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C++ wrapper for PLDHashTable (bug 125489), r=alecf@netscape.com, sr=brendan@mozilla.org

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This commit is contained in:
jkeiser%netscape.com 2002-02-20 06:08:53 +00:00
parent aa9b138f6f
commit b80501852c
6 changed files with 328 additions and 0 deletions
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1
xpcom/ds/MANIFEST
View File

@ -3,6 +3,7 @@ nsAtomService.h
nsCppSharedAllocator.h
nsCRT.h
nsDeque.h
nsDoubleHashtable.h
nsEnumeratorUtils.h
nsFixedSizeAllocator.h
nsHashtable.h

2
xpcom/ds/Makefile.in
View File

@ -47,6 +47,7 @@ CPPSRCS = \
nsCRT.cpp \
nsConjoiningEnumerator.cpp \
nsDeque.cpp \
nsDoubleHashtable.cpp \
nsEmptyEnumerator.cpp \
nsEnumeratorUtils.cpp \
nsFixedSizeAllocator.cpp \
@ -79,6 +80,7 @@ EXPORTS = \
nsCppSharedAllocator.h \
nsCRT.h \
nsDeque.h \
nsDoubleHashtable.h \
nsEnumeratorUtils.h \
nsFixedSizeAllocator.h \
nsHashtable.h \

2
xpcom/ds/makefile.win
View File

@ -34,6 +34,7 @@ EXPORTS = \
nsCppSharedAllocator.h \
nsCRT.h \
nsDeque.h \
nsDoubleHashtable.h \
nsEnumeratorUtils.h \
nsFixedSizeAllocator.h \
nsHashtable.h \
@ -98,6 +99,7 @@ CPP_OBJS = \
.\$(OBJDIR)\nsCRT.obj \
.\$(OBJDIR)\nsConjoiningEnumerator.obj \
.\$(OBJDIR)\nsDeque.obj \
.\$(OBJDIR)\nsDoubleHashtable.obj \
.\$(OBJDIR)\nsEmptyEnumerator.obj \
.\$(OBJDIR)\nsEnumeratorUtils.obj \
.\$(OBJDIR)\nsFixedSizeAllocator.obj \

