1 /* mpz_out_str(stream, base, integer) -- Output to STREAM the multi prec. 2 integer INTEGER in base BASE. 3 4 Copyright 1991, 1993, 1994, 1996, 2001, 2005, 2011, 2012 Free Software 5 Foundation, Inc. 6 7 This file is part of the GNU MP Library. 8 9 The GNU MP Library is free software; you can redistribute it and/or modify 10 it 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 16 or 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 22 or both in parallel, as here. 23 24 The GNU MP Library is distributed in the hope that it will be useful, but 25 WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 26 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 27 for more details. 28 29 You should have received copies of the GNU General Public License and the 30 GNU Lesser General Public License along with the GNU MP Library. If not, 31 see https://www.gnu.org/licenses/. */ 32 33 #include <stdio.h> 34 #include "gmp.h" 35 #include "gmp-impl.h" 36 #include "longlong.h" 37 38 size_t 39 mpz_out_str (FILE *stream, int base, mpz_srcptr x) 40 { 41 mp_ptr xp; 42 mp_size_t x_size = SIZ (x); 43 unsigned char *str; 44 size_t str_size; 45 size_t i; 46 size_t written; 47 const char *num_to_text; 48 TMP_DECL; 49 50 if (stream == 0) 51 stream = stdout; 52 53 if (base >= 0) 54 { 55 num_to_text = "0123456789abcdefghijklmnopqrstuvwxyz"; 56 if (base <= 1) 57 base = 10; 58 else if (base > 36) 59 { 60 num_to_text = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"; 61 if (base > 62) 62 return 0; 63 } 64 } 65 else 66 { 67 base = -base; 68 if (base <= 1) 69 base = 10; 70 else if (base > 36) 71 return 0; 72 num_to_text = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ"; 73 } 74 75 written = 0; 76 77 if (x_size < 0) 78 { 79 fputc ('-', stream); 80 x_size = -x_size; 81 written = 1; 82 } 83 84 TMP_MARK; 85 86 DIGITS_IN_BASE_PER_LIMB (str_size, x_size, base); 87 str_size += 3; 88 str = (unsigned char *) TMP_ALLOC (str_size); 89 90 xp = PTR (x); 91 if (! POW2_P (base)) 92 { 93 xp = TMP_ALLOC_LIMBS (x_size | 1); /* |1 in case x_size==0 */ 94 MPN_COPY (xp, PTR (x), x_size); 95 } 96 97 str_size = mpn_get_str (str, base, xp, x_size); 98 99 /* Convert result to printable chars. */ 100 for (i = 0; i < str_size; i++) 101 str[i] = num_to_text[str[i]]; 102 str[str_size] = 0; 103 104 { 105 size_t fwret; 106 fwret = fwrite ((char *) str, 1, str_size, stream); 107 written += fwret; 108 } 109 110 TMP_FREE; 111 return ferror (stream) ? 0 : written; 112 } 113