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📁 ..
📄 amapi.h(6.3 KB)
📄 amvalidate.h(1.19 KB)
📄 attnum.h(1.52 KB)
📄 brin.h(948 B)
📄 brin_internal.h(3.3 KB)
📄 brin_page.h(2.68 KB)
📄 brin_pageops.h(1.28 KB)
📄 brin_revmap.h(1.23 KB)
📄 brin_tuple.h(3.05 KB)
📄 brin_xlog.h(3.28 KB)
📄 clog.h(1.54 KB)
📄 commit_ts.h(2.09 KB)
📄 genam.h(7.31 KB)
📄 generic_xlog.h(1.42 KB)
📄 gin.h(2.3 KB)
📄 gin_private.h(33.12 KB)
📄 gist.h(6.51 KB)
📄 gist_private.h(19.82 KB)
📄 gistscan.h(729 B)
📄 hash.h(13.54 KB)
📄 heapam.h(7.76 KB)
📄 heapam_xlog.h(12.61 KB)
📄 hio.h(1.26 KB)
📄 htup.h(3.16 KB)
📄 htup_details.h(28.31 KB)
📄 itup.h(4.36 KB)
📄 multixact.h(5.13 KB)
📄 nbtree.h(30.22 KB)
📄 parallel.h(2.28 KB)
📄 printtup.h(1.03 KB)
📄 reloptions.h(8.88 KB)
📄 relscan.h(5.63 KB)
📄 rewriteheap.h(1.79 KB)
📄 rmgr.h(609 B)
📄 rmgrlist.h(2.97 KB)
📄 sdir.h(1.43 KB)
📄 skey.h(6.26 KB)
📄 slru.h(5.49 KB)
📄 spgist.h(7.04 KB)
📄 spgist_private.h(21.82 KB)
📄 stratnum.h(2.67 KB)
📄 subtrans.h(973 B)
📄 sysattr.h(890 B)
📄 timeline.h(1.59 KB)
📄 transam.h(6.29 KB)
📄 tsmapi.h(2.55 KB)
📄 tupconvert.h(1.4 KB)
📄 tupdesc.h(4.36 KB)
📄 tupmacs.h(7.16 KB)
📄 tuptoaster.h(7.18 KB)
📄 twophase.h(1.82 KB)
📄 twophase_rmgr.h(1.24 KB)
📄 valid.h(1.4 KB)
📄 visibilitymap.h(1.77 KB)
📄 xact.h(12.29 KB)
📄 xlog.h(10.91 KB)
📄 xlog_fn.h(1.41 KB)
📄 xlog_internal.h(10.29 KB)
📄 xlogdefs.h(3.11 KB)
📄 xloginsert.h(2.28 KB)
📄 xlogreader.h(7.11 KB)
📄 xlogrecord.h(7.76 KB)
📄 xlogutils.h(1.76 KB)

Editing: tupmacs.h

/*-------------------------------------------------------------------------
 *
 * tupmacs.h
 *	  Tuple macros used by both index tuples and heap tuples.
 *
 *
 * Portions Copyright (c) 1996-2016, PostgreSQL Global Development Group
 * Portions Copyright (c) 1994, Regents of the University of California
 *
 * src/include/access/tupmacs.h
 *
 *-------------------------------------------------------------------------
 */
#ifndef TUPMACS_H
#define TUPMACS_H

/*
 * check to see if the ATT'th bit of an array of 8-bit bytes is set.
 */
#define att_isnull(ATT, BITS) (!((BITS)[(ATT) >> 3] & (1 << ((ATT) & 0x07))))

/*
 * Given a Form_pg_attribute and a pointer into a tuple's data area,
 * return the correct value or pointer.
 *
 * We return a Datum value in all cases.  If the attribute has "byval" false,
 * we return the same pointer into the tuple data area that we're passed.
 * Otherwise, we return the correct number of bytes fetched from the data
 * area and extended to Datum form.
 *
 * On machines where Datum is 8 bytes, we support fetching 8-byte byval
 * attributes; otherwise, only 1, 2, and 4-byte values are supported.
 *
 * Note that T must already be properly aligned for this to work correctly.
 */
#define fetchatt(A,T) fetch_att(T, (A)->attbyval, (A)->attlen)

/*
 * Same, but work from byval/len parameters rather than Form_pg_attribute.
 */
#if SIZEOF_DATUM == 8

#define fetch_att(T,attbyval,attlen) \
( \
	(attbyval) ? \
	( \
		(attlen) == (int) sizeof(Datum) ? \
			*((Datum *)(T)) \
		: \
	  ( \
		(attlen) == (int) sizeof(int32) ? \
			Int32GetDatum(*((int32 *)(T))) \
		: \
		( \
			(attlen) == (int) sizeof(int16) ? \
				Int16GetDatum(*((int16 *)(T))) \
			: \
			( \
				AssertMacro((attlen) == 1), \
				CharGetDatum(*((char *)(T))) \
			) \
		) \
	  ) \
	) \
	: \
	PointerGetDatum((char *) (T)) \
)
#else							/* SIZEOF_DATUM != 8 */

#define fetch_att(T,attbyval,attlen) \
( \
	(attbyval) ? \
	( \
		(attlen) == (int) sizeof(int32) ? \
			Int32GetDatum(*((int32 *)(T))) \
		: \
		( \
			(attlen) == (int) sizeof(int16) ? \
				Int16GetDatum(*((int16 *)(T))) \
			: \
			( \
				AssertMacro((attlen) == 1), \
				CharGetDatum(*((char *)(T))) \
			) \
		) \
	) \
	: \
	PointerGetDatum((char *) (T)) \
)
#endif   /* SIZEOF_DATUM == 8 */

