The Tor Browser: embedding/components/commandhandler/src/nsCommandParams.h@6474c204b198

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

     1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

     2 /* This Source Code Form is subject to the terms of the Mozilla Public

     3  * License, v. 2.0. If a copy of the MPL was not distributed with this

     4  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

     7 #ifndef nsCommandParams_h__

     8 #define nsCommandParams_h__

    10 #include "nsString.h"

    11 #include "nsICommandParams.h"

    12 #include "nsCOMPtr.h"

    13 #include "pldhash.h"

    17 class nsCommandParams : public nsICommandParams

    18 {

    19 public:

    21                       nsCommandParams();

    22   virtual             ~nsCommandParams();

    25   NS_DECL_ISUPPORTS

    26   NS_DECL_NSICOMMANDPARAMS

    28   nsresult            Init();

    30 protected:

    32   struct HashEntry : public PLDHashEntryHdr

    33   {

    34     nsCString      mEntryName;

    36     uint8_t       mEntryType;

    37     union {

    39       bool                    mBoolean;

    40       int32_t                 mLong;

    41       double                  mDouble;

    42       nsString*               mString;

    43       nsCString*              mCString;

    44     } mData;

    46     nsCOMPtr<nsISupports>   mISupports;

    48     HashEntry(uint8_t inType, const char * inEntryName)

    49     : mEntryName(inEntryName)

    50     , mEntryType(inType)

    51     {

    52       memset(&mData, 0, sizeof(mData));

    53       Reset(mEntryType);

    54     }

    56     HashEntry(const HashEntry& inRHS)

    57     : mEntryType(inRHS.mEntryType)

    58     {

    59       Reset(mEntryType);

    60       switch (mEntryType)

    61       {

    62         case eBooleanType:      mData.mBoolean = inRHS.mData.mBoolean;  break;

    63         case eLongType:         mData.mLong    = inRHS.mData.mLong;     break;

    64         case eDoubleType:       mData.mDouble  = inRHS.mData.mDouble;   break;

    65         case eWStringType:

    66           NS_ASSERTION(inRHS.mData.mString, "Source entry has no string");

    67           mData.mString = new nsString(*inRHS.mData.mString);

    68           break;

    69         case eStringType:

    70           NS_ASSERTION(inRHS.mData.mCString, "Source entry has no string");

    71           mData.mCString = new nsCString(*inRHS.mData.mCString);

    72           break;

    73         case eISupportsType:

    74           mISupports = inRHS.mISupports.get();    // additional addref

    75           break;

    76         default:

    77           NS_ERROR("Unknown type");

    78       }

    79     }

    81     ~HashEntry()

    82     {

    83       if (mEntryType == eWStringType)

    84         delete mData.mString;

    85       else if (mEntryType == eStringType)

    86         delete mData.mCString;

    87     }

    89     void Reset(uint8_t inNewType)

    90     {

    91       switch (mEntryType)

    92       {

    93         case eNoType:                                       break;

    94         case eBooleanType:      mData.mBoolean = false;  break;

    95         case eLongType:         mData.mLong = 0;            break;

    96         case eDoubleType:       mData.mDouble = 0.0;        break;

    97         case eWStringType:      delete mData.mString; mData.mString = nullptr;     break;

    98         case eISupportsType:    mISupports = nullptr;        break;    // clear the nsCOMPtr

    99         case eStringType:       delete mData.mCString; mData.mCString = nullptr;   break;

   100         default:

   101           NS_ERROR("Unknown type");

   102       }

   104       mEntryType = inNewType;

   105     }

   107   };

   110   HashEntry*          GetNamedEntry(const char * name);

   111   HashEntry*          GetIndexedEntry(int32_t index);

   112   uint32_t            GetNumEntries();

   114   nsresult            GetOrMakeEntry(const char * name, uint8_t entryType, HashEntry*& outEntry);

   116 protected:

   118   static PLDHashNumber HashKey(PLDHashTable *table, const void *key);

   120   static bool          HashMatchEntry(PLDHashTable *table,

   121                                       const PLDHashEntryHdr *entry, const void *key);

   123   static void          HashMoveEntry(PLDHashTable *table, const PLDHashEntryHdr *from,

   124                                      PLDHashEntryHdr *to);

   126   static void          HashClearEntry(PLDHashTable *table, PLDHashEntryHdr *entry);

   129 protected:

   131   enum {

   132     eNumEntriesUnknown      = -1

   133   };

   135   // this is going to have to use a pldhash, because we need to

   136   // be able to iterate through entries, passing names back

   137   // to the caller, which means that we need to store the names

   138   // internally.

   140   PLDHashTable    mValuesHash;

   142   // enumerator data

   143   int32_t         mCurEntry;

   144   int32_t         mNumEntries;      // number of entries at start of enumeration (-1 indicates not known)

   146   static const PLDHashTableOps    sHashOps;

   147 };

   150 #endif // nsCommandParams_h__

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