va_start(3) [posix man page]

VA_ARG(P)						     POSIX Programmer's Manual							 VA_ARG(P)

NAME

       va_arg, va_copy, va_end, va_start - handle variable argument list

SYNOPSIS

       #include <stdarg.h>

	type va_arg(va_list ap, type);
       void va_copy(va_list dest, va_list src);
       void va_end(va_list ap);
       void va_start(va_list ap, argN);

DESCRIPTION

       Refer to the Base Definitions volume of IEEE Std 1003.1-2001, <stdarg.h>.

COPYRIGHT

       Portions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1, 2003 Edition, Standard for Information Technol-
       ogy -- Portable Operating System Interface (POSIX), The Open Group Base Specifications Issue 6, Copyright (C) 2001-2003 by the Institute of
       Electrical  and	Electronics  Engineers, Inc and The Open Group. In the event of any discrepancy between this version and the original IEEE
       and The Open Group Standard, the original IEEE and The Open Group Standard is the referee document. The original Standard can  be  obtained
       online at http://www.opengroup.org/unix/online.html .

IEEE
/The Open Group						       2003								 VA_ARG(P)

VFPRINTF(P)						     POSIX Programmer's Manual						       VFPRINTF(P)

NAME

       vfprintf, vprintf, vsnprintf, vsprintf - format output of a stdarg argument list

SYNOPSIS

       #include <stdarg.h>
       #include <stdio.h>

       int vfprintf(FILE *restrict stream, const char *restrict format,
	      va_list ap);
       int vprintf(const char *restrict format, va_list ap);
       int vsnprintf(char *restrict s, size_t n, const char *restrict format,
	      va_list ap);
       int vsprintf(char *restrict s, const char *restrict format, va_list ap);

DESCRIPTION

       The  vprintf(),	vfprintf(),  vsnprintf(),  and	vsprintf() functions shall be equivalent to printf(), fprintf(), snprintf(), and sprintf()
       respectively, except that instead of being called with a variable number of arguments, they are called with an argument list as defined	by
       <stdarg.h>.

       These functions shall not invoke the va_end macro. As these functions invoke the va_arg macro, the value of ap after the return is unspeci-
       fied.

RETURN VALUE

       Refer to fprintf() .

ERRORS

       Refer to fprintf() .

       The following sections are informative.

EXAMPLES

       None.

APPLICATION USAGE

       Applications using these functions should call va_end(ap) afterwards to clean up.

RATIONALE

       None.

FUTURE DIRECTIONS

       None.

SEE ALSO

       fprintf() , the Base Definitions volume of IEEE Std 1003.1-2001, <stdarg.h>, <stdio.h>

COPYRIGHT

       Portions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1, 2003 Edition, Standard for Information Technol-
       ogy -- Portable Operating System Interface (POSIX), The Open Group Base Specifications Issue 6, Copyright (C) 2001-2003 by the Institute of
       Electrical and Electronics Engineers, Inc and The Open Group. In the event of any discrepancy between this version and  the  original  IEEE
       and  The  Open Group Standard, the original IEEE and The Open Group Standard is the referee document. The original Standard can be obtained
       online at http://www.opengroup.org/unix/online.html .

IEEE
/The Open Group						       2003							       VFPRINTF(P)