Change Assert(len > 0) to Assert(len >= 0)

Change PG_RETURN_INT32(0) to PG_RETURN_VOID()

src/backend/utils/mb/conversion_procs/ascii_and_mic/ascii_and_mic.c

@@ -6,7 +6,7 @@
  * Portions Copyright (c) 1994, Regents of the University of California
  *
  * IDENTIFICATION
- *	  $Header: /cvsroot/pgsql/src/backend/utils/mb/conversion_procs/ascii_and_mic/ascii_and_mic.c,v 1.3 2002/09/04 20:31:31 momjian Exp $
+ *	  $Header: /cvsroot/pgsql/src/backend/utils/mb/conversion_procs/ascii_and_mic/ascii_and_mic.c,v 1.4 2002/09/13 06:41:17 ishii Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -41,11 +41,11 @@ ascii_to_mic(PG_FUNCTION_ARGS)
 
 	Assert(PG_GETARG_INT32(0) == PG_SQL_ASCII);
 	Assert(PG_GETARG_INT32(1) == PG_MULE_INTERNAL);
-	Assert(len > 0);
+	Assert(len >= 0);
 
 	pg_ascii2mic(src, dest, len);
 
-	PG_RETURN_INT32(0);
+	PG_RETURN_VOID();
 }
 
 Datum
@@ -57,9 +57,9 @@ mic_to_ascii(PG_FUNCTION_ARGS)
 
 	Assert(PG_GETARG_INT32(0) == PG_MULE_INTERNAL);
 	Assert(PG_GETARG_INT32(1) == PG_SQL_ASCII);
-	Assert(len > 0);
+	Assert(len >= 0);
 
 	pg_mic2ascii(src, dest, len);
 
-	PG_RETURN_INT32(0);
+	PG_RETURN_VOID();
 }

src/backend/utils/mb/conversion_procs/cyrillic_and_mic/cyrillic_and_mic.c

@@ -6,7 +6,7 @@
  * Portions Copyright (c) 1994, Regents of the University of California
  *
  * IDENTIFICATION
- *	  $Header: /cvsroot/pgsql/src/backend/utils/mb/conversion_procs/cyrillic_and_mic/cyrillic_and_mic.c,v 1.3 2002/09/04 20:31:31 momjian Exp $
+ *	  $Header: /cvsroot/pgsql/src/backend/utils/mb/conversion_procs/cyrillic_and_mic/cyrillic_and_mic.c,v 1.4 2002/09/13 06:41:17 ishii Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -88,11 +88,11 @@ koi8r_to_mic(PG_FUNCTION_ARGS)
 
 	Assert(PG_GETARG_INT32(0) == PG_KOI8R);
 	Assert(PG_GETARG_INT32(1) == PG_MULE_INTERNAL);
-	Assert(len > 0);
+	Assert(len >= 0);
 
 	koi8r2mic(src, dest, len);
 
-	PG_RETURN_INT32(0);
+	PG_RETURN_VOID();
 }
 
 Datum
@@ -104,11 +104,11 @@ mic_to_koi8r(PG_FUNCTION_ARGS)
 
 	Assert(PG_GETARG_INT32(0) == PG_MULE_INTERNAL);
 	Assert(PG_GETARG_INT32(1) == PG_KOI8R);
-	Assert(len > 0);
+	Assert(len >= 0);
 
 	mic2koi8r(src, dest, len);
 
-	PG_RETURN_INT32(0);
+	PG_RETURN_VOID();
 }
 
 Datum
@@ -120,11 +120,11 @@ iso_to_mic(PG_FUNCTION_ARGS)
 
 	Assert(PG_GETARG_INT32(0) == PG_ISO_8859_5);
 	Assert(PG_GETARG_INT32(1) == PG_MULE_INTERNAL);
-	Assert(len > 0);
+	Assert(len >= 0);
 
 	iso2mic(src, dest, len);
 
-	PG_RETURN_INT32(0);
+	PG_RETURN_VOID();
 }
 
 Datum
@@ -136,11 +136,11 @@ mic_to_iso(PG_FUNCTION_ARGS)
 
 	Assert(PG_GETARG_INT32(0) == PG_MULE_INTERNAL);
 	Assert(PG_GETARG_INT32(1) == PG_ISO_8859_5);
-	Assert(len > 0);
+	Assert(len >= 0);
 
 	mic2iso(src, dest, len);
 
-	PG_RETURN_INT32(0);
+	PG_RETURN_VOID();
 }
 
 Datum
@@ -152,11 +152,11 @@ win1251_to_mic(PG_FUNCTION_ARGS)
 
 	Assert(PG_GETARG_INT32(0) == PG_WIN1251);
 	Assert(PG_GETARG_INT32(1) == PG_MULE_INTERNAL);
-	Assert(len > 0);
+	Assert(len >= 0);
 
 	win12512mic(src, dest, len);
 
-	PG_RETURN_INT32(0);
+	PG_RETURN_VOID();
 }
 
 Datum
@@ -168,11 +168,11 @@ mic_to_win1251(PG_FUNCTION_ARGS)
 
 	Assert(PG_GETARG_INT32(0) == PG_MULE_INTERNAL);
 	Assert(PG_GETARG_INT32(1) == PG_WIN1251);
-	Assert(len > 0);
+	Assert(len >= 0);
 
 	mic2win1251(src, dest, len);
 
-	PG_RETURN_INT32(0);
+	PG_RETURN_VOID();
 }
 
 Datum
@@ -184,11 +184,11 @@ alt_to_mic(PG_FUNCTION_ARGS)
 
 	Assert(PG_GETARG_INT32(0) == PG_ALT);
 	Assert(PG_GETARG_INT32(1) == PG_MULE_INTERNAL);
-	Assert(len > 0);
+	Assert(len >= 0);
 
 	alt2mic(src, dest, len);
 
-	PG_RETURN_INT32(0);
+	PG_RETURN_VOID();
 }
 
 Datum
@@ -200,11 +200,11 @@ mic_to_alt(PG_FUNCTION_ARGS)
 
 	Assert(PG_GETARG_INT32(0) == PG_MULE_INTERNAL);
 	Assert(PG_GETARG_INT32(1) == PG_ALT);
-	Assert(len > 0);
+	Assert(len >= 0);
 
 	mic2alt(src, dest, len);
 
-	PG_RETURN_INT32(0);
+	PG_RETURN_VOID();
 }
 
 Datum
@@ -217,14 +217,14 @@ koi8r_to_win1251(PG_FUNCTION_ARGS)
 
 	Assert(PG_GETARG_INT32(0) == PG_KOI8R);
 	Assert(PG_GETARG_INT32(1) == PG_WIN1251);
-	Assert(len > 0);
+	Assert(len >= 0);
 
 	buf = palloc(len * ENCODING_GROWTH_RATE);
 	koi8r2mic(src, buf, len);
 	mic2win1251(buf, dest, strlen(buf));
 	pfree(buf);
 
-	PG_RETURN_INT32(0);
+	PG_RETURN_VOID();
 }
 
 Datum
@@ -237,14 +237,14 @@ win1251_to_koi8r(PG_FUNCTION_ARGS)
 
 	Assert(PG_GETARG_INT32(0) == PG_WIN1251);
 	Assert(PG_GETARG_INT32(1) == PG_KOI8R);
-	Assert(len > 0);
+	Assert(len >= 0);
 
 	buf = palloc(len * ENCODING_GROWTH_RATE);
 	win12512mic(src, buf, len);
 	mic2koi8r(buf, dest, strlen(buf));
 	pfree(buf);
 
-	PG_RETURN_INT32(0);
+	PG_RETURN_VOID();
 }
 
 Datum
@@ -257,14 +257,14 @@ koi8r_to_alt(PG_FUNCTION_ARGS)
 
 	Assert(PG_GETARG_INT32(0) == PG_KOI8R);
 	Assert(PG_GETARG_INT32(1) == PG_ALT);
-	Assert(len > 0);
+	Assert(len >= 0);
 
 	buf = palloc(len * ENCODING_GROWTH_RATE);
 	koi8r2mic(src, buf, len);
 	mic2alt(buf, dest, strlen(buf));
 	pfree(buf);
 
-	PG_RETURN_INT32(0);
+	PG_RETURN_VOID();
 }
 
 Datum
@@ -277,14 +277,14 @@ alt_to_koi8r(PG_FUNCTION_ARGS)
 
 	Assert(PG_GETARG_INT32(0) == PG_ALT);
 	Assert(PG_GETARG_INT32(1) == PG_KOI8R);
-	Assert(len > 0);
+	Assert(len >= 0);
 
 	buf = palloc(len * ENCODING_GROWTH_RATE);
 	alt2mic(src, buf, len);
 	mic2koi8r(buf, dest, strlen(buf));
 	pfree(buf);
 
-	PG_RETURN_INT32(0);
+	PG_RETURN_VOID();
 }
 
 Datum
@@ -297,14 +297,14 @@ alt_to_win1251(PG_FUNCTION_ARGS)
 
