henrike@webrtc.org | f048872 | 2014-05-13 18:00:26 +0000 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2004 The WebRTC Project Authors. All rights reserved. |
| 3 | * |
| 4 | * Use of this source code is governed by a BSD-style license |
| 5 | * that can be found in the LICENSE file in the root of the source |
| 6 | * tree. An additional intellectual property rights grant can be found |
| 7 | * in the file PATENTS. All contributing project authors may |
| 8 | * be found in the AUTHORS file in the root of the source tree. |
| 9 | */ |
| 10 | |
| 11 | #if defined(WEBRTC_POSIX) |
| 12 | #include <sys/file.h> |
| 13 | #endif // WEBRTC_POSIX |
| 14 | #include <sys/types.h> |
| 15 | #include <sys/stat.h> |
| 16 | #include <errno.h> |
andresp@webrtc.org | ff689be | 2015-02-12 11:54:26 +0000 | [diff] [blame] | 17 | |
| 18 | #include <algorithm> |
henrike@webrtc.org | f048872 | 2014-05-13 18:00:26 +0000 | [diff] [blame] | 19 | #include <string> |
andresp@webrtc.org | ff689be | 2015-02-12 11:54:26 +0000 | [diff] [blame] | 20 | |
Mirko Bonadei | 92ea95e | 2017-09-15 06:47:31 +0200 | [diff] [blame] | 21 | #include "rtc_base/basictypes.h" |
| 22 | #include "rtc_base/checks.h" |
| 23 | #include "rtc_base/logging.h" |
| 24 | #include "rtc_base/messagequeue.h" |
| 25 | #include "rtc_base/stream.h" |
| 26 | #include "rtc_base/stringencode.h" |
| 27 | #include "rtc_base/stringutils.h" |
| 28 | #include "rtc_base/thread.h" |
| 29 | #include "rtc_base/timeutils.h" |
henrike@webrtc.org | f048872 | 2014-05-13 18:00:26 +0000 | [diff] [blame] | 30 | |
| 31 | #if defined(WEBRTC_WIN) |
Mirko Bonadei | 92ea95e | 2017-09-15 06:47:31 +0200 | [diff] [blame] | 32 | #include "rtc_base/win32.h" |
henrike@webrtc.org | f048872 | 2014-05-13 18:00:26 +0000 | [diff] [blame] | 33 | #define fileno _fileno |
| 34 | #endif |
| 35 | |
| 36 | namespace rtc { |
| 37 | |
| 38 | /////////////////////////////////////////////////////////////////////////////// |
| 39 | // StreamInterface |
| 40 | /////////////////////////////////////////////////////////////////////////////// |
| 41 | StreamInterface::~StreamInterface() { |
| 42 | } |
| 43 | |
| 44 | StreamResult StreamInterface::WriteAll(const void* data, size_t data_len, |
| 45 | size_t* written, int* error) { |
| 46 | StreamResult result = SR_SUCCESS; |
| 47 | size_t total_written = 0, current_written; |
| 48 | while (total_written < data_len) { |
| 49 | result = Write(static_cast<const char*>(data) + total_written, |
| 50 | data_len - total_written, ¤t_written, error); |
| 51 | if (result != SR_SUCCESS) |
| 52 | break; |
| 53 | total_written += current_written; |
| 54 | } |
| 55 | if (written) |
| 56 | *written = total_written; |
| 57 | return result; |
| 58 | } |
| 59 | |
| 60 | StreamResult StreamInterface::ReadAll(void* buffer, size_t buffer_len, |
| 61 | size_t* read, int* error) { |
| 62 | StreamResult result = SR_SUCCESS; |
| 63 | size_t total_read = 0, current_read; |
| 64 | while (total_read < buffer_len) { |
| 65 | result = Read(static_cast<char*>(buffer) + total_read, |
| 66 | buffer_len - total_read, ¤t_read, error); |
| 67 | if (result != SR_SUCCESS) |
| 68 | break; |
| 69 | total_read += current_read; |
| 70 | } |
| 71 | if (read) |
| 72 | *read = total_read; |
| 73 | return result; |
| 74 | } |
| 75 | |
| 76 | StreamResult StreamInterface::ReadLine(std::string* line) { |
| 77 | line->clear(); |
| 78 | StreamResult result = SR_SUCCESS; |
| 79 | while (true) { |
| 80 | char ch; |
deadbeef | 37f5ecf | 2017-02-27 14:06:41 -0800 | [diff] [blame] | 81 | result = Read(&ch, sizeof(ch), nullptr, nullptr); |
henrike@webrtc.org | f048872 | 2014-05-13 18:00:26 +0000 | [diff] [blame] | 82 | if (result != SR_SUCCESS) { |
| 83 | break; |
| 84 | } |
| 85 | if (ch == '\n') { |
| 86 | break; |
| 87 | } |
| 88 | line->push_back(ch); |
| 89 | } |
| 90 | if (!line->empty()) { // give back the line we've collected so far with |
