uPDFParser/include/uPDFParser.h

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/*
Copyright 2021 Grégory Soutadé
This file is part of uPDFParser.
uPDFParser is free software: you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
uPDFParser 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
GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with uPDFParser. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef _UPDFPARSER_HPP_
#define _UPDFPARSER_HPP_
#include <exception>
#include <map>
#include <vector>
#include <string>
#include <sstream>
#include <iostream>
#include <iomanip>
#include <string.h>
#include <unistd.h>
#include "uPDFTypes.h"
#include "uPDFObject.h"
namespace uPDFParser
{
/**
* @brief PDF Parser
*/
class Parser
{
public:
Parser():
fd(0)
{}
~Parser()
{
if (fd) close(fd);
std::vector<Object*>::iterator it;
for(it=_objects.begin(); it!=_objects.end(); it++)
delete *it;
}
/**
* @brief Parse a file
*/
void parse(const std::string& filename);
/**
* @brief Write a PDF file with internal objects
*
* @param filename File path
* @param update Only append new objects if true
* Write a new PDF file if false (not supported for now)
*/
void write(const std::string& filename, bool update=false);
/**
* @brief Get internals (or parsed) objects
*/
std::vector<Object*>& objects() { return _objects; }
/**
* @brief Add an object
*/
void addObject(Object* object) { _objects.push_back(object); }
private:
void parseObject(std::string& token);
void parseStartXref();
bool parseXref();
bool parseTrailer();
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std::string nextToken(bool exceptionOnEOF=true, bool readComment=false);
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DataType* parseType(std::string& token, Object* object, std::map<std::string, DataType*>& dict);
void parseDictionary(Object* object, std::map<std::string, DataType*>& dict);
DataType* parseSignedNumber(std::string& token);
DataType* parseNumber(std::string& token);
DataType* parseNumberOrReference(std::string& token);
Array* parseArray(Object* object);
String* parseString();
HexaString* parseHexaString();
Stream* parseStream(Object* object);
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Name* parseName(std::string& token);
void writeUpdate(const std::string& filename);
std::vector<Object*> _objects;
Object trailer;
off_t xrefOffset;
int fd;
off_t curOffset;
};
}
#endif