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/*
* bbe - Binary block editor
*
* Copyright (C) 2005 Timo Savinen
* This file is part of bbe.
*
* bbe is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* bbe 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with bbe; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
*/
/* $Id: bbe.h,v 1.28 2005/11/11 13:06:53 timo Exp $ */
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#ifdef HAVE_FEATURES_H
#include <features.h>
#endif
#ifdef HAVE_ERRNO_H
#include <errno.h>
#endif
#ifdef HAVE_ERROR_H
#include <error.h>
#endif
#ifdef HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#include <stdio.h>
#ifndef HAVE_OFF_T
#define long int off_t
#endif
/* Types */
/* Constants */
/* exit values */
#define EXIT_FAILURE 1
#define EXIT_SUCCESS 0
/* Input buffer size */
#define INPUT_BUFFER_LOW (16*1024)
#define INPUT_BUFFER_SIZE (16*INPUT_BUFFER_LOW)
#define INPUT_BUFFER_SAFE (INPUT_BUFFER_SIZE - INPUT_BUFFER_LOW)
/* Output buffer size*/
#define OUTPUT_BUFFER_LOW INPUT_BUFFER_LOW
#define OUTPUT_BUFFER_SIZE (16*OUTPUT_BUFFER_LOW)
#define OUTPUT_BUFFER_SAFE (OUTPUT_BUFFER_SIZE - OUTPUT_BUFFER_LOW)
/* block types */
#define BLOCK_START_M 1
#define BLOCK_START_S 2
#define BLOCK_STOP_M 4
#define BLOCK_STOP_S 8
/* structs */
/* Block definition */
struct block {
int type;
union
{
off_t N;
struct {
unsigned char *string;
off_t length;
} S;
} start;
union
{
off_t M;
struct {
unsigned char *string;
off_t length;
} S;
} stop;
};
/* Commands */
struct command_list {
char letter; // command letter (D,A,s,..)
off_t offset; // n for D,r,i and d commands
off_t count; // count for d command
unsigned char *s1; // string for A,I,r,i,s,w and y commands
off_t s1_len;
unsigned char *s2; // replace for s and dest for y
off_t s2_len;
int rpos; // replace position for s,r and y
off_t fpos; // found pos for s-command
FILE *fd; // stream for w command
struct command_list *next;
};
struct commands {
struct command_list *block_start;
struct command_list *byte;
struct command_list *block_end;
};
/* in/out files */
struct io_file {
char *file;
int fd;
off_t start_offset;
struct io_file *next;
};
/* input buffer */
struct input_buffer {
unsigned char *buffer; // buffer to be malloced
unsigned char *read_pos; // current read position
unsigned char *low_pos; // low water mark
unsigned char *block_end; // end of current block (if in buffer)
unsigned char *stream_end; // end of stream (if in buffer)
off_t stream_offset; // stream offset (at the beginning of buffer) current offset: offset + (read_pos - buffer)
off_t block_offset; // block offset (start = 0) number of bytes read at position read_pos
off_t block_num; // number of current block, first = 1
};
/* output buffer */
struct output_buffer {
unsigned char *buffer;
unsigned char *end;
unsigned char *write_pos; // current write psotion;
unsigned char *low_pos; // low water mark
off_t block_offset; // block offset (start = 0) number of bytes written at position write_pos
};
/* function prototypes */
extern void
panic(char *msg,char *info,char *syserror);
extern void *
xmalloc (size_t size);
extern void
set_output_file(char *file);
extern void
set_input_file(char *file);
extern void
init_buffer();
extern inline unsigned char
read_byte();
extern inline int
get_next_byte();
extern void
mark_block_end();
extern int
find_block();
extern inline int
last_byte();
extern void
write_buffer(unsigned char *buf,off_t length);
extern inline void
put_byte(unsigned char byte);
extern inline void
write_next_byte();
extern void
flush_buffer();
extern void
init_commands(struct commands *c);
extern void
close_commands(struct commands *c);
extern void
close_output_stream();
extern void
write_w_command(unsigned char *buf,size_t length);
extern void
execute_program(struct commands *c);
extern void
write_string(char *string);
extern char *
get_current_file(void);
extern inline unsigned char *
read_pos();
extern inline unsigned char *
block_end_pos();
extern char *
xstrdup(char *str);
/* global variables */
extern struct block block;
extern struct command *commands;
extern struct io_file out_stream;
extern struct input_buffer in_buffer;
extern struct output_buffer out_buffer;
extern int output_only_block;
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