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panda/src/pnmimage/pnmbitio.cxx File Reference

#include "pnmbitio.h"
#include <assert.h>

Go to the source code of this file.

Compounds

struct  bitstream

Defines

#define Mask(n)   ((1<<(n))-1)
#define BitPut(b, ul, n)
#define BitGet(b, n)   (((b)->bitbuf>>((b)->nbitbuf-=(n))) & Mask(n))

Functions

EXPCL_PANDA struct bitstream * pm_bitinit (istream *f, char *mode)
EXPCL_PANDA struct bitstream * pm_bitinit (ostream *f, char *mode)
EXPCL_PANDA int pm_bitfini (struct bitstream *b)
EXPCL_PANDA int pm_bitread (struct bitstream *b, unsigned long nbits, unsigned long *val)
EXPCL_PANDA int pm_bitwrite (struct bitstream *b, unsigned long nbits, unsigned long val)

Detailed Description

Definition in file pnmbitio.cxx.

Define Documentation

#define BitGet (  b,
n   )     (((b)->bitbuf>>((b)->nbitbuf-=(n))) & Mask(n))
 

Definition at line 37 of file pnmbitio.cxx.

Referenced by pm_bitfini(), pm_bitread(), and pm_bitwrite().

#define BitPut (  b,
ul,
n   ) 
 

Value:

((b)->bitbuf = (((b)->bitbuf<<(n))      \
                                        |((ul)&Mask(n))),       \
                        (b)->nbitbuf += (n))

Definition at line 33 of file pnmbitio.cxx.

Referenced by pm_bitfini(), pm_bitread(), and pm_bitwrite().

#define Mask (  n   )     ((1<<(n))-1)
 

Definition at line 31 of file pnmbitio.cxx.

Function Documentation

EXPCL_PANDA int pm_bitfini (  struct bitstream *  b  ) 
 

Definition at line 100 of file pnmbitio.cxx.

References BitGet, BitPut, bitstream::mode, bitstream::nbitbuf, and bitstream::outf.

EXPCL_PANDA struct bitstream* pm_bitinit (  ostream *  f,
char *  mode
) 
 

Definition at line 70 of file pnmbitio.cxx.

References bitstream::mode, and bitstream::outf.

Referenced by BMPreadrow(), and BMPwriterow().

EXPCL_PANDA struct bitstream* pm_bitinit (  istream *  f,
char *  mode
) 
 

Definition at line 50 of file pnmbitio.cxx.

EXPCL_PANDA int pm_bitread (  struct bitstream *  b,
unsigned long  nbits,
unsigned long *  val
) 
 

Definition at line 147 of file pnmbitio.cxx.

References BitGet, BitPut, bitstream::inf, and bitstream::nbitbuf.

EXPCL_PANDA int pm_bitwrite (  struct bitstream *  b,
unsigned long  nbits,
unsigned long  val
) 
 

Definition at line 183 of file pnmbitio.cxx.

References BitGet, BitPut, bitstream::nbitbuf, and bitstream::outf.

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