205
xpcom/ds/nsDoubleHashtable.cpp Normal file
View File

@ -0,0 +1,205 @@
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: NPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Netscape Public License
* Version 1.1 (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/NPL/
*
* 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 Mozilla Communicator client code.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 1998
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
*
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the NPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the NPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#include "nsDoubleHashtable.h"
#include "nsISupports.h"
#include "nsString.h"
#include "nsReadableUtils.h"
//
// KEY String
//
class PLDHashStringEntry : public PLDHashEntryHdr
{
public:
PLDHashStringEntry(const nsAString& aString) :
mKey(aString) { }
nsString mKey;
};
PR_STATIC_CALLBACK(const void *)
PLDHashStringGetKey(PLDHashTable *table, PLDHashEntryHdr *entry)
{
PLDHashStringEntry *e = NS_STATIC_CAST(PLDHashStringEntry *, entry);
return NS_STATIC_CAST(const nsAString *, &e->mKey);
}
PR_STATIC_CALLBACK(PLDHashNumber)
PLDHashStringHashKey(PLDHashTable *table, const void *key)
{
const nsAString *str = NS_STATIC_CAST(const nsAString *, key);
return HashString(*str);
}
PR_STATIC_CALLBACK(PRBool)
PLDHashStringMatchEntry(PLDHashTable *table, const PLDHashEntryHdr *entry,
const void *key)
{
const PLDHashStringEntry *e =
NS_STATIC_CAST(const PLDHashStringEntry *, entry);
const nsAString *str = NS_STATIC_CAST(const nsAString *, key);
return str->Equals(e->mKey);
}
//
// ENTRY StringSupports
//
class PLDHashStringSupportsEntry : public PLDHashStringEntry
{
public:
PLDHashStringSupportsEntry(const nsAString& aString) :
PLDHashStringEntry(aString)
{
}
~PLDHashStringSupportsEntry() {
}
nsCOMPtr<nsISupports> mVal;
};
PR_STATIC_CALLBACK(void)
PLDHashStringSupportsClearEntry(PLDHashTable *table, PLDHashEntryHdr *entry)
{
PLDHashStringSupportsEntry *e = NS_STATIC_CAST(PLDHashStringSupportsEntry *,
entry);
// An entry is being cleared, let the entry down its own cleanup.
e->~PLDHashStringSupportsEntry();
}
PR_STATIC_CALLBACK(void)
PLDHashStringSupportsInitEntry(PLDHashTable *table, PLDHashEntryHdr *entry,
const void *key)
{
const nsAString *keyStr = NS_STATIC_CAST(const nsAString *, key);
// Initialize the entry with placement new
new (entry) PLDHashStringSupportsEntry(*keyStr);
}
#define INIT_STRING_HASH(_HASHNAME_) \
static PLDHashTableOps hash_table_ops = \
{ \
PL_DHashAllocTable, \
PL_DHashFreeTable, \
PLDHashStringGetKey, \
PLDHashStringHashKey, \
PLDHashStringMatchEntry, \
PL_DHashMoveEntryStub, \
_HASHNAME_##ClearEntry, \
PL_DHashFinalizeStub, \
_HASHNAME_##InitEntry \
}; \
if (!mHashTable.ops) { \
PRBool isLive = PL_DHashTableInit(&mHashTable, \
&hash_table_ops, nsnull, \
sizeof(_HASHNAME_##Entry), 16); \
if (!isLive) { \
mHashTable.ops = nsnull; \
return NS_ERROR_OUT_OF_MEMORY; \
} \
}
//
// HASH StringSupports
//
nsDoubleHashtableStringSupports::nsDoubleHashtableStringSupports()
{
// MUST init mHashTable.ops to nsnull so that we can detect that the
// hashtable has not been initialized.
mHashTable.ops = nsnull;
};
nsDoubleHashtableStringSupports::~nsDoubleHashtableStringSupports()
{
if (mHashTable.ops) {
PL_DHashTableFinish(&mHashTable);
}
}
nsresult
nsDoubleHashtableStringSupports::Init()
{
INIT_STRING_HASH(PLDHashStringSupports)
return NS_OK;
}
already_AddRefed<nsISupports>
nsDoubleHashtableStringSupports::Get(const nsAString& aKey)
{
PLDHashStringSupportsEntry * entry =
NS_STATIC_CAST(PLDHashStringSupportsEntry *,
PL_DHashTableOperate(&mHashTable, &aKey,
PL_DHASH_LOOKUP));
if (!PL_DHASH_ENTRY_IS_LIVE(entry)) {
return nsnull;
}
nsISupports* supports = entry->mVal;
NS_IF_ADDREF(supports);
return supports;
}
nsresult
nsDoubleHashtableStringSupports::Put(const nsAString& aKey,
nsISupports* aResult)
{
PLDHashStringSupportsEntry * entry =
NS_STATIC_CAST(PLDHashStringSupportsEntry *,
PL_DHashTableOperate(&mHashTable, &aKey,
PL_DHASH_ADD));
NS_ENSURE_TRUE(entry, NS_ERROR_OUT_OF_MEMORY);
//
// Add the entry
//
entry->mVal = aResult;
return NS_OK;
}
nsresult
nsDoubleHashtableStringSupports::Remove(nsAString& aKey)
{
PL_DHashTableOperate(&mHashTable, &aKey, PL_DHASH_REMOVE);
return NS_OK;
}

