88 lines
2.1 KiB
C
88 lines
2.1 KiB
C
/* __gmp_sscanf_funs -- support for formatted input from a string.
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THE FUNCTIONS IN THIS FILE ARE FOR INTERNAL USE ONLY. THEY'RE ALMOST
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CERTAIN TO BE SUBJECT TO INCOMPATIBLE CHANGES OR DISAPPEAR COMPLETELY IN
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FUTURE GNU MP RELEASES.
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Copyright 2001, 2002 Free Software Foundation, Inc.
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This file is part of the GNU MP Library.
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The GNU MP Library is free software; you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or (at your
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option) any later version.
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The GNU MP Library is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
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License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with the GNU MP Library; see the file COPYING.LIB. If not, write to
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the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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MA 02110-1301, USA. */
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#include <stdio.h>
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#include "gmp.h"
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#include "gmp-impl.h"
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static int
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scan (const char **sp, const char *fmt, void *p1, void *p2)
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{
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return sscanf (*sp, fmt, p1, p2);
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}
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static void
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step (const char **sp, int n)
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{
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ASSERT (n >= 0);
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/* shouldn't push us past the the end of the string */
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#if WANT_ASSERT
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{
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int i;
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for (i = 0; i < n; i++)
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ASSERT ((*sp)[i] != '\0');
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}
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#endif
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(*sp) += n;
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}
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static int
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get (const char **sp)
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{
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const char *s;
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int c;
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s = *sp;
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c = (unsigned char) *s++;
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if (c == '\0')
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return EOF;
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*sp = s;
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return c;
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}
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static void
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unget (int c, const char **sp)
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{
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const char *s;
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s = *sp;
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if (c == EOF)
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{
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ASSERT (*s == '\0');
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return;
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}
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s--;
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ASSERT ((unsigned char) *s == c);
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*sp = s;
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}
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const struct gmp_doscan_funs_t __gmp_sscanf_funs = {
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(gmp_doscan_scan_t) scan,
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(gmp_doscan_step_t) step,
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(gmp_doscan_get_t) get,
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(gmp_doscan_unget_t) unget,
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};
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