glcpp-lex.l

   1 %{
   2 /*
   3  * Copyright © 2010 Intel Corporation
   4  *
   5  * Permission is hereby granted, free of charge, to any person obtaining a
   6  * copy of this software and associated documentation files (the "Software"),
   7  * to deal in the Software without restriction, including without limitation
   8  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   9  * and/or sell copies of the Software, and to permit persons to whom the
  10  * Software is furnished to do so, subject to the following conditions:
  11  *
  12  * The above copyright notice and this permission notice (including the next
  13  * paragraph) shall be included in all copies or substantial portions of the
  14  * Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  19  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  21  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  22  * DEALINGS IN THE SOFTWARE.
  23  */
  24
  25 #include <stdio.h>
  26 #include <string.h>
  27
  28 #include "glcpp.h"
  29 #include "glcpp-parse.h"
  30 %}
  31
  32 %option reentrant noyywrap
  33 %option extra-type="glcpp_parser_t *"
  34
  35 %x ST_DEFINE
  36 %x ST_UNDEF
  37
  38 SPACE           [[:space:]]
  39 NONSPACE        [^[:space:]]
  40 NEWLINE         [\n]
  41 HSPACE          [ \t]
  42 HASH            ^{HSPACE}*#
  43 IDENTIFIER      [_a-zA-Z][_a-zA-Z0-9]*
  44 TOKEN           {NONSPACE}+
  45
  46 %%
  47
  48 {HASH}define{HSPACE}*   {
  49         BEGIN ST_DEFINE;
  50         return DEFINE;
  51 }
  52
  53 <ST_DEFINE>{IDENTIFIER} {
  54         yylval.str = xtalloc_strdup (yyextra, yytext);
  55         return IDENTIFIER;
  56 }
  57
  58 <ST_DEFINE>{TOKEN} {
  59         yylval.str = xtalloc_strdup (yyextra, yytext);
  60         return TOKEN;
  61 }
  62
  63 <ST_DEFINE>\n {
  64         BEGIN INITIAL;
  65         return NEWLINE;
  66 }
  67
  68 <ST_DEFINE>{SPACE}+
  69
  70 {HASH}undef{HSPACE}*    {
  71         BEGIN ST_UNDEF;
  72         return UNDEF;
  73 }
  74
  75 <ST_UNDEF>{IDENTIFIER}  {
  76         yylval.str = xtalloc_strdup (yyextra, yytext);
  77         return IDENTIFIER;
  78 }
  79
  80 <ST_UNDEF>\n {
  81         BEGIN INITIAL;
  82         return NEWLINE;
  83 }
  84
  85 <ST_UNDEF>{SPACE}+
  86
  87         /* Anything we don't specifically recognize is a stream of tokens */
  88 {NONSPACE}+ {
  89         yylval.str = xtalloc_strdup (yyextra, yytext);
  90         return TOKEN;
  91 }
  92
  93 %%