Vary header.

Defines
#define	HTTP_VARY_INIT()
	Initializer for structure http_vary_t.
#define	HTTPTAG_VARY(x)
	Tag list item for pointer to a Vary header object.
#define	HTTPTAG_VARY_STR(s)
	Tag list item for string with Vary header value.
Enumerations
enum	{ http_vary_hash }
Functions
http_vary_t *	http_vary_init (http_vary_t x[1])
	Initialize a structure http_vary_t.
int	http_is_vary (http_header_t const *header)
	Test if header object is instance of http_vary_t.
http_vary_t *	http_vary_dup (su_home_t *home, http_vary_t const *hdr))
	Duplicate (deep copy) http_vary_t.
http_vary_t *	http_vary_copy (su_home_t *home, http_vary_t const *hdr))
	Copy a http_vary_t header structure.
http_vary_t *	http_vary_make (su_home_t *home, char const *s))
	Make a header structure http_vary_t.
http_vary_t *	http_vary_format (su_home_t *home, char const *fmt,...)))
	Make a Vary header from formatting result.
Variables
msg_hclass_t	http_vary_class []
	Header class for HTTP Vary header.
msg_parse_f	http_vary_d
	Decode (parse) a Vary header.
msg_print_f	http_vary_e
	Encode (print) a Vary header.

---

Define Documentation

#define HTTP_VARY_INIT

(

)

Initializer for structure http_vary_t.

A static http_vary_t structure must be initialized with the HTTP_VARY_INIT() macro. For instance,

  http_vary_t http_vary = HTTP_VARY_INIT;

#define HTTPTAG_VARY

(

x

)

Tag list item for pointer to a Vary header object.

The HTTPTAG_VARY() macro is used to include a tag item with a pointer to a http_vary_t object in a tag list.

Parameters:

x

pointer to a http_vary_t header structure, or NULL.

#define HTTPTAG_VARY_STR

(

s

)

Tag list item for string with Vary header value.

The HTTPTAG_VARY_STR() macro is used to include a tag item with a string containing value of a http_vary_t header in a tag list.

Parameters:

s

pointer to a string containing http_vary_t value, or NULL.

The HTTPTAG_VARY_STR string can be converted to a http_vary_t header structure by giving the string s has second argument to function http_vary_make().

---

Enumeration Type Documentation

anonymous enum

Enumerator:

http_vary_hash

Hash of Vary header.

---

Function Documentation

int http_is_vary

(

http_header_t const *

header

)

[inline]

Test if header object is instance of http_vary_t.

The function http_is_vary() returns true (nonzero) if the header class is an instance of Vary header object and false (zero) otherwise.

Parameters:

header

pointer to the header structure to be tested

Returns:

The function http_is_xvary() returns true (nonzero) if the header object is an instance of header vary and false (zero) otherwise.

http_vary_t * http_vary_copy	(	su_home_t *	home,
		http_vary_t const *	hdr
	)			[inline]

Copy a http_vary_t header structure.

The function http_vary_copy() copies a header structure hdr. If the header structure hdr contains a reference (hdr->h_next) to a list of headers, all the headers in that list are copied, too. The function uses given memory home to allocate all the memory areas used to copy the header structure hdr.

Parameters:

	home	memory home used to allocate new structure
	hdr	pointer to the header structure to be duplicated

When copying, only the header structure and parameter lists attached to it are duplicated. The new header structure retains all the references to the strings within the old header, including the encoding of the old header, if present.

Example

   vary = http_vary_copy(home, http->http_vary);

Returns:

The function http_vary_copy() returns a pointer to newly copied header structure, or NULL upon an error.

http_vary_t * http_vary_dup	(	su_home_t *	home,
		http_vary_t const *	hdr
	)			[inline]

Duplicate (deep copy) http_vary_t.

The function http_vary_dup() duplicates a header structure hdr. If the header structure hdr contains a reference (hdr->x_next) to a list of headers, all the headers in the list are duplicated, too.

Parameters:

	home	memory home used to allocate new structure
	hdr	header structure to be duplicated

When duplicating, all parameter lists and non-constant strings attached to the header are copied, too. The function uses given memory home to allocate all the memory areas used to copy the header.

Example

   vary = http_vary_dup(home, http->http_vary);

Returns:

The function http_vary_dup() returns a pointer to the newly duplicated http_vary_t header structure, or NULL upon an error.

http_vary_t * http_vary_format	(	su_home_t *	home,
		char const *	fmt,
			...
	)			[inline]

Make a Vary header from formatting result.

The function http_vary_format() makes a new Vary header object using formatting result as its value. The function first prints the arguments according to the format fmt specified. Then it allocates a new header structure, and uses the formatting result as the header value.

Parameters:

	home	memory home used to allocate new header structure.
	fmt	string used as a printf()-style format
	...	argument list for format

Note:

This function is usually implemented as a macro calling msg_header_format().

Returns:

The function http_vary_format() returns a pointer to newly makes header structure, or NULL upon an error.

http_vary_t* http_vary_init

(

http_vary_t

x[1]

)

[inline]

Initialize a structure http_vary_t.

An http_vary_t structure can be initialized with the http_vary_init() function/macro. For instance,

  http_vary_t http_vary;

  http_vary_init(&http_vary);

http_vary_t * http_vary_make	(	su_home_t *	home,
		char const *	s
	)			[inline]

Make a header structure http_vary_t.

The function http_vary_make() makes a new http_vary_t header structure. It allocates a new header structure, and decodes the string s as the value of the structure.

Parameters:

	home	memory home used to allocate new header structure.
	s	string to be decoded as value of the new header structure

Note:

This function is usually implemented as a macro calling http_header_make().

Returns:

The function http_vary_make() returns a pointer to newly maked http_vary_t header structure, or NULL upon an error.

---

Variable Documentation

msg_hclass_t http_vary_class[]

Header class for HTTP Vary header.

The header class http_vary_class defines how a HTTP Vary header is parsed and printed. It also contains methods used by HTTP parser and other functions to manipulate the http_vary_t header structure.