1 files changed, 71 insertions, 0 deletions
diff --git a/src/lib-old-stats/stats.h b/src/lib-old-stats/stats.h
new file mode 100644
index 0000000..0cd0dc3
--- /dev/null
+++ b/src/lib-old-stats/stats.h
@@ -0,0 +1,71 @@
+#ifndef STATS_H
+#define STATS_H
+
+struct stats;
+struct stats_item;
+
+struct stats_vfuncs {
+	const char *short_name;
+
+	size_t (*alloc_size)(void);
+	unsigned int (*field_count)(void);
+	const char *(*field_name)(unsigned int n);
+	void (*field_value)(string_t *str, const struct stats *stats,
+			    unsigned int n);
+
+	bool (*diff)(const struct stats *stats1, const struct stats *stats2,
+		     struct stats *diff_stats_r, const char **error_r);
+	void (*add)(struct stats *dest, const struct stats *src);
+	bool (*have_changed)(const struct stats *prev, const struct stats *cur);
+
+	void (*export)(buffer_t *buf, const struct stats *stats);
+	bool (*import)(const unsigned char *data, size_t size, size_t *pos_r,
+		       struct stats *stats, const char **error_r);
+};
+
+struct stats_item *stats_register(const struct stats_vfuncs *vfuncs);
+void stats_unregister(struct stats_item **item);
+
+/* Allocate struct stats from a given pool. */
+struct stats *stats_alloc(pool_t pool);
+/* Returns the number of bytes allocated to stats. */
+size_t stats_alloc_size(void);
+/* Copy all stats from src to dest. */
+void stats_copy(struct stats *dest, const struct stats *src);
+
+/* Returns the number of stats fields. */
+unsigned int stats_field_count(void);
+/* Returns the name of a stats field (exported to doveadm). */
+const char *stats_field_name(unsigned int n);
+/* Returns the value of a stats field as a string (exported to doveadm). */
+void stats_field_value(string_t *str, const struct stats *stats,
+		       unsigned int n);
+
+/* Return diff_stats_r->field = stats2->field - stats1->field.
+   diff1 is supposed to have smaller values than diff2. Returns TRUE if this
+   is so, FALSE if not */
+bool stats_diff(const struct stats *stats1, const struct stats *stats2,
+		struct stats *diff_stats_r, const char **error_r);
+/* dest->field += src->field */
+void stats_add(struct stats *dest, const struct stats *src);
+/* Returns TRUE if any fields have changed in cur since prev in a way that
+   a plugin should send the updated statistics to the stats process. Not all
+   fields necessarily require sending an update. */
+bool stats_have_changed(const struct stats *prev, const struct stats *cur);
+
+/* Export stats into a buffer in binary format. */
+void stats_export(buffer_t *buf, const struct stats *stats);
+/* Import stats from a buffer. The buffer doesn't need to contain an update to
+   all the stats items - old_stats are used for that item in such case.
+   Currently it's not allowed to have unknown items in the buffer. */
+bool stats_import(const unsigned char *data, size_t size,
+		  const struct stats *old_stats, struct stats *stats,
+		  const char **error_r);
+/* Return a pointer to stats where the specified item starts. The returned
+   pointer can be used to fill up the item-specific stats (up to its
+   alloc_size() number of bytes). */
+void *stats_fill_ptr(struct stats *stats, struct stats_item *item);
+
+void stats_reset(struct stats *stats);
+
+#endif