diff options
Diffstat (limited to 'vendor/gmp-6.3.0/mpf/inp_str.c')
-rw-r--r-- | vendor/gmp-6.3.0/mpf/inp_str.c | 92 |
1 files changed, 92 insertions, 0 deletions
diff --git a/vendor/gmp-6.3.0/mpf/inp_str.c b/vendor/gmp-6.3.0/mpf/inp_str.c new file mode 100644 index 0000000..c661a79 --- /dev/null +++ b/vendor/gmp-6.3.0/mpf/inp_str.c @@ -0,0 +1,92 @@ +/* mpf_inp_str(dest_float, stream, base) -- Input a number in base + BASE from stdio stream STREAM and store the result in DEST_FLOAT. + +Copyright 1996, 2000-2002, 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 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 <ctype.h> +#include "gmp-impl.h" + +size_t +mpf_inp_str (mpf_ptr rop, FILE *stream, int base) +{ + char *str; + size_t alloc_size, str_size; + int c; + int res; + size_t nread; + + if (stream == 0) + stream = stdin; + + alloc_size = 100; + str = __GMP_ALLOCATE_FUNC_TYPE (alloc_size, char); + str_size = 0; + nread = 0; + + /* Skip whitespace. */ + do + { + c = getc (stream); + nread++; + } + while (isspace (c)); + + for (;;) + { + if (str_size >= alloc_size) + { + size_t old_alloc_size = alloc_size; + alloc_size = alloc_size * 3 / 2; + str = __GMP_REALLOCATE_FUNC_TYPE (str, old_alloc_size, alloc_size, char); + } + if (c == EOF || isspace (c)) + break; + str[str_size++] = c; + c = getc (stream); + } + ungetc (c, stream); + nread--; + + if (str_size >= alloc_size) + { + size_t old_alloc_size = alloc_size; + alloc_size = alloc_size * 3 / 2; + str = __GMP_REALLOCATE_FUNC_TYPE (str, old_alloc_size, alloc_size, char); + } + str[str_size] = 0; + + res = mpf_set_str (rop, str, base); + (*__gmp_free_func) (str, alloc_size); + + if (res == -1) + return 0; /* error */ + + return str_size + nread; +} |