mirror of
https://github.com/IfcOpenShell/IfcOpenShell.git
synced 2026-08-11 02:02:22 +00:00
Thomas Krijnen
d02eeac132
Speed up type checking by using std::maps and switch statements Add compile flag to win/IfcGeom.vcproj
288 lines
8.8 KiB
C++
288 lines
8.8 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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* This file provides functions for loading an IFC file into memory and access *
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* its entities either by ID, by an Ifc2x3::Type or by reference *
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* *
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********************************************************************************/
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#ifndef IFCPARSE_H
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#define IFCPARSE_H
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#include <string>
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#include <sstream>
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#include <iostream>
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#include <vector>
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#include <fstream>
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#include <cstring>
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#include <map>
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#include <exception>
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#include "../ifcparse/SharedPointer.h"
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#include "../ifcparse/IfcUtil.h"
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#include "../ifcparse/Ifc2x3.h"
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const int BUF_SIZE = (32 * 1024 * 1024);
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namespace IfcParse {
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class Entity;
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class Entities;
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typedef Entity* EntityPtr;
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typedef SHARED_PTR<Entities> EntitiesPtr;
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//
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// Reads a file in chunks of BUF_SIZE and provides
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// functions to randomly access its contents
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//
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class File {
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private:
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std::ifstream stream;
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char* buffer;
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unsigned int ptr;
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unsigned int len;
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unsigned int offset;
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void ReadBuffer(bool inc=true);
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bool paging;
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public:
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bool valid;
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bool eof;
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unsigned int size;
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File(const std::string& fn);
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File(std::istream& f, int len);
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char Peek();
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char Read(unsigned int offset);
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void Inc();
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void Close();
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void Seek(unsigned int offset);
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unsigned int Tell();
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};
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typedef unsigned int Token;
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//
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// Provides functions to convert Tokens to binary data
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// Tokens are merely offsets to where they can be read in the file
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//
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class TokenFunc {
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private:
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static bool startsWith(Token t, char c);
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public:
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static unsigned int Offset(Token t);
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static bool isString(Token t);
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static bool isIdentifier(Token t);
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static bool isOperator(Token t, char op = 0);
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static bool isEnumeration(Token t);
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static bool isDatatype(Token t);
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static int asInt(Token t);
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static bool asBool(Token t);
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static float asFloat(Token t);
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static std::string asString(Token t);
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static std::string toString(Token t);
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};
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//
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// Functions for creating Tokens from an arbitary file offset
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// The first 4 bits are reserved for Tokens of type ()=,;$*
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//
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Token TokenPtr(unsigned int offset);
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Token TokenPtr(char c);
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Token TokenPtr();
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//
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// Interprets a file as a sequential stream of Tokens
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//
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class Tokens {
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private:
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File* file;
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public:
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Tokens(File* f);
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Token Next();
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std::string TokenString(unsigned int offset);
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};
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//
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// Argument of type list, e.g.
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// #1=IfcDirection((1.,0.,0.));
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// ==========
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//
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class ArgumentList: public Argument {
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private:
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std::vector<ArgumentPtr> list;
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void Push(ArgumentPtr l);
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public:
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ArgumentList(Tokens* t, std::vector<unsigned int>& ids);
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~ArgumentList();
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operator int() const;
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operator bool() const;
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operator float() const;
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operator std::string() const;
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operator std::vector<float>() const;
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operator std::vector<int>() const;
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operator std::vector<std::string>() const;
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operator IfcUtil::IfcSchemaEntity() const;
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//operator IfcUtil::IfcAbstractSelect::ptr() const;
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operator IfcEntities() const;
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unsigned int Size() const;
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ArgumentPtr operator [] (unsigned int i) const;
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std::string toString() const;
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bool isNull() const;
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};
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//
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// Argument of type scalar or string, e.g.
