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%{
/*
* Copyright (C) 2009 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "expr.h"
#include "yydefs.h"
#include "parser.h"
int gLine = 1;
int gColumn = 1;
int gPos = 0;
// TODO: enforce MAX_STRING_LEN during lexing
char string_buffer[MAX_STRING_LEN];
char* string_pos;
#define ADVANCE do {yylloc.start=gPos; yylloc.end=gPos+yyleng; \
gColumn+=yyleng; gPos+=yyleng;} while(0)
%}
%x STR
%option noyywrap
%%
\" {
BEGIN(STR);
string_pos = string_buffer;
yylloc.start = gPos;
++gColumn;
++gPos;
}
<STR>{
\" {
++gColumn;
++gPos;
BEGIN(INITIAL);
*string_pos = '\0';
yylval.str = strdup(string_buffer);
yylloc.end = gPos;
return STRING;
}
\\n { gColumn += yyleng; gPos += yyleng; *string_pos++ = '\n'; }
\\t { gColumn += yyleng; gPos += yyleng; *string_pos++ = '\t'; }
\\\" { gColumn += yyleng; gPos += yyleng; *string_pos++ = '\"'; }
\\\\ { gColumn += yyleng; gPos += yyleng; *string_pos++ = '\\'; }
\\x[0-9a-fA-F]{2} {
gColumn += yyleng;
gPos += yyleng;
int val;
sscanf(yytext+2, "%x", &val);
*string_pos++ = val;
}
\n {
++gLine;
++gPos;
gColumn = 1;
*string_pos++ = yytext[0];
}
. {
++gColumn;
++gPos;
*string_pos++ = yytext[0];
}
}
if ADVANCE; return IF;
then ADVANCE; return THEN;
else ADVANCE; return ELSE;
endif ADVANCE; return ENDIF;
[a-zA-Z0-9_:/.]+ {
ADVANCE;
yylval.str = strdup(yytext);
return STRING;
}
\&\& ADVANCE; return AND;
\|\| ADVANCE; return OR;
== ADVANCE; return EQ;
!= ADVANCE; return NE;
[+(),!;] ADVANCE; return yytext[0];
[ \t]+ ADVANCE;
(#.*)?\n gPos += yyleng; ++gLine; gColumn = 1;
. return BAD;
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