* * * * *

   99 ways to program a hex, Part 10: C99, const and restrict correctness,
                                  assertive

It's pretty much the same as yesterday's version [1], only in C99 [2]:

> /*************************************************************************
> *
> * Copyright 2012 by Sean Conner.  All Rights Reserved.
> *
> * This program is free software; you can redistribute it and/or
> * modify it under the terms of the GNU General Public License
> * as published by the Free Software Foundation; either version 2
> * of the License, or (at your option) any later version.
> *
> * This program is distributed in the hope that it will be useful,
> * but WITHOUT ANY WARRANTY; without even the implied warranty of
> * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
> * GNU General Public License for more details.
> *
> * You should have received a copy of the GNU General Public License
> * along with this program; if not, write to the Free Software
> * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
> *
> * Comments, questions and criticisms can be sent to: [email protected]
> *
> *************************************************************************/
>
> /* Style: C99, const and restrict correctness, assertive */
>
> #include <stdio.h>
> #include <ctype.h>
> #include <string.h>
> #include <stdlib.h>
> #include <assert.h>
>
> #define LINESIZE        16
>
> static void   do_dump         (FILE *const restrict,FILE *const restrict);
>
> /****************************************************************/
>
> int main(const int argc,char *const restrict argv[])
> {
>   assert(argc    >= 1);
>   assert(argv    != NULL);
>   assert(argv[0] != NULL);
>
>   if (argc == 1)
>     do_dump(stdin,stdout);
>   else
>   {
>     for (int i = 1 ; i < argc ; i++)
>     {
>       FILE *fp = fopen(argv[i],"rb");
>       if (fp == NULL)
>       {
>         perror(argv[i]);
>         continue;
>       }
>
>       printf("-----%s-----\n",argv[i]);
>       do_dump(fp,stdout);
>       fclose(fp);
>     }
>   }
>
>   return EXIT_SUCCESS;
> }
>
> /******************************************************************/
>
> static void do_dump(FILE *const restrict fpin,FILE *const restrict fpout)
> {
>   unsigned char  buffer[BUFSIZ];
>   size_t         offset;
>   size_t         bread;
>
>   assert(fpin  != NULL);
>   assert(fpout != NULL);
>
>   offset = 0;
>
>   while((bread = fread(buffer,1,BUFSIZ,fpin)) > 0)
>   {
>     unsigned char *pbyte = buffer;
>
>     while (bread > 0)
>     {
>       char ascii[LINESIZE + 1];
>
>       fprintf(fpout,"%08lX: ",(unsigned long)offset);
>       size_t j = 0;
>
>       do
>       {
>         fprintf(fpout,"%02X ",*pbyte);
>         if (isprint(*pbyte))
>           ascii [j] = *pbyte;
>         else
>           ascii [j] = '.';
>         pbyte  ++;
>         offset ++;
>         j      ++;
>         bread  --;
>       } while ((j < LINESIZE) && (bread > 0));
>
>       ascii [j] = '\0';
>
>       if (j < LINESIZE)
>       for (size_t i = j ; i < LINESIZE ; i++) fprintf(fpout,"   ");
>
>       fprintf(fpout,"%s\n",ascii);
>     }
>
>     if (fflush(fpout) == EOF)
>     {
>       perror("output");
>       exit(EXIT_FAILURE);
>     }
>   }
> }
>
> /***************************************************************/
>

Not much to say about today's version.

* Part 9: C89, const correctness, assertive [3]
* Part 11: C89, const correctness, assertive, GCC extensions [4]

[1] gopher://gopher.conman.org/0Phlog:2012/01/17.1
[2] http://en.wikipedia.org/wiki/C99
[3] gopher://gopher.conman.org/0Phlog:2012/01/17.1
[4] gopher://gopher.conman.org/0Phlog:2012/01/19.2

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