lex.l revision 233294 
1%{
2/*
3 * Copyright (c) 1998 - 2000 Kungliga Tekniska H��gskolan
4 * (Royal Institute of Technology, Stockholm, Sweden).
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 *
11 * 1. Redistributions of source code must retain the above copyright
12 *    notice, this list of conditions and the following disclaimer.
13 *
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 *
18 * 3. Neither the name of the Institute 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 INSTITUTE 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 INSTITUTE 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
35/*
36 * This is to handle the definition of this symbol in some AIX
37 * headers, which will conflict with the definition that lex will
38 * generate for it.  It's only a problem for AIX lex.
39 */
40
41#undef ECHO
42
43#include "compile_et.h"
44#include "parse.h"
45#include "lex.h"
46
47static unsigned lineno = 1;
48static int getstring(void);
49
50#define YY_NO_UNPUT
51
52#undef ECHO
53
54%}
55
56%option nounput
57
58%%
59et			{ return ET; }
60error_table		{ return ET; }
61ec			{ return EC; }
62error_code		{ return EC; }
63prefix			{ return PREFIX; }
64index			{ return INDEX; }
65id			{ return ID; }
66end			{ return END; }
67[0-9]+			{ yylval.number = atoi(yytext); return NUMBER; }
68#[^\n]*			;
69[ \t]			;
70\n			{ lineno++; }
71\"			{ return getstring(); }
72[a-zA-Z0-9_]+		{ yylval.string = strdup(yytext); return STRING; }
73.			{ return *yytext; }
74%%
75
76#ifndef yywrap /* XXX */
77int
78yywrap ()
79{
80     return 1;
81}
82#endif
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