| 91 | result = SR_SUCCESS; // a success code. Otherwise return the last code |
| 92 | } |
| 93 | return result; |
| 94 | } |
| 95 | |
| 96 | void StreamInterface::PostEvent(Thread* t, int events, int err) { |
Taylor Brandstetter | 5d97a9a | 2016-06-10 14:17:27 -0700 | [diff] [blame] | 97 | t->Post(RTC_FROM_HERE, this, MSG_POST_EVENT, |
| 98 | new StreamEventData(events, err)); |
henrike@webrtc.org | f048872 | 2014-05-13 18:00:26 +0000 | [diff] [blame] | 99 | } |
| 100 | |
| 101 | void StreamInterface::PostEvent(int events, int err) { |
| 102 | PostEvent(Thread::Current(), events, err); |
| 103 | } |
| 104 | |
kwiberg@webrtc.org | 67186fe | 2015-03-09 22:21:53 +0000 | [diff] [blame] | 105 | const void* StreamInterface::GetReadData(size_t* data_len) { |
deadbeef | 37f5ecf | 2017-02-27 14:06:41 -0800 | [diff] [blame] | 106 | return nullptr; |
kwiberg@webrtc.org | 67186fe | 2015-03-09 22:21:53 +0000 | [diff] [blame] | 107 | } |
| 108 | |
| 109 | void* StreamInterface::GetWriteBuffer(size_t* buf_len) { |
deadbeef | 37f5ecf | 2017-02-27 14:06:41 -0800 | [diff] [blame] | 110 | return nullptr; |
kwiberg@webrtc.org | 67186fe | 2015-03-09 22:21:53 +0000 | [diff] [blame] | 111 | } |
| 112 | |
| 113 | bool StreamInterface::SetPosition(size_t position) { |
| 114 | return false; |
| 115 | } |
| 116 | |
| 117 | bool StreamInterface::GetPosition(size_t* position) const { |
| 118 | return false; |
| 119 | } |
| 120 | |
| 121 | bool StreamInterface::GetSize(size_t* size) const { |
| 122 | return false; |
| 123 | } |
| 124 | |
| 125 | bool StreamInterface::GetAvailable(size_t* size) const { |
| 126 | return false; |
| 127 | } |
| 128 | |
| 129 | bool StreamInterface::GetWriteRemaining(size_t* size) const { |
| 130 | return false; |
| 131 | } |
| 132 | |
| 133 | bool StreamInterface::Flush() { |
| 134 | return false; |
| 135 | } |
| 136 | |
| 137 | bool StreamInterface::ReserveSize(size_t size) { |
| 138 | return true; |
| 139 | } |
| 140 | |
henrike@webrtc.org | f048872 | 2014-05-13 18:00:26 +0000 | [diff] [blame] | 141 | StreamInterface::StreamInterface() { |
| 142 | } |
| 143 | |
| 144 | void StreamInterface::OnMessage(Message* msg) { |
| 145 | if (MSG_POST_EVENT == msg->message_id) { |
| 146 | StreamEventData* pe = static_cast<StreamEventData*>(msg->pdata); |
| 147 | SignalEvent(this, pe->events, pe->error); |
| 148 | delete msg->pdata; |
| 149 | } |
| 150 | } |
| 151 | |
| 152 | /////////////////////////////////////////////////////////////////////////////// |
| 153 | // StreamAdapterInterface |
| 154 | /////////////////////////////////////////////////////////////////////////////// |
| 155 | |
| 156 | StreamAdapterInterface::StreamAdapterInterface(StreamInterface* stream, |
| 157 | bool owned) |
| 158 | : stream_(stream), owned_(owned) { |
deadbeef | 37f5ecf | 2017-02-27 14:06:41 -0800 | [diff] [blame] | 159 | if (nullptr != stream_) |
henrike@webrtc.org | f048872 | 2014-05-13 18:00:26 +0000 | [diff] [blame] | 160 | stream_->SignalEvent.connect(this, &StreamAdapterInterface::OnEvent); |
| 161 | } |
| 162 | |
kwiberg@webrtc.org | 67186fe | 2015-03-09 22:21:53 +0000 | [diff] [blame] | 163 | StreamState StreamAdapterInterface::GetState() const { |
| 164 | return stream_->GetState(); |
| 165 | } |
| 166 | StreamResult StreamAdapterInterface::Read(void* buffer, |
| 167 | size_t buffer_len, |
| 168 | size_t* read, |
| 169 | int* error) { |
| 170 | return stream_->Read(buffer, buffer_len, read, error); |
| 171 | } |
| 172 | StreamResult StreamAdapterInterface::Write(const void* data, |
| 173 | size_t data_len, |
| 174 | size_t* written, |
| 175 | int* error) { |
| 176 | return stream_->Write(data, data_len, written, error); |
| 177 | } |
| 178 | void StreamAdapterInterface::Close() { |
| 179 | stream_->Close(); |
| 180 | } |
| 181 | |
| 182 | bool StreamAdapterInterface::SetPosition(size_t position) { |
| 183 | return stream_->SetPosition(position); |
| 184 | } |