/*
 * att_align_datum aligns the given offset as needed for a datum of alignment
 * requirement attalign and typlen attlen.  attdatum is the Datum variable
 * we intend to pack into a tuple (it's only accessed if we are dealing with
 * a varlena type).  Note that this assumes the Datum will be stored as-is;
 * callers that are intending to convert non-short varlena datums to short
 * format have to account for that themselves.
 */
#define att_align_datum(cur_offset, attalign, attlen, attdatum) \
( \
	((attlen) == -1 && VARATT_IS_SHORT(DatumGetPointer(attdatum))) ? \
	(uintptr_t) (cur_offset) : \
	att_align_nominal(cur_offset, attalign) \
)

/*
 * att_align_pointer performs the same calculation as att_align_datum,
 * but is used when walking a tuple.  attptr is the current actual data
 * pointer; when accessing a varlena field we have to "peek" to see if we
 * are looking at a pad byte or the first byte of a 1-byte-header datum.
 * (A zero byte must be either a pad byte, or the first byte of a correctly
 * aligned 4-byte length word; in either case we can align safely.  A non-zero
 * byte must be either a 1-byte length word, or the first byte of a correctly
 * aligned 4-byte length word; in either case we need not align.)
 *
 * Note: some callers pass a "char *" pointer for cur_offset.  This is
 * a bit of a hack but should work all right as long as uintptr_t is the
 * correct width.
 */
#define att_align_pointer(cur_offset, attalign, attlen, attptr) \
( \
	((attlen) == -1 && VARATT_NOT_PAD_BYTE(attptr)) ? \
	(uintptr_t) (cur_offset) : \
	att_align_nominal(cur_offset, attalign) \
)

/*
 * att_align_nominal aligns the given offset as needed for a datum of alignment
 * requirement attalign, ignoring any consideration of packed varlena datums.
 * There are three main use cases for using this macro directly:
 *	* we know that the att in question is not varlena (attlen != -1);
 *	  in this case it is cheaper than the above macros and just as good.
 *	* we need to estimate alignment padding cost abstractly, ie without
 *	  reference to a real tuple.  We must assume the worst case that
 *	  all varlenas are aligned.
 *	* within arrays, we unconditionally align varlenas (XXX this should be
 *	  revisited, probably).
 *
 * The attalign cases are tested in what is hopefully something like their
 * frequency of occurrence.
 */
#define att_align_nominal(cur_offset, attalign) \
( \
	((attalign) == 'i') ? INTALIGN(cur_offset) : \
	 (((attalign) == 'c') ? (uintptr_t) (cur_offset) : \
	  (((attalign) == 'd') ? DOUBLEALIGN(cur_offset) : \
	   ( \
			AssertMacro((attalign) == 's'), \
			SHORTALIGN(cur_offset) \
	   ))) \
)

/*
 * att_addlength_datum increments the given offset by the space needed for
 * the given Datum variable.  attdatum is only accessed if we are dealing
 * with a variable-length attribute.
 */
#define att_addlength_datum(cur_offset, attlen, attdatum) \
	att_addlength_pointer(cur_offset, attlen, DatumGetPointer(attdatum))

/*
 * att_addlength_pointer performs the same calculation as att_addlength_datum,
 * but is used when walking a tuple --- attptr is the pointer to the field
 * within the tuple.
 *
 * Note: some callers pass a "char *" pointer for cur_offset.  This is
 * actually perfectly OK, but probably should be cleaned up along with
 * the same practice for att_align_pointer.
 */
#define att_addlength_pointer(cur_offset, attlen, attptr) \
( \
	((attlen) > 0) ? \
	( \
		(cur_offset) + (attlen) \
	) \
	: (((attlen) == -1) ? \
	( \
		(cur_offset) + VARSIZE_ANY(attptr) \
	) \
	: \
	( \
		AssertMacro((attlen) == -2), \
		(cur_offset) + (strlen((char *) (attptr)) + 1) \
	)) \
)

/*
 * store_att_byval is a partial inverse of fetch_att: store a given Datum
 * value into a tuple data area at the specified address.  However, it only
 * handles the byval case, because in typical usage the caller needs to
 * distinguish by-val and by-ref cases anyway, and so a do-it-all macro
 * wouldn't be convenient.
 */
#if SIZEOF_DATUM == 8

#define store_att_byval(T,newdatum,attlen) \
	do { \
		switch (attlen) \
		{ \
			case sizeof(char): \
				*(char *) (T) = DatumGetChar(newdatum); \
				break; \
			case sizeof(int16): \
				*(int16 *) (T) = DatumGetInt16(newdatum); \
				break; \
			case sizeof(int32): \
				*(int32 *) (T) = DatumGetInt32(newdatum); \
				break; \
			case sizeof(Datum): \
				*(Datum *) (T) = (newdatum); \
				break; \
			default: \
				elog(ERROR, "unsupported byval length: %d", \
					 (int) (attlen)); \
				break; \
		} \
	} while (0)
#else							/* SIZEOF_DATUM != 8 */

#define store_att_byval(T,newdatum,attlen) \
	do { \
		switch (attlen) \
		{ \
			case sizeof(char): \
				*(char *) (T) = DatumGetChar(newdatum); \
				break; \
			case sizeof(int16): \
				*(int16 *) (T) = DatumGetInt16(newdatum); \
				break; \
			case sizeof(int32): \
				*(int32 *) (T) = DatumGetInt32(newdatum); \
				break; \
			default: \
				elog(ERROR, "unsupported byval length: %d", \
					 (int) (attlen)); \
				break; \
		} \
	} while (0)
#endif   /* SIZEOF_DATUM == 8 */

#endif

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Editing: tupmacs.h

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