gecko-dev/dom/commandhandler/nsCommandParams.cpp

265 строки
6.5 KiB
C++

/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "xpcom-config.h"
#include <new>
#include "nscore.h"
#include "nsCRT.h"
#include "nsCommandParams.h"
#include "mozilla/HashFunctions.h"
using namespace mozilla;
const PLDHashTableOps nsCommandParams::sHashOps =
{
HashKey,
HashMatchEntry,
HashMoveEntry,
HashClearEntry
};
NS_IMPL_ISUPPORTS(nsCommandParams, nsICommandParams)
nsCommandParams::nsCommandParams()
: mValuesHash(&sHashOps, sizeof(HashEntry), 2)
{
}
nsCommandParams::~nsCommandParams()
{
}
NS_IMETHODIMP
nsCommandParams::GetValueType(const char* aName, int16_t* aRetVal)
{
NS_ENSURE_ARG_POINTER(aRetVal);
HashEntry* foundEntry = GetNamedEntry(aName);
if (foundEntry) {
*aRetVal = foundEntry->mEntryType;
return NS_OK;
}
*aRetVal = eNoType;
return NS_ERROR_FAILURE;
}
NS_IMETHODIMP
nsCommandParams::GetBooleanValue(const char* aName, bool* aRetVal)
{
NS_ENSURE_ARG_POINTER(aRetVal);
HashEntry* foundEntry = GetNamedEntry(aName);
if (foundEntry && foundEntry->mEntryType == eBooleanType) {
*aRetVal = foundEntry->mData.mBoolean;
return NS_OK;
}
*aRetVal = false;
return NS_ERROR_FAILURE;
}
NS_IMETHODIMP
nsCommandParams::GetLongValue(const char* aName, int32_t* aRetVal)
{
NS_ENSURE_ARG_POINTER(aRetVal);
HashEntry* foundEntry = GetNamedEntry(aName);
if (foundEntry && foundEntry->mEntryType == eLongType) {
*aRetVal = foundEntry->mData.mLong;
return NS_OK;
}
*aRetVal = false;
return NS_ERROR_FAILURE;
}
NS_IMETHODIMP
nsCommandParams::GetDoubleValue(const char* aName, double* aRetVal)
{
NS_ENSURE_ARG_POINTER(aRetVal);
HashEntry* foundEntry = GetNamedEntry(aName);
if (foundEntry && foundEntry->mEntryType == eDoubleType) {
*aRetVal = foundEntry->mData.mDouble;
return NS_OK;
}
*aRetVal = 0.0;
return NS_ERROR_FAILURE;
}
NS_IMETHODIMP
nsCommandParams::GetStringValue(const char* aName, nsAString& aRetVal)
{
HashEntry* foundEntry = GetNamedEntry(aName);
if (foundEntry && foundEntry->mEntryType == eWStringType) {
NS_ASSERTION(foundEntry->mData.mString, "Null string");
aRetVal.Assign(*foundEntry->mData.mString);
return NS_OK;
}
aRetVal.Truncate();
return NS_ERROR_FAILURE;
}
NS_IMETHODIMP
nsCommandParams::GetCStringValue(const char* aName, char** aRetVal)
{
NS_ENSURE_ARG_POINTER(aRetVal);
HashEntry* foundEntry = GetNamedEntry(aName);
if (foundEntry && foundEntry->mEntryType == eStringType) {
NS_ASSERTION(foundEntry->mData.mCString, "Null string");
*aRetVal = ToNewCString(*foundEntry->mData.mCString);
return NS_OK;
}
*aRetVal = nullptr;
return NS_ERROR_FAILURE;
}
NS_IMETHODIMP
nsCommandParams::GetISupportsValue(const char* aName, nsISupports** aRetVal)
{
NS_ENSURE_ARG_POINTER(aRetVal);
HashEntry* foundEntry = GetNamedEntry(aName);
if (foundEntry && foundEntry->mEntryType == eISupportsType) {
NS_IF_ADDREF(*aRetVal = foundEntry->mISupports.get());
return NS_OK;
}
*aRetVal = nullptr;
return NS_ERROR_FAILURE;
}
NS_IMETHODIMP
nsCommandParams::SetBooleanValue(const char* aName, bool aValue)
{
HashEntry* foundEntry = GetOrMakeEntry(aName, eBooleanType);
