From: Tom St Denis <stdenis AT compmore DOT net>
Newsgroups: comp.os.msdos.djgpp
Subject: Re: findfirst/findnext woes
Date: Tue, 02 Jan 2001 14:13:30 GMT
Organization: Deja.com
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References: <Pine DOT SUN DOT 3 DOT 91 DOT 1010102113516 DOT 18307I-100000 AT is>
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To: djgpp AT delorie DOT com
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Reply-To: djgpp AT delorie DOT com

In article <Pine DOT SUN DOT 3 DOT 91 DOT 1010102113516 DOT 18307I-100000 AT is>,
  djgpp AT delorie DOT com wrote:
>
> On Tue, 2 Jan 2001, Tom St Denis wrote:
>
> > Anyways... My code only finds the first file then findnext() returns
> > 1... ALWAYS!
> >
> > I don't want to flood the group, so if anyone has two mins to spare
> > email me at tomstdenis AT yahoo DOT com and I will send you the source to
look
> > at.
>
> My advice would be to write the shortest program you can come up with
> which uses findfirst and findnext, and still exhibits the problem, and
> then post that code here as plain text.
>
> Experience shows that, while working on the short program, either
> (1) you will find the problem in your code; or (2) the resulting
> program will be simple enough for someone to spot the problem in
> no time.

Here is the entire program (minus the bzip lib of course) (one huge
main file... the way programs of this caliber should be written...
hehehehe)

--bz.c--
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include <dir.h>
#include <dos.h>
#include <ctype.h>
#include "bzlib.h"

int main(int argc, char **argv)
{
    struct ffblk fb;
    unsigned long f, x, y;
    unsigned char buf[4096];

    if (argc == 1) {
       printf("%s: [e|d] archive [files]\nE\tEncode files into
archive\nD\tDecode files out of archive.\n", argv[0]);
       return 0; }

    if (toupper(argv[1][0]) == 'E') {
       FILE *input;
       BZFILE *output;
      /* encode */
       output = BZ2_bzopen(argv[2], "wb9");
       memset(&fb, 0, sizeof(fb));
       f = findfirst(argv[3], &fb,
FA_RDONLY|FA_HIDDEN|FA_SYSTEM|FA_ARCH);
       while (!f) {
             /* write the file name and then it's size */
             input = fopen(fb.ff_name, "rb");
             if (!input) {
                printf("Can't open: %s\n", fb.ff_name);
                return -1;
             }
             printf("%s\n", fb.ff_name);
             fseek(input, 0, SEEK_END);
             x = ftell(input);
             fseek(input, 0, SEEK_SET);
             BZ2_bzwrite(output, fb.ff_name, sizeof(fb.ff_name));
             BZ2_bzwrite(output, &x, sizeof(x));
             do {
                y = fread(buf, 1, sizeof(buf), input);
                BZ2_bzwrite(output, buf, y);
             } while (y == sizeof(buf));
             fclose(input);
             f = findnext(&fb);
       }
       BZ2_bzclose(output);
    } else {
       /* decode */
       BZFILE *input;
       FILE *output;

       /* open archive */
       input = BZ2_bzopen(argv[2], "rb");
       while (BZ2_bzread(input, fb.ff_name, sizeof(fb.ff_name))) {
             output = fopen(fb.ff_name, "wb");
             printf("%s\n", fb.ff_name);
             BZ2_bzread(input, &x, sizeof(x));
             while (x) {
                   /* read at most sizeof(buf) bytes */
                   y = (x>sizeof(buf))?sizeof(buf):x;
                   x -= y;

                   /* read/write */
                   BZ2_bzread(input, buf, y);
                   fwrite(buf, 1, y, output);
             }
             fclose(output);
       }
       BZ2_bzclose(input);
   }
    return 0;
}
--bz.c--

>


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