?? arith_lex.l
字號:
%{/* $NetBSD: arith_lex.l,v 1.12.6.1 2005/04/07 11:38:58 tron Exp $ *//*- * Copyright (c) 1993 * The Regents of the University of California. All rights reserved. * * This code is derived from software contributed to Berkeley by * Kenneth Almquist. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */#include <sys/cdefs.h>#ifndef lint#if 0static char sccsid[] = "@(#)arith_lex.l 8.3 (Berkeley) 5/4/95";#else__RCSID("$NetBSD: arith_lex.l,v 1.12.6.1 2005/04/07 11:38:58 tron Exp $");#endif#endif /* not lint */#include <unistd.h>#include "arith.h"#include "error.h"#include "expand.h"#include "var.h"extern int yylval;extern char *arith_buf, *arith_startbuf;#undef YY_INPUT#define YY_INPUT(buf,result,max) \ result = (*buf = *arith_buf++) ? 1 : YY_NULL;#define YY_NO_UNPUT%}%option noyywrap%%[ \t\n] { ; }0x[0-9a-fA-F]+ { yylval = strtol(yytext, 0, 0); return(ARITH_NUM); }0[0-7]* { yylval = strtol(yytext, 0, 0); return(ARITH_NUM); }[1-9][0-9]* { yylval = strtol(yytext, 0, 0); return(ARITH_NUM); }[A-Za-z_][A-Za-z_0-9]* { char *v = lookupvar(yytext); if (v) { yylval = strtol(v, &v, 0); if (*v == 0) return ARITH_NUM; } error("arith: syntax error: \"%s\"", arith_startbuf); }"(" { return(ARITH_LPAREN); }")" { return(ARITH_RPAREN); }"||" { return(ARITH_OR); }"&&" { return(ARITH_AND); }"|" { return(ARITH_BOR); }"^" { return(ARITH_BXOR); }"&" { return(ARITH_BAND); }"==" { return(ARITH_EQ); }"!=" { return(ARITH_NE); }">" { return(ARITH_GT); }">=" { return(ARITH_GE); }"<" { return(ARITH_LT); }"<=" { return(ARITH_LE); }"<<" { return(ARITH_LSHIFT); }">>" { return(ARITH_RSHIFT); }"*" { return(ARITH_MUL); }"/" { return(ARITH_DIV); }"%" { return(ARITH_REM); }"+" { return(ARITH_ADD); }"-" { return(ARITH_SUB); }"~" { return(ARITH_BNOT); }"!" { return(ARITH_NOT); }. { error("arith: syntax error: \"%s\"", arith_startbuf); }%%voidarith_lex_reset() {#ifdef YY_NEW_FILE YY_NEW_FILE;#endif}
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