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- /***************************************************************************
- *
- * Project _____ __ ____ _ _
- * ( _ ) /__\ (_ _)_| |_ _| |_
- * )(_)( /(__)\ )( (_ _)(_ _)
- * (_____)(__)(__)(__) |_| |_|
- *
- *
- * Copyright 2018-present, Leonid Stryzhevskyi <lganzzzo@gmail.com>
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * 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.
- *
- ***************************************************************************/
- #include "Utils.hpp"
- #include "oatpp/encoding/Unicode.hpp"
- #include "oatpp/encoding/Hex.hpp"
- namespace oatpp { namespace parser { namespace json{
- v_buff_size Utils::calcEscapedStringSize(const char* data, v_buff_size size, v_buff_size& safeSize, v_uint32 flags) {
- v_buff_size result = 0;
- v_buff_size i = 0;
- safeSize = size;
- while (i < size) {
- v_char8 a = data[i];
- if(a < 32) {
- i ++;
- switch (a) {
- case '\b':
- case '\f':
- case '\n':
- case '\r':
- case '\t': result += 2; break; // '\n'
- default:
- result += 6; // '\uFFFF' - 6 chars
- break;
- }
- } else if(a < 128){
- i ++;
- switch (a) {
- case '\"':
- case '\\': result += 2; break; // '\/'
- case '/':
- result ++;
- if((flags & FLAG_ESCAPE_SOLIDUS) > 0) result ++;
- break;
- default:
- result ++;
- break;
- }
- } else {
- v_buff_size charSize = oatpp::encoding::Unicode::getUtf8CharSequenceLength(a);
- if(charSize != 0) {
- if(i + charSize > size) {
- safeSize = i;
- }
- i += charSize;
- if(charSize < 4) {
- result += 6; // '\uFFFF' - 6 chars
- } else if(charSize == 4) {
- result += 12; // '\uFFFF\uFFFF' - 12 chars surrogate pair
- } else {
- result += 11; // '\u+FFFFFFFF' - 11 chars NOT JSON standard case
- }
- } else {
- // invalid char
- i ++;
- result ++;
- }
- }
- }
- return result;
- }
- v_buff_size Utils::calcUnescapedStringSize(const char* data, v_buff_size size, v_int64& errorCode, v_buff_size& errorPosition) {
- errorCode = 0;
- v_buff_size result = 0;
- v_buff_size i = 0;
-
- while (i < size) {
- v_char8 a = data[i];
- if(a == '\\'){
-
- if(i + 1 == size){
- errorCode = ERROR_CODE_INVALID_ESCAPED_CHAR;
- errorPosition = i;
- return 0;
- }
-
- v_char8 b = data[i + 1];
-
- if(b == '"' || b == '\\' || b == '/' || b == 'b' || b == 'f' || b == 'n' || b == 'r' || b == 't'){
- result += 1;
- i += 2;
- } else if(b == 'u'){
-
- if(i + 6 > size){
- errorCode = ERROR_CODE_INVALID_ESCAPED_CHAR;
- errorPosition = i;
- return 0;
- }
-
- if(data[i + 2] == '+') { // not JSON standard case
- if(i + 11 > size){
- errorCode = ERROR_CODE_INVALID_ESCAPED_CHAR;
- errorPosition = i;
- return 0;
- }
- v_uint32 code;
- errorCode = encoding::Hex::readUInt32(&data[i + 3], code);
- if(errorCode != 0){
- errorPosition = i + 3;
- return 0;
- }
- i += 11;
- result += encoding::Unicode::getUtf8CharSequenceLengthForCode(code);
- } else {
- v_uint16 code;
- errorCode = encoding::Hex::readUInt16(&data[i + 2], code);
- if(errorCode != 0){
- errorPosition = i + 2;
- return 0;
- }
-
- if(code >= 0xD800 && code <= 0xDBFF){
- if(i + 12 > size){
- errorCode = ERROR_CODE_INVALID_SURROGATE_PAIR;
- errorPosition = i;
- return 0;
- }
- v_uint16 low;
- errorCode = encoding::Hex::readUInt16(&data[i + 8], low);
- if(errorCode != 0){
- errorPosition = i + 8;
- return 0;
- }
-
- if(low >= 0xDC00 && low <= 0xDFFF){
- v_uint32 bigCode = encoding::Unicode::utf16SurrogatePairToCode(code, low);
- i += 12;
- result += encoding::Unicode::getUtf8CharSequenceLengthForCode(bigCode);
- } else {
- errorCode = ERROR_CODE_INVALID_SURROGATE_PAIR;
- errorPosition = i;
- return 0;
- }
-
- } else {
- i += 6;
- result += encoding::Unicode::getUtf8CharSequenceLengthForCode(code);
- }
- }
-
- } else {
- errorCode = ERROR_CODE_INVALID_ESCAPED_CHAR;
- errorPosition = i;
- return 0;
- }
-
- } else {
- i ++;
- result ++;
