mirror of
https://github.com/Samsung/escargot.git
synced 2026-06-22 10:01:50 +00:00
ccdf475f9b
* In small config, we turn off SyntaxChecker for small binary size * CompressibleString should get VMInstance instead of Context * If ICU is disabled, we don't need unicode information in yarr * Remove unused variable in yarr(RegExpJitTables) * Fix lz4 compile error Signed-off-by: Seonghyun Kim <sh8281.kim@samsung.com>
855 lines
24 KiB
C++
855 lines
24 KiB
C++
/*
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* Copyright (c) 2016-present Samsung Electronics Co., Ltd
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301
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* USA
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*/
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#ifndef __EscargotString__
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#define __EscargotString__
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#include "runtime/PointerValue.h"
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#include "util/BasicString.h"
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#include <string>
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#include "util/Vector.h"
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namespace Escargot {
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// A type to hold a single Latin-1 character.
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typedef unsigned char LChar;
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typedef BasicString<char, GCUtil::gc_malloc_atomic_allocator<char>> ASCIIStringData;
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typedef BasicString<LChar, GCUtil::gc_malloc_atomic_allocator<LChar>> Latin1StringData;
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typedef BasicString<char, GCUtil::gc_malloc_atomic_allocator<char>> UTF8StringData;
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typedef BasicString<char16_t, GCUtil::gc_malloc_atomic_allocator<char16_t>> UTF16StringData;
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typedef BasicString<char32_t, GCUtil::gc_malloc_atomic_allocator<char32_t>> UTF32StringData;
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typedef Vector<String*, GCUtil::gc_malloc_allocator<String*>> StringVector;
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typedef std::basic_string<char, std::char_traits<char>> ASCIIStringDataNonGCStd;
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typedef std::basic_string<LChar, std::char_traits<LChar>> Latin1StringDataNonGCStd;
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typedef std::basic_string<char, std::char_traits<char>> UTF8StringDataNonGCStd;
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typedef std::basic_string<char16_t, std::char_traits<char16_t>> UTF16StringDataNonGCStd;
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typedef std::basic_string<char32_t, std::char_traits<char32_t>> UTF32StringDataNonGCStd;
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std::vector<std::string> split(const std::string& s, char seperator);
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std::vector<std::string> split(const std::string& s, const std::string& seperator);
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bool isASCIIAlpha(char ch);
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bool isASCIIDigit(char ch);
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bool isASCIIAlphanumeric(char ch);
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bool isAllSpecialCharacters(const std::string& s, bool (*fn)(char));
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bool isAllASCII(const char* buf, const size_t len);
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bool isAllASCII(const char16_t* buf, const size_t len);
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bool isAllLatin1(const char16_t* buf, const size_t len);
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bool isIndexString(String* str);
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char32_t readUTF8Sequence(const char*& sequence, bool& valid, int& charlen);
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UTF16StringData utf8StringToUTF16String(const char* buf, const size_t len);
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UTF8StringData utf16StringToUTF8String(const char16_t* buf, const size_t len);
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ASCIIStringData utf16StringToASCIIString(const char16_t* buf, const size_t len);
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ASCIIStringData dtoa(double number);
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size_t utf32ToUtf8(char32_t uc, char* UTF8);
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size_t utf32ToUtf16(char32_t i, char16_t* u);
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// these functions only care ascii range(0~127)
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bool islower(char32_t ch);
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bool isupper(char32_t ch);
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char32_t tolower(char32_t ch);
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char32_t toupper(char32_t ch);
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bool isspace(char32_t ch);
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bool isdigit(char32_t ch);
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class ASCIIString;
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class Latin1String;
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class UTF16String;
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class RopeString;
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class StringView;
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class VMInstance;
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class StringWriteOption {
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public:
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enum {
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NoOptions = 0,
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ReplaceInvalidUtf8 = 1 << 3
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};
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};
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struct StringBufferAccessData {
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bool has8BitContent;
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size_t length;
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union {
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const void* buffer;
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const char* bufferAs8Bit;
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const char16_t* bufferAs16Bit;
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};
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void* extraData;
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StringBufferAccessData(bool has8BitContent, size_t length, void* buffer, void* extraDataKeepInStack = nullptr)
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: has8BitContent(has8BitContent)
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, length(length)
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, buffer(buffer)
