contrib/gmp/mpz/iset_str.c

   1 /* mpz_init_set_str(string, base) -- Convert the \0-terminated string
   2    STRING in base BASE to a multiple precision integer.  Return a MP_INT
   3    structure representing the integer.  Allow white space in the
   4    string.  If BASE == 0 determine the base in the C standard way,
   5    i.e.  0xhh...h means base 16, 0oo...o means base 8, otherwise
   6    assume base 10.
   7
   8 Copyright 1991, 1993, 1994, 1995, 2000, 2001, 2002 Free Software Foundation,
   9 Inc.
  10
  11 This file is part of the GNU MP Library.
  12
  13 The GNU MP Library is free software; you can redistribute it and/or modify
  14 it under the terms of the GNU Lesser General Public License as published by
  15 the Free Software Foundation; either version 3 of the License, or (at your
  16 option) any later version.
  17
  18 The GNU MP Library is distributed in the hope that it will be useful, but
  19 WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  20 or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
  21 License for more details.
  22
  23 You should have received a copy of the GNU Lesser General Public License
  24 along with the GNU MP Library.  If not, see http://www.gnu.org/licenses/.  */
  25
  26 #include "gmp.h"
  27 #include "gmp-impl.h"
  28
  29 int
  30 mpz_init_set_str (mpz_ptr x, const char *str, int base)
  31 {
  32   x->_mp_alloc = 1;
  33   x->_mp_d = (mp_ptr) (*__gmp_allocate_func) (BYTES_PER_MP_LIMB);
  34
  35   /* if str has no digits mpz_set_str leaves x->_mp_size unset */
  36   x->_mp_size = 0;
  37
  38 #ifdef __CHECKER__
  39   /* let the low limb look initialized, for the benefit of mpz_get_ui etc */
  40   x->_mp_d[0] = 0;
  41 #endif
  42
  43   return mpz_set_str (x, str, base);
  44 }