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Annotation of OpenXM_contrib/gmp/mpbsd/min.c, Revision 1.1.1.1

1.1       maekawa     1: /* min(MINT) -- Do decimal input from standard input and store result in
                      2:    MINT.
                      3:
                      4: Copyright (C) 1991, 1994 Free Software Foundation, Inc.
                      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
                      9: it under the terms of the GNU Library General Public License as published by
                     10: the Free Software Foundation; either version 2 of the License, or (at your
                     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
                     15: or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Library General Public
                     16: License for more details.
                     17:
                     18: You should have received a copy of the GNU Library General Public License
                     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"
                     28:
                     29: void
                     30: #if __STDC__
                     31: min (MINT *dest)
                     32: #else
                     33: min (dest)
                     34:      MINT *dest;
                     35: #endif
                     36: {
                     37:   char *str;
                     38:   size_t alloc_size, str_size;
                     39:   int c;
                     40:   int negative;
                     41:   mp_size_t dest_size;
                     42:
                     43:   alloc_size = 100;
                     44:   str = (char *) (*_mp_allocate_func) (alloc_size);
                     45:   str_size = 0;
                     46:
                     47:   /* Skip whitespace.  */
                     48:   do
                     49:     c = getc (stdin);
                     50:   while (isspace (c));
                     51:
                     52:   negative = 0;
                     53:   if (c == '-')
                     54:     {
                     55:       negative = 1;
                     56:       c = getc (stdin);
                     57:     }
                     58:
                     59:   if (digit_value_in_base (c, 10) < 0)
                     60:     return;                    /* error if no digits */
                     61:
                     62:   for (;;)
                     63:     {
                     64:       int dig;
                     65:       if (str_size >= alloc_size)
                     66:        {
                     67:          size_t old_alloc_size = alloc_size;
                     68:          alloc_size = alloc_size * 3 / 2;
                     69:          str = (char *) (*_mp_reallocate_func) (str, old_alloc_size, alloc_size);
                     70:        }
                     71:       dig = digit_value_in_base (c, 10);
                     72:       if (dig < 0)
                     73:        break;
                     74:       str[str_size++] = dig;
                     75:       c = getc (stdin);
                     76:     }
                     77:
                     78:   ungetc (c, stdin);
                     79:
                     80:   dest_size = str_size / __mp_bases[10].chars_per_limb + 1;
                     81:   if (dest->_mp_alloc < dest_size)
                     82:     _mp_realloc (dest, dest_size);
                     83:
                     84:   dest_size = mpn_set_str (dest->_mp_d, (unsigned char *) str, str_size, 10);
                     85:   dest->_mp_size = negative ? -dest_size : dest_size;
                     86:
                     87:   (*_mp_free_func) (str, alloc_size);
                     88:   return;
                     89: }