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, extraData(extraDataKeepInStack)
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{
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}
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char16_t uncheckedCharAtFor8Bit(size_t idx) const
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{
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ASSERT(has8BitContent);
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return ((LChar*)buffer)[idx];
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}
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char16_t uncheckedCharAtFor16Bit(size_t idx) const
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{
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ASSERT(!has8BitContent);
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return ((char16_t*)buffer)[idx];
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}
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char16_t charAt(size_t idx) const
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{
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if (has8BitContent) {
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return ((LChar*)buffer)[idx];
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} else {
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return ((char16_t*)buffer)[idx];
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}
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}
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static bool equals16Bit(const char16_t* c1, const char* c2, size_t len);
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ALWAYS_INLINE bool equalsSameLength(const char* str, size_t compareStartAt = 0) const
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{
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ASSERT(strlen(str) == length);
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if (LIKELY(has8BitContent)) {
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return memcmp((const char*)buffer + compareStartAt, str + compareStartAt, length - compareStartAt) == 0;
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} else {
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return equals16Bit((const char16_t*)buffer + compareStartAt, str + compareStartAt, length - compareStartAt);
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}
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}
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template <typename OutputType, typename ComputingType>
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OutputType toUTF8String() const
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{
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ComputingType s = toUTF8String<ComputingType>();
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return OutputType(s.data(), s.length());
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}
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template <typename OutputType>
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OutputType toUTF8String(int options = StringWriteOption::NoOptions) const
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{
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OutputType ret;
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const bool replaceInvalidUtf8 = options == StringWriteOption::ReplaceInvalidUtf8;
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const auto& accessData = *this;
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for (size_t i = 0; i < accessData.length; i++) {
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char32_t ch = (uint16_t)accessData.charAt(i);
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if (ch < 0x80) {
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ret.append((char*)&ch, 1);
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} else {
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char32_t finalCh;
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if (U16_IS_LEAD(ch)) {
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if (i + 1 == accessData.length) {
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if (replaceInvalidUtf8) {
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finalCh = 0xFFFD;
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} else {
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finalCh = ch;
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}
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} else {
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char16_t c2 = accessData.charAt(i + 1);
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finalCh = ch;
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if (U16_IS_TRAIL(c2)) {
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finalCh = U16_GET_SUPPLEMENTARY(ch, c2);
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i++;
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} else if (replaceInvalidUtf8) {
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finalCh = 0xFFFD;
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}
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}
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} else if (replaceInvalidUtf8 && U16_IS_TRAIL(ch)) {
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finalCh = 0xFFFD;
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} else {
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finalCh = ch;
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}
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char buf[8];
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auto len = utf32ToUtf8(finalCh, buf);
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ret.append(buf, len);
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}
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}
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return ret;
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}
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};
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class String : public PointerValue {
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friend class AtomicString;
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protected:
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String()
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{
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m_tag = POINTER_VALUE_STRING_TAG_IN_DATA;
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m_bufferData.hasSpecialImpl = false;
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}
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struct StringBufferData {
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bool has8BitContent : 1;
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bool hasSpecialImpl : 1;
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#if defined(ESCARGOT_32)
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size_t length : 30;
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#else
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size_t length : 62;
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#endif
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union {
