| /* mpz_out_str(stream, base, integer) -- Output to STREAM the multi prec. |
| integer INTEGER in base BASE. |
| |
| Copyright 1991, 1993, 1994, 1996, 2001, 2005 Free Software Foundation, Inc. |
| |
| This file is part of the GNU MP Library. |
| |
| The GNU MP Library is free software; you can redistribute it and/or modify |
| it under the terms of the GNU Lesser General Public License as published by |
| the Free Software Foundation; either version 3 of the License, or (at your |
| option) any later version. |
| |
| The GNU MP Library is distributed in the hope that it will be useful, but |
| WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY |
| or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public |
| License for more details. |
| |
| You should have received a copy of the GNU Lesser General Public License |
| along with the GNU MP Library. If not, see http://www.gnu.org/licenses/. */ |
| |
| #include <stdio.h> |
| #include "gmp.h" |
| #include "gmp-impl.h" |
| |
| size_t |
| mpz_out_str (FILE *stream, int base, mpz_srcptr x) |
| { |
| mp_ptr xp; |
| mp_size_t x_size = x->_mp_size; |
| unsigned char *str; |
| size_t str_size; |
| size_t i; |
| size_t written; |
| char *num_to_text; |
| TMP_DECL; |
| |
| if (stream == 0) |
| stream = stdout; |
| |
| if (base >= 0) |
| { |
| num_to_text = "0123456789abcdefghijklmnopqrstuvwxyz"; |
| if (base == 0) |
| base = 10; |
| else if (base > 36) |
| { |
| num_to_text = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"; |
| if (base > 62) |
| return 0; |
| } |
| } |
| else |
| { |
| base = -base; |
| num_to_text = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ"; |
| } |
| |
| if (x_size == 0) |
| { |
| fputc ('0', stream); |
| return ferror (stream) ? 0 : 1; |
| } |
| |
| written = 0; |
| |
| if (x_size < 0) |
| { |
| fputc ('-', stream); |
| x_size = -x_size; |
| written = 1; |
| } |
| |
| TMP_MARK; |
| str_size = ((size_t) (x_size * BITS_PER_MP_LIMB |
| * __mp_bases[base].chars_per_bit_exactly)) + 3; |
| str = (unsigned char *) TMP_ALLOC (str_size); |
| |
| /* Move the number to convert into temporary space, since mpn_get_str |
| clobbers its argument + needs one extra high limb.... */ |
| xp = (mp_ptr) TMP_ALLOC ((x_size + 1) * BYTES_PER_MP_LIMB); |
| MPN_COPY (xp, x->_mp_d, x_size); |
| |
| str_size = mpn_get_str (str, base, xp, x_size); |
| |
| /* mpn_get_str might make some leading zeros. Skip them. */ |
| while (*str == 0) |
| { |
| str_size--; |
| str++; |
| } |
| |
| /* Translate to printable chars. */ |
| for (i = 0; i < str_size; i++) |
| str[i] = num_to_text[str[i]]; |
| str[str_size] = 0; |
| |
| { |
| size_t fwret; |
| fwret = fwrite ((char *) str, 1, str_size, stream); |
| written += fwret; |
| } |
| |
| TMP_FREE; |
| return ferror (stream) ? 0 : written; |
| } |