X-Git-Url: https://jfr.im/git/solanum.git/blobdiff_plain/a8e69f5dfc00f8b046aafd92eedc4ae0c3ae2f6f..9d65d599c41fcf70bf060debeb4b0e5545efc8fe:/include/msgbuf.h

diff --git a/include/msgbuf.h b/include/msgbuf.h
index 2771e0a0..9bc34bf7 100644
--- a/include/msgbuf.h
+++ b/include/msgbuf.h
@@ -26,20 +26,48 @@
 
 /* a key-value structure for each message tag. */
 struct MsgTag {
-	const char *key;
-	const char *value;
+	const char *key;		/* the key of the tag (must be set) */
+	const char *value;		/* the value of the tag or NULL */
+	unsigned int capmask;		/* the capability mask this tag belongs to (used only when sending) */
 };
 
 struct MsgBuf {
-	size_t n_tags;
-	struct MsgTag tags[MAXPARA];
+	size_t n_tags;			/* the number of tags in the MsgBuf */
+	struct MsgTag tags[MAXPARA];	/* the tags themselves, upto MAXPARA tags available */
 
-	const char *origin;
-	const char *cmd;
+	const char *origin;		/* the origin of the message (or NULL) */
+	const char *target;		/* the target of the message (either NULL, or custom defined) */
+	const char *cmd;		/* the cmd/verb of the message (either NULL, or para[0]) */
 
-	size_t parselen;
-	size_t n_para;
-	const char *para[MAXPARA];
+	size_t n_para;			/* the number of parameters (always at least 1 if a full message) */
+	const char *para[MAXPARA];	/* parameters vector (starting with cmd as para[0]) */
+};
+
+struct MsgBuf_str_data {
+	const struct MsgBuf *msgbuf;
+	unsigned int caps;
+};
+
+#define MSGBUF_CACHE_SIZE 32
+
+struct MsgBuf_cache_entry {
+	unsigned int caps;
+	buf_head_t linebuf;
+	struct MsgBuf_cache_entry *next;
+};
+
+struct MsgBuf_cache {
+	const struct MsgBuf *msgbuf;
+	char message[DATALEN + 1];
+	unsigned int overall_capmask;
+
+	/* Fixed maximum size linked list, new entries are allocated at the end
+	 * of the array but are accessed through the "next" pointers.
+	 *
+	 * This does not use rb dlink to avoid unnecessary individual allocations.
+	 */
+	struct MsgBuf_cache_entry entry[MSGBUF_CACHE_SIZE];
+	struct MsgBuf_cache_entry *head; /* LRU cache head */
 };
 
 /*
@@ -54,7 +82,7 @@ int msgbuf_parse(struct MsgBuf *msgbuf, char *line);
  * cmd may not be NULL.
  * returns 0 on success, 1 on error.
  */
-int msgbuf_unparse(char *buf, struct MsgBuf *msgbuf);
+int msgbuf_unparse(char *buf, size_t buflen, const struct MsgBuf *msgbuf, unsigned int capmask);
 
 /*
  * unparse a MsgBuf header plus payload into a buffer.
@@ -62,30 +90,32 @@ int msgbuf_unparse(char *buf, struct MsgBuf *msgbuf);
  * cmd may not be NULL.
  * returns 0 on success, 1 on error.
  */
-int msgbuf_unparse_fmt(char *buf, struct MsgBuf *head, const char *fmt, ...) AFP(3, 4);
-int msgbuf_vunparse_fmt(char *buf, struct MsgBuf *head, const char *fmt, va_list va);
+int msgbuf_unparse_fmt(char *buf, size_t buflen, const struct MsgBuf *head, unsigned int capmask, const char *fmt, ...) AFP(5, 6);
+int msgbuf_vunparse_fmt(char *buf, size_t buflen, const struct MsgBuf *head, unsigned int capmask, const char *fmt, va_list va);
 
-static inline void
-msgbuf_init(struct MsgBuf *msgbuf)
-{
-	msgbuf->n_tags = msgbuf->n_para = msgbuf->parselen = 0;
-	msgbuf->origin = NULL;
-	msgbuf->cmd = NULL;
-}
+int msgbuf_unparse_linebuf_tags(char *buf, size_t buflen, void *data);
+int msgbuf_unparse_prefix(char *buf, size_t *buflen, const struct MsgBuf *msgbuf, unsigned int capmask);
+
+void msgbuf_cache_init(struct MsgBuf_cache *cache, const struct MsgBuf *msgbuf, const rb_strf_t *message);
+void msgbuf_cache_initf(struct MsgBuf_cache *cache, const struct MsgBuf *msgbuf, const rb_strf_t *message, const char *format, ...) AFP(4, 5);
+buf_head_t *msgbuf_cache_get(struct MsgBuf_cache *cache, unsigned int caps);
+void msgbuf_cache_free(struct MsgBuf_cache *cache);
 
 static inline void
-msgbuf_append_tag(struct MsgBuf *msgbuf, const char *key, const char *value)
+msgbuf_init(struct MsgBuf *msgbuf)
 {
-	msgbuf->tags[msgbuf->n_tags].key = key;
-	msgbuf->tags[msgbuf->n_tags].value = value;
-	msgbuf->n_tags++;
+	memset(msgbuf, 0, sizeof(*msgbuf));
 }
 
 static inline void
-msgbuf_append_para(struct MsgBuf *msgbuf, const char *para)
+msgbuf_append_tag(struct MsgBuf *msgbuf, const char *key, const char *value, unsigned int capmask)
 {
-	msgbuf->para[msgbuf->n_para] = para;
-	msgbuf->n_para++;
+	if (msgbuf->n_tags < MAXPARA) {
+		msgbuf->tags[msgbuf->n_tags].key = key;
+		msgbuf->tags[msgbuf->n_tags].value = value;
+		msgbuf->tags[msgbuf->n_tags].capmask = capmask;
+		msgbuf->n_tags++;
+	}
 }
 
 #endif