# HG changeset patch
# User Matti Hamalainen <ccr@tnsp.org>
# Date 1583774032 -7200
# Node ID 9bbacd72df3d5346154d3029823b7ffe49a7b7d8
# Parent  a04b8fe158b986153ef0d070f0597eafc0a937ed
Allow src and dst to "overlap" for th_pstr_cpy().

diff -r a04b8fe158b9 -r 9bbacd72df3d th_string.c
--- a/th_string.c	Mon Mar 09 19:05:58 2020 +0200
+++ b/th_string.c	Mon Mar 09 19:13:52 2020 +0200
@@ -528,17 +528,19 @@
 int th_pstr_cpy(th_char_t **pdst, const th_char_t *src)
 {
     size_t slen;
+    th_char_t *tmp;
 
     if (pdst == NULL || src == NULL)
         return THERR_NULLPTR;
 
-    th_free(*pdst);
-
     slen = th_strlen(src);
-    if ((*pdst = th_malloc((slen + 1) * sizeof(th_char_t))) == NULL)
+    if ((tmp = th_malloc((slen + 1) * sizeof(th_char_t))) == NULL)
         return THERR_MALLOC;
 
-    memcpy(*pdst, src, (slen + 1) * sizeof(th_char_t));
+    memcpy(tmp, src, (slen + 1) * sizeof(th_char_t));
+
+    th_free(*pdst);
+    *pdst = tmp;
 
     return THERR_OK;
 }