diff options
Diffstat (limited to 'include/dux/cstr.d/cstrcmp.hh')
| -rw-r--r-- | include/dux/cstr.d/cstrcmp.hh | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/include/dux/cstr.d/cstrcmp.hh b/include/dux/cstr.d/cstrcmp.hh new file mode 100644 index 0000000..ad262dc --- /dev/null +++ b/include/dux/cstr.d/cstrcmp.hh @@ -0,0 +1,35 @@ +/* + Copyright 2021 Gabriel Jensen + + This file is part of dux. + + dux is free software: you can redistribute it and/or modify it under the + terms of the GNU Affero General Public License as published by the Free + Software Foundation, either version 3 of the License, or (at your + option) any later version. + + dux is distributed in the hope that it will be useful, but WITHOUT ANY + WARRANTY; without even the implied warranty of MERCHANTABILITY or + FITNESS FOR A PARTICULAR PURPOSE. See the GNU Affero General Public + License for more details. + + You should have received a copy of the GNU Affero General Public License + along with dux. If not, see <https://www.gnu.org/licenses/>. +*/ + +constexpr auto ::dux::cstrcmp(char const * const dux_restr _lstr,char const * const dux_restr _rstr) noexcept -> ::dux::sbyte { + auto const maxn = ::dux::min(::dux::cstrlen(_lstr),::dux::cstrlen(_rstr)); + for (auto n = 0x0uz;n <= maxn;n += 0x1uz) { + auto const lchr = _lstr[n]; + auto const rchr = _rstr[n]; + if (lchr != rchr) [[unlikely]] { + if (lchr > rchr) { + return ::dux::sbytev(-0x1); + } + if (lchr < rchr) { + return ::dux::sbytev(0x1); + } + } + } + return ::dux::sbytev(0x0); +} |