1/* $NetBSD$ */ 2 3 4#ifndef HAVE_VPRINTF 5#include "choke-me: no vprintf and no snprintf" 6#endif 7 8#if defined(HAVE_STDARG_H) 9# include <stdarg.h> 10# ifndef VA_START 11# define VA_START(a, f) va_start(a, f) 12# define VA_END(a) va_end(a) 13# endif /* VA_START */ 14# define SNV_USING_STDARG_H 15 16#elif defined(HAVE_VARARGS_H) 17# include <varargs.h> 18# ifndef VA_START 19# define VA_START(a, f) va_start(a) 20# define VA_END(a) va_end(a) 21# endif /* VA_START */ 22# undef SNV_USING_STDARG_H 23 24#else 25# include "must-have-stdarg-or-varargs" 26#endif 27 28static int 29snprintf(char *str, size_t n, char const *fmt, ...) 30{ 31 va_list ap; 32 int rval; 33 34#ifdef VSPRINTF_CHARSTAR 35 char *rp; 36 VA_START(ap, fmt); 37 rp = vsprintf(str, fmt, ap); 38 VA_END(ap); 39 rval = strlen(rp); 40 41#else 42 VA_START(ap, fmt); 43 rval = vsprintf(str, fmt, ap); 44 VA_END(ap); 45#endif 46 47 if (rval > n) { 48 fprintf(stderr, "snprintf buffer overrun %d > %d\n", rval, (int)n); 49 abort(); 50 } 51 return rval; 52} 53 54static int 55vsnprintf( char *str, size_t n, char const *fmt, va_list ap ) 56{ 57#ifdef VSPRINTF_CHARSTAR 58 return (strlen(vsprintf(str, fmt, ap))); 59#else 60 return (vsprintf(str, fmt, ap)); 61#endif 62} 63