1 %{ 2 /* $NetBSD: arith_lex.l,v 1.16 2012/03/20 18:42:29 matt 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 1.16 2012/03/20 18:42:29 matt 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 intmax_t yylval; 52 extern const 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 %} 57 58 %option nounput noinput 59 60 %% 61 [ \t\n] { ; } 62 0x[0-9a-fA-F]+ { yylval = strtoimax(yytext, 0, 0); return(ARITH_NUM); } 63 0[0-7]* { yylval = strtoimax(yytext, 0, 0); return(ARITH_NUM); } 64 [1-9][0-9]* { yylval = strtoimax(yytext, 0, 0); return(ARITH_NUM); } 65 [A-Za-z_][A-Za-z_0-9]* { char *v = lookupvar(yytext); 66 if (v) { 67 yylval = strtoimax(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(void) { 100 #ifdef YY_NEW_FILE 101 YY_NEW_FILE; 102 #endif 103 } 104