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

   1 /* -*-c-*-
   2  *
   3  * $Id: mptext-file.c,v 1.2 1999/12/22 15:56:21 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 /*----- Revision history --------------------------------------------------*
  31  *
  32  * $Log: mptext-file.c,v $
  33  * Revision 1.2  1999/12/22 15:56:21  mdw
  34  * Make the buffer passed to `put' op constant.
  35  *
  36  * Revision 1.1  1999/11/17 18:02:16  mdw
  37  * New multiprecision integer arithmetic suite.
  38  *
  39  */
  40
  41 /*----- Header files ------------------------------------------------------*/
  42
  43 #include <stdio.h>
  44
  45 #include "mptext.h"
  46
  47 /*----- Main code ---------------------------------------------------------*/
  48
  49 /* --- Operations table --- */
  50
  51 static int get(void *p) { FILE *fp = p; return getc(fp); }
  52
  53 static void unget(int ch, void *p) { FILE *fp = p; ungetc(ch, fp); }
  54
  55 static int put(const char *s, size_t sz, void *p)
  56 {
  57   FILE *fp = p;
  58   return (fwrite(s, 1, sz, fp) != sz);
  59 }
  60
  61 const mptext_ops mptext_fileops = { get, unget, put };
  62
  63 /* --- Convenience functions --- */
  64
  65 mp *mp_readfile(mp *m, FILE *fp, int radix)
  66 {
  67   return mp_read(m, radix, &mptext_fileops, fp);
  68 }
  69
  70 int mp_writefile(mp *m, FILE *fp, int radix)
  71 {
  72   return mp_write(m, radix, &mptext_fileops, fp);
  73 }
  74
  75 /*----- That's all, folks -------------------------------------------------*/