1 /* $NetBSD: scan.l,v 1.10 2003/06/10 17:19:04 dsl Exp $ */ 2 3 /* 4 * Copyright 1997 Piermont Information Systems Inc. 5 * All rights reserved. 6 * 7 * Written by Philip A. Nelson for Piermont Information Systems Inc. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. All advertising materials mentioning features or use of this software 18 * must display the following acknowledgement: 19 * This product includes software develooped for the NetBSD Project by 20 * Piermont Information Systems Inc. 21 * 4. The name of Piermont Information Systems Inc. may not be used to endorse 22 * or promote products derived from this software without specific prior 23 * written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY PIERMONT INFORMATION SYSTEMS INC. ``AS IS'' 26 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 28 * ARE DISCLAIMED. IN NO EVENT SHALL PIERMONT INFORMATION SYSTEMS INC. BE 29 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 32 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 33 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 34 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 35 * THE POSSIBILITY OF SUCH DAMAGE. 36 * 37 */ 38 39 %{ 40 /* scan.l: scanner description for menu compiler. */ 41 42 #include <stdio.h> 43 #include <string.h> 44 #include "defs.h" 45 #include "parse.h" 46 47 static int level; /* For nested comments. */ 48 static int comstart; /* line number of comment start. */ 49 50 %} 51 52 %x COMMENT 53 %x BRACE 54 55 %% 56 57 [ \t]+ { /* ignore spaces and tabs */ } 58 59 [\n] { line_no++; } 60 61 "="|";"|","|"("|")" { return (int)yytext[0]; } 62 63 x { return X; } 64 65 y { return Y; } 66 67 w { return W; } 68 69 h { return H; } 70 71 no { return NO; } 72 73 box { return BOX; } 74 75 sub { return SUB; } 76 77 help { return HELP; } 78 79 menu { return MENU; } 80 81 menus { return MENUS; } 82 83 next { return NEXT; } 84 85 exit { return EXIT; } 86 87 exitstring { return EXITSTRING; } 88 89 title { return TITLE; } 90 91 action { return ACTION; } 92 93 endwin { return ENDWIN; } 94 95 option { return OPTION; } 96 97 default { return DEFAULT; } 98 99 display { return DISPLAY; } 100 101 error { return ERROR; } 102 103 allow { return ALLOW; } 104 105 dynamic { return DYNAMIC; } 106 107 messages { return MESSAGES; } 108 109 scrollable { return SCROLLABLE; } 110 111 shortcut { return SHORTCUT; } 112 113 \"([^\"\n]*(\\\")?)*\" { 114 yylval.s_value = strdup (yytext); 115 max_strlen = max_strlen > strlen(yytext) 116 ? max_strlen : strlen(yytext) + 1; 117 return STRING; 118 } 119 120 [a-zA-Z][a-zA-Z0-9_]* { 121 yylval.s_value = strdup(yytext); 122 return(NAME); 123 } 124 125 [0-9]+ { 126 yylval.s_value = strdup(yytext); 127 return(INT_CONST); 128 } 129 130 "'"[^'\\]|(\\[athrn])|(\\[0-9][0-9]?[0-9]?)"'" { 131 yylval.s_value = strdup(yytext); 132 return(CHAR_CONST); 133 } 134 135 "/*" { level = 1; comstart = line_no; BEGIN COMMENT; } 136 137 <COMMENT>"/*" { level++; } 138 139 <COMMENT>"*/" { if (level-- == 1) BEGIN 0; } 140 141 <COMMENT>"\n" { line_no++; } 142 143 <COMMENT><<EOF>> { 144 yyerror ("EOF inside a comment that started at line %d", 145 comstart); 146 exit (1); 147 } 148 149 <COMMENT>. {/* eat character */} 150 151 "{" { level = 1; BEGIN BRACE; } 152 153 <BRACE>"{" { buff_add_ch(yytext[0]); level++; } 154 155 <BRACE>"}" { if (level-- == 1) { 156 BEGIN 0; 157 yylval.s_value = buff_copy(); 158 return CODE; 159 } else 160 buff_add_ch (yytext[0]); 161 } 162 163 <BRACE>"\n" { buff_add_ch (yytext[0]); line_no++; } 164 165 <BRACE>. { buff_add_ch (yytext[0]); } 166 167 . { 168 if (yytext[0] < ' ') 169 yyerror ("illegal character: ^%c",yytext[0] + '@'); 170 else 171 if (yytext[0] > '~') 172 yyerror ("illegal character: \\%3d", (int) yytext[0]); 173 else 174 yyerror ("illegal character: %s",yytext); 175 176 /* To quiet the compiler */ 177 if (0) unput(0); 178 } 179 %% 180 181 #ifdef SCAN 182 YYSTYPE yylval; 183 184 main() 185 { 186 int val; 187 188 line_no = 1; 189 while ( (val = yylex()) != 0 ) 190 printf ("val = %d\n yytext = %s\n", val, yytext); 191 } 192 #endif 193