stdarg.h File Reference

Standard variable argument handling for C. More...

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Macros
#define	va_start(v, l)   __builtin_va_start(v, l)
	@macro va_start
#define	va_arg(v, l)   __builtin_va_arg(v, l)
	@macro va_arg
#define	va_end(v)   __builtin_va_end(v)
	@macro va_end
#define	va_copy(d, s)   __builtin_va_copy(d, s)
	@macro va_copy

Typedefs
typedef __builtin_va_list	va_list
	Type used for variable argument lists.

Detailed Description

Standard variable argument handling for C.

This header file provides macros for handling functions with a variable number of arguments. It defines the type va_list and the associated macros to initialize, access, and clean up variable arguments.

Macro Definition Documentation

va_arg

#define va_arg	(		v,
			l
	)		__builtin_va_arg(v, l)

@macro va_arg

Retrieve the next argument in the variable argument list.

This macro retrieves the next argument from the va_list variable v and advances v to the next argument. The type of the argument to be retrieved is specified by the type l.

Parameters

v	The va_list variable from which to retrieve the argument.
l	The type of the argument to be retrieved.

Returns

The next argument in the variable argument list.

va_copy

#define va_copy	(		d,
			s
	)		__builtin_va_copy(d, s)

@macro va_copy

Copy a va_list variable.

This macro copies the variable argument list from s to d, allowing multiple traversals of the same list.

Parameters

d	The destination va_list variable.
s	The source va_list variable to be copied.

va_end

#define va_end

(

v

)

__builtin_va_end(v)

@macro va_end

Clean up the va_list variable.

This macro performs any necessary cleanup for the va_list variable v after all variable arguments have been accessed.

Parameters

v	The va_list variable to be cleaned up.

va_start

#define va_start	(		v,
			l
	)		__builtin_va_start(v, l)

@macro va_start

Initialize a va_list for variable argument access.

This macro initializes the va_list variable v to retrieve the variable arguments, starting after the last named parameter l.

Parameters

v	The va_list variable to be initialized.
l	The last known fixed argument before the variable arguments.

Typedef Documentation

va_list

typedef __builtin_va_list va_list

Type used for variable argument lists.