if (!foundEntry) {
return NS_ERROR_OUT_OF_MEMORY;
}
foundEntry->mData.mBoolean = aValue;
return NS_OK;
}
NS_IMETHODIMP
nsCommandParams::SetLongValue(const char* aName, int32_t aValue)
{
HashEntry* foundEntry = GetOrMakeEntry(aName, eLongType);
if (!foundEntry) {
return NS_ERROR_OUT_OF_MEMORY;
}
foundEntry->mData.mLong = aValue;
return NS_OK;
}
NS_IMETHODIMP
nsCommandParams::SetDoubleValue(const char* aName, double aValue)
{
HashEntry* foundEntry = GetOrMakeEntry(aName, eDoubleType);
if (!foundEntry) {
return NS_ERROR_OUT_OF_MEMORY;
}
foundEntry->mData.mDouble = aValue;
return NS_OK;
}
NS_IMETHODIMP
nsCommandParams::SetStringValue(const char* aName, const nsAString& aValue)
{
HashEntry* foundEntry = GetOrMakeEntry(aName, eWStringType);
if (!foundEntry) {
return NS_ERROR_OUT_OF_MEMORY;
}
foundEntry->mData.mString = new nsString(aValue);
return NS_OK;
}
NS_IMETHODIMP
nsCommandParams::SetCStringValue(const char* aName, const char* aValue)
{
HashEntry* foundEntry = GetOrMakeEntry(aName, eStringType);
if (!foundEntry) {
return NS_ERROR_OUT_OF_MEMORY;
}
foundEntry->mData.mCString = new nsCString(aValue);
return NS_OK;
}
NS_IMETHODIMP
nsCommandParams::SetISupportsValue(const char* aName, nsISupports* aValue)
{
HashEntry* foundEntry = GetOrMakeEntry(aName, eISupportsType);
if (!foundEntry) {
return NS_ERROR_OUT_OF_MEMORY;
}
foundEntry->mISupports = aValue; // addrefs
return NS_OK;
}
NS_IMETHODIMP
nsCommandParams::RemoveValue(const char* aName)
{
mValuesHash.Remove((void*)aName);
return NS_OK;
}
nsCommandParams::HashEntry*
nsCommandParams::GetNamedEntry(const char* aName)
{
return static_cast<HashEntry*>(mValuesHash.Search((void*)aName));
}
nsCommandParams::HashEntry*
nsCommandParams::GetOrMakeEntry(const char* aName, uint8_t aEntryType)
{
auto foundEntry = static_cast<HashEntry*>(mValuesHash.Search((void*)aName));
if (foundEntry) { // reuse existing entry
foundEntry->Reset(aEntryType);
return foundEntry;
}
foundEntry = static_cast<HashEntry*>(mValuesHash.Add((void*)aName, fallible));
if (!foundEntry) {
return nullptr;
}
// Use placement new. Our ctor does not clobber keyHash, which is important.
new (foundEntry) HashEntry(aEntryType, aName);
return foundEntry;
}
PLDHashNumber
nsCommandParams::HashKey(const void* aKey)
{
return HashString((const char*)aKey);
}
bool
nsCommandParams::HashMatchEntry(const PLDHashEntryHdr* aEntry, const void* aKey)
{
const char* keyString = (const char*)aKey;
const HashEntry* thisEntry = static_cast<const HashEntry*>(aEntry);
return thisEntry->mEntryName.Equals(keyString);
}
void
nsCommandParams::HashMoveEntry(PLDHashTable* aTable,
const PLDHashEntryHdr* aFrom,
PLDHashEntryHdr* aTo)
{
const HashEntry* fromEntry = static_cast<const HashEntry*>(aFrom);
HashEntry* toEntry = static_cast<HashEntry*>(aTo);
new (toEntry) HashEntry(*fromEntry);
fromEntry->~HashEntry();
}
void
nsCommandParams::HashClearEntry(PLDHashTable* aTable, PLDHashEntryHdr* aEntry)
{
HashEntry* thisEntry = static_cast<HashEntry*>(aEntry);
thisEntry->~HashEntry();
}