88
xpcom/ds/nsDoubleHashtable.h Normal file
View File

@ -0,0 +1,88 @@
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: NPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Netscape Public License
* Version 1.1 (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/NPL/
*
* 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 Mozilla Communicator client code.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 1998
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
*
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the NPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the NPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#include "pldhash.h"
#include "nscore.h"
#include "nsCOMPtr.h"
class nsAString;
class nsISupports;
/**
* nsDoubleHashtableStringSupports
*
* A hashtable from string -> nsISupports*. Holds strong references.
*/
class nsDoubleHashtableStringSupports {
public:
nsDoubleHashtableStringSupports();
~nsDoubleHashtableStringSupports();
/**
* Get the value referenced by the key.
* Being a getter, this returns a strong reference.
* @param aKey the key
* @return the object referenced by aKey, or nsnull if none
*/
already_AddRefed<nsISupports> Get(const nsAString& aKey);
/**
* Put the value into the hash to be referenced by the key.
* @param aKey the key
* @param aResult the return value
*/
nsresult Put(const nsAString& aKey, nsISupports* aResult);
/**
* Remove the entry from the hash referenced by the key.
* @param aKey the key
* @param aResult the return value
*/
nsresult Remove(nsAString& aKey);
/**
* Initialize this hashtable. This MUST be called for the hashtable
* to work.
*/
nsresult Init();
protected:
// Init() is protected because I want people to just be able to use the class
// without fussing, so it's called in the constructor.
PLDHashTable mHashTable;
};

30
xpcom/macbuild/xpcomPPC.xml
View File

@ -1219,6 +1219,13 @@
<FILEKIND>Text</FILEKIND>
<FILEFLAGS>Debug</FILEFLAGS>
</FILE>
<FILE>
<PATHTYPE>Name</PATHTYPE>
<PATH>nsDoubleHashtable.cpp</PATH>
<PATHFORMAT>MacOS</PATHFORMAT>
<FILEKIND>Text</FILEKIND>
<FILEFLAGS>Debug</FILEFLAGS>
</FILE>
<FILE>
<PATHTYPE>Name</PATHTYPE>
<PATH>nsObserver.cpp</PATH>
@ -2026,6 +2033,11 @@
<PATH>nsDeque.cpp</PATH>
<PATHFORMAT>MacOS</PATHFORMAT>
</FILEREF>
<FILEREF>
<PATHTYPE>Name</PATHTYPE>
<PATH>nsDoubleHashtable.cpp</PATH>
<PATHFORMAT>MacOS</PATHFORMAT>
</FILEREF>
<FILEREF>
<PATHTYPE>Name</PATHTYPE>
<PATH>nsObserver.cpp</PATH>
@ -3671,6 +3683,13 @@
<FILEKIND>Text</FILEKIND>
<FILEFLAGS>Debug</FILEFLAGS>
</FILE>
<FILE>
<PATHTYPE>Name</PATHTYPE>
<PATH>nsDoubleHashtable.cpp</PATH>
<PATHFORMAT>MacOS</PATHFORMAT>
<FILEKIND>Text</FILEKIND>
<FILEFLAGS>Debug</FILEFLAGS>
</FILE>
<FILE>
<PATHTYPE>Name</PATHTYPE>
<PATH>nsObserver.cpp</PATH>
@ -4483,6 +4502,11 @@
<PATH>nsDeque.cpp</PATH>
<PATHFORMAT>MacOS</PATHFORMAT>
</FILEREF>
<FILEREF>
<PATHTYPE>Name</PATHTYPE>
<PATH>nsDoubleHashtable.cpp</PATH>
<PATHFORMAT>MacOS</PATHFORMAT>
</FILEREF>
<FILEREF>
<PATHTYPE>Name</PATHTYPE>
<PATH>nsObserver.cpp</PATH>
@ -5170,6 +5194,12 @@
<PATH>nsDeque.cpp</PATH>
<PATHFORMAT>MacOS</PATHFORMAT>
</FILEREF>
<FILEREF>
<TARGETNAME>xpcom.shlb</TARGETNAME>
<PATHTYPE>Name</PATHTYPE>
<PATH>nsDoubleHashtable.cpp</PATH>
<PATHFORMAT>MacOS</PATHFORMAT>
</FILEREF>
<FILEREF>
<TARGETNAME>xpcom.shlb</TARGETNAME>
<PATHTYPE>Name</PATHTYPE>