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 "expr.h" 19 #include "yydefs.h" 20 #include "parser.h" 21 22 int gLine = 1; 23 int gColumn = 1; 24 int gPos = 0; 25 26 // TODO: enforce MAX_STRING_LEN during lexing 27 char string_buffer[MAX_STRING_LEN]; 28 char* string_pos; 29 30 #define ADVANCE do {yylloc.start=gPos; yylloc.end=gPos+yyleng; \ 31 gColumn+=yyleng; gPos+=yyleng;} while(0) 32 33 %} 34 35 %x STR 36 37 %option noyywrap 38 39 %% 40 41 42 \" { 43 BEGIN(STR); 44 string_pos = string_buffer; 45 yylloc.start = gPos; 46 ++gColumn; 47 ++gPos; 48 } 49 50 <STR>{ 51 \" { 52 ++gColumn; 53 ++gPos; 54 BEGIN(INITIAL); 55 *string_pos = '\0'; 56 yylval.str = strdup(string_buffer); 57 yylloc.end = gPos; 58 return STRING; 59 } 60 61 \\n { gColumn += yyleng; gPos += yyleng; *string_pos++ = '\n'; } 62 \\t { gColumn += yyleng; gPos += yyleng; *string_pos++ = '\t'; } 63 \\\" { gColumn += yyleng; gPos += yyleng; *string_pos++ = '\"'; } 64 \\\\ { gColumn += yyleng; gPos += yyleng; *string_pos++ = '\\'; } 65 66 \\x[0-9a-fA-F]{2} { 67 gColumn += yyleng; 68 gPos += yyleng; 69 int val; 70 sscanf(yytext+2, "%x", &val); 71 *string_pos++ = val; 72 } 73 74 \n { 75 ++gLine; 76 ++gPos; 77 gColumn = 1; 78 *string_pos++ = yytext[0]; 79 } 80 81 . { 82 ++gColumn; 83 ++gPos; 84 *string_pos++ = yytext[0]; 85 } 86 } 87 88 if ADVANCE; return IF; 89 then ADVANCE; return THEN; 90 else ADVANCE; return ELSE; 91 endif ADVANCE; return ENDIF; 92 93 [a-zA-Z0-9_:/.]+ { 94 ADVANCE; 95 yylval.str = strdup(yytext); 96 return STRING; 97 } 98 99 \&\& ADVANCE; return AND; 100 \|\| ADVANCE; return OR; 101 == ADVANCE; return EQ; 102 != ADVANCE; return NE; 103 104 [+(),!;] ADVANCE; return yytext[0]; 105 106 [ \t]+ ADVANCE; 107 108 (#.*)?\n gPos += yyleng; ++gLine; gColumn = 1; 109 110 . return BAD; 111