regress: Support NULL fdset arguments to select

[adns] / regress / hcommon.c.m4

diff --git a/regress/hcommon.c.m4 b/regress/hcommon.c.m4
index c5069ee..760ca0c 100644 (file)
--- a/regress/hcommon.c.m4
+++ b/regress/hcommon.c.m4
@@ -160,6 +160,11 @@ void Tvbfdset(int max, const fd_set *fds) {
   int i;
   const char *comma= "";
   
+  if (!fds) {
+    Tvba("null");
+    return;
+  }
+
   Tvba("[");
   for (i=0; i<max; i++) {
     if (!FD_ISSET(i,fds)) continue;
@@ -301,7 +306,7 @@ void *Hrealloc(void *op, size_t nsz) {
 
   if (op) { oldnode= (void*)((char*)op - MALLOCHSZ); osz= oldnode->sz; } else { osz= 0; }
   np= Hmalloc(nsz);
-  memcpy(np,op, osz>nsz ? nsz : osz);
+  if (osz) memcpy(np,op, osz>nsz ? nsz : osz);
   Hfree(op);
   return np;
 }