1 /*
2 * Command format string lexer for CLI backend.
3 *
4 * --
5 * Copyright (C) 2015 Cumulus Networks, Inc.
6 *
7 * This file is part of GNU Zebra.
8 *
9 * GNU Zebra is free software; you can redistribute it and/or modify it
10 * under the terms of the GNU General Public License as published by the
11 * Free Software Foundation; either version 2, or (at your option) any
12 * later version.
13 *
14 * GNU Zebra is distributed in the hope that it will be useful, but
15 * WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 * General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with GNU Zebra; see the file COPYING. If not, write to the Free
21 * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
22 * 02111-1307, USA.
23 */
24
25 %top{
26 #ifdef HAVE_CONFIG_H
27 #include "config.h"
28 #endif
29 }
30 %{
31 /* ignore flex generated code in static analyzer */
32 #ifndef __clang_analyzer__
33
34 /* ignore harmless bugs in old versions of flex */
35 #pragma GCC diagnostic ignored "-Wsign-compare"
36 #pragma GCC diagnostic ignored "-Wmissing-prototypes"
37
38 #include "command_parse.h"
39
40 #define YY_USER_ACTION yylloc->last_column += yyleng;
41 #define LOC_STEP do { if (yylloc) { \
42 yylloc->first_column = yylloc->last_column; \
43 yylloc->first_line = yylloc->last_line; \
44 } } while(0)
45 %}
46
47 IPV4 A\.B\.C\.D
48 IPV4_PREFIX A\.B\.C\.D\/M
49 IPV6 X:X::X:X
50 IPV6_PREFIX X:X::X:X\/M
51 MAC X:X:X:X:X:X
52 MAC_PREFIX X:X:X:X:X:X\/M
53 VARIABLE [A-Z][-_A-Z:0-9]+
54 WORD (\-|\+)?[a-zA-Z0-9\*][-+_a-zA-Z0-9\*]*
55 NUMBER (\-|\+)?[0-9]{1,20}
56 RANGE \({NUMBER}[ ]?\-[ ]?{NUMBER}\)
57
58 /* yytext shall be a pointer */
59 %pointer
60 %option noyywrap
61 %option nounput
62 %option noinput
63 %option outfile="lib/command_lex.c"
64 %option header-file="lib/command_lex.h"
65 %option prefix="cmd_yy"
66 %option reentrant
67 %option bison-bridge
68 %option bison-locations
69
70 %%
71 %{
72 LOC_STEP;
73 %}
74
75 [ \t]+ LOC_STEP /* ignore whitespace */;
76 {IPV4} {yylval->string = XSTRDUP(MTYPE_LEX, yytext); return IPV4;}
77 {IPV4_PREFIX} {yylval->string = XSTRDUP(MTYPE_LEX, yytext); return IPV4_PREFIX;}
78 {IPV6} {yylval->string = XSTRDUP(MTYPE_LEX, yytext); return IPV6;}
79 {IPV6_PREFIX} {yylval->string = XSTRDUP(MTYPE_LEX, yytext); return IPV6_PREFIX;}
80 {MAC} {yylval->string = XSTRDUP(MTYPE_LEX, yytext); return MAC;}
81 {MAC_PREFIX} {yylval->string = XSTRDUP(MTYPE_LEX, yytext); return MAC_PREFIX;}
82 {VARIABLE} {yylval->string = XSTRDUP(MTYPE_LEX, yytext); return VARIABLE;}
83 {WORD} {yylval->string = XSTRDUP(MTYPE_LEX, yytext); return WORD;}
84 {RANGE} {yylval->string = XSTRDUP(MTYPE_LEX, yytext); return RANGE;}
85 . {return yytext[0];}
86 %%
87
88 static YY_BUFFER_STATE buffer;
89
set_lexer_string(yyscan_t * scn,const char * string)90 void set_lexer_string (yyscan_t *scn, const char *string)
91 {
92 *scn = NULL;
93 yylex_init(scn);
94 buffer = yy_scan_string (string, *scn);
95 }
96
cleanup_lexer(yyscan_t * scn)97 void cleanup_lexer (yyscan_t *scn)
98 {
99 // yy_delete_buffer (buffer, *scn);
100 yylex_destroy(*scn);
101 }
102
103 #endif /* __clang_analyzer__ */
104