зеркало из https://github.com/mozilla/gecko-dev.git
108 строки
2.7 KiB
C++
108 строки
2.7 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "mozilla/ArrayUtils.h"
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#include "nsHTMLEntities.h"
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#include "nsString.h"
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#include "nsCRT.h"
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#include "PLDHashTable.h"
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using namespace mozilla;
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struct EntityNode {
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const char* mStr; // never owns buffer
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int32_t mUnicode;
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};
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struct EntityNodeEntry : public PLDHashEntryHdr
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{
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const EntityNode* node;
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};
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static bool matchNodeUnicode(const PLDHashEntryHdr* aHdr, const void* key)
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{
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const EntityNodeEntry* entry = static_cast<const EntityNodeEntry*>(aHdr);
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const int32_t ucode = NS_PTR_TO_INT32(key);
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return (entry->node->mUnicode == ucode);
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}
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static PLDHashNumber hashUnicodeValue(const void* key)
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{
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// key is actually the unicode value
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return HashGeneric(key);
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}
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static const PLDHashTableOps UnicodeToEntityOps = {
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hashUnicodeValue,
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matchNodeUnicode,
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PLDHashTable::MoveEntryStub,
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PLDHashTable::ClearEntryStub,
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nullptr,
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};
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static PLDHashTable* gUnicodeToEntity;
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static nsrefcnt gTableRefCnt = 0;
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#define HTML_ENTITY(_name, _value) { #_name, _value },
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static const EntityNode gEntityArray[] = {
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#include "nsHTMLEntityList.h"
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};
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#undef HTML_ENTITY
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#define NS_HTML_ENTITY_COUNT ((int32_t)ArrayLength(gEntityArray))
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nsresult
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nsHTMLEntities::AddRefTable(void)
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{
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if (!gTableRefCnt) {
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gUnicodeToEntity = new PLDHashTable(&UnicodeToEntityOps,
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sizeof(EntityNodeEntry),
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NS_HTML_ENTITY_COUNT);
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for (const EntityNode *node = gEntityArray,
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*node_end = ArrayEnd(gEntityArray);
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node < node_end; ++node) {
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// add to Unicode->Entity table
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auto entry =
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static_cast<EntityNodeEntry*>
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(gUnicodeToEntity->Add(NS_INT32_TO_PTR(node->mUnicode), fallible));
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NS_ASSERTION(entry, "Error adding an entry");
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// Prefer earlier entries when we have duplication.
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if (!entry->node)
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entry->node = node;
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}
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#ifdef DEBUG
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gUnicodeToEntity->MarkImmutable();
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#endif
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}
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++gTableRefCnt;
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return NS_OK;
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}
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void
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nsHTMLEntities::ReleaseTable(void)
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{
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if (--gTableRefCnt != 0) {
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return;
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}
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delete gUnicodeToEntity;
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gUnicodeToEntity = nullptr;
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}
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const char*
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nsHTMLEntities::UnicodeToEntity(int32_t aUnicode)
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{
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NS_ASSERTION(gUnicodeToEntity, "no lookup table, needs addref");
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auto entry =
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static_cast<EntityNodeEntry*>
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(gUnicodeToEntity->Search(NS_INT32_TO_PTR(aUnicode)));
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return entry ? entry->node->mStr : nullptr;
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}
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