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const void* buffer;
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const char* bufferAs8Bit;
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const char16_t* bufferAs16Bit;
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String* bufferAsString;
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};
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COMPILE_ASSERT(STRING_MAXIMUM_LENGTH < (std::numeric_limits<size_t>::max() >> 2), "");
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operator StringBufferAccessData() const
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{
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ASSERT(!hasSpecialImpl);
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return StringBufferAccessData(has8BitContent, length, const_cast<void*>(buffer));
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}
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char16_t uncheckedCharAtFor8Bit(size_t idx) const
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{
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ASSERT(has8BitContent);
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return ((LChar*)buffer)[idx];
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}
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char16_t uncheckedCharAtFor16Bit(size_t idx) const
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{
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ASSERT(!has8BitContent);
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return ((char16_t*)buffer)[idx];
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}
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char16_t charAt(size_t idx) const
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{
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if (has8BitContent) {
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return ((LChar*)buffer)[idx];
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} else {
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return ((char16_t*)buffer)[idx];
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}
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}
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};
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public:
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virtual bool isStringView()
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{
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return false;
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}
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virtual bool isCompressibleString()
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{
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return false;
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}
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virtual bool isRopeString()
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{
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return false;
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}
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bool has8BitContent() const
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{
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return m_bufferData.has8BitContent;
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}
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virtual bool hasExternalMemory()
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{
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return false;
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}
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static String* fromASCII(const char* s);
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static String* fromASCII(const char* s, size_t len);
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static String* fromCharCode(char32_t code);
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static String* fromDouble(double v);
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static String* fromInt32(int32_t v)
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{
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// TODO
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return fromDouble(v);
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}
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static String* fromUTF8(const char* src, size_t len);
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#if defined(ENABLE_COMPRESSIBLE_STRING)
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static String* fromUTF8ToCompressibleString(VMInstance* instance, const char* src, size_t len);
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#endif
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size_t length() const
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{
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return m_bufferData.length;
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}
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virtual char16_t charAt(const size_t idx) const
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{
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return bufferAccessData().charAt(idx);
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}
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char16_t operator[](const size_t idx) const
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{
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return charAt(idx);
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}
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ALWAYS_INLINE StringBufferAccessData bufferAccessData() const
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{
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if (UNLIKELY(m_bufferData.hasSpecialImpl)) {
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return const_cast<String*>(this)->bufferAccessDataSpecialImpl();
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}
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return m_bufferData;
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}
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bool isAtomicStringSource() const
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{
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return (m_tag > POINTER_VALUE_STRING_TAG_IN_DATA);
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}
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bool equals(const String* src) const;
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template <const size_t srcLen>
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bool equals(const char (&src)[srcLen]) const
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{
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return equals(src, srcLen - 1);
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}
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bool equals(const char* src, size_t srcLen) const
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{
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if (srcLen != length()) {
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return false;
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}
