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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* 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 "mozilla/ArrayUtils.h"
#include "nsHTMLEntities.h"
#include "nsString.h"
#include "nsCRT.h"
#include "PLDHashTable.h"
using namespace mozilla;
struct EntityNode {
const char* mStr; // never owns buffer
int32_t mUnicode;
};
struct EntityNodeEntry : public PLDHashEntryHdr
{
const EntityNode* node;
};
static bool matchNodeString(const PLDHashEntryHdr* aHdr, const void* key)
{
const EntityNodeEntry* entry = static_cast<const EntityNodeEntry*>(aHdr);
const char* str = static_cast<const char*>(key);
return (nsCRT::strcmp(entry->node->mStr, str) == 0);
}
static bool matchNodeUnicode(const PLDHashEntryHdr* aHdr, const void* key)
{
const EntityNodeEntry* entry = static_cast<const EntityNodeEntry*>(aHdr);
const int32_t ucode = NS_PTR_TO_INT32(key);
return (entry->node->mUnicode == ucode);
}
static PLDHashNumber hashUnicodeValue(const void* key)
{
// key is actually the unicode value
return PLDHashNumber(NS_PTR_TO_INT32(key));
}
static const PLDHashTableOps EntityToUnicodeOps = {
PLDHashTable::HashStringKey,
matchNodeString,
PLDHashTable::MoveEntryStub,
PLDHashTable::ClearEntryStub,
nullptr,
};
static const PLDHashTableOps UnicodeToEntityOps = {
hashUnicodeValue,
matchNodeUnicode,
PLDHashTable::MoveEntryStub,
PLDHashTable::ClearEntryStub,
nullptr,
};
static PLDHashTable* gEntityToUnicode;
static PLDHashTable* gUnicodeToEntity;
static nsrefcnt gTableRefCnt = 0;
#define HTML_ENTITY(_name, _value) { #_name, _value },
static const EntityNode gEntityArray[] = {
#include "nsHTMLEntityList.h"
};
#undef HTML_ENTITY
#define NS_HTML_ENTITY_COUNT ((int32_t)ArrayLength(gEntityArray))
nsresult
nsHTMLEntities::AddRefTable(void)
{
if (!gTableRefCnt) {
gEntityToUnicode = new PLDHashTable(&EntityToUnicodeOps,
sizeof(EntityNodeEntry),
NS_HTML_ENTITY_COUNT);
gUnicodeToEntity = new PLDHashTable(&UnicodeToEntityOps,
sizeof(EntityNodeEntry),
NS_HTML_ENTITY_COUNT);
for (const EntityNode *node = gEntityArray,
*node_end = ArrayEnd(gEntityArray);
node < node_end; ++node) {
// add to Entity->Unicode table
auto entry = static_cast<EntityNodeEntry*>
(gEntityToUnicode->Add(node->mStr, fallible));
NS_ASSERTION(entry, "Error adding an entry");
// Prefer earlier entries when we have duplication.
if (!entry->node)
entry->node = node;
// add to Unicode->Entity table
entry = static_cast<EntityNodeEntry*>
(gUnicodeToEntity->Add(NS_INT32_TO_PTR(node->mUnicode),
fallible));
NS_ASSERTION(entry, "Error adding an entry");
// Prefer earlier entries when we have duplication.
if (!entry->node)
entry->node = node;
}
#ifdef DEBUG
gUnicodeToEntity->MarkImmutable();
gEntityToUnicode->MarkImmutable();
#endif
}
++gTableRefCnt;
return NS_OK;
}
void
nsHTMLEntities::ReleaseTable(void)
{
if (--gTableRefCnt != 0) {
return;
}
delete gEntityToUnicode;
delete gUnicodeToEntity;
gEntityToUnicode = nullptr;
gUnicodeToEntity = nullptr;
}
int32_t
nsHTMLEntities::EntityToUnicode(const nsCString& aEntity)
{
NS_ASSERTION(gEntityToUnicode, "no lookup table, needs addref");
if (!gEntityToUnicode) {
return -1;
}
//this little piece of code exists because entities may or may not have the terminating ';'.
//if we see it, strip if off for this test...
if(';'==aEntity.Last()) {
nsAutoCString temp(aEntity);
temp.Truncate(aEntity.Length()-1);
return EntityToUnicode(temp);
}
auto entry =
static_cast<EntityNodeEntry*>(gEntityToUnicode->Search(aEntity.get()));
return entry ? entry->node->mUnicode : -1;
}
int32_t
nsHTMLEntities::EntityToUnicode(const nsAString& aEntity) {
nsAutoCString theEntity; theEntity.AssignWithConversion(aEntity);
if(';'==theEntity.Last()) {
theEntity.Truncate(theEntity.Length()-1);
}
return EntityToUnicode(theEntity);
}
const char*
nsHTMLEntities::UnicodeToEntity(int32_t aUnicode)
{
NS_ASSERTION(gUnicodeToEntity, "no lookup table, needs addref");
auto entry =
static_cast<EntityNodeEntry*>
(gUnicodeToEntity->Search(NS_INT32_TO_PTR(aUnicode)));
return entry ? entry->node->mStr : nullptr;
}
#ifdef DEBUG
#include <stdio.h>
class nsTestEntityTable {
public:
nsTestEntityTable() {
int32_t value;
nsHTMLEntities::AddRefTable();
// Make sure we can find everything we are supposed to
for (int i = 0; i < NS_HTML_ENTITY_COUNT; ++i) {
nsAutoString entity; entity.AssignWithConversion(gEntityArray[i].mStr);
value = nsHTMLEntities::EntityToUnicode(entity);
NS_ASSERTION(value != -1, "can't find entity");
NS_ASSERTION(value == gEntityArray[i].mUnicode, "bad unicode value");
entity.AssignWithConversion(nsHTMLEntities::UnicodeToEntity(value));
NS_ASSERTION(entity.EqualsASCII(gEntityArray[i].mStr), "bad entity name");
}
// Make sure we don't find things that aren't there
value = nsHTMLEntities::EntityToUnicode(nsAutoCString("@"));
NS_ASSERTION(value == -1, "found @");
value = nsHTMLEntities::EntityToUnicode(nsAutoCString("zzzzz"));
NS_ASSERTION(value == -1, "found zzzzz");
nsHTMLEntities::ReleaseTable();
}
};
//nsTestEntityTable validateEntityTable;
#endif
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