vsscanf.c
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上传日期:2022-08-06
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- /* gmp_vsscanf -- formatted input from a string.
- Copyright 2001, 2002 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 "config.h"
- #if HAVE_STDARG
- #include <stdarg.h>
- #else
- #include <varargs.h>
- #endif
- #include <string.h>
- #include "gmp.h"
- #include "gmp-impl.h"
- int
- gmp_vsscanf (const char *s, const char *fmt, va_list ap)
- {
- #if SSCANF_WRITABLE_INPUT
- /* We only actually need this if there's standard C types in fmt, and if
- "s" is not already writable, but it's too much trouble to check that,
- and in any case this writable sscanf input business is only for a few
- old systems. */
- size_t size;
- char *alloc;
- int ret;
- size = strlen (s) + 1;
- alloc = (char *) (*__gmp_allocate_func) (size);
- memcpy (alloc, s, size);
- s = alloc;
- ret = __gmp_doscan (&__gmp_sscanf_funs, (void *) &s, fmt, ap);
- (*__gmp_free_func) (alloc, size);
- return ret;
- #else
- return __gmp_doscan (&__gmp_sscanf_funs, (void *) &s, fmt, ap);
- #endif
- }