- }
-
- }
-
- return result;
- }
-
- v_buff_size Utils::escapeUtf8Char(const char* sequence, p_char8 buffer){
- v_buff_size length;
- v_int32 code = oatpp::encoding::Unicode::encodeUtf8Char(sequence, length);
- if(code < 0x00010000) {
- buffer[0] = '\\';
- buffer[1] = 'u';
- oatpp::encoding::Hex::writeUInt16(v_uint16(code), &buffer[2]);
- return 6;
- } else if(code < 0x00200000) {
- v_int16 high;
- v_int16 low;
- oatpp::encoding::Unicode::codeToUtf16SurrogatePair(code, high, low);
- buffer[0] = '\\';
- buffer[1] = 'u';
- oatpp::encoding::Hex::writeUInt16(high, &buffer[2]);
- buffer[6] = '\\';
- buffer[7] = 'u';
- oatpp::encoding::Hex::writeUInt16(low, &buffer[8]);
- return 12;
- } else {
- buffer[0] = '\\';
- buffer[1] = 'u';
- buffer[2] = '+';
- oatpp::encoding::Hex::writeUInt32(code, &buffer[2]);
- return 11;
- }
- }
- oatpp::String Utils::escapeString(const char* data, v_buff_size size, v_uint32 flags) {
- v_buff_size safeSize;
- v_buff_size escapedSize = calcEscapedStringSize(data, size, safeSize, flags);
- if(escapedSize == size) {
- return String((const char*)data, size);
- }
- auto result = String(escapedSize);
- p_char8 resultData = (p_char8) result->data();
- v_buff_size pos = 0;
- {
- v_buff_size i = 0;
- while (i < safeSize) {
- v_char8 a = data[i];
- if (a < 32) {
- switch (a) {
- case '\b': resultData[pos] = '\\'; resultData[pos + 1] = 'b'; pos += 2; break;
- case '\f': resultData[pos] = '\\'; resultData[pos + 1] = 'f'; pos += 2; break;
- case '\n': resultData[pos] = '\\'; resultData[pos + 1] = 'n'; pos += 2; break;
- case '\r': resultData[pos] = '\\'; resultData[pos + 1] = 'r'; pos += 2; break;
- case '\t': resultData[pos] = '\\'; resultData[pos + 1] = 't'; pos += 2; break;
- default:
- resultData[pos] = '\\';
- resultData[pos + 1] = 'u';
- oatpp::encoding::Hex::writeUInt16(a, &resultData[pos + 2]);
- pos += 6;
- break;
- }
- i++;
- }
- else if (a < 128) {
- switch (a) {
- case '\"': resultData[pos] = '\\'; resultData[pos + 1] = '"'; pos += 2; break;
- case '\\': resultData[pos] = '\\'; resultData[pos + 1] = '\\'; pos += 2; break;
- case '/':
- if((flags & FLAG_ESCAPE_SOLIDUS) > 0) {
- resultData[pos] = '\\';
- resultData[pos + 1] = '/';
- pos += 2;
- } else {
- resultData[pos] = data[i];
- pos++;
- }
- break;
- default:
- resultData[pos] = data[i];
- pos++;
- break;
- }
- i++;
- }
- else {
- v_buff_size charSize = oatpp::encoding::Unicode::getUtf8CharSequenceLength(a);
- if (charSize != 0) {
- pos += escapeUtf8Char(&data[i], &resultData[pos]);
- i += charSize;
- }
- else {
- // invalid char
- resultData[pos] = data[i];
- i++;
- pos++;
- }
- }
- }
- }
-
- if(size > safeSize){
- for(v_buff_size i = pos; i < result->size(); i ++){
- resultData[i] = '?';
- }
- }
-
- return result;
- }
- void Utils::unescapeStringToBuffer(const char* data, v_buff_size size, p_char8 resultData){
-
- v_buff_size i = 0;
- v_buff_size pos = 0;
-
- while (i < size) {
- v_char8 a = data[i];
-
- if(a == '\\'){
- v_char8 b = data[i + 1];
- if(b != 'u'){
- switch (b) {
- case '"': resultData[pos] = '"'; pos ++; break;
- case '\\': resultData[pos] = '\\'; pos ++; break;
- case '/': resultData[pos] = '/'; pos ++; break;
- case 'b': resultData[pos] = '\b'; pos ++; break;
- case 'f': resultData[pos] = '\f'; pos ++; break;
- case 'n': resultData[pos] = '\n'; pos ++; break;
- case 'r': resultData[pos] = '\r'; pos ++; break;
- case 't': resultData[pos] = '\t'; pos ++; break;
- }
- i += 2;
- } else {
- if(data[i + 2] == '+'){ // Not JSON standard case
- v_uint32 code;
- encoding::Hex::readUInt32(&data[i + 3], code);
- i += 11;
- pos += encoding::Unicode::decodeUtf8Char(code, &resultData[pos]);
- } else {
-
- v_uint16 code;
- encoding::Hex::readUInt16(&data[i + 2], code);
-
- if(code >= 0xD800 && code <= 0xDBFF){
- v_uint16 low;
- encoding::Hex::readUInt16(&data[i + 8], low);