 	Assert(PG_GETARG_INT32(0) == PG_ALT);
 	Assert(PG_GETARG_INT32(1) == PG_WIN1251);
-	Assert(len > 0);
+	Assert(len >= 0);
 
 	buf = palloc(len * ENCODING_GROWTH_RATE);
 	alt2mic(src, buf, len);
 	mic2win1251(buf, dest, strlen(buf));
 	pfree(buf);
 
-	PG_RETURN_INT32(0);
+	PG_RETURN_VOID();
 }
 
 Datum
@@ -317,14 +317,14 @@ win1251_to_alt(PG_FUNCTION_ARGS)
 
 	Assert(PG_GETARG_INT32(0) == PG_WIN1251);
 	Assert(PG_GETARG_INT32(1) == PG_ALT);
-	Assert(len > 0);
+	Assert(len >= 0);
 
 	buf = palloc(len * ENCODING_GROWTH_RATE);
 	win12512mic(src, buf, len);
 	mic2alt(buf, dest, strlen(buf));
 	pfree(buf);
 
-	PG_RETURN_INT32(0);
+	PG_RETURN_VOID();
 }
 
 Datum
@@ -337,14 +337,14 @@ iso_to_koi8r(PG_FUNCTION_ARGS)
 
 	Assert(PG_GETARG_INT32(0) == PG_ISO_8859_5);
 	Assert(PG_GETARG_INT32(1) == PG_KOI8R);
-	Assert(len > 0);
+	Assert(len >= 0);
 
 	buf = palloc(len * ENCODING_GROWTH_RATE);
 	iso2mic(src, buf, len);
 	mic2koi8r(buf, dest, strlen(buf));
 	pfree(buf);
 
-	PG_RETURN_INT32(0);
+	PG_RETURN_VOID();
 }
 
 Datum
@@ -357,14 +357,14 @@ koi8r_to_iso(PG_FUNCTION_ARGS)
 
 	Assert(PG_GETARG_INT32(0) == PG_KOI8R);
 	Assert(PG_GETARG_INT32(1) == PG_ISO_8859_5);
-	Assert(len > 0);
+	Assert(len >= 0);
 
 	buf = palloc(len * ENCODING_GROWTH_RATE);
 	koi8r2mic(src, buf, len);
 	mic2iso(buf, dest, strlen(buf));
 	pfree(buf);
 
-	PG_RETURN_INT32(0);
+	PG_RETURN_VOID();
 }
 
 Datum
@@ -377,14 +377,14 @@ iso_to_win1251(PG_FUNCTION_ARGS)
 
 	Assert(PG_GETARG_INT32(0) == PG_ISO_8859_5);
 	Assert(PG_GETARG_INT32(1) == PG_WIN1251);
-	Assert(len > 0);
+	Assert(len >= 0);
 
 	buf = palloc(len * ENCODING_GROWTH_RATE);
 	iso2mic(src, buf, len);
 	mic2win1251(buf, dest, strlen(buf));
 	pfree(buf);
 
-	PG_RETURN_INT32(0);
+	PG_RETURN_VOID();
 }
 
 Datum
@@ -397,14 +397,14 @@ win1251_to_iso(PG_FUNCTION_ARGS)
 
 	Assert(PG_GETARG_INT32(0) == PG_WIN1251);
 	Assert(PG_GETARG_INT32(1) == PG_ISO_8859_5);
-	Assert(len > 0);
+	Assert(len >= 0);
 
 	buf = palloc(len * ENCODING_GROWTH_RATE);
 	win12512mic(src, buf, len);
 	mic2win1251(buf, dest, strlen(buf));
 	pfree(buf);
 
-	PG_RETURN_INT32(0);
+	PG_RETURN_VOID();
 }
 
 Datum
@@ -417,14 +417,14 @@ iso_to_alt(PG_FUNCTION_ARGS)
 
 	Assert(PG_GETARG_INT32(0) == PG_ISO_8859_5);
 	Assert(PG_GETARG_INT32(1) == PG_ALT);
-	Assert(len > 0);
+	Assert(len >= 0);
 
 	buf = palloc(len * ENCODING_GROWTH_RATE);
 	iso2mic(src, buf, len);
 	mic2alt(buf, dest, strlen(buf));
 	pfree(buf);
 
-	PG_RETURN_INT32(0);
+	PG_RETURN_VOID();
 }
 
 Datum
@@ -437,14 +437,14 @@ alt_to_iso(PG_FUNCTION_ARGS)
 
 	Assert(PG_GETARG_INT32(0) == PG_ALT);
 	Assert(PG_GETARG_INT32(1) == PG_ISO_8859_5);
-	Assert(len > 0);
+	Assert(len >= 0);
 
 	buf = palloc(len * ENCODING_GROWTH_RATE);
 	alt2mic(src, buf, len);
 	mic2alt(buf, dest, strlen(buf));
 	pfree(buf);
 
-	PG_RETURN_INT32(0);
+	PG_RETURN_VOID();
 }
 
 /*

src/backend/utils/mb/conversion_procs/euc_cn_and_mic/euc_cn_and_mic.c

@@ -6,7 +6,7 @@
  * Portions Copyright (c) 1994, Regents of the University of California
  *
  * IDENTIFICATION
- *	  $Header: /cvsroot/pgsql/src/backend/utils/mb/conversion_procs/euc_cn_and_mic/euc_cn_and_mic.c,v 1.3 2002/09/04 20:31:31 momjian Exp $
+ *	  $Header: /cvsroot/pgsql/src/backend/utils/mb/conversion_procs/euc_cn_and_mic/euc_cn_and_mic.c,v 1.4 2002/09/13 06:41:17 ishii Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -44,11 +44,11 @@ euc_cn_to_mic(PG_FUNCTION_ARGS)
 
 	Assert(PG_GETARG_INT32(0) == PG_EUC_CN);
 	Assert(PG_GETARG_INT32(1) == PG_MULE_INTERNAL);
-	Assert(len > 0);
+	Assert(len >= 0);
 
 	euc_cn2mic(src, dest, len);
 
-	PG_RETURN_INT32(0);
+	PG_RETURN_VOID();
 }
 
 Datum
@@ -60,11 +60,11 @@ mic_to_euc_cn(PG_FUNCTION_ARGS)
 
 	Assert(PG_GETARG_INT32(0) == PG_MULE_INTERNAL);
 	Assert(PG_GETARG_INT32(1) == PG_EUC_CN);
-	Assert(len > 0);
+	Assert(len >= 0);
 
 	mic2euc_cn(src, dest, len);
 
-	PG_RETURN_INT32(0);
+	PG_RETURN_VOID();
 }
 
 /*
@@ -75,7 +75,7 @@ euc_cn2mic(unsigned char *euc, unsigned char *p, int len)
 {
 	int			c1;
 
-	while (len > 0 && (c1 = *euc++))
+	while (len >= 0 && (c1 = *euc++))
 	{
 		if (c1 & 0x80)
 		{
@@ -101,7 +101,7 @@ mic2euc_cn(unsigned char *mic, unsigned char *p, int len)
 {
 	int			c1;
 
-	while (len > 0 && (c1 = *mic))
+	while (len >= 0 && (c1 = *mic))
 	{
 		len -= pg_mic_mblen(mic++);
 

src/backend/utils/mb/conversion_procs/euc_jp_and_sjis/euc_jp_and_sjis.c

@@ -6,7 +6,7 @@
  * Portions Copyright (c) 1994, Regents of the University of California
  *
  * IDENTIFICATION
- *	  $Header: /cvsroot/pgsql/src/backend/utils/mb/conversion_procs/euc_jp_and_sjis/euc_jp_and_sjis.c,v 1.3 2002/09/04 20:31:31 momjian Exp $
+ *	  $Header: /cvsroot/pgsql/src/backend/utils/mb/conversion_procs/euc_jp_and_sjis/euc_jp_and_sjis.c,v 1.4 2002/09/13 06:41:17 ishii Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -69,14 +69,14 @@ euc_jp_to_sjis(PG_FUNCTION_ARGS)
 
 	Assert(PG_GETARG_INT32(0) == PG_EUC_JP);
 	Assert(PG_GETARG_INT32(1) == PG_SJIS);
-	Assert(len > 0);
+	Assert(len >= 0);
 
 	buf = palloc(len * ENCODING_GROWTH_RATE);
 	euc_jp2mic(src, buf, len);
 	mic2sjis(buf, dest, strlen(buf));
 	pfree(buf);
 
-	PG_RETURN_INT32(0);
+	PG_RETURN_VOID();
 }
 
 Datum
@@ -89,14 +89,14 @@ sjis_to_euc_jp(PG_FUNCTION_ARGS)
 
 	Assert(PG_GETARG_INT32(0) == PG_SJIS);
 	Assert(PG_GETARG_INT32(1) == PG_EUC_JP);
-	Assert(len > 0);
+	Assert(len >= 0);
 
 	buf = palloc(len * ENCODING_GROWTH_RATE);
 	sjis2mic(src, buf, len);
 	mic2euc_jp(buf, dest, strlen(buf));
 	pfree(buf);
 