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for (size_t i = 0; i < srcLen; i++) {
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if (src[i] != charAt(i)) {
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return false;
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}
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}
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return true;
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}
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String* getSubstitution(ExecutionState& state, String* matched, String* str, size_t position, StringVector& captures, Value namedCapture, String* replacement);
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size_t find(String* str, size_t pos = 0);
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template <size_t N>
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size_t find(const char (&str)[N], size_t pos = 0) const
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{
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const size_t srcStrLen = N - 1;
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const size_t size = length();
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if (srcStrLen == 0)
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return pos <= size ? pos : SIZE_MAX;
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if (srcStrLen <= size) {
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char32_t src0 = str[0];
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const auto& data = bufferAccessData();
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if (data.has8BitContent) {
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for (; pos <= size - srcStrLen; ++pos) {
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if (((const LChar*)data.buffer)[pos] == src0) {
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bool same = true;
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for (size_t k = 1; k < srcStrLen; k++) {
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if (((const LChar*)data.buffer)[pos + k] != str[k]) {
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same = false;
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break;
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}
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}
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if (same)
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return pos;
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}
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}
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} else {
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for (; pos <= size - srcStrLen; ++pos) {
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if (((const char16_t*)data.buffer)[pos] == src0) {
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bool same = true;
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for (size_t k = 1; k < srcStrLen; k++) {
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if (((const char16_t*)data.buffer)[pos + k] != str[k]) {
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same = false;
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break;
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}
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}
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if (same)
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return pos;
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}
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}
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}
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}
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return SIZE_MAX;
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}
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template <size_t N>
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bool contains(const char (&str)[N]) const
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{
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return find(str) != SIZE_MAX;
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}
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size_t rfind(String* str, size_t pos);
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String* substring(size_t from, size_t to);
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template <typename T>
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static inline size_t stringHash(T* src, size_t length)
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{
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size_t hash = static_cast<size_t>(0xc70f6907UL);
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for (; length; --length)
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hash = (hash * 131) + *src++;
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return hash;
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}
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size_t hashValue() const
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{
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const auto& data = bufferAccessData();
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size_t len = data.length;
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size_t hash;
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if (LIKELY(data.has8BitContent)) {
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auto ptr = (const LChar*)data.buffer;
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hash = stringHash(ptr, len);
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} else {
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auto ptr = (const char16_t*)data.buffer;
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hash = stringHash(ptr, len);
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}
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if (UNLIKELY((hash % sizeof(size_t)) == 0)) {
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hash++;
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}
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return hash;
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}
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bool operator==(const String& src) const
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{
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return equals(&src);
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}
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bool operator!=(const String& src) const
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{
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return !operator==(src);
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}
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ALWAYS_INLINE
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friend bool operator<(const String& a, const String& b);
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ALWAYS_INLINE
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friend bool operator<=(const String& a, const String& b);
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ALWAYS_INLINE
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friend bool operator>(const String& a, const String& b);
