Remove unnecessary (char *) casts [mem]

Remove (char *) casts around memory functions such as memcmp(),
memcpy(), or memset() where the cast is useless.  Since these
functions don't take char * arguments anyway, these casts are at best
complicated casts to (void *), about which see commit 7f798ac.

Reviewed-by: Dagfinn Ilmari Mannsåker <[email protected]>
Discussion: https://www.postgresql.org/message-id/flat/fd1fcedb-3492-4fc8-9e3e-74b97f2db6c7%40eisentraut.org

Author: petere

contrib/pg_trgm/trgm_gist.c

@@ -228,7 +228,7 @@ gtrgm_consistent(PG_FUNCTION_ARGS)
 	if (cache == NULL ||
 		cache->strategy != strategy ||
 		VARSIZE(cache->query) != querysize ||
-		memcmp((char *) cache->query, (char *) query, querysize) != 0)
+		memcmp(cache->query, query, querysize) != 0)
 	{
 		gtrgm_consistent_cache *newcache;
 		TrgmPackedGraph *graph = NULL;
@@ -284,12 +284,12 @@ gtrgm_consistent(PG_FUNCTION_ARGS)
 		newcache->strategy = strategy;
 		newcache->query = (text *)
 			((char *) newcache + MAXALIGN(sizeof(gtrgm_consistent_cache)));
-		memcpy((char *) newcache->query, (char *) query, querysize);
+		memcpy(newcache->query, query, querysize);
 		if (qtrg)
 		{
 			newcache->trigrams = (TRGM *)
 				((char *) newcache->query + MAXALIGN(querysize));
-			memcpy((char *) newcache->trigrams, (char *) qtrg, qtrgsize);
+			memcpy((char *) newcache->trigrams, qtrg, qtrgsize);
 			/* release qtrg in case it was made in fn_mcxt */
 			pfree(qtrg);
 		}

contrib/xml2/xpath.c

@@ -278,8 +278,8 @@ xpath_string(PG_FUNCTION_ARGS)
 	/* We could try casting to string using the libxml function? */
 
 	xpath = (xmlChar *) palloc(pathsize + 9);
-	memcpy((char *) xpath, "string(", 7);
-	memcpy((char *) (xpath + 7), VARDATA_ANY(xpathsupp), pathsize);
+	memcpy(xpath, "string(", 7);
+	memcpy(xpath + 7, VARDATA_ANY(xpathsupp), pathsize);
 	xpath[pathsize + 7] = ')';
 	xpath[pathsize + 8] = '\0';
 

src/backend/access/common/heaptuple.c

@@ -787,7 +787,7 @@ heap_copytuple(HeapTuple tuple)
 	newTuple->t_self = tuple->t_self;
 	newTuple->t_tableOid = tuple->t_tableOid;
 	newTuple->t_data = (HeapTupleHeader) ((char *) newTuple + HEAPTUPLESIZE);
-	memcpy((char *) newTuple->t_data, (char *) tuple->t_data, tuple->t_len);
+	memcpy(newTuple->t_data, tuple->t_data, tuple->t_len);
 	return newTuple;
 }
 
@@ -813,7 +813,7 @@ heap_copytuple_with_tuple(HeapTuple src, HeapTuple dest)
 	dest->t_self = src->t_self;
 	dest->t_tableOid = src->t_tableOid;
 	dest->t_data = (HeapTupleHeader) palloc(src->t_len);
-	memcpy((char *) dest->t_data, (char *) src->t_data, src->t_len);
+	memcpy(dest->t_data, src->t_data, src->t_len);
 }
 
 /*
@@ -1097,7 +1097,7 @@ heap_copy_tuple_as_datum(HeapTuple tuple, TupleDesc tupleDesc)
 	 * the given tuple came from disk, rather than from heap_form_tuple).
 	 */
 	td = (HeapTupleHeader) palloc(tuple->t_len);
-	memcpy((char *) td, (char *) tuple->t_data, tuple->t_len);
+	memcpy(td, tuple->t_data, tuple->t_len);
 
 	HeapTupleHeaderSetDatumLength(td, tuple->t_len);
 	HeapTupleHeaderSetTypeId(td, tupleDesc->tdtypeid);

src/backend/access/heap/heapam_xlog.c

@@ -480,11 +480,11 @@ heap_xlog_insert(XLogReaderState *record)
 
 		newlen = datalen - SizeOfHeapHeader;
 		Assert(datalen > SizeOfHeapHeader && newlen <= MaxHeapTupleSize);
-		memcpy((char *) &xlhdr, data, SizeOfHeapHeader);
+		memcpy(&xlhdr, data, SizeOfHeapHeader);
 		data += SizeOfHeapHeader;
 
 		htup = &tbuf.hdr;
-		MemSet((char *) htup, 0, SizeofHeapTupleHeader);
+		MemSet(htup, 0, SizeofHeapTupleHeader);
 		/* PG73FORMAT: get bitmap [+ padding] [+ oid] + data */
 		memcpy((char *) htup + SizeofHeapTupleHeader,
 			   data,
@@ -625,10 +625,10 @@ heap_xlog_multi_insert(XLogReaderState *record)
 			newlen = xlhdr->datalen;
 			Assert(newlen <= MaxHeapTupleSize);
 			htup = &tbuf.hdr;
-			MemSet((char *) htup, 0, SizeofHeapTupleHeader);
+			MemSet(htup, 0, SizeofHeapTupleHeader);
 			/* PG73FORMAT: get bitmap [+ padding] [+ oid] + data */
 			memcpy((char *) htup + SizeofHeapTupleHeader,
-				   (char *) tupdata,
+				   tupdata,
 				   newlen);
 			tupdata += newlen;
 
