Change argument type of pq_sendbytes from char * to void *

This is a follow-up to 1f605b82ba.  It
allows getting rid of further casts at call sites.

Reviewed-by: Corey Huinker <corey.huinker@gmail.com>
Discussion: https://www.postgresql.org/message-id/783a4edb-84f9-6df2-7470-2ef5ccc6607a@enterprisedb.com

src/backend/libpq/pqformat.c

@@ -123,7 +123,7 @@ pq_beginmessage_reuse(StringInfo buf, char msgtype)
  * --------------------------------
  */
 void
-pq_sendbytes(StringInfo buf, const char *data, int datalen)
+pq_sendbytes(StringInfo buf, const void *data, int datalen)
 {
 	/* use variant that maintains a trailing null-byte, out of caution */
 	appendBinaryStringInfo(buf, data, datalen);

src/backend/utils/adt/array_userfuncs.c

@@ -654,7 +654,7 @@ array_agg_serialize(PG_FUNCTION_ARGS)
 	pq_sendbyte(&buf, state->typalign);
 
 	/* dnulls */
-	pq_sendbytes(&buf, (char *) state->dnulls, sizeof(bool) * state->nelems);
+	pq_sendbytes(&buf, state->dnulls, sizeof(bool) * state->nelems);
 
 	/*
 	 * dvalues.  By agreement with array_agg_deserialize, when the element
@@ -664,8 +664,7 @@ array_agg_serialize(PG_FUNCTION_ARGS)
 	 * must be sent first).
 	 */
 	if (state->typbyval)
-		pq_sendbytes(&buf, (char *) state->dvalues,
-					 sizeof(Datum) * state->nelems);
+		pq_sendbytes(&buf, state->dvalues, sizeof(Datum) * state->nelems);
 	else
 	{
 		SerialIOData *iodata;
@@ -1097,7 +1096,7 @@ array_agg_array_serialize(PG_FUNCTION_ARGS)
 	if (state->nullbitmap)
 	{
 		Assert(state->aitems > 0);
-		pq_sendbytes(&buf, (char *) state->nullbitmap, (state->aitems + 7) / 8);
+		pq_sendbytes(&buf, state->nullbitmap, (state->aitems + 7) / 8);
 	}
 
 	/* nitems */
@@ -1107,10 +1106,10 @@ array_agg_array_serialize(PG_FUNCTION_ARGS)
 	pq_sendint32(&buf, state->ndims);
 
 	/* dims: XXX should we just send ndims elements? */
-	pq_sendbytes(&buf, (char *) state->dims, sizeof(state->dims));
+	pq_sendbytes(&buf, state->dims, sizeof(state->dims));
 
 	/* lbs */
-	pq_sendbytes(&buf, (char *) state->lbs, sizeof(state->lbs));
+	pq_sendbytes(&buf, state->lbs, sizeof(state->lbs));
 
 	result = pq_endtypsend(&buf);
 

src/backend/utils/adt/uuid.c

@@ -154,7 +154,7 @@ uuid_send(PG_FUNCTION_ARGS)
 	StringInfoData buffer;
 
 	pq_begintypsend(&buffer);
-	pq_sendbytes(&buffer, (char *) uuid->data, UUID_LEN);
+	pq_sendbytes(&buffer, uuid->data, UUID_LEN);
 	PG_RETURN_BYTEA_P(pq_endtypsend(&buffer));
 }
 

src/backend/utils/adt/varbit.c

@@ -685,7 +685,7 @@ varbit_send(PG_FUNCTION_ARGS)
 
 	pq_begintypsend(&buf);
 	pq_sendint32(&buf, VARBITLEN(s));
-	pq_sendbytes(&buf, (char *) VARBITS(s), VARBITBYTES(s));
+	pq_sendbytes(&buf, VARBITS(s), VARBITBYTES(s));
 	PG_RETURN_BYTEA_P(pq_endtypsend(&buf));
 }
 

src/include/libpq/pqformat.h

@@ -22,7 +22,7 @@ extern void pq_beginmessage_reuse(StringInfo buf, char msgtype);
 extern void pq_endmessage(StringInfo buf);
 extern void pq_endmessage_reuse(StringInfo buf);
 
-extern void pq_sendbytes(StringInfo buf, const char *data, int datalen);
+extern void pq_sendbytes(StringInfo buf, const void *data, int datalen);
 extern void pq_sendcountedtext(StringInfo buf, const char *str, int slen,
 							   bool countincludesself);
 extern void pq_sendtext(StringInfo buf, const char *str, int slen);