From b5839a244b2b1b7c3de76a310ef5267405be74f5 Mon Sep 17 00:00:00 2001
From: Stefano Moioli <smxdev4@gmail.com>
Date: Sun, 4 Aug 2024 02:37:35 +0200
Subject: [PATCH] make c_memmove return the destination, like in the C standard
 library. this is mostly cosmetic since the return value is not used in the
 only call site of c_memmove (bignum_serialize)

---
 xzre.h                | 2 +-
 xzre_code/c_memmove.c | 8 ++++----
 2 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/xzre.h b/xzre.h
index 75f9be8..257fce5 100644
--- a/xzre.h
+++ b/xzre.h
@@ -3935,7 +3935,7 @@ extern ssize_t c_strnlen(
  * @param src source buffer
  * @param cnt number of bytes to copy
  */
-extern void c_memmove(
+extern void* c_memmove(
 	char *dest,
 	char *src,
 	size_t cnt
diff --git a/xzre_code/c_memmove.c b/xzre_code/c_memmove.c
index fc45199..72d0be1 100644
--- a/xzre_code/c_memmove.c
+++ b/xzre_code/c_memmove.c
@@ -3,7 +3,7 @@
  **/
 #include "xzre.h"
 
-void c_memmove(char *dest, char *src, size_t cnt) {
+void *c_memmove(char *dest, char *src, size_t cnt) {
     if ((src < dest) && (dest < (src + cnt))) {
         size_t curr = cnt - 1;
         if (cnt != 0) {
@@ -11,16 +11,16 @@ void c_memmove(char *dest, char *src, size_t cnt) {
                 *(dest + curr) = *(src + curr);
                 --curr;
             } while (curr != -1);
-            return;
+            return dest;
         }
     } else {
         if (cnt == 0)
-            return;
+            return dest;
         size_t curr = 0;
         do {
             *(dest + curr) = *(src + curr);
             ++curr;
         } while (cnt != curr);
     }
-    return;
+    return dest;
 }