ab6ebadde6
on tech-kern. (See man page.) Implementation by Greg Hudson. Also, remove special case for i386 in vector handling, although this code isn't actually used any more.
251 lines
6.5 KiB
Plaintext
251 lines
6.5 KiB
Plaintext
%{
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/* $NetBSD: scan.l,v 1.6 1996/08/31 20:58:28 mycroft Exp $ */
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/*
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* Copyright (c) 1992, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This software was developed by the Computer Systems Engineering group
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* at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
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* contributed to Berkeley.
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*
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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 by the University of
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* California, Lawrence Berkeley Laboratories.
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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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* 3. 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 by the University of
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* California, Berkeley and its contributors.
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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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* from: @(#)scan.l 8.1 (Berkeley) 6/6/93
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*/
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#include <sys/param.h>
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#include <errno.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include "config.h"
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#include "y.tab.h"
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int yyline;
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const char *yyfile;
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const char *lastfile;
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int include __P((const char *, int));
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/*
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* Data for returning to previous files from include files.
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*/
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struct incl {
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struct incl *in_prev; /* previous includes in effect, if any */
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YY_BUFFER_STATE in_buf; /* previous lex state */
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const char *in_fname; /* previous file name */
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int in_lineno; /* previous line number */
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int in_preveof; /* previous eoftoken */
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};
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static struct incl *incl;
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static int eoftoken; /* current EOF token */
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static void endinclude __P((void));
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#define yywrap() 1
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%}
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PATH [-/A-Za-z0-9_.]*[./][-/A-Za-z0-9_.]*
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WORD [A-Za-z_][-A-Za-z_0-9]*
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%%
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/* plain keywords */
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and { return AND; }
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at { return AT; }
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attach { return ATTACH; }
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build { return BUILD; }
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compile-with { return COMPILE_WITH; }
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config { return CONFIG; }
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define { return DEFINE; }
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device { return DEVICE; }
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dumps { return DUMPS; }
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flags { return FLAGS; }
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file { return XFILE; }
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include { return INCLUDE; }
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machine { return XMACHINE; }
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major { return MAJOR; }
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makeoptions { return MAKEOPTIONS; }
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maxusers { return MAXUSERS; }
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maxpartitions { return MAXPARTITIONS; }
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minor { return MINOR; }
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on { return ON; }
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options { return OPTIONS; }
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"pseudo-device" { return PSEUDO_DEVICE; }
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root { return ROOT; }
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source { return SOURCE; }
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swap { return SWAP; }
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vector { return VECTOR; }
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with { return WITH; }
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/* keywords with values */
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needs-count { yylval.val = FI_NEEDSCOUNT; return FFLAG; }
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needs-flag { yylval.val = FI_NEEDSFLAG; return FFLAG; }
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/* all the rest */
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{PATH} { yylval.str = intern(yytext); return PATHNAME; }
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{WORD} { yylval.str = intern(yytext); return WORD; }
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\"([^"]|\\\")*/\" {
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yylval.str = intern(yytext + 1);
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(void)input(); /* eat closing quote */
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return WORD;
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}
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0[0-7]* {
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yylval.val = strtol(yytext, NULL, 8);
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return NUMBER;
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}
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0[xX][0-9a-fA-F]+ {
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yylval.val = strtoul(yytext + 2, NULL, 16);
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return NUMBER;
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}
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[1-9][0-9]* {
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yylval.val = strtol(yytext, NULL, 10);
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return NUMBER;
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}
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\n/[ \t] {
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yyline++;
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}
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\n {
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yyline++;
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return '\n';
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}
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#.* { /* ignored (comment) */; }
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[ \t]* { /* ignored (white space) */; }
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. { return yytext[0]; }
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<<EOF>> {
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int tok;
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tok = eoftoken;
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eoftoken = YY_NULL;
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if (incl != NULL)
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endinclude();
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return (tok);
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}
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%%
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/*
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* Open the "main" file (conffile).
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*/
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int
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firstfile(fname)
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const char *fname;
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{
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if ((yyin = fopen(fname, "r")) == NULL)
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return (-1);
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yyfile = conffile = fname;
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yyline = 1;
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eoftoken = YY_NULL;
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return (0);
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}
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/*
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* Open the named file for inclusion at the current point. Returns 0 on
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* success (file opened and previous state pushed), nonzero on failure
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* (fopen failed, complaint made). The `ateof' parameter controls the
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* token to be returned at the end of the include file (typically '\n'
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* or ENDFILE).
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*/
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int
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include(fname, ateof)
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const char *fname;
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int ateof;
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{
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register FILE *fp;
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register struct incl *in;
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char *s;
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/* Kludge until files.* files are fixed. */
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if (strncmp(fname, "../../../", 9) == 0)
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fname += 9;
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s = (*fname == '/') ? strdup(fname) : sourcepath(fname);
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if ((fp = fopen(s, "r")) == NULL) {
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error("cannot open %s for reading: %s\n", s, strerror(errno));
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free(s);
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return (-1);
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}
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in = emalloc(sizeof *in);
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in->in_prev = incl;
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in->in_buf = YY_CURRENT_BUFFER;
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in->in_fname = yyfile;
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in->in_lineno = yyline;
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in->in_preveof = eoftoken;
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incl = in;
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yy_switch_to_buffer(yy_create_buffer(fp, YY_BUF_SIZE));
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yyfile = intern(s);
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yyline = 1;
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eoftoken = ateof;
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free(s);
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return (0);
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}
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/*
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* Terminate the most recent inclusion.
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*/
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static void
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endinclude()
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{
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register struct incl *in;
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if ((in = incl) == NULL)
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panic("endinclude");
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incl = in->in_prev;
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lastfile = yyfile;
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yy_delete_buffer(YY_CURRENT_BUFFER);
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(void)fclose(yyin);
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yy_switch_to_buffer(in->in_buf);
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yyfile = in->in_fname;
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yyline = in->in_lineno;
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eoftoken = in->in_preveof;
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free(in);
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}
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/*
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* Return the current line number. If yacc has looked ahead and caused
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* us to consume a newline, we have to subtract one. yychar is yacc's
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* token lookahead, so we can tell.
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*/
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int
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currentline()
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{
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extern int yychar;
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return (yyline - (yychar == '\n'));
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}
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