de3e831eae
The UEFI variable names are in UTF-16. We add several helper functions to convert US-ASCII to UTF-16. Signed-off-by: Ying-Chun Liu (PaulLiu) <paulliu@debian.org>
74 lines
1.6 KiB
C++
74 lines
1.6 KiB
C++
/*
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* Copyright (C) 2025 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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*/
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#include "charset.h"
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size_t utf16_strlen(const char16_t *str) {
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size_t len = 0;
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for (; *str; str++) {
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len++;
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}
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return len;
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}
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int utf16_strcmp(const char16_t *s1, const char16_t *s2) {
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int ret = 0;
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for (; ; s1++, s2++) {
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ret = *s1 - *s2;
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if (ret || !*s1)
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break;
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}
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return ret;
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}
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/**
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* @brief convert utf-8 string to utf-16 string.
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*
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* This function converts utf-8 string to utf-16 string. However
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* it only supports us-ascii input right now.
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*/
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int utf8_to_utf16(char16_t *dest, const char *src, size_t size) {
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size_t i = 0;
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for (; i < size - 1 && *src; i++, src++) {
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dest[i] = *src;
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}
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dest[i] = 0;
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return 0;
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}
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/**
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* @brief convert utf-16 string to utf-8 string.
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*
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* This function converts utf-16 string to utf-8 string. However
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* it only supports us-ascii output right now.
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*/
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int utf16_to_utf8(char *dest, const char16_t *src, size_t size) {
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size_t i = 0;
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for (; i < size - 1 && *src; i++, src++) {
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dest[i] = *src;
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}
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dest[i] = 0;
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return 0;
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}
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