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 * $FreeBSD$ 36 */ 37 38 #include <ctype.h> 39 #include <string.h> 40 #include "y.tab.h" 41 #include "config.h" 42 43 #define YY_NO_UNPUT 44 45 /* 46 * Key word table 47 */ 48 49 struct kt { 50 char *kt_name; 51 int kt_val; 52 } key_words[] = { 53 { "config", CONFIG }, 54 { "cpu", CPU }, 55 { "device", DEVICE }, 56 { "hints", HINTS }, 57 { "ident", IDENT }, 58 { "machine", ARCH }, /* MACHINE is defined in /sys/param.h */ 59 { "makeoptions", MAKEOPTIONS }, 60 { "maxusers", MAXUSERS }, 61 { "option", OPTIONS }, 62 { "options", OPTIONS }, 63 { 0, 0 }, 64 }; 65 66 67 int kw_lookup(char *); 68 int octal(char *); 69 int hex(char *); 70 71 %} 72 WORD [A-Za-z_][-A-Za-z_]* 73 ID [A-Za-z_][-A-Za-z_0-9]* 74 %START NONUM TOEOL 75 %% 76 <NONUM>{WORD} { 77 int i; 78 79 BEGIN 0; 80 if ((i = kw_lookup(yytext)) == -1) 81 { 82 yylval.str = strdup(yytext); 83 return ID; 84 } 85 return i; 86 } 87 <INITIAL>{WORD}/[0-9]* { 88 int i; 89 90 if ((i = kw_lookup(yytext)) == -1) 91 REJECT; 92 if (i == DEVICE) 93 BEGIN NONUM; 94 return i; 95 } 96 <INITIAL>{ID} { 97 BEGIN 0; 98 yylval.str = strdup(yytext); 99 return ID; 100 } 101 \\\"[^"]+\\\" { 102 BEGIN 0; 103 yytext[yyleng-2] = '"'; 104 yytext[yyleng-1] = '\0'; 105 yylval.str = strdup(yytext + 1); 106 return ID; 107 } 108 \"[^"]+\" { 109 BEGIN 0; 110 yytext[yyleng-1] = '\0'; 111 yylval.str = strdup(yytext + 1); 112 return ID; 113 } 114 <TOEOL>[^# \t\n]* { 115 BEGIN 0; 116 yylval.str = strdup(yytext); 117 return ID; 118 } 119 0[0-7]* { 120 yylval.val = octal(yytext); 121 return NUMBER; 122 } 123 0x[0-9a-fA-F]+ { 124 yylval.val = hex(yytext); 125 return NUMBER; 126 } 127 -?[1-9][0-9]* { 128 yylval.val = atoi(yytext); 129 return NUMBER; 130 } 131 "?" { 132 yylval.val = -1; 133 return NUMBER; 134 } 135 \n/[ \t] { 136 yyline++; 137 } 138 \n { 139 yyline++; 140 return SEMICOLON; 141 } 142 #.* { /* Ignored (comment) */; } 143 [ \t\f]* { /* Ignored (white space) */; } 144 ";" { return SEMICOLON; } 145 "," { return COMMA; } 146 "=" { BEGIN TOEOL; return EQUALS; } 147 . { return yytext[0]; } 148 149 %% 150 /* 151 * kw_lookup 152 * Look up a string in the keyword table. Returns a -1 if the 153 * string is not a keyword otherwise it returns the keyword number 154 */ 155 156 int 157 kw_lookup(char *word) 158 { 159 struct kt *kp; 160 161 for (kp = key_words; kp->kt_name != 0; kp++) 162 if (eq(word, kp->kt_name)) 163 return kp->kt_val; 164 return -1; 165 } 166 167 /* 168 * Number conversion routines 169 */ 170 171 int 172 octal(char *str) 173 { 174 int num; 175 176 (void) sscanf(str, "%o", &num); 177 return num; 178 } 179 180 int 181 hex(char *str) 182 { 183 int num; 184 185 (void) sscanf(str+2, "%x", &num); 186 return num; 187 } 188