@@ -854,14 +854,14 @@ heap_xlog_update(XLogReaderState *record, bool hot_update)
 			recdata += sizeof(uint16);
 		}
 
-		memcpy((char *) &xlhdr, recdata, SizeOfHeapHeader);
+		memcpy(&xlhdr, recdata, SizeOfHeapHeader);
 		recdata += SizeOfHeapHeader;
 
 		tuplen = recdata_end - recdata;
 		Assert(tuplen <= MaxHeapTupleSize);
 
 		htup = &tbuf.hdr;
-		MemSet((char *) htup, 0, SizeofHeapTupleHeader);
+		MemSet(htup, 0, SizeofHeapTupleHeader);
 
 		/*
 		 * Reconstruct the new tuple using the prefix and/or suffix from the

src/backend/access/table/toast_helper.c

@@ -75,7 +75,7 @@ toast_tuple_init(ToastTupleContext *ttc)
 			{
 				if (ttc->ttc_isnull[i] ||
 					!VARATT_IS_EXTERNAL_ONDISK(new_value) ||
-					memcmp((char *) old_value, (char *) new_value,
+					memcmp(old_value, new_value,
 						   VARSIZE_EXTERNAL(old_value)) != 0)
 				{
 					/*

src/backend/access/transam/xlog.c

@@ -2089,7 +2089,7 @@ AdvanceXLInsertBuffer(XLogRecPtr upto, TimeLineID tli, bool opportunistic)
 		 * Be sure to re-zero the buffer so that bytes beyond what we've
 		 * written will look like zeroes and not valid XLOG records...
 		 */
-		MemSet((char *) NewPage, 0, XLOG_BLCKSZ);
+		MemSet(NewPage, 0, XLOG_BLCKSZ);
 
 		/*
 		 * Fill the new page's header

src/backend/access/transam/xlogreader.c

@@ -794,7 +794,7 @@ XLogDecodeNextRecord(XLogReaderState *state, bool nonblocking)
 				readOff = ReadPageInternal(state, targetPagePtr,
 										   pageHeaderSize + len);
 
-			memcpy(buffer, (char *) contdata, len);
+			memcpy(buffer, contdata, len);
 			buffer += len;
 			gotlen += len;
 

src/backend/bootstrap/bootstrap.c

@@ -463,8 +463,8 @@ boot_openrel(char *relname)
 	{
 		if (attrtypes[i] == NULL)
 			attrtypes[i] = AllocateAttribute();
-		memmove((char *) attrtypes[i],
-				(char *) TupleDescAttr(boot_reldesc->rd_att, i),
+		memmove(attrtypes[i],
+				TupleDescAttr(boot_reldesc->rd_att, i),
 				ATTRIBUTE_FIXED_PART_SIZE);
 
 		{

src/backend/libpq/be-secure-gssapi.c

@@ -641,7 +641,7 @@ secure_open_gssapi(Port *port)
 				return -1;
 			}
 
-			memcpy(PqGSSSendBuffer, (char *) &netlen, sizeof(uint32));
+			memcpy(PqGSSSendBuffer, &netlen, sizeof(uint32));
 			PqGSSSendLength += sizeof(uint32);
 
 			memcpy(PqGSSSendBuffer + PqGSSSendLength, output.value, output.length);

src/backend/replication/logical/decode.c

@@ -1177,9 +1177,7 @@ DecodeMultiInsert(LogicalDecodingContext *ctx, XLogRecordBuffer *buf)
 
 		memset(header, 0, SizeofHeapTupleHeader);
 
-		memcpy((char *) tuple->t_data + SizeofHeapTupleHeader,
-			   (char *) data,
-			   datalen);
+		memcpy((char *) tuple->t_data + SizeofHeapTupleHeader, data, datalen);
 		header->t_infomask = xlhdr->t_infomask;
 		header->t_infomask2 = xlhdr->t_infomask2;
 		header->t_hoff = xlhdr->t_hoff;
@@ -1265,9 +1263,7 @@ DecodeXLogTuple(char *data, Size len, HeapTuple tuple)
 	tuple->t_tableOid = InvalidOid;
 
 	/* data is not stored aligned, copy to aligned storage */
-	memcpy((char *) &xlhdr,
-		   data,
-		   SizeOfHeapHeader);
+	memcpy(&xlhdr, data, SizeOfHeapHeader);
 
 	memset(header, 0, SizeofHeapTupleHeader);