404 lines
11 KiB
C
404 lines
11 KiB
C
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/*
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* objkey.h
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*
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* Copyright (c) 1995 by DataBeam Corporation, Lexington, KY
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*
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* Abstract:
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* This is the interface file for the class CObjectKeyContainer. This class
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* manages the data associated with an Object Key. Object Key are used
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* to identify a particular application protocol, whether it is standard or
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* non-standard. When used to identify a standard protocol, the Object Key
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* takes the form of an Object ID which is a series of non-negative
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* integers. This type of Object Key is maintained internally through the
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* use of a UnicodeString object. When used to identify a non-standard
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* protocol, the Object Key takes the form of an H221 non-standard ID which
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* is an octet string of no fewer than four octets and no more than 255
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* octets. In this case the Object Key is maintained internally by using a
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* Rogue Wave string object.
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*
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* Caveats:
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* None.
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*
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* Author:
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* jbo
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*/
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#ifndef _OBJECT_KEY_DATA_
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#define _OBJECT_KEY_DATA_
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/*
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* Macros used by this class.
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*/
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#define MINIMUM_OBJECT_ID_ARCS 3
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#define ITUT_IDENTIFIER 0
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#define ISO_IDENTIFIER 1
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#define JOINT_ISO_ITUT_IDENTIFIER 2
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#define MINIMUM_NON_STANDARD_ID_LENGTH 4
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#define MAXIMUM_NON_STANDARD_ID_LENGTH 255
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/*
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* This is the typedef for the structure used to hold the object key data
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* internally.
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*/
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typedef struct
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{
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LPBYTE object_id_key;
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UINT object_id_length;
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LPOSTR poszNonStandardIDKey;
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}
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OBJECT_KEY;
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/*
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* Class definition:
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*/
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class CObjectKeyContainer : public CRefCount
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{
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public:
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CObjectKeyContainer(PGCCObjectKey, PGCCError);
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CObjectKeyContainer(PKey, PGCCError);
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CObjectKeyContainer(CObjectKeyContainer *, PGCCError);
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~CObjectKeyContainer(void);
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UINT LockObjectKeyData(void);
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void UnLockObjectKeyData(void);
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UINT GetGCCObjectKeyData(PGCCObjectKey, LPBYTE memory);
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GCCError GetObjectKeyDataPDU(PKey);
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void FreeObjectKeyDataPDU(void);
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friend BOOL operator== (const CObjectKeyContainer&, const CObjectKeyContainer&);
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protected:
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OBJECT_KEY m_InternalObjectKey;
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UINT m_cbDataSize;
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Key m_ObjectKeyPDU;
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BOOL m_fValidObjectKeyPDU;
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private:
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BOOL ValidateObjectIdValues(UINT first_arc, UINT second_arc);
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};
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/*
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* Comments explaining the public and protected class member functions
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*/
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/*
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* CObjectKeyContainer ( PGCCObjectKey object_key,
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* PGCCError return_value);
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*
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* Public member function of CObjectKeyContainer.
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*
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* Function Description:
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* This is the constructor for the CObjectKeyContainer class which takes as
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* input the "API" version of object key data, GCCObjectKey.
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*
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* Formal Parameters:
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* object_key (i) The object key data to store.
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* return_value (o) The output parameter used to indicate errors.
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*
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* Return Value:
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* GCC_NO_ERROR - No error.
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* GCC_ALLOCATION_FAILURE - Error creating an object using the
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* "new" operator.
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* GCC_BAD_OBJECT_KEY - An invalid object key passed in.
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*
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* Side Effects:
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* None.
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*
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* Caveats:
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* None.
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*/
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/*
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* CObjectKeyContainer ( PKey object_key,
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* PGCCError return_value);
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*
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* Public member function of CObjectKeyContainer.
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*
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* Function Description:
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* This is the constructor for the CObjectKeyContainer class which takes as
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* input the "PDU" version of object key data, Key.
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*
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* Formal Parameters:
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* object_key (i) The object key data to store.
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* return_value (o) The output parameter used to indicate errors.
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*
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* Return Value:
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* GCC_NO_ERROR - No error.
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* GCC_ALLOCATION_FAILURE - Error creating an object using the
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* "new" operator.
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*
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* Side Effects:
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* None.
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*
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* Caveats:
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* None.
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*/
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/*
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* CObjectKeyContainer ( CObjectKeyContainer *object_key,
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* PGCCError return_value);
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*
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* Public member function of CObjectKeyContainer.
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*
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* Function Description:
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* This is the copy constructor for the CObjectKeyContainer class which takes
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* as input another CObjectKeyContainer object.
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*
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* Formal Parameters:
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* object_key (i) The CObjectKeyContainer object to copy.
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* return_value (o) The output parameter used to indicate errors.
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*
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* Return Value:
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* GCC_NO_ERROR - No error.
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* GCC_ALLOCATION_FAILURE - Error creating an object using the
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* "new" operator.
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* GCC_BAD_OBJECT_KEY - An invalid CObjectKeyContainer passed in.
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*
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* Side Effects:
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* None.
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*
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* Caveats:
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* None.
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*/
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/*
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* ~ObjectKeyData();
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*
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* Public member function of CObjectKeyContainer.
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*
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* Function Description:
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* This is the destructor for the CObjectKeyContainer class. It is used to
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* clean up any memory allocated during the life of this object.
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*
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* Formal Parameters:
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* None.
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*
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* Return Value:
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* None.
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*
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* Side Effects:
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* None.
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*
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* Caveats:
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* None.
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*/
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/*
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* UINT LockObjectKeyData ();
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*
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* Public member function of CObjectKeyContainer.
