contrib/gmp/printf/asprntffuns.c

   1 /* __gmp_asprintf_memory etc -- formatted output to allocated space.
   2
   3 Copyright 2001, 2002 Free Software Foundation, Inc.
   4
   5 This file is part of the GNU MP Library.
   6
   7 The GNU MP Library is free software; you can redistribute it and/or modify
   8 it under the terms of the GNU Lesser General Public License as published by
   9 the Free Software Foundation; either version 3 of the License, or (at your
  10 option) any later version.
  11
  12 The GNU MP Library is distributed in the hope that it will be useful, but
  13 WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  14 or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
  15 License for more details.
  16
  17 You should have received a copy of the GNU Lesser General Public License
  18 along with the GNU MP Library.  If not, see http://www.gnu.org/licenses/.  */
  19
  20
  21 /* These routines are in a separate file so that the mpz_t, mpq_t and mpf_t
  22    operator<< routines can avoid dragging vsnprintf into the link (via
  23    __gmp_asprintf_format).  */
  24
  25 #include "config.h"
  26
  27 #if HAVE_STDARG
  28 #include <stdarg.h>
  29 #else
  30 #include <varargs.h>
  31 #endif
  32
  33 #include <stdio.h>
  34 #include <stdlib.h>
  35 #include <string.h>
  36
  37 #include "gmp.h"
  38 #include "gmp-impl.h"
  39
  40
  41 int
  42 __gmp_asprintf_memory (struct gmp_asprintf_t *d, const char *str, size_t len)
  43 {
  44   GMP_ASPRINTF_T_NEED (d, len);
  45   memcpy (d->buf + d->size, str, len);
  46   d->size += len;
  47   return len;
  48 }
  49
  50 int
  51 __gmp_asprintf_reps (struct gmp_asprintf_t *d, int c, int reps)
  52 {
  53   GMP_ASPRINTF_T_NEED (d, reps);
  54   memset (d->buf + d->size, c, reps);
  55   d->size += reps;
  56   return reps;
  57 }
  58
  59 int
  60 __gmp_asprintf_final (struct gmp_asprintf_t *d)
  61 {
  62   char  *buf = d->buf;
  63   ASSERT (d->alloc >= d->size + 1);
  64   buf[d->size] = '\0';
  65   __GMP_REALLOCATE_FUNC_MAYBE_TYPE (buf, d->alloc, d->size+1, char);
  66   *d->result = buf;
  67   return 0;
  68 }