From f368c94fd6c170dbcfb348a99aeacae8ef20b6f9 Mon Sep 17 00:00:00 2001
From: Bruce Momjian <bruce@momjian.us>
Date: Sat, 4 Aug 2001 19:35:32 +0000
Subject: [PATCH] 1. Fixed error with empty array ( '{}' ),    test data
 changed to include such data 2. Test a dimension of an array ( we support
 only one-dimension)

Oleg Bartunov
---
 contrib/intarray/_int.c              | 39 +++++++++++++++++++---------
 contrib/intarray/data/test__int.data | 18 ++++++-------
 2 files changed, 36 insertions(+), 21 deletions(-)

diff --git a/contrib/intarray/_int.c b/contrib/intarray/_int.c
index 56d15dac01..8a90a77641 100644
--- a/contrib/intarray/_int.c
+++ b/contrib/intarray/_int.c
@@ -36,7 +36,8 @@
 #define ARRPTR(x)  ( (int4 *) ARR_DATA_PTR(x) )
 #define ARRNELEMS(x)  ArrayGetNItems( ARR_NDIM(x), ARR_DIMS(x))
 
-#define ARRISNULL(x) ( (x) ? ( ( ARR_NDIM(x) == NDIM ) ? ( ( ARRNELEMS( x ) ) ? 0 : 1 ) : 1  ) : 1 )
+#define ARRISNULL(x) ( (x) ? ( ( ARR_NDIM(x) == NDIM ) ? ( ( ARRNELEMS( x ) ) ? 0 : 1 ) : ( ( ARR_NDIM(x) ) ? (elog(ERROR,"Array is not one-dimentional: %d dimentions", ARR_NDIM(x)),1) : 1 ) ) : 1 )
+#define ARRISVOID(x) ( (x) ? ( ( ARR_NDIM(x) == NDIM ) ? ( ( ARRNELEMS( x ) ) ? 0 : 1 ) : 1  ) : 0 )
 
 #define SORT(x) \
 	do { \
@@ -300,15 +301,16 @@ g_int_compress(PG_FUNCTION_ARGS)
 
 	if (ARRISNULL(r))
 	{
-#ifdef GIST_DEBUG
-		elog(NOTICE, "COMP IN: NULL");
-#endif
-		if (r)
-			if (r != (ArrayType *) DatumGetPointer(entry->key))
-				pfree(r);
-
-		gistentryinit(*retval, (Datum) 0, entry->rel, entry->page, entry->offset,
+		if ( ARRISVOID(r) ) {
+			ArrayType *out = new_intArrayType( 0 );
+			gistentryinit(*retval, PointerGetDatum(out),
+				  entry->rel, entry->page, entry->offset, VARSIZE(out), FALSE);
+		} else {
+			gistentryinit(*retval, (Datum) 0, entry->rel, entry->page, entry->offset,
 					  0, FALSE);
+		}
+		if (r) pfree(r);
+
 		PG_RETURN_POINTER(retval);
 	}
 
@@ -371,14 +373,20 @@ g_int_decompress(PG_FUNCTION_ARGS)
 	else
 		in = NULL;
 
-	if (entry->bytes < ARR_OVERHEAD(NDIM) || ARRISNULL(in))
+	if (ARRISNULL(in))
 	{
 		retval = palloc(sizeof(GISTENTRY));
 
+		if ( ARRISVOID(in) ) {
+			r = new_intArrayType( 0 );
+			gistentryinit(*retval, PointerGetDatum(r),
+				  entry->rel, entry->page, entry->offset, VARSIZE(r), FALSE);
+		} else {
+			gistentryinit(*retval, (Datum) 0, entry->rel, entry->page, entry->offset, 0, FALSE);
+		}  
 		if (in)
 			if (in != (ArrayType *) DatumGetPointer(entry->key))
 				pfree(in);
-		gistentryinit(*retval, (Datum) 0, entry->rel, entry->page, entry->offset, 0, FALSE);
 #ifdef GIST_DEBUG
 		elog(NOTICE, "DECOMP IN: NULL");
 #endif
@@ -1137,10 +1145,17 @@ g_intbig_compress(PG_FUNCTION_ARGS)
 
 	if (ARRISNULL(in))
 	{
+		if ( ARRISVOID(in) ) {
+			r = new_intArrayType( SIGLENINT );
+			gistentryinit(*retval, PointerGetDatum(r),
+				  entry->rel, entry->page, entry->offset, VARSIZE(r), FALSE);
+		} else {
+			gistentryinit(*retval, (Datum) 0, entry->rel, entry->page, entry->offset,
+					  0, FALSE);
+		}
 		if (in)
 			if (in != (ArrayType *) DatumGetPointer(entry->key))
 				pfree(in);
-		gistentryinit(*retval, (Datum) 0, entry->rel, entry->page, entry->offset, 0, FALSE);
 		PG_RETURN_POINTER (retval);
 	}
 
diff --git a/contrib/intarray/data/test__int.data b/contrib/intarray/data/test__int.data
index 9750bf0363..b3903d0f33 100644
--- a/contrib/intarray/data/test__int.data
+++ b/contrib/intarray/data/test__int.data
@@ -4,7 +4,7 @@
 {79,83,16,63,32}
 {52,41,61,79,94,87}
 {76,59,39,36,21}
-\N
+{}
 {41,79,76,96,3}
 {25,59,5,96,32}
 {92,58,12,57}
@@ -57,7 +57,7 @@
 {58,1,39,48}
 {78,36,70,92}
 {43,3,22,95,51}
-\N
+{}
 {88,64,25,64,86}
 {34,6,49,90,25}
 {86,35,13,22}
@@ -76,12 +76,12 @@
 {89,11,67,55,73}
 {78,39,84,63,62,45}
 {50,63,8}
-\N
+{}
 {96,36,58,65,96}
 {59,86,41,30}
 {90,60,39,47,19}
 {70,100,73,99}
-\N
+{}
 {85,14,39}
 {76,53}
 {96,38,52,13,87,85}
@@ -95,7 +95,7 @@
 {84,93,36,95,34,69}
 {66,25,5,40}
 {77,6,57,42}
-\N
+{}
 {88,81,85,37,12}
 {56,73,38}
 {70,70,6,19}
@@ -176,7 +176,7 @@
 {31,48}
 {28,35,18}
 {77,55,100,73,57,62}
-\N
+{}
 {14,59,53}
 {98,3}
 {13,56}
@@ -188,7 +188,7 @@
 {41,76,39,84,32}
 {94,66,47}
 {55,28}
-\N
+{}
 {94,65,59,20}
 {55,50,56,14,58}
 {14,94,52,25,69,95}
@@ -203,7 +203,7 @@
 {46,69}
 {35,54}
 {36,79,54}
-\N
+{}
 {63,78}
 {12,86,52,29,60,30}
 {29,27,58,86,42,62}
@@ -215,7 +215,7 @@
 {14,85,14,26,3}
 {46,71,10,16}
 {30,63}
-\N
+{}
 {91,30,56}
 {46,36,68,91,36,88}
 {24,61}