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Annotation of OpenXM_contrib/gmp/mpbsd/min.c, Revision 1.1.1.3

1.1       maekawa     1: /* min(MINT) -- Do decimal input from standard input and store result in
                      2:    MINT.
                      3:
1.1.1.3 ! ohara       4: Copyright 1991, 1994, 1996, 2000, 2001 Free Software Foundation, Inc.
1.1       maekawa     5:
                      6: This file is part of the GNU MP Library.
                      7:
                      8: The GNU MP Library is free software; you can redistribute it and/or modify
1.1.1.2   maekawa     9: it under the terms of the GNU Lesser General Public License as published by
                     10: the Free Software Foundation; either version 2.1 of the License, or (at your
1.1       maekawa    11: option) any later version.
                     12:
                     13: The GNU MP Library is distributed in the hope that it will be useful, but
                     14: WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
1.1.1.2   maekawa    15: or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
1.1       maekawa    16: License for more details.
                     17:
1.1.1.2   maekawa    18: You should have received a copy of the GNU Lesser General Public License
1.1       maekawa    19: along with the GNU MP Library; see the file COPYING.LIB.  If not, write to
                     20: the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
                     21: MA 02111-1307, USA. */
                     22:
                     23: #include <stdio.h>
                     24: #include <ctype.h>
                     25: #include "mp.h"
                     26: #include "gmp.h"
                     27: #include "gmp-impl.h"
1.1.1.2   maekawa    28:
                     29: static int
                     30: digit_value_in_base (int c, int base)
                     31: {
                     32:   int digit;
                     33:
                     34:   if (isdigit (c))
                     35:     digit = c - '0';
                     36:   else if (islower (c))
                     37:     digit = c - 'a' + 10;
                     38:   else if (isupper (c))
                     39:     digit = c - 'A' + 10;
                     40:   else
                     41:     return -1;
                     42:
                     43:   if (digit < base)
                     44:     return digit;
                     45:   return -1;
                     46: }
1.1       maekawa    47:
                     48: void
                     49: min (MINT *dest)
                     50: {
                     51:   char *str;
                     52:   size_t alloc_size, str_size;
                     53:   int c;
                     54:   int negative;
                     55:   mp_size_t dest_size;
                     56:
                     57:   alloc_size = 100;
1.1.1.3 ! ohara      58:   str = (char *) (*__gmp_allocate_func) (alloc_size);
1.1       maekawa    59:   str_size = 0;
                     60:
                     61:   /* Skip whitespace.  */
                     62:   do
                     63:     c = getc (stdin);
                     64:   while (isspace (c));
                     65:
                     66:   negative = 0;
                     67:   if (c == '-')
                     68:     {
                     69:       negative = 1;
                     70:       c = getc (stdin);
                     71:     }
                     72:
                     73:   if (digit_value_in_base (c, 10) < 0)
                     74:     return;                    /* error if no digits */
                     75:
                     76:   for (;;)
                     77:     {
                     78:       int dig;
                     79:       if (str_size >= alloc_size)
                     80:        {
                     81:          size_t old_alloc_size = alloc_size;
                     82:          alloc_size = alloc_size * 3 / 2;
1.1.1.3 ! ohara      83:          str = (char *) (*__gmp_reallocate_func) (str, old_alloc_size, alloc_size);
1.1       maekawa    84:        }
                     85:       dig = digit_value_in_base (c, 10);
                     86:       if (dig < 0)
                     87:        break;
                     88:       str[str_size++] = dig;
                     89:       c = getc (stdin);
                     90:     }
                     91:
                     92:   ungetc (c, stdin);
                     93:
                     94:   dest_size = str_size / __mp_bases[10].chars_per_limb + 1;
                     95:   if (dest->_mp_alloc < dest_size)
                     96:     _mp_realloc (dest, dest_size);
                     97:
                     98:   dest_size = mpn_set_str (dest->_mp_d, (unsigned char *) str, str_size, 10);
                     99:   dest->_mp_size = negative ? -dest_size : dest_size;
                    100:
1.1.1.3 ! ohara     101:   (*__gmp_free_func) (str, alloc_size);
1.1       maekawa   102:   return;
                    103: }