mirror of https://github.com/qpdf/qpdf.git
92 lines
2.6 KiB
C++
92 lines
2.6 KiB
C++
// Copyright (c) 2005-2017 Jay Berkenbilt
|
|
//
|
|
// This file is part of qpdf.
|
|
//
|
|
// 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.
|
|
//
|
|
// Versions of qpdf prior to version 7 were released under the terms
|
|
// of version 2.0 of the Artistic License. At your option, you may
|
|
// continue to consider qpdf to be licensed under those terms. Please
|
|
// see the manual for additional information.
|
|
|
|
#ifndef __QPDF_INPUTSOURCE_HH__
|
|
#define __QPDF_INPUTSOURCE_HH__
|
|
|
|
#include <qpdf/DLL.h>
|
|
#include <qpdf/Types.h>
|
|
#include <stdio.h>
|
|
#include <string>
|
|
|
|
class InputSource
|
|
{
|
|
public:
|
|
QPDF_DLL
|
|
InputSource() :
|
|
last_offset(0)
|
|
{
|
|
}
|
|
QPDF_DLL
|
|
virtual ~InputSource()
|
|
{
|
|
}
|
|
|
|
class Finder
|
|
{
|
|
public:
|
|
Finder()
|
|
{
|
|
}
|
|
virtual ~Finder()
|
|
{
|
|
}
|
|
|
|
virtual bool check() = 0;
|
|
};
|
|
|
|
QPDF_DLL
|
|
void setLastOffset(qpdf_offset_t);
|
|
QPDF_DLL
|
|
qpdf_offset_t getLastOffset() const;
|
|
QPDF_DLL
|
|
std::string readLine(size_t max_line_length);
|
|
|
|
// Find first or last occurrence of a sequence of characters
|
|
// starting within the range defined by offset and len such that,
|
|
// when the input source is positioned at the beginning of that
|
|
// sequence, finder.check() returns true. If len is 0, the search
|
|
// proceeds until EOF. If a qualifying pattern these methods
|
|
// return true and leave the input source positioned wherever
|
|
// check() left it at the end of the matching pattern.
|
|
QPDF_DLL
|
|
bool findFirst(char const* start_chars,
|
|
qpdf_offset_t offset, size_t len,
|
|
Finder& finder);
|
|
QPDF_DLL
|
|
bool findLast(char const* start_chars,
|
|
qpdf_offset_t offset, size_t len,
|
|
Finder& finder);
|
|
|
|
virtual qpdf_offset_t findAndSkipNextEOL() = 0;
|
|
virtual std::string const& getName() const = 0;
|
|
virtual qpdf_offset_t tell() = 0;
|
|
virtual void seek(qpdf_offset_t offset, int whence) = 0;
|
|
virtual void rewind() = 0;
|
|
virtual size_t read(char* buffer, size_t length) = 0;
|
|
virtual void unreadCh(char ch) = 0;
|
|
|
|
protected:
|
|
qpdf_offset_t last_offset;
|
|
};
|
|
|
|
#endif // __QPDF_INPUTSOURCE_HH__
|