WTF::tryMakeString(string1, string2);
if (!result)
return throwOutOfMemoryError(exec);
return jsNontrivialString(exec, result);
}
template<typename StringType1, typename StringType2, typename StringType3>
inline JSValue jsMakeNontrivialString(ExecState* exec, StringType1 string1, StringType2 string2, StringType3 string3)
{
PassRefPtr<StringImpl> result = WTF::tryMakeString(string1, string2, string3);
if (!result)
return throwOutOfMemoryError(exec);
return jsNontrivialString(exec, result);
}
template<typename StringType1, typename StringType2, typename StringType3, typename StringType4>
inline JSValue jsMakeNontrivialString(ExecState* exec, StringType1 string1, StringType2 string2, StringType3 string3, StringType4 string4)
{
PassRefPtr<StringImpl> result = WTF::tryMakeString(string1, string2, string3, string4);
if (!result)
return throwOutOfMemoryError(exec);
return jsNontrivialString(exec, result);
}
template<typename StringType1, typename StringType2, typename StringType3, typename StringType4, typename StringType5>
inline JSValue jsMakeNontrivialString(ExecState* exec, StringType1 string1, StringType2 string2, StringType3 string3, StringType4 string4, StringType5 string5)
{
PassRefPtr<StringImpl> result = WTF::tryMakeString(string1, string2, string3, string4, string5);
if (!result)
return throwOutOfMemoryError(exec);
return jsNontrivialString(exec, result);
}
template<typename StringType1, typename StringType2, typename StringType3, typename StringType4, typename StringType5, typename StringType6>
inline JSValue jsMakeNontrivialString(ExecState* exec, StringType1 string1, StringType2 string2, StringType3 string3, StringType4 string4, StringType5 string5, StringType6 string6)
{
PassRefPtr<StringImpl> result = WTF::tryMakeString(string1, string2, string3, string4, string5, string6);
if (!result)
return throwOutOfMemoryError(exec);
return jsNontrivialString(exec, result);
}
}
#endif
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