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sso_string_base.h (__sso_string_base<>::_M_swap): Change the various traits_type::copy call to always copy the entire local buffer...

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2005-11-03  Paolo Carlini  <pcarlini@suse.de>

	* include/ext/sso_string_base.h (__sso_string_base<>::_M_swap):
	Change the various traits_type::copy call to always copy the
	entire local buffer; return early and don't do a full swap on
	the lengths for two common cases; change two _S_copy to plain
	traits_type::copy.

From-SVN: r106431
This commit is contained in:
Paolo Carlini 2005-11-03 13:13:21 +00:00 • committed by Paolo Carlini
parent 02f1d17ccc
commit f9c4ee6d10
2 changed files with 23 additions and 10 deletions
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8
libstdc++-v3/ChangeLog
View file

@ -1,3 +1,11 @@
2005-11-03 Paolo Carlini <pcarlini@suse.de>
* include/ext/sso_string_base.h (__sso_string_base<>::_M_swap):
Change the various traits_type::copy call to always copy the
entire local buffer; return early and don't do a full swap on
the lengths for two common cases; change two _S_copy to plain
traits_type::copy.
2005-11-02 Thomas Kho <tkho@ucla.edu>
PR libstdc++/23425

25
libstdc++-v3/include/ext/sso_string_base.h
View file

@ -255,29 +255,34 @@ namespace __gnu_cxx
{
_CharT __tmp_data[_S_local_capacity + 1];
traits_type::copy(__tmp_data, __rcs._M_local_data,
__rcs._M_length() + 1);
_S_local_capacity + 1);
traits_type::copy(__rcs._M_local_data, _M_local_data,
_M_length() + 1);
_S_local_capacity + 1);
traits_type::copy(_M_local_data, __tmp_data,
__rcs._M_length() + 1);
_S_local_capacity + 1);
}
else if (__rcs._M_length())
{
traits_type::copy(_M_local_data, __rcs._M_local_data,
__rcs._M_length() + 1);
traits_type::assign(__rcs._M_local_data[0], _CharT());
_S_local_capacity + 1);
_M_length(__rcs._M_length());
__rcs._M_set_length(0);
return;
}
else if (_M_length())
{
traits_type::copy(__rcs._M_local_data, _M_local_data,
_M_length() + 1);
traits_type::assign(_M_local_data[0], _CharT());
_S_local_capacity + 1);
__rcs._M_length(_M_length());
_M_set_length(0);
return;
}
}
else
{
const size_type __tmp_capacity = __rcs._M_allocated_capacity;
_S_copy(__rcs._M_local_data, _M_local_data, _M_length() + 1);
traits_type::copy(__rcs._M_local_data, _M_local_data,
_S_local_capacity + 1);
_M_data(__rcs._M_data());
__rcs._M_data(__rcs._M_local_data);
_M_capacity(__tmp_capacity);
@ -287,8 +292,8 @@ namespace __gnu_cxx
const size_type __tmp_capacity = _M_allocated_capacity;
if (__rcs._M_is_local())
{
_S_copy(_M_local_data, __rcs._M_local_data,
__rcs._M_length() + 1);
traits_type::copy(_M_local_data, __rcs._M_local_data,
_S_local_capacity + 1);
__rcs._M_data(_M_data());
_M_data(_M_local_data);
}