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

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