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// #1=IfcVector(#2,1.0);
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// == ===
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//
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class TokenArgument : public Argument {
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private:
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Token token;
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public:
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TokenArgument(Token t);
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operator int() const;
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operator bool() const;
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operator float() const;
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operator std::string() const;
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operator std::vector<float>() const;
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operator std::vector<int>() const;
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operator std::vector<std::string>() const;
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operator IfcUtil::IfcSchemaEntity() const;
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//operator IfcUtil::IfcAbstractSelect::ptr() const;
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operator IfcEntities() const;
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unsigned int Size() const;
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ArgumentPtr operator [] (unsigned int i) const;
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std::string toString() const;
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bool isNull() const;
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};
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//
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// Argument of an IFC type
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// #1=IfcTrimmedCurve(#2,(IFCPARAMETERVALUE(0.)),(IFCPARAMETERVALUE(1.)),.T.,.PARAMETER.);
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// ===================== =====================
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//
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class EntityArgument : public Argument {
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private:
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IfcUtil::IfcArgumentSelect* entity;
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public:
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EntityArgument(Ifc2x3::Type::Enum ty, Token t);
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~EntityArgument();
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operator int() const;
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operator bool() const;
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operator float() const;
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operator std::string() const;
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operator std::vector<float>() const;
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operator std::vector<int>() const;
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operator std::vector<std::string>() const;
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operator IfcUtil::IfcSchemaEntity() const;
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//operator IfcUtil::IfcAbstractSelect::ptr() const;
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operator IfcEntities() const;
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unsigned int Size() const;
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ArgumentPtr operator [] (unsigned int i) const;
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std::string toString() const;
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bool isNull() const;
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};
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//
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// Entity defined in an IFC file, e.g.
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// #1=IfcDirection((1.,0.,0.));
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// ============================
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//
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class Entity : public IfcAbstractEntity {
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private:
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ArgumentPtr args;
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Ifc2x3::Type::Enum _type;
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public:
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unsigned int _id;
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unsigned int offset;
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Entity(unsigned int i, Tokens* t);
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Entity(unsigned int i, Tokens* t, unsigned int o);
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~Entity();
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IfcEntities getInverse(Ifc2x3::Type::Enum c = Ifc2x3::Type::ALL);
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IfcEntities getInverse(Ifc2x3::Type::Enum c, int i, const std::string& a);
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void Load(std::vector<unsigned int>& ids, bool seek=false);
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ArgumentPtr getArgument (unsigned int i);
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std::string toString();
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std::string datatype();
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Ifc2x3::Type::Enum type() const;
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bool is(Ifc2x3::Type::Enum v) const;
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unsigned int id();
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};
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class IfcException : public std::exception {
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private:
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std::string error;
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public:
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IfcException(std::string e);
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~IfcException () throw ();
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const char* what() const throw();
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};
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}
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typedef IfcUtil::IfcSchemaEntity IfcEntity;
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typedef IfcEntities IfcEntities;
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typedef std::map<Ifc2x3::Type::Enum,IfcEntities> MapEntitiesByType;
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typedef std::map<unsigned int,IfcEntity> MapEntityById;
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typedef std::map<unsigned int,IfcEntities> MapEntitiesByRef;
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typedef std::map<unsigned int,unsigned int> MapOffsetById;
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//
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// Several static convenience functions and variables
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//
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class Ifc {
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private:
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static MapEntitiesByType bytype;
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static MapEntityById byid;
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static MapEntitiesByRef byref;
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static MapOffsetById offsets;
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static unsigned int lastId;
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static std::ostream* log1;
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static std::ostream* log2;
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public:
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static void SetOutput(std::ostream* l1, std::ostream* l2);
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static void LogMessage(const std::string& type, const std::string& message, const IfcAbstractEntityPtr entity=0);
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static IfcParse::File* file;
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static IfcParse::Tokens* tokens;
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template <class T>
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static typename T::list EntitiesByType() {
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IfcEntities e = EntitiesByType(T::Class());
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typename T::list l ( new IfcTemplatedEntityList<T>() );
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if ( e && e->Size() )
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for ( IfcEntityList::it it = e->begin(); it != e->end(); ++ it ) {
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l->push(reinterpret_pointer_cast<IfcUtil::IfcBaseClass,T>(*it));
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}
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return l;
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}
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static IfcEntities EntitiesByType(Ifc2x3::Type::Enum t);
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static IfcEntities EntitiesByReference(int id);
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static IfcEntity EntityById(int id);
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static bool Init(const std::string& fn);
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static bool Init(std::istream& fn, int len);
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static bool Init(IfcParse::File* f);
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static void Dispose();
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static float LengthUnit;
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static float PlaneAngleUnit;
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static int CircleSegments;
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};
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float UnitPrefixToValue( Ifc2x3::IfcSIPrefix::IfcSIPrefix v );
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#endif
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