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%{
/* $OpenBSD: scan.l,v 1.2 1996/03/25 15:55:12 niklas Exp $ */
/* $NetBSD: scan.l,v 1.2 1996/03/03 17:28:34 thorpej Exp $ */
/*
* Copyright (c) 1992, 1993
* The Regents of the University of California. All rights reserved.
*
* This software was developed by the Computer Systems Engineering group
* at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
* contributed to Berkeley.
*
* All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Lawrence Berkeley Laboratories.
*
* 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. 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.
*
* from: @(#)scan.l 8.1 (Berkeley) 6/6/93
*/
#include <sys/param.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "config.h"
#include "y.tab.h"
int yyline;
const char *yyfile;
const char *lastfile;
int include __P((const char *, int));
/*
* Data for returning to previous files from include files.
*/
struct incl {
struct incl *in_prev; /* previous includes in effect, if any */
YY_BUFFER_STATE in_buf; /* previous lex state */
const char *in_fname; /* previous file name */
int in_lineno; /* previous line number */
int in_preveof; /* previous eoftoken */
};
static struct incl *incl;
static int eoftoken; /* current EOF token */
static void endinclude __P((void));
#define yywrap() 1
%}
PATH [-/A-Za-z0-9_.]*[./][-/A-Za-z0-9_.]*
WORD [A-Za-z_][-A-Za-z_0-9]*
%%
/* plain keywords */
and { return AND; }
at { return AT; }
compile-with { return COMPILE_WITH; }
config { return CONFIG; }
define { return DEFINE; }
device { return DEVICE; }
dumps { return DUMPS; }
flags { return FLAGS; }
file { return XFILE; }
include { return INCLUDE; }
machine { return XMACHINE; }
major { return MAJOR; }
makeoptions { return MAKEOPTIONS; }
maxusers { return MAXUSERS; }
maxpartitions { return MAXPARTITIONS; }
minor { return MINOR; }
on { return ON; }
options { return OPTIONS; }
"pseudo-device" { return PSEUDO_DEVICE; }
root { return ROOT; }
swap { return SWAP; }
vector { return VECTOR; }
/* keywords with values */
config-dependent { yylval.val = FI_CONFIGDEP; return FFLAG; }
device-driver { yylval.val = FI_DRIVER; return FFLAG; }
needs-count { yylval.val = FI_NEEDSCOUNT; return FFLAG; }
needs-flag { yylval.val = FI_NEEDSFLAG; return FFLAG; }
/* all the rest */
{PATH} { yylval.str = intern(yytext); return PATHNAME; }
{WORD} { yylval.str = intern(yytext); return WORD; }
\"([^"]|\\\")*/\" {
yylval.str = intern(yytext + 1);
(void)input(); /* eat closing quote */
return WORD;
}
0[0-7]* {
yylval.val = strtol(yytext, NULL, 8);
return NUMBER;
}
0[xX][0-9a-fA-F]+ {
yylval.val = strtoul(yytext + 2, NULL, 16);
return NUMBER;
}
[1-9][0-9]* {
yylval.val = strtol(yytext, NULL, 10);
return NUMBER;
}
\n/[ \t] {
yyline++;
}
\n {
yyline++;
return '\n';
}
#.* { /* ignored (comment) */; }
[ \t]* { /* ignored (white space) */; }
. { return yytext[0]; }
<<EOF>> {
int tok;
tok = eoftoken;
eoftoken = YY_NULL;
if (incl != NULL)
endinclude();
return (tok);
}
%%
/*
* Open the "main" file (conffile).
*/
int
firstfile(fname)
const char *fname;
{
if ((yyin = fopen(fname, "r")) == NULL)
return (-1);
yyfile = conffile = fname;
yyline = 1;
eoftoken = YY_NULL;
return (0);
}
/*
* Open the named file for inclusion at the current point. Returns 0 on
* success (file opened and previous state pushed), nonzero on failure
* (fopen failed, complaint made). The `ateof' parameter controls the
* token to be returned at the end of the include file (typically '\n'
* or ENDFILE).
*/
int
include(fname, ateof)
const char *fname;
int ateof;
{
register FILE *fp;
register struct incl *in;
if ((fp = fopen(fname, "r")) == NULL) {
error("cannot open %s for reading: %s\n",
fname, strerror(errno));
return (-1);
}
in = emalloc(sizeof *in);
in->in_prev = incl;
in->in_buf = YY_CURRENT_BUFFER;
in->in_fname = yyfile;
in->in_lineno = yyline;
in->in_preveof = eoftoken;
incl = in;
yy_switch_to_buffer(yy_create_buffer(fp, YY_BUF_SIZE));
yyfile = intern(fname);
yyline = 1;
eoftoken = ateof;
return (0);
}
/*
* Terminate the most recent inclusion.
*/
static void
endinclude()
{
register struct incl *in;
if ((in = incl) == NULL)
panic("endinclude");
incl = in->in_prev;
lastfile = yyfile;
yy_delete_buffer(YY_CURRENT_BUFFER);
(void)fclose(yyin);
yy_switch_to_buffer(in->in_buf);
yyfile = in->in_fname;
yyline = in->in_lineno;
eoftoken = in->in_preveof;
free(in);
}
/*
* Return the current line number. If yacc has looked ahead and caused
* us to consume a newline, we have to subtract one. yychar is yacc's
* token lookahead, so we can tell.
*/
int
currentline()
{
extern int yychar;
return (yyline - (yychar == '\n'));
}
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