mirror of
https://github.com/IfcOpenShell/IfcOpenShell.git
synced 2026-08-09 09:21:46 +00:00
Dion Moult
434 lines
36 KiB
C++
434 lines
36 KiB
C++
/********************************************************************************
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* *
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* This file is part of IfcOpenShell. *
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* *
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* IfcOpenShell is free software: you can redistribute it and/or modify *
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* it under the terms of the Lesser GNU General Public License as published by *
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* the Free Software Foundation, either version 3.0 of the License, or *
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* (at your option) any later version. *
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* *
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* IfcOpenShell 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 *
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* Lesser GNU General Public License for more details. *
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* *
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* You should have received a copy of the Lesser GNU General Public License *
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* along with this program. If not, see <http://www.gnu.org/licenses/>. *
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* *
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********************************************************************************/
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/********************************************************************************
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* *
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* Implementation of character decoding as described in ISO 10303-21 table 2 and *
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* table 4 *
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* *
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********************************************************************************/
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#include "IfcCharacterDecoder.h"
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#include "IfcException.h"
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#include "IfcSpfStream.h"
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#include <codecvt>
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#include <iomanip>
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#include <sstream>
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#include <string>
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#include <algorithm>
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#define FIRST_SOLIDUS (1 << 1)
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#define PAGE (1 << 2)
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#define ALPHABET (1 << 3)
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#define SECOND_SOLIDUS (1 << 4)
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#define ALPHABET_DEFINITION (1 << 5)
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#define APOSTROPHE (1 << 6)
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#define ARBITRARY (1 << 7)
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#define EXTENDED2 (1 << 8)
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#define EXTENDED4 (1 << 9)
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#define HEX(N) (1 << (9 + N))
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#define THIRD_SOLIDUS (1 << 18)
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#define ENDEXTENDED_X (1 << 19)
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#define ENDEXTENDED_0 (1 << 20)
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#define IGNORED_DIRECTIVE (1 << 22)
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#define ENCOUNTERED_HEX (1 << 23)
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// FIXME: These probably need to be less forgiving in terms of wrongly defined sequences
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#define EXPECTS_ALPHABET(S) (S & FIRST_SOLIDUS)
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#define EXPECTS_PAGE(S) (S & FIRST_SOLIDUS)
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#define EXPECTS_ARBITRARY(S) (S & FIRST_SOLIDUS)
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#define EXPECTS_N_OR_F(S) (S & FIRST_SOLIDUS && !(S & ARBITRARY))
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#define EXPECTS_ARBITRARY2(S) (S & ARBITRARY && !(S & SECOND_SOLIDUS))
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#define EXPECTS_ALPHABET_DEFINITION(S) (S & FIRST_SOLIDUS && S & ALPHABET)
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#define EXPECTS_SOLIDUS(S) (S & ALPHABET_DEFINITION || S & PAGE || S & ARBITRARY || S & EXTENDED2 || S & EXTENDED4 || S & ENDEXTENDED_0 || S & IGNORED_DIRECTIVE || (S & EXTENDED4 && S & HEX(8)) || (S & EXTENDED2 && S & HEX(4)))
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#define EXPECTS_CHARACTER(S) (S & PAGE && S & SECOND_SOLIDUS)
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#define EXPECTS_HEX(S) (S & HEX(1) || S & HEX(3) || S & HEX(5) || S & HEX(6) || S & HEX(7) || (S & ARBITRARY && S & SECOND_SOLIDUS) || (S & EXTENDED2 && S & HEX(2)) || (S & EXTENDED4 && S & HEX(4)))
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#define EXPECTS_ENDEXTENDED_X(S) (S & THIRD_SOLIDUS)
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#define EXPECTS_ENDEXTENDED_0(S) (S & ENDEXTENDED_X)
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#define IS_VALID_ALPHABET_DEFINITION(C) (C >= 0x41 && C <= 0x49)
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#define IS_HEXADECIMAL(C) ((C >= 0x30 && C <= 0x39) || (C >= 0x41 && C <= 0x46))
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#define HEX_TO_INT(C) ((C >= 0x30 && C <= 0x39) ? C - 0x30 : (C + 10) - 0x41)
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#define CLEAR_HEX(C) (C &= ~(HEX(1) | HEX(2) | HEX(3) | HEX(4) | HEX(5) | HEX(6) | HEX(7) | HEX(8)))
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using namespace IfcParse;
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using namespace IfcWrite;
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IfcCharacterDecoder::IfcCharacterDecoder(IfcParse::IfcSpfStream* stream) {
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stream_ = stream;
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codepage_ = 0;
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}
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IfcCharacterDecoder::~IfcCharacterDecoder() {
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}
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namespace {
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static unsigned int reference_helper = 0;
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class pure_impure_helper {
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private:
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bool pure_;
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IfcParse::IfcSpfStream* stream_;
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unsigned int& pointer_;
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std::wstring builder_;
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char peek() {
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if (pure_) {
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return stream_->peek_at(pointer_);
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}
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return stream_->Peek();
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}
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unsigned int tell() {
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if (pure_) {
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return pointer_;
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}
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return stream_->Tell();
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}
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void increment() {
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if (pure_) {
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stream_->increment_at(pointer_);
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} else {
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stream_->Inc();
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}
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}
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public:
