summaryrefslogtreecommitdiffstats
path: root/mtp/ffs/MtpStringBuffer.cpp
diff options
context:
space:
mode:
Diffstat (limited to '')
-rw-r--r--mtp/ffs/MtpStringBuffer.cpp108
1 files changed, 108 insertions, 0 deletions
diff --git a/mtp/ffs/MtpStringBuffer.cpp b/mtp/ffs/MtpStringBuffer.cpp
new file mode 100644
index 000000000..e2302df75
--- /dev/null
+++ b/mtp/ffs/MtpStringBuffer.cpp
@@ -0,0 +1,108 @@
+/*
+ * Copyright (C) 2010 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.
+ */
+
+#define LOG_TAG "MtpStringBuffer"
+
+#include <codecvt>
+#include <locale>
+#include <string>
+#include <vector>
+
+#include "MtpDataPacket.h"
+#include "MtpStringBuffer.h"
+
+namespace {
+
+std::wstring_convert<std::codecvt_utf8_utf16<char16_t>,char16_t> gConvert;
+
+static std::string utf16ToUtf8(std::u16string input_str) {
+ return gConvert.to_bytes(input_str);
+}
+
+static std::u16string utf8ToUtf16(std::string input_str) {
+ return gConvert.from_bytes(input_str);
+}
+
+} // namespace
+
+MtpStringBuffer::MtpStringBuffer(const char* src)
+{
+ set(src);
+}
+
+MtpStringBuffer::MtpStringBuffer(const uint16_t* src)
+{
+ set(src);
+}
+
+MtpStringBuffer::MtpStringBuffer(const MtpStringBuffer& src)
+{
+ mString = src.mString;
+}
+
+void MtpStringBuffer::set(const char* src) {
+ mString = std::string(src);
+}
+
+void MtpStringBuffer::set(const uint16_t* src) {
+ mString = utf16ToUtf8(std::u16string((const char16_t*)src));
+}
+
+bool MtpStringBuffer::readFromPacket(MtpDataPacket* packet) {
+ uint8_t count;
+ if (!packet->getUInt8(count))
+ return false;
+ if (count == 0)
+ return true;
+
+ std::vector<char16_t> buffer(count);
+ for (int i = 0; i < count; i++) {
+ uint16_t ch;
+ if (!packet->getUInt16(ch))
+ return false;
+ buffer[i] = ch;
+ }
+ if (buffer[count-1] != '\0') {
+ MTPE("Mtp string not null terminated\n");
+ return false;
+ }
+ mString = utf16ToUtf8(std::u16string(buffer.data()));
+ return true;
+}
+
+void MtpStringBuffer::writeToPacket(MtpDataPacket* packet) const {
+ std::u16string src16 = utf8ToUtf16(mString);
+ int count = src16.length();
+
+ if (count == 0) {
+ packet->putUInt8(0);
+ return;
+ }
+ packet->putUInt8(std::min(count + 1, MTP_STRING_MAX_CHARACTER_NUMBER));
+
+ int i = 0;
+ for (char16_t &c : src16) {
+ if (i == MTP_STRING_MAX_CHARACTER_NUMBER - 1) {
+ // Leave a slot for null termination.
+ MTPD("Mtp truncating long string\n");
+ break;
+ }
+ packet->putUInt16(c);
+ i++;
+ }
+ // only terminate with zero if string is not empty
+ packet->putUInt16(0);
+}