ihost/libukcprog/strnf.c

/* strnf.c -- like sprintf, but with a buffer size argument */

/*  Copyright 1992  Mark Russell, University of Kent at Canterbury.
 *
 *  You can do what you like with this source code as long as
 *  you don't try to make money out of it and you include an
 *  unaltered copy of this message (including the copyright).
 */

char ukcprog_strnf_sccsid[] = "$Id: strnf.c,v 1.7 1993/10/25 11:40:55 mtr Exp $ UKC";

#ifdef __STDC__
#include <stdarg.h>
#else
#include <varargs.h>
#endif

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#ifndef __STDC__
#include <memory.h>
#endif

#include "ukcprog.h"


#ifdef __STDC__
void
strnf(char *buf, size_t bufsize, const char *fmt, ...)
{

#else /* !__STDC__ */
void
strnf(va_alist)
va_dcl
{
        char *buf;
        int bufsize;
        char *fmt;
#endif /* !__STDC__ */
        va_list args;
        char *s;

#ifdef __STDC__
        va_start(args, fmt);
#else
        va_start(args);
        buf = va_arg(args, char *);
        bufsize = va_arg(args, size_t);
        fmt = va_arg(args, char *);
#endif

        s = formf(buf, (int)bufsize, fmt, args);

        va_end(args);

        /*  If formf had to allocate a buffer then the supplied buf
         *  was too small.  Copy what will fit and free the formf buffer.
         */
        if (s != buf) {
                memcpy(buf, s, (size_t)(bufsize - 1));
                buf[bufsize - 1] = '\0';
                free(s);
        }
}
Revision:	1.1
Committed:	Fri Mar 8 14:37:29 2002 UTC (22 years, 8 months ago) by tdb
Content type:	text/plain
Branch:	MAIN
CVS Tags:	IHOST_1_5_3, IHOST_1_5_2, IHOST_1_5_1, IHOST_1_5, IHOST_1_0_RC1
Log Message:	I'm not usually up for putting third party sources in here, but in this case I'll make an exception. This is ukcprog, a set of useful C functions which the ihost plugins Pete's writing uses. It's got a pretty free license too. I've munged the Makefile around, as all it needs to do now is make the library, not install anything. The idea is to statically compile the other programs against this library, making the final binary independent of this code etc.
#	Content
1	/* strnf.c -- like sprintf, but with a buffer size argument */
2
3	/* Copyright 1992 Mark Russell, University of Kent at Canterbury.
4	*
5	* You can do what you like with this source code as long as
6	* you don't try to make money out of it and you include an
7	* unaltered copy of this message (including the copyright).
8	*/
9
10	char ukcprog_strnf_sccsid[] = "$Id: strnf.c,v 1.7 1993/10/25 11:40:55 mtr Exp $ UKC";
11
12	#ifdef __STDC__
13	#include <stdarg.h>
14	#else
15	#include <varargs.h>
16	#endif
17
18	#include <stdio.h>
19	#include <stdlib.h>
20	#include <string.h>
21	#ifndef __STDC__
22	#include <memory.h>
23	#endif
24
25	#include "ukcprog.h"
26
27
28	#ifdef __STDC__
29	void
30	strnf(char buf, size_t bufsize, const char fmt, ...)
31	{
32
33	#else /* !__STDC__ */
34	void
35	strnf(va_alist)
36	va_dcl
37	{
38	char *buf;
39	int bufsize;
40	char *fmt;
41	#endif /* !__STDC__ */
42	va_list args;
43	char *s;
44
45	#ifdef __STDC__
46	va_start(args, fmt);
47	#else
48	va_start(args);
49	buf = va_arg(args, char *);
50	bufsize = va_arg(args, size_t);
51	fmt = va_arg(args, char *);
52	#endif
53
54	s = formf(buf, (int)bufsize, fmt, args);
55
56	va_end(args);
57
58	/* If formf had to allocate a buffer then the supplied buf
59	* was too small. Copy what will fit and free the formf buffer.
60	*/
61	if (s != buf) {
62	memcpy(buf, s, (size_t)(bufsize - 1));
63	buf[bufsize - 1] = '\0';
64	free(s);
65	}
66	}