diff options
Diffstat (limited to 'Build/source/libs/gmp/gmp-6.0.0/mpq/get_str.c')
-rw-r--r-- | Build/source/libs/gmp/gmp-6.0.0/mpq/get_str.c | 76 |
1 files changed, 76 insertions, 0 deletions
diff --git a/Build/source/libs/gmp/gmp-6.0.0/mpq/get_str.c b/Build/source/libs/gmp/gmp-6.0.0/mpq/get_str.c new file mode 100644 index 00000000000..8fa0de1cd74 --- /dev/null +++ b/Build/source/libs/gmp/gmp-6.0.0/mpq/get_str.c @@ -0,0 +1,76 @@ +/* mpq_get_str -- mpq to string conversion. + +Copyright 2001, 2002, 2006, 2011 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 either: + + * 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. + +or + + * the GNU General Public License as published by the Free Software + Foundation; either version 2 of the License, or (at your option) any + later version. + +or both in parallel, as here. + +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 General Public License +for more details. + +You should have received copies of the GNU General Public License and the +GNU Lesser General Public License along with the GNU MP Library. If not, +see https://www.gnu.org/licenses/. */ + +#include <stdio.h> +#include <string.h> +#include "gmp.h" +#include "gmp-impl.h" +#include "longlong.h" + +char * +mpq_get_str (char *str, int base, mpq_srcptr q) +{ + size_t str_alloc, len; + + if (base > 62 || base < -36) + return NULL; + + str_alloc = 0; + if (str == NULL) + { + /* This is an overestimate since we don't bother checking how much of + the high limbs of num and den are used. +2 for rounding up the + chars per bit of num and den. +3 for sign, slash and '\0'. */ + DIGITS_IN_BASE_PER_LIMB (str_alloc, ABSIZ(NUM(q)) + SIZ(DEN(q)), ABS(base)); + str_alloc += 6; + + str = (char *) (*__gmp_allocate_func) (str_alloc); + } + + mpz_get_str (str, base, mpq_numref(q)); + len = strlen (str); + if (! MPZ_EQUAL_1_P (mpq_denref (q))) + { + str[len++] = '/'; + mpz_get_str (str+len, base, mpq_denref(q)); + len += strlen (str+len); + } + + ASSERT (len == strlen(str)); + ASSERT (str_alloc == 0 || len+1 <= str_alloc); + ASSERT (len+1 <= /* size recommended to applications */ + mpz_sizeinbase (mpq_numref(q), ABS(base)) + + mpz_sizeinbase (mpq_denref(q), ABS(base)) + 3); + + if (str_alloc != 0) + __GMP_REALLOCATE_FUNC_MAYBE_TYPE (str, str_alloc, len+1, char); + + return str; +} |