744 lines
17 KiB
Plaintext
744 lines
17 KiB
Plaintext
%{
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/* from 4.4BSD /usr/src/usr.bin/bc/bc.y */
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/*-
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* Copyright (c) 1991, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This module is believed to contain source code proprietary to AT&T.
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* Use and redistribution is subject to the Berkeley Software License
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* Agreement and your Software Agreement with AT&T (Western Electric).
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*
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* from bc.y 8.1 (Berkeley) 6/6/93
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*/
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/*
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* Copyright(C) Caldera International Inc. 2001-2002. All rights reserved.
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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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* Redistributions of source code and documentation must retain the
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* above copyright notice, this list of conditions and the following
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* disclaimer.
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* 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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* All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed or owned by Caldera
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* International, Inc.
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* Neither the name of Caldera International, Inc. nor the names of
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* other contributors may be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* USE OF THE SOFTWARE PROVIDED FOR UNDER THIS LICENSE BY CALDERA
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* INTERNATIONAL, INC. AND CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL CALDERA INTERNATIONAL, INC. BE
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* LIABLE FOR ANY DIRECT, INDIRECT INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
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* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
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* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
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* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#if __GNUC__ >= 3 && __GNUC_MINOR__ >= 4 || __GNUC__ >= 4
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#define USED __attribute__ ((used))
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#elif defined __GNUC__
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#define USED __attribute__ ((unused))
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#else
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#define USED
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#endif
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static const char sccsid[] USED = "@(#)bc.sl 1.24 (gritter) 7/3/05";
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#include <unistd.h>
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#include <signal.h>
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#include <limits.h>
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#include <inttypes.h>
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#include <stdarg.h>
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#include <stdio.h>
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#include <stdlib.h>
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typedef intptr_t YYSTYPE;
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#define YYSTYPE YYSTYPE
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static int cpeek(int c, int yes, int no);
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static int getch(void);
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static intptr_t bundle(int a, ...);
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static void routput(intptr_t *p);
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static void output(intptr_t *p);
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static void conout(intptr_t p, intptr_t s);
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static void pp(intptr_t);
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static void tp(intptr_t);
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static void yyinit(int argc, char *argv[]);
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static intptr_t *getout(void);
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static intptr_t *getf(intptr_t);
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static intptr_t *geta(intptr_t);
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static void yyerror(const char *);
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static void cantopen(const char *);
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extern int yylex(void);
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#if defined (__GLIBC__) && defined (_IO_getc_unlocked)
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#undef getc
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#define getc(f) _IO_getc_unlocked(f)
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#endif
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%}
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%right '='
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%left '+' '-'
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%left '*' '/' '%'
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%right '^'
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%left UMINUS
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%term LETTER DIGIT SQRT LENGTH _IF FFF EQ
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%term _WHILE _FOR NE LE GE INCR DECR
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%term _RETURN _BREAK _DEFINE BASE OBASE SCALE
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%term EQPL EQMI EQMUL EQDIV EQREM EQEXP
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%term _AUTO DOT