-	PG_RETURN_INT32(0);
+	PG_RETURN_VOID();
 }
 
 Datum
@@ -108,11 +108,11 @@ euc_jp_to_mic(PG_FUNCTION_ARGS)
 
 	Assert(PG_GETARG_INT32(0) == PG_EUC_JP);
 	Assert(PG_GETARG_INT32(1) == PG_MULE_INTERNAL);
-	Assert(len > 0);
+	Assert(len >= 0);
 
 	euc_jp2mic(src, dest, len);
 
-	PG_RETURN_INT32(0);
+	PG_RETURN_VOID();
 }
 
 Datum
@@ -124,11 +124,11 @@ mic_to_euc_jp(PG_FUNCTION_ARGS)
 
 	Assert(PG_GETARG_INT32(0) == PG_MULE_INTERNAL);
 	Assert(PG_GETARG_INT32(1) == PG_EUC_JP);
-	Assert(len > 0);
+	Assert(len >= 0);
 
 	mic2sjis(src, dest, len);
 
-	PG_RETURN_INT32(0);
+	PG_RETURN_VOID();
 }
 
 Datum
@@ -140,11 +140,11 @@ sjis_to_mic(PG_FUNCTION_ARGS)
 
 	Assert(PG_GETARG_INT32(0) == PG_SJIS);
 	Assert(PG_GETARG_INT32(1) == PG_MULE_INTERNAL);
-	Assert(len > 0);
+	Assert(len >= 0);
 
 	sjis2mic(src, dest, len);
 
-	PG_RETURN_INT32(0);
+	PG_RETURN_VOID();
 }
 
 Datum
@@ -156,11 +156,11 @@ mic_to_sjis(PG_FUNCTION_ARGS)
 
 	Assert(PG_GETARG_INT32(0) == PG_MULE_INTERNAL);
 	Assert(PG_GETARG_INT32(1) == PG_SJIS);
-	Assert(len > 0);
+	Assert(len >= 0);
 
 	mic2sjis(src, dest, len);
 
-	PG_RETURN_INT32(0);
+	PG_RETURN_VOID();
 }
 
 /*
@@ -177,7 +177,7 @@ sjis2mic(unsigned char *sjis, unsigned char *p, int len)
 				k2;
 
 /* Eiji Tokuya patched end */
-	while (len > 0 && (c1 = *sjis++))
+	while (len >= 0 && (c1 = *sjis++))
 	{
 		if (c1 >= 0xa1 && c1 <= 0xdf)
 		{
@@ -303,7 +303,7 @@ mic2sjis(unsigned char *mic, unsigned char *p, int len)
 				c2,
 				k;
 
-	while (len > 0 && (c1 = *mic))
+	while (len >= 0 && (c1 = *mic))
 	{
 		len -= pg_mic_mblen(mic++);
 
@@ -383,7 +383,7 @@ euc_jp2mic(unsigned char *euc, unsigned char *p, int len)
 {
 	int			c1;
 
-	while (len > 0 && (c1 = *euc++))
+	while (len >= 0 && (c1 = *euc++))
 	{
 		if (c1 == SS2)
 		{						/* 1 byte kana? */
@@ -422,7 +422,7 @@ mic2euc_jp(unsigned char *mic, unsigned char *p, int len)
 {
 	int			c1;
 
-	while (len > 0 && (c1 = *mic))
+	while (len >= 0 && (c1 = *mic))
 	{
 		len -= pg_mic_mblen(mic++);
 

src/backend/utils/mb/conversion_procs/euc_kr_and_mic/euc_kr_and_mic.c

@@ -6,7 +6,7 @@
  * Portions Copyright (c) 1994, Regents of the University of California
  *
  * IDENTIFICATION
- *	  $Header: /cvsroot/pgsql/src/backend/utils/mb/conversion_procs/euc_kr_and_mic/euc_kr_and_mic.c,v 1.3 2002/09/04 20:31:31 momjian Exp $
+ *	  $Header: /cvsroot/pgsql/src/backend/utils/mb/conversion_procs/euc_kr_and_mic/euc_kr_and_mic.c,v 1.4 2002/09/13 06:41:17 ishii Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -44,11 +44,11 @@ euc_kr_to_mic(PG_FUNCTION_ARGS)
 
 	Assert(PG_GETARG_INT32(0) == PG_EUC_KR);
 	Assert(PG_GETARG_INT32(1) == PG_MULE_INTERNAL);
-	Assert(len > 0);
+	Assert(len >= 0);
 
 	euc_kr2mic(src, dest, len);
 
-	PG_RETURN_INT32(0);
+	PG_RETURN_VOID();
 }
 
 Datum
@@ -60,11 +60,11 @@ mic_to_euc_kr(PG_FUNCTION_ARGS)
 
 	Assert(PG_GETARG_INT32(0) == PG_MULE_INTERNAL);
 	Assert(PG_GETARG_INT32(1) == PG_EUC_KR);
-	Assert(len > 0);
+	Assert(len >= 0);
 
 	mic2euc_kr(src, dest, len);
 
-	PG_RETURN_INT32(0);
+	PG_RETURN_VOID();
 }
 
 /*
@@ -75,7 +75,7 @@ euc_kr2mic(unsigned char *euc, unsigned char *p, int len)
 {
 	int			c1;
 
-	while (len > 0 && (c1 = *euc++))
+	while (len >= 0 && (c1 = *euc++))
 	{
 		if (c1 & 0x80)
 		{
@@ -101,7 +101,7 @@ mic2euc_kr(unsigned char *mic, unsigned char *p, int len)
 {
 	int			c1;
 
-	while (len > 0 && (c1 = *mic))
+	while (len >= 0 && (c1 = *mic))
 	{
 		len -= pg_mic_mblen(mic++);
 

src/backend/utils/mb/conversion_procs/euc_tw_and_big5/euc_tw_and_big5.c

@@ -6,7 +6,7 @@
  * Portions Copyright (c) 1994, Regents of the University of California
  *
  * IDENTIFICATION
- *	  $Header: /cvsroot/pgsql/src/backend/utils/mb/conversion_procs/euc_tw_and_big5/euc_tw_and_big5.c,v 1.3 2002/09/04 20:31:31 momjian Exp $
+ *	  $Header: /cvsroot/pgsql/src/backend/utils/mb/conversion_procs/euc_tw_and_big5/euc_tw_and_big5.c,v 1.4 2002/09/13 06:41:17 ishii Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -57,14 +57,14 @@ euc_tw_to_big5(PG_FUNCTION_ARGS)
 
 	Assert(PG_GETARG_INT32(0) == PG_EUC_TW);
 	Assert(PG_GETARG_INT32(1) == PG_BIG5);
-	Assert(len > 0);
+	Assert(len >= 0);
 
 	buf = palloc(len * ENCODING_GROWTH_RATE);
 	euc_tw2mic(src, buf, len);
 	mic2big5(buf, dest, strlen(buf));
 	pfree(buf);
 
-	PG_RETURN_INT32(0);
+	PG_RETURN_VOID();
 }
 
 Datum
@@ -77,14 +77,14 @@ big5_to_euc_tw(PG_FUNCTION_ARGS)
 
 	Assert(PG_GETARG_INT32(0) == PG_BIG5);
 	Assert(PG_GETARG_INT32(1) == PG_EUC_TW);
-	Assert(len > 0);
+	Assert(len >= 0);
 
 	buf = palloc(len * ENCODING_GROWTH_RATE);
 	big52mic(src, buf, len);
 	mic2euc_tw(buf, dest, strlen(buf));
 	pfree(buf);
 
-	PG_RETURN_INT32(0);
+	PG_RETURN_VOID();
 }
 
 Datum
@@ -96,11 +96,11 @@ euc_tw_to_mic(PG_FUNCTION_ARGS)
 
 	Assert(PG_GETARG_INT32(0) == PG_EUC_TW);
 	Assert(PG_GETARG_INT32(1) == PG_MULE_INTERNAL);
-	Assert(len > 0);
+	Assert(len >= 0);
 
 	euc_tw2mic(src, dest, len);
 
-	PG_RETURN_INT32(0);
+	PG_RETURN_VOID();
 }
 
 Datum
@@ -112,11 +112,11 @@ mic_to_euc_tw(PG_FUNCTION_ARGS)
 
 	Assert(PG_GETARG_INT32(0) == PG_MULE_INTERNAL);
 	Assert(PG_GETARG_INT32(1) == PG_EUC_TW);
-	Assert(len > 0);
+	Assert(len >= 0);
 
 	mic2big5(src, dest, len);
 
-	PG_RETURN_INT32(0);
+	PG_RETURN_VOID();
 }
 
 Datum
@@ -128,11 +128,11 @@ big5_to_mic(PG_FUNCTION_ARGS)
 
 	Assert(PG_GETARG_INT32(0) == PG_BIG5);
 	Assert(PG_GETARG_INT32(1) == PG_MULE_INTERNAL);
-	Assert(len > 0);
+	Assert(len >= 0);
 
 	big52mic(src, dest, len);
 
