| 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 | |