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ALWAYS_INLINE
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friend bool operator>=(const String& a, const String& b);
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ALWAYS_INLINE
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friend int stringCompare(const String& a, const String& b);
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// NOTE these function generates new copy of string data
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virtual UTF16StringData toUTF16StringData() const = 0;
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virtual UTF8StringData toUTF8StringData() const = 0;
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virtual UTF8StringDataNonGCStd toNonGCUTF8StringData(int options = StringWriteOption::NoOptions) const = 0;
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static String* emptyString;
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uint64_t tryToUseAsIndex() const;
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uint64_t tryToUseAsArrayIndex() const;
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bool is8Bit() const
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{
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return has8BitContent();
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}
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template <typename Any>
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const Any* characters() const
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{
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if (is8Bit()) {
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return (Any*)characters8();
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} else {
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return (Any*)characters16();
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}
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}
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virtual const LChar* characters8() const
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{
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RELEASE_ASSERT_NOT_REACHED();
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return nullptr;
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}
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virtual const char16_t* characters16() const
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{
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RELEASE_ASSERT_NOT_REACHED();
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return nullptr;
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}
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uint64_t advanceStringIndex(uint64_t index, bool unicode);
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bool isAllSpecialCharacters(bool (*fn)(char));
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private:
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size_t m_tag;
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protected:
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StringBufferData m_bufferData;
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virtual StringBufferAccessData bufferAccessDataSpecialImpl()
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{
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RELEASE_ASSERT_NOT_REACHED();
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return m_bufferData;
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}
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static int stringCompare(size_t l1, size_t l2, const String* c1, const String* c2);
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template <typename T>
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static ALWAYS_INLINE bool stringEqual(const T* s, const T* s1, const size_t len)
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{
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return memcmp(s, s1, sizeof(T) * len) == 0;
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}
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static ALWAYS_INLINE bool stringEqual(const char16_t* s, const LChar* s1, const size_t len)
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{
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for (size_t i = 0; i < len; i++) {
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if (s[i] != s1[i]) {
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return false;
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}
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}
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return true;
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}
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};
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inline bool operator<(const String& a, const String& b)
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{
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return String::stringCompare(a.length(), b.length(), &a, &b) < 0;
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}
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inline bool operator>(const String& a, const String& b)
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{
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return String::stringCompare(a.length(), b.length(), &a, &b) > 0;
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}
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inline bool operator<=(const String& a, const String& b)
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{
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return String::stringCompare(a.length(), b.length(), &a, &b) <= 0;
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}
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inline bool operator>=(const String& a, const String& b)
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{
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return String::stringCompare(a.length(), b.length(), &a, &b) >= 0;
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}
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inline int stringCompare(const String& a, const String& b)
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{
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return String::stringCompare(a.length(), b.length(), &a, &b);
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}
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class ASCIIString : public String {
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|
public:
|
|
explicit ASCIIString()
|
|
: String()
|
|
{
|
|
ASCIIStringData stringData;
|
|
initBufferAccessData(stringData);
|
|
}
|
|
|
|
explicit ASCIIString(ASCIIStringData&& src)
|
|
: String()
|
|
{
|
|
ASCIIStringData stringData = std::move(src);
|
|
initBufferAccessData(stringData);
|
|
}
|
|
|
|
explicit ASCIIString(const char* str)
|
|
: String()
|
|
{
|
|
ASCIIStringData stringData;
|
|
stringData.append(str, strlen(str));
|
|
initBufferAccessData(stringData);
|
|
}
|
|
|
|
ASCIIString(const char* str, size_t len)
|
|
: String()
|
|
{
|
|
ASCIIStringData stringData;
|
|
stringData.append(str, len);
|
|
initBufferAccessData(stringData);