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%term QSTR
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%{
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#define THIS_BC_STRING_MAX 1000
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static FILE *in;
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static char cary[LINE_MAX + 1], *cp = { cary };
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static char string[THIS_BC_STRING_MAX + 3], *str = {string};
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static int crs = '0';
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static int rcrs = '0'; /* reset crs */
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static int bindx = 0;
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static int lev = 0;
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static int ln;
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static char *ss;
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static int bstack[10] = { 0 };
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static char *numb[15] = {
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" 0", " 1", " 2", " 3", " 4", " 5",
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" 6", " 7", " 8", " 9", " 10", " 11",
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" 12", " 13", " 14" };
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static intptr_t *pre, *post;
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%}
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%%
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start :
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| start stat tail
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{ output( (intptr_t *)$2 );}
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| start def dargs ')' '{' dlist slist '}'
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{ bundle( 6,pre, $7, post ,"0",numb[lev],"Q");
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conout( $$, $2 );
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rcrs = crs;
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output( (intptr_t *)"" );
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lev = bindx = 0;
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}
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;
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dlist : tail
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| dlist _AUTO dlets tail
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;
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stat : e
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{ bundle(2, $1, "ps." ); }
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{ bundle(1, "" ); }
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| QSTR
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{ bundle(3,"[",$1,"]P");}
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| LETTER '=' e
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{ bundle(3, $3, "s", $1 ); }
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| LETTER '[' e ']' '=' e
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{ bundle(4, $6, $3, ":", geta($1)); }
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| LETTER EQOP e
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{ bundle(6, "l", $1, $3, $2, "s", $1 ); }
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| LETTER '[' e ']' EQOP e
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{ bundle(8,$3, ";", geta($1), $6, $5, $3, ":", geta($1));}
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| _BREAK
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{ bundle(2, numb[lev-bstack[bindx-1]], "Q" ); }
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| _RETURN '(' e ')'
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{ bundle(4, $3, post, numb[lev], "Q" ); }
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| _RETURN '(' ')'
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{ bundle(4, "0", post, numb[lev], "Q" ); }
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| _RETURN
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{ bundle(4,"0",post,numb[lev],"Q"); }
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| SCALE '=' e
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{ bundle(2, $3, "k"); }
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| SCALE EQOP e
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{ bundle(4,"K",$3,$2,"k"); }
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| BASE '=' e
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{ bundle(2,$3, "i"); }
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| BASE EQOP e
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{ bundle(4,"I",$3,$2,"i"); }
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| OBASE '=' e
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{ bundle(2,$3,"o"); }
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| OBASE EQOP e
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{ bundle(4,"O",$3,$2,"o"); }
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| '{' slist '}'
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{ $$ = $2; }
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| FFF
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{ bundle(1,"fY"); }
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| error
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{ bundle(1,"c"); }
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| _IF CRS BLEV '(' re ')' stat
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{ conout( $7, $2 );
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bundle(3, $5, $2, " " );
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}
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| _WHILE CRS '(' re ')' stat BLEV
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{ bundle(3, $6, $4, $2 );
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conout( $$, $2 );
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bundle(3, $4, $2, " " );
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}
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| fprefix CRS re ';' e ')' stat BLEV
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{ bundle(5, $7, $5, "s.", $3, $2 );
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conout( $$, $2 );
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bundle(5, $1, "s.", $3, $2, " " );
