1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
|
/*
* (C) Copyright 2012
* Joe Hershberger, National Instruments, joe.hershberger@ni.com
*
* SPDX-License-Identifier: GPL-2.0+
*/
#ifndef __ENV_ATTR_H__
#define __ENV_ATTR_H__
#define ENV_ATTR_LIST_DELIM ','
#define ENV_ATTR_SEP ':'
/*
* env_attr_walk takes as input an "attr_list" that takes the form:
* attributes = [^,:\s]*
* entry = name[:attributes]
* list = entry[,list]
* It will call the "callback" function with the "name" and "attributes"
* The callback may return a non-0 to abort the list walk.
* This return value will be passed through to the caller.
* 0 is returned on success.
*/
int env_attr_walk(const char *attr_list,
int (*callback)(const char *name, const char *attributes, void *priv),
void *priv);
/*
* env_attr_lookup takes as input an "attr_list" with the same form as above.
* It also takes as input a "name" to look for.
* If the name is found in the list, it's value is copied into "attributes".
* There is no protection on attributes being too small for the value.
* It returns -1 if attributes is NULL, 1 if "name" is not found, 2 if
* "attr_list" is NULL.
* Returns 0 on success.
*/
int env_attr_lookup(const char *attr_list, const char *name, char *attributes);
#endif /* __ENV_ATTR_H__ */
|
