| The Android Open Source Project | dd7bc33 | 2009-03-03 19:32:55 -0800 | [diff] [blame] | 1 | %{ |
| 2 | /* $NetBSD: arith_lex.l,v 1.12.6.1 2005/04/07 11:38:58 tron Exp $ */ |
| 3 | |
| 4 | /*- |
| 5 | * Copyright (c) 1993 |
| 6 | * The Regents of the University of California. All rights reserved. |
| 7 | * |
| 8 | * This code is derived from software contributed to Berkeley by |
| 9 | * Kenneth Almquist. |
| 10 | * |
| 11 | * Redistribution and use in source and binary forms, with or without |
| 12 | * modification, are permitted provided that the following conditions |
| 13 | * are met: |
| 14 | * 1. Redistributions of source code must retain the above copyright |
| 15 | * notice, this list of conditions and the following disclaimer. |
| 16 | * 2. Redistributions in binary form must reproduce the above copyright |
| 17 | * notice, this list of conditions and the following disclaimer in the |
| 18 | * documentation and/or other materials provided with the distribution. |
| 19 | * 3. Neither the name of the University nor the names of its contributors |
| 20 | * may be used to endorse or promote products derived from this software |
| 21 | * without specific prior written permission. |
| 22 | * |
| 23 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
| 24 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 25 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 26 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| 27 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 28 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 29 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 30 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 31 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 32 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 33 | * SUCH DAMAGE. |
| 34 | */ |
| 35 | |
| 36 | #include <sys/cdefs.h> |
| 37 | #ifndef lint |
| 38 | #if 0 |
| 39 | static char sccsid[] = "@(#)arith_lex.l 8.3 (Berkeley) 5/4/95"; |
| 40 | #else |
| 41 | __RCSID("$NetBSD: arith_lex.l,v 1.12.6.1 2005/04/07 11:38:58 tron Exp $"); |
| 42 | #endif |
| 43 | #endif /* not lint */ |
| 44 | |
| 45 | #include <unistd.h> |
| 46 | #include "arith.h" |
| 47 | #include "error.h" |
| 48 | #include "expand.h" |
| 49 | #include "var.h" |
| 50 | |
| 51 | extern int yylval; |
| 52 | extern char *arith_buf, *arith_startbuf; |
| 53 | #undef YY_INPUT |
| 54 | #define YY_INPUT(buf,result,max) \ |
| 55 | result = (*buf = *arith_buf++) ? 1 : YY_NULL; |
| 56 | #define YY_NO_UNPUT |
| 57 | %} |
| 58 | %option noyywrap |
| 59 | |
| 60 | %% |
| 61 | [ \t\n] { ; } |
| 62 | 0x[0-9a-fA-F]+ { yylval = strtol(yytext, 0, 0); return(ARITH_NUM); } |
| 63 | 0[0-7]* { yylval = strtol(yytext, 0, 0); return(ARITH_NUM); } |
| 64 | [1-9][0-9]* { yylval = strtol(yytext, 0, 0); return(ARITH_NUM); } |
| 65 | [A-Za-z_][A-Za-z_0-9]* { char *v = lookupvar(yytext); |
| 66 | if (v) { |
| 67 | yylval = strtol(v, &v, 0); |
| 68 | if (*v == 0) |
| 69 | return ARITH_NUM; |
| 70 | } |
| 71 | error("arith: syntax error: \"%s\"", arith_startbuf); |
| 72 | } |
| 73 | "(" { return(ARITH_LPAREN); } |
| 74 | ")" { return(ARITH_RPAREN); } |
| 75 | "||" { return(ARITH_OR); } |
| 76 | "&&" { return(ARITH_AND); } |
| 77 | "|" { return(ARITH_BOR); } |
| 78 | "^" { return(ARITH_BXOR); } |
| 79 | "&" { return(ARITH_BAND); } |
| 80 | "==" { return(ARITH_EQ); } |
| 81 | "!=" { return(ARITH_NE); } |
| 82 | ">" { return(ARITH_GT); } |
| 83 | ">=" { return(ARITH_GE); } |
| 84 | "<" { return(ARITH_LT); } |
| 85 | "<=" { return(ARITH_LE); } |
| 86 | "<<" { return(ARITH_LSHIFT); } |
| 87 | ">>" { return(ARITH_RSHIFT); } |
| 88 | "*" { return(ARITH_MUL); } |
| 89 | "/" { return(ARITH_DIV); } |
| 90 | "%" { return(ARITH_REM); } |
| 91 | "+" { return(ARITH_ADD); } |
| 92 | "-" { return(ARITH_SUB); } |
| 93 | "~" { return(ARITH_BNOT); } |
| 94 | "!" { return(ARITH_NOT); } |
| 95 | . { error("arith: syntax error: \"%s\"", arith_startbuf); } |
| 96 | %% |
| 97 | |
| 98 | void |
| 99 | arith_lex_reset() { |
| 100 | #ifdef YY_NEW_FILE |
| 101 | YY_NEW_FILE; |
| 102 | #endif |
| 103 | } |