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📄 acl.h(13.83 KB)
📄 aclchk_internal.h(1.42 KB)
📄 array.h(18.84 KB)
📄 arrayaccess.h(2.97 KB)
📄 ascii.h(579 B)
📄 attoptcache.h(725 B)
📄 builtins.h(56.08 KB)
📄 bytea.h(1.63 KB)
📄 cash.h(2.07 KB)
📄 catcache.h(7.4 KB)
📄 combocid.h(870 B)
📄 date.h(7.77 KB)
📄 datetime.h(10.59 KB)
📄 datum.h(1.88 KB)
📄 dynahash.h(498 B)
📄 dynamic_loader.h(648 B)
📄 elog.h(14.74 KB)
📄 errcodes.h(20.1 KB)
📄 evtcache.h(934 B)
📄 expandeddatum.h(6.89 KB)
📄 fmgroids.h(72.24 KB)
📄 fmgrtab.h(1.15 KB)
📄 formatting.h(1.41 KB)
📄 geo_decls.h(16.22 KB)
📄 guc.h(15.6 KB)
📄 guc_tables.h(7.22 KB)
📄 help_config.h(457 B)
📄 hsearch.h(5.97 KB)
📄 index_selfuncs.h(2.16 KB)
📄 inet.h(4.6 KB)
📄 int8.h(4.12 KB)
📄 inval.h(1.71 KB)
📄 json.h(3.26 KB)
📄 jsonapi.h(4.19 KB)
📄 jsonb.h(16.13 KB)
📄 logtape.h(1.5 KB)
📄 lsyscache.h(6.91 KB)
📄 memdebug.h(1.25 KB)
📄 memutils.h(6.16 KB)
📄 nabstime.h(5.79 KB)
📄 numeric.h(1.92 KB)
📄 palloc.h(5.04 KB)
📄 pg_crc.h(3.42 KB)
📄 pg_locale.h(2.63 KB)
📄 pg_lsn.h(1.29 KB)
📄 pg_rusage.h(847 B)
📄 plancache.h(8.36 KB)
📄 portal.h(9.64 KB)
📄 probes.h(6.54 KB)
📄 ps_status.h(668 B)
📄 rangetypes.h(8.31 KB)
📄 rel.h(18.18 KB)
📄 relcache.h(3.79 KB)
📄 relfilenodemap.h(561 B)
📄 relmapper.h(1.8 KB)
📄 reltrigger.h(1.95 KB)
📄 resowner.h(2.52 KB)
📄 resowner_private.h(3.42 KB)
📄 rls.h(1.73 KB)
📄 ruleutils.h(1.2 KB)
📄 sampling.h(1.96 KB)
📄 selfuncs.h(9.39 KB)
📄 snapmgr.h(4.13 KB)
📄 snapshot.h(4.2 KB)
📄 sortsupport.h(10.81 KB)
📄 spccache.h(604 B)
📄 syscache.h(5.91 KB)
📄 timeout.h(2.48 KB)
📄 timestamp.h(10.34 KB)
📄 tqual.h(4.11 KB)
📄 tuplesort.h(4.86 KB)
📄 tuplestore.h(3.23 KB)
📄 typcache.h(5.71 KB)
📄 tzparser.h(1.13 KB)
📄 uuid.h(861 B)
📄 varbit.h(4.31 KB)
📄 xml.h(3.89 KB)

Editing: arrayaccess.h

/*-------------------------------------------------------------------------
 *
 * arrayaccess.h
 *	  Declarations for element-by-element access to Postgres arrays.
 *
 *
 * Portions Copyright (c) 1996-2016, PostgreSQL Global Development Group
 * Portions Copyright (c) 1994, Regents of the University of California
 *
 * src/include/utils/arrayaccess.h
 *
 *-------------------------------------------------------------------------
 */
#ifndef ARRAYACCESS_H
#define ARRAYACCESS_H

#include "access/tupmacs.h"
#include "utils/array.h"

/*
 * Functions for iterating through elements of a flat or expanded array.
 * These require a state struct "array_iter iter".
 *
 * Use "array_iter_setup(&iter, arrayptr);" to prepare to iterate, and
 * "datumvar = array_iter_next(&iter, &isnullvar, index, ...);" to fetch
 * the next element into datumvar/isnullvar.
 * "index" must be the zero-origin element number; we make caller provide
 * this since caller is generally counting the elements anyway.  Despite
 * that, these functions can only fetch elements sequentially.
 */

typedef struct array_iter
{
	/* datumptr being NULL or not tells if we have flat or expanded array */

/* Fields used when we have an expanded array */
	Datum	   *datumptr;		/* Pointer to Datum array */
	bool	   *isnullptr;		/* Pointer to isnull array */

/* Fields used when we have a flat array */
	char	   *dataptr;		/* Current spot in the data area */
	bits8	   *bitmapptr;		/* Current byte of the nulls bitmap, or NULL */
	int			bitmask;		/* mask for current bit in nulls bitmap */
} array_iter;

static inline void
array_iter_setup(array_iter *it, AnyArrayType *a)
{
	if (VARATT_IS_EXPANDED_HEADER(a))
	{
		if (a->xpn.dvalues)
		{
			it->datumptr = a->xpn.dvalues;
			it->isnullptr = a->xpn.dnulls;
			/* we must fill all fields to prevent compiler warnings */
			it->dataptr = NULL;
			it->bitmapptr = NULL;
		}
		else
		{
			/* Work with flat array embedded in the expanded datum */
			it->datumptr = NULL;
			it->isnullptr = NULL;
			it->dataptr = ARR_DATA_PTR(a->xpn.fvalue);
			it->bitmapptr = ARR_NULLBITMAP(a->xpn.fvalue);
		}
	}
	else
	{
		it->datumptr = NULL;
		it->isnullptr = NULL;
		it->dataptr = ARR_DATA_PTR(&a->flt);
		it->bitmapptr = ARR_NULLBITMAP(&a->flt);
	}
	it->bitmask = 1;
}

static inline Datum
array_iter_next(array_iter *it, bool *isnull, int i,
				int elmlen, bool elmbyval, char elmalign)
{
	Datum		ret;

if (it->datumptr)
	{
		ret = it->datumptr[i];
		*isnull = it->isnullptr ? it->isnullptr[i] : false;
	}
	else
	{
		if (it->bitmapptr && (*(it->bitmapptr) & it->bitmask) == 0)
		{
			*isnull = true;
			ret = (Datum) 0;
		}
		else
		{
			*isnull = false;
			ret = fetch_att(it->dataptr, elmbyval, elmlen);
			it->dataptr = att_addlength_pointer(it->dataptr, elmlen,
												it->dataptr);
			it->dataptr = (char *) att_align_nominal(it->dataptr, elmalign);
		}
		it->bitmask <<= 1;
		if (it->bitmask == 0x100)
		{
			if (it->bitmapptr)
				it->bitmapptr++;
			it->bitmask = 1;
		}
	}

return ret;
}

#endif   /* ARRAYACCESS_H */

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Editing: arrayaccess.h

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