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/***********************************************************HeaderBegin*******
*
* File: bitio.h
*
* Author: T.W. M.F.
* Created: 23-July-96
*
* Description: Routines for buffering and bit-io
*
* Notes:
*
* Modified:
*
***********************************************************HeaderEnd*********/
#ifndef _BITIO_H
#define _BITIO_H
#include <stdio.h>
/***********************************************************CommentBegin******
*
* -- Bitstr -- Bitstream Type
*
* Author: T.W.
*
* Created: 23-July-96
*
* Description: int size buffer size in bit
* int ind indicator; number of bits in buffer
* int actualSize actual size of the buffer (read in)
* Byte *b pointer to buffer
* FILE *fp pointer to file
*
* Note: -
*
* See also: -
*
* Modified: 13-Aug-96 K.S.
*
*****************************************************************************/
typedef struct{
int size;
int ind;
int actualSize;
Byte *b;
FILE *fp;
} Bitstr;
/***********************************************************CommentEnd********/
/***********************************************************CommentBegin******
*
* -- READBIT -- Macro: extracts bit
*
* Arguments in: x, l
*
* Return values: bit number l (starting from MSB) out of x
*****************************************************************************/
#define READBIT(x,l) (unsigned long) (((x) & (1UL << (l))) ? 1 : 0)
/***********************************************************CommentEnd********/
/***********************************************************CommentBegin******
*
* -- SETBIT -- Macro: set bit number l to 1 in y
*
* Arguments in: y, l
*
* Return values:
*****************************************************************************/
#define SETBIT(y,l) ((y) |= (1UL << (l)))
/***********************************************************CommentEnd********/
/***********************************************************CommentBegin******
*
* -- UNSETBIT -- Macro: set bit number l to 0 in y
*
* Arguments in: y, l
*
* Return values:
*****************************************************************************/
#define UNSETBIT(y,l) ((y) &= (~(1UL << (l))))
/***********************************************************CommentEnd********/
/*-------------------------------------*
| #defines
\--------------------------------------*/
#define BUFFER_BLOCK_SIZE 512 /* Stepsize for reallocation of buffer */
/* Include prototype file */
#include "bitOut.p"
#endif /* _BITIO_H */
|