-	PG_RETURN_INT32(0);
+	PG_RETURN_VOID();
 }
 
 Datum
@@ -144,11 +144,11 @@ mic_to_big5(PG_FUNCTION_ARGS)
 
 	Assert(PG_GETARG_INT32(0) == PG_MULE_INTERNAL);
 	Assert(PG_GETARG_INT32(1) == PG_BIG5);
-	Assert(len > 0);
+	Assert(len >= 0);
 
 	mic2big5(src, dest, len);
 
-	PG_RETURN_INT32(0);
+	PG_RETURN_VOID();
 }
 
 /*
@@ -159,7 +159,7 @@ euc_tw2mic(unsigned char *euc, unsigned char *p, int len)
 {
 	int			c1;
 
-	while (len > 0 && (c1 = *euc++))
+	while (len >= 0 && (c1 = *euc++))
 	{
 		if (c1 == SS2)
 		{
@@ -201,7 +201,7 @@ mic2euc_tw(unsigned char *mic, unsigned char *p, int len)
 {
 	int			c1;
 
-	while (len > 0 && (c1 = *mic))
+	while (len >= 0 && (c1 = *mic))
 	{
 		len -= pg_mic_mblen(mic++);
 
@@ -250,7 +250,7 @@ big52mic(unsigned char *big5, unsigned char *p, int len)
 	char		bogusBuf[3];
 	int			i;
 
-	while (len > 0 && (c1 = *big5++))
+	while (len >= 0 && (c1 = *big5++))
 	{
 		if (c1 <= 0x7fU)
 		{						/* ASCII */
@@ -302,7 +302,7 @@ mic2big5(unsigned char *mic, unsigned char *p, int len)
 	unsigned short big5buf,
 				cnsBuf;
 
-	while (len > 0 && (c1 = *mic))
+	while (len >= 0 && (c1 = *mic))
 	{
 		l = pg_mic_mblen(mic++);
 		len -= l;

src/backend/utils/mb/conversion_procs/latin2_and_win1250/latin2_and_win1250.c

@@ -6,7 +6,7 @@
  * Portions Copyright (c) 1994, Regents of the University of California
  *
  * IDENTIFICATION
- *	  $Header: /cvsroot/pgsql/src/backend/utils/mb/conversion_procs/latin2_and_win1250/latin2_and_win1250.c,v 1.3 2002/09/04 20:31:31 momjian Exp $
+ *	  $Header: /cvsroot/pgsql/src/backend/utils/mb/conversion_procs/latin2_and_win1250/latin2_and_win1250.c,v 1.4 2002/09/13 06:41:17 ishii Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -56,11 +56,11 @@ latin2_to_mic(PG_FUNCTION_ARGS)
 
 	Assert(PG_GETARG_INT32(0) == PG_LATIN2);
 	Assert(PG_GETARG_INT32(1) == PG_MULE_INTERNAL);
-	Assert(len > 0);
+	Assert(len >= 0);
 
 	latin22mic(src, dest, len);
 
-	PG_RETURN_INT32(0);
+	PG_RETURN_VOID();
 }
 
 Datum
@@ -72,11 +72,11 @@ mic_to_latin2(PG_FUNCTION_ARGS)
 
 	Assert(PG_GETARG_INT32(0) == PG_MULE_INTERNAL);
 	Assert(PG_GETARG_INT32(1) == PG_LATIN2);
-	Assert(len > 0);
+	Assert(len >= 0);
 
 	mic2latin2(src, dest, len);
 
-	PG_RETURN_INT32(0);
+	PG_RETURN_VOID();
 }
 
 Datum
@@ -88,11 +88,11 @@ win1250_to_mic(PG_FUNCTION_ARGS)
 
 	Assert(PG_GETARG_INT32(0) == PG_WIN1250);
 	Assert(PG_GETARG_INT32(1) == PG_MULE_INTERNAL);
-	Assert(len > 0);
+	Assert(len >= 0);
 
 	win12502mic(src, dest, len);
 
-	PG_RETURN_INT32(0);
+	PG_RETURN_VOID();
 }
 
 Datum
@@ -104,11 +104,11 @@ mic_to_win1250(PG_FUNCTION_ARGS)
 
 	Assert(PG_GETARG_INT32(0) == PG_MULE_INTERNAL);
 	Assert(PG_GETARG_INT32(1) == PG_WIN1250);
-	Assert(len > 0);
+	Assert(len >= 0);
 
 	mic2win1250(src, dest, len);
 
-	PG_RETURN_INT32(0);
+	PG_RETURN_VOID();
 }
 
 Datum
@@ -121,14 +121,14 @@ latin2_to_win1250(PG_FUNCTION_ARGS)
 
 	Assert(PG_GETARG_INT32(0) == PG_LATIN2);
 	Assert(PG_GETARG_INT32(1) == PG_WIN1250);
-	Assert(len > 0);
+	Assert(len >= 0);
 
 	buf = palloc(len * ENCODING_GROWTH_RATE);
 	latin22mic(src, buf, len);
 	mic2win1250(buf, dest, strlen(buf));
 	pfree(buf);
 
-	PG_RETURN_INT32(0);
+	PG_RETURN_VOID();
 }
 
 Datum
@@ -141,14 +141,14 @@ win1250_to_latin2(PG_FUNCTION_ARGS)
 
 	Assert(PG_GETARG_INT32(0) == PG_WIN1250);
 	Assert(PG_GETARG_INT32(1) == PG_LATIN2);
-	Assert(len > 0);
+	Assert(len >= 0);
 
 	buf = palloc(len * ENCODING_GROWTH_RATE);
 	win12502mic(src, buf, len);
 	mic2latin2(buf, dest, strlen(buf));
 	pfree(buf);
 
-	PG_RETURN_INT32(0);
+	PG_RETURN_VOID();
 }
 
 static void

src/backend/utils/mb/conversion_procs/latin_and_mic/latin_and_mic.c

@@ -6,7 +6,7 @@
  * Portions Copyright (c) 1994, Regents of the University of California
  *
  * IDENTIFICATION
- *	  $Header: /cvsroot/pgsql/src/backend/utils/mb/conversion_procs/latin_and_mic/latin_and_mic.c,v 1.3 2002/09/04 20:31:31 momjian Exp $
+ *	  $Header: /cvsroot/pgsql/src/backend/utils/mb/conversion_procs/latin_and_mic/latin_and_mic.c,v 1.4 2002/09/13 06:41:17 ishii Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -56,11 +56,11 @@ latin1_to_mic(PG_FUNCTION_ARGS)
 
 	Assert(PG_GETARG_INT32(0) == PG_LATIN1);
 	Assert(PG_GETARG_INT32(1) == PG_MULE_INTERNAL);
-	Assert(len > 0);
+	Assert(len >= 0);
 
 	latin12mic(src, dest, len);
 
-	PG_RETURN_INT32(0);
+	PG_RETURN_VOID();
 }
 
 Datum
@@ -72,11 +72,11 @@ mic_to_latin1(PG_FUNCTION_ARGS)
 
 	Assert(PG_GETARG_INT32(0) == PG_MULE_INTERNAL);
 	Assert(PG_GETARG_INT32(1) == PG_LATIN1);
-	Assert(len > 0);
+	Assert(len >= 0);
 
 	mic2latin1(src, dest, len);
 
-	PG_RETURN_INT32(0);
+	PG_RETURN_VOID();
 }
 
 Datum
@@ -88,11 +88,11 @@ latin3_to_mic(PG_FUNCTION_ARGS)
 
 	Assert(PG_GETARG_INT32(0) == PG_LATIN3);
 	Assert(PG_GETARG_INT32(1) == PG_MULE_INTERNAL);
-	Assert(len > 0);
+	Assert(len >= 0);
 
 	latin32mic(src, dest, len);
 
-	PG_RETURN_INT32(0);
+	PG_RETURN_VOID();
 }
 
 Datum
@@ -104,11 +104,11 @@ mic_to_latin3(PG_FUNCTION_ARGS)
 
 	Assert(PG_GETARG_INT32(0) == PG_MULE_INTERNAL);
 	Assert(PG_GETARG_INT32(1) == PG_LATIN3);
-	Assert(len > 0);
+	Assert(len >= 0);
 
 	mic2latin3(src, dest, len);
 
-	PG_RETURN_INT32(0);
+	PG_RETURN_VOID();
 }
 
 Datum
@@ -120,11 +120,11 @@ latin4_to_mic(PG_FUNCTION_ARGS)
 
 	Assert(PG_GETARG_INT32(0) == PG_LATIN4);
 	Assert(PG_GETARG_INT32(1) == PG_MULE_INTERNAL);
-	Assert(len > 0);
+	Assert(len >= 0);
 
 	latin42mic(src, dest, len);
 
-	PG_RETURN_INT32(0);
+	PG_RETURN_VOID();
 }
 
 Datum
@@ -136,11 +136,11 @@ mic_to_latin4(PG_FUNCTION_ARGS)
 
