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IfcSpfHeader.cpp
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173 lines (150 loc) · 5.65 KB
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/********************************************************************************
* *
* This file is part of IfcOpenShell. *
* *
* IfcOpenShell is free software: you can redistribute it and/or modify *
* it under the terms of the Lesser GNU General Public License as published by *
* the Free Software Foundation, either version 3.0 of the License, or *
* (at your option) any later version. *
* *
* IfcOpenShell is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
* Lesser GNU General Public License for more details. *
* *
* You should have received a copy of the Lesser GNU General Public License *
* along with this program. If not, see <http://www.gnu.org/licenses/>. *
* *
********************************************************************************/
#include "../ifcparse/IfcFile.h"
#include "IfcSpfHeader.h"
static const char * const ISO_10303_21 = "ISO-10303-21";
static const char * const HEADER = "HEADER";
static const char * const FILE_DESCRIPTION = "FILE_DESCRIPTION";
static const char * const FILE_NAME = "FILE_NAME";
static const char * const FILE_SCHEMA = "FILE_SCHEMA";
static const char * const ENDSEC = "ENDSEC";
static const char * const DATA = "DATA";
// The following header entities are not normally encountered in IFC files and are not parsed.
// static const char * const FILE_POPULATION = "FILE_POPULATION";
// static const char * const SECTION_LANGUAGE = "SECTION_LANGUAGE";
// static const char * const SECTION_CONTEXT = "SECTION_CONTEXT";
using namespace IfcParse;
HeaderEntity::HeaderEntity(const char * const datatype, size_t size, IfcFile* file)
: IfcEntityInstanceData(file, size)
, _datatype(datatype)
, size_(size)
{
if (file) {
offset_in_file_ = file->stream->Tell();
load();
}
}
void IfcSpfHeader::readSemicolon() {
if (!TokenFunc::isOperator(file_->tokens->Next(), ';')) {
throw IfcException(std::string("Expected ;"));
}
}
void IfcSpfHeader::readParen() {
if (!TokenFunc::isOperator(file_->tokens->Next(), '(')) {
throw IfcException(std::string("Expected ("));
}
}
void IfcSpfHeader::readTerminal(const std::string& term, Trail trail) {
if (TokenFunc::asStringRef(file_->tokens->Next()) != term) {
throw IfcException(std::string("Expected " + term));
}
if (trail == TRAILING_SEMICOLON) {
readSemicolon();
} else if (trail == TRAILING_PAREN) {
readParen();
}
}
void IfcSpfHeader::read() {
readTerminal(ISO_10303_21, TRAILING_SEMICOLON);
readTerminal(HEADER, TRAILING_SEMICOLON);
// | The header section of every exchange structure shall contain one
// | instance of each of the following entities: file_description, file_name,
// | and file_schema, and they shall appear in that order. Instances of
// | file_population, section_language and section_context may appear after
// | file_schema. If instances of user-defined header section entities are
// | present, they shall appear after the header section entity instances
// | defined in this section.
//
// ISO 10303-21 Second edition 2002-01-15 p. 16
readTerminal(FILE_DESCRIPTION, NONE);
delete _file_description;
_file_description = new FileDescription(file_);
// readSemicolon();
readTerminal(FILE_NAME, NONE);
delete _file_name;
_file_name = new FileName(file_);
// readSemicolon();
readTerminal(FILE_SCHEMA, NONE);
delete _file_schema;
_file_schema = new FileSchema(file_);
// readSemicolon();
}
bool IfcSpfHeader::tryRead() {
try {
read();
return true;
} catch (const std::exception& e) {
Logger::Error(e);
return false;
}
}
void IfcSpfHeader::write(std::ostream& os) const {
os << ISO_10303_21 << ";" << "\n";
os << HEADER << ";" << "\n";
os << file_description().toString(true) << ";" << "\n";
os << file_name().toString(true) << ";" << "\n";
os << file_schema().toString(true) << ";" << "\n";
os << ENDSEC << ";" << "\n";
os << DATA << ";" << "\n";
}
const FileDescription& IfcSpfHeader::file_description() const {
if (_file_description) {
return *_file_description;
} else {
throw IfcException("File description not set");
}
}
const FileName& IfcSpfHeader::file_name() const {
if (_file_name) {
return *_file_name;
} else {
throw IfcException("File name not set");
}
}
const FileSchema& IfcSpfHeader::file_schema() const {
if (_file_schema) {
return *_file_schema;
} else {
throw IfcException("File schema not set");
}
}
FileDescription& IfcSpfHeader::file_description() {
if (_file_description) {
return *_file_description;
} else {
throw IfcException("File description not set");
}
}
FileName& IfcSpfHeader::file_name() {
if (_file_name) {
return *_file_name;
} else {
throw IfcException("File name not set");
}
}
FileSchema& IfcSpfHeader::file_schema() {
if (_file_schema) {
return *_file_schema;
} else {
throw IfcException("File schema not set");
}
}
FileDescription::FileDescription(IfcFile* file) : HeaderEntity(FILE_DESCRIPTION, 2, file) {}
FileName::FileName(IfcFile* file) : HeaderEntity(FILE_NAME, 7, file) {}
FileSchema::FileSchema(IfcFile* file) : HeaderEntity(FILE_SCHEMA, 1, file) {}