mirror of
https://github.com/lcn2/calc.git
synced 2025-08-19 01:13:27 +03:00
a31078bbec
Some folks might think: “you still use RCS”?!? And we will say, hey, at least we switched from SCCS to RCS back in … I think it was around 1994 ... at least we are keeping up! :-) :-) :-) Logs say that SCCS version 18 became RCS version 19 on 1994 March 18. RCS served us well. But now it is time to move on. And so we are switching to git. Calc releases produce a lot of file changes. In the 125 releases of calc since 1996, when I started managing calc releases, there have been 15473 file mods!
195 lines
4.7 KiB
C
195 lines
4.7 KiB
C
/*
|
|
* have_varvs - try <varargs.h> to see if it really works with vsprintf()
|
|
*
|
|
* Copyright (C) 1999 Landon Curt Noll
|
|
*
|
|
* Calc is open software; you can redistribute it and/or modify it under
|
|
* the terms of the version 2.1 of the GNU Lesser General Public License
|
|
* as published by the Free Software Foundation.
|
|
*
|
|
* Calc 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.
|
|
*
|
|
* A copy of version 2.1 of the GNU Lesser General Public License is
|
|
* distributed with calc under the filename COPYING-LGPL. You should have
|
|
* received a copy with calc; if not, write to Free Software Foundation, Inc.
|
|
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
|
|
*
|
|
* Under source code control: 1995/09/09 22:41:10
|
|
* File existed as early as: 1995
|
|
*
|
|
* chongo <was here> /\oo/\ http://www.isthe.com/chongo/
|
|
* Share and enjoy! :-) http://www.isthe.com/chongo/tech/comp/calc/
|
|
*/
|
|
|
|
/*
|
|
* Some systems have bugs in the <varargs.h> implementation that show up in
|
|
* vsprintf(), so we may have to try to use sprintf() as if it were vsprintf()
|
|
* and hope for the best.
|
|
*
|
|
* This program will output #defines and exits 0 if vsprintf() (or sprintf())
|
|
* produces the results that we expect. This program exits 1 if vsprintf()
|
|
* (or sprintf()) produces unexpected results while using the <stdarg.h>
|
|
* include file.
|
|
*/
|
|
|
|
|
|
#include <stdio.h>
|
|
|
|
#include "have_unistd.h"
|
|
#if defined(HAVE_UNISTD_H)
|
|
#include <unistd.h>
|
|
#endif
|
|
|
|
#include "have_string.h"
|
|
#ifdef HAVE_STRING_H
|
|
# include <string.h>
|
|
#endif
|
|
|
|
#undef VSPRINTF_SIZE_T
|
|
#if defined(FORCE_STDC) || (defined(__STDC__) && __STDC__ != 0) || \
|
|
defined(__cplusplus)
|
|
# define VSPRINTF_SIZE_T size_t
|
|
#else
|
|
# define VSPRINTF_SIZE_T long
|
|
#endif
|
|
|
|
char buf[BUFSIZ];
|
|
|
|
#if !defined(STDARG) && !defined(SIMULATE_STDARG)
|
|
#include <varargs.h>
|
|
|
|
void
|
|
try_this(char *fmt, ...)
|
|
{
|
|
va_list ap;
|
|
|
|
va_start(ap);
|
|
|
|
#if !defined(DONT_HAVE_VSPRINTF)
|
|
vsprintf(buf, fmt, ap);
|
|
#else
|
|
sprintf(buf, fmt, ap);
|
|
#endif
|
|
|
|
va_end(ap);
|
|
}
|
|
|
|
void
|
|
try_nthis(char *fmt, VSPRINTF_SIZE_T size, ...)
