Remove byte-masking macros for Datum conversion macros
As the comment there stated, these were needed for old-style user-defined functions, but since we removed support for those, we don't need this anymore. Reviewed-by: Michael Paquier <michael.paquier@gmail.com>
This commit is contained in:
Peter Eisentraut
parent
6588a43bca
commit
a6ef00b5c3
@ -24,7 +24,7 @@
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* section description
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* ------- ------------------------------------------------
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* 1) variable-length datatypes (TOAST support)
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* 2) datum type + support macros
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* 2) Datum type + support macros
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* 3) exception handling backend support
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*
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* NOTES
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@ -349,60 +349,38 @@ typedef struct
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/* ----------------------------------------------------------------
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* Section 2: datum type + support macros
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* Section 2: Datum type + support macros
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* ----------------------------------------------------------------
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*/
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/*
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* Port Notes:
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* Postgres makes the following assumptions about datatype sizes:
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* A Datum contains either a value of a pass-by-value type or a pointer to a
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* value of a pass-by-reference type. Therefore, we require:
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*
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* sizeof(Datum) == sizeof(void *) == 4 or 8
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* sizeof(char) == 1
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* sizeof(short) == 2
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* sizeof(Datum) == sizeof(void *) == 4 or 8
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*
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* When a type narrower than Datum is stored in a Datum, we place it in the
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* low-order bits and are careful that the DatumGetXXX macro for it discards
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* the unused high-order bits (as opposed to, say, assuming they are zero).
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* This is needed to support old-style user-defined functions, since depending
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* on architecture and compiler, the return value of a function returning char
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* or short may contain garbage when called as if it returned Datum.
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* The macros below and the analogous macros for other types should be used to
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* convert between a Datum and the appropriate C type.
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*/
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typedef uintptr_t Datum;
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#define SIZEOF_DATUM SIZEOF_VOID_P
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typedef Datum *DatumPtr;
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#define GET_1_BYTE(datum) (((Datum) (datum)) & 0x000000ff)
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#define GET_2_BYTES(datum) (((Datum) (datum)) & 0x0000ffff)
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#define GET_4_BYTES(datum) (((Datum) (datum)) & 0xffffffff)
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#if SIZEOF_DATUM == 8
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#define GET_8_BYTES(datum) ((Datum) (datum))
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#endif
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#define SET_1_BYTE(value) (((Datum) (value)) & 0x000000ff)
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#define SET_2_BYTES(value) (((Datum) (value)) & 0x0000ffff)
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#define SET_4_BYTES(value) (((Datum) (value)) & 0xffffffff)
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#if SIZEOF_DATUM == 8
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#define SET_8_BYTES(value) ((Datum) (value))
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#endif
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/*
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* DatumGetBool
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* Returns boolean value of a datum.
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*
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* Note: any nonzero value will be considered TRUE, but we ignore bits to
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* the left of the width of bool, per comment above.
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* Note: any nonzero value will be considered true.
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*/
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#define DatumGetBool(X) ((bool) (GET_1_BYTE(X) != 0))
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#define DatumGetBool(X) ((bool) ((X) != 0))
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/*
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* BoolGetDatum
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* Returns datum representation for a boolean.
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*
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* Note: any nonzero value will be considered TRUE.
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* Note: any nonzero value will be considered true.
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*/
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#define BoolGetDatum(X) ((Datum) ((X) ? 1 : 0))
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@ -412,140 +390,140 @@ typedef Datum *DatumPtr;
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* Returns character value of a datum.
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*/
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#define DatumGetChar(X) ((char) GET_1_BYTE(X))
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#define DatumGetChar(X) ((char) (X))
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/*
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* CharGetDatum
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* Returns datum representation for a character.
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*/
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#define CharGetDatum(X) ((Datum) SET_1_BYTE(X))
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#define CharGetDatum(X) ((Datum) (X))
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/*
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* Int8GetDatum
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* Returns datum representation for an 8-bit integer.
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*/
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#define Int8GetDatum(X) ((Datum) SET_1_BYTE(X))
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#define Int8GetDatum(X) ((Datum) (X))
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/*
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* DatumGetUInt8
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* Returns 8-bit unsigned integer value of a datum.
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*/
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#define DatumGetUInt8(X) ((uint8) GET_1_BYTE(X))
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#define DatumGetUInt8(X) ((uint8) (X))
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/*
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* UInt8GetDatum
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* Returns datum representation for an 8-bit unsigned integer.
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*/
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#define UInt8GetDatum(X) ((Datum) SET_1_BYTE(X))
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#define UInt8GetDatum(X) ((Datum) (X))
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/*
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* DatumGetInt16
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* Returns 16-bit integer value of a datum.
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*/
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#define DatumGetInt16(X) ((int16) GET_2_BYTES(X))
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#define DatumGetInt16(X) ((int16) (X))
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/*
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* Int16GetDatum
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* Returns datum representation for a 16-bit integer.