 	Assert(PG_GETARG_INT32(0) == PG_MULE_INTERNAL);
 	Assert(PG_GETARG_INT32(1) == PG_LATIN4);
-	Assert(len > 0);
+	Assert(len >= 0);
 
 	mic2latin4(src, dest, len);
 
-	PG_RETURN_INT32(0);
+	PG_RETURN_VOID();
 }
 
 static void

src/backend/utils/mb/conversion_procs/utf8_and_ascii/utf8_and_ascii.c

@@ -6,7 +6,7 @@
  * Portions Copyright (c) 1994, Regents of the University of California
  *
  * IDENTIFICATION
- *	  $Header: /cvsroot/pgsql/src/backend/utils/mb/conversion_procs/utf8_and_ascii/utf8_and_ascii.c,v 1.3 2002/09/04 20:31:31 momjian Exp $
+ *	  $Header: /cvsroot/pgsql/src/backend/utils/mb/conversion_procs/utf8_and_ascii/utf8_and_ascii.c,v 1.4 2002/09/13 06:41:17 ishii Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -41,11 +41,11 @@ ascii_to_utf8(PG_FUNCTION_ARGS)
 
 	Assert(PG_GETARG_INT32(0) == PG_SQL_ASCII);
 	Assert(PG_GETARG_INT32(1) == PG_UTF8);
-	Assert(len > 0);
+	Assert(len >= 0);
 
 	pg_ascii2mic(src, dest, len);
 
-	PG_RETURN_INT32(0);
+	PG_RETURN_VOID();
 }
 
 Datum
@@ -57,9 +57,9 @@ utf8_to_ascii(PG_FUNCTION_ARGS)
 
 	Assert(PG_GETARG_INT32(0) == PG_UTF8);
 	Assert(PG_GETARG_INT32(1) == PG_SQL_ASCII);
-	Assert(len > 0);
+	Assert(len >= 0);
 
 	pg_mic2ascii(src, dest, len);
 
-	PG_RETURN_INT32(0);
+	PG_RETURN_VOID();
 }

src/backend/utils/mb/conversion_procs/utf8_and_big5/utf8_and_big5.c

@@ -6,7 +6,7 @@
  * Portions Copyright (c) 1994, Regents of the University of California
  *
  * IDENTIFICATION
- *	  $Header: /cvsroot/pgsql/src/backend/utils/mb/conversion_procs/utf8_and_big5/utf8_and_big5.c,v 1.3 2002/09/04 20:31:32 momjian Exp $
+ *	  $Header: /cvsroot/pgsql/src/backend/utils/mb/conversion_procs/utf8_and_big5/utf8_and_big5.c,v 1.4 2002/09/13 06:41:17 ishii Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -42,12 +42,12 @@ big5_to_utf8(PG_FUNCTION_ARGS)
 
 	Assert(PG_GETARG_INT32(0) == PG_BIG5);
 	Assert(PG_GETARG_INT32(1) == PG_UTF8);
-	Assert(len > 0);
+	Assert(len >= 0);
 
 	LocalToUtf(src, dest, LUmapBIG5,
 			   sizeof(LUmapBIG5) / sizeof(pg_local_to_utf), PG_BIG5, len);
 
-	PG_RETURN_INT32(0);
+	PG_RETURN_VOID();
 }
 
 Datum
@@ -59,10 +59,10 @@ utf8_to_big5(PG_FUNCTION_ARGS)
 
 	Assert(PG_GETARG_INT32(0) == PG_UTF8);
 	Assert(PG_GETARG_INT32(1) == PG_BIG5);
-	Assert(len > 0);
+	Assert(len >= 0);
 
 	UtfToLocal(src, dest, ULmapBIG5,
 			   sizeof(ULmapBIG5) / sizeof(pg_utf_to_local), len);
 
-	PG_RETURN_INT32(0);
+	PG_RETURN_VOID();
 }

src/backend/utils/mb/conversion_procs/utf8_and_cyrillic/utf8_and_cyrillic.c

@@ -6,7 +6,7 @@
  * Portions Copyright (c) 1994, Regents of the University of California
  *
  * IDENTIFICATION
- *	  $Header: /cvsroot/pgsql/src/backend/utils/mb/conversion_procs/utf8_and_cyrillic/utf8_and_cyrillic.c,v 1.3 2002/09/04 20:31:32 momjian Exp $
+ *	  $Header: /cvsroot/pgsql/src/backend/utils/mb/conversion_procs/utf8_and_cyrillic/utf8_and_cyrillic.c,v 1.4 2002/09/13 06:41:17 ishii Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -55,12 +55,12 @@ utf8_to_koi8r(PG_FUNCTION_ARGS)
 
 	Assert(PG_GETARG_INT32(0) == PG_UTF8);
 	Assert(PG_GETARG_INT32(1) == PG_KOI8R);
-	Assert(len > 0);
+	Assert(len >= 0);
 
 	UtfToLocal(src, dest, ULmap_KOI8R,
 			   sizeof(ULmap_KOI8R) / sizeof(pg_utf_to_local), len);
 
-	PG_RETURN_INT32(0);
+	PG_RETURN_VOID();
 }
 
 Datum
@@ -72,12 +72,12 @@ koi8r_to_utf8(PG_FUNCTION_ARGS)
 
 	Assert(PG_GETARG_INT32(0) == PG_KOI8R);
 	Assert(PG_GETARG_INT32(1) == PG_UTF8);
-	Assert(len > 0);
+	Assert(len >= 0);
 
 	LocalToUtf(src, dest, LUmapKOI8R,
 			sizeof(LUmapKOI8R) / sizeof(pg_local_to_utf), PG_KOI8R, len);
 
-	PG_RETURN_INT32(0);
+	PG_RETURN_VOID();
 }
 
 Datum
@@ -89,12 +89,12 @@ utf8_to_win1251(PG_FUNCTION_ARGS)
 
 	Assert(PG_GETARG_INT32(0) == PG_UTF8);
 	Assert(PG_GETARG_INT32(1) == PG_WIN1251);
-	Assert(len > 0);
+	Assert(len >= 0);
 
 	UtfToLocal(src, dest, ULmap_WIN1251,
 			   sizeof(ULmap_WIN1251) / sizeof(pg_utf_to_local), len);
 
-	PG_RETURN_INT32(0);
+	PG_RETURN_VOID();
 }
 
 Datum
@@ -106,12 +106,12 @@ win1251_to_utf8(PG_FUNCTION_ARGS)
 
 	Assert(PG_GETARG_INT32(0) == PG_WIN1251);
 	Assert(PG_GETARG_INT32(1) == PG_UTF8);
-	Assert(len > 0);
+	Assert(len >= 0);
 
 	LocalToUtf(src, dest, LUmapWIN1251,
 		sizeof(LUmapWIN1251) / sizeof(pg_local_to_utf), PG_WIN1251, len);
 
-	PG_RETURN_INT32(0);
+	PG_RETURN_VOID();
 }
 
 Datum
@@ -123,12 +123,12 @@ utf8_to_alt(PG_FUNCTION_ARGS)
 
 	Assert(PG_GETARG_INT32(0) == PG_UTF8);
 	Assert(PG_GETARG_INT32(1) == PG_ALT);
-	Assert(len > 0);
+	Assert(len >= 0);
 
 	UtfToLocal(src, dest, ULmap_ALT,
 			   sizeof(ULmap_ALT) / sizeof(pg_utf_to_local), len);
 
-	PG_RETURN_INT32(0);
+	PG_RETURN_VOID();
 }
 
 Datum
@@ -140,10 +140,10 @@ alt_to_utf8(PG_FUNCTION_ARGS)
 
 	Assert(PG_GETARG_INT32(0) == PG_ALT);
 	Assert(PG_GETARG_INT32(1) == PG_UTF8);
-	Assert(len > 0);
+	Assert(len >= 0);
 
 	LocalToUtf(src, dest, LUmapALT,
 			   sizeof(LUmapALT) / sizeof(pg_local_to_utf), PG_ALT, len);
 
-	PG_RETURN_INT32(0);
+	PG_RETURN_VOID();
 }

src/backend/utils/mb/conversion_procs/utf8_and_euc_cn/utf8_and_euc_cn.c

@@ -6,7 +6,7 @@
  * Portions Copyright (c) 1994, Regents of the University of California
  *
  * IDENTIFICATION
- *	  $Header: /cvsroot/pgsql/src/backend/utils/mb/conversion_procs/utf8_and_euc_cn/utf8_and_euc_cn.c,v 1.3 2002/09/04 20:31:32 momjian Exp $
+ *	  $Header: /cvsroot/pgsql/src/backend/utils/mb/conversion_procs/utf8_and_euc_cn/utf8_and_euc_cn.c,v 1.4 2002/09/13 06:41:17 ishii Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -42,12 +42,12 @@ euc_cn_to_utf8(PG_FUNCTION_ARGS)
 
