xref: /openbsd-src/usr.bin/tmux/cmd-set-buffer.c (revision ca6784669ed926e64c92bbcc7839f5934b2c6817)
1 /* $OpenBSD: cmd-set-buffer.c,v 1.17 2014/04/24 09:14:43 nicm Exp $ */
2 
3 /*
4  * Copyright (c) 2007 Nicholas Marriott <nicm@users.sourceforge.net>
5  *
6  * Permission to use, copy, modify, and distribute this software for any
7  * purpose with or without fee is hereby granted, provided that the above
8  * copyright notice and this permission notice appear in all copies.
9  *
10  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14  * WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
15  * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
16  * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17  */
18 
19 #include <sys/types.h>
20 
21 #include <stdlib.h>
22 #include <string.h>
23 
24 #include "tmux.h"
25 
26 /*
27  * Add, set, or append to a paste buffer.
28  */
29 
30 enum cmd_retval	 cmd_set_buffer_exec(struct cmd *, struct cmd_q *);
31 
32 const struct cmd_entry cmd_set_buffer_entry = {
33 	"set-buffer", "setb",
34 	"ab:", 1, 1,
35 	"[-a] " CMD_BUFFER_USAGE " data",
36 	0,
37 	NULL,
38 	cmd_set_buffer_exec
39 };
40 
41 enum cmd_retval
42 cmd_set_buffer_exec(struct cmd *self, struct cmd_q *cmdq)
43 {
44 	struct args		*args = self->args;
45 	struct paste_buffer	*pb;
46 	u_int			 limit;
47 	char			*pdata, *cause;
48 	size_t			 psize, newsize;
49 	int			 buffer;
50 
51 	limit = options_get_number(&global_options, "buffer-limit");
52 
53 	psize = 0;
54 	pdata = NULL;
55 
56 	pb = NULL;
57 	buffer = -1;
58 
59 	if ((newsize = strlen(args->argv[0])) == 0)
60 		return (CMD_RETURN_NORMAL);
61 
62 	if (args_has(args, 'b')) {
63 		buffer = args_strtonum(args, 'b', 0, INT_MAX, &cause);
64 		if (cause != NULL) {
65 			cmdq_error(cmdq, "buffer %s", cause);
66 			free(cause);
67 			return (CMD_RETURN_ERROR);
68 		}
69 		pb = paste_get_index(buffer);
70 		if (pb == NULL) {
71 			cmdq_error(cmdq, "no buffer %d", buffer);
72 			return (CMD_RETURN_ERROR);
73 		}
74 	} else if (args_has(args, 'a')) {
75 		pb = paste_get_top();
76 		if (pb != NULL)
77 			buffer = 0;
78 	}
79 
80 	if (args_has(args, 'a') && pb != NULL) {
81 		psize = pb->size;
82 		pdata = xmalloc(psize);
83 		memcpy(pdata, pb->data, psize);
84 	}
85 
86 	pdata = xrealloc(pdata, 1, psize + newsize);
87 	memcpy(pdata + psize, args->argv[0], newsize);
88 	psize += newsize;
89 
90 	if (buffer == -1)
91 		paste_add(pdata, psize, limit);
92 	else
93 		paste_replace(buffer, pdata, psize);
94 
95 	return (CMD_RETURN_NORMAL);
96 }
97