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}
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| '~' LETTER '=' e
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{ bundle(3,$4,"S",$2); }
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;
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EQOP : EQPL
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{ $$ = (intptr_t)"+"; }
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| EQMI
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{ $$ = (intptr_t)"-"; }
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| EQMUL
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{ $$ = (intptr_t)"*"; }
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| EQDIV
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{ $$ = (intptr_t)"/"; }
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| EQREM
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{ $$ = (intptr_t)"%%"; }
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| EQEXP
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{ $$ = (intptr_t)"^"; }
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;
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fprefix : _FOR '(' e ';'
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{ $$ = $3; }
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;
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BLEV :
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{ --bindx; }
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;
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slist : stat
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| slist tail stat
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{ bundle(2, $1, $3 ); }
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;
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tail : '\n'
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{ln++;}
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| ';'
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;
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re : e EQ e
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{ bundle(3, $1, $3, "=" ); }
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| e '<' e
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{ bundle(3, $1, $3, ">" ); }
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| e '>' e
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{ bundle(3, $1, $3, "<" ); }
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| e NE e
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{ bundle(3, $1, $3, "!=" ); }
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| e GE e
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{ bundle(3, $1, $3, "!>" ); }
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| e LE e
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{ bundle(3, $1, $3, "!<" ); }
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| e
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{ bundle(2, $1, " 0!=" ); }
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;
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e : e '+' e
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{ bundle(3, $1, $3, "+" ); }
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| e '-' e
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{ bundle(3, $1, $3, "-" ); }
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| '-' e %prec UMINUS
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{ bundle(3, " 0", $2, "-" ); }
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| e '*' e
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{ bundle(3, $1, $3, "*" ); }
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| e '/' e
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{ bundle(3, $1, $3, "/" ); }
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| e '%' e
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{ bundle(3, $1, $3, "%%" ); }
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| e '^' e
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{ bundle(3, $1, $3, "^" ); }
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| LETTER '[' e ']'
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{ bundle(3,$3, ";", geta($1)); }
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| LETTER INCR
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{ bundle(4, "l", $1, "d1+s", $1 ); }
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| INCR LETTER
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{ bundle(4, "l", $2, "1+ds", $2 ); }
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| DECR LETTER
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{ bundle(4, "l", $2, "1-ds", $2 ); }
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| LETTER DECR
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{ bundle(4, "l", $1, "d1-s", $1 ); }
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| LETTER '[' e ']' INCR
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{ bundle(7,$3,";",geta($1),"d1+",$3,":",geta($1)); }
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| INCR LETTER '[' e ']'
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{ bundle(7,$4,";",geta($2),"1+d",$4,":",geta($2)); }
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| LETTER '[' e ']' DECR
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{ bundle(7,$3,";",geta($1),"d1-",$3,":",geta($1)); }
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| DECR LETTER '[' e ']'
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{ bundle(7,$4,";",geta($2),"1-d",$4,":",geta($2)); }
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| SCALE INCR
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{ bundle(1,"Kd1+k"); }
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| INCR SCALE
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{ bundle(1,"K1+dk"); }
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| SCALE DECR
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{ bundle(1,"Kd1-k"); }
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| DECR SCALE
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{ bundle(1,"K1-dk"); }
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| BASE INCR
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{ bundle(1,"Id1+i"); }
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| INCR BASE
