src/lib/lttng-ctl/filter/filter-lexer.l

   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 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 */
  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
  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}
  46 ID_EXTRA_CHAR                   (":")
  47 ID_NONDIGIT                     {NONDIGIT}|{UCHARLOWERCASE}|{UCHARUPPERCASE}|{ID_EXTRA_CHAR}
  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
  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
  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;
 128 "$"{IDENTIFIER}                 printf_debug("<GLOBAL_IDENTIFIER %s>\n", yytext); setstring(yyextra, yylval, yytext); return GLOBAL_IDENTIFIER;
 129 {IDENTIFIER}                    printf_debug("<IDENTIFIER %s>\n", yytext); setstring(yyextra, yylval, yytext); return IDENTIFIER;
 130 [ \t\n]+                        ; /* ignore */
 131 .                               return ERROR;
 132 %%