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implement snprintf() and vsnprintf() for non BSD4_4 systems.

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This commit is contained in:
christos 1996-12-31 17:56:04 +00:00
parent e43039b92f
commit 59a3352108
1 changed files with 70 additions and 2 deletions
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72
usr.bin/make/util.c
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@ -1,15 +1,16 @@
/* $NetBSD: util.c,v 1.9 1996/11/11 15:16:10 christos Exp $ */
/* $NetBSD: util.c,v 1.10 1996/12/31 17:56:04 christos Exp $ */
/*
* Missing stuff from OS's
*/
#ifndef lint
static char rcsid[] = "$NetBSD: util.c,v 1.9 1996/11/11 15:16:10 christos Exp $";
static char rcsid[] = "$NetBSD: util.c,v 1.10 1996/12/31 17:56:04 christos Exp $";
#endif
#include <stdio.h>
#include "make.h"
#include <sys/param.h>
#if !__STDC__
# ifndef const
@ -350,3 +351,70 @@ signal(s, a)) ()
}
#endif
#ifndef BSD4_4
#ifdef __STDC__
#include <stdarg.h>
#else
#include <varargs.h>
#endif
#ifdef _IOSTRG
#define STRFLAG (_IOSTRG|_IOWRT) /* no _IOWRT: avoid stdio bug */
#else
#define STRFLAG (_IOREAD) /* XXX: Assume svr4 stdio */
#endif
int
vsnprintf(s, n, fmt, args)
char *s;
size_t n;
const char *fmt;
va_list args;
{
FILE fakebuf;
fakebuf._flag = STRFLAG;
/*
* Some os's are char * _ptr, others are unsigned char *_ptr...
* We cast to void * to make everyone happy.
*/
fakebuf._ptr = (void *) s;
fakebuf._cnt = n-1;
fakebuf._file = -1;
_doprnt(fmt, args, &fakebuf);
fakebuf._cnt++;
putc('\0', &fakebuf);
if (fakebuf._cnt<0)
fakebuf._cnt = 0;
return (n-fakebuf._cnt-1);
}
int
#ifdef __STDC__
snprintf(char *s, size_t n, const char *fmt, ...)
#else
snprintf(va_alist)
va_dcl
#endif
{
va_list ap;
int rv;
#ifdef __STDC__
va_start(ap, fmt);
#else
char *s;
size_t n;
const char *fmt;
va_start(ap);
s = va_arg(ap, char *);
n = va_arg(ap, size_t);
fmt = va_arg(ap, const char *);
#endif
rv = vsnprintf(s, n, fmt, ap);
va_end(ap);
return rv;
}
#endif