git.distorted.org.uk Git - u/mdw/catacomb/blob - mptext-file.c

   1 /* -*-c-*-
   2  *
   3  * $Id: mptext-file.c,v 1.3 2004/04/08 01:36:15 mdw Exp $
   4  *
   5  * Reading and writing large integers on files
   6  *
   7  * (c) 1999 Straylight/Edgeware
   8  */
   9
  10 /*----- Licensing notice --------------------------------------------------*
  11  *
  12  * This file is part of Catacomb.
  13  *
  14  * Catacomb is free software; you can redistribute it and/or modify
  15  * it under the terms of the GNU Library General Public License as
  16  * published by the Free Software Foundation; either version 2 of the
  17  * License, or (at your option) any later version.
  18  *
  19  * Catacomb is distributed in the hope that it will be useful,
  20  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  21  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  22  * GNU Library General Public License for more details.
  23  *
  24  * You should have received a copy of the GNU Library General Public
  25  * License along with Catacomb; if not, write to the Free
  26  * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
  27  * MA 02111-1307, USA.
  28  */
  29
  30 /*----- Header files ------------------------------------------------------*/
  31
  32 #include <stdio.h>
  33
  34 #include "mptext.h"
  35
  36 /*----- Main code ---------------------------------------------------------*/
  37
  38 /* --- Operations table --- */
  39
  40 static int get(void *p) { FILE *fp = p; return getc(fp); }
  41
  42 static void unget(int ch, void *p) { FILE *fp = p; ungetc(ch, fp); }
  43
  44 static int put(const char *s, size_t sz, void *p)
  45 {
  46   FILE *fp = p;
  47   return (fwrite(s, 1, sz, fp) != sz);
  48 }
  49
  50 const mptext_ops mptext_fileops = { get, unget, put };
  51
  52 /* --- Convenience functions --- */
  53
  54 mp *mp_readfile(mp *m, FILE *fp, int radix)
  55 {
  56   return mp_read(m, radix, &mptext_fileops, fp);
  57 }
  58
  59 int mp_writefile(mp *m, FILE *fp, int radix)
  60 {
  61   return mp_write(m, radix, &mptext_fileops, fp);
  62 }
  63
  64 /*----- That's all, folks -------------------------------------------------*/