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      1 %{
      2 /*
      3  * Copyright (C) 2009 The Android Open Source Project
      4  *
      5  * Licensed under the Apache License, Version 2.0 (the "License");
      6  * you may not use this file except in compliance with the License.
      7  * You may obtain a copy of the License at
      8  *
      9  *      http://www.apache.org/licenses/LICENSE-2.0
     10  *
     11  * Unless required by applicable law or agreed to in writing, software
     12  * distributed under the License is distributed on an "AS IS" BASIS,
     13  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     14  * See the License for the specific language governing permissions and
     15  * limitations under the License.
     16  */
     17 
     18 #include <string.h>
     19 #include <string>
     20 
     21 #include "edify/expr.h"
     22 #include "yydefs.h"
     23 #include "parser.h"
     24 
     25 int gLine = 1;
     26 int gColumn = 1;
     27 int gPos = 0;
     28 
     29 std::string string_buffer;
     30 
     31 #define ADVANCE do {yylloc.start=gPos; yylloc.end=gPos+yyleng; \
     32                     gColumn+=yyleng; gPos+=yyleng;} while(0)
     33 
     34 %}
     35 
     36 %x STR
     37 
     38 %option noinput
     39 %option nounput
     40 %option noyywrap
     41 
     42 %%
     43 
     44 
     45 \" {
     46     BEGIN(STR);
     47     string_buffer.clear();
     48     yylloc.start = gPos;
     49     ++gColumn;
     50     ++gPos;
     51 }
     52 
     53 <STR>{
     54   \" {
     55       ++gColumn;
     56       ++gPos;
     57       BEGIN(INITIAL);
     58       yylval.str = strdup(string_buffer.c_str());
     59       yylloc.end = gPos;
     60       return STRING;
     61   }
     62 
     63   \\n   { gColumn += yyleng; gPos += yyleng; string_buffer.push_back('\n'); }
     64   \\t   { gColumn += yyleng; gPos += yyleng; string_buffer.push_back('\t'); }
     65   \\\"  { gColumn += yyleng; gPos += yyleng; string_buffer.push_back('\"'); }
     66   \\\\  { gColumn += yyleng; gPos += yyleng; string_buffer.push_back('\\'); }
     67 
     68   \\x[0-9a-fA-F]{2} {
     69       gColumn += yyleng;
     70       gPos += yyleng;
     71       int val;
     72       sscanf(yytext+2, "%x", &val);
     73       string_buffer.push_back(static_cast<char>(val));
     74   }
     75 
     76   \n {
     77       ++gLine;
     78       ++gPos;
     79       gColumn = 1;
     80       string_buffer.push_back(yytext[0]);
     81   }
     82 
     83   . {
     84       ++gColumn;
     85       ++gPos;
     86       string_buffer.push_back(yytext[0]);
     87   }
     88 }
     89 
     90 if                ADVANCE; return IF;
     91 then              ADVANCE; return THEN;
     92 else              ADVANCE; return ELSE;
     93 endif             ADVANCE; return ENDIF;
     94 
     95 [a-zA-Z0-9_:/.]+ {
     96   ADVANCE;
     97   yylval.str = strdup(yytext);
     98   return STRING;
     99 }
    100 
    101 \&\&              ADVANCE; return AND;
    102 \|\|              ADVANCE; return OR;
    103 ==                ADVANCE; return EQ;
    104 !=                ADVANCE; return NE;
    105 
    106 [+(),!;]          ADVANCE; return yytext[0];
    107 
    108 [ \t]+            ADVANCE;
    109 
    110 (#.*)?\n          gPos += yyleng; ++gLine; gColumn = 1;
    111 
    112 .                 return BAD;
    113