mirror of
https://github.com/Atmosphere-NX/Atmosphere.git
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104 lines
2.5 KiB
C++
104 lines
2.5 KiB
C++
/*
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* Copyright (c) 2018-2020 Atmosphère-NX
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#pragma once
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#include <vapours/common.hpp>
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#include <vapours/assert.hpp>
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namespace ams::util {
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template<typename T>
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constexpr T ToLower(T c) {
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return ('A' <= c && c <= 'Z') ? (c - 'A' + 'a') : c;
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}
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template<typename T>
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constexpr T ToUpper(T c) {
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return ('a' <= c && c <= 'z') ? (c - 'a' + 'A') : c;
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}
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template<typename T>
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constexpr int Strncmp(const T *lhs, const T *rhs, int count) {
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AMS_ASSERT(lhs != nullptr);
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AMS_ASSERT(rhs != nullptr);
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AMS_ABORT_UNLESS(count >= 0);
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if (count == 0) {
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return 0;
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}
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T l, r;
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do {
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l = *(lhs++);
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r = *(rhs++);
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} while (l && (l == r) && (--count));
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return l - r;
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}
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template<typename T>
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constexpr int Strnicmp(const T *lhs, const T *rhs, int count) {
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AMS_ASSERT(lhs != nullptr);
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AMS_ASSERT(rhs != nullptr);
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AMS_ABORT_UNLESS(count >= 0);
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if (count == 0) {
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return 0;
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}
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T l, r;
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do {
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l = ::ams::util::ToLower(*(lhs++));
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r = ::ams::util::ToLower(*(rhs++));
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} while (l && (l == r) && (--count));
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return l - r;
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}
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template<typename T>
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constexpr int Strlcpy(T *dst, const T *src, int count) {
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AMS_ASSERT(dst != nullptr);
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AMS_ASSERT(src != nullptr);
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const T *cur = src;
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if (count > 0) {
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while ((--count) && *cur) {
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*(dst++) = *(cur++);
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}
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*dst = 0;
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}
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while (*cur) {
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cur++;
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}
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return static_cast<int>(cur - src);
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}
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template<typename T>
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constexpr int Strnlen(const T *str, int count) {
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AMS_ASSERT(str != nullptr);
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AMS_ASSERT(count >= 0);
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int length = 0;
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while (count-- && *str++) {
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++length;
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}
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return length;
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}
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}
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