mirror of
https://github.com/mozilla/gecko-dev.git
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513 lines
12 KiB
C++
513 lines
12 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 4 -*-
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*
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* The contents of this file are subject to the Netscape Public
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* License Version 1.1 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.mozilla.org/NPL/
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*
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* Software distributed under the License is distributed on an "AS
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* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
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* implied. See the License for the specific language governing
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* rights and limitations under the License.
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*
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* The Original Code is mozilla.org code.
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*
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* The Initial Developer of the Original Code is Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 1998 Netscape Communications Corporation. All
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* Rights Reserved.
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*
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* Contributor(s):
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* Pierre Phaneuf <pp@ludusdesign.com>
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*/
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#define NS_IMPL_IDS
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#include "nsPersistentProperties.h"
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#include "nsID.h"
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#include "nsCRT.h"
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#include "nsIInputStream.h"
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#include "nsIProperties.h"
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#include "nsIUnicharInputStream.h"
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#include "nsProperties.h"
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#include "pratom.h"
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#include "nsEnumeratorUtils.h"
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static PLHashNumber
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HashKey(const PRUnichar *aString)
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{
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return (PLHashNumber) nsCRT::HashCode(aString);
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}
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static PRIntn
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CompareKeys(const PRUnichar *aStr1, const PRUnichar *aStr2)
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{
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return nsCRT::strcmp(aStr1, aStr2) == 0;
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}
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nsPersistentProperties::nsPersistentProperties()
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{
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NS_INIT_REFCNT();
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mIn = nsnull;
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mSubclass = NS_STATIC_CAST(nsIPersistentProperties*, this);
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mTable = PL_NewHashTable(128, (PLHashFunction) HashKey,
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(PLHashComparator) CompareKeys,
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(PLHashComparator) nsnull, nsnull, nsnull);
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}
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PR_STATIC_CALLBACK(PRIntn)
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FreeHashEntries(PLHashEntry* he, PRIntn i, void* arg)
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{
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nsCRT::free((PRUnichar*)he->key);
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nsCRT::free((PRUnichar*)he->value);
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return HT_ENUMERATE_REMOVE;
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}
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nsPersistentProperties::~nsPersistentProperties()
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{
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if (mTable) {
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// Free the PRUnicode* pointers contained in the hash table entries
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PL_HashTableEnumerateEntries(mTable, FreeHashEntries, 0);
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PL_HashTableDestroy(mTable);
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mTable = nsnull;
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}
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}
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NS_METHOD
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nsPersistentProperties::Create(nsISupports *aOuter, REFNSIID aIID, void **aResult)
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{
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if (aOuter)
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return NS_ERROR_NO_AGGREGATION;
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nsPersistentProperties* props = new nsPersistentProperties();
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if (props == nsnull)
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return NS_ERROR_OUT_OF_MEMORY;
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NS_ADDREF(props);
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nsresult rv = props->QueryInterface(aIID, aResult);
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NS_RELEASE(props);
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return rv;
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}
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NS_IMPL_THREADSAFE_ISUPPORTS2(nsPersistentProperties, nsIPersistentProperties, nsIProperties)
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NS_IMETHODIMP
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nsPersistentProperties::Load(nsIInputStream *aIn)
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{
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PRInt32 c;
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nsresult ret = NS_ERROR_FAILURE;
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nsAutoString uesc;
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uesc.AssignWithConversion("UTF-8");
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#ifndef XPCOM_STANDALONE
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ret = NS_NewConverterStream(&mIn, nsnull, aIn, 0, &uesc);
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#endif /* XPCOM_STANDALONE */
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if (ret != NS_OK) {
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#ifdef NS_DEBUG
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printf("NS_NewConverterStream failed\n");
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#endif
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return NS_ERROR_FAILURE;
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}
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c = Read();
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while (1) {
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c = SkipWhiteSpace(c);
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if (c < 0) {
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break;
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}
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else if ((c == '#') || (c == '!')) {
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c = SkipLine(c);
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continue;
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}
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else {
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nsAutoString key;
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while ((c >= 0) && (c != '=') && (c != ':')) {
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key.Append((PRUnichar) c);
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c = Read();
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}
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if (c < 0) {
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break;
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}
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char *trimThese = " \t";
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key.Trim(trimThese, PR_FALSE, PR_TRUE);
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c = Read();
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nsAutoString value;
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PRUint32 state = 0;
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PRUnichar uchar = 0;
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while ((c >= 0) && (c != '\r') && (c != '\n')) {
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switch(state) {
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case 0:
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if (c == '\\') {
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c = Read();
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switch(c) {
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case '\r':
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case '\n':
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c = SkipWhiteSpace(c);
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value.Append((PRUnichar) c);
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break;
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case 'u':
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case 'U':
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state = 1;
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uchar=0;
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break;
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case 't':
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value.AppendWithConversion('\t');
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break;
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case 'n':
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value.AppendWithConversion('\n');
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break;
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case 'r':
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value.AppendWithConversion('\r');
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break;
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default:
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value.Append((PRUnichar) c);
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} // switch(c)
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} else {
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value.Append((PRUnichar) c);
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}
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c = Read();
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break;
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case 1:
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case 2:
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case 3:
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case 4:
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if(('0' <= c) && (c <= '9')) {
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uchar = (uchar << 4) | (c - '0');
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state++;
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c = Read();
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} else if(('a' <= c) && (c <= 'f')) {
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uchar = (uchar << 4) | (c - 'a' + 0x0a);
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state++;
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c = Read();
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} else if(('A' <= c) && (c <= 'F')) {
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uchar = (uchar << 4) | (c - 'A' + 0x0a);
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state++;
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c = Read();
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} else {
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value.Append((PRUnichar) uchar);
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state = 0;
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}
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break;
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case 5:
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value.Append((PRUnichar) uchar);
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state = 0;
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}
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}
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if(state != 0) {
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value.Append((PRUnichar) uchar);
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state = 0;
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}
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value.Trim(trimThese, PR_TRUE, PR_TRUE);
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nsAutoString oldValue;
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mSubclass->SetStringProperty(key, value, oldValue);
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}
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}
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mIn->Close();
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NS_RELEASE(mIn);
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NS_ASSERTION(!mIn, "unexpected remaining reference");
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return NS_OK;
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}
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NS_IMETHODIMP
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nsPersistentProperties::SetStringProperty(const nsString& aKey, nsString& aNewValue,
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nsString& aOldValue)
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{
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// XXX The ToNewCString() calls allocate memory using "new" so this code
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// causes a memory leak...
