usr.sbin/config/lang.l

   1 %{
   2 /*-
   3  * Copyright (c) 1980, 1993
   4  *      The Regents of the University of California.  All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions
   8  * are met:
   9  * 1. Redistributions of source code must retain the above copyright
  10  *    notice, this list of conditions and the following disclaimer.
  11  * 2. Redistributions in binary form must reproduce the above copyright
  12  *    notice, this list of conditions and the following disclaimer in the
  13  *    documentation and/or other materials provided with the distribution.
  14  * 3. All advertising materials mentioning features or use of this software
  15  *    must display the following acknowledgement:
  16  *      This product includes software developed by the University of
  17  *      California, Berkeley and its contributors.
  18  * 4. Neither the name of the University nor the names of its contributors
  19  *    may be used to endorse or promote products derived from this software
  20  *    without specific prior written permission.
  21  *
  22  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  23  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  25  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  26  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  27  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  28  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  29  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  30  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  31  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  32  * SUCH DAMAGE.
  33  *
  34  *      @(#)lang.l      8.1 (Berkeley) 6/6/93
  35  * $FreeBSD: src/usr.sbin/config/lang.l,v 1.27 1999/11/09 07:20:22 peter Exp $
  36  */
  37
  38 #include <ctype.h>
  39 #include <string.h>
  40 #include "y.tab.h"
  41 #include "config.h"
  42
  43 /*
  44  * Key word table
  45  */
  46
  47 struct kt {
  48         const char *kt_name;
  49         int kt_val;
  50 } key_words[] = {
  51         { "at",         AT },
  52         { "bus",        BUS },
  53         { "config",     CONFIG },
  54         { "cpu",        CPU },
  55         { "device",     DEVICE },
  56         { "disable",    DISABLE },
  57         { "drive",      DRIVE },
  58         { "drq",        DRQ },
  59         { "flags",      FLAGS },
  60         { "ident",      IDENT },
  61         { "iomem",      IOMEM },
  62         { "iosiz",      IOSIZ },
  63         { "irq",        IRQ },
  64         { "machine",    CONFIG_MACHINE },
  65         { "machine_arch", CONFIG_MACHINE_ARCH },
  66         { "makeoptions", MAKEOPTIONS },
  67         { "maxusers",   MAXUSERS },
  68         { "nexus",      NEXUS },
  69         { "option",     OPTIONS },
  70         { "options",    OPTIONS },
  71         { "platform",   CONFIG_PLATFORM },
  72         { "port",       PORT },
  73         { "pseudo-device",PSEUDO_DEVICE },
  74         { "target",     TARGET },
  75         { "unit",       UNIT },
  76         { 0, 0 },
  77 };
  78
  79
  80 int kw_lookup(char *);
  81 int octal(char *);
  82 int hex(char *);
  83
  84 %}
  85 WORD    [A-Za-z_][-A-Za-z_]*
  86 ID      [A-Za-z_][-A-Za-z_0-9]*
  87 %START NONUM TOEOL
  88 %option noinput
  89 %option nounput
  90 %%
  91 <NONUM>{WORD}   {
  92                         int i;
  93
  94                         BEGIN 0;
  95                         if ((i = kw_lookup(yytext)) == -1)
  96                         {
  97                                 yylval.str = strdup(yytext);
  98                                 return(ID);
  99                         }
 100                         return(i);
 101                 }
 102 <INITIAL>{WORD}/[0-9]* {
 103                         int i;
 104
 105                         if ((i = kw_lookup(yytext)) == -1)
 106                                 REJECT;
 107                         if (i == DEVICE || i == PSEUDO_DEVICE || i == AT)
 108                                 BEGIN NONUM;
 109                         return(i);
 110                 }
 111 <INITIAL>{ID}   {
 112                         BEGIN 0;
 113                         yylval.str = strdup(yytext);
 114                         return(ID);
 115                 }
 116 \\\"[^"]+\\\"   {
 117                         BEGIN 0;
 118                         yytext[yyleng-2] = '"';
 119                         yytext[yyleng-1] = '\0';
 120                         yylval.str = strdup(yytext + 1);
 121                         return(ID);
 122                 }
 123 \"[^"]+\"       {
 124                         BEGIN 0;
 125                         yytext[yyleng-1] = '\0';
 126                         yylval.str = strdup(yytext + 1);
 127                         return(ID);
 128                 }
 129 <TOEOL>[^# \t\n]*       {
 130                         BEGIN 0;
 131                         yylval.str = strdup(yytext);
 132                         return(ID);
 133                 }
 134 0[0-7]*         {
 135                         yylval.val = octal(yytext);
 136                         return(NUMBER);
 137                 }
 138 0x[0-9a-fA-F]+  {
 139                         yylval.val = hex(yytext);
 140                         return(NUMBER);
 141                 }
 142 -?[1-9][0-9]*   {
 143                         yylval.val = atoi(yytext);
 144                         return(NUMBER);
 145                 }
 146 [0-9]"."[0-9]*  {
 147                         yylval.val = (int)(60 * atof(yytext) + 0.5);
 148                         return(FPNUMBER);
 149                 }
 150 "?"             {
 151                         yylval.val = -1;
 152                         return(NUMBER);
 153                 }
 154 \n/[ \t]        {
 155                         yyline++;
 156                 }
 157 \n              {
 158                         yyline++;
 159                         return(SEMICOLON);
 160                 }
 161 #.*             {       /* Ignored (comment) */;        }
 162 [ \t\f]*        {       /* Ignored (white space) */;    }
 163 ";"             {       return(SEMICOLON);              }
 164 ","             {       return(COMMA);                  }
 165 "="             {       BEGIN TOEOL; return(EQUALS);    }
 166 "@"             {       return(AT);                     }
 167 .               {       return(yytext[0]);              }
 168
 169 %%
 170 /*
 171  * kw_lookup
 172  *      Look up a string in the keyword table.  Returns a -1 if the
 173  *      string is not a keyword otherwise it returns the keyword number
 174  */
 175
 176 int
 177 kw_lookup(char *word)
 178 {
 179         struct kt *kp;
 180
 181         for (kp = key_words; kp->kt_name != NULL; kp++)
 182                 if (!strcmp(word, kp->kt_name))
 183                         return(kp->kt_val);
 184         return(-1);
 185 }
 186
 187 /*
 188  * Number conversion routines
 189  */
 190
 191 int
 192 octal(char *str)
 193 {
 194         int num;
 195
 196         sscanf(str, "%o", &num);
 197         return(num);
 198 }
 199
 200 int
 201 hex(char *str)
 202 {
 203         int num;
 204
 205         sscanf(str + 2, "%x", &num);
 206         return(num);
 207 }