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{ bundle(1,"I1+di"); }
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| BASE DECR
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{ bundle(1,"Id1-i"); }
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| DECR BASE
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{ bundle(1,"I1-di"); }
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| OBASE INCR
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{ bundle(1,"Od1+o"); }
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| INCR OBASE
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{ bundle(1,"O1+do"); }
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| OBASE DECR
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{ bundle(1,"Od1-o"); }
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| DECR OBASE
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{ bundle(1,"O1-do"); }
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| LETTER '(' cargs ')'
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{ bundle(4, $3, "l", getf($1), "x" ); }
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| LETTER '(' ')'
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{ bundle(3, "l", getf($1), "x" ); }
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| cons
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{ bundle(2, " ", $1 ); }
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| DOT cons
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{ bundle(2, " .", $2 ); }
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| cons DOT cons
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{ bundle(4, " ", $1, ".", $3 ); }
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| cons DOT
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{ bundle(3, " ", $1, "." ); }
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| DOT
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{ $$ = (intptr_t)"l."; }
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| LETTER
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{ bundle(2, "l", $1 ); }
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| LETTER '=' e
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{ bundle(3, $3, "ds", $1 ); }
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| LETTER EQOP e %prec '='
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{ bundle(6, "l", $1, $3, $2, "ds", $1 ); }
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| LETTER '[' e ']' '=' e
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{ bundle(5,$6,"d",$3,":",geta($1)); }
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| LETTER '[' e ']' EQOP e
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{ bundle(9,$3,";",geta($1),$6,$5,"d",$3,":",geta($1)); }
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| LENGTH '(' e ')'
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{ bundle(2,$3,"Z"); }
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| SCALE '(' e ')'
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{ bundle(2,$3,"X"); } /* must be before '(' e ')' */
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| '(' e ')'
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{ $$ = $2; }
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| '?'
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{ bundle(1, "?" ); }
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| SQRT '(' e ')'
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{ bundle(2, $3, "v" ); }
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| '~' LETTER
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{ bundle(2,"L",$2); }
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| SCALE '=' e
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{ bundle(2,$3,"dk"); }
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| SCALE EQOP e %prec '='
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{ bundle(4,"K",$3,$2,"dk"); }
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| BASE '=' e
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{ bundle(2,$3,"di"); }
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| BASE EQOP e %prec '='
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{ bundle(4,"I",$3,$2,"di"); }
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| OBASE '=' e
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{ bundle(2,$3,"do"); }
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| OBASE EQOP e %prec '='
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{ bundle(4,"O",$3,$2,"do"); }
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| SCALE
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{ bundle(1,"K"); }
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| BASE
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{ bundle(1,"I"); }
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| OBASE
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{ bundle(1,"O"); }
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;
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cargs : eora
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| cargs ',' eora
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{ bundle(2, $1, $3 ); }
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;
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eora: e
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| LETTER '[' ']'
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{bundle(2,"l",geta($1)); }
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;
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cons : constant
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{ *cp++ = '\0'; }
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constant:
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'_'
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{ $$ = (intptr_t)cp; *cp++ = '_'; }
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| DIGIT
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{ $$ = (intptr_t)cp; *cp++ = $1; }
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| constant DIGIT
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{ *cp++ = $2; }
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;
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CRS :
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{ $$ = (intptr_t)cp; *cp++ = crs++; *cp++ = '\0';
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if(crs == '[')crs+=3;
