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>
31 #include "gnulib_config.h"
38 #include "aux_types.h"
42 #pragma clang diagnostic push
43 #pragma clang diagnostic ignored "-Wmissing-noreturn"
47 /* multiline string buffer */
48 static char *ml_buffer;
52 #define ml_free (ml_len - ml_pos)
54 static void ml_append (char *);
59 #define yyterminate() \
60 do { free (ml_buffer); ml_buffer = NULL; ml_pos = 0; ml_len = 0; \
61 return YY_NULL; } while (0)
69 NON_WHITE_SPACE [^\ \t\b]
71 QUOTED_STRING ([^\\"]+|\\.)*
72 UNQUOTED_STRING [0-9A-Za-z_]+
73 HEX_NUMBER 0[xX][0-9a-fA-F]+
75 DEC_NUMBER [\+\-]?[0-9]+
76 FLOAT_NUMBER [\+\-]?[0-9]*\.[0-9]+([eE][\+\-][0-9]+)?
77 NUMBER ({FLOAT_NUMBER}|{HEX_NUMBER}|{OCT_NUMBER}|{DEC_NUMBER})
78 BOOL_TRUE (true|yes|on)
79 BOOL_FALSE (false|no|off)
81 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]?)
83 IP_BYTE (2(5[0-5]|[0-4][0-9])|1[0-9][0-9]|[1-9]?[0-9])
84 IPV4_ADDR {IP_BYTE}\.{IP_BYTE}\.{IP_BYTE}\.{IP_BYTE}(:{PORT})?
86 /* IPv6 address according to http://www.ietf.org/rfc/rfc2373.txt
87 * This supports embedded IPv4 addresses as well but does not strictly check
88 * for the right prefix (::0:<v4> or ::FFFF:<v4>) because there are too many
89 * ways to correctly represent the zero bytes. It's up to the user to check
90 * for valid addresses. */
91 HEX16 ([0-9A-Fa-f]{1,4})
92 V6_PART ({HEX16}:{HEX16}|{IPV4_ADDR})
93 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})?::
94 IPV6_ADDR ({IPV6_BASE})|(\[{IPV6_BASE}\](:{PORT})?)
98 {COMMENT} {/* ignore */}
100 \\{EOL} {/* continue line */}
102 {EOL} {return (EOL);}
103 "/" {return (SLASH);}
104 "<" {return (OPENBRAC);}
105 ">" {return (CLOSEBRAC);}
106 {BOOL_TRUE} {yylval.boolean = 1; return (BTRUE);}
107 {BOOL_FALSE} {yylval.boolean = 0; return (BFALSE);}
109 {IPV4_ADDR} {yylval.string = yytext; return (UNQUOTED_STRING);}
110 {IPV6_ADDR} {yylval.string = yytext; return (UNQUOTED_STRING);}
112 {NUMBER} {yylval.number = strtod (yytext, NULL); return (NUMBER);}
114 \"{QUOTED_STRING}\" {yylval.string = yytext; return (QUOTED_STRING);}
115 {UNQUOTED_STRING} {yylval.string = yytext; return (UNQUOTED_STRING);}
117 \"{QUOTED_STRING}\\{EOL} {
118 size_t len = strlen (yytext);
122 /* remove "\\<EOL>" */
123 if (yytext[len - 2] == '\r')
132 <ML>^{WHITE_SPACE}+ {/* remove leading white-space */}
133 <ML>{NON_WHITE_SPACE}{QUOTED_STRING}\\{EOL} {
134 size_t len = strlen (yytext);
136 /* remove "\\<EOL>" */
137 if (yytext[len - 2] == '\r')
145 <ML>{NON_WHITE_SPACE}{QUOTED_STRING}\" {
147 yylval.string = ml_buffer;
150 return (QUOTED_STRING);
153 static void ml_append (char *string)
155 size_t len = strlen (string);
157 if (ml_free <= len) {
158 ml_len += len - ml_free + 1;
159 ml_buffer = realloc (ml_buffer, ml_len);
160 if (ml_buffer == NULL)
161 YY_FATAL_ERROR ("out of dynamic memory in ml_append");
164 int s = snprintf(ml_buffer + ml_pos, ml_free, "%s", string);
165 if (s < 0 || (size_t)s >= ml_free)
166 YY_FATAL_ERROR ("failed to write to multiline buffer");
173 #pragma clang diagnostic pop