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Annotation of OpenXM_contrib/gmp/mpz/out_str.c, Revision 1.1.1.3

1.1       maekawa     1: /* mpz_out_str(stream, base, integer) -- Output to STREAM the multi prec.
                      2:    integer INTEGER in base BASE.
                      3:
1.1.1.3 ! ohara       4: Copyright 1991, 1993, 1994, 1996, 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 "gmp.h"
                     25: #include "gmp-impl.h"
                     26:
                     27: size_t
                     28: mpz_out_str (FILE *stream, int base, mpz_srcptr x)
                     29: {
                     30:   mp_ptr xp;
                     31:   mp_size_t x_size = x->_mp_size;
                     32:   unsigned char *str;
                     33:   size_t str_size;
                     34:   size_t i;
                     35:   size_t written;
                     36:   char *num_to_text;
                     37:   TMP_DECL (marker);
                     38:
                     39:   if (stream == 0)
                     40:     stream = stdout;
                     41:
                     42:   if (base >= 0)
                     43:     {
                     44:       if (base == 0)
                     45:        base = 10;
                     46:       num_to_text = "0123456789abcdefghijklmnopqrstuvwxyz";
                     47:     }
                     48:   else
                     49:     {
                     50:       base = -base;
                     51:       num_to_text = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ";
                     52:     }
                     53:
                     54:   if (x_size == 0)
                     55:     {
                     56:       fputc ('0', stream);
                     57:       return ferror (stream) ? 0 : 1;
                     58:     }
                     59:
                     60:   written = 0;
                     61:
                     62:   if (x_size < 0)
                     63:     {
                     64:       fputc ('-', stream);
                     65:       x_size = -x_size;
                     66:       written = 1;
                     67:     }
                     68:
                     69:   TMP_MARK (marker);
                     70:   str_size = ((size_t) (x_size * BITS_PER_MP_LIMB
                     71:                        * __mp_bases[base].chars_per_bit_exactly)) + 3;
                     72:   str = (unsigned char *) TMP_ALLOC (str_size);
                     73:
                     74:   /* Move the number to convert into temporary space, since mpn_get_str
                     75:      clobbers its argument + needs one extra high limb....  */
                     76:   xp = (mp_ptr) TMP_ALLOC ((x_size + 1) * BYTES_PER_MP_LIMB);
                     77:   MPN_COPY (xp, x->_mp_d, x_size);
                     78:
                     79:   str_size = mpn_get_str (str, base, xp, x_size);
                     80:
                     81:   /* mpn_get_str might make some leading zeros.  Skip them.  */
                     82:   while (*str == 0)
                     83:     {
                     84:       str_size--;
                     85:       str++;
                     86:     }
                     87:
                     88:   /* Translate to printable chars.  */
                     89:   for (i = 0; i < str_size; i++)
                     90:     str[i] = num_to_text[str[i]];
                     91:   str[str_size] = 0;
                     92:
                     93:   {
                     94:     size_t fwret;
                     95:     fwret = fwrite ((char *) str, 1, str_size, stream);
                     96:     written += fwret;
                     97:   }
                     98:
                     99:   TMP_FREE (marker);
                    100:   return ferror (stream) ? 0 : written;
                    101: }