|
|
{
|
|
va_list ap;
|
|
|
|
va_start(ap);
|
|
|
|
#if !defined(DONT_HAVE_VSPRINTF)
|
|
vsnprintf(buf, size, fmt, ap);
|
|
#else
|
|
snprintf(buf, size, fmt, ap);
|
|
#endif
|
|
|
|
va_end(ap);
|
|
}
|
|
|
|
#else
|
|
|
|
void
|
|
try_this(char *a, int b, char *c, int d)
|
|
{
|
|
return;
|
|
}
|
|
|
|
void
|
|
try_nthis(char *a, VSPRINTF_SIZE_T size, int b, char *c, int d)
|
|
{
|
|
return;
|
|
}
|
|
|
|
#endif
|
|
|
|
|
|
int
|
|
main(void)
|
|
{
|
|
/*
|
|
* setup
|
|
*/
|
|
buf[0] = '\0';
|
|
|
|
/*
|
|
* test variable args and vsprintf/sprintf
|
|
*/
|
|
try_this("@%d:%s:%d@", 1, "hi", 2);
|
|
if (strcmp(buf, "@1:hi:2@") != 0) {
|
|
#if !defined(DONT_HAVE_VSPRINTF)
|
|
/* <varargs.h> with vsprintf() didn't work */
|
|
#else
|
|
/* <varargs.h> with sprintf() simulating vsprintf() didn't work */
|
|
#endif
|
|
exit(1);
|
|
}
|
|
try_this("%s %d%s%d%d %s",
|
|
"Landon Noll 1st proved that", 2, "^", 23209, -1, "was prime");
|
|
if (strcmp(buf,
|
|
"Landon Noll 1st proved that 2^23209-1 was prime") != 0) {
|
|
#if !defined(DONT_HAVE_VSPRINTF)
|
|
/* <varargs.h> with vsprintf() didn't work */
|
|
#else
|
|
/* <varargs.h> with sprintf() simulating vsprintf() didn't work */
|
|
#endif
|
|
exit(1);
|
|
}
|
|
|
|
/*
|
|
* test variable args and vsnprintf/snprintf
|
|
*/
|
|
try_nthis("@%d:%s:%d@", sizeof(buf)-1, 1, "hello", 5);
|
|
if (strcmp(buf, "@1:hello:5@") != 0) {
|
|
#if !defined(DONT_HAVE_VSPRINTF)
|
|
/* <varargs.h> with vsnprintf() didn't work */
|
|
#else
|
|
/* <varargs.h> with snprintf() simulating vsnprintf() didn't work */
|
|
#endif
|
|
exit(1);
|
|
}
|
|
try_nthis("%s %d%s%d%d %s", sizeof(buf)-1,
|
|
"Landon Noll 1st proved that", 2, "^", 23209, -1, "was prime");
|
|
if (strcmp(buf,
|
|
"Landon Noll 1st proved that 2^23209-1 was prime") != 0) {
|
|
#if !defined(DONT_HAVE_VSPRINTF)
|
|
/* <varargs.h> with vsnprintf() didn't work */
|
|
#else
|
|
/* <varargs.h> with snprintf() simulating vsnprintf() didn't work */
|
|
#endif
|
|
exit(1);
|
|
}
|
|
|
|
/*
|
|
* report the result
|
|
*/
|
|
puts("/* what type of variable args do we have? */");
|
|
puts("#define VARARGS /* use <varargs.h> */");
|
|
puts("#include <varargs.h>");
|
|
puts("\n/* should we use vsprintf() and vsnprintf()? */");
|
|
#if !defined(DONT_HAVE_VSPRINTF)
|
|
puts("#define HAVE_VSPRINTF /* yes */");
|
|
#else
|
|
puts("/*");
|
|
puts(" * Hack aleart!!!");
|
|
puts(" *");
|
|
puts(" * Systems that do not have vsprintf() need something. In some");
|
|
puts(" * cases the sprintf function will deal correctly with the");
|
|
puts(" * va_alist 3rd arg. Same gors for a lack of an vsnprintf()");
|
|
puts(" * function. In either case we use the #defines below and");
|
|
puts(" * hope for the best!");
|
|
puts(" */");
|
|
puts("#define vsprintf sprintf");
|
|
puts("#define vsnprintf snprintf");
|
|
puts("#undef HAVE_VSPRINTF");
|
|
#endif
|
|
/* exit(0); */
|
|
return 0;
|
|
}
|