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pure_impure_helper(IfcParse::IfcSpfStream* stream)
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: pure_(false),
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stream_(stream),
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pointer_(reference_helper) {}
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pure_impure_helper(IfcParse::IfcSpfStream* stream, unsigned int& pointer)
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: pure_(true),
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stream_(stream),
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pointer_(pointer) {}
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std::string get(IfcParse::IfcCharacterDecoder::ConversionMode mode, char substitution_character) {
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unsigned int parse_state = 0;
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builder_.clear();
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builder_.push_back('\'');
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char current_char;
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int codepage = 1;
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unsigned int hex = 0;
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unsigned int hex_count = 0;
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while ((current_char = peek()) != 0) {
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if (EXPECTS_CHARACTER(parse_state)) {
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builder_.push_back(IfcUtil::convert_codepage(codepage, current_char + 0x80));
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parse_state = 0;
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} else if (current_char == '\'' && (parse_state == 0U)) {
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parse_state = APOSTROPHE;
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} else if (current_char == '\\' && (parse_state == 0U)) {
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parse_state = FIRST_SOLIDUS;
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} else if (current_char == '\\' && EXPECTS_SOLIDUS(parse_state)) {
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if (((parse_state & ALPHABET_DEFINITION) != 0U) ||
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((parse_state & IGNORED_DIRECTIVE) != 0U) ||
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((parse_state & ENDEXTENDED_0) != 0U)) {
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parse_state = hex = hex_count = 0;
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} else if ((parse_state & ENCOUNTERED_HEX) != 0U) {
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parse_state += THIRD_SOLIDUS;
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parse_state -= ENCOUNTERED_HEX;
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} else {
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parse_state += SECOND_SOLIDUS;
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}
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} else if (current_char == 'X' && EXPECTS_ENDEXTENDED_X(parse_state)) {
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parse_state += ENDEXTENDED_X;
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} else if (current_char == '0' && EXPECTS_ENDEXTENDED_0(parse_state)) {
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parse_state += ENDEXTENDED_0;
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} else if (current_char == 'X' && EXPECTS_ARBITRARY(parse_state)) {
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parse_state += ARBITRARY;
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} else if (current_char == '2' && EXPECTS_ARBITRARY2(parse_state)) {
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parse_state += EXTENDED2;
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} else if (current_char == '4' && EXPECTS_ARBITRARY2(parse_state)) {
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parse_state += EXTENDED2 + EXTENDED4;
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} else if (current_char == 'P' && EXPECTS_ALPHABET(parse_state)) {
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parse_state += ALPHABET;
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} else if ((current_char == 'N' || current_char == 'F') && EXPECTS_N_OR_F(parse_state)) {
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parse_state += IGNORED_DIRECTIVE;
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} else if (IS_VALID_ALPHABET_DEFINITION(current_char) && EXPECTS_ALPHABET_DEFINITION(parse_state)) {
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codepage = current_char - 0x40;
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parse_state += ALPHABET_DEFINITION;
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} else if (current_char == 'S' && EXPECTS_PAGE(parse_state)) {
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parse_state += PAGE;
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} else if (IS_HEXADECIMAL(current_char) && EXPECTS_HEX(parse_state)) {
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hex <<= 4;
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parse_state += HEX((++hex_count));
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hex += HEX_TO_INT(current_char);
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if ((hex_count == 2 && ((parse_state & EXTENDED2) == 0U)) ||
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(hex_count == 4 && ((parse_state & EXTENDED4) == 0U)) ||
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(hex_count == 8)) {
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builder_.push_back(hex);
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if (hex_count == 2) {
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parse_state = 0;
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} else {
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CLEAR_HEX(parse_state);
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parse_state |= ENCOUNTERED_HEX;
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}
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hex = hex_count = 0;
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}
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} else if ((parse_state != 0U) && !(
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(current_char == '\\' && parse_state == FIRST_SOLIDUS) ||
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(current_char == '\'' && parse_state == APOSTROPHE))) {
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if (parse_state == APOSTROPHE && current_char != '\'') {
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break;
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}
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throw IfcInvalidTokenException(tell(), current_char);
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} else {
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parse_state = hex = hex_count = 0;
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builder_.push_back(current_char);
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}
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increment();
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}
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builder_.push_back('\'');
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if (mode == IfcParse::IfcCharacterDecoder::UTF8) {
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if (builder_.empty()) {
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static std::string empty;
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return empty;
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}
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auto iter = std::max_element(builder_.begin(), builder_.end());
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if (*iter <= 0x7e) {
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std::string result(builder_.begin(), builder_.end());
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return result;
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}
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return IfcUtil::convert_utf8(builder_);
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}
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if (mode == IfcParse::IfcCharacterDecoder::SUBSTITUTE) {
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std::string result;
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result.reserve(builder_.size());
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std::transform(builder_.begin(), builder_.end(), std::back_inserter(result), [&substitution_character](wchar_t character) {
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if (character >= 0x20 && character <= 0x7e) {
