libmpdserver

 1#ifndef MPDSERVER_H
 2#define MPDSERVER_H
 3
 4#include <stdbool.h>
 5
 6#include <sys/types.h>
 7
 8typedef enum {
 9	MPD_VAL_INT,
10	MPD_VAL_UINT,
11	MPD_VAL_STR,
12	MPD_VAL_FLOAT,
13	MPD_VAL_BOOL,
14	MPD_VAL_RANGE,
15	MPD_VAL_EXPR,
16	MPD_VAL_CMD,
17
18	MPD_VAL_EXPR_STR, /* only used internally */
19} mpd_val_t;
20
21typedef enum {
22	MPD_OP_NONE,     /* base, modified-since, AND and NOT */
23	MPD_OP_EQUAL,    /* == */
24	MPD_OP_NEQUAL,   /* != */
25	MPD_OP_CONTAINS, /* contains (tag only) */
26	MPD_OP_MATCH,    /* =~ */
27	MPD_OP_NMATCH,   /* !~ (tag only) */
28} mpd_operation_t;
29
30typedef struct _mpd_argument_t mpd_argument_t;
31
32typedef struct {
33	char *name;
34	size_t argc;
35	mpd_argument_t **argv;
36} mpd_command_t;
37
38typedef struct _mpd_expression_t mpd_expression_t;
39
40/* This data structure is a bit clumsy and might change in the future */
41struct _mpd_expression_t {
42	char *name;
43	mpd_operation_t op;
44
45	union {
46		char *str;
47		mpd_expression_t *expr;
48	} o1;
49	mpd_expression_t *next; /* only used by AND */
50};
51
52typedef struct {
53	size_t start;
54	ssize_t end; /* -1 if end is omitted */
55} mpd_range_t;
56
57struct _mpd_argument_t {
58	mpd_val_t type;
59	union {
60		int ival;
61		unsigned int uval;
62		char *sval;
63		float fval;
64		bool bval;
65		mpd_range_t rval;
66		mpd_expression_t *eval;
67		mpd_command_t *cmdval;
68	} v;
69};
70
71/* When reading mpd_parse() input from a stream it is insufficient to
72 * simply read a single line since lists are mulitline commands. */
73
74mpd_command_t *mpd_parse(char *);
75void mpd_free_command(mpd_command_t *);
76
77#endif