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>
32 #include "aux_types.h"
35 /* multiline string buffer */
36 static char *ml_buffer = NULL;
37 static int ml_pos = 0;
38 static int ml_len = 0;
40 #define ml_free (ml_len - ml_pos)
42 static void ml_append (char *);
47 #define yyterminate() \
48 do { free (ml_buffer); ml_buffer = NULL; ml_pos = 0; ml_len = 0; \
49 return YY_NULL; } while (0)
57 NON_WHITE_SPACE [^\ \t\b]
59 QUOTED_STRING ([^\\"]+|\\.)*
60 UNQUOTED_STRING [0-9A-Za-z_]+
61 HEX_NUMBER 0[xX][0-9a-fA-F]+
63 DEC_NUMBER [\+\-]?[0-9]+
64 FLOAT_NUMBER [\+\-]?[0-9]*\.[0-9]+([eE][\+\-][0-9]+)?
65 NUMBER ({FLOAT_NUMBER}|{HEX_NUMBER}|{OCT_NUMBER}|{DEC_NUMBER})
66 BOOL_TRUE (true|yes|on)
67 BOOL_FALSE (false|no|off)
69 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]?)
71 IP_BYTE (2(5[0-5]|[0-4][0-9])|1[0-9][0-9]|[1-9]?[0-9])
72 IPV4_ADDR {IP_BYTE}\.{IP_BYTE}\.{IP_BYTE}\.{IP_BYTE}(:{PORT})?
74 /* IPv6 address according to http://www.ietf.org/rfc/rfc2373.txt
75 * This supports embedded IPv4 addresses as well but does not strictly check
76 * for the right prefix (::0:<v4> or ::FFFF:<v4>) because there are too many
77 * ways to correctly represent the zero bytes. It's up to the user to check
78 * for valid addresses. */
79 HEX16 ([0-9A-Fa-f]{1,4})
80 V6_PART ({HEX16}:{HEX16}|{IPV4_ADDR})
81 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})?::
82 IPV6_ADDR ({IPV6_BASE})|(\[{IPV6_BASE}\](:{PORT})?)
86 {COMMENT} {/* ignore */}
88 \\{EOL} {/* continue line */}
92 "<" {return (OPENBRAC);}
93 ">" {return (CLOSEBRAC);}
94 {BOOL_TRUE} {yylval.boolean = 1; return (BTRUE);}
95 {BOOL_FALSE} {yylval.boolean = 0; return (BFALSE);}
97 {IPV4_ADDR} {yylval.string = yytext; return (UNQUOTED_STRING);}
98 {IPV6_ADDR} {yylval.string = yytext; return (UNQUOTED_STRING);}
100 {NUMBER} {yylval.number = strtod (yytext, NULL); return (NUMBER);}
102 \"{QUOTED_STRING}\" {yylval.string = yytext; return (QUOTED_STRING);}
103 {UNQUOTED_STRING} {yylval.string = yytext; return (UNQUOTED_STRING);}
105 \"{QUOTED_STRING}\\{EOL} {
106 int len = strlen (yytext);
110 /* remove "\\<EOL>" */
111 if ('\r' == yytext[len - 2])
120 <ML>^{WHITE_SPACE}+ {/* remove leading white-space */}
121 <ML>{NON_WHITE_SPACE}{QUOTED_STRING}\\{EOL} {
122 int len = strlen (yytext);
124 /* remove "\\<EOL>" */
125 if ('\r' == yytext[len - 2])
133 <ML>{NON_WHITE_SPACE}{QUOTED_STRING}\" {
135 yylval.string = ml_buffer;
138 return (QUOTED_STRING);
141 static void ml_append (char *string)
143 int len = strlen (string);
146 if (ml_free <= len) {
147 ml_len += len - ml_free + 1;
148 ml_buffer = (char *)realloc (ml_buffer, ml_len);
149 if (NULL == ml_buffer)
150 YY_FATAL_ERROR ("out of dynamic memory in ml_append");
153 s = snprintf (ml_buffer + ml_pos, ml_free, "%s", string);
154 if ((0 > s) || (ml_free <= s))
155 YY_FATAL_ERROR ("failed to write to multiline buffer");