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Copy pathRopeString.cpp
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186 lines (164 loc) · 5.64 KB
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/*
* Copyright (c) 2016-present Samsung Electronics Co., Ltd
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301
* USA
*/
#include "Escargot.h"
#include "RopeString.h"
#include "StringBuilder.h"
#include "ErrorObject.h"
namespace Escargot {
void* RopeString::operator new(size_t size)
{
static MAY_THREAD_LOCAL bool typeInited = false;
static MAY_THREAD_LOCAL GC_descr descr;
if (!typeInited) {
GC_word obj_bitmap[GC_BITMAP_SIZE(RopeString)] = { 0 };
GC_set_bit(obj_bitmap, GC_WORD_OFFSET(RopeString, m_left));
GC_set_bit(obj_bitmap, GC_WORD_OFFSET(RopeString, m_bufferData.buffer));
descr = GC_make_descriptor(obj_bitmap, GC_WORD_LEN(RopeString));
typeInited = true;
}
return GC_MALLOC_EXPLICITLY_TYPED(size, descr);
}
String* RopeString::createRopeString(String* lstr, String* rstr, ExecutionState* state)
{
size_t llen = lstr->length();
if (llen == 0) {
return rstr;
}
size_t rlen = rstr->length();
if (rlen == 0) {
return lstr;
}
if (llen + rlen < ROPE_STRING_MIN_LENGTH) {
const auto& lData = lstr->bufferAccessData();
const auto& rData = rstr->bufferAccessData();
if (LIKELY(lData.has8BitContent && rData.has8BitContent)) {
Latin1StringData ret;
size_t len = lData.length + rData.length;
ret.resizeWithUninitializedValues(len);
LChar* result = ret.data();
const LChar* buffer = (const LChar*)lData.buffer;
for (size_t i = 0; i < lData.length; i++) {
result[i] = buffer[i];
}
result += lData.length;
buffer = (const LChar*)rData.buffer;
for (size_t i = 0; i < rData.length; i++) {
result[i] = buffer[i];
}
return new Latin1String(std::move(ret));
} else {
StringBuilder builder;
builder.appendString(lstr);
builder.appendString(rstr);
return builder.finalize();
}
}
if (state && UNLIKELY((llen + rlen) > STRING_MAXIMUM_LENGTH)) {
ErrorObject::throwBuiltinError(*state, ErrorObject::RangeError, ErrorObject::Messages::String_InvalidStringLength);
}
RopeString* rope = new RopeString();
rope->m_bufferData.length = llen + rlen;
rope->m_left = lstr;
rope->m_bufferData.buffer = rstr;
bool l8bit;
if (lstr->isRopeString()) {
l8bit = ((RopeString*)lstr)->m_bufferData.has8BitContent;
} else {
l8bit = lstr->has8BitContent();
}
bool r8bit;
if (rstr->isRopeString()) {
r8bit = ((RopeString*)rstr)->m_bufferData.has8BitContent;
} else {
r8bit = rstr->has8BitContent();
}
rope->m_bufferData.has8BitContent = l8bit & r8bit;
return rope;
}
template <typename ResultType>
void RopeString::flattenRopeStringWorker()
{
ResultType* result = (ResultType*)GC_MALLOC_ATOMIC(sizeof(ResultType) * m_bufferData.length);
std::vector<String*> queue;
queue.push_back(left());
queue.push_back(right());
size_t pos = m_bufferData.length;
while (!queue.empty()) {
String* cur = queue.back();
queue.pop_back();
if (cur->isRopeString()) {
RopeString* cur2 = (RopeString*)cur;
if (cur2->m_bufferData.hasSpecialImpl) {
queue.push_back(cur2->left());
queue.push_back(cur2->right());
continue;
}
}
String* sub = cur;
const auto& data = sub->bufferAccessData();
pos -= data.length;
size_t subLength = data.length;
if (data.has8BitContent) {
auto ptr = (const LChar*)data.buffer;
for (size_t i = 0; i < subLength; i++) {
result[i + pos] = ptr[i];
}
} else {
auto ptr = (const char16_t*)data.buffer;
for (size_t i = 0; i < subLength; i++) {
result[i + pos] = ptr[i];
}
}
}
m_bufferData.hasSpecialImpl = false;
m_bufferData.buffer = result;
m_left = nullptr;
}
void RopeString::flattenRopeString()
{
ASSERT(m_left);
if (m_bufferData.has8BitContent) {
flattenRopeStringWorker<LChar>();
} else {
flattenRopeStringWorker<char16_t>();
}
}
UTF8StringDataNonGCStd RopeString::toNonGCUTF8StringData(int options) const
{
return bufferAccessData().toUTF8String<UTF8StringDataNonGCStd>();
}
UTF8StringData RopeString::toUTF8StringData() const
{
return bufferAccessData().toUTF8String<UTF8StringData>();
}
UTF16StringData RopeString::toUTF16StringData() const
{
auto data = bufferAccessData();
if (data.has8BitContent) {
UTF16StringData ret;
ret.resizeWithUninitializedValues(data.length);
for (size_t i = 0; i < data.length; i++) {
ret[i] = data.uncheckedCharAtFor8Bit(i);
}
return ret;
} else {
return UTF16StringData(data.bufferAs16Bit, data.length);
}
}
} // namespace Escargot