[lttv.git] / ltt / branches / poly / lttv / main / filter.c


   consist in AND, OR and NOT nested expressions, forming a tree with 
   simple relations as leaves. The simple relations test is a field
   in an event is equal, not equal, smaller, smaller or equal, larger, or
   larger or equal to a specified value. */

typedef enum _lttv_expression_op
{ LTTV_FIELD_EQ,
  LTTV_FIELD_NE,
  LTTV_FIELD_LT,
  LTTV_FIELD_LE,
  LTTV_FIELD_GT,
  LTTV_FIELD_GE
} lttv_expression_op;

typedef _lttv_simple_expression
{ lttv_expression_op op;
  char *field_name;
  char *value;
} lttv_simple_expression;

typedef _lttv_expression_type
{ LTTV_EXPRESSION,
  LTTV_SIMPLE_EXPRESSION

}
typedef struct _lttv_expression 
{ bool or;
  bool not;
  bool simple_expression;
  union 
  { lttv_expression *e;
    lttv_field_relation *se;
  } e;
} lttv_expression;

read_token

read_expression
  ( read expr )
  simple expr [ op expr ]

read_simple_expression
  read_field_path [ rel value ]

read_field_path
  read_field_component [. field path]

read_field_component
  name [ \[ value \] ]

data struct:
and/or(left/right)
not(child)
op(left/right)
path(component...) -> field
Commit	Line	Data
48f6f3c2	1
	2	consist in AND, OR and NOT nested expressions, forming a tree with
	3	simple relations as leaves. The simple relations test is a field
	4	in an event is equal, not equal, smaller, smaller or equal, larger, or
	5	larger or equal to a specified value. */
	6
	7	typedef enum _lttv_expression_op
	8	{ LTTV_FIELD_EQ,
	9	LTTV_FIELD_NE,
	10	LTTV_FIELD_LT,
	11	LTTV_FIELD_LE,
	12	LTTV_FIELD_GT,
	13	LTTV_FIELD_GE
	14	} lttv_expression_op;
	15
	16	typedef _lttv_simple_expression
	17	{ lttv_expression_op op;
	18	char *field_name;
	19	char *value;
	20	} lttv_simple_expression;
	21
	22	typedef _lttv_expression_type
	23	{ LTTV_EXPRESSION,
	24	LTTV_SIMPLE_EXPRESSION
	25
	26	}
	27	typedef struct _lttv_expression
	28	{ bool or;
	29	bool not;
	30	bool simple_expression;
	31	union
	32	{ lttv_expression *e;
	33	lttv_field_relation *se;
	34	} e;
	35	} lttv_expression;
	36
	37	read_token
	38
	39	read_expression
	40	( read expr )
	41	simple expr [ op expr ]
	42
	43	read_simple_expression
	44	read_field_path [ rel value ]
	45
	46	read_field_path
	47	read_field_component [. field path]
	48
	49	read_field_component
	50	name [ \[ value \] ]
	51
	52	data struct:
	53	and/or(left/right)
	54	not(child)
	55	op(left/right)
	56	path(component...) -> field
	57
	58