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return (char)character;
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}
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return substitution_character;
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});
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return result;
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}
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if (mode == IfcParse::IfcCharacterDecoder::ESCAPE) {
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std::stringstream stream;
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stream << std::hex << std::setw(4) << std::setfill('0');
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std::for_each(builder_.begin(), builder_.end(), [&stream](wchar_t character) {
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if (character >= 0x20 && character <= 0x7e) {
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stream.put((char)character);
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} else {
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stream << "\\u" << character;
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}
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});
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return stream.str();
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}
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throw IfcParse::IfcException("Invalid conversion mode");
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}
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};
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} // namespace
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IfcCharacterDecoder::operator std::string() {
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return pure_impure_helper(stream_).get(mode, substitution_character);
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}
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std::string IfcCharacterDecoder::get(unsigned int& ptr) {
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return pure_impure_helper(stream_, ptr).get(mode, substitution_character);
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}
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void IfcCharacterDecoder::skip() {
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unsigned int parse_state = 0;
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char current_char;
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unsigned int hex_count = 0;
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while ((current_char = stream_->Peek()) != 0) {
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if (EXPECTS_CHARACTER(parse_state)) {
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parse_state = 0;
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} else if (current_char == '\'' && (parse_state == 0U)) {
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parse_state = APOSTROPHE;
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} else if (current_char == '\\' && (parse_state == 0U)) {
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parse_state = FIRST_SOLIDUS;
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} else if (current_char == '\\' && EXPECTS_SOLIDUS(parse_state)) {
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if (((parse_state & ALPHABET_DEFINITION) != 0U) ||
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((parse_state & IGNORED_DIRECTIVE) != 0U) ||
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((parse_state & ENDEXTENDED_0) != 0U)) {
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parse_state = hex_count = 0;
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} else if ((parse_state & ENCOUNTERED_HEX) != 0U) {
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parse_state += THIRD_SOLIDUS;
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parse_state -= ENCOUNTERED_HEX;
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} else {
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parse_state += SECOND_SOLIDUS;
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}
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} else if (current_char == 'X' && EXPECTS_ENDEXTENDED_X(parse_state)) {
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parse_state += ENDEXTENDED_X;
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} else if (current_char == '0' && EXPECTS_ENDEXTENDED_0(parse_state)) {
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parse_state += ENDEXTENDED_0;
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} else if (current_char == 'X' && EXPECTS_ARBITRARY(parse_state)) {
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parse_state += ARBITRARY;
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} else if (current_char == '2' && EXPECTS_ARBITRARY2(parse_state)) {
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parse_state += EXTENDED2;
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} else if (current_char == '4' && EXPECTS_ARBITRARY2(parse_state)) {
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parse_state += EXTENDED2 + EXTENDED4;
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} else if (current_char == 'P' && EXPECTS_ALPHABET(parse_state)) {
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parse_state += ALPHABET;
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} else if ((current_char == 'N' || current_char == 'F') && EXPECTS_N_OR_F(parse_state)) {
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parse_state += IGNORED_DIRECTIVE;
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} else if (IS_VALID_ALPHABET_DEFINITION(current_char) && EXPECTS_ALPHABET_DEFINITION(parse_state)) {
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parse_state += ALPHABET_DEFINITION;
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} else if (current_char == 'S' && EXPECTS_PAGE(parse_state)) {
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parse_state += PAGE;
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} else if (IS_HEXADECIMAL(current_char) && EXPECTS_HEX(parse_state)) {
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parse_state += HEX((++hex_count));
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if ((hex_count == 2 && ((parse_state & EXTENDED2) == 0U)) ||
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(hex_count == 4 && ((parse_state & EXTENDED4) == 0U)) ||
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(hex_count == 8)) {
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if (hex_count == 2) {
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parse_state = 0;
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} else {
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CLEAR_HEX(parse_state);
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parse_state |= ENCOUNTERED_HEX;
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}
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hex_count = 0;
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}
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} else if ((parse_state != 0U) && !(
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(current_char == '\\' && parse_state == FIRST_SOLIDUS) ||
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(current_char == '\'' && parse_state == APOSTROPHE))) {
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if (parse_state == APOSTROPHE && current_char != '\'') {
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break;
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}
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throw IfcInvalidTokenException(stream_->Tell(), current_char);
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} else {
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parse_state = hex_count = 0;
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}
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stream_->Inc();
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}
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}
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IfcCharacterDecoder::ConversionMode IfcCharacterDecoder::mode = IfcCharacterDecoder::UTF8;
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char IfcCharacterDecoder::substitution_character = '_';
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IfcCharacterEncoder::IfcCharacterEncoder(const std::string& input)
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: str_(IfcUtil::convert_utf8_to_utf32(input)) {}
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IfcCharacterEncoder::operator std::string() {
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std::ostringstream oss;
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oss.put('\'');
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// Either 2 or 4 to uses \X2 or \X4 respectively.
