1/*	$NetBSD: lex.l,v 1.3 2019/12/15 22:50:47 christos Exp $	*/
2
3%{
4/*
5 * Copyright (c) 1998 - 2017 Kungliga Tekniska H��gskolan
6 * (Royal Institute of Technology, Stockholm, Sweden).
7 * All rights reserved.
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 *
13 * 1. Redistributions of source code must retain the above copyright
14 *    notice, this list of conditions and the following disclaimer.
15 *
16 * 2. Redistributions in binary form must reproduce the above copyright
17 *    notice, this list of conditions and the following disclaimer in the
18 *    documentation and/or other materials provided with the distribution.
19 *
20 * 3. Neither the name of the Institute 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 INSTITUTE 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 INSTITUTE 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 * This is to handle the definition of this symbol in some AIX
39 * headers, which will conflict with the definition that lex will
40 * generate for it.  It's only a problem for AIX lex.
41 */
42
43#undef ECHO
44
45#include "compile_et.h"
46#include "parse.h"
47#include "lex.h"
48
49static unsigned lineno = 1;
50static int getstring(void);
51
52#define YY_NO_UNPUT
53
54#undef ECHO
55
56%}
57
58%option nounput
59
60%%
61et			{ return ET; }
62error_table		{ return ET; }
63ec			{ return EC; }
64error_code		{ return EC; }
65prefix			{ return PREFIX; }
66index			{ return INDEX; }
67id			{ return ID; }
68end			{ return END; }
69[0-9]+			{ yylval.number = atoi(yytext); return NUMBER; }
70#[^\n]*			;
71[ \t]			;
72\n			{ lineno++; }
73\"			{ return getstring(); }
74[a-zA-Z0-9_]+		{ yylval.string = strdup(yytext); return STRING; }
75.			{ return *yytext; }
76%%
77
78int
79yywrap ()
80{
81     return 1;
82}
83
84static int
85getstring(void)
86{
87    char x[128];
88    int i = 0;
89    int c;
90    int quote = 0;
91    while(i < sizeof(x) - 1 && (c = input()) != EOF){
92	if(quote) {
93	    x[i++] = c;
94	    quote = 0;
95	    continue;
96	}
97	if(c == '\n'){
98	    _lex_error_message("unterminated string");
99	    lineno++;
100	    break;
101	}
102	if(c == '\\'){
103	    quote++;
104	    continue;
105	}
106	if(c == '\"')
107	    break;
108	x[i++] = c;
109    }
110    x[i] = '\0';
111    yylval.string = strdup(x);
112    if (yylval.string == NULL)
113        err(1, "malloc");
114    return STRING;
115}
116
117void
118_lex_error_message (const char *format, ...)
119{
120     va_list args;
121
122     va_start (args, format);
123     fprintf (stderr, "%s:%d:", filename, lineno);
124     vfprintf (stderr, format, args);
125     va_end (args);
126     numerror++;
127}
128