 	Assert(PG_GETARG_INT32(0) == PG_EUC_CN);
 	Assert(PG_GETARG_INT32(1) == PG_UTF8);
-	Assert(len > 0);
+	Assert(len >= 0);
 
 	LocalToUtf(src, dest, LUmapEUC_CN,
 		  sizeof(LUmapEUC_CN) / sizeof(pg_local_to_utf), PG_EUC_CN, len);
 
-	PG_RETURN_INT32(0);
+	PG_RETURN_VOID();
 }
 
 Datum
@@ -59,10 +59,10 @@ utf8_to_euc_cn(PG_FUNCTION_ARGS)
 
 	Assert(PG_GETARG_INT32(0) == PG_UTF8);
 	Assert(PG_GETARG_INT32(1) == PG_EUC_CN);
-	Assert(len > 0);
+	Assert(len >= 0);
 
 	UtfToLocal(src, dest, ULmapEUC_CN,
 			   sizeof(ULmapEUC_CN) / sizeof(pg_utf_to_local), len);
 
-	PG_RETURN_INT32(0);
+	PG_RETURN_VOID();
 }

src/backend/utils/mb/conversion_procs/utf8_and_euc_jp/utf8_and_euc_jp.c

@@ -6,7 +6,7 @@
  * Portions Copyright (c) 1994, Regents of the University of California
  *
  * IDENTIFICATION
- *	  $Header: /cvsroot/pgsql/src/backend/utils/mb/conversion_procs/utf8_and_euc_jp/utf8_and_euc_jp.c,v 1.3 2002/09/04 20:31:32 momjian Exp $
+ *	  $Header: /cvsroot/pgsql/src/backend/utils/mb/conversion_procs/utf8_and_euc_jp/utf8_and_euc_jp.c,v 1.4 2002/09/13 06:41:17 ishii Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -42,12 +42,12 @@ euc_jp_to_utf8(PG_FUNCTION_ARGS)
 
 	Assert(PG_GETARG_INT32(0) == PG_EUC_JP);
 	Assert(PG_GETARG_INT32(1) == PG_UTF8);
-	Assert(len > 0);
+	Assert(len >= 0);
 
 	LocalToUtf(src, dest, LUmapEUC_JP,
 		  sizeof(LUmapEUC_JP) / sizeof(pg_local_to_utf), PG_EUC_JP, len);
 
-	PG_RETURN_INT32(0);
+	PG_RETURN_VOID();
 }
 
 Datum
@@ -59,10 +59,10 @@ utf8_to_euc_jp(PG_FUNCTION_ARGS)
 
 	Assert(PG_GETARG_INT32(0) == PG_UTF8);
 	Assert(PG_GETARG_INT32(1) == PG_EUC_JP);
-	Assert(len > 0);
+	Assert(len >= 0);
 
 	UtfToLocal(src, dest, ULmapEUC_JP,
 			   sizeof(ULmapEUC_JP) / sizeof(pg_utf_to_local), len);
 
-	PG_RETURN_INT32(0);
+	PG_RETURN_VOID();
 }

src/backend/utils/mb/conversion_procs/utf8_and_euc_kr/utf8_and_euc_kr.c

@@ -6,7 +6,7 @@
  * Portions Copyright (c) 1994, Regents of the University of California
  *
  * IDENTIFICATION
- *	  $Header: /cvsroot/pgsql/src/backend/utils/mb/conversion_procs/utf8_and_euc_kr/utf8_and_euc_kr.c,v 1.3 2002/09/04 20:31:32 momjian Exp $
+ *	  $Header: /cvsroot/pgsql/src/backend/utils/mb/conversion_procs/utf8_and_euc_kr/utf8_and_euc_kr.c,v 1.4 2002/09/13 06:41:17 ishii Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -42,12 +42,12 @@ euc_kr_to_utf8(PG_FUNCTION_ARGS)
 
 	Assert(PG_GETARG_INT32(0) == PG_EUC_KR);
 	Assert(PG_GETARG_INT32(1) == PG_UTF8);
-	Assert(len > 0);
+	Assert(len >= 0);
 
 	LocalToUtf(src, dest, LUmapEUC_KR,
 		  sizeof(LUmapEUC_KR) / sizeof(pg_local_to_utf), PG_EUC_KR, len);
 
-	PG_RETURN_INT32(0);
+	PG_RETURN_VOID();
 }
 
 Datum
@@ -59,10 +59,10 @@ utf8_to_euc_kr(PG_FUNCTION_ARGS)
 
 	Assert(PG_GETARG_INT32(0) == PG_UTF8);
 	Assert(PG_GETARG_INT32(1) == PG_EUC_KR);
-	Assert(len > 0);
+	Assert(len >= 0);
 
 	UtfToLocal(src, dest, ULmapEUC_KR,
 			   sizeof(ULmapEUC_KR) / sizeof(pg_utf_to_local), len);
 
-	PG_RETURN_INT32(0);
+	PG_RETURN_VOID();
 }

src/backend/utils/mb/conversion_procs/utf8_and_euc_tw/utf8_and_euc_tw.c

@@ -6,7 +6,7 @@
  * Portions Copyright (c) 1994, Regents of the University of California
  *
  * IDENTIFICATION
- *	  $Header: /cvsroot/pgsql/src/backend/utils/mb/conversion_procs/utf8_and_euc_tw/utf8_and_euc_tw.c,v 1.3 2002/09/04 20:31:32 momjian Exp $
+ *	  $Header: /cvsroot/pgsql/src/backend/utils/mb/conversion_procs/utf8_and_euc_tw/utf8_and_euc_tw.c,v 1.4 2002/09/13 06:41:17 ishii Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -42,12 +42,12 @@ euc_tw_to_utf8(PG_FUNCTION_ARGS)
 
 	Assert(PG_GETARG_INT32(0) == PG_EUC_TW);
 	Assert(PG_GETARG_INT32(1) == PG_UTF8);
-	Assert(len > 0);
+	Assert(len >= 0);
 
 	LocalToUtf(src, dest, LUmapEUC_TW,
 		  sizeof(LUmapEUC_TW) / sizeof(pg_local_to_utf), PG_EUC_TW, len);
 
-	PG_RETURN_INT32(0);
+	PG_RETURN_VOID();
 }
 
 Datum
@@ -59,10 +59,10 @@ utf8_to_euc_tw(PG_FUNCTION_ARGS)
 
 	Assert(PG_GETARG_INT32(0) == PG_UTF8);
 	Assert(PG_GETARG_INT32(1) == PG_EUC_TW);
-	Assert(len > 0);
+	Assert(len >= 0);
 
 	UtfToLocal(src, dest, ULmapEUC_TW,
 			   sizeof(ULmapEUC_TW) / sizeof(pg_utf_to_local), len);
 
-	PG_RETURN_INT32(0);
+	PG_RETURN_VOID();
 }

src/backend/utils/mb/conversion_procs/utf8_and_gb18030/utf8_and_gb18030.c

@@ -6,7 +6,7 @@
  * Portions Copyright (c) 1994, Regents of the University of California
  *
  * IDENTIFICATION
- *	  $Header: /cvsroot/pgsql/src/backend/utils/mb/conversion_procs/utf8_and_gb18030/utf8_and_gb18030.c,v 1.3 2002/09/04 20:31:32 momjian Exp $
+ *	  $Header: /cvsroot/pgsql/src/backend/utils/mb/conversion_procs/utf8_and_gb18030/utf8_and_gb18030.c,v 1.4 2002/09/13 06:41:17 ishii Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -42,12 +42,12 @@ gb18030_to_utf8(PG_FUNCTION_ARGS)
 
 	Assert(PG_GETARG_INT32(0) == PG_GB18030);
 	Assert(PG_GETARG_INT32(1) == PG_UTF8);
-	Assert(len > 0);
+	Assert(len >= 0);
 
 	LocalToUtf(src, dest, LUmapGB18030,
 		sizeof(LUmapGB18030) / sizeof(pg_local_to_utf), PG_GB18030, len);
 
-	PG_RETURN_INT32(0);
+	PG_RETURN_VOID();
 }
 
 Datum
@@ -59,10 +59,10 @@ utf8_to_gb18030(PG_FUNCTION_ARGS)
 
 	Assert(PG_GETARG_INT32(0) == PG_UTF8);
 	Assert(PG_GETARG_INT32(1) == PG_GB18030);
-	Assert(len > 0);
+	Assert(len >= 0);
 
 	UtfToLocal(src, dest, ULmapGB18030,
 			   sizeof(ULmapGB18030) / sizeof(pg_utf_to_local), len);
 
-	PG_RETURN_INT32(0);
+	PG_RETURN_VOID();
 }

src/backend/utils/mb/conversion_procs/utf8_and_gbk/utf8_and_gbk.c

@@ -6,7 +6,7 @@
  * Portions Copyright (c) 1994, Regents of the University of California
  *
  * IDENTIFICATION
- *	  $Header: /cvsroot/pgsql/src/backend/utils/mb/conversion_procs/utf8_and_gbk/utf8_and_gbk.c,v 1.3 2002/09/04 20:31:32 momjian Exp $
+ *	  $Header: /cvsroot/pgsql/src/backend/utils/mb/conversion_procs/utf8_and_gbk/utf8_and_gbk.c,v 1.4 2002/09/13 06:41:17 ishii Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -42,12 +42,12 @@ gbk_to_utf8(PG_FUNCTION_ARGS)
 
