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>
33 #include "aux_types.h"
37 #pragma clang diagnostic push
38 #pragma clang diagnostic ignored "-Wmissing-noreturn"
41 #pragma GCC diagnostic push
42 #pragma GCC diagnostic ignored "-Wsign-compare"
44 /* multiline string buffer */
45 static char *ml_buffer = NULL;
46 static int ml_pos = 0;
47 static int ml_len = 0;
49 #define ml_free (ml_len - ml_pos)
51 static void ml_append (char *);
56 #define yyterminate() \
57 do { free (ml_buffer); ml_buffer = NULL; ml_pos = 0; ml_len = 0; \
58 return YY_NULL; } while (0)
66 NON_WHITE_SPACE [^\ \t\b]
68 QUOTED_STRING ([^\\"]+|\\.)*
69 UNQUOTED_STRING [0-9A-Za-z_]+
70 HEX_NUMBER 0[xX][0-9a-fA-F]+
72 DEC_NUMBER [\+\-]?[0-9]+
73 FLOAT_NUMBER [\+\-]?[0-9]*\.[0-9]+([eE][\+\-][0-9]+)?
74 NUMBER ({FLOAT_NUMBER}|{HEX_NUMBER}|{OCT_NUMBER}|{DEC_NUMBER})
75 BOOL_TRUE (true|yes|on)
76 BOOL_FALSE (false|no|off)
78 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]?)
80 IP_BYTE (2(5[0-5]|[0-4][0-9])|1[0-9][0-9]|[1-9]?[0-9])
81 IPV4_ADDR {IP_BYTE}\.{IP_BYTE}\.{IP_BYTE}\.{IP_BYTE}(:{PORT})?
83 /* IPv6 address according to http://www.ietf.org/rfc/rfc2373.txt
84 * This supports embedded IPv4 addresses as well but does not strictly check
85 * for the right prefix (::0:<v4> or ::FFFF:<v4>) because there are too many
86 * ways to correctly represent the zero bytes. It's up to the user to check
87 * for valid addresses. */
88 HEX16 ([0-9A-Fa-f]{1,4})
89 V6_PART ({HEX16}:{HEX16}|{IPV4_ADDR})
90 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})?::
91 IPV6_ADDR ({IPV6_BASE})|(\[{IPV6_BASE}\](:{PORT})?)
95 {COMMENT} {/* ignore */}
97 \\{EOL} {/* continue line */}
100 "/" {return (SLASH);}
101 "<" {return (OPENBRAC);}
102 ">" {return (CLOSEBRAC);}
103 {BOOL_TRUE} {yylval.boolean = 1; return (BTRUE);}
104 {BOOL_FALSE} {yylval.boolean = 0; return (BFALSE);}
106 {IPV4_ADDR} {yylval.string = yytext; return (UNQUOTED_STRING);}
107 {IPV6_ADDR} {yylval.string = yytext; return (UNQUOTED_STRING);}
109 {NUMBER} {yylval.number = strtod (yytext, NULL); return (NUMBER);}
111 \"{QUOTED_STRING}\" {yylval.string = yytext; return (QUOTED_STRING);}
112 {UNQUOTED_STRING} {yylval.string = yytext; return (UNQUOTED_STRING);}
114 \"{QUOTED_STRING}\\{EOL} {
115 int len = strlen (yytext);
119 /* remove "\\<EOL>" */
120 if ('\r' == yytext[len - 2])
129 <ML>^{WHITE_SPACE}+ {/* remove leading white-space */}
130 <ML>{NON_WHITE_SPACE}{QUOTED_STRING}\\{EOL} {
131 int len = strlen (yytext);
133 /* remove "\\<EOL>" */
134 if ('\r' == yytext[len - 2])
142 <ML>{NON_WHITE_SPACE}{QUOTED_STRING}\" {
144 yylval.string = ml_buffer;
147 return (QUOTED_STRING);
150 static void ml_append (char *string)
152 int len = strlen (string);
155 if (ml_free <= len) {
156 ml_len += len - ml_free + 1;
157 ml_buffer = realloc (ml_buffer, ml_len);
158 if (NULL == ml_buffer)
159 YY_FATAL_ERROR ("out of dynamic memory in ml_append");
162 s = snprintf (ml_buffer + ml_pos, ml_free, "%s", string);
163 if ((0 > s) || (ml_free <= s))
164 YY_FATAL_ERROR ("failed to write to multiline buffer");
171 #pragma clang diagnostic pop
174 #pragma GCC diagnostic pop