/* $Id: cmd-list.c,v 1.2 2009-01-19 18:23:40 nicm Exp $ */

/*
 * Copyright (c) 2009 Nicholas Marriott <nicm@users.sourceforge.net>
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
 * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
 * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

#include <sys/types.h>

#include <string.h>

#include "tmux.h"

struct cmd_list *
cmd_list_parse(int argc, char **argv, char **cause)
{
	struct cmd_list	*cmdlist;
	struct cmd	*cmd;
	int		 i, lastsplit;

	cmdlist = xmalloc(sizeof *cmdlist);
	TAILQ_INIT(cmdlist);

	lastsplit = 0;
	for (i = 0; i < argc; i++) {
		if (strcmp(argv[i], "\\;") == 0) {
			argv[i][0] = ';';
			argv[i][1] = '\0';
		} else if (strcmp(argv[i], ";") == 0) {
			cmd = cmd_parse(i - lastsplit, argv + lastsplit, cause);
			if (cmd == NULL)
				goto bad;
			TAILQ_INSERT_TAIL(cmdlist, cmd, qentry);
			lastsplit = i + 1;
		}
	}

	cmd = cmd_parse(argc - lastsplit, argv + lastsplit, cause);
	if (cmd == NULL) {
		cmd_list_free(cmdlist);
		return (NULL);
	}
	TAILQ_INSERT_TAIL(cmdlist, cmd, qentry);
       
	return (cmdlist);

bad:
	cmd_list_free(cmdlist);
	return (NULL);
}

int
cmd_list_exec(struct cmd_list *cmdlist, struct cmd_ctx *ctx)
{
	struct cmd	*cmd;
	int		 n;

	TAILQ_FOREACH(cmd, cmdlist, qentry) {
		if ((n = cmd_exec(cmd, ctx)) != 0)
			return (n);
	}
	return (0);
}

void
cmd_list_send(struct cmd_list *cmdlist, struct buffer *b)
{
	struct cmd	*cmd;
	u_int		 n;

	n = 0;
	TAILQ_FOREACH(cmd, cmdlist, qentry)
	    	n++;

	buffer_write(b, &n, sizeof n);
	TAILQ_FOREACH(cmd, cmdlist, qentry)
	    	cmd_send(cmd, b);
}

struct cmd_list *
cmd_list_recv(struct buffer *b)
{
	struct cmd_list	*cmdlist;
	struct cmd	*cmd;
	u_int		 n;

	buffer_read(b, &n, sizeof n);

	cmdlist = xmalloc(sizeof *cmdlist);
	TAILQ_INIT(cmdlist);

	while (n-- > 0) {
		cmd = cmd_recv(b);
		TAILQ_INSERT_TAIL(cmdlist, cmd, qentry);
	}

	return (cmdlist);
}

void
cmd_list_free(struct cmd_list *cmdlist)
{
	struct cmd	*cmd;
	
	while (!TAILQ_EMPTY(cmdlist)) {
		cmd = TAILQ_FIRST(cmdlist);
		TAILQ_REMOVE(cmdlist, cmd, qentry);
		cmd_free(cmd);
	}
	xfree(cmdlist);
}

size_t
cmd_list_print(struct cmd_list *cmdlist, char *buf, size_t len)
{
	struct cmd	*cmd;
	size_t		 off;

	off = 0;
	TAILQ_FOREACH(cmd, cmdlist, qentry) {
		if (off >= len)
			break;
		off += cmd_print(cmd, buf + off, len - off);
		if (off >= len)
			break;
		if (TAILQ_NEXT(cmd, qentry) != NULL)
			off += xsnprintf(buf + off, len - off, " ; ");
	}
	return (off);
}