b6d757eb39721fabf2c99752f8fba721fa16000a
1 /**
2 * collectd - src/liboconfig/scanner.l
3 * Copyright (C) 2007 Florian Forster
4 * Copyright (C) 2008 Sebastian Harl
5 *
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:
12 *
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
15 *
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.
23 *
24 * Authors:
25 * Florian Forster <octo at collectd.org>
26 * Sebastian Harl <sh at tokkee.org>
27 */
29 %{
30 #include <stdlib.h>
31 #include "oconfig.h"
32 #include "aux_types.h"
33 #include "parser.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 *);
44 #ifdef yyterminate
45 # undef yyterminate
46 #endif
47 #define yyterminate() \
48 do { free (ml_buffer); ml_buffer = NULL; ml_pos = 0; ml_len = 0; \
49 return YY_NULL; } while (0)
50 %}
51 %option yylineno
52 %option noyywrap
53 %x ML
54 WHITE_SPACE [\ \t\b]
55 NON_WHITE_SPACE [^\ \t\b]
56 EOL (\r\n|\n)
57 QUOTED_STRING ([^\\"]+|\\.)*
58 UNQUOTED_STRING [0-9A-Za-z_]+
59 HEX_NUMBER 0[xX][0-9a-fA-F]+
60 OCT_NUMBER 0[0-7]+
61 DEC_NUMBER [\+\-]?[0-9]+
62 FLOAT_NUMBER [\+\-]?[0-9]*\.[0-9]+([eE][\+\-][0-9]+)?
63 NUMBER ({FLOAT_NUMBER}|{HEX_NUMBER}|{OCT_NUMBER}|{DEC_NUMBER})
64 BOOL_TRUE (true|yes|on)
65 BOOL_FALSE (false|no|off)
66 COMMENT #.*
67 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]?)
68 IP_BYTE (2(5[0-5]|[0-4][0-9])|1[0-9][0-9]|[1-9]?[0-9])
69 IPV4_ADDR {IP_BYTE}\.{IP_BYTE}\.{IP_BYTE}\.{IP_BYTE}(:{PORT})?
71 %%
72 {WHITE_SPACE} |
73 {COMMENT} {/* ignore */}
75 \\{EOL} {/* continue line */}
77 {EOL} {return (EOL);}
78 "/" {return (SLASH);}
79 "<" {return (OPENBRAC);}
80 ">" {return (CLOSEBRAC);}
81 {BOOL_TRUE} {yylval.boolean = 1; return (BTRUE);}
82 {BOOL_FALSE} {yylval.boolean = 0; return (BFALSE);}
84 {IPV4_ADDR} {yylval.string = yytext; return (UNQUOTED_STRING);}
86 {NUMBER} {yylval.number = strtod (yytext, NULL); return (NUMBER);}
88 \"{QUOTED_STRING}\" {yylval.string = yytext; return (QUOTED_STRING);}
89 {UNQUOTED_STRING} {yylval.string = yytext; return (UNQUOTED_STRING);}
91 \"{QUOTED_STRING}\\{EOL} {
92 int len = strlen (yytext);
94 ml_pos = 0;
96 /* remove "\\<EOL>" */
97 if ('\r' == yytext[len - 2])
98 len -= 3;
99 else
100 len -= 2;
101 yytext[len] = '\0';
103 ml_append (yytext);
104 BEGIN (ML);
105 }
106 <ML>^{WHITE_SPACE}+ {/* remove leading white-space */}
107 <ML>{NON_WHITE_SPACE}{QUOTED_STRING}\\{EOL} {
108 int len = strlen (yytext);
110 /* remove "\\<EOL>" */
111 if ('\r' == yytext[len - 2])
112 len -= 3;
113 else
114 len -= 2;
115 yytext[len] = '\0';
117 ml_append(yytext);
118 }
119 <ML>{NON_WHITE_SPACE}{QUOTED_STRING}\" {
120 ml_append(yytext);
121 yylval.string = ml_buffer;
123 BEGIN (INITIAL);
124 return (QUOTED_STRING);
125 }
126 %%
127 static void ml_append (char *string)
128 {
129 int len = strlen (string);
130 int s;
132 if (ml_free <= len) {
133 ml_len += len - ml_free + 1;
134 ml_buffer = (char *)realloc (ml_buffer, ml_len);
135 if (NULL == ml_buffer)
136 YY_FATAL_ERROR ("out of dynamic memory in ml_append");
137 }
139 s = snprintf (ml_buffer + ml_pos, ml_free, "%s", string);
140 if ((0 > s) || (ml_free <= s))
141 YY_FATAL_ERROR ("failed to write to multiline buffer");
143 ml_pos += s;
144 return;
145 } /* ml_append */