search.c File Reference

Search implementation. More...

#include "compile_time.h"
#include "src/lib/search.h"
#include "dist/utf8/utf8.h"
#include "src/lib/convert.h"
#include "src/lib/datetime.h"
#include "src/lib/log.h"
#include "src/lib/mem.h"
#include "src/lib/sds_extras.h"
#include <ctype.h>
#include <inttypes.h>
#include <pcre2.h>
#include <string.h>

Include dependency graph for search.c:

Data Structures
struct	t_search_expression

Macros
#define	PCRE2_CODE_UNIT_WIDTH   8

Enumerations
enum	search_operators {   SEARCH_OP_UNKNOWN = -1 , SEARCH_OP_EQUAL , SEARCH_OP_STARTS_WITH , SEARCH_OP_CONTAINS ,   SEARCH_OP_NOT_EQUAL , SEARCH_OP_REGEX , SEARCH_OP_NOT_REGEX , SEARCH_OP_GREATER ,   SEARCH_OP_GREATER_EQUAL }
enum	search_filters {   SEARCH_FILTER_ANY_TAG = -2 , SEARCH_FILTER_MODIFIED_SINCE = -3 , SEARCH_FILTER_ADDED_SINCE = -4 , SEARCH_FILTER_FILE = -5 ,   SEARCH_FILTER_BITRATE = -6 , SEARCH_FILTER_BASE = -7 , SEARCH_FILTER_PRIO = -8 , SEARCH_FILTER_AUDIO_FORMAT = -9 }

Functions
static int	expr_get_tag_song (const char *p, size_t *len)
static int	expr_get_tag_webradio (const char *p, size_t *len)
static int	expr_get_op (const char *p, int tag, size_t *len)
static sds	expr_get_value (const char *p, const char *end, int tag, sds buf, bool *rc)
static bool	expr_parse_value (struct t_search_expression *expr)
static void *	free_search_expression (struct t_search_expression *expr)
static void	free_search_expression_node (struct t_list_node *current)
static pcre2_code *	compile_regex (char *regex_str)
static bool	cmp_regex (pcre2_code *re_compiled, const char *value)
struct t_list *	parse_search_expression_to_list (const char *expression, enum search_type type)
void	free_search_expression_list (struct t_list *expr_list)
bool	search_expression_song (const struct mpd_song *song, const struct t_list *expr_list, const struct t_mympd_mpd_tags *any_tag_types)
bool	search_expression_album (const struct t_album *album, const struct t_list *expr_list, const struct t_mympd_mpd_tags *any_tag_types)
bool	search_expression_webradio (const struct t_webradio_data *webradio, const struct t_list *expr_list, const struct t_webradio_tags *any_tag_types)

Detailed Description

Search implementation.

Macro Definition Documentation

PCRE2_CODE_UNIT_WIDTH

#define PCRE2_CODE_UNIT_WIDTH   8

PCRE for UTF-8

Enumeration Type Documentation

search_filters

enum search_filters

Search filter types

search_operators

enum search_operators

Private definitions Search operators like them from MPD

Function Documentation

cmp_regex()

static bool cmp_regex ( pcre2_code *  re_compiled, const char *  value  )

static

Matches the regex against a string

Parameters

re_compiled	the compiled regex from compile_regex
value	string to match against

Returns

true if regex matches else false

compile_regex()

static pcre2_code * compile_regex ( char *  regex_str )

static

Compiles a string to regex code

Parameters

regex_str

regex string

Returns

regex code

expr_get_op()

static int expr_get_op ( const char *  p, int  tag, size_t *  len  )

static

Extracts the search operator

Parameters

p	Pointer to start of operator in the expression
tag	Filter type
len	Set to count of bytes parsed

Returns

Search operator or -1 on error

expr_get_tag_song()

static int expr_get_tag_song ( const char *  p, size_t *  len  )

static

Private functions Extracts the tag from a song search expression

Parameters

p	Pointer to start of expression
len	Set to count of bytes parsed

Returns

MPD song tag, filter type or -1 on error

expr_get_tag_webradio()

static int expr_get_tag_webradio ( const char *  p, size_t *  len  )

static

Extracts the tag from a webradio search expression

Parameters

p	Pointer to start of expression
len	Set to count of bytes parsed

Returns

Webradio tag, filter type or -1 on error

expr_get_value()

static sds expr_get_value ( const char *  p, const char *  end, int  tag, sds  buf, bool *  rc  )

static

Extracts the value to search for

Parameters

p	Pointer to start of value in the expression
end	Pointer to end of the expression
tag	Filter type
buf	Already allocated sds string to append the value
rc	Set to true on success, else false

Returns

Pointer to buf

expr_parse_value()

static bool expr_parse_value ( struct t_search_expression *  expr )

static

Parses the search expression value

Parameters

expr	The parsed search expression

Returns

true on success, else false

free_search_expression()

static void * free_search_expression ( struct t_search_expression *  expr )

static

Frees the t_search_expression struct

Parameters

expr	pointer to t_search_expression struct

Returns

NULL

free_search_expression_list()

void free_search_expression_list

(

struct t_list *

expr_list

)

Frees the search expression list

Parameters

expr_list

pointer to the list

free_search_expression_node()

static void free_search_expression_node ( struct t_list_node *  current )

static

Callback function for freeing a list node with t_search_expression user_data

Parameters

current

pointer to list node

parse_search_expression_to_list()

struct t_list * parse_search_expression_to_list	(	const char *	expression,
		enum search_type	type
	)

Public functions Parses a mpd search expression

Parameters

expression	mpd search expression
type	type of struct for the search expression

Returns

list of the expression or NULL on error

search_expression_album()

bool search_expression_album	(	const struct t_album *	album,
		const struct t_list *	expr_list,
		const struct t_mympd_mpd_tags *	any_tag_types
	)

Implements search expressions for albums.

Parameters

album	pointer to album struct
expr_list	expression list returned by parse_search_expression
any_tag_types	tags for special "any" tag in expression

Returns

expression result

search_expression_song()

bool search_expression_song	(	const struct mpd_song *	song,
		const struct t_list *	expr_list,
		const struct t_mympd_mpd_tags *	any_tag_types
	)

Implements search expressions for mpd songs.

Parameters

song	pointer to mpd song struct
expr_list	expression list returned by parse_search_expression
any_tag_types	tags for special "any" tag in expression

Returns

expression result

search_expression_webradio()

bool search_expression_webradio	(	const struct t_webradio_data *	webradio,
		const struct t_list *	expr_list,
		const struct t_webradio_tags *	any_tag_types
	)

Implements search expressions for webradios.

Parameters

webradio	pointer to webradio struct
expr_list	expression list returned by parse_search_expression
any_tag_types	tags for special "any" tag in expression

Returns

expression result