workbench/devs/diskimage/dms/getbits.c

   1 /*
   2  *     xDMS  v1.3  -  Portable DMS archive unpacker  -  Public Domain
   3  *     Written by     Andre Rodrigues de la Rocha  <adlroc@usa.net>
   4  *     Functions/macros to get a variable number of bits
   5  *
   6  */
   7
   8 #include "xdms.h"
   9
  10 const ULONG mask_bits[]={
  11         0x000000L,0x000001L,0x000003L,0x000007L,0x00000fL,0x00001fL,
  12         0x00003fL,0x00007fL,0x0000ffL,0x0001ffL,0x0003ffL,0x0007ffL,
  13         0x000fffL,0x001fffL,0x003fffL,0x007fffL,0x00ffffL,0x01ffffL,
  14         0x03ffffL,0x07ffffL,0x0fffffL,0x1fffffL,0x3fffffL,0x7fffffL,
  15         0xffffffL
  16 };
  17
  18 void initbitbuf (struct xdms_data *xdms, UBYTE *in) {
  19         xdms->bitbuf = 0;
  20         xdms->bitcount = 0;
  21         xdms->indata = in;
  22         DROPBITS(0);
  23 }