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From: Krogg <krogg DOT no DOT to DOT spam AT gtcom DOT net>
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Newsgroups: comp.os.msdos.djgpp
Subject: Re: help with a bit stream....
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Date: Tue, 28 Mar 2000 20:24:38 -0500
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To: djgpp AT Delorie DOT com
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Reply-To: djgpp AT delorie DOT com

Nate Eldredge wrote:
> 
> I suspect what you'd do is to have a buffer of at least one byte, then
> return bits from this buffer, and refill it when empty.  Something
> like:
> 
> int buf; /* we really only use one byte of it */
> int bits_left = 0;
> 
> /* Note this reads the least significant bit first... it could be
>    changed. */
> int get_bit() {
>         int bit;
>         if (bits_left == 0) {
>                 buf = getc(input); /* read one byte */
>                 /* handle error or EOF case */
>         }
>         bit = buf & 1; /* get least significant bit */
>         buf >>= 1;     /* shift for the next time */
>         bits_left--;   /* and note that we've used one bit */
>         return bit;
> }
> 
> Presumably the code you have does the same thing, but associates a
> buffer with each file (which is why there are the funny structs).
> This allows you to get bits from multiple files at once.

Yes,this is the actual code...(its found in "bitfiles.c"
from the snippits code collection that can be downloaded from:
http://www.snippets.org/  )

int bfread(bfile *bf)
{
      if (0 == bf->rcnt)          /* read new byte */
      {
            bf->rbuf = (char)fgetc(bf->file);
            bf->rcnt = 8;
      }
      bf->rcnt--;
      return (bf->rbuf & (1 << bf->rcnt)) != 0;
}

I just dont understand how the end of file was implemented
yet.....

The header file #includes other headers and those #include other
headers...I just want to chop everything up and put it in one
file that i can #include in my sources.....

I am finding this difficult,cause i dont understand all the
caveats of headers and #include'd files....Anyhelp on doing
this would be SUPER cool.


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