tools/miniswig/lexer.ll

   1 %{
   2 #include <math.h>
   3 #include <stdlib.h>
   4 #include <string.h>
   5 #include <iostream>
   6 #include "tree.hpp"
   7 #include "parser.hpp"
   8 #include "globals.hpp"
   9
  10 #define YY_DECL int yylex(YYSTYPE* yylval)
  11
  12 #define YY_INPUT(buf, result, max_size)                     \
  13 {                                                           \
  14     input->read(buf, max_size);                             \
  15     result = input->gcount();                               \
  16 }
  17
  18 std::string last_docucomment;
  19 std::string original_file;
  20 std::string current_file;
  21 std::string comm;
  22 int offset_lnum;
  23
  24 int getCurrentLine()
  25 {
  26     return yylineno - offset_lnum;
  27 }
  28
  29 %}
  30
  31 %option noyywrap
  32 %option yylineno
  33 /* %option never-interactive */
  34
  35 %x comment
  36 %%
  37
  38 #[ \t]+[0-9]+[ \t]+.*                         {
  39     int lnum;
  40     char file[1024];
  41     if(sscanf(yytext, "# %d \"%1023[^\"]\"", &lnum, file) == 2) {
  42         offset_lnum = yylineno - lnum + 1;
  43         current_file = file;
  44         if(original_file == "")
  45             original_file = file;
  46     } else {
  47         std::cerr << "Warning: Parse error in processor info directive.\n";
  48     }
  49 }
  50 #.*                                     /* ignore preprocessor directives */
  51 [[:space:]]+                            /* eat spaces */
  52 "/*"                                    { BEGIN(comment); comm = ""; }
  53 <comment>[^*\n]*                        { comm += yytext; }
  54 <comment>"*"+[^*/]*                     { comm += yytext; }
  55 <comment>"*/"                    {
  56     BEGIN(INITIAL);
  57     if(comm[0] == '*') { // It's a docu comment...
  58         last_docucomment = "";
  59         bool linestart = true;
  60         for(size_t i = 1; i < comm.size(); ++i) {
  61             if(linestart && (comm[i] == '*' || isspace(comm[i]))) {
  62                 continue;
  63             } else if(comm[i] == '\n') {
  64                 linestart = true;
  65             } else {
  66                 linestart = false;
  67             }
  68             last_docucomment += comm[i];
  69         }
  70     }
  71 }
  72 \/\/[^\n]*\n                            {
  73     if(yytext[2] == '/') { // it's a docu comment...
  74         last_docucomment = std::string(yytext+3, strlen(yytext)-4);
  75     }
  76 }
  77 class                                   { return T_CLASS; }
  78 struct                                  { return T_STRUCT; }
  79 static                                  { return T_STATIC; }
  80 virtual                                 { return T_VIRTUAL; }
  81 const                                   { return T_CONST; }
  82 unsigned                                { return T_UNSIGNED; }
  83 signed                                  { return T_SIGNED; }
  84 void                                    { return T_VOID; }
  85 bool                                    { return T_BOOL; }
  86 char                                    { return T_CHAR; }
  87 short                                   { return T_SHORT; }
  88 int                                     { return T_INT; }
  89 long                                    { return T_LONG; }
  90 float                                   { return T_FLOAT; }
  91 double                                  { return T_DOUBLE; }
  92 public                                  { return T_PUBLIC; }
  93 protected                               { return T_PROTECTED; }
  94 private                                 { return T_PRIVATE; }
  95 namespace                               { return T_NAMESPACE; }
  96 [a-zA-Z_][a-zA-Z_0-9]*                  {
  97         Namespace* ns = search_namespace;
  98         if(ns == 0)
  99             ns = current_namespace;
 100         // is it a type?
 101         yylval->atomic_type = ns->_findType(yytext, search_down);
 102         if(yylval->atomic_type)
 103             return T_ATOMIC_TYPE;
 104         // or a namespace? (hack for now...)
 105         yylval->_namespace = ns->_findNamespace(yytext, search_down);
 106         if(yylval->_namespace) {
 107             return T_NAMESPACEREF;
 108         }
 109         // a new ID
 110         yylval->str = strdup(yytext);
 111         return T_ID;
 112 }
 113 \:\:                                    { return T_DDCOL; }
 114 [0-9]+                                  {
 115                                             yylval->ival = atoi(yytext);
 116                                             return T_INT;
 117                                         }
 118 [0-9]*\.[0-9]+(e[0-9]+)?                {
 119                                             yylval->fval = atof(yytext);
 120                                             return T_FLOAT;
 121                                         }
 122 \".*\"                                  {
 123                                             yylval->str = strdup(yytext);
 124                                             return T_STRING;
 125                                         }
 126 .                                       { return yytext[0]; }
 127
 128 %%
 129