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// Currently hardcoded to 4, but \X2 might be
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// sufficient for nearly all purposes.
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const int num_bytes = (str_.empty() || (*std::max_element(str_.begin(), str_.end()) > 0xffff)) ? 4 : 2;
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const std::string num_bytes_str = std::string(1, num_bytes + 0x30);
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bool in_extended = false;
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for (auto it = str_.begin(); it != str_.end(); ++it) {
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auto character = *it;
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const bool within_spf_range = character >= 0x20 && character <= 0x7e;
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if (in_extended && within_spf_range) {
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oss << "\\X0\\";
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} else if (!in_extended && !within_spf_range) {
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oss << "\\X" << num_bytes_str << "\\";
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}
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if (within_spf_range) {
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oss.put((char)character);
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if (character == '\\' || character == '\'') {
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oss.put((char)character);
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}
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} else {
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oss << std::hex << std::setw(num_bytes * 2) << std::uppercase << std::setfill('0') << (int)character;
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}
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in_extended = !within_spf_range;
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}
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if (in_extended) {
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oss << "\\X0\\";
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}
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oss.put('\'');
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return oss.str();
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}
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/*
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Generate with:
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import codecs, string
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codecs.register_error('zero', lambda e: (chr(0),e.start + 1))
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def _():
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for i in range(1,17):
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try:
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chrs = bytes(range(256)).decode('iso-8859-%d' % i, errors='zero')
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except: chrs = "\x00" * 256
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yield str(list(map(ord, chrs))).translate(string.maketrans("[]", "{}"))
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"{%s}" % ",".join(_())
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*/
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std::wstring::value_type IfcUtil::convert_codepage(int codepage, int character) {
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if (codepage < 1 || codepage > 16 || codepage == 12) {
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throw IfcParse::IfcException("Invalid codepage");
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}
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if (character < 0 || character > 255) {
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throw IfcParse::IfcException("Invalid character ordinal");
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}
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// NOLINTBEGIN(readability-magic-numbers)
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static std::array<std::array<wchar_t, 256>, 16> codepage_data = {{{{0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, 128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143, 144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159, 160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175, 176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 191, 192, 193, 194, 195, 196, 197, 198, 199, 200, 201, 202, 203, 204, 205, 206, 207, 208, 209, 210, 211, 212, 213, 214, 215, 216, 217, 218, 219, 220, 221, 222, 223, 224, 225, 226, 227, 228, 229, 230, 231, 232, 233, 234, 235, 236, 237, 238, 239, 240, 241, 242, 243, 244, 245, 246, 247, 248, 249, 250, 251, 252, 253, 254, 255}},
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|
|
// NOLINTEND(readability-magic-numbers)
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auto result = codepage_data[codepage - 1][character];
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if (result == 0) {
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throw IfcParse::IfcException("Character not defined");
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}
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return result;
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}
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std::string IfcUtil::convert_utf8(const std::wstring& string) {
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return std::wstring_convert<std::codecvt_utf8<std::wstring::value_type>>().to_bytes(string);
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}
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std::wstring IfcUtil::convert_utf8(const std::string& string) {
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return std::wstring_convert<std::codecvt_utf8<std::wstring::value_type>>().from_bytes(string);
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}
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|
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#ifdef _MSC_VER
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// bug in msvc 2015 and 2017, unsure if fixed in later versions
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|
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std::u32string IfcUtil::convert_utf8_to_utf32(const std::string& s) {
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|
auto converted = std::wstring_convert<std::codecvt_utf8<int32_t>, int32_t>().from_bytes(s);
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|
return std::u32string(reinterpret_cast<char32_t const*>(converted.data()));
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|
}
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|
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#else
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|
|
|
std::u32string IfcUtil::convert_utf8_to_utf32(const std::string& string) {
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|
return std::wstring_convert<std::codecvt_utf8<std::u32string::value_type>, std::u32string::value_type>().from_bytes(string);
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|
}
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|
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#endif
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