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 const 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 { "profile", PROFILE }, 62 { "option", OPTIONS }, 63 { "options", OPTIONS }, 64 { 0, 0 }, 65 }; 66 67 68 int kw_lookup(char *); 69 int octal(char *); 70 int hex(char *); 71 72 %} 73 WORD [A-Za-z_][-A-Za-z_]* 74 ID [A-Za-z_][-A-Za-z_0-9]* 75 %START NONUM TOEOL 76 %% 77 <NONUM>{WORD} { 78 int i; 79 80 BEGIN 0; 81 if ((i = kw_lookup(yytext)) == -1) 82 { 83 yylval.str = strdup(yytext); 84 return ID; 85 } 86 return i; 87 } 88 <INITIAL>{WORD}/[0-9]* { 89 int i; 90 91 if ((i = kw_lookup(yytext)) == -1) 92 REJECT; 93 if (i == DEVICE) 94 BEGIN NONUM; 95 return i; 96 } 97 <INITIAL>{ID} { 98 BEGIN 0; 99 yylval.str = strdup(yytext); 100 return ID; 101 } 102 \\\"[^"]+\\\" { 103 BEGIN 0; 104 yytext[yyleng-2] = '"'; 105 yytext[yyleng-1] = '\0'; 106 yylval.str = strdup(yytext + 1); 107 return ID; 108 } 109 \"[^"]+\" { 110 BEGIN 0; 111 yytext[yyleng-1] = '\0'; 112 yylval.str = strdup(yytext + 1); 113 return ID; 114 } 115 <TOEOL>[^# \t\n]* { 116 BEGIN 0; 117 yylval.str = strdup(yytext); 118 return ID; 119 } 120 0[0-7]* { 121 yylval.val = octal(yytext); 122 return NUMBER; 123 } 124 0x[0-9a-fA-F]+ { 125 yylval.val = hex(yytext); 126 return NUMBER; 127 } 128 -?[1-9][0-9]* { 129 yylval.val = atoi(yytext); 130 return NUMBER; 131 } 132 "?" { 133 yylval.val = -1; 134 return NUMBER; 135 } 136 \n/[ \t] { 137 yyline++; 138 } 139 \n { 140 yyline++; 141 return SEMICOLON; 142 } 143 #.* { /* Ignored (comment) */; } 144 [ \t\f]* { /* Ignored (white space) */; } 145 ";" { return SEMICOLON; } 146 "," { return COMMA; } 147 "=" { BEGIN TOEOL; return EQUALS; } 148 . { return yytext[0]; } 149 150 %% 151 /* 152 * kw_lookup 153 * Look up a string in the keyword table. Returns a -1 if the 154 * string is not a keyword otherwise it returns the keyword number 155 */ 156 157 int 158 kw_lookup(char *word) 159 { 160 struct kt *kp; 161 162 for (kp = key_words; kp->kt_name != 0; kp++) 163 if (eq(word, kp->kt_name)) 164 return kp->kt_val; 165 return -1; 166 } 167 168 /* 169 * Number conversion routines 170 */ 171 172 int 173 octal(char *str) 174 { 175 int num; 176 177 (void) sscanf(str, "%o", &num); 178 return num; 179 } 180 181 int 182 hex(char *str) 183 { 184 int num; 185 186 (void) sscanf(str+2, "%x", &num); 187 return num; 188 } 189