1/*
2 * Copyright (c) 2021 Huawei Device Co., Ltd.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at
6 *
7 *     http://www.apache.org/licenses/LICENSE-2.0
8 *
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
14 */
15
16#ifndef ECMASCRIPT_MEM_C_STRING_H
17#define ECMASCRIPT_MEM_C_STRING_H
18
19#include <sstream>
20#include <string>
21#include <string_view>
22
23#include "ecmascript/common.h"
24#include "ecmascript/mem/caddress_allocator.h"
25
26namespace panda::ecmascript {
27class EcmaString;
28class JSTaggedValue;
29
30using CString = std::basic_string<char, std::char_traits<char>, CAddressAllocator<char>>;
31using CS16tring = std::basic_string<char16_t, std::char_traits<char16_t>, CAddressAllocator<char16_t>>;
32using CStringStream = std::basic_stringstream<char, std::char_traits<char>, CAddressAllocator<char>>;
33
34struct CStringHash {
35    using argument_type = panda::ecmascript::CString;
36    using result_type = std::size_t;
37
38    size_t operator()(const CString &str) const noexcept
39    {
40        return std::hash<std::string_view>()(std::string_view(str.data(), str.size()));
41    }
42};
43
44constexpr int BASE = 10;
45
46// PRINT will skip '\0' in utf16 during conversion of utf8
47enum StringConvertedUsage { PRINT, LOGICOPERATION };
48
49long CStringToL(const CString &str);
50int64_t CStringToLL(const CString &str);
51uint64_t CStringToULL(const CString &str);
52float CStringToF(const CString &str);
53double CStringToD(const CString &str);
54
55CString ConvertToString(const std::string &str);
56std::string PUBLIC_API ConvertToStdString(const CString &str);
57
58// '\u0000' is skip according to holdZero
59// cesu8 means non-BMP1 codepoints should encode as 1 utf8 string
60CString PUBLIC_API ConvertToString(const ecmascript::EcmaString *s,
61    StringConvertedUsage usage = StringConvertedUsage::PRINT, bool cesu8 = false);
62CString ConvertToString(ecmascript::JSTaggedValue key);
63
64template<class T>
65std::enable_if_t<std::is_floating_point_v<T>, CString> FloatToCString(T number)
66{
67    CStringStream strStream;
68    strStream << number;
69    return strStream.str();
70}
71
72template<class T>
73std::enable_if_t<std::is_integral_v<T>, CString> ToCString(T number)
74{
75    static constexpr uint32_t BUFF_SIZE = std::numeric_limits<T>::digits10 + 3;  // 3: Reserved for sign bit and '\0'.
76    int64_t n = static_cast<int64_t>(number);
77    char buf[BUFF_SIZE];
78    uint32_t position = BUFF_SIZE - 1;
79    buf[position] = '\0';
80    bool isNeg = true;
81    if (n >= 0) {
82        n = -n;
83        isNeg = false;
84    }
85    do {
86        buf[--position] = static_cast<int8_t>('0' - (n % 10)); // 10 : decimal
87        n /= 10; // 10 : decimal
88    } while (n);
89    if (isNeg) {
90        buf[--position] = '-';
91    }
92    return CString(&buf[position]);
93}
94}  // namespace panda::ecmascript
95
96namespace std {
97template <>
98struct hash<panda::ecmascript::CString> {
99    using argument_type = panda::ecmascript::CStringHash::argument_type;
100    using result_type = panda::ecmascript::CStringHash::result_type;
101
102    size_t operator()(const panda::ecmascript::CString &str) const noexcept
103    {
104        return panda::ecmascript::CStringHash()(str);
105    }
106};
107}  // namespace std
108
109#endif  // ECMASCRIPT_MEM_C_STRING_H
110