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#ifndef HAVE_VPRINTF
#include "choke-me: no vprintf and no snprintf"
#endif
#if defined(HAVE_STDARG_H)
# include <stdarg.h>
# ifndef VA_START
# define VA_START(a, f) va_start(a, f)
# define VA_END(a) va_end(a)
# endif /* VA_START */
# define SNV_USING_STDARG_H
#elif defined(HAVE_VARARGS_H)
# include <varargs.h>
# ifndef VA_START
# define VA_START(a, f) va_start(a)
# define VA_END(a) va_end(a)
# endif /* VA_START */
# undef SNV_USING_STDARG_H
#else
# include "must-have-stdarg-or-varargs"
#endif
static int
snprintf(char *str, size_t n, char const *fmt, ...)
{
va_list ap;
int rval;
#ifdef VSPRINTF_CHARSTAR
char *rp;
VA_START(ap, fmt);
rp = vsprintf(str, fmt, ap);
VA_END(ap);
rval = strlen(rp);
#else
VA_START(ap, fmt);
rval = vsprintf(str, fmt, ap);
VA_END(ap);
#endif
if (rval > n) {
fprintf(stderr, "snprintf buffer overrun %d > %d\n", rval, (int)n);
abort();
}
return rval;
}
static int
vsnprintf( char *str, size_t n, char const *fmt, va_list ap )
{
#ifdef VSPRINTF_CHARSTAR
return (strlen(vsprintf(str, fmt, ap)));
#else
return (vsprintf(str, fmt, ap));
#endif
}
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