PR libstdc++/15002 (partial)

2004-04-19  Paolo Carlini  <pcarlini@suse.de>

	PR libstdc++/15002 (partial)
	* include/bits/basic_string.h (_M_replace_aux, _M_replace_safe):
	Special case __n2 == 1, not calling traits_type::assign/copy.

From-SVN: r80847

libstdc++-v3/ChangeLog

+2004-04-19  Paolo Carlini  <pcarlini@suse.de>
+
+	PR libstdc++/15002 (partial)
+	* include/bits/basic_string.h (_M_replace_aux, _M_replace_safe):
+	Special case __n2 == 1, not calling traits_type::assign/copy. 
+
 2004-04-17  Benjamin Kosnik  <bkoz@redhat.com>
 
 	* include/bits/stl_bvector.h: Use _M_impl._M_start.

libstdc++-v3/include/bits/basic_string.h

@@ -1342,7 +1342,9 @@ namespace std
 	if (this->max_size() - (this->size() - __n1) < __n2)
 	  __throw_length_error(__N("basic_string::_M_replace_aux"));
 	_M_mutate(__pos1, __n1, __n2);
-	if (__n2)
+	if (__n2 == 1)
+	  _M_data()[__pos1] = __c;
+	else if (__n2)
 	  traits_type::assign(_M_data() + __pos1, __n2, __c);
 	return *this;
       }
@@ -1352,7 +1354,9 @@ namespace std
 		      size_type __n2)
       {
 	_M_mutate(__pos1, __n1, __n2);
-	if (__n2)
+	if (__n2 == 1)
+	  _M_data()[__pos1] = *__s;
+	else if (__n2)
 	  traits_type::copy(_M_data() + __pos1, __s, __n2);
 	return *this;
       }