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
|
/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* Command format string lexer for CLI backend.
*
* --
* Copyright (C) 2015 Cumulus Networks, Inc.
*/
%top{
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
}
%{
/* ignore flex generated code in static analyzer */
#ifndef __clang_analyzer__
/* ignore harmless bugs in old versions of flex */
#pragma GCC diagnostic ignored "-Wsign-compare"
#pragma GCC diagnostic ignored "-Wmissing-prototypes"
#include "lib/command_parse.h"
#define YY_USER_ACTION yylloc->last_column += yyleng;
#define LOC_STEP do { if (yylloc) { \
yylloc->first_column = yylloc->last_column; \
yylloc->first_line = yylloc->last_line; \
} } while(0)
%}
IPV4 A\.B\.C\.D
IPV4_PREFIX A\.B\.C\.D\/M
IPV6 X:X::X:X
IPV6_PREFIX X:X::X:X\/M
MAC X:X:X:X:X:X
MAC_PREFIX X:X:X:X:X:X\/M
VARIABLE [A-Z][-_A-Z:0-9]+
WORD (\-|\+)?[a-zA-Z0-9\*][-+_a-zA-Z0-9\*]*
NUMBER (\-|\+)?[0-9]{1,20}
RANGE \({NUMBER}[ ]?\-[ ]?{NUMBER}\)
ASNUM ASNUM
/* yytext shall be a pointer */
%pointer
%option noyywrap
%option nounput
%option noinput
%option outfile="lib/command_lex.c"
%option header-file="lib/command_lex.h"
%option prefix="cmd_yy"
%option reentrant
%option bison-bridge
%option bison-locations
%%
%{
LOC_STEP;
%}
[ \t]+ LOC_STEP /* ignore whitespace */;
{ASNUM} {yylval->string = XSTRDUP(MTYPE_LEX, yytext); return ASNUM;}
{IPV4} {yylval->string = XSTRDUP(MTYPE_LEX, yytext); return IPV4;}
{IPV4_PREFIX} {yylval->string = XSTRDUP(MTYPE_LEX, yytext); return IPV4_PREFIX;}
{IPV6} {yylval->string = XSTRDUP(MTYPE_LEX, yytext); return IPV6;}
{IPV6_PREFIX} {yylval->string = XSTRDUP(MTYPE_LEX, yytext); return IPV6_PREFIX;}
{MAC} {yylval->string = XSTRDUP(MTYPE_LEX, yytext); return MAC;}
{MAC_PREFIX} {yylval->string = XSTRDUP(MTYPE_LEX, yytext); return MAC_PREFIX;}
{VARIABLE} {yylval->string = XSTRDUP(MTYPE_LEX, yytext); return VARIABLE;}
{WORD} {yylval->string = XSTRDUP(MTYPE_LEX, yytext); return WORD;}
{RANGE} {yylval->string = XSTRDUP(MTYPE_LEX, yytext); return RANGE;}
!\[ {yylval->string = NULL; return EXCL_BRACKET;}
. {return yytext[0];}
%%
static YY_BUFFER_STATE buffer;
void set_lexer_string (yyscan_t *scn, const char *string)
{
*scn = NULL;
yylex_init(scn);
buffer = yy_scan_string (string, *scn);
}
void cleanup_lexer (yyscan_t *scn)
{
// yy_delete_buffer (buffer, *scn);
yylex_destroy(*scn);
}
#endif /* __clang_analyzer__ */
|