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if(crs == 'a')crs='{';
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if(crs >= 0241){yyerror("program too big");
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getout();
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}
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bstack[bindx++] = lev++; }
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;
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def : _DEFINE LETTER '('
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{ $$ = (intptr_t)getf($2);
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pre = (intptr_t *)"";
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post = (intptr_t *)"";
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lev = 1;
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bstack[bindx=0] = 0;
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}
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;
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dargs :
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| lora
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{ pp( $1 ); }
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| dargs ',' lora
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{ pp( $3 ); }
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;
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dlets : lora
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{ tp($1); }
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| dlets ',' lora
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{ tp($3); }
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;
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lora : LETTER
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| LETTER '[' ']'
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{ $$ = (intptr_t)geta($1); }
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;
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|
%%
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# define error 256
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static int peekc = -1;
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static int sargc;
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static int ifile;
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static char **sargv;
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static char funtab[52] = {
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01,0,02,0,03,0,04,0,05,0,06,0,07,0,010,0,011,0,012,0,013,0,014,0,015,0,016,0,017,0,
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020,0,021,0,022,0,023,0,024,0,025,0,026,0,027,0,030,0,031,0,032,0 };
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static char atab[52] = {
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0241,0,0242,0,0243,0,0244,0,0245,0,0246,0,0247,0,0250,0,0251,0,0252,0,0253,0,
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0254,0,0255,0,0256,0,0257,0,0260,0,0261,0,0262,0,0263,0,0264,0,0265,0,0266,0,
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0267,0,0270,0,0271,0,0272,0};
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static char *letr[26] = {
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"a","b","c","d","e","f","g","h","i","j",
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"k","l","m","n","o","p","q","r","s","t",
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"u","v","w","x","y","z" } ;
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/*static char *dot = { "." };*/
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int
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yylex(void){
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int c, ch;
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restart:
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c = getch();
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peekc = -1;
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while( c == ' ' || c == '\t' ) c = getch();
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if(c == '\\'){
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getch();
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goto restart;
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}
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if( c<= 'z' && c >= 'a' ) {
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/* look ahead to look for reserved words */
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peekc = getch();
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if( peekc >= 'a' && peekc <= 'z' ){ /* must be reserved word */
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if( c=='i' && peekc=='f' ){ c=_IF; goto skip; }
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if( c=='w' && peekc=='h' ){ c=_WHILE; goto skip; }
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if( c=='f' && peekc=='o' ){ c=_FOR; goto skip; }
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if( c=='s' && peekc=='q' ){ c=SQRT; goto skip; }
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if( c=='r' && peekc=='e' ){ c=_RETURN; goto skip; }
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if( c=='b' && peekc=='r' ){ c=_BREAK; goto skip; }
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if( c=='d' && peekc=='e' ){ c=_DEFINE; goto skip; }
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if( c=='s' && peekc=='c' ){ c= SCALE; goto skip; }
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if( c=='b' && peekc=='a' ){ c=BASE; goto skip; }
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if( c=='i' && peekc == 'b'){ c=BASE; goto skip; }
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if( c=='o' && peekc=='b' ){ c=OBASE; goto skip; }
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if( c=='d' && peekc=='i' ){ c=FFF; goto skip; }
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if( c=='a' && peekc=='u' ){ c=_AUTO; goto skip; }
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if( c == 'l' && peekc=='e'){ c=LENGTH; goto skip; }
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if( c == 'q' && peekc == 'u'){getout();}
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/* could not be found */
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return( error );
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skip: /* skip over rest of word */
