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953192ba MD |
1 | %{ |
2 | /* | |
3 | * filter-lexer.l | |
4 | * | |
5 | * LTTng filter lexer | |
6 | * | |
ab5be9fa | 7 | * Copyright 2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
953192ba | 8 | * |
ab5be9fa | 9 | * SPDX-License-Identifier: LGPL-2.1-only |
953192ba | 10 | * |
953192ba MD |
11 | */ |
12 | ||
13 | #include <stdio.h> | |
14 | #include "filter-ast.h" | |
15 | #include "filter-parser.h" | |
16 | ||
17 | extern | |
18 | void setstring(struct filter_parser_ctx *parser_ctx, YYSTYPE *lvalp, const char *src); | |
19 | ||
20 | static void yyunput (int c, register char * yy_bp , yyscan_t yyscanner) | |
21 | __attribute__((unused)); | |
22 | static int input (yyscan_t yyscanner) __attribute__((unused)); | |
23 | ||
24 | %} | |
25 | ||
26 | %x comment_ml comment_sl string_lit char_const | |
27 | %option reentrant yylineno noyywrap bison-bridge | |
28 | %option extra-type="struct filter_parser_ctx *" | |
29 | /* bison-locations */ | |
e90d8561 MD |
30 | |
31 | D [0-9] | |
32 | L [a-zA-Z_] | |
33 | H [a-fA-F0-9] | |
34 | E ([Ee][+-]?{D}+) | |
35 | P ([Pp][+-]?{D}+) | |
36 | FS (f|F|l|L) | |
37 | IS ((u|U)|(u|U)?(l|L|ll|LL)|(l|L|ll|LL)(u|U)) | |
38 | ||
953192ba MD |
39 | INTEGER_SUFFIX [ \n\t]*(U|UL|ULL|LU|LLU|Ul|Ull|lU|llU|u|uL|uLL|Lu|LLu|ul|ull|lu|llu) |
40 | DIGIT [0-9] | |
41 | NONDIGIT [a-zA-Z_] | |
42 | HEXDIGIT [0-9A-Fa-f] | |
43 | OCTALDIGIT [0-7] | |
44 | UCHARLOWERCASE \\u{HEXDIGIT}{4} | |
45 | UCHARUPPERCASE \\U{HEXDIGIT}{8} | |
bff988fa | 46 | ID_EXTRA_CHAR (":") |
a1f68b22 | 47 | ID_NONDIGIT {NONDIGIT}|{UCHARLOWERCASE}|{UCHARUPPERCASE}|{ID_EXTRA_CHAR} |
953192ba MD |
48 | IDENTIFIER {ID_NONDIGIT}({ID_NONDIGIT}|{DIGIT})* |
49 | ESCSEQ \\(\'|\"|\?|\\|a|b|f|n|r|t|v|{OCTALDIGIT}{1,3}|u{HEXDIGIT}{4}|U{HEXDIGIT}{8}|x{HEXDIGIT}+) | |
50 | %% | |
51 | ||
52 | /* | |
53 | * Using start conditions to deal with comments | |
54 | * and strings. | |
55 | */ | |
56 | ||
57 | "/*" BEGIN(comment_ml); | |
58 | <comment_ml>[^*\n]* /* eat anything that's not a '*' */ | |
59 | <comment_ml>"*"+[^*/\n]* /* eat up '*'s not followed by '/'s */ | |
60 | <comment_ml>\n ++yylineno; | |
61 | <comment_ml>"*"+"/" BEGIN(INITIAL); | |
62 | ||
63 | "//" BEGIN(comment_sl); | |
64 | <comment_sl>[^\n]*\n ++yylineno; BEGIN(INITIAL); | |
65 | ||
66 | L\' BEGIN(char_const); return CHARACTER_CONSTANT_START; | |
67 | \' BEGIN(char_const); return CHARACTER_CONSTANT_START; | |
68 | <char_const>\' BEGIN(INITIAL); return SQUOTE; | |
69 | ||
70 | L\" BEGIN(string_lit); return STRING_LITERAL_START; | |
