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NodeList.c
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WebKit
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tests
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NodeList.c
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/*
* Copyright (C) 2006 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``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 APPLE INC. OR
* CONTRIBUTORS 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
"config.h"
#include
"NodeList.h"
#include
<stdlib.h>
extern
NodeList
*
NodeList_new
(
Node
*
parentNode
)
{
Node_ref
(
parentNode
);
NodeList
*
nodeList
=
(
NodeList
*
)
malloc
(
sizeof
(
NodeList
));
nodeList
->
parentNode
=
parentNode
;
nodeList
->
refCount
=
0
;
return
nodeList
;
}
extern
unsigned
NodeList_length
(
NodeList
*
nodeList
)
{
/* Linear count from tail -- good enough for our purposes here */
unsigned
i
=
0
;
NodeLink
*
n
=
nodeList
->
parentNode
->
childNodesTail
;
while
(
n
) {
n
=
n
->
prev
;
++
i
;
}
return
i
;
}
extern
Node
*
NodeList_item
(
NodeList
*
nodeList
,
unsigned
index
)
{
unsigned
length
=
NodeList_length
(
nodeList
);
if
(
index
>=
length
)
return
NULL
;
/* Linear search from tail -- good enough for our purposes here */
NodeLink
*
n
=
nodeList
->
parentNode
->
childNodesTail
;
unsigned
i
=
0
;
unsigned
count
=
length
-
1
-
index
;
while
(
i
<
count
) {
++
i
;
n
=
n
->
prev
;
}
return
n
->
node
;
}
extern
void
NodeList_ref
(
NodeList
*
nodeList
)
{
++
nodeList
->
refCount
;
}
extern
void
NodeList_deref
(
NodeList
*
nodeList
)
{
if
(
--
nodeList
->
refCount
==
0
) {
Node_deref
(
nodeList
->
parentNode
);
free
(
nodeList
);
}
}
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