2 * oconfig - src/scanner.l
3 * Copyright (C) 2007 Florian octo Forster <octo at verplant.org>
4 * Copyright (C) 2008 Sebastian tokkee Harl <sh at tokkee.org>
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License as published by the
8 * Free Software Foundation; only version 2 of the License is applicable.
10 * This program is distributed in the hope that it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
15 * You should have received a copy of the GNU General Public License along with
16 * this program; if not, write to the Free Software Foundation, Inc.,
17 * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
23 #include "aux_types.h"
26 /* multiline string buffer */
27 static char *ml_buffer = NULL;
28 static int ml_pos = 0;
29 static int ml_len = 0;
31 #define ml_free (ml_len - ml_pos)
33 static void ml_append (char *);
38 #define yyterminate() \
39 do { free (ml_buffer); ml_buffer = NULL; ml_pos = 0; ml_len = 0; \
40 return YY_NULL; } while (0)
48 NON_WHITE_SPACE [^\ \t\b]
50 QUOTED_STRING ([^\\"]+|\\.)*
51 UNQUOTED_STRING [0-9A-Za-z_]+
52 HEX_NUMBER 0[xX][0-9a-fA-F]+
54 DEC_NUMBER [\+\-]?[0-9]+
55 FLOAT_NUMBER [\+\-]?[0-9]*\.[0-9]+([eE][\+\-][0-9]+)?
56 NUMBER ({FLOAT_NUMBER}|{HEX_NUMBER}|{OCT_NUMBER}|{DEC_NUMBER})
57 BOOL_TRUE (true|yes|on)
58 BOOL_FALSE (false|no|off)
60 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]?)
61 IP_BYTE (2(5[0-5]|[0-4][0-9])|1[0-9][0-9]|[1-9]?[0-9])
62 IPV4_ADDR {IP_BYTE}\.{IP_BYTE}\.{IP_BYTE}\.{IP_BYTE}(:{PORT})?
66 {COMMENT} {/* ignore */}
68 \\{EOL} {/* continue line */}
72 "<" {return (OPENBRAC);}
73 ">" {return (CLOSEBRAC);}
74 {BOOL_TRUE} {yylval.boolean = 1; return (BTRUE);}
75 {BOOL_FALSE} {yylval.boolean = 0; return (BFALSE);}
77 {IPV4_ADDR} {yylval.string = yytext; return (UNQUOTED_STRING);}
79 {NUMBER} {yylval.number = strtod (yytext, NULL); return (NUMBER);}
81 \"{QUOTED_STRING}\" {yylval.string = yytext; return (QUOTED_STRING);}
82 {UNQUOTED_STRING} {yylval.string = yytext; return (UNQUOTED_STRING);}
84 \"{QUOTED_STRING}\\{EOL} {
85 int len = strlen (yytext);
89 /* remove "\\<EOL>" */
90 if ('\r' == yytext[len - 2])
99 <ML>^{WHITE_SPACE}+ {/* remove leading white-space */}
100 <ML>{NON_WHITE_SPACE}{QUOTED_STRING}\\{EOL} {
101 int len = strlen (yytext);
103 /* remove "\\<EOL>" */
104 if ('\r' == yytext[len - 2])
112 <ML>{NON_WHITE_SPACE}{QUOTED_STRING}\" {
114 yylval.string = ml_buffer;
117 return (QUOTED_STRING);
120 static void ml_append (char *string)
122 int len = strlen (string);
125 if (ml_free <= len) {
126 ml_len += len - ml_free + 1;
127 ml_buffer = (char *)realloc (ml_buffer, ml_len);
128 if (NULL == ml_buffer)
129 YY_FATAL_ERROR ("out of dynamic memory in ml_append");
132 s = snprintf (ml_buffer + ml_pos, ml_free, "%s", string);
133 if ((0 > s) || (ml_free <= s))
134 YY_FATAL_ERROR ("failed to write to multiline buffer");