scan.l revision 1.3 
1%{
2/*	$NetBSD: scan.l,v 1.3 2001/03/03 12:51:44 takemura Exp $	*/
3
4/*-
5 * Copyright (c) 1999
6 *         Shin Takemura and PocketBSD Project. All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 *    notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 *    notice, this list of conditions and the following disclaimer in the
15 *    documentation and/or other materials provided with the distribution.
16 * 3. All advertising materials mentioning features or use of this software
17 *    must display the following acknowledgement:
18 *	This product includes software developed by the PocketBSD project
19 *	and its contributors.
20 * 4. Neither the name of the project nor the names of its contributors
21 *    may be used to endorse or promote products derived from this software
22 *    without specific prior written permission.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * SUCH DAMAGE.
35 *
36 */
37
38#include <strings.h>
39#include "gram.h"
40
41#include "platid_gen.h"
42
43int	yyline;
44char	*getstr __P((char*));
45void	getcomment __P((void));
46
47#define	yywrap() 1
48
49%}
50
51%%
52#[^\n]*\n		{ yylval.str = strdup(yytext); yyline++; return DIRECTIVE; }
53\"([^"]|\\\")*\"	{ yylval.str = getstr(yytext); return NAME; }
54[a-zA-Z][0-9a-zA-Z]*	{ yylval.str = strdup(yytext); return FSYM; }
55[a-zA-Z][_0-9a-zA-Z]*	{ yylval.str = strdup(yytext); return MOD; }
56[0-9a-zA-Z]+	{ yylval.str = strdup(yytext); return SYM; }
57\n		{ yyline++; }
58"/*"		{ getcomment(); }
59[ \t]+		{ /* ignored */; }
60.		{ return yytext[0]; }
61
62%%
63
64char*
65getstr(char*s)
66{
67	char *res, *p, *p2;
68	res = strdup(s + 1);
69	for (p = p2 = res; *p != '\"'; p++) {
70		if (*p == '\\') {
71			*p2++ = *++p;
72		} else {
73			*p2++ = *p;
74		}
75	}
76	*p2 = '\0';
77	return (res);
78}
79
80void
81getcomment()
82{
83	int c;
84
85	for ( ; ; ) {
86		while ( (c = input()) != '*' && c != EOF ) {
87			if (c == '\n') yyline++;
88		}
89		if (c == '\n') yyline++;
90
91		if ( c == '*' ) {
92			while ( (c = input()) == '*' ) {
93				if (c == '\n') yyline++;
94			}
95			if (c == '\n') yyline++;
96			if ( c == '/' )
97				break;    /* found the end */
98		}
99
100		if ( c == EOF ) {
101			yyerror( "EOF in comment" );
102			break;
103		}
104	}
105}
106
107read_def()
108{
109	yyline = 1;
110	def_tree = NULL;
111	return yyparse();
112}
113