// Tencent is pleased to support the open source community by making RapidJSON available. // // Copyright (C) 2015 THL A29 Limited, a Tencent company, and Milo Yip. All rights reserved. // // Licensed under the MIT License (the "License"); you may not use this file except // in compliance with the License. You may obtain a copy of the License at // // http://opensource.org/licenses/MIT // // Unless required by applicable law or agreed to in writing, software distributed // under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR // CONDITIONS OF ANY KIND, either express or implied. See the License for the // specific language governing permissions and limitations under the License. #ifndef RAPIDJSON_ITOA_ #define RAPIDJSON_ITOA_ #include "../rapidjson.h" RAPIDJSON_NAMESPACE_BEGIN namespace internal { inline const char* GetDigitsLut() { static const char cDigitsLut[200] = { '0','0','0','1','0','2','0','3','0','4','0','5','0','6','0','7','0','8','0','9', '1','0','1','1','1','2','1','3','1','4','1','5','1','6','1','7','1','8','1','9', '2','0','2','1','2','2','2','3','2','4','2','5','2','6','2','7','2','8','2','9', '3','0','3','1','3','2','3','3','3','4','3','5','3','6','3','7','3','8','3','9', '4','0','4','1','4','2','4','3','4','4','4','5','4','6','4','7','4','8','4','9', '5','0','5','1','5','2','5','3','5','4','5','5','5','6','5','7','5','8','5','9', '6','0','6','1','6','2','6','3','6','4','6','5','6','6','6','7','6','8','6','9', '7','0','7','1','7','2','7','3','7','4','7','5','7','6','7','7','7','8','7','9', '8','0','8','1','8','2','8','3','8','4','8','5','8','6','8','7','8','8','8','9', '9','0','9','1','9','2','9','3','9','4','9','5','9','6','9','7','9','8','9','9' }; return cDigitsLut; } inline char* u32toa(uint32_t value, char* buffer) { const char* cDigitsLut = GetDigitsLut(); if (value < 10000) { const uint32_t d1 = (value / 100) << 1; const uint32_t d2 = (value % 100) << 1; if (value >= 1000) *buffer++ = cDigitsLut[d1]; if (value >= 100) *buffer++ = cDigitsLut[d1 + 1]; if (value >= 10) *buffer++ = cDigitsLut[d2]; *buffer++ = cDigitsLut[d2 + 1]; } else if (value < 100000000) { // value = bbbbcccc const uint32_t b = value / 10000; const uint32_t c = value % 10000; const uint32_t d1 = (b / 100) << 1; const uint32_t d2 = (b % 100) << 1; const uint32_t d3 = (c / 100) << 1; const uint32_t d4 = (c % 100) << 1; if (value >= 10000000) *buffer++ = cDigitsLut[d1]; if (value >= 1000000) *buffer++ = cDigitsLut[d1 + 1]; if (value >= 100000) *buffer++ = cDigitsLut[d2]; *buffer++ = cDigitsLut[d2 + 1]; *buffer++ = cDigitsLut[d3]; *buffer++ = cDigitsLut[d3 + 1]; *buffer++ = cDigitsLut[d4]; *buffer++ = cDigitsLut[d4 + 1]; } else { // value = aabbbbcccc in decimal const uint32_t a = value / 100000000; // 1 to 42 value %= 100000000; if (a >= 10) { const unsigned i = a << 1; *buffer++ = cDigitsLut[i]; *buffer++ = cDigitsLut[i + 1]; } else *buffer++ = static_cast<char>('0' + static_cast<char>(a)); const uint32_t b = value / 10000; // 0 to 9999 const uint32_t c = value % 10000; // 0 to 9999 const uint32_t d1 = (b / 100) << 1; const uint32_t d2 = (b % 100) << 1; const uint32_t d3 = (c / 100) << 1; const uint32_t d4 = (c % 100) << 1; *buffer++ = cDigitsLut[d1]; *buffer++ = cDigitsLut[d1 + 1]; *buffer++ = cDigitsLut[d2]; *buffer++ = cDigitsLut[d2 + 1]; *buffer++ = cDigitsLut[d3]; *buffer++ = cDigitsLut[d3 + 1]; *buffer++ = cDigitsLut[d4]; *buffer++ = cDigitsLut[d4 + 1]; } return buffer; } inline char* i32toa(int32_t value, char* buffer) { uint32_t u = static_cast<uint32_t>(value); if (value < 0) { *buffer++ = '-'; u = ~u + 1; } return u32toa(u, buffer); } inline char* u64toa(uint64_t value, char* buffer) { const char* cDigitsLut = GetDigitsLut(); const uint64_t kTen8 = 100000000; const uint64_t kTen9 = kTen8 * 10; const uint64_t kTen10 = kTen8 * 100; const uint64_t kTen11 = kTen8 * 1000; const uint64_t kTen12 = kTen8 * 10000; const uint64_t kTen13 = kTen8 * 100000; const uint64_t kTen14 = kTen8 * 1000000; const uint64_t kTen15 = kTen8 * 10000000; const uint64_t kTen16 = kTen8 * kTen8; if (value < kTen8) { uint32_t v = static_cast<uint32_t>(value); if (v < 10000) { const uint32_t d1 = (v / 100) << 1; const uint32_t d2 = (v % 100) << 1; if (v >= 1000) *buffer++ = cDigitsLut[d1]; if (v >= 100) *buffer++ = cDigitsLut[d1 + 1]; if (v >= 10) *buffer++ = cDigitsLut[d2]; *buffer++ = cDigitsLut[d2 + 1]; } else { // value = bbbbcccc const uint32_t b = v / 10000; const uint32_t c = v % 10000; const uint32_t d1 = (b / 100) << 1; const uint32_t d2 = (b % 100) << 1; const uint32_t d3 = (c / 100) << 1; const uint32_t d4 = (c % 100) << 1; if (value >= 10000000) *buffer++ = cDigitsLut[d1]; if (value >= 1000000) *buffer++ = cDigitsLut[d1 + 1]; if (value >= 100000) *buffer++ = cDigitsLut[d2]; *buffer++ = cDigitsLut[d2 + 1]; *buffer++ = cDigitsLut[d3]; *buffer++ = cDigitsLut[d3 + 1]; *buffer++ = cDigitsLut[d4]; *buffer++ = cDigitsLut[d4 + 1]; } } else if (value < kTen16) { const uint32_t v0 = static_cast<uint32_t>(value / kTen8); const uint32_t v1 = static_cast<uint32_t>(value % kTen8); const uint32_t b0 = v0 / 10000; const uint32_t c0 = v0 % 10000; const uint32_t d1 = (b0 / 100) << 1; const uint32_t d2 = (b0 % 100) << 1; const uint32_t d3 = (c0 / 100) << 1; const uint32_t d4 = (c0 % 100) << 1; const uint32_t b1 = v1 / 10000; const uint32_t c1 = v1 % 10000; const uint32_t d5 = (b1 / 100) << 1; const uint32_t d6 = (b1 % 100) << 1; const uint32_t d7 = (c1 / 100) << 1; const uint32_t d8 = (c1 % 100) << 1; if (value >= kTen15) *buffer++ = cDigitsLut[d1]; if (value >= kTen14) *buffer++ = cDigitsLut[d1 + 1]; if (value >= kTen13) *buffer++ = cDigitsLut[d2]; if (value >= kTen12) *buffer++ = cDigitsLut[d2 + 1]; if (value >= kTen11) *buffer++ = cDigitsLut[d3]; if (value >= kTen10) *buffer++ = cDigitsLut[d3 + 1]; if (value >= kTen9) *buffer++ = cDigitsLut[d4]; if (value >= kTen8) *buffer++ = cDigitsLut[d4 + 1]; *buffer++ = cDigitsLut[d5]; *buffer++ = cDigitsLut[d5 + 1]; *buffer++ = cDigitsLut[d6]; *buffer++ = cDigitsLut[d6 + 1]; *buffer++ = cDigitsLut[d7]; *buffer++ = cDigitsLut[d7 + 1]; *buffer++ = cDigitsLut[d8]; *buffer++ = cDigitsLut[d8 + 1]; } else { const uint32_t a = static_cast<uint32_t>(value / kTen16); // 1 to 1844 value %= kTen16; if (a < 10) *buffer++ = static_cast<char>('0' + static_cast<char>(a)); else if (a < 100) { const uint32_t i = a << 1; *buffer++ = cDigitsLut[i]; *buffer++ = cDigitsLut[i + 1]; } else if (a < 1000) { *buffer++ = static_cast<char>('0' + static_cast<char>(a / 100)); const uint32_t i = (a % 100) << 1; *buffer++ = cDigitsLut[i]; *buffer++ = cDigitsLut[i + 1]; } else { const uint32_t i = (a / 100) << 1; const uint32_t j = (a % 100) << 1; *buffer++ = cDigitsLut[i]; *buffer++ = cDigitsLut[i + 1]; *buffer++ = cDigitsLut[j]; *buffer++ = cDigitsLut[j + 1]; } const uint32_t v0 = static_cast<uint32_t>(value / kTen8); const uint32_t v1 = static_cast<uint32_t>(value % kTen8); const uint32_t b0 = v0 / 10000; const uint32_t c0 = v0 % 10000; const uint32_t d1 = (b0 / 100) << 1; const uint32_t d2 = (b0 % 100) << 1; const uint32_t d3 = (c0 / 100) << 1; const uint32_t d4 = (c0 % 100) << 1; const uint32_t b1 = v1 / 10000; const uint32_t c1 = v1 % 10000; const uint32_t d5 = (b1 / 100) << 1; const uint32_t d6 = (b1 % 100) << 1; const uint32_t d7 = (c1 / 100) << 1; const uint32_t d8 = (c1 % 100) << 1; *buffer++ = cDigitsLut[d1]; *buffer++ = cDigitsLut[d1 + 1]; *buffer++ = cDigitsLut[d2]; *buffer++ = cDigitsLut[d2 + 1]; *buffer++ = cDigitsLut[d3]; *buffer++ = cDigitsLut[d3 + 1]; *buffer++ = cDigitsLut[d4]; *buffer++ = cDigitsLut[d4 + 1]; *buffer++ = cDigitsLut[d5]; *buffer++ = cDigitsLut[d5 + 1]; *buffer++ = cDigitsLut[d6]; *buffer++ = cDigitsLut[d6 + 1]; *buffer++ = cDigitsLut[d7]; *buffer++ = cDigitsLut[d7 + 1]; *buffer++ = cDigitsLut[d8]; *buffer++ = cDigitsLut[d8 + 1]; } return buffer; } inline char* i64toa(int64_t value, char* buffer) { uint64_t u = static_cast<uint64_t>(value); if (value < 0) { *buffer++ = '-'; u = ~u + 1; } return u64toa(u, buffer); } } // namespace internal RAPIDJSON_NAMESPACE_END #endif // RAPIDJSON_ITOA_