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#if 0
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cout << "will add " << aKey.ToNewCString() << "=" << aNewValue.ToNewCString() << endl;
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#endif
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if (!mTable) {
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return NS_ERROR_FAILURE;
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}
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const PRUnichar *key = aKey.GetUnicode(); // returns internal pointer (not a copy)
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PRUint32 len;
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PRUint32 hashValue = nsCRT::HashCode(key, &len);
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PLHashEntry **hep = PL_HashTableRawLookup(mTable, hashValue, key);
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PLHashEntry *he = *hep;
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if (he) {
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// XXX should we copy the old value to aOldValue, and then remove it?
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#ifdef NS_DEBUG
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char buf[128];
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aKey.ToCString(buf, sizeof(buf));
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printf("warning: property %s already exists\n", buf);
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#endif
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return NS_OK;
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}
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PL_HashTableRawAdd(mTable, hep, hashValue, aKey.ToNewUnicode(),
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aNewValue.ToNewUnicode());
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return NS_OK;
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}
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NS_IMETHODIMP
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nsPersistentProperties::Save(nsIOutputStream* aOut, const nsString& aHeader)
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{
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return NS_ERROR_NOT_IMPLEMENTED;
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}
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NS_IMETHODIMP
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nsPersistentProperties::Subclass(nsIPersistentProperties* aSubclass)
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{
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if (aSubclass) {
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mSubclass = aSubclass;
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}
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return NS_OK;
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}
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NS_IMETHODIMP
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nsPersistentProperties::GetStringProperty(const nsString& aKey, nsString& aValue)
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{
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if (!mTable)
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return NS_ERROR_FAILURE;
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const PRUnichar *key = aKey.GetUnicode();
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if (!mTable) {
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return NS_ERROR_FAILURE;
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}
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PRUint32 len;
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PRUint32 hashValue = nsCRT::HashCode(key, &len);
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PLHashEntry **hep = PL_HashTableRawLookup(mTable, hashValue, key);
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PLHashEntry *he = *hep;
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if (he) {
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aValue = (const PRUnichar*)he->value;
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return NS_OK;
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}
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return NS_ERROR_FAILURE;
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}
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PR_STATIC_CALLBACK(PRIntn)
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AddElemToArray(PLHashEntry* he, PRIntn i, void* arg)
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{
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nsISupportsArray *propArray = (nsISupportsArray *) arg;
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nsString* keyStr = new nsString((PRUnichar*) he->key);
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nsString* valueStr = new nsString((PRUnichar*) he->value);
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nsPropertyElement *element = new nsPropertyElement();
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if (!element)
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return HT_ENUMERATE_STOP;
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NS_ADDREF(element);
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element->SetKey(keyStr);
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element->SetValue(valueStr);
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propArray->InsertElementAt(element, i);
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return HT_ENUMERATE_NEXT;
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}
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NS_IMETHODIMP
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nsPersistentProperties::EnumerateProperties(nsIBidirectionalEnumerator** aResult)
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{
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if (!mTable)
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return NS_ERROR_FAILURE;
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nsISupportsArray* propArray;
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nsresult rv = NS_NewISupportsArray(&propArray);
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if (rv != NS_OK)
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return rv;
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// Step through hash entries populating a transient array
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PRIntn n = PL_HashTableEnumerateEntries(mTable, AddElemToArray, (void *)propArray);
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if ( n < (PRIntn) mTable->nentries )
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return NS_ERROR_OUT_OF_MEMORY;
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// Convert array into enumerator
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rv = NS_NewISupportsArrayEnumerator(propArray, aResult);
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if (rv != NS_OK)
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return rv;
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return NS_OK;
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}
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NS_IMETHODIMP
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nsPersistentProperties::SimpleEnumerateProperties(nsISimpleEnumerator** aResult)
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{
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nsCOMPtr<nsIBidirectionalEnumerator> iterator;
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if (!mTable)
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return NS_ERROR_FAILURE;
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nsISupportsArray* propArray;
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nsresult rv = NS_NewISupportsArray(&propArray);
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if (rv != NS_OK)
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return rv;
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// Step through hash entries populating a transient array
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PRIntn n = PL_HashTableEnumerateEntries(mTable, AddElemToArray, (void *)propArray);
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if ( n < (PRIntn) mTable->nentries )
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return NS_ERROR_OUT_OF_MEMORY;
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// Convert array into enumerator
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rv = NS_NewISupportsArrayEnumerator(propArray, getter_AddRefs(iterator));
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// Convert nsIEnumerator into nsISimpleEnumerator
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rv = NS_NewAdapterEnumerator(aResult, iterator);
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if (rv != NS_OK)
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return rv;
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return NS_OK;
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}
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PRInt32
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nsPersistentProperties::Read()
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{
