lex.l revision 178846 
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/* $FreeBSD: head/contrib/com_err/lex.l 178846 2008-05-08 11:01:46Z dfr $ */
35
36/*
37 * This is to handle the definition of this symbol in some AIX
38 * headers, which will conflict with the definition that lex will
39 * generate for it.  It's only a problem for AIX lex.
40 */
41
42#undef ECHO
43
44#include "compile_et.h"
45#include "parse.h"
46#include "lex.h"
47
48#if 0
49RCSID("$Id: lex.l 15143 2005-05-16 08:52:54Z lha $");
50#endif
51
52static unsigned lineno = 1;
53static int getstring(void);
54
55#define YY_NO_UNPUT
56
57#undef ECHO
58
59%}
60
61
62%%
63et			{ return ET; }
64error_table		{ return ET; }
65ec			{ return EC; }
66error_code		{ return EC; }
67prefix			{ return PREFIX; }
68index			{ return INDEX; }
69id			{ return ID; }
70end			{ return END; }
71[0-9]+			{ yylval.number = atoi(yytext); return NUMBER; }
72#[^\n]*			;
73[ \t]			;
74\n			{ lineno++; }
75\"			{ return getstring(); }
76[a-zA-Z0-9_]+		{ yylval.string = strdup(yytext); return STRING; }
77.			{ return *yytext; }
78%%
79
80#ifndef yywrap /* XXX */
81int
82yywrap ()
83{
84     return 1;
85}
86#endif
87
88static int
89getstring(void)
90{
91    char x[128];
92    int i = 0;
93    int c;
94    int quote = 0;
95    while(i < sizeof(x) - 1 && (c = input()) != EOF){
96	if(quote) {
97	    x[i++] = c;
98	    quote = 0;
99	    continue;
100	}
101	if(c == '\n'){
102	    error_message("unterminated string");
103	    lineno++;
104	    break;
105	}
106	if(c == '\\'){
107	    quote++;
108	    continue;
109	}
110	if(c == '\"')
111	    break;
112	x[i++] = c;
113    }
114    x[i] = '\0';
115    yylval.string = strdup(x);
116    if (yylval.string == NULL)
117        err(1, "malloc");
118    return STRING;
119}
120
121void
122error_message (const char *format, ...)
123{
124     va_list args;
125
126     va_start (args, format);
127     fprintf (stderr, "%s:%d:", filename, lineno);
128     vfprintf (stderr, format, args);
129     va_end (args);
130     numerror++;
131}
132