 	Assert(PG_GETARG_INT32(0) == PG_GBK);
 	Assert(PG_GETARG_INT32(1) == PG_UTF8);
-	Assert(len > 0);
+	Assert(len >= 0);
 
 	LocalToUtf(src, dest, LUmapGBK,
 			   sizeof(LUmapGBK) / sizeof(pg_local_to_utf), PG_GBK, len);
 
-	PG_RETURN_INT32(0);
+	PG_RETURN_VOID();
 }
 
 Datum
@@ -59,10 +59,10 @@ utf8_to_gbk(PG_FUNCTION_ARGS)
 
 	Assert(PG_GETARG_INT32(0) == PG_UTF8);
 	Assert(PG_GETARG_INT32(1) == PG_GBK);
-	Assert(len > 0);
+	Assert(len >= 0);
 
 	UtfToLocal(src, dest, ULmapGBK,
 			   sizeof(ULmapGBK) / sizeof(pg_utf_to_local), len);
 
-	PG_RETURN_INT32(0);
+	PG_RETURN_VOID();
 }

src/backend/utils/mb/conversion_procs/utf8_and_iso8859/utf8_and_iso8859.c

@@ -6,7 +6,7 @@
  * Portions Copyright (c) 1994, Regents of the University of California
  *
  * IDENTIFICATION
- *	  $Header: /cvsroot/pgsql/src/backend/utils/mb/conversion_procs/utf8_and_iso8859/utf8_and_iso8859.c,v 1.3 2002/09/04 20:31:32 momjian Exp $
+ *	  $Header: /cvsroot/pgsql/src/backend/utils/mb/conversion_procs/utf8_and_iso8859/utf8_and_iso8859.c,v 1.4 2002/09/13 06:41:17 ishii Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -133,11 +133,11 @@ iso8859_to_utf8(PG_FUNCTION_ARGS)
 	int			len = PG_GETARG_INT32(4);
 
 	Assert(PG_GETARG_INT32(1) == PG_UTF8);
-	Assert(len > 0);
+	Assert(len >= 0);
 
 	LocalToUtf(src, dest, maps[encoding].map1, maps[encoding].size1, encoding, len);
 
-	PG_RETURN_INT32(0);
+	PG_RETURN_VOID();
 }
 
 Datum
@@ -149,9 +149,9 @@ utf8_to_iso8859(PG_FUNCTION_ARGS)
 	int			len = PG_GETARG_INT32(4);
 
 	Assert(PG_GETARG_INT32(0) == PG_UTF8);
-	Assert(len > 0);
+	Assert(len >= 0);
 
 	UtfToLocal(src, dest, maps[encoding].map2, maps[encoding].size2, len);
 
-	PG_RETURN_INT32(0);
+	PG_RETURN_VOID();
 }

src/backend/utils/mb/conversion_procs/utf8_and_iso8859_1/utf8_and_iso8859_1.c

@@ -6,7 +6,7 @@
  * Portions Copyright (c) 1994, Regents of the University of California
  *
  * IDENTIFICATION
- *	  $Header: /cvsroot/pgsql/src/backend/utils/mb/conversion_procs/utf8_and_iso8859_1/utf8_and_iso8859_1.c,v 1.3 2002/09/04 20:31:32 momjian Exp $
+ *	  $Header: /cvsroot/pgsql/src/backend/utils/mb/conversion_procs/utf8_and_iso8859_1/utf8_and_iso8859_1.c,v 1.4 2002/09/13 06:41:17 ishii Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -42,7 +42,7 @@ iso8859_1_to_utf8(PG_FUNCTION_ARGS)
 
 	Assert(PG_GETARG_INT32(0) == PG_LATIN1);
 	Assert(PG_GETARG_INT32(1) == PG_UTF8);
-	Assert(len > 0);
+	Assert(len >= 0);
 
 	while (len-- > 0 && (c = *src++))
 	{
@@ -56,7 +56,7 @@ iso8859_1_to_utf8(PG_FUNCTION_ARGS)
 	}
 	*dest = '\0';
 
-	PG_RETURN_INT32(0);
+	PG_RETURN_VOID();
 }
 
 Datum
@@ -71,9 +71,9 @@ utf8_to_iso8859_1(PG_FUNCTION_ARGS)
 
 	Assert(PG_GETARG_INT32(0) == PG_UTF8);
 	Assert(PG_GETARG_INT32(1) == PG_LATIN1);
-	Assert(len > 0);
+	Assert(len >= 0);
 
-	while (len > 0 && (c = *src++))
+	while (len >= 0 && (c = *src++))
 	{
 		if ((c & 0xe0) == 0xc0)
 		{
@@ -93,5 +93,5 @@ utf8_to_iso8859_1(PG_FUNCTION_ARGS)
 	}
 	*dest = '\0';
 
-	PG_RETURN_INT32(0);
+	PG_RETURN_VOID();
 }

src/backend/utils/mb/conversion_procs/utf8_and_johab/utf8_and_johab.c

@@ -6,7 +6,7 @@
  * Portions Copyright (c) 1994, Regents of the University of California
  *
  * IDENTIFICATION
- *	  $Header: /cvsroot/pgsql/src/backend/utils/mb/conversion_procs/utf8_and_johab/utf8_and_johab.c,v 1.3 2002/09/04 20:31:32 momjian Exp $
+ *	  $Header: /cvsroot/pgsql/src/backend/utils/mb/conversion_procs/utf8_and_johab/utf8_and_johab.c,v 1.4 2002/09/13 06:41:17 ishii Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -42,12 +42,12 @@ johab_to_utf8(PG_FUNCTION_ARGS)
 
 	Assert(PG_GETARG_INT32(0) == PG_JOHAB);
 	Assert(PG_GETARG_INT32(1) == PG_UTF8);
-	Assert(len > 0);
+	Assert(len >= 0);
 
 	LocalToUtf(src, dest, LUmapJOHAB,
 			sizeof(LUmapJOHAB) / sizeof(pg_local_to_utf), PG_JOHAB, len);
 
-	PG_RETURN_INT32(0);
+	PG_RETURN_VOID();
 }
 
 Datum
@@ -59,10 +59,10 @@ utf8_to_johab(PG_FUNCTION_ARGS)
 
 	Assert(PG_GETARG_INT32(0) == PG_UTF8);
 	Assert(PG_GETARG_INT32(1) == PG_JOHAB);
-	Assert(len > 0);
+	Assert(len >= 0);
 
 	UtfToLocal(src, dest, ULmapJOHAB,
 			   sizeof(ULmapJOHAB) / sizeof(pg_utf_to_local), len);
 
-	PG_RETURN_INT32(0);
+	PG_RETURN_VOID();
 }

src/backend/utils/mb/conversion_procs/utf8_and_sjis/utf8_and_sjis.c

@@ -6,7 +6,7 @@
  * Portions Copyright (c) 1994, Regents of the University of California
  *
  * IDENTIFICATION
- *	  $Header: /cvsroot/pgsql/src/backend/utils/mb/conversion_procs/utf8_and_sjis/utf8_and_sjis.c,v 1.3 2002/09/04 20:31:32 momjian Exp $
+ *	  $Header: /cvsroot/pgsql/src/backend/utils/mb/conversion_procs/utf8_and_sjis/utf8_and_sjis.c,v 1.4 2002/09/13 06:41:17 ishii Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -42,12 +42,12 @@ sjis_to_utf8(PG_FUNCTION_ARGS)
 
 	Assert(PG_GETARG_INT32(0) == PG_SJIS);
 	Assert(PG_GETARG_INT32(1) == PG_UTF8);
-	Assert(len > 0);
+	Assert(len >= 0);
 
 	LocalToUtf(src, dest, LUmapSJIS,
 			   sizeof(LUmapSJIS) / sizeof(pg_local_to_utf), PG_SJIS, len);
 
-	PG_RETURN_INT32(0);
+	PG_RETURN_VOID();
 }
 
 Datum
@@ -59,10 +59,10 @@ utf8_to_sjis(PG_FUNCTION_ARGS)
 
 	Assert(PG_GETARG_INT32(0) == PG_UTF8);
 	Assert(PG_GETARG_INT32(1) == PG_SJIS);
-	Assert(len > 0);
+	Assert(len >= 0);
 
 	UtfToLocal(src, dest, ULmapSJIS,
 			   sizeof(ULmapSJIS) / sizeof(pg_utf_to_local), len);
 
