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 | |