1 /*
2 * Copyright (C) 2016 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #include "androidfw/Util.h"
18
19 #include <algorithm>
20 #include <string>
21
22 #include "utils/ByteOrder.h"
23 #include "utils/Unicode.h"
24
25 #ifdef _WIN32
26 #ifdef ERROR
27 #undef ERROR
28 #endif
29 #endif
30
31 namespace android {
32 namespace util {
33
ReadUtf16StringFromDevice(const uint16_t * src,size_t len,std::string * out)34 void ReadUtf16StringFromDevice(const uint16_t* src, size_t len, std::string* out) {
35 char buf[5];
36 while (*src && len != 0) {
37 char16_t c = static_cast<char16_t>(dtohs(*src));
38 utf16_to_utf8(&c, 1, buf, sizeof(buf));
39 out->append(buf, strlen(buf));
40 ++src;
41 --len;
42 }
43 }
44
Utf8ToUtf16(const StringPiece & utf8)45 std::u16string Utf8ToUtf16(const StringPiece& utf8) {
46 ssize_t utf16_length =
47 utf8_to_utf16_length(reinterpret_cast<const uint8_t*>(utf8.data()), utf8.length());
48 if (utf16_length <= 0) {
49 return {};
50 }
51
52 std::u16string utf16;
53 utf16.resize(utf16_length);
54 utf8_to_utf16(reinterpret_cast<const uint8_t*>(utf8.data()), utf8.length(), &*utf16.begin(),
55 utf16_length + 1);
56 return utf16;
57 }
58
Utf16ToUtf8(const StringPiece16 & utf16)59 std::string Utf16ToUtf8(const StringPiece16& utf16) {
60 ssize_t utf8_length = utf16_to_utf8_length(utf16.data(), utf16.length());
61 if (utf8_length <= 0) {
62 return {};
63 }
64
65 std::string utf8;
66 utf8.resize(utf8_length);
67 utf16_to_utf8(utf16.data(), utf16.length(), &*utf8.begin(), utf8_length + 1);
68 return utf8;
69 }
70
SplitAndTransform(const StringPiece & str,char sep,const std::function<char (char)> & f)71 static std::vector<std::string> SplitAndTransform(
72 const StringPiece& str, char sep, const std::function<char(char)>& f) {
73 std::vector<std::string> parts;
74 const StringPiece::const_iterator end = std::end(str);
75 StringPiece::const_iterator start = std::begin(str);
76 StringPiece::const_iterator current;
77 do {
78 current = std::find(start, end, sep);
79 parts.emplace_back(str.substr(start, current).to_string());
80 if (f) {
81 std::string& part = parts.back();
82 std::transform(part.begin(), part.end(), part.begin(), f);
83 }
84 start = current + 1;
85 } while (current != end);
86 return parts;
87 }
88
SplitAndLowercase(const StringPiece & str,char sep)89 std::vector<std::string> SplitAndLowercase(const StringPiece& str, char sep) {
90 return SplitAndTransform(str, sep, ::tolower);
91 }
92
93
94 } // namespace util
95 } // namespace android
96