- v_uint32 bigCode = encoding::Unicode::utf16SurrogatePairToCode(code, low);
- pos += encoding::Unicode::decodeUtf8Char(bigCode, &resultData[pos]);
- i += 12;
- } else {
- pos += encoding::Unicode::decodeUtf8Char(code, &resultData[pos]);
- i += 6;
- }
-
- }
- }
- } else {
- resultData[pos] = a;
- pos ++;
- i++;
- }
-
- }
-
- }
-
- oatpp::String Utils::unescapeString(const char* data, v_buff_size size, v_int64& errorCode, v_buff_size& errorPosition) {
-
- v_buff_size unescapedSize = calcUnescapedStringSize(data, size, errorCode, errorPosition);
- if(errorCode != 0){
- return nullptr;
- }
- auto result = String(unescapedSize);
- if(unescapedSize == size) {
- std::memcpy((void*) result->data(), data, size);
- } else {
- unescapeStringToBuffer(data, size, (p_char8) result->data());
- }
- return result;
-
- }
-
- std::string Utils::unescapeStringToStdString(const char* data, v_buff_size size, v_int64& errorCode, v_buff_size& errorPosition){
-
- v_buff_size unescapedSize = calcUnescapedStringSize(data, size, errorCode, errorPosition);
- if(errorCode != 0){
- return "";
- }
- std::string result;
- result.resize(unescapedSize);
- if(unescapedSize == size) {
- std::memcpy((p_char8) result.data(), data, size);
- } else {
- unescapeStringToBuffer(data, size, (p_char8) result.data());
- }
- return result;
-
- }
-
- const char* Utils::preparseString(ParsingCaret& caret, v_buff_size& size){
-
- if(caret.canContinueAtChar('"', 1)){
-
- const char* data = caret.getData();
- v_buff_size pos = caret.getPosition();
- v_buff_size pos0 = pos;
- v_buff_size length = caret.getDataSize();
-
- while (pos < length) {
- v_char8 a = data[pos];
- if(a == '"'){
- size = pos - pos0;
- return &data[pos0];
- } else if(a == '\\') {
- pos += 2;
- } else {
- pos ++;
- }
- }
- caret.setPosition(caret.getDataSize());
- caret.setError("[oatpp::parser::json::Utils::preparseString()]: Error. '\"' - expected", ERROR_CODE_PARSER_QUOTE_EXPECTED);
- } else {
- caret.setError("[oatpp::parser::json::Utils::preparseString()]: Error. '\"' - expected", ERROR_CODE_PARSER_QUOTE_EXPECTED);
- }
-
- return nullptr;
-
- }
-
- oatpp::String Utils::parseString(ParsingCaret& caret) {
-
- v_buff_size size;
- const char* data = preparseString(caret, size);
-
- if(data != nullptr) {
-
- v_buff_size pos = caret.getPosition();
-
- v_int64 errorCode;
- v_buff_size errorPosition;
- auto result = unescapeString(data, size, errorCode, errorPosition);
- if(errorCode != 0){
- caret.setError("[oatpp::parser::json::Utils::parseString()]: Error. Call to unescapeString() failed", errorCode);
- caret.setPosition(pos + errorPosition);
- } else {
- caret.setPosition(pos + size + 1);
- }
-
- return result;
-
- }
-
- return nullptr;
-
- }
-
- std::string Utils::parseStringToStdString(ParsingCaret& caret){
-
- v_buff_size size;
- auto data = preparseString(caret, size);
-
- if(data != nullptr) {
-
- v_buff_size pos = caret.getPosition();
-
- v_int64 errorCode;
- v_buff_size errorPosition;
- const std::string& result = unescapeStringToStdString(data, size, errorCode, errorPosition);
- if(errorCode != 0){
- caret.setError("[oatpp::parser::json::Utils::parseStringToStdString()]: Error. Call to unescapeStringToStdString() failed", errorCode);
- caret.setPosition(pos + errorPosition);
- } else {
- caret.setPosition(pos + size + 1);
- }
-
- return result;
-
- }
-
- return "";
-
- }
- bool Utils::findDecimalSeparatorInCurrentNumber(ParsingCaret& caret) {
- parser::Caret::StateSaveGuard stateGuard(caret);
- // search until a decimal separator is found or no more digits are found or no more data available
- while(caret.canContinue()) {
- if (caret.isAtChar(JSON_DECIMAL_SEPARATOR)) {
- return true;
- }
- if (!caret.isAtDigitChar()) {
- return false;
- }
- caret.inc();
- }
- return false;
- }
-
- }}}
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