1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
|
/* -*-mode: flex-*- */
%top {
/* Include this before everything else, for various large-file definitions */
#include "config.h"
}
/*
* We want a reentrant scanner.
*/
%option reentrant
/*
* We don't use input, so don't generate code for it.
*/
%option noinput
/*
* We don't use unput, so don't generate code for it.
*/
%option nounput
/*
* We don't read interactively from the terminal.
*/
%option never-interactive
/*
* We want to stop processing when we get to the end of the input.
*/
%option noyywrap
/*
* Prefix scanner routines with "text_import_" rather than "yy", so this scanner
* can coexist with other scanners.
*/
%option prefix="text_import_"
/*
* We have to override the memory allocators so that we don't get
* "unused argument" warnings from the yyscanner argument (which
* we don't use, as we have a global memory allocator).
*
* We provide, as macros, our own versions of the routines generated by Flex,
* which just call malloc()/realloc()/free() (as the Flex versions do),
* discarding the extra argument.
*/
%option noyyalloc
%option noyyrealloc
%option noyyfree
%{
/********************************************************************************
*
* text_import_scanner.l
* Scanner for text import
* November 2010, Jaap Keuter <jaap.keuter@xs4all.nl>
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 1998 Gerald Combs
*
* Based on text2pcap-scanner.l by Ashok Narayanan <ashokn@cisco.com>
*
* SPDX-License-Identifier: GPL-2.0-or-later
*
*******************************************************************************/
#include <stdio.h>
#include <stdlib.h>
#include "text_import_scanner.h"
/*
* Disable diagnostics in the code generated by Flex.
*/
DIAG_OFF_FLEX
/*
* Flex (v 2.5.35) uses this symbol to "exclude" unistd.h
*/
#ifdef _WIN32
# define YY_NO_UNISTD_H
#endif
/*
* Sleazy hack to suppress compiler warnings in yy_fatal_error().
*/
#define YY_EXIT_FAILURE ((void)yyscanner, 2)
/*
* Macros for the allocators, to discard the extra argument.
*/
#define text_import_alloc(size, yyscanner) (void *)malloc(size)
#define text_import_realloc(ptr, size, yyscanner) (void *)realloc((char *)(ptr), (size))
#define text_import_free(ptr, yyscanner) free((char *)ptr)
%}
hexdigit [0-9A-Fa-f]
directive ^#TEXT2PCAP.*\r?\n
comment ^[\t ]*#.*\r?\n
byte [0-9A-Fa-f][0-9A-Fa-f][ \t]
byte_eol [0-9A-Fa-f][0-9A-Fa-f]\r?\n
offset [0-9A-Fa-f]+[: \t]
offset_eol [0-9A-Fa-f]+\r?\n
text [^ \n\t]+
mailfwd >
eol \r?\n\r?
%%
{byte} { parse_token(T_BYTE, yytext); }
{byte_eol} { parse_token(T_BYTE, yytext); parse_token(T_EOL, NULL); }
{offset} { parse_token(T_OFFSET, yytext); }
{offset_eol} { parse_token(T_OFFSET, yytext); parse_token(T_EOL, NULL); }
{mailfwd}{offset} { parse_token(T_OFFSET, yytext+1); }
{eol} { parse_token(T_EOL, NULL); }
[ \t] ; /* ignore whitespace */
{directive} { parse_token(T_DIRECTIVE, yytext); parse_token(T_EOL, NULL); }
{comment} { parse_token(T_EOL, NULL); }
{text} { parse_token(T_TEXT, yytext); }
<<EOF>> { parse_token(T_EOF, NULL); yyterminate(); }
%%
/*
* Turn diagnostics back on, so we check the code that we've written.
*/
DIAG_ON_FLEX
int
text_import_scan(FILE *input_file)
{
yyscan_t scanner;
if (text_import_lex_init(&scanner) != 0)
return errno;
text_import_set_in(input_file, scanner);
text_import_lex(scanner);
text_import_lex_destroy(scanner);
return 0;
}
|
