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/* $OpenBSD: paste.c,v 1.7 2009/11/26 22:28:24 nicm Exp $ */
/*
* Copyright (c) 2007 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 <sys/time.h>
#include <string.h>
#include "tmux.h"
/*
* Stack of paste buffers. Note that paste buffer data is not necessarily a C
* string!
*/
void
paste_init_stack(struct paste_stack *ps)
{
ARRAY_INIT(ps);
}
void
paste_free_stack(struct paste_stack *ps)
{
while (paste_free_top(ps) == 0)
;
}
/* Return each item of the stack in turn. */
struct paste_buffer *
paste_walk_stack(struct paste_stack *ps, uint *idx)
{
struct paste_buffer *pb;
pb = paste_get_index(ps, *idx);
(*idx)++;
return (pb);
}
/* Get the top item on the stack. */
struct paste_buffer *
paste_get_top(struct paste_stack *ps)
{
if (ARRAY_LENGTH(ps) == 0)
return (NULL);
return (ARRAY_FIRST(ps));
}
/* Get an item by its index. */
struct paste_buffer *
paste_get_index(struct paste_stack *ps, u_int idx)
{
if (idx >= ARRAY_LENGTH(ps))
return (NULL);
return (ARRAY_ITEM(ps, idx));
}
/* Free the top item on the stack. */
int
paste_free_top(struct paste_stack *ps)
{
struct paste_buffer *pb;
if (ARRAY_LENGTH(ps) == 0)
return (-1);
pb = ARRAY_FIRST(ps);
ARRAY_REMOVE(ps, 0);
xfree(pb->data);
xfree(pb);
return (0);
}
/* Free an item by index. */
int
paste_free_index(struct paste_stack *ps, u_int idx)
{
struct paste_buffer *pb;
if (idx >= ARRAY_LENGTH(ps))
return (-1);
pb = ARRAY_ITEM(ps, idx);
ARRAY_REMOVE(ps, idx);
xfree(pb->data);
xfree(pb);
return (0);
}
/*
* Add an item onto the top of the stack, freeing the bottom if at limit. Note
* that the caller is responsible for allocating data.
*/
void
paste_add(struct paste_stack *ps, char *data, size_t size, u_int limit)
{
struct paste_buffer *pb;
if (size == 0)
return;
while (ARRAY_LENGTH(ps) >= limit) {
pb = ARRAY_LAST(ps);
xfree(pb->data);
xfree(pb);
ARRAY_TRUNC(ps, 1);
}
pb = xmalloc(sizeof *pb);
ARRAY_INSERT(ps, 0, pb);
pb->data = data;
pb->size = size;
}
/*
* Replace an item on the stack. Note that the caller is responsible for
* allocating data.
*/
int
paste_replace(struct paste_stack *ps, u_int idx, char *data, size_t size)
{
struct paste_buffer *pb;
if (size == 0)
return (0);
if (idx >= ARRAY_LENGTH(ps))
return (-1);
pb = ARRAY_ITEM(ps, idx);
xfree(pb->data);
pb->data = data;
pb->size = size;
return (0);
}
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