- added DynStringShorten

dynstring.c

@@ -281,6 +281,19 @@ int DynStringBackspace(pDynString self)
   return 1;
 }
 /*---------------------------------------------------------------------------*/
+int DynStringShorten(pDynString self, int length)
+{
+  assert(self);
+  assert(self->iMAGIC == DYNMAGIC);
+
+  if (length >= self->iTextLen || length < 0) {
+    return 0;
+  }
+  self->iTextLen = length;
+  self->pBuffer[length] = '\0';
+  return 1;
+}
+/*---------------------------------------------------------------------------*/
 char *Dyn2Cstring(pDynString self) {
   char *result;