parser.h File Reference

#include "protocol.h"
#include "compiler.h"
#include <stdbool.h>

Include dependency graph for parser.h:

Go to the source code of this file.

Enumerations
enum	mpd_parser_result { MPD_PARSER_MALFORMED , MPD_PARSER_SUCCESS , MPD_PARSER_ERROR , MPD_PARSER_PAIR }

Functions
struct mpd_parser *	mpd_parser_new (void)
void	mpd_parser_free (struct mpd_parser *parser)
enum mpd_parser_result	mpd_parser_feed (struct mpd_parser *parser, char *line)
bool	mpd_parser_is_discrete (const struct mpd_parser *parser)
enum mpd_server_error	mpd_parser_get_server_error (const struct mpd_parser *parser)
unsigned	mpd_parser_get_at (const struct mpd_parser *parser)
const char *	mpd_parser_get_message (const struct mpd_parser *parser)
const char *	mpd_parser_get_name (const struct mpd_parser *parser)
const char *	mpd_parser_get_value (const struct mpd_parser *parser)

Enumeration Type Documentation

mpd_parser_result

enum mpd_parser_result

Enumerator
MPD_PARSER_MALFORMED	Response line was not understood.
MPD_PARSER_SUCCESS	MPD has returned "OK" or "list_OK" (check with mpd_parser_is_discrete()).
MPD_PARSER_ERROR	MPD has returned "ACK" with an error code. Call mpd_parser_get_server_error() to get the error code.
MPD_PARSER_PAIR	MPD has returned a name-value pair. Call mpd_parser_get_name() and mpd_parser_get_value().

Definition at line 12 of file parser.h.

Function Documentation

mpd_parser_new()

struct mpd_parser * mpd_parser_new

(

void

)

Allocates a new mpd_parser object. Returns NULL on error (out of memory).

mpd_parser_free()

void mpd_parser_free

(

struct mpd_parser *

parser

)

Frees a mpd_parser object.

mpd_parser_feed()

enum mpd_parser_result mpd_parser_feed	(	struct mpd_parser *	parser,
		char *	line
	)

Feeds a line (without the trailing newline character) received from MPD / mpd_async_recv_line() into the parser.

Note that the line parameter is writable, because the parser will modify it. The functions mpd_parser_get_name() and mpd_parser_get_value() will return pointers inside this buffer. This means that after passing the line to this function, you must not modify or free it, until the name and value pointers are not used anymore.

Parameters

parser	the mpd_parser object
line	a line received from the MPD server

Returns

a result code indicating the type of line, or error

mpd_parser_is_discrete()

bool mpd_parser_is_discrete

(

const struct mpd_parser *

parser

)

Call this when mpd_parser_feed() has returned MPD_PARSER_SUCCESS to find out whether this is an "OK" (false) or a "list_OK" (true) response.

Parameters

parser

the mpd_parser object

mpd_parser_get_server_error()

enum mpd_server_error mpd_parser_get_server_error

(

const struct mpd_parser *

parser

)

Call this when mpd_parser_feed() has returned MPD_PARSER_ERROR to obtain the reason for the error.

Parameters

parser

the mpd_parser object

mpd_parser_get_at()

unsigned mpd_parser_get_at

(

const struct mpd_parser *

parser

)

On MPD_PARSER_ERROR, this returns the number of the list command which failed. Don't call this outside of a command list.

Parameters

parser

the mpd_parser object

mpd_parser_get_message()

const char * mpd_parser_get_message

(

const struct mpd_parser *

parser

)

On MPD_PARSER_ERROR, this returns the human readable error message returned by MPD (UTF-8).

This returns a pointer into the line buffer passed to mpd_parser_feed(). It is valid as long as the buffer is not freed/modified.

Parameters

parser

the mpd_parser object

mpd_parser_get_name()

const char * mpd_parser_get_name

(

const struct mpd_parser *

parser

)

On MPD_PARSER_PAIR, this returns the name.

This returns a pointer into the line buffer passed to mpd_parser_feed(). It is valid as long as the buffer is not freed/modified.

Parameters

parser

the mpd_parser object

mpd_parser_get_value()

const char * mpd_parser_get_value

(

const struct mpd_parser *

parser

)

On MPD_PARSER_PAIR, this returns the value.

This returns a pointer into the line buffer passed to mpd_parser_feed(). It is valid as long as the buffer is not freed/modified.

Parameters

parser

the mpd_parser object