71 | \" BEGIN(string_lit); return STRING_LITERAL_START; | |
72 | <string_lit>\" BEGIN(INITIAL); return DQUOTE; | |
73 | ||
74 | <char_const,string_lit>ESCSEQ return ESCSEQ; | |
75 | <char_const,string_lit>\n ; /* ignore */ | |
76 | <char_const,string_lit>. setstring(yyextra, yylval, yytext); return CHAR_STRING_TOKEN; | |
77 | ||
e90d8561 MD |
78 | |
79 | 0[xX]{H}+{IS}? setstring(yyextra, yylval, yytext); return HEXADECIMAL_CONSTANT; | |
80 | 0[0-7]*{IS}? setstring(yyextra, yylval, yytext); return OCTAL_CONSTANT; | |
81 | [1-9]{D}*{IS}? setstring(yyextra, yylval, yytext); return DECIMAL_CONSTANT; | |
82 | ||
83 | {D}+{E}{FS}? setstring(yyextra, yylval, yytext); return FLOAT_CONSTANT; | |
84 | {D}*"."{D}+{E}?{FS}? setstring(yyextra, yylval, yytext); return FLOAT_CONSTANT; | |
85 | {D}+"."{D}*{E}?{FS}? setstring(yyextra, yylval, yytext); return FLOAT_CONSTANT; | |
86 | 0[xX]{H}+{P}{FS}? setstring(yyextra, yylval, yytext); return FLOAT_CONSTANT; | |
87 | 0[xX]{H}*"."{H}+{P}?{FS}? setstring(yyextra, yylval, yytext); return FLOAT_CONSTANT; | |
88 | 0[xX]{H}+"."{H}*{P}?{FS}? setstring(yyextra, yylval, yytext); return FLOAT_CONSTANT; | |
89 | ||
953192ba MD |
90 | "[" return LSBRAC; |
91 | "]" return RSBRAC; | |
92 | "(" return LPAREN; | |
93 | ")" return RPAREN; | |
94 | "{" return LBRAC; | |
95 | "}" return RBRAC; | |
96 | "->" return RARROW; | |
97 | ||
98 | "*" return STAR; | |
99 | "+" return PLUS; | |
100 | "-" return MINUS; | |
101 | ||
102 | "%" return MOD_OP; | |
103 | "/" return DIV_OP; | |
104 | ">>" return RIGHT_OP; | |
105 | "<<" return LEFT_OP; | |
106 | ||
107 | "==" return EQ_OP; | |
108 | "!=" return NE_OP; | |
109 | "<=" return LE_OP; | |
110 | ">=" return GE_OP; | |
111 | "<" return LT_OP; | |
112 | ">" return GT_OP; | |
113 | "&&" return AND_OP; | |
114 | "||" return OR_OP; | |
115 | "!" return NOT_OP; | |
116 | ||
117 | ":=" return ASSIGN; | |
118 | ":" return COLON; | |
119 | ";" return SEMICOLON; | |
120 | "..." return DOTDOTDOT; | |
121 | "." return DOT; | |
122 | "=" return EQUAL; | |
123 | "," return COMMA; | |
124 | "^" return XOR_BIN; | |
125 | "&" return AND_BIN; | |
126 | "|" return OR_BIN; | |
127 | "~" return NOT_BIN; | |
586dc72f | 128 | "$"{IDENTIFIER} printf_debug("<GLOBAL_IDENTIFIER %s>\n", yytext); setstring(yyextra, yylval, yytext); return GLOBAL_IDENTIFIER; |
953192ba MD |
129 | {IDENTIFIER} printf_debug("<IDENTIFIER %s>\n", yytext); setstring(yyextra, yylval, yytext); return IDENTIFIER; |
130 | [ \t\n]+ ; /* ignore */ | |
131 | . return ERROR; | |
132 | %% |