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construct/include/msgbuf.h
2016-02-20 17:59:00 -06:00

100 lines
3.5 KiB
C

/*
* charybdis - an advanced ircd.
* Copyright (c) 2016 William Pitcock <nenolod@dereferenced.org>.
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice is present in all copies.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include "s_assert.h"
#ifndef CHARYBDIS__MSGBUF_H
#define CHARYBDIS__MSGBUF_H
#define MAXPARA (15)
/* a key-value structure for each message tag. */
struct MsgTag {
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; /* the number of tags in the MsgBuf */
struct MsgTag tags[MAXPARA]; /* the tags themselves, upto MAXPARA tags available */
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; /* the length of the message */
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]) */
};
/*
* parse a message into a MsgBuf.
* returns 0 on success, 1 on error.
*/
int msgbuf_parse(struct MsgBuf *msgbuf, char *line);
/*
* unparse a pure MsgBuf into a buffer.
* if origin is NULL, me.name will be used.
* cmd may not be NULL.
* returns 0 on success, 1 on error.
*/
int msgbuf_unparse(char *buf, size_t buflen, struct MsgBuf *msgbuf, unsigned int capmask);
/*
* unparse a MsgBuf header plus payload into a buffer.
* if origin is NULL, me.name will be used.
* cmd may not be NULL.
* returns 0 on success, 1 on error.
*/
int msgbuf_unparse_fmt(char *buf, size_t buflen, struct MsgBuf *head, unsigned int capmask, const char *fmt, ...) AFP(5, 6);
int msgbuf_vunparse_fmt(char *buf, size_t buflen, struct MsgBuf *head, unsigned int capmask, const char *fmt, va_list va);
void msgbuf_unparse_prefix(char *buf, size_t buflen, struct MsgBuf *msgbuf, unsigned int capmask);
static inline void
msgbuf_init(struct MsgBuf *msgbuf)
{
memset(msgbuf, 0, sizeof(*msgbuf));
}
static inline void
msgbuf_append_tag(struct MsgBuf *msgbuf, const char *key, const char *value, unsigned int capmask)
{
s_assert(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++;
}
static inline void
msgbuf_append_para(struct MsgBuf *msgbuf, const char *para)
{
s_assert(msgbuf->n_para < MAXPARA);
msgbuf->para[msgbuf->n_para] = para;
msgbuf->n_para++;
}
#endif