src/plugins/ctf/common/metadata/lexer.lpp

   1 %{
   2 /*
   3  * SPDX-License-Identifier: MIT
   4  *
   5  * Copyright 2010 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
   6  *
   7  * Common Trace Formal Lexer
   8  */
   9
  10 #include <ctype.h>
  11 #include <stdio.h>
  12
  13 #define BT_LOG_OUTPUT_LEVEL ctf_plugin_metadata_log_level
  14 #define BT_LOG_TAG "PLUGIN-CTF-METADATA-LEXER"
  15 #include "plugins/ctf/common/metadata/logging.hpp"
  16
  17 #include "plugins/ctf/common/metadata/ast.hpp"
  18 #include "plugins/ctf/common/metadata/parser-wrap.hpp"
  19 #include "plugins/ctf/common/metadata/scanner.hpp"
  20
  21 #define YY_FATAL_ERROR(_msg)    BT_LOGF_STR(_msg)
  22
  23 #define PARSE_INTEGER_LITERAL(base)                                     \
  24         do {                                                            \
  25                 errno = 0;                                              \
  26                 yylval->ull = strtoull(yytext, NULL, base);             \
  27                 if (errno) {                                            \
  28                         _BT_LOGE_APPEND_CAUSE_LINENO(yylineno,                  \
  29                                 "Cannot parser constant integer: "      \
  30                                 "base=%d, text=\"%s\"", base, yytext);  \
  31                         return CTF_ERROR;                               \
  32                 }                                                       \
  33         } while (0)
  34 %}
  35
  36 %x comment_ml comment_sl string_lit char_const
  37 %option reentrant yylineno noyywrap bison-bridge
  38 %option extra-type="struct ctf_scanner *"
  39         /* bison-locations */
  40 INTEGER_SUFFIX                  (U|UL|ULL|LU|LLU|Ul|Ull|lU|llU|u|uL|uLL|Lu|LLu|ul|ull|lu|llu)
  41 DIGIT                           [0-9]
  42 NONDIGIT                        [a-zA-Z_]
  43 HEXDIGIT                        [0-9A-Fa-f]
  44 OCTALDIGIT                      [0-7]
  45 UCHARLOWERCASE                  \\u{HEXDIGIT}{4}
  46 UCHARUPPERCASE                  \\U{HEXDIGIT}{8}
  47 ID_NONDIGIT                     {NONDIGIT}|{UCHARLOWERCASE}|{UCHARUPPERCASE}
  48 IDENTIFIER                      {ID_NONDIGIT}({ID_NONDIGIT}|{DIGIT})*
  49 %%
  50
  51                                 /*
  52                                  * Using start conditions to deal with comments
  53                                  * and strings.
  54                                  */
  55
  56 "/*"                            BEGIN(comment_ml);
  57 <comment_ml>[^*\n]*             /* eat anything that's not a '*' */
  58 <comment_ml>"*"+[^*/\n]*        /* eat up '*'s not followed by '/'s */
  59 <comment_ml>\n
  60 <comment_ml>"*"+"/"             BEGIN(INITIAL);
  61
  62 "//"[^\n]*\n                    /* skip comment */
  63
  64 L?\"(\\.|[^\\"])*\"             { if (import_string(yyextra, yylval, yytext, '\"') < 0) return CTF_ERROR; else return CTF_STRING_LITERAL; }
  65 L?\'(\\.|[^\\'])*\'             { if (import_string(yyextra, yylval, yytext, '\'') < 0) return CTF_ERROR; else return CTF_CHARACTER_LITERAL; }
  66
  67 "["                             return CTF_LSBRAC;
  68 "]"                             return CTF_RSBRAC;
  69 "("                             return CTF_LPAREN;
  70 ")"                             return CTF_RPAREN;
  71 "{"                             return CTF_LBRAC;
  72 "}"                             return CTF_RBRAC;
  73 "->"                            return CTF_RARROW;
  74 "*"                             return CTF_STAR;
  75 "+"                             return CTF_PLUS;
  76 "-"                             return CTF_MINUS;
  77 "<"                             return CTF_LT;
