2 * collectd - src/liboconfig/scanner.l
3 * Copyright (C) 2007 Florian Forster
4 * Copyright (C) 2008 Sebastian Harl
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the "Software"),
8 * to deal in the Software without restriction, including without limitation
9 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
10 * and/or sell copies of the Software, and to permit persons to whom the
11 * Software is furnished to do so, subject to the following conditions:
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
19 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
21 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
22 * DEALINGS IN THE SOFTWARE.
25 * Florian Forster <octo at collectd.org>
26 * Sebastian Harl <sh at tokkee.org>
30 /* lex and yacc do some weird stuff, so turn off some warnings. */
31 #if defined(__clang__)
32 # pragma clang diagnostic ignored "-Wunused-function"
33 # pragma clang diagnostic ignored "-Wunneeded-internal-declaration"
38 #include "aux_types.h"
41 /* multiline string buffer */
42 static char *ml_buffer = NULL;
43 static int ml_pos = 0;
44 static int ml_len = 0;
46 #define ml_free (ml_len - ml_pos)
48 static void ml_append (char *);
53 #define yyterminate() \
54 do { free (ml_buffer); ml_buffer = NULL; ml_pos = 0; ml_len = 0; \
55 return YY_NULL; } while (0)
61 NON_WHITE_SPACE [^\ \t\b]
63 QUOTED_STRING ([^\\"]+|\\.)*
64 UNQUOTED_STRING [0-9A-Za-z_]+
65 HEX_NUMBER 0[xX][0-9a-fA-F]+
67 DEC_NUMBER [\+\-]?[0-9]+
68 FLOAT_NUMBER [\+\-]?[0-9]*\.[0-9]+([eE][\+\-][0-9]+)?
69 NUMBER ({FLOAT_NUMBER}|{HEX_NUMBER}|{OCT_NUMBER}|{DEC_NUMBER})
70 BOOL_TRUE (true|yes|on)
71 BOOL_FALSE (false|no|off)
73 PORT (6(5(5(3[0-5]|[0-2][0-9])|[0-4][0-9][0-9])|[0-4][0-9][0-9][0-9])|[1-5][0-9][0-9][0-9][0-9]|[1-9][0-9]?[0-9]?[0-9]?)
75 IP_BYTE (2(5[0-5]|[0-4][0-9])|1[0-9][0-9]|[1-9]?[0-9])
76 IPV4_ADDR {IP_BYTE}\.{IP_BYTE}\.{IP_BYTE}\.{IP_BYTE}(:{PORT})?
78 /* IPv6 address according to http://www.ietf.org/rfc/rfc2373.txt
79 * This supports embedded IPv4 addresses as well but does not strictly check
80 * for the right prefix (::0:<v4> or ::FFFF:<v4>) because there are too many
81 * ways to correctly represent the zero bytes. It's up to the user to check
82 * for valid addresses. */
83 HEX16 ([0-9A-Fa-f]{1,4})
84 V6_PART ({HEX16}:{HEX16}|{IPV4_ADDR})
85 IPV6_BASE ({HEX16}:){6}{V6_PART}|::({HEX16}:){5}{V6_PART}|({HEX16})?::({HEX16}:){4}{V6_PART}|(({HEX16}:){0,1}{HEX16})?::({HEX16}:){3}{V6_PART}|(({HEX16}:){0,2}{HEX16})?::({HEX16}:){2}{V6_PART}|(({HEX16}:){0,3}{HEX16})?::{HEX16}:{V6_PART}|(({HEX16}:){0,4}{HEX16})?::{V6_PART}|(({HEX16}:){0,5}{HEX16})?::{HEX16}|(({HEX16}:){0,6}{HEX16})?::
86 IPV6_ADDR ({IPV6_BASE})|(\[{IPV6_BASE}\](:{PORT})?)
90 {COMMENT} {/* ignore */}
92 \\{EOL} {/* continue line */}
96 "<" {return (OPENBRAC);}
97 ">" {return (CLOSEBRAC);}
98 {BOOL_TRUE} {yylval.boolean = 1; return (BTRUE);}
99 {BOOL_FALSE} {yylval.boolean = 0; return (BFALSE);}
101 {IPV4_ADDR} {yylval.string = yytext; return (UNQUOTED_STRING);}
102 {IPV6_ADDR} {yylval.string = yytext; return (UNQUOTED_STRING);}
104 {NUMBER} {yylval.number = strtod (yytext, NULL); return (NUMBER);}
106 \"{QUOTED_STRING}\" {yylval.string = yytext; return (QUOTED_STRING);}
107 {UNQUOTED_STRING} {yylval.string = yytext; return (UNQUOTED_STRING);}
109 \"{QUOTED_STRING}\\{EOL} {
110 int len = strlen (yytext);
114 /* remove "\\<EOL>" */
115 if ('\r' == yytext[len - 2])
124 <ML>^{WHITE_SPACE}+ {/* remove leading white-space */}
125 <ML>{NON_WHITE_SPACE}{QUOTED_STRING}\\{EOL} {
126 int len = strlen (yytext);
128 /* remove "\\<EOL>" */
129 if ('\r' == yytext[len - 2])
137 <ML>{NON_WHITE_SPACE}{QUOTED_STRING}\" {
139 yylval.string = ml_buffer;
142 return (QUOTED_STRING);
145 static void ml_append (char *string)
147 int len = strlen (string);
150 if (ml_free <= len) {
151 ml_len += len - ml_free + 1;
152 ml_buffer = (char *)realloc (ml_buffer, ml_len);
153 if (NULL == ml_buffer)
154 YY_FATAL_ERROR ("out of dynamic memory in ml_append");
157 s = snprintf (ml_buffer + ml_pos, ml_free, "%s", string);
158 if ((0 > s) || (ml_free <= s))
159 YY_FATAL_ERROR ("failed to write to multiline buffer");