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