| title | CMapPtrToPtr Class | Microsoft Docs | ||||||||||||||||
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| ms.date | 11/04/2016 | ||||||||||||||||
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| ms.topic | reference | ||||||||||||||||
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| ms.assetid | 23cbbaec-9d64-48f2-92ae-5e24fa64b926 | ||||||||||||||||
| caps.latest.revision | 22 | ||||||||||||||||
| author | mikeblome | ||||||||||||||||
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Supports maps of void pointers keyed by void pointers.
class CMapPtrToPtr : public CObject
The member functions of CMapPtrToPtr are similar to the member functions of class CMapStringToOb. Because of this similarity, you can use the CMapStringToOb reference documentation for member function specifics. Wherever you see a CObject pointer as a function parameter or return value, substitute a pointer to void. Wherever you see a CString or a const pointer to char as a function parameter or return value, substitute a pointer to void.
BOOL CMapStringToOb::Lookup( const char* <key>,
CObject*& <rValue> ) const;
for example, translates to
BOOL CMapPtrToPtr::Lookup( void* <key>, void*& <rValue> ) const;
| Name | Description |
|---|---|
| CMapStringToOb::CMapStringToOb | Constructor. |
| Name | Description |
|---|---|
| CMapStringToOb::GetCount | Returns the number of elements in this map. |
| CMapStringToOb::GetHashTableSize | Determines the current number of elements in the hash table. |
| CMapStringToOb::GetNextAssoc | Gets the next element for iterating. |
| CMapStringToOb::GetSize | Returns the number of elements in this map. |
| CMapStringToOb::GetStartPosition | Returns the position of the first element. |
| CMapStringToOb::HashKey | Calculates the hash value of a specified key. |
| CMapStringToOb::InitHashTable | Initializes the hash table. |
| CMapStringToOb::IsEmpty | Tests for the empty-map condition (no elements). |
| CMapStringToOb::Lookup | Looks up a void pointer based on the void pointer key. The pointer value, not the entity it points to, is used for the key comparison. |
| CMapStringToOb::LookupKey | Returns a reference to the key associated with the specified key value. |
| CMapStringToOb::RemoveAll | Removes all the elements from this map. |
| CMapStringToOb::RemoveKey | Removes an element specified by a key. |
| CMapStringToOb::SetAt | Inserts an element into the map; replaces an existing element if a matching key is found. |
| Name | Description |
|---|---|
| CMapStringToOb::operator [ ] | Inserts an element into the map — operator substitution for SetAt. |
CMapPtrToPtr incorporates the IMPLEMENT_DYNAMIC macro to support run-time type access and dumping to a CDumpContext object. If you need a dump of individual map elements (pointer values), you must set the depth of the dump context to 1 or greater.
Pointer-to-pointer maps may not be serialized.
When a CMapPtrToPtr object is deleted, or when its elements are removed, only the pointers are removed, not the entities they reference.
For more information on CMapPtrToPtr, see the article Collections.
CMapPtrToPtr
Header: afxcoll.h