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PRUnichar c;
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PRUint32 nRead;
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nsresult ret;
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ret = mIn->Read(&c, 0, 1, &nRead);
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if (ret == NS_OK && nRead == 1) {
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return c;
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}
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return -1;
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}
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#define IS_WHITE_SPACE(c) \
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(((c) == ' ') || ((c) == '\t') || ((c) == '\r') || ((c) == '\n'))
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PRInt32
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nsPersistentProperties::SkipWhiteSpace(PRInt32 c)
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{
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while ((c >= 0) && IS_WHITE_SPACE(c)) {
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c = Read();
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}
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return c;
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}
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PRInt32
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nsPersistentProperties::SkipLine(PRInt32 c)
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{
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while ((c >= 0) && (c != '\r') && (c != '\n')) {
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c = Read();
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}
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if (c == '\r') {
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c = Read();
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}
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if (c == '\n') {
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c = Read();
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}
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return c;
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}
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////////////////////////////////////////////////////////////////////////////////
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// XXX Some day we'll unify the nsIPersistentProperties interface with
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// nsIProperties, but until now...
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NS_IMETHODIMP
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nsPersistentProperties::Define(const char* prop, nsISupports* initialValue)
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{
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return NS_ERROR_NOT_IMPLEMENTED;
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}
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NS_IMETHODIMP
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nsPersistentProperties::Undefine(const char* prop)
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{
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return NS_ERROR_NOT_IMPLEMENTED;
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}
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NS_IMETHODIMP
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nsPersistentProperties::Get(const char* prop, const nsIID & uuid, void* *result)
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{
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return NS_ERROR_NOT_IMPLEMENTED;
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}
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NS_IMETHODIMP
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nsPersistentProperties::Set(const char* prop, nsISupports* value)
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{
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return NS_ERROR_NOT_IMPLEMENTED;
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}
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NS_IMETHODIMP
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nsPersistentProperties::Has(const char* prop, PRBool *result)
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{
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return NS_ERROR_NOT_IMPLEMENTED;
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}
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////////////////////////////////////////////////////////////////////////////////
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// PropertyElement
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////////////////////////////////////////////////////////////////////////////////
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nsPropertyElement::nsPropertyElement()
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{
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NS_INIT_REFCNT();
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mKey = nsnull;
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mValue = nsnull;
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}
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nsPropertyElement::~nsPropertyElement()
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{
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if (mKey)
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delete mKey;
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if (mValue)
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delete mValue;
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}
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NS_METHOD
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nsPropertyElement::Create(nsISupports *aOuter, REFNSIID aIID, void **aResult)
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{
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if (aOuter)
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return NS_ERROR_NO_AGGREGATION;
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nsPropertyElement* propElem = new nsPropertyElement();
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if (propElem == nsnull)
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return NS_ERROR_OUT_OF_MEMORY;
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NS_ADDREF(propElem);
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nsresult rv = propElem->QueryInterface(aIID, aResult);
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NS_RELEASE(propElem);
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return rv;
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}
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NS_IMPL_ISUPPORTS1(nsPropertyElement, nsIPropertyElement)
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NS_IMETHODIMP
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nsPropertyElement::GetKey(PRUnichar **aReturnKey)
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{
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if (aReturnKey)
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{
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*aReturnKey = (PRUnichar *) mKey->ToNewUnicode();
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return NS_OK;
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}
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return NS_ERROR_INVALID_POINTER;
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}
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NS_IMETHODIMP
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nsPropertyElement::GetValue(PRUnichar **aReturnValue)
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{
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if (aReturnValue)
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{
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*aReturnValue = (PRUnichar *) mValue->ToNewUnicode();
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return NS_OK;
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}
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return NS_ERROR_INVALID_POINTER;
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}
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NS_IMETHODIMP
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nsPropertyElement::SetKey(nsString* aKey)
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{
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mKey = aKey;
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return NS_OK;
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}
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NS_IMETHODIMP
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nsPropertyElement::SetValue(nsString* aValue)
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{
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mValue = aValue;
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return NS_OK;
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}
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////////////////////////////////////////////////////////////////////////////////
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