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/*
* Copyright (C) 2016 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "androidfw/Util.h"
#include <algorithm>
#include <string>
#include "utils/ByteOrder.h"
#include "utils/Unicode.h"
#ifdef _WIN32
#ifdef ERROR
#undef ERROR
#endif
#endif
namespace android {
namespace util {
void ReadUtf16StringFromDevice(const uint16_t* src, size_t len, std::string* out) {
char buf[5];
while (*src && len != 0) {
char16_t c = static_cast<char16_t>(dtohs(*src));
utf16_to_utf8(&c, 1, buf, sizeof(buf));
out->append(buf, strlen(buf));
++src;
--len;
}
}
std::u16string Utf8ToUtf16(const StringPiece& utf8) {
ssize_t utf16_length =
utf8_to_utf16_length(reinterpret_cast<const uint8_t*>(utf8.data()), utf8.length());
if (utf16_length <= 0) {
return {};
}
std::u16string utf16;
utf16.resize(utf16_length);
utf8_to_utf16(reinterpret_cast<const uint8_t*>(utf8.data()), utf8.length(), &*utf16.begin(),
utf16_length + 1);
return utf16;
}
std::string Utf16ToUtf8(const StringPiece16& utf16) {
ssize_t utf8_length = utf16_to_utf8_length(utf16.data(), utf16.length());
if (utf8_length <= 0) {
return {};
}
std::string utf8;
utf8.resize(utf8_length);
utf16_to_utf8(utf16.data(), utf16.length(), &*utf8.begin(), utf8_length + 1);
return utf8;
}
static std::vector<std::string> SplitAndTransform(
const StringPiece& str, char sep, const std::function<char(char)>& f) {
std::vector<std::string> parts;
const StringPiece::const_iterator end = std::end(str);
StringPiece::const_iterator start = std::begin(str);
StringPiece::const_iterator current;
do {
current = std::find(start, end, sep);
parts.emplace_back(str.substr(start, current).to_string());
if (f) {
std::string& part = parts.back();
std::transform(part.begin(), part.end(), part.begin(), f);
}
start = current + 1;
} while (current != end);
return parts;
}
std::vector<std::string> SplitAndLowercase(const StringPiece& str, char sep) {
return SplitAndTransform(str, sep, ::tolower);
}
} // namespace util
} // namespace android
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