  78 ">"                             return CTF_GT;
  79 :=                              return CTF_TYPEASSIGN;
  80 :                               return CTF_COLON;
  81 ;                               return CTF_SEMICOLON;
  82 "..."                           return CTF_DOTDOTDOT;
  83 "."                             return CTF_DOT;
  84 =                               return CTF_EQUAL;
  85 ","                             return CTF_COMMA;
  86 align                           setstring(yyextra, yylval, yytext); return CTF_TOK_ALIGN;
  87 const                           setstring(yyextra, yylval, yytext); return CTF_CONST;
  88 char                            setstring(yyextra, yylval, yytext); return CTF_CHAR;
  89 clock                           setstring(yyextra, yylval, yytext); return CTF_CLOCK;
  90 double                          setstring(yyextra, yylval, yytext); return CTF_DOUBLE;
  91 enum                            setstring(yyextra, yylval, yytext); return CTF_ENUM;
  92 env                             setstring(yyextra, yylval, yytext); return CTF_ENV;
  93 event                           setstring(yyextra, yylval, yytext); return CTF_EVENT;
  94 floating_point                  setstring(yyextra, yylval, yytext); return CTF_FLOATING_POINT;
  95 float                           setstring(yyextra, yylval, yytext); return CTF_FLOAT;
  96 integer                         setstring(yyextra, yylval, yytext); return CTF_INTEGER;
  97 int                             setstring(yyextra, yylval, yytext); return CTF_INT;
  98 long                            setstring(yyextra, yylval, yytext); return CTF_LONG;
  99 short                           setstring(yyextra, yylval, yytext); return CTF_SHORT;
 100 signed                          setstring(yyextra, yylval, yytext); return CTF_SIGNED;
 101 stream                          setstring(yyextra, yylval, yytext); return CTF_STREAM;
 102 string                          setstring(yyextra, yylval, yytext); return CTF_STRING;
 103 struct                          setstring(yyextra, yylval, yytext); return CTF_STRUCT;
 104 trace                           setstring(yyextra, yylval, yytext); return CTF_TRACE;
 105 callsite                        setstring(yyextra, yylval, yytext); return CTF_CALLSITE;
 106 typealias                       setstring(yyextra, yylval, yytext); return CTF_TYPEALIAS;
 107 typedef                         setstring(yyextra, yylval, yytext); return CTF_TYPEDEF;
 108 unsigned                        setstring(yyextra, yylval, yytext); return CTF_UNSIGNED;
 109 variant                         setstring(yyextra, yylval, yytext); return CTF_VARIANT;
 110 void                            setstring(yyextra, yylval, yytext); return CTF_VOID;
 111 _Bool                           setstring(yyextra, yylval, yytext); return CTF_BOOL;
 112 _Complex                        setstring(yyextra, yylval, yytext); return CTF_COMPLEX;
 113 _Imaginary                      setstring(yyextra, yylval, yytext); return CTF_IMAGINARY;
 114 [1-9]{DIGIT}*{INTEGER_SUFFIX}?  PARSE_INTEGER_LITERAL(10); return CTF_INTEGER_LITERAL;
 115 0{OCTALDIGIT}*{INTEGER_SUFFIX}? PARSE_INTEGER_LITERAL(8); return CTF_INTEGER_LITERAL;
 116 0[xX]{HEXDIGIT}+{INTEGER_SUFFIX}?       PARSE_INTEGER_LITERAL(16); return CTF_INTEGER_LITERAL;
 117
 118 {IDENTIFIER}                    BT_LOGT("Got identifier: id=\"%s\"", yytext); setstring(yyextra, yylval, yytext); if (is_type(yyextra, yytext)) return ID_TYPE; else return IDENTIFIER;
 119 [ \t\r\n]                       ; /* ignore */
 120 .                               _BT_LOGE_APPEND_CAUSE_LINENO(yylineno, "Invalid character: char=\"%c\", val=0x%02x", isprint((unsigned char) yytext[0]) ? yytext[0] : '\0', yytext[0]); return CTF_ERROR;
 121 %%