1 files changed, 303 insertions, 0 deletions
diff --git a/dom/commandhandler/nsCommandParams.cpp b/dom/commandhandler/nsCommandParams.cpp
new file mode 100644
index 0000000000..5ac76abb43
--- /dev/null
+++ b/dom/commandhandler/nsCommandParams.cpp
@@ -0,0 +1,303 @@
+/* -*- 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() = default;
+
+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);
+
+  ErrorResult error;
+  *aRetVal = GetBool(aName, error);
+  return error.StealNSResult();
+}
+
+bool nsCommandParams::GetBool(const char* aName, ErrorResult& aRv) const {
+  MOZ_ASSERT(!aRv.Failed());
+
+  HashEntry* foundEntry = GetNamedEntry(aName);
+  if (foundEntry && foundEntry->mEntryType == eBooleanType) {
+    return foundEntry->mData.mBoolean;
+  }
+  aRv.Throw(NS_ERROR_FAILURE);
+  return false;
+}
+
+NS_IMETHODIMP
+nsCommandParams::GetLongValue(const char* aName, int32_t* aRetVal) {
+  NS_ENSURE_ARG_POINTER(aRetVal);
+
+  ErrorResult error;
+  *aRetVal = GetInt(aName, error);
+  return error.StealNSResult();
+}
+
+int32_t nsCommandParams::GetInt(const char* aName, ErrorResult& aRv) const {
+  MOZ_ASSERT(!aRv.Failed());
+
+  HashEntry* foundEntry = GetNamedEntry(aName);
+  if (foundEntry && foundEntry->mEntryType == eLongType) {
+    return foundEntry->mData.mLong;
+  }
+  aRv.Throw(NS_ERROR_FAILURE);
+  return 0;
+}
+
+NS_IMETHODIMP
+nsCommandParams::GetDoubleValue(const char* aName, double* aRetVal) {
+  NS_ENSURE_ARG_POINTER(aRetVal);
+
+  ErrorResult error;
+  *aRetVal = GetDouble(aName, error);
+  return error.StealNSResult();
+}
+
+double nsCommandParams::GetDouble(const char* aName, ErrorResult& aRv) const {
+  MOZ_ASSERT(!aRv.Failed());
+
+  HashEntry* foundEntry = GetNamedEntry(aName);
+  if (foundEntry && foundEntry->mEntryType == eDoubleType) {
+    return foundEntry->mData.mDouble;
+  }
+  aRv.Throw(NS_ERROR_FAILURE);
+  return 0.0;
+}
+
+NS_IMETHODIMP
+nsCommandParams::GetStringValue(const char* aName, nsAString& aRetVal) {
+  return GetString(aName, aRetVal);
+}
+
+nsresult nsCommandParams::GetString(const char* aName,
+                                    nsAString& aRetVal) const {
+  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, nsACString& aRetVal) {
+  return GetCString(aName, aRetVal);
+}
+
+nsresult nsCommandParams::GetCString(const char* aName,
+                                     nsACString& aRetVal) const {
+  HashEntry* foundEntry = GetNamedEntry(aName);
+  if (foundEntry && foundEntry->mEntryType == eStringType) {
+    NS_ASSERTION(foundEntry->mData.mCString, "Null string");
+    aRetVal.Assign(*foundEntry->mData.mCString);
+    return NS_OK;
+  }
+  aRetVal.Truncate();
+  return NS_ERROR_FAILURE;
+}
+
+NS_IMETHODIMP
+nsCommandParams::GetISupportsValue(const char* aName, nsISupports** aRetVal) {
+  NS_ENSURE_ARG_POINTER(aRetVal);
+
+  ErrorResult error;
+  nsCOMPtr<nsISupports> result = GetISupports(aName, error);
+  if (result) {
+    result.forget(aRetVal);
+  } else {
+    *aRetVal = nullptr;
+  }
+  return error.StealNSResult();
+}
+
+already_AddRefed<nsISupports> nsCommandParams::GetISupports(
+    const char* aName, ErrorResult& aRv) const {
+  MOZ_ASSERT(!aRv.Failed());
+
+  HashEntry* foundEntry = GetNamedEntry(aName);
+  if (foundEntry && foundEntry->mEntryType == eISupportsType) {
+    nsCOMPtr<nsISupports> result = foundEntry->mISupports;
+    return result.forget();
+  }
+  aRv.Throw(NS_ERROR_FAILURE);
+  return nullptr;
+}
+
+NS_IMETHODIMP
+nsCommandParams::SetBooleanValue(const char* aName, bool aValue) {
+  return SetBool(aName, aValue);
+}
+
+nsresult nsCommandParams::SetBool(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) {
+  return SetInt(aName, aValue);
+}
+
+nsresult nsCommandParams::SetInt(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) {
+  return SetDouble(aName, aValue);
+}
+
+nsresult nsCommandParams::SetDouble(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) {
+  return SetString(aName, aValue);
+}
+
+nsresult nsCommandParams::SetString(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 nsACString& aValue) {
+  return SetCString(aName, aValue);
+}
+
+nsresult nsCommandParams::SetCString(const char* aName,
+                                     const nsACString& 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) {
+  return SetISupports(aName, aValue);
+}
+
+nsresult nsCommandParams::SetISupports(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) const {
+  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) {
+  auto* fromEntry =
+      const_cast<HashEntry*>(static_cast<const HashEntry*>(aFrom));
+  HashEntry* toEntry = static_cast<HashEntry*>(aTo);
+
+  new (KnownNotNull, toEntry) HashEntry(std::move(*fromEntry));
+
+  fromEntry->~HashEntry();
+}
+
+void nsCommandParams::HashClearEntry(PLDHashTable* aTable,
+                                     PLDHashEntryHdr* aEntry) {
+  HashEntry* thisEntry = static_cast<HashEntry*>(aEntry);
+  thisEntry->~HashEntry();
+}