------- Comment #24 from tstarling at wikimedia dot org 2010-09-10 15:25 ------- Created an attachment (id=21766) --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=21766&action=view) dynamic_cast<> hack
The attached patch uses a dynamic_cast<> hack to avoid the need to break the ABI. I added *_unlocked functions to cstdio, I'm not sure if this is necessary, but it's easy enough to remove that part if not. I also added some lightly-tested autoconf stuff. I'm an autoconf newbie so that part should probably be reviewed carefully. stdio_sync_filebuf<wchar_t>::_M_getline() is currently unreachable, since I only edited basic_istream<char>::getline() and not basic_istream<wchar_t>::getline(). It would be easy enough to fix that. I haven't used getwc_unlocked() because it's a GNU extension, POSIX only has non-wide unlocked I/O. The timings for 1M lines with 500 bytes per line, user time only, are: Old library: 26.7s New library: 1.65s fgets: 0.280s So it's better, but not perfect. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45574