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*/
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#define Int16GetDatum(X) ((Datum) SET_2_BYTES(X))
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#define Int16GetDatum(X) ((Datum) (X))
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/*
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* DatumGetUInt16
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* Returns 16-bit unsigned integer value of a datum.
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*/
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#define DatumGetUInt16(X) ((uint16) GET_2_BYTES(X))
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#define DatumGetUInt16(X) ((uint16) (X))
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/*
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* UInt16GetDatum
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* Returns datum representation for a 16-bit unsigned integer.
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*/
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#define UInt16GetDatum(X) ((Datum) SET_2_BYTES(X))
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#define UInt16GetDatum(X) ((Datum) (X))
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/*
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* DatumGetInt32
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* Returns 32-bit integer value of a datum.
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*/
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#define DatumGetInt32(X) ((int32) GET_4_BYTES(X))
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#define DatumGetInt32(X) ((int32) (X))
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/*
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* Int32GetDatum
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* Returns datum representation for a 32-bit integer.
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*/
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#define Int32GetDatum(X) ((Datum) SET_4_BYTES(X))
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#define Int32GetDatum(X) ((Datum) (X))
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/*
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* DatumGetUInt32
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* Returns 32-bit unsigned integer value of a datum.
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*/
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#define DatumGetUInt32(X) ((uint32) GET_4_BYTES(X))
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#define DatumGetUInt32(X) ((uint32) (X))
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/*
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* UInt32GetDatum
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* Returns datum representation for a 32-bit unsigned integer.
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*/
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#define UInt32GetDatum(X) ((Datum) SET_4_BYTES(X))
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#define UInt32GetDatum(X) ((Datum) (X))
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/*
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* DatumGetObjectId
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* Returns object identifier value of a datum.
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*/
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#define DatumGetObjectId(X) ((Oid) GET_4_BYTES(X))
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#define DatumGetObjectId(X) ((Oid) (X))
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/*
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* ObjectIdGetDatum
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* Returns datum representation for an object identifier.
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*/
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#define ObjectIdGetDatum(X) ((Datum) SET_4_BYTES(X))
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#define ObjectIdGetDatum(X) ((Datum) (X))
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/*
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* DatumGetTransactionId
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* Returns transaction identifier value of a datum.
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*/
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#define DatumGetTransactionId(X) ((TransactionId) GET_4_BYTES(X))
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#define DatumGetTransactionId(X) ((TransactionId) (X))
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/*
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* TransactionIdGetDatum
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* Returns datum representation for a transaction identifier.
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*/
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#define TransactionIdGetDatum(X) ((Datum) SET_4_BYTES((X)))
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#define TransactionIdGetDatum(X) ((Datum) (X))
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/*
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* MultiXactIdGetDatum
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* Returns datum representation for a multixact identifier.
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*/
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#define MultiXactIdGetDatum(X) ((Datum) SET_4_BYTES((X)))
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#define MultiXactIdGetDatum(X) ((Datum) (X))
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/*
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* DatumGetCommandId
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* Returns command identifier value of a datum.
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*/
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#define DatumGetCommandId(X) ((CommandId) GET_4_BYTES(X))
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#define DatumGetCommandId(X) ((CommandId) (X))
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/*
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* CommandIdGetDatum
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* Returns datum representation for a command identifier.
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*/
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#define CommandIdGetDatum(X) ((Datum) SET_4_BYTES(X))
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#define CommandIdGetDatum(X) ((Datum) (X))
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/*
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* DatumGetPointer
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@ -608,7 +586,7 @@ typedef Datum *DatumPtr;
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*/
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#ifdef USE_FLOAT8_BYVAL
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#define DatumGetInt64(X) ((int64) GET_8_BYTES(X))
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#define DatumGetInt64(X) ((int64) (X))
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#else
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#define DatumGetInt64(X) (* ((int64 *) DatumGetPointer(X)))
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#endif
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@ -622,7 +600,7 @@ typedef Datum *DatumPtr;
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*/
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#ifdef USE_FLOAT8_BYVAL
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#define Int64GetDatum(X) ((Datum) SET_8_BYTES(X))
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#define Int64GetDatum(X) ((Datum) (X))
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#else
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extern Datum Int64GetDatum(int64 X);
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#endif
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@ -635,7 +613,7 @@ extern Datum Int64GetDatum(int64 X);
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*/
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#ifdef USE_FLOAT8_BYVAL
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#define DatumGetUInt64(X) ((uint64) GET_8_BYTES(X))
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#define DatumGetUInt64(X) ((uint64) (X))
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#else
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#define DatumGetUInt64(X) (* ((uint64 *) DatumGetPointer(X)))
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#endif
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@ -649,7 +627,7 @@ extern Datum Int64GetDatum(int64 X);
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*/
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#ifdef USE_FLOAT8_BYVAL
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#define UInt64GetDatum(X) ((Datum) SET_8_BYTES(X))
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#define UInt64GetDatum(X) ((Datum) (X))
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#else
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#define UInt64GetDatum(X) Int64GetDatum((int64) (X))
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#endif
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