1 /* vi: set sw=4 ts=4: */
2 /*
3  * config file parser helper
4  *
5  * Copyright (C) 2008 by Vladimir Dronnikov <dronnikov@gmail.com>
6  *
7  * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
8  * Also for use in uClibc (http://uclibc.org/) licensed under LGPLv2.1 or later.
9  */
10 #ifndef __INTERNAL_PARSE_CONFIG_H
11 #define __INTERNAL_PARSE_CONFIG_H
12 
13 #include <stdio.h>
14 #ifndef FAST_FUNC
15 # define FAST_FUNC
16 #endif
17 
18 /*
19  * Config file parser
20  */
21 enum {
22 	PARSE_COLLAPSE  = 0x00010000, /* treat consecutive delimiters as one */
23 	PARSE_TRIM      = 0x00020000, /* trim leading and trailing delimiters */
24 /* TODO: COLLAPSE and TRIM seem to always go in pair */
25 	PARSE_GREEDY    = 0x00040000, /* last token takes entire remainder of the line */
26 	PARSE_MIN_DIE   = 0x00100000, /* die if < min tokens found */
27 	/* keep a copy of current line */
28 	PARSE_KEEP_COPY = 0x00200000 * 0, /*ENABLE_FEATURE_CROND_D, */
29 /*	PARSE_ESCAPE    = 0x00400000,*/ /* process escape sequences in tokens */
30 	/* NORMAL is:
31 	   * remove leading and trailing delimiters and collapse
32 	     multiple delimiters into one
33 	   * warn and continue if less than mintokens delimiters found
34 	   * grab everything into last token
35 	 */
36 	PARSE_NORMAL    = PARSE_COLLAPSE | PARSE_TRIM | PARSE_GREEDY,
37 };
38 
39 typedef struct parser_t {
40 	FILE *fp; /* input file */
41 	char *data; /* pointer to data */
42 	size_t data_len; /* offset into data of begin of line */
43 	char *line; /* pointer to beginning of line */
44 	size_t line_len; /* length of line */
45 	smalluint allocated;
46 } parser_t;
47 
48 parser_t* config_open(const char *filename) FAST_FUNC attribute_hidden;
49 libc_hidden_proto(config_open)
50 int config_read(parser_t *parser, char ***tokens, unsigned flags, const char *delims) FAST_FUNC attribute_hidden;
51 libc_hidden_proto(config_read)
52 #define config_read(parser, tokens, max, min, str, flags) \
53 	config_read(parser, tokens, ((flags) | (((min) & 0xFF) << 8) | ((max) & 0xFF)), str)
54 void config_close(parser_t *parser) FAST_FUNC attribute_hidden;
55 libc_hidden_proto(config_close)
56 
57 #endif /* __INTERNAL_PARSE_CONFIG_H */
58