lbfileio.c File Reference

---

Detailed Description

Library for r/w of little/big endian binary data from files.

Purpose:

Little-endian and big-endian file/buffer reading functions.

Comment:

Those are simple, low-level functions, so all are defined as inline.

Author:

Tomasz Lis

Date:

11 Mar 2005 - 22 Jul 2008

Copying and copyrights:

This program 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.

Definition in file lbfileio.c.

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "lbfileio.h"

Go to the source code of this file.

Functions
void	write_int16_le_file (FILE *fp, unsigned short x)
	Writes 2-byte little-endian number to given FILE.
void	write_int16_le_buf (unsigned char *buff, unsigned short x)
	Writes 2-byte little-endian number into given buffer.
void	write_int32_le_file (FILE *fp, unsigned long x)
	Writes 4-byte little-endian number to given FILE.
void	write_int32_le_buf (unsigned char *buff, unsigned long x)
	Writes 4-byte little-endian number into given buffer.
long	read_int32_le_file (FILE *fp)
	Reads 4-byte little-endian number from given FILE.
long	read_int32_le_buf (const unsigned char *buff)
	Reads 4-byte little-endian number from given buffer.
unsigned short	read_int16_le_buf (const unsigned char *buff)
	Reads 2-byte little-endian number from given buffer.
unsigned short	read_int16_le_file (FILE *fp)
	Reads 2-byte little-endian number from given FILE.
long	read_int32_be_file (FILE *fp)
	Reads 4-byte big-endian number from given FILE.
long	read_int32_be_buf (const unsigned char *buff)
	Reads 4-byte big-endian number from given buffer.
unsigned short	read_int16_be_buf (const unsigned char *buff)
	Reads 2-byte big-endian number from given buffer.
unsigned short	read_int16_be_file (FILE *fp)
	Reads 2-byte big-endian number from given FILE.
void	write_int16_be_buf (unsigned char *buff, unsigned short x)
	Writes 2-byte big-endian number into given buffer.
void	write_int32_be_buf (unsigned char *buff, unsigned long x)
	Writes 4-byte big-endian number into given buffer.
long	file_length (char *path)
	Returns length of given file.
long	file_length_opened (FILE *fp)
	Returns length of opened file.
unsigned char	read_int8_buf (const unsigned char *buff)
	Reads 1-byte number from given buffer.
short	nth_bit (unsigned char c, short n)
	Returns the nth bit of character c.
short	nth_bit_fourbytes (unsigned char c[4], short n)
	Returns the nth bit of c.

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Function Documentation

long file_length

(

char *

path

)

[inline]

Returns length of given file.

Value -1 means error.

Definition at line 184 of file lbfileio.c.

long file_length_opened

(

FILE *

fp

)

[inline]

Returns length of opened file.

Value -1 means error.

Definition at line 203 of file lbfileio.c.

Referenced by read_datfile_data(), read_jtytabfile_data(), and read_tabfile_data().

short nth_bit	(	unsigned char	c,
		short	n
	)			[inline]

Returns the nth bit of character c.

Parameters:

	c	Source character.
	n	Source bit number.

Returns:

The nth bit, either 1 or 0.

Definition at line 233 of file lbfileio.c.

Referenced by nth_bit_fourbytes().

short nth_bit_fourbytes	(	unsigned char	c[4],
		short	n
	)			[inline]

Returns the nth bit of c.

Goes like this: [31 30 29 28 27 26 25 24][...][...][7 6 5 4 3 2 1 0]

Parameters:

	c	Source characters array.
	n	Source bit number.

Returns:

The nth bit, either 1 or 0.

Definition at line 250 of file lbfileio.c.

unsigned short read_int16_be_buf

(

const unsigned char *

buff

)

[inline]

Reads 2-byte big-endian number from given buffer.

Definition at line 141 of file lbfileio.c.

Referenced by rnc_unpack().

unsigned short read_int16_be_file

(

FILE *

fp

)

[inline]

Reads 2-byte big-endian number from given FILE.

Definition at line 152 of file lbfileio.c.

unsigned short read_int16_le_buf

(

const unsigned char *

buff

)

[inline]

Reads 2-byte little-endian number from given buffer.

Definition at line 93 of file lbfileio.c.

Referenced by bit_advance(), bitread_fix(), bitread_init(), get_clm_entry_base(), get_clm_entry_solid(), get_clm_entry_topcube(), load_cubedata(), load_dat(), load_flg(), load_slb(), load_textureanim(), load_tng(), and write_def_clm_source().

unsigned short read_int16_le_file

(

FILE *

fp

)

[inline]

Reads 2-byte little-endian number from given FILE.

Definition at line 104 of file lbfileio.c.

Referenced by read_datfile_data().

long read_int32_be_buf

(

const unsigned char *

buff

)

[inline]

Reads 4-byte big-endian number from given buffer.

Definition at line 128 of file lbfileio.c.

Referenced by rnc_plen(), rnc_ulen(), and rnc_unpack().

long read_int32_be_file

(

FILE *

fp

)

[inline]

Reads 4-byte big-endian number from given FILE.

Definition at line 115 of file lbfileio.c.

long read_int32_le_buf

(

const unsigned char *

buff

)

[inline]

Reads 4-byte little-endian number from given buffer.

Definition at line 80 of file lbfileio.c.

Referenced by load_apt(), load_clm(), load_cubedata(), load_lgt(), read_jtytabfile_data(), and read_tabfile_data().

long read_int32_le_file

(

FILE *

fp

)

[inline]

Reads 4-byte little-endian number from given FILE.

Definition at line 67 of file lbfileio.c.

unsigned char read_int8_buf

(

const unsigned char *

buff

)

[inline]

Reads 1-byte number from given buffer.

Simple wrapper for use with both little and big endian files.

Definition at line 222 of file lbfileio.c.

Referenced by bit_advance(), bitread_fix(), and bitread_init().

void write_int16_be_buf	(	unsigned char *	buff,
		unsigned short	x
	)			[inline]

Writes 2-byte big-endian number into given buffer.

Definition at line 163 of file lbfileio.c.

void write_int16_le_buf	(	unsigned char *	buff,
		unsigned short	x
	)			[inline]

Writes 2-byte little-endian number into given buffer.

Definition at line 36 of file lbfileio.c.

void write_int16_le_file	(	FILE *	fp,
		unsigned short	x
	)			[inline]

Writes 2-byte little-endian number to given FILE.

Definition at line 27 of file lbfileio.c.

Referenced by write_bmp_fp_24b(), write_bmp_fp_idx(), write_cubedata(), write_dat(), write_flg(), write_slb(), and write_tng().

void write_int32_be_buf	(	unsigned char *	buff,
		unsigned long	x
	)			[inline]

Writes 4-byte big-endian number into given buffer.

Definition at line 172 of file lbfileio.c.

void write_int32_le_buf	(	unsigned char *	buff,
		unsigned long	x
	)			[inline]

Writes 4-byte little-endian number into given buffer.

Definition at line 56 of file lbfileio.c.

Referenced by level_clear_datclm(), and write_clm().

void write_int32_le_file	(	FILE *	fp,
		unsigned long	x
	)			[inline]

Writes 4-byte little-endian number to given FILE.

Definition at line 45 of file lbfileio.c.

Referenced by write_apt(), write_bmp_fp_24b(), write_bmp_fp_idx(), write_cubedata(), write_jtytabfile_data(), write_lgt(), and write_tabfile_data().