| commit | 1d67425879c3ae515e97b73df94bf2e7336178b0 | [log] [tgz] |
|---|---|---|
| author | Chris Dickens <christopher.a.dickens@gmail.com> | Thu Mar 26 21:38:45 2020 -0700 |
| committer | Chris Dickens <christopher.a.dickens@gmail.com> | Thu Mar 26 21:38:45 2020 -0700 |
| tree | 6836e21a88e894b5a65ddf09bb677499bce0c895 | |
| parent | 1201bccf857aa2c126f6f568f5255b0aa6027ac2 [diff] |
strerror: Micro-optimize implementation and remove use of strncasecmp() When comparing the user-provided locale string in libusb_setlocale(), we only care about the first two characters. The lookup strings within libusb are always lowercase, so simplify the comparison by directly comparing the result of tolower(). This removes the need for strncasecmp() which was not able to be cleanly included in the first place. Rather than storing an index into the array of localized strings, store a pointer to the selected sub-array instead. This trims the generated code of libusb_strerror() by nearly half as loads can be dropped. Also constify the arrays of strings as they should not be mutable. Signed-off-by: Chris Dickens <christopher.a.dickens@gmail.com>
libusb is a library for USB device access from Linux, macOS, Windows, OpenBSD/NetBSD, Haiku and Solaris userspace. It is written in C (Haiku backend in C++) and licensed under the GNU Lesser General Public License version 2.1 or, at your option, any later version (see COPYING).
libusb is abstracted internally in such a way that it can hopefully be ported to other operating systems. Please see the PORTING file for more information.
libusb homepage: http://libusb.info/
Developers will wish to consult the API documentation: http://api.libusb.info
Use the mailing list for questions, comments, etc: http://mailing-list.libusb.info
(Please use the mailing list rather than mailing developers directly)