155 lines
4.0 KiB
Plaintext
155 lines
4.0 KiB
Plaintext
%{
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/*-
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* Copyright (c) 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Kenneth Almquist.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#if 0
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#ifndef lint
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static char sccsid[] = "@(#)arith_lex.l 8.3 (Berkeley) 5/4/95";
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#endif
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#endif /* not lint */
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <string.h>
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#include "arith.h"
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#include "shell.h"
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#include "y.tab.h"
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#include "error.h"
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#include "memalloc.h"
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#include "var.h"
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int yylex(void);
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struct varname
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{
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struct varname *next;
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char name[1];
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};
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static struct varname *varnames;
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#undef YY_INPUT
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#define YY_INPUT(buf,result,max) \
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result = (*buf = *arith_buf++) ? 1 : YY_NULL;
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#define YY_NO_UNPUT
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%}
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%%
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[ \t\n] { ; }
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0x[a-fA-F0-9]+ {
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yylval.l_value = strtoarith_t(yytext, NULL, 16);
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return ARITH_NUM;
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}
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0[0-7]+ {
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yylval.l_value = strtoarith_t(yytext, NULL, 8);
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return ARITH_NUM;
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}
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[0-9]+ {
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yylval.l_value = strtoarith_t(yytext, NULL, 10);
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return ARITH_NUM;
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}
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[A-Za-z][A-Za-z0-9_]* {
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/*
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* If variable doesn't exist, we should initialize
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* it to zero.
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*/
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struct varname *temp;
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if (lookupvar(yytext) == NULL)
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setvarsafe(yytext, "0", 0);
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temp = ckmalloc(sizeof(struct varname) +
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strlen(yytext));
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temp->next = varnames;
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varnames = temp;
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yylval.s_value = strcpy(temp->name, yytext);
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return ARITH_VAR;
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}
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"(" { return ARITH_LPAREN; }
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")" { return ARITH_RPAREN; }
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"||" { return ARITH_OR; }
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"&&" { return ARITH_AND; }
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"|" { return ARITH_BOR; }
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"^" { return ARITH_BXOR; }
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"&" { return ARITH_BAND; }
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"==" { return ARITH_EQ; }
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"!=" { return ARITH_NE; }
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">" { return ARITH_GT; }
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">=" { return ARITH_GE; }
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"<" { return ARITH_LT; }
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"<=" { return ARITH_LE; }
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"<<" { return ARITH_LSHIFT; }
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">>" { return ARITH_RSHIFT; }
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"*" { return ARITH_MUL; }
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"/" { return ARITH_DIV; }
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"%" { return ARITH_REM; }
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"+" { return ARITH_ADD; }
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"-" { return ARITH_SUB; }
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"~" { return ARITH_BNOT; }
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"!" { return ARITH_NOT; }
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"=" { return ARITH_ASSIGN; }
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"+=" { return ARITH_ADDASSIGN; }
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"-=" { return ARITH_SUBASSIGN; }
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"*=" { return ARITH_MULASSIGN; }
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"/=" { return ARITH_DIVASSIGN; }
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"%=" { return ARITH_REMASSIGN; }
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">>=" { return ARITH_RSHASSIGN; }
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"<<=" { return ARITH_LSHASSIGN; }
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"&=" { return ARITH_BANDASSIGN; }
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"^=" { return ARITH_BXORASSIGN; }
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"|=" { return ARITH_BORASSIGN; }
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. {
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error("arith: syntax error: \"%s\"\n", arith_startbuf);
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}
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%%
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void
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arith_lex_reset(void)
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{
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struct varname *name, *next;
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YY_NEW_FILE;
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name = varnames;
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while (name != NULL) {
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next = name->next;
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ckfree(name);
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name = next;
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}
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varnames = NULL;
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}
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