shemminger | 311b414 | 2005-06-23 20:25:16 +0000 | [diff] [blame] | 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 |
| 10 | %pure_parser |
| 11 | %token-table |
| 12 | %error-verbose |
| 13 | %name-prefix="ematch_" |
| 14 | |
| 15 | %union { |
| 16 | unsigned int i; |
| 17 | struct bstr *b; |
| 18 | struct ematch *e; |
| 19 | } |
| 20 | |
| 21 | %{ |
| 22 | extern int yylex(YYSTYPE *, YYLTYPE *); |
| 23 | extern void yyerror(char *s); |
| 24 | extern struct ematch *ematch_root; |
| 25 | extern char *ematch_err; |
| 26 | %} |
| 27 | |
| 28 | %token <i> ERROR |
| 29 | %token <b> ATTRIBUTE |
| 30 | %token <i> AND OR NOT |
| 31 | %type <i> invert relation |
| 32 | %type <e> match expr |
| 33 | %type <b> args |
| 34 | %right AND OR |
| 35 | %start input |
| 36 | %% |
| 37 | input: |
| 38 | /* empty */ |
| 39 | | expr |
| 40 | { ematch_root = $1; } |
| 41 | | expr error |
| 42 | { |
| 43 | ematch_root = $1; |
| 44 | YYACCEPT; |
| 45 | } |
| 46 | ; |
| 47 | |
| 48 | expr: |
| 49 | match |
| 50 | { $$ = $1; } |
| 51 | | match relation expr |
| 52 | { |
| 53 | $1->relation = $2; |
| 54 | $1->next = $3; |
| 55 | $$ = $1; |
| 56 | } |
| 57 | ; |
| 58 | |
| 59 | match: |
| 60 | invert ATTRIBUTE '(' args ')' |
| 61 | { |
| 62 | $2->next = $4; |
| 63 | $$ = new_ematch($2, $1); |
| 64 | if ($$ == NULL) |
| 65 | YYABORT; |
| 66 | } |
| 67 | | invert '(' expr ')' |
| 68 | { |
| 69 | $$ = new_ematch(NULL, $1); |
| 70 | if ($$ == NULL) |
| 71 | YYABORT; |
| 72 | $$->child = $3; |
| 73 | } |
| 74 | ; |
| 75 | |
| 76 | args: |
| 77 | ATTRIBUTE |
| 78 | { $$ = $1; } |
| 79 | | ATTRIBUTE args |
| 80 | { $1->next = $2; } |
| 81 | ; |
| 82 | |
| 83 | relation: |
| 84 | AND |
| 85 | { $$ = TCF_EM_REL_AND; } |
| 86 | | OR |
| 87 | { $$ = TCF_EM_REL_OR; } |
| 88 | ; |
| 89 | |
| 90 | invert: |
| 91 | /* empty */ |
| 92 | { $$ = 0; } |
| 93 | | NOT |
| 94 | { $$ = 1; } |
| 95 | ; |
| 96 | %% |
| 97 | |
| 98 | void yyerror(char *s) |
| 99 | { |
| 100 | ematch_err = strdup(s); |
| 101 | } |
| 102 | |