keyword: Add `get_keyword_cb`, and add `get_callback` to `struct keyword`

This will be used for creating a getter callback for keywords.

I also renamed `keyword_cb` to `set_keyword_cb`, aswell as renamed
`callback` to `set_callback` in `struct keyword`.

1 files changed, 9 insertions, 7 deletions

diff --git a/keyword.h b/keyword.h
index 5fccbc4..c39f13c 100644
--- a/keyword.h
+++ b/keyword.h
@@ -6,7 +6,8 @@
 typedef enum keyword_type keyword_type;
 typedef struct keyword keyword;
 typedef union keyword_val keyword_val;
-typedef int (keyword_cb)(void *ctx, void *ret, const keyword *key, keyword_val val);
+typedef int (set_keyword_cb)(void *ctx, void *ret, const keyword *key, keyword_val val);
+typedef int (get_keyword_cb)(void *ctx, void *data, const keyword *key, keyword_val *val);
 typedef int (parse_callback)(void **ret, void *ctx, char *buf);
 
 enum keyword_type {
@@ -20,12 +21,13 @@ enum keyword_type {
 };
 
 struct keyword {
-	const char *key;	/* Keyword. */
-	const char *desc;	/* Description of the keyword. */
-	const char *time_fmt;	/* Format string used to parse a timestamp (if needed). */
-	keyword_type type;	/* Datatype of the keyword. */
-	size_t *offsets;	/* Offset(s) of member(s) in a struct (if needed). */
-	keyword_cb *callback;	/* Callback to keyword specific parsing function (if needed). */
+	const char *key;		/* Keyword. */
+	const char *desc;		/* Description of the keyword. */
+	const char *time_fmt;		/* Format string used to parse a timestamp (if needed). */
+	keyword_type type;		/* Datatype of the keyword. */
+	size_t *offsets;		/* Offset(s) of member(s) in a struct (if needed). */
+	set_keyword_cb *set_callback;	/* Callback to keyword specific setter function (if needed). */
+	get_keyword_cb *get_callback;	/* Callback to keyword specific getter function (if needed). */
 };
 
 union keyword_val {