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peekc = -1;
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while( (ch = getch()) >= 'a' && ch <= 'z' );
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peekc = ch;
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return( c );
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}
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/* usual case; just one single letter */
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|
|
yylval = (intptr_t)letr[c-'a'];
|
|
return( LETTER );
|
|
}
|
|
if( c>= '0' && c <= '9' || c>= 'A' && c<= 'F' ){
|
|
yylval = c;
|
|
return( DIGIT );
|
|
}
|
|
switch( c ){
|
|
case '.': return( DOT );
|
|
case '=':
|
|
switch( peekc = getch() ){
|
|
case '=': c=EQ; goto gotit;
|
|
case '+': c=EQPL; goto gotit;
|
|
case '-': c=EQMI; goto gotit;
|
|
case '*': c=EQMUL; goto gotit;
|
|
case '/': c=EQDIV; goto gotit;
|
|
case '%': c=EQREM; goto gotit;
|
|
case '^': c=EQEXP; goto gotit;
|
|
default: return( '=' );
|
|
gotit: peekc = -1; return(c);
|
|
}
|
|
case '+': return( cpeek( '+', INCR, cpeek( '=', EQPL, '+') ) );
|
|
case '-': return( cpeek( '-', DECR, cpeek( '=', EQMI, '-') ) ) ;
|
|
case '<': return( cpeek( '=', LE, '<' ) );
|
|
case '>': return( cpeek( '=', GE, '>' ) );
|
|
case '!': return( cpeek( '=', NE, '!' ) );
|
|
case '/':
|
|
if((peekc = getch()) == '*'){
|
|
peekc = -1;
|
|
while((getch() != '*') || ((peekc = getch()) != '/'));
|
|
peekc = -1;
|
|
goto restart;
|
|
}
|
|
else if (peekc == '=') {
|
|
c=EQDIV;
|
|
goto gotit;
|
|
}
|
|
else return(c);
|
|
case '*':
|
|
return( cpeek( '=', EQMUL, '*' ) );
|
|
case '%':
|
|
return( cpeek( '=', EQREM, '%' ) );
|
|
case '^':
|
|
return( cpeek( '=', EQEXP, '^' ) );
|
|
case '"':
|
|
yylval = (intptr_t)str;
|
|
while((c=getch()) != '"'){*str++ = c;
|
|
if(str >= &string[sizeof string - 1]){yyerror("string space exceeded");
|
|
getout();
|
|
}
|
|
}
|
|
*str++ = '\0';
|
|
return(QSTR);
|
|
default: return( c );
|
|
}
|
|
}
|
|
|
|
static int
|
|
cpeek(int c, int yes, int no){
|
|
if( (peekc=getch()) != c ) return( no );
|
|
else {
|
|
peekc = -1;
|
|
return( yes );
|
|
}
|
|
}
|
|
|
|
static int
|
|
getch(void){
|
|
int ch;
|
|
loop:
|
|
ch = (peekc < 0) ? getc(in) : peekc;
|
|
peekc = -1;
|
|
if(ch != EOF)return(ch);
|
|
if(++ifile > sargc){
|
|
if(ifile >= sargc+2)getout();
|
|
in = stdin;
|
|
ln = 0;
|
|
goto loop;
|
|
}
|
|
fclose(in);
|
|
if((in = fopen(sargv[ifile],"r")) != NULL){
|
|
ln = 0;
|
|
ss = sargv[ifile];
|
|
goto loop;
|
|
}
|
|
cantopen(sargv[ifile]);
|
|
return EOF;
|
|
}
|
|
# define b_sp_max 3000
|
|
static intptr_t b_space [ b_sp_max ];
|
|
static intptr_t * b_sp_nxt = { b_space };
|
|
|
|
static int bdebug = 0;
|
|
|
|
static intptr_t
|
|
bundle(int a, ...){
|
|
intptr_t i, *q;
|
|
va_list ap;
|
|
|
|
i = a;
|
|
q = b_sp_nxt;
|
|
if( bdebug ) printf("bundle %ld elements at %lo\n",(long)i, (long)q );
|
|
va_start(ap, a);
|
|
while(i-- > 0){
|
|
if( b_sp_nxt >= & b_space[b_sp_max] ) yyerror( "bundling space exceeded" );
|
|
* b_sp_nxt++ = va_arg(ap, intptr_t);
|
|
}
|
|
va_end(ap);
|
|
* b_sp_nxt++ = 0;
|
|
yyval = (intptr_t)q;
|
|
return( (intptr_t)q );
|
|
}
|
|
|
|
static void
|
|
routput(intptr_t *p) {
|
|
if( bdebug ) printf("routput(%lo)\n", (long)p );
|
|
if( p >= &b_space[0] && p < &b_space[b_sp_max]){
|
|
/* part of a bundle */
|
|
while( *p != 0 ) routput( (intptr_t *)*p++ );
|
|
}
|
|
else printf( (char *)p ); /* character string */
|
|
}
|
|
|
|
static void
|
|
output(intptr_t *p) {
|
|
routput( p );
|
|
b_sp_nxt = & b_space[0];
|
|
printf( "\n" );
|
|
fflush(stdout);
|
|
cp = cary;
|
|
crs = rcrs;
|
|
}
|
|
|
|
static void
|
|
conout(intptr_t p, intptr_t s) {
|
|
printf("[");
|
|
routput( (intptr_t *)p );
|
|
printf("]s%s\n", (char *)s );
|
|
fflush(stdout);
|
|
lev--;
|
|
}
|
|
|
|
static void
|
|
yyerror(const char *s) {
|
|
if(ifile > sargc)ss="teletype";
|
|
fprintf(stderr, "%s on line %d, %s\n",
|
|
s ,ss?ln+1:0,ss?ss:"command line");
|
|
cp = cary;
|
|
crs = rcrs;
|
|
bindx = 0;
|
|
lev = 0;
|
|
b_sp_nxt = &b_space[0];
|
|
}
|
|
|
|
static void
|
|
cantopen(const char *fn)
|
|
{
|
|
char spc[280];
|
|
char *oss = ss;
|
|
|
|
ss = 0;
|
|
snprintf(spc, sizeof spc, "can't open input file %s", fn);
|
|
yyerror(spc);
|
|
ss = oss;
|
|
}
|
|
|
|
static void
|
|
pp(intptr_t s) {
|
|
/* puts the relevant stuff on pre and post for the letter s */
|
|
|
|
bundle(3, "S", s, pre );
|
|
pre = (intptr_t *)yyval;
|
|
bundle(4, post, "L", s, "s." );
|
|
post = (intptr_t *)yyval;
|
|
}
|
|
|
|
static void
|
|
tp(intptr_t s) { /* same as pp, but for temps */
|
|
bundle(3, "0S", s, pre );
|
|
pre = (intptr_t *)yyval;
|
|
bundle(4, post, "L", s, "s." );
|
|
post = (intptr_t *)yyval;
|
|
}
|
|
|
|
static void
|
|
yyinit(int argc,char **argv) {
|
|
signal(SIGINT, SIG_IGN);
|
|
sargv=argv;
|
|
sargc= -- argc;
|
|
if(sargc == 0)in=stdin;
|
|
else if((in = fopen(sargv[1],"r")) == NULL) {
|
|
cantopen(sargv[1]);
|
|
exit(0);
|
|
}
|
|
ifile = 1;
|
|
ln = 0;
|
|
ss = sargv[1];
|
|
}
|
|
|
|
static intptr_t *
|
|
getout(void){
|
|
printf("q");
|
|
fflush(stdout);
|
|
exit(0);
|
|
/*NOTREACHED*/
|
|
return(NULL);
|
|
}
|
|
|
|
static intptr_t *
|
|
getf(intptr_t p) {
|
|
return(intptr_t *)(&funtab[2*(*((char *)p) -0141)]);
|
|
}
|
|
|
|
static intptr_t *
|
|
geta(intptr_t p) {
|
|
return(intptr_t *)(&atab[2*(*((char *)p) - 0141)]);
|
|
}
|
|
|
|
int
|
|
main(int argc, char **argv)
|
|
{
|
|
extern int yyparse(void);
|
|
const char optstring[] = "cdl";
|
|
int p[2];
|
|
int i;
|
|
int cflag = 0, lflag = 0;
|
|
|
|
|
|
#ifdef __GLIBC__
|
|
putenv("POSIXLY_CORRECT=1");
|
|
#endif
|
|
while ((i = getopt(argc, argv, optstring)) != EOF) {
|
|
switch (i) {
|
|
case 'd':
|
|
case 'c':
|
|
cflag = 1;
|
|
break;
|
|
case 'l':
|
|
lflag = 1;
|
|
break;
|
|
default:
|
|
exit(2);
|
|
}
|
|
}
|
|
argv += optind - 1, argc -= optind - 1;
|
|
if (cflag) {
|
|
yyinit(argc, argv);
|
|
yyparse();
|
|
exit(0);
|
|
}
|
|
if (lflag) {
|
|
*argv-- = LIBB;
|
|
argc++;
|
|
}
|
|
pipe(p);
|
|
if (fork()==0) {
|
|
close(1);
|
|
dup(p[1]);
|
|
close(p[0]);
|
|
close(p[1]);
|
|
yyinit(argc, argv);
|
|
yyparse();
|
|
exit(0);
|
|
}
|
|
close(0);
|
|
dup(p[0]);
|
|
close(p[0]);
|
|
close(p[1]);
|
|
execl(DC, "dc", "-", NULL);
|
|
execl("/usr/5bin/dc", "dc", "-", NULL);
|
|
execl("/usr/local/bin/dc", "dc", "-", NULL);
|
|
execl("/usr/contrib/bin/dc", "dc", "-", NULL);
|
|
execl("/usr/bin/dc", "dc", "-", NULL);
|
|
return(1);
|
|
}
|