1/* mpz_out_str(stream, base, integer) -- Output to STREAM the multi prec. 2 integer INTEGER in base BASE. 3 4Copyright 1991, 1993, 1994, 1996, 2001, 2005, 2011, 2012, 2017 Free 5Software Foundation, Inc. 6 7This file is part of the GNU MP Library. 8 9The GNU MP Library is free software; you can redistribute it and/or modify 10it under the terms of either: 11 12 * the GNU Lesser General Public License as published by the Free 13 Software Foundation; either version 3 of the License, or (at your 14 option) any later version. 15 16or 17 18 * the GNU General Public License as published by the Free Software 19 Foundation; either version 2 of the License, or (at your option) any 20 later version. 21 22or both in parallel, as here. 23 24The GNU MP Library is distributed in the hope that it will be useful, but 25WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 26or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 27for more details. 28 29You should have received copies of the GNU General Public License and the 30GNU Lesser General Public License along with the GNU MP Library. If not, 31see https://www.gnu.org/licenses/. */ 32 33#include <stdio.h> 34#include "gmp-impl.h" 35#include "longlong.h" 36 37size_t 38mpz_out_str (FILE *stream, int base, mpz_srcptr x) 39{ 40 mp_ptr xp; 41 mp_size_t x_size = SIZ (x); 42 unsigned char *str; 43 size_t str_size; 44 size_t i; 45 size_t written; 46 const char *num_to_text; 47 TMP_DECL; 48 49 if (stream == 0) 50 stream = stdout; 51 52 num_to_text = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"; 53 if (base > 1) 54 { 55 if (base <= 36) 56 num_to_text = "0123456789abcdefghijklmnopqrstuvwxyz"; 57 else if (UNLIKELY (base > 62)) 58 return 0; 59 } 60 else if (base > -2) 61 { 62 base = 10; 63 } 64 else 65 { 66 base = -base; 67 if (UNLIKELY (base > 36)) 68 return 0; 69 } 70 71 written = 0; 72 73 if (x_size < 0) 74 { 75 fputc ('-', stream); 76 x_size = -x_size; 77 written = 1; 78 } 79 80 TMP_MARK; 81 82 DIGITS_IN_BASE_PER_LIMB (str_size, x_size, base); 83 str_size += 3; 84 str = (unsigned char *) TMP_ALLOC (str_size); 85 86 xp = PTR (x); 87 if (! POW2_P (base)) 88 { 89 xp = TMP_ALLOC_LIMBS (x_size | 1); /* |1 in case x_size==0 */ 90 MPN_COPY (xp, PTR (x), x_size); 91 } 92 93 str_size = mpn_get_str (str, base, xp, x_size); 94 95 /* Convert result to printable chars. */ 96 for (i = 0; i < str_size; i++) 97 str[i] = num_to_text[str[i]]; 98 str[str_size] = 0; 99 100 { 101 size_t fwret; 102 fwret = fwrite ((char *) str, 1, str_size, stream); 103 written += fwret; 104 } 105 106 TMP_FREE; 107 return ferror (stream) ? 0 : written; 108} 109