projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| c9be6cfe KB |
1 | /*- |
| 2 | * Copyright (c) 1990 The Regents of the University of California. | |
| 3 | * All rights reserved. | |
| 4 | * | |
| 5 | * This code is derived from software contributed to Berkeley by | |
| 6 | * Chris Torek. | |
| 7 | * | |
| 8 | * %sccs.include.redist.c% | |
| 9 | */ | |
| 10 | ||
| 11 | #if defined(LIBC_SCCS) && !defined(lint) | |
| 12 | static char sccsid[] = "@(#)snprintf.c 5.1 (Berkeley) %G%"; | |
| 13 | #endif /* LIBC_SCCS and not lint */ | |
| 14 | ||
| 15 | #include <stdio.h> | |
| 16 | #if __STDC__ | |
| 17 | #include <stdarg.h> | |
| 18 | #else | |
| 19 | #include <varargs.h> | |
| 20 | #endif | |
| 21 | ||
| 22 | #if __STDC__ | |
| 23 | snprintf(char *str, size_t n, char const *fmt, ...) | |
| 24 | #else | |
| 25 | snprintf(str, n, fmt, va_alist) | |
| 26 | char *str; | |
| 27 | size_t n; | |
| 28 | char *fmt; | |
| 29 | va_dcl | |
| 30 | #endif | |
| 31 | { | |
| 32 | int ret; | |
| 33 | va_list ap; | |
| 34 | FILE f; | |
| 35 | ||
| 36 | if ((int)n < 1) | |
| 37 | return (EOF); | |
| 38 | #if __STDC__ | |
| 39 | va_start(ap, fmt); | |
| 40 | #else | |
| 41 | va_start(ap); | |
| 42 | #endif | |
| 43 | f._flags = __SWR | __SSTR; | |
| 44 | f._bf._base = f._p = (unsigned char *)str; | |
| 45 | f._bf._size = f._w = n - 1; | |
| 46 | ret = vfprintf(&f, fmt, ap); | |
| 47 | *f._p = 0; | |
| 48 | va_end(ap); | |
| 49 | return (ret); | |
| 50 | } |