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*
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* Function Description:
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* This routine is used to "lock" the "API" data for this object. This
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* results in the lock count for this object being incremented. When the
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* lock count transitions from 0 to 1, a calculation is made to determine
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* how much memory will be needed to hold any "API" data which will
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* be referenced by, but not held in, the GCCObjectKey structure
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* which is filled in on a call to GetGCCObjectKeyData. This is the
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* value returned by this routine in order to allow the calling object to
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* allocate that amount of memory in preparation for the call to
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* GetGCCObjectKeyData.
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*
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* Formal Parameters:
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* None.
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*
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* Return Value:
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* The amount of memory, if any, which will be needed to hold "API" data
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* which is referenced by, but not held in, the GCCObjectKey structure
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* provided as an output parameter to the GetGCCObjectKeyData call.
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*
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* Side Effects:
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* The internal lock count is incremented.
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*
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* Caveats:
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* The internal lock count is used in conjuction with an internal "free"
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* flag as a mechanism for ensuring that this object remains in existance
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* until all interested parties are through with it. The object remains
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* valid (unless explicity deleted) until the lock count is zero and the
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* "free" flag is set through a call to FreeObjectKeyData. This allows
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* other objects to lock this object and be sure that it remains valid
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* until they call UnLock which will decrement the internal lock count. A
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* typical usage scenerio for this object would be: An CObjectKeyContainer
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* object is constructed and then passed off to any interested parties
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* through a function call. On return from the function call, the
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* FreeObjectKeyData call is made which will set the internal "free"
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* flag. If no other parties have locked the object with a Lock call,
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* then the CObjectKeyContainer object will automatically delete itself when
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* the FreeObjectKeyData call is made. If, however, any number of
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* other parties has locked the object, it will remain in existence until
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* each of them has unlocked the object through a call to UnLock.
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*/
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/*
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* UINT GetGCCObjectKeyData (
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* PGCCObjectKey object_key,
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* LPSTR memory);
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*
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* Public member function of CObjectKeyContainer.
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*
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* Function Description:
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* This routine is used to retrieve the object key data from the
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* CObjectKeyContainer object in the "API" form of a GCCObjectKey.
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*
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* Formal Parameters:
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* object_key (o) The GCCObjectKey structure to fill in.
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* memory (o) The memory used to hold any data referenced by,
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* but not held in, the output structure.
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*
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* Return Value:
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* The amount of data, if any, written into the bulk memory block provided.
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*
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* Side Effects:
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* None.
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*
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* Caveats:
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* None.
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*/
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/*
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* void UnLockObjectKeyData ();
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*
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* Public member function of CObjectKeyContainer.
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*
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* Function Description:
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* This routine is used to "unlock" the "API" data for this object. This
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* results in the lock count for this object being decremented. When the
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* lock count transitions from 1 to 0, a check is made to determine
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* whether the object has been freed through a call to
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* FreeObjectKeyData. If so, the object will automatically delete
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* itself.
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*
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* Formal Parameters:
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* None.
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*
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* Return Value:
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* None.
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*
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* Side Effects:
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* The internal lock count is decremented.
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*
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* Caveats:
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* It is the responsibility of any party which locks an CObjectKeyContainer
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* object by calling Lock to also unlock the object with a call to UnLock.
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* If the party calling UnLock did not construct the CObjectKeyContainer
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* object, it should assume the object to be invalid thereafter.
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*/
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/*
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* void FreeObjectKeyData ();
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*
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* Public member function of CObjectKeyContainer.
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*
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* Function Description:
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* This routine is used to "free" the "API" data for this object. This
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* will result in the automatic deletion of this object if the object is
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* not in the "locked" state.
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*
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* Formal Parameters:
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* None.
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*
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* Return Value:
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* None.
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*
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* Side Effects:
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* The internal "free" flag is set.
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*
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* Caveats:
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* This object should be assumed invalid after a call to
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* FreeObjectKeyData has been made.
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*/
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/*
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* GCCError GetObjectKeyDataPDU (
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* PKey object_key);
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*
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* Public member function of CObjectKeyContainer.
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*
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* Function Description:
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* This routine is used to retrieve the object key data from the
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* CObjectKeyContainer object in the "PDU" form of a Key.
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*
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* Formal Parameters:
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* object_key (o) The Key structure to fill in.
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*
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* Return Value:
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* GCC_NO_ERROR - No error.
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* GCC_ALLOCATION_FAILURE - Error creating an object using the
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* "new" operator.
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* GCC_BAD_OBJECT_KEY - One of the internal pointers has
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* been corrupted.
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*
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* Side Effects:
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* None.
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*
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* Caveats:
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* None.
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*/
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/*
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* void FreeObjectKeyDataPDU ();
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*
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* Public member function of CObjectKeyContainer.
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*
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* Function Description:
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* This routine is used to "free" the "PDU" data allocated for this object
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* which is held internally in a Key structure.
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*
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* Formal Parameters:
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* None.
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*
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* Return Value:
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* None.
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*
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* Side Effects:
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* The internal flag is set to indicate that the PDU form of data no
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* longer is valid for this object.
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*
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* Caveats:
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* None.
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*/
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/*
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* friend BOOL operator== (const CObjectKeyContainer& object_key_1,
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* const CObjectKeyContainer& object_key_2);
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*
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* Public member function of CObjectKeyContainer.
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*
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* Function Description:
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* This routine is used to compare two CObjectKeyContainer objects to determine
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* whether or not they are equal in value.
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*
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* Formal Parameters:
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* object_key_1 (i) The first CObjectKeyContainer object to compare.
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* object_key_2 (i) The other CObjectKeyContainer object to compare.
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*
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* Return Value:
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* TRUE - The two objects are equal in value.
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* FALSE - The two objects are not equal in value.
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*
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* Side Effects:
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* None.
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*
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* Caveats:
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* None.
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*/
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#endif
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