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311b4145 SH |
1 | %{ |
2 | #include <stdio.h> | |
3 | #include <stdlib.h> | |
4 | #include <malloc.h> | |
5 | #include <string.h> | |
6 | #include "m_ematch.h" | |
7 | %} | |
8 | ||
9 | %locations | |
311b4145 SH |
10 | %token-table |
11 | %error-verbose | |
12 | %name-prefix="ematch_" | |
13 | ||
14 | %union { | |
15 | unsigned int i; | |
16 | struct bstr *b; | |
17 | struct ematch *e; | |
18 | } | |
19 | ||
20 | %{ | |
737f15f6 | 21 | extern int ematch_lex(void); |
5761f04f | 22 | extern void yyerror(const char *s); |
311b4145 SH |
23 | extern struct ematch *ematch_root; |
24 | extern char *ematch_err; | |
25 | %} | |
26 | ||
27 | %token <i> ERROR | |
28 | %token <b> ATTRIBUTE | |
29 | %token <i> AND OR NOT | |
30 | %type <i> invert relation | |
31 | %type <e> match expr | |
32 | %type <b> args | |
33 | %right AND OR | |
34 | %start input | |
35 | %% | |
36 | input: | |
37 | /* empty */ | |
38 | | expr | |
39 | { ematch_root = $1; } | |
40 | | expr error | |
41 | { | |
42 | ematch_root = $1; | |
43 | YYACCEPT; | |
44 | } | |
45 | ; | |
46 | ||
47 | expr: | |
48 | match | |
49 | { $$ = $1; } | |
50 | | match relation expr | |
51 | { | |
52 | $1->relation = $2; | |
53 | $1->next = $3; | |
54 | $$ = $1; | |
55 | } | |
56 | ; | |
57 | ||
58 | match: | |
59 | invert ATTRIBUTE '(' args ')' | |
60 | { | |
61 | $2->next = $4; | |
62 | $$ = new_ematch($2, $1); | |
63 | if ($$ == NULL) | |
64 | YYABORT; | |
65 | } | |
66 | | invert '(' expr ')' | |
67 | { | |
68 | $$ = new_ematch(NULL, $1); | |
69 | if ($$ == NULL) | |
70 | YYABORT; | |
71 | $$->child = $3; | |
72 | } | |
73 | ; | |
74 | ||
75 | args: | |
76 | ATTRIBUTE | |
77 | { $$ = $1; } | |
78 | | ATTRIBUTE args | |
79 | { $1->next = $2; } | |
80 | ; | |
81 | ||
82 | relation: | |
83 | AND | |
84 | { $$ = TCF_EM_REL_AND; } | |
85 | | OR | |
86 | { $$ = TCF_EM_REL_OR; } | |
87 | ; | |
88 | ||
89 | invert: | |
90 | /* empty */ | |
91 | { $$ = 0; } | |
92 | | NOT | |
93 | { $$ = 1; } | |
94 | ; | |
95 | %% | |
96 | ||
5761f04f | 97 | void yyerror(const char *s) |
311b4145 SH |
98 | { |
99 | ematch_err = strdup(s); | |
100 | } | |
101 |