sprintffuns.c
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上传日期:2022-08-06
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- /* __gmp_sprintf_funs -- support for gmp_sprintf and gmp_vsprintf.
- THE FUNCTIONS IN THIS FILE ARE FOR INTERNAL USE ONLY. THEY'RE ALMOST
- CERTAIN TO BE SUBJECT TO INCOMPATIBLE CHANGES OR DISAPPEAR COMPLETELY IN
- FUTURE GNU MP RELEASES.
- Copyright 2001 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 <stdio.h>
- #include <stdlib.h>
- #include <string.h>
- #include "gmp.h"
- #include "gmp-impl.h"
- /* The data parameter "bufp" points to a "char *buf" which is the next
- character to be written, having started as the destination from the
- application. This is then increased each time output is produced. */
- /* If vsprintf returns -1 then pass it upwards. It doesn't matter that
- "*bufp" is ruined in this case, since gmp_doprint will bail out
- immediately anyway. */
- static int
- gmp_sprintf_format (char **bufp, const char *fmt, va_list ap)
- {
- char *buf = *bufp;
- int ret;
- vsprintf (buf, fmt, ap);
- ret = strlen (buf);
- *bufp = buf + ret;
- return ret;
- }
- static int
- gmp_sprintf_memory (char **bufp, const char *str, size_t len)
- {
- char *buf = *bufp;
- *bufp = buf + len;
- memcpy (buf, str, len);
- return len;
- }
- static int
- gmp_sprintf_reps (char **bufp, int c, int reps)
- {
- char *buf = *bufp;
- ASSERT (reps >= 0);
- *bufp = buf + reps;
- memset (buf, c, reps);
- return reps;
- }
- static int
- gmp_sprintf_final (char **bufp, int c, int reps)
- {
- char *buf = *bufp;
- *buf = ' ';
- return 0;
- }
- const struct doprnt_funs_t __gmp_sprintf_funs = {
- (doprnt_format_t) gmp_sprintf_format,
- (doprnt_memory_t) gmp_sprintf_memory,
- (doprnt_reps_t) gmp_sprintf_reps,
- (doprnt_final_t) gmp_sprintf_final
- };