mirror of
https://github.com/tesseract-ocr/tesseract.git
synced 2024-11-27 20:59:36 +08:00
108 lines
4.0 KiB
C++
108 lines
4.0 KiB
C++
/**********************************************************************
|
|
* File: serialis.h (Formerly serialmac.h)
|
|
* Description: Inline routines and macros for serialisation functions
|
|
* Author: Phil Cheatle
|
|
* Created: Tue Oct 08 08:33:12 BST 1991
|
|
*
|
|
* (C) Copyright 1990, Hewlett-Packard Ltd.
|
|
** 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.
|
|
*
|
|
**********************************************************************/
|
|
|
|
#ifndef SERIALIS_H
|
|
#define SERIALIS_H
|
|
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <stdio.h>
|
|
#include "host.h"
|
|
|
|
template <typename T> class GenericVector;
|
|
class STRING;
|
|
|
|
/***********************************************************************
|
|
QUOTE_IT MACRO DEFINITION
|
|
===========================
|
|
Replace <parm> with "<parm>". <parm> may be an arbitrary number of tokens
|
|
***********************************************************************/
|
|
|
|
#define QUOTE_IT( parm ) #parm
|
|
|
|
namespace tesseract {
|
|
|
|
// Function to read a GenericVector<char> from a whole file.
|
|
// Returns false on failure.
|
|
typedef bool (*FileReader)(const STRING& filename, GenericVector<char>* data);
|
|
// Function to write a GenericVector<char> to a whole file.
|
|
// Returns false on failure.
|
|
typedef bool (*FileWriter)(const GenericVector<char>& data,
|
|
const STRING& filename);
|
|
|
|
// Simple file class.
|
|
// Allows for portable file input from memory and from foreign file systems.
|
|
class TFile {
|
|
public:
|
|
TFile();
|
|
~TFile();
|
|
|
|
// All the Open methods load the whole file into memory for reading.
|
|
// Opens a file with a supplied reader, or NULL to use the default.
|
|
// Note that mixed read/write is not supported.
|
|
bool Open(const STRING& filename, FileReader reader);
|
|
// From an existing memory buffer.
|
|
bool Open(const char* data, int size);
|
|
// From an open file and an end offset.
|
|
bool Open(FILE* fp, inT64 end_offset);
|
|
// Sets the value of the swap flag, so that FReadEndian does the right thing.
|
|
void set_swap(bool value) { swap_ = value; }
|
|
|
|
// Reads a line like fgets. Returns NULL on EOF, otherwise buffer.
|
|
// Reads at most buffer_size bytes, including '\0' terminator, even if
|
|
// the line is longer. Does nothing if buffer_size <= 0.
|
|
// To use fscanf use FGets and sscanf.
|
|
char* FGets(char* buffer, int buffer_size);
|
|
// Replicates fread, followed by a swap of the bytes if needed, returning the
|
|
// number of items read. If swap_ is true then the count items will each have
|
|
// size bytes reversed.
|
|
int FReadEndian(void* buffer, int size, int count);
|
|
// Replicates fread, returning the number of items read.
|
|
int FRead(void* buffer, int size, int count);
|
|
// Resets the TFile as if it has been Opened, but nothing read.
|
|
// Only allowed while reading!
|
|
void Rewind();
|
|
|
|
// Open for writing. Either supply a non-NULL data with OpenWrite before
|
|
// calling FWrite, (no close required), or supply a NULL data to OpenWrite
|
|
// and call CloseWrite to write to a file after the FWrites.
|
|
void OpenWrite(GenericVector<char>* data);
|
|
bool CloseWrite(const STRING& filename, FileWriter writer);
|
|
|
|
// Replicates fwrite, returning the number of items written.
|
|
// To use fprintf, use snprintf and FWrite.
|
|
int FWrite(const void* buffer, int size, int count);
|
|
|
|
private:
|
|
// The number of bytes used so far.
|
|
int offset_;
|
|
// The buffered data from the file.
|
|
GenericVector<char>* data_;
|
|
// True if the data_ pointer is owned by *this.
|
|
bool data_is_owned_;
|
|
// True if the TFile is open for writing.
|
|
bool is_writing_;
|
|
// True if bytes need to be swapped in FReadEndian.
|
|
bool swap_;
|
|
};
|
|
|
|
} // namespace tesseract.
|
|
|
|
#endif
|