mirror of
https://github.com/lcn2/calc.git
synced 2025-08-16 01:03:29 +03:00
136 lines
3.4 KiB
C
136 lines
3.4 KiB
C
/*
|
|
* have_varvs - try <varargs.h> to see if it really works with vsprintf()
|
|
*
|
|
* 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.
|
|
*/
|
|
/*
|
|
* Copyright (c) 1995 by Landon Curt Noll. All Rights Reserved.
|
|
*
|
|
* Permission to use, copy, modify, and distribute this software and
|
|
* its documentation for any purpose and without fee is hereby granted,
|
|
* provided that the above copyright, this permission notice and text
|
|
* this comment, and the disclaimer below appear in all of the following:
|
|
*
|
|
* supporting documentation
|
|
* source copies
|
|
* source works derived from this source
|
|
* binaries derived from this source or from derived source
|
|
*
|
|
* LANDON CURT NOLL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
|
|
* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO
|
|
* EVENT SHALL LANDON CURT NOLL BE LIABLE FOR ANY SPECIAL, INDIRECT OR
|
|
* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF
|
|
* USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
|
|
* OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
|
|
* PERFORMANCE OF THIS SOFTWARE.
|
|
*
|
|
* chongo was here /\../\
|
|
*/
|
|
|
|
#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
|
|
|
|
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);
|
|
}
|
|
|
|
#else
|
|
|
|
void
|
|
try_this(char *a, 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)
|
|
/* <stdarg.h> with vsprintf() didn't work */
|
|
#else
|
|
/* <stdarg.h> with sprintf() simulating vsprintf() 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()? */");
|
|
#if !defined(DONT_HAVE_VSPRINTF)
|
|
puts("#define HAVE_VS /* 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. Hope for the best!");
|
|
puts(" */");
|
|
puts("#define vsprintf sprintf");
|
|
puts("#undef HAVE_VS");
|
|
#endif
|
|
/* exit(0); */
|
|
return 0;
|
|
}
|