-	PG_RETURN_INT32(0);
+	PG_RETURN_VOID();
 }

src/backend/utils/mb/conversion_procs/utf8_and_tcvn/utf8_and_tcvn.c

@@ -6,7 +6,7 @@
  * Portions Copyright (c) 1994, Regents of the University of California
  *
  * IDENTIFICATION
- *	  $Header: /cvsroot/pgsql/src/backend/utils/mb/conversion_procs/utf8_and_tcvn/Attic/utf8_and_tcvn.c,v 1.3 2002/09/04 20:31:32 momjian Exp $
+ *	  $Header: /cvsroot/pgsql/src/backend/utils/mb/conversion_procs/utf8_and_tcvn/Attic/utf8_and_tcvn.c,v 1.4 2002/09/13 06:41:17 ishii Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -42,12 +42,12 @@ tcvn_to_utf8(PG_FUNCTION_ARGS)
 
 	Assert(PG_GETARG_INT32(0) == PG_TCVN);
 	Assert(PG_GETARG_INT32(1) == PG_UTF8);
-	Assert(len > 0);
+	Assert(len >= 0);
 
 	LocalToUtf(src, dest, LUmapTCVN,
 			   sizeof(LUmapTCVN) / sizeof(pg_local_to_utf), PG_TCVN, len);
 
-	PG_RETURN_INT32(0);
+	PG_RETURN_VOID();
 }
 
 Datum
@@ -59,10 +59,10 @@ utf8_to_tcvn(PG_FUNCTION_ARGS)
 
 	Assert(PG_GETARG_INT32(0) == PG_UTF8);
 	Assert(PG_GETARG_INT32(1) == PG_TCVN);
-	Assert(len > 0);
+	Assert(len >= 0);
 
 	UtfToLocal(src, dest, ULmapTCVN,
 			   sizeof(ULmapTCVN) / sizeof(pg_utf_to_local), len);
 
-	PG_RETURN_INT32(0);
+	PG_RETURN_VOID();
 }

src/backend/utils/mb/conversion_procs/utf8_and_uhc/utf8_and_uhc.c

@@ -6,7 +6,7 @@
  * Portions Copyright (c) 1994, Regents of the University of California
  *
  * IDENTIFICATION
- *	  $Header: /cvsroot/pgsql/src/backend/utils/mb/conversion_procs/utf8_and_uhc/utf8_and_uhc.c,v 1.3 2002/09/04 20:31:32 momjian Exp $
+ *	  $Header: /cvsroot/pgsql/src/backend/utils/mb/conversion_procs/utf8_and_uhc/utf8_and_uhc.c,v 1.4 2002/09/13 06:41:17 ishii Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -42,12 +42,12 @@ uhc_to_utf8(PG_FUNCTION_ARGS)
 
 	Assert(PG_GETARG_INT32(0) == PG_UHC);
 	Assert(PG_GETARG_INT32(1) == PG_UTF8);
-	Assert(len > 0);
+	Assert(len >= 0);
 
 	LocalToUtf(src, dest, LUmapUHC,
 			   sizeof(LUmapUHC) / sizeof(pg_local_to_utf), PG_UHC, len);
 
-	PG_RETURN_INT32(0);
+	PG_RETURN_VOID();
 }
 
 Datum
@@ -59,10 +59,10 @@ utf8_to_uhc(PG_FUNCTION_ARGS)
 
 	Assert(PG_GETARG_INT32(0) == PG_UTF8);
 	Assert(PG_GETARG_INT32(1) == PG_UHC);
-	Assert(len > 0);
+	Assert(len >= 0);
 
 	UtfToLocal(src, dest, ULmapUHC,
 			   sizeof(ULmapUHC) / sizeof(pg_utf_to_local), len);
 
-	PG_RETURN_INT32(0);
+	PG_RETURN_VOID();
 }

src/backend/utils/mb/conversion_procs/utf8_and_win1250/utf8_and_win1250.c

@@ -6,7 +6,7 @@
  * Portions Copyright (c) 1994, Regents of the University of California
  *
  * IDENTIFICATION
- *	  $Header: /cvsroot/pgsql/src/backend/utils/mb/conversion_procs/utf8_and_win1250/Attic/utf8_and_win1250.c,v 1.3 2002/09/04 20:31:32 momjian Exp $
+ *	  $Header: /cvsroot/pgsql/src/backend/utils/mb/conversion_procs/utf8_and_win1250/Attic/utf8_and_win1250.c,v 1.4 2002/09/13 06:41:18 ishii Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -43,12 +43,12 @@ utf_to_win1250(PG_FUNCTION_ARGS)
 
 	Assert(PG_GETARG_INT32(0) == PG_UTF8);
 	Assert(PG_GETARG_INT32(1) == PG_WIN1250);
-	Assert(len > 0);
+	Assert(len >= 0);
 
 	UtfToLocal(src, dest, ULmapWIN1250,
 			   sizeof(ULmapWIN1250) / sizeof(pg_utf_to_local), len);
 
-	PG_RETURN_INT32(0);
+	PG_RETURN_VOID();
 }
 
 Datum
@@ -60,10 +60,10 @@ win1250_to_utf(PG_FUNCTION_ARGS)
 
 	Assert(PG_GETARG_INT32(0) == PG_WIN1250);
 	Assert(PG_GETARG_INT32(1) == PG_UTF8);
-	Assert(len > 0);
+	Assert(len >= 0);
 
 	LocalToUtf(src, dest, LUmapWIN1250,
 		sizeof(LUmapWIN1250) / sizeof(pg_local_to_utf), PG_WIN1250, len);
 
-	PG_RETURN_INT32(0);
+	PG_RETURN_VOID();
 }

src/backend/utils/mb/conversion_procs/utf8_and_win1256/utf8_and_win1256.c

@@ -6,7 +6,7 @@
  * Portions Copyright (c) 1994, Regents of the University of California
  *
  * IDENTIFICATION
- *	  $Header: /cvsroot/pgsql/src/backend/utils/mb/conversion_procs/utf8_and_win1256/Attic/utf8_and_win1256.c,v 1.3 2002/09/04 20:31:32 momjian Exp $
+ *	  $Header: /cvsroot/pgsql/src/backend/utils/mb/conversion_procs/utf8_and_win1256/Attic/utf8_and_win1256.c,v 1.4 2002/09/13 06:41:18 ishii Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -43,12 +43,12 @@ utf_to_win1256(PG_FUNCTION_ARGS)
 
 	Assert(PG_GETARG_INT32(0) == PG_UTF8);
 	Assert(PG_GETARG_INT32(1) == PG_WIN1256);
-	Assert(len > 0);
+	Assert(len >= 0);
 
 	UtfToLocal(src, dest, ULmapWIN1256,
 			   sizeof(ULmapWIN1256) / sizeof(pg_utf_to_local), len);
 
-	PG_RETURN_INT32(0);
+	PG_RETURN_VOID();
 }
 
 Datum
@@ -60,10 +60,10 @@ win1256_to_utf(PG_FUNCTION_ARGS)
 
 	Assert(PG_GETARG_INT32(0) == PG_WIN1256);
 	Assert(PG_GETARG_INT32(1) == PG_UTF8);
-	Assert(len > 0);
+	Assert(len >= 0);
 
 	LocalToUtf(src, dest, LUmapWIN1256,
 		sizeof(LUmapWIN1256) / sizeof(pg_local_to_utf), PG_WIN1256, len);
 
-	PG_RETURN_INT32(0);
+	PG_RETURN_VOID();
 }

src/backend/utils/mb/conversion_procs/utf8_and_win874/utf8_and_win874.c

@@ -6,7 +6,7 @@
  * Portions Copyright (c) 1994, Regents of the University of California
  *
  * IDENTIFICATION
- *	  $Header: /cvsroot/pgsql/src/backend/utils/mb/conversion_procs/utf8_and_win874/Attic/utf8_and_win874.c,v 1.3 2002/09/04 20:31:32 momjian Exp $
+ *	  $Header: /cvsroot/pgsql/src/backend/utils/mb/conversion_procs/utf8_and_win874/Attic/utf8_and_win874.c,v 1.4 2002/09/13 06:41:18 ishii Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -43,12 +43,12 @@ utf_to_win874(PG_FUNCTION_ARGS)
 
 	Assert(PG_GETARG_INT32(0) == PG_UTF8);
 	Assert(PG_GETARG_INT32(1) == PG_WIN874);
-	Assert(len > 0);
+	Assert(len >= 0);
 
 	UtfToLocal(src, dest, ULmapWIN874,
 			   sizeof(ULmapWIN874) / sizeof(pg_utf_to_local), len);
 
-	PG_RETURN_INT32(0);
+	PG_RETURN_VOID();
 }
 
 Datum
@@ -60,10 +60,10 @@ win874_to_utf(PG_FUNCTION_ARGS)
 
 	Assert(PG_GETARG_INT32(0) == PG_WIN874);
 	Assert(PG_GETARG_INT32(1) == PG_UTF8);
-	Assert(len > 0);
+	Assert(len >= 0);
 
 	LocalToUtf(src, dest, LUmapWIN874,
 		  sizeof(LUmapWIN874) / sizeof(pg_local_to_utf), PG_WIN874, len);
 
-	PG_RETURN_INT32(0);
+	PG_RETURN_VOID();
 }