1/*- 2 * Copyright (c) 1990, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * Chris Torek. 7 * 8 * Redistribution and use in source and binary forms, with or without --- 20 unchanged lines hidden (view full) --- 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 */ 32 33#if defined(LIBC_SCCS) && !defined(lint) 34static char sccsid[] = "@(#)snprintf.c 8.1 (Berkeley) 6/4/93"; 35#endif /* LIBC_SCCS and not lint */ 36#include <sys/cdefs.h> |
37__FBSDID("$FreeBSD: head/lib/libc/stdio/snprintf.c 205021 2010-03-11 17:03:32Z jhb $"); |
38 39#include <limits.h> 40#include <stdio.h> 41#include <stdarg.h> 42 43#include "local.h" 44 45int 46snprintf(char * __restrict str, size_t n, char const * __restrict fmt, ...) 47{ 48 size_t on; 49 int ret; 50 va_list ap; |
51 FILE f = FAKE_FILE; |
52 53 on = n; 54 if (n != 0) 55 n--; 56 if (n > INT_MAX) 57 n = INT_MAX; 58 va_start(ap, fmt); |
59 f._flags = __SWR | __SSTR; 60 f._bf._base = f._p = (unsigned char *)str; 61 f._bf._size = f._w = n; |
62 ret = __vfprintf(&f, fmt, ap); 63 if (on > 0) 64 *f._p = '\0'; 65 va_end(ap); 66 return (ret); 67} |