|
|
}
|
|
|
|
ASCIIString(const char16_t* str, size_t len)
|
|
: String()
|
|
{
|
|
ASCIIStringData stringData;
|
|
stringData.resizeWithUninitializedValues(len);
|
|
for (size_t i = 0; i < len; i++) {
|
|
ASSERT(str[i] < 128);
|
|
stringData[i] = str[i];
|
|
}
|
|
initBufferAccessData(stringData);
|
|
}
|
|
|
|
virtual char16_t charAt(const size_t idx) const override
|
|
{
|
|
return m_bufferData.uncheckedCharAtFor8Bit(idx);
|
|
}
|
|
|
|
virtual const LChar* characters8() const override
|
|
{
|
|
return (const LChar*)m_bufferData.buffer;
|
|
}
|
|
|
|
void initBufferAccessData(ASCIIStringData& stringData)
|
|
{
|
|
m_bufferData.has8BitContent = true;
|
|
m_bufferData.length = stringData.length();
|
|
m_bufferData.buffer = stringData.takeBuffer();
|
|
}
|
|
|
|
virtual UTF16StringData toUTF16StringData() const override;
|
|
virtual UTF8StringData toUTF8StringData() const override;
|
|
virtual UTF8StringDataNonGCStd toNonGCUTF8StringData(int options = StringWriteOption::NoOptions) const override;
|
|
|
|
void* operator new(size_t size);
|
|
void* operator new(size_t size, GCPlacement p)
|
|
{
|
|
return gc::operator new(size, p);
|
|
}
|
|
void* operator new(size_t, void* ptr)
|
|
{
|
|
return ptr;
|
|
}
|
|
void* operator new[](size_t size) = delete;
|
|
};
|
|
|
|
class ASCIIStringFromExternalMemory : public ASCIIString {
|
|
public:
|
|
ASCIIStringFromExternalMemory(const char* str, size_t len)
|
|
: ASCIIString()
|
|
{
|
|
m_bufferData.buffer = str;
|
|
m_bufferData.length = len;
|
|
m_bufferData.hasSpecialImpl = false;
|
|
m_bufferData.has8BitContent = true;
|
|
}
|
|
|
|
virtual bool hasExternalMemory() override
|
|
{
|
|
return true;
|
|
}
|
|
};
|
|
|
|
class Latin1String : public String {
|
|
public:
|
|
explicit Latin1String()
|
|
: String()
|
|
{
|
|
Latin1StringData data;
|
|
initBufferAccessData(data);
|
|
}
|
|
|
|
explicit Latin1String(Latin1StringData&& src)
|
|
: String()
|
|
{
|
|
Latin1StringData data = std::move(src);
|
|
initBufferAccessData(data);
|
|
}
|
|
|
|
explicit Latin1String(const char* str)
|
|
: String()
|
|
{
|
|
Latin1StringData data;
|
|
data.append((const LChar*)str, strlen(str));
|
|
initBufferAccessData(data);
|
|
}
|
|
|
|
Latin1String(const char* str, size_t len)
|
|
: String()
|
|
{
|
|
Latin1StringData data;
|
|
data.append((const LChar*)str, len);
|
|
initBufferAccessData(data);
|
|
}
|
|
|
|
Latin1String(const LChar* str, size_t len)
|
|
: String()
|
|
{
|
|
Latin1StringData data;
|
|
data.append(str, len);
|
|
initBufferAccessData(data);
|
|
}
|
|
|
|
Latin1String(const char16_t* str, size_t len)
|
|
: String()
|
|
{
|
|
Latin1StringData data;
|
|
|
|
data.resizeWithUninitializedValues(len);
|
|
for (size_t i = 0; i < len; i++) {
|
|
ASSERT(str[i] < 256);
|
|
data[i] = str[i];
|
|
}
|
|
initBufferAccessData(data);
|
|
}
|
|
|
|
void initBufferAccessData(Latin1StringData& stringData)
|
|
{
|
|
m_bufferData.has8BitContent = true;
|
|
m_bufferData.length = stringData.length();
|
|
m_bufferData.buffer = stringData.takeBuffer();
|
|
}
|
|
|
|
virtual char16_t charAt(const size_t idx) const override
|
|
{
|
|
return m_bufferData.uncheckedCharAtFor8Bit(idx);
|
|
}
|
|
|
|
virtual const LChar* characters8() const override
|
|
{
|
|
return (const LChar*)m_bufferData.buffer;
|
|
}
|
|
|
|
virtual UTF16StringData toUTF16StringData() const override;
|
|
virtual UTF8StringData toUTF8StringData() const override;
|
|
virtual UTF8StringDataNonGCStd toNonGCUTF8StringData(int options = StringWriteOption::NoOptions) const override;
|
|
|
|
void* operator new(size_t size);
|
|
void* operator new[](size_t size) = delete;
|
|
};
|
|
|
|
class Latin1StringFromExternalMemory : public Latin1String {
|
|
public:
|
|
Latin1StringFromExternalMemory(const unsigned char* str, size_t len)
|
|
: Latin1String()
|
|
{
|
|
m_bufferData.buffer = str;
|
|
m_bufferData.length = len;
|
|
m_bufferData.hasSpecialImpl = false;
|
|
m_bufferData.has8BitContent = true;
|
|
}
|
|
|
|
virtual bool hasExternalMemory() override
|
|
{
|
|
return true;
|
|
}
|
|
};
|
|
|
|
class UTF16String : public String {
|
|
public:
|
|
explicit UTF16String()
|
|
: String()
|
|
{
|
|
UTF16StringData data;
|
|
initBufferAccessData(data);
|
|
}
|
|
|
|
explicit UTF16String(UTF16StringData&& src)
|
|
: String()
|
|
{
|
|
UTF16StringData data = std::move(src);
|
|
initBufferAccessData(data);
|
|
}
|
|
|
|
UTF16String(const char16_t* str, size_t len)
|
|
: String()
|
|
{
|
|
UTF16StringData data;
|
|
data.append(str, len);
|
|
initBufferAccessData(data);
|
|
}
|
|
|
|
void initBufferAccessData(UTF16StringData& stringData)
|
|
{
|
|
m_bufferData.has8BitContent = false;
|
|
m_bufferData.length = stringData.length();
|
|
m_bufferData.buffer = stringData.takeBuffer();
|
|
}
|
|
|
|
virtual char16_t charAt(const size_t idx) const override
|
|
{
|
|
return m_bufferData.uncheckedCharAtFor16Bit(idx);
|
|
}
|
|
|
|
virtual const char16_t* characters16() const override
|
|
{
|
|
return (const char16_t*)m_bufferData.buffer;
|
|
}
|
|
|
|
virtual UTF16StringData toUTF16StringData() const override;
|
|
virtual UTF8StringData toUTF8StringData() const override;
|
|
virtual UTF8StringDataNonGCStd toNonGCUTF8StringData(int options = StringWriteOption::NoOptions) const override;
|
|
|
|
void* operator new(size_t size);
|
|
void* operator new[](size_t size) = delete;
|
|
};
|
|
|
|
class UTF16StringFromExternalMemory : public UTF16String {
|
|
public:
|
|
UTF16StringFromExternalMemory(const char16_t* str, size_t len)
|
|
: UTF16String()
|
|
{
|
|
m_bufferData.buffer = str;
|
|
m_bufferData.length = len;
|
|
m_bufferData.hasSpecialImpl = false;
|
|
m_bufferData.has8BitContent = false;
|
|
}
|
|
|
|
virtual bool hasExternalMemory() override
|
|
{
|
|
return true;
|
|
}
|
|
};
|
|
|
|
|
|
inline String* String::fromCharCode(char32_t code)
|
|
{
|
|
if (code < 128) {
|
|
char c = (char)code;
|
|
ASCIIStringData s(&c, 1);
|
|
return new ASCIIString(std::move(s));
|
|
} else if (code <= 0x10000) {
|
|
char16_t c = (char16_t)code;
|
|
UTF16StringData s(&c, 1);
|
|
return new UTF16String(std::move(s));
|
|
} else {
|
|
char16_t buf[3];
|
|
buf[0] = (char16_t)(0xD800 + ((code - 0x10000) >> 10));
|
|
buf[1] = (char16_t)(0xDC00 + ((code - 0x10000) & 1023));
|
|
buf[2] = 0;
|
|
return new UTF16String(buf, 2);
|
|
}
|
|
}
|
|
}
|
|
|
|
namespace std {
|
|
template <>
|
|
struct hash<Escargot::String*> {
|
|
size_t operator()(Escargot::String* const& x) const
|
|
{
|
|
return x->hashValue();
|
|
}
|
|
};
|
|
|
|
template <>
|
|
struct equal_to<Escargot::String*> {
|
|
bool operator()(Escargot::String* const& a, Escargot::String* const& b) const
|
|
{
|
|
return a->equals(b);
|
|
}
|
|
};
|
|
}
|
|
|
|
#include "runtime/RopeString.h"
|
|
#include "runtime/StringBuilder.h"
|
|
#include "runtime/StringView.h"
|
|
|
|
namespace Escargot {
|
|
typedef std::unordered_map<std::string, String*, std::hash<std::string>, std::equal_to<std::string>, GCUtil::gc_malloc_allocator<std::pair<std::string const, String*>>> StringMapStd;
|
|
class StringMap : public StringMapStd, public gc {
|
|
public:
|
|
String* at(const std::string& s) const
|
|
{
|
|
auto iter = find(s);
|
|
if (iter != end()) {
|
|
return iter->second;
|
|
}
|
|
return String::emptyString;
|
|
}
|
|
|
|
void* operator new(size_t size) = delete;
|
|
void* operator new[](size_t size) = delete;
|
|
};
|
|
}
|
|
|
|
#endif
|