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/* The contents of this file are subject to the Mozilla Public License
* Version 1.0 (the "License"); you may not use this file except in
* compliance with the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS"
* basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
* License for the specific language governing rights and limitations
* under the License.
*
* The Original Code is Mobile Application Link.
*
* The Initial Developer of the Original Code is AvantGo, Inc.
* Portions created by AvantGo, Inc. are Copyright (C) 1997-1999
* AvantGo, Inc. All Rights Reserved.
*
* Contributor(s):
*/
// Owner: linus
#include <AGCollection.h>
#include <AGUtil.h>
ExportFunc void AGCollectionCallbacksInit(AGCollectionCallbacks *callbacks,
AGElementType elemType)
{
bzero(callbacks, sizeof(*callbacks));
switch (elemType) {
case AGIntegerElements:
break;
case AGOwnedStringElements:
callbacks->compareFunc = (AGCompareCallback)AGStrCmp;
callbacks->hashFunc = (AGHashCallback)AGStrHash;
callbacks->removeFunc = AGFreeFunc;
break;
case AGUnownedStringElements:
callbacks->compareFunc = (AGCompareCallback)AGStrCmp;
callbacks->hashFunc = (AGHashCallback)AGStrHash;
break;
case AGOwnedPointerElements:
callbacks->hashFunc = AGPtrHash;
callbacks->removeFunc = AGFreeFunc;
break;
case AGUnownedPointerElements:
callbacks->hashFunc = AGPtrHash;
break;
case AGCustomElements:
break;
default:
break;
}
}
ExportFunc int32 AGStrCmp(char *s1, char *s2)
{
if (s1 == s2) {
return 0;
}
if (s1 == NULL) {
return -1;
}
if (s2 == NULL) {
return 1;
}
return strcmp(s1, s2);
}
ExportFunc int32 AGStrHash(char *str)
{
uint32 hash, c;
if (str == NULL) {
return 0;
}
hash = 0;
while ((c = *str++) != 0) {
hash = (hash * 39) + c;
}
return hash;
}
ExportFunc int32 AGPtrHash(void *ptr)
{
// Memory is typeically allocated 4 byte aligned
// so throw away the bottom two bits.
return ((uint32)ptr >> 2);
}
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