lex.l

   1 /*
   2  * Copyright (c) 2016 Mohamed Aslan <maslan@sce.carleton.ca>
   3  *
   4  * Permission to use, copy, modify, and distribute this software for any
   5  * purpose with or without fee is hereby granted, provided that the above
   6  * copyright notice and this permission notice appear in all copies.
   7  *
   8  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
   9  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  10  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  11  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  12  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  13  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  14  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  15  */
  16
  17 %{
  18 #include <stdio.h>
  19 #include "y.tab.h"
  20
  21 extern int yyerror(const char *fmt, ...);
  22 %}
  23
  24 %option yylineno
  25 %option noyywrap
  26 %option noinput
  27 %option nounput
  28
  29 %x dquotes
  30
  31 %%
  32
  33 id                              { return ID; }
  34 listen                          { return LISTEN; }
  35 on                              { return ON; }
  36 controller                      { return CONTROLLER; }
  37 ip                              { return IP; }
  38 port                            { return PORT; }
  39 replicas                        { return REPLICAS; }
  40 openflow                        { return OPENFLOW; }
  41 version                         { return VERSION; }
  42 application                     { return APPLICATION; }
  43 adapt                           { return ADAPT; }
  44 every                           { return EVERY; }
  45 learn                           { return LEARN; }
  46 for                             { return FOR; }
  47 sec                             { return SEC; }
  48 min                             { return MIN; }
  49 log                             { return LOG; }
  50 to                              { return TO; }
  51 topology                        { return TOPOLOGY; }
  52 host                            { return HOST; }
  53 at                              { return AT; }
  54 dpid                            { return DPID; }
  55
  56 yes                             { yylval.i = 1; return BOOL; }
  57 no                              { yylval.i = 0; return BOOL; }
  58
  59 ,                               { return COMMA; }
  60
  61 \{                              { return LCBRACKET;}
  62 \}                              { return RCBRACKET;}
  63
  64 [0-9]+                          { yylval.i = atoi(yytext); return NUMBER; }
  65 0x[0-9a-fA-F]+                  { return NUMBER; }
  66
  67 \"                              { BEGIN(dquotes); }
  68 <dquotes>[^\"]*\"               {
  69                                         yylval.s = strndup(yytext, yyleng - 1);
  70                                         BEGIN(INITIAL);
  71                                         return STRING;
  72                                 }
  73
  74 [\_a-zA-Z][\_a-zA-Z0-9]*        { yylval.s = strdup(yytext); return VAR; }
  75
  76 [ \t\n]                         { ; }
  77 \#.*\n                          { ; }
  78 .                               { yyerror("error: invalid character: %s", yytext); }
  79
  80 %%