freebsd-src/usr.sbin/config/lang.l
1994-05-26 05:23:31 +00:00

216 lines
4.9 KiB
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%{
/*-
* Copyright (c) 1980, 1993
* The Regents of the University of California. All rights reserved.
*
* 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.
*
* @(#)lang.l 8.1 (Berkeley) 6/6/93
*/
#include <ctype.h>
#include "y.tab.h"
#include "config.h"
#define tprintf if (do_trace) printf
/*
* Key word table
*/
struct kt {
char *kt_name;
int kt_val;
} key_words[] = {
{ "and", AND },
{ "args", ARGS },
{ "at", AT },
#if MACHINE_I386
{ "bio", BIO },
#endif MACHINE_I386
{ "config", CONFIG },
{ "controller", CONTROLLER },
{ "cpu", CPU },
{ "csr", CSR },
{ "device", DEVICE },
{ "disk", DISK },
{ "drive", DRIVE },
#if MACHINE_I386
{ "drq", DRQ },
#endif MACHINE_I386
{ "dst", DST },
{ "dumps", DUMPS },
{ "flags", FLAGS },
{ "hz", HZ },
{ "ident", IDENT },
{ "interleave", INTERLEAVE },
#if MACHINE_I386
{ "iomem", IOMEM },
{ "iosiz", IOSIZ },
{ "irq", IRQ },
#endif MACHINE_I386
{ "machine", MACHINE },
{ "major", MAJOR },
{ "makeoptions", MAKEOPTIONS },
{ "master", MASTER },
{ "maxusers", MAXUSERS },
{ "minor", MINOR },
#if MACHINE_I386
{ "net", NET },
#endif MACHINE_I386
{ "nexus", NEXUS },
{ "on", ON },
{ "options", OPTIONS },
#if MACHINE_I386
{ "port", PORT },
#endif MACHINE_I386
{ "priority", PRIORITY },
{ "pseudo-device",PSEUDO_DEVICE },
{ "root", ROOT },
#if MACHINE_HP300 || MACHINE_LUNA68K
{ "scode", NEXUS },
#endif
{ "sequential", SEQUENTIAL },
{ "size", SIZE },
{ "slave", SLAVE },
{ "swap", SWAP },
{ "tape", DEVICE },
#if MACHINE_I386
{ "tty", TTY },
#endif MACHINE_I386
{ "timezone", TIMEZONE },
{ "trace", TRACE },
{ "vector", VECTOR },
{ 0, 0 },
};
%}
WORD [A-Za-z_][-A-Za-z_]*
%%
{WORD} {
int i;
if ((i = kw_lookup(yytext)) == -1)
{
yylval.str = yytext;
tprintf("id(%s) ", yytext);
return ID;
}
tprintf("(%s) ", yytext);
return i;
}
\"[^"]+\" {
yytext[strlen(yytext)-1] = '\0';
yylval.str = yytext + 1;
return ID;
}
0[0-7]* {
yylval.val = octal(yytext);
tprintf("#O:%o ", yylval.val);
return NUMBER;
}
0x[0-9a-fA-F]+ {
yylval.val = hex(yytext);
tprintf("#X:%x ", yylval.val);
return NUMBER;
}
[1-9][0-9]* {
yylval.val = atoi(yytext);
tprintf("#D:%d ", yylval.val);
return NUMBER;
}
[0-9]"."[0-9]* {
double atof();
yylval.val = (int) (60 * atof(yytext) + 0.5);
return FPNUMBER;
}
"-" {
return MINUS;
}
"?" {
yylval.val = -1;
tprintf("? ");
return NUMBER;
}
\n/[ \t] {
yyline++;
tprintf("\n... ");
}
\n {
yyline++;
tprintf("\n");
return SEMICOLON;
}
#.* { /* Ignored (comment) */; }
[ \t]* { /* Ignored (white space) */; }
";" { return SEMICOLON; }
"," { return COMMA; }
"=" { return EQUALS; }
"@" { return AT; }
. { return yytext[0]; }
%%
/*
* kw_lookup
* Look up a string in the keyword table. Returns a -1 if the
* string is not a keyword otherwise it returns the keyword number
*/
kw_lookup(word)
register char *word;
{
register struct kt *kp;
for (kp = key_words; kp->kt_name != 0; kp++)
if (eq(word, kp->kt_name))
return kp->kt_val;
return -1;
}
/*
* Number conversion routines
*/
octal(str)
char *str;
{
int num;
(void) sscanf(str, "%o", &num);
return num;
}
hex(str)
char *str;
{
int num;
(void) sscanf(str+2, "%x", &num);
return num;
}