| 185 | |
| 186 | bool StreamAdapterInterface::GetPosition(size_t* position) const { |
| 187 | return stream_->GetPosition(position); |
| 188 | } |
| 189 | |
| 190 | bool StreamAdapterInterface::GetSize(size_t* size) const { |
| 191 | return stream_->GetSize(size); |
| 192 | } |
| 193 | |
| 194 | bool StreamAdapterInterface::GetAvailable(size_t* size) const { |
| 195 | return stream_->GetAvailable(size); |
| 196 | } |
| 197 | |
| 198 | bool StreamAdapterInterface::GetWriteRemaining(size_t* size) const { |
| 199 | return stream_->GetWriteRemaining(size); |
| 200 | } |
| 201 | |
| 202 | bool StreamAdapterInterface::ReserveSize(size_t size) { |
| 203 | return stream_->ReserveSize(size); |
| 204 | } |
| 205 | |
| 206 | bool StreamAdapterInterface::Flush() { |
| 207 | return stream_->Flush(); |
| 208 | } |
| 209 | |
henrike@webrtc.org | f048872 | 2014-05-13 18:00:26 +0000 | [diff] [blame] | 210 | void StreamAdapterInterface::Attach(StreamInterface* stream, bool owned) { |
deadbeef | 37f5ecf | 2017-02-27 14:06:41 -0800 | [diff] [blame] | 211 | if (nullptr != stream_) |
henrike@webrtc.org | f048872 | 2014-05-13 18:00:26 +0000 | [diff] [blame] | 212 | stream_->SignalEvent.disconnect(this); |
| 213 | if (owned_) |
| 214 | delete stream_; |
| 215 | stream_ = stream; |
| 216 | owned_ = owned; |
deadbeef | 37f5ecf | 2017-02-27 14:06:41 -0800 | [diff] [blame] | 217 | if (nullptr != stream_) |
henrike@webrtc.org | f048872 | 2014-05-13 18:00:26 +0000 | [diff] [blame] | 218 | stream_->SignalEvent.connect(this, &StreamAdapterInterface::OnEvent); |
| 219 | } |
| 220 | |
| 221 | StreamInterface* StreamAdapterInterface::Detach() { |
deadbeef | 37f5ecf | 2017-02-27 14:06:41 -0800 | [diff] [blame] | 222 | if (nullptr != stream_) |
henrike@webrtc.org | f048872 | 2014-05-13 18:00:26 +0000 | [diff] [blame] | 223 | stream_->SignalEvent.disconnect(this); |
| 224 | StreamInterface* stream = stream_; |
deadbeef | 37f5ecf | 2017-02-27 14:06:41 -0800 | [diff] [blame] | 225 | stream_ = nullptr; |
henrike@webrtc.org | f048872 | 2014-05-13 18:00:26 +0000 | [diff] [blame] | 226 | return stream; |
| 227 | } |
| 228 | |
| 229 | StreamAdapterInterface::~StreamAdapterInterface() { |
| 230 | if (owned_) |
| 231 | delete stream_; |
| 232 | } |
| 233 | |
kwiberg@webrtc.org | 67186fe | 2015-03-09 22:21:53 +0000 | [diff] [blame] | 234 | void StreamAdapterInterface::OnEvent(StreamInterface* stream, |
| 235 | int events, |
| 236 | int err) { |
| 237 | SignalEvent(this, events, err); |
| 238 | } |
| 239 | |
henrike@webrtc.org | f048872 | 2014-05-13 18:00:26 +0000 | [diff] [blame] | 240 | /////////////////////////////////////////////////////////////////////////////// |
deadbeef | f137e97 | 2017-03-23 15:45:49 -0700 | [diff] [blame] | 241 | // StreamTap |
| 242 | /////////////////////////////////////////////////////////////////////////////// |
| 243 | |
| 244 | StreamTap::StreamTap(StreamInterface* stream, StreamInterface* tap) |
| 245 | : StreamAdapterInterface(stream), tap_(), tap_result_(SR_SUCCESS), |
| 246 | tap_error_(0) { |
| 247 | AttachTap(tap); |
| 248 | } |
| 249 | |
| 250 | StreamTap::~StreamTap() = default; |
| 251 | |
| 252 | void StreamTap::AttachTap(StreamInterface* tap) { |
| 253 | tap_.reset(tap); |
| 254 | } |
| 255 | |
| 256 | StreamInterface* StreamTap::DetachTap() { |
| 257 | return tap_.release(); |
| 258 | } |
| 259 | |
| 260 | StreamResult StreamTap::GetTapResult(int* error) { |
| 261 | if (error) { |
| 262 | *error = tap_error_; |
| 263 | } |
| 264 | return tap_result_; |
| 265 | } |
| 266 | |
| 267 | StreamResult StreamTap::Read(void* buffer, size_t buffer_len, |
| 268 | size_t* read, int* error) { |
| 269 | size_t backup_read; |
| 270 | if (!read) { |
| 271 | read = &backup_read; |
| 272 | } |
| 273 | StreamResult res = StreamAdapterInterface::Read(buffer, buffer_len, |
| 274 | read, error); |
| 275 | if ((res == SR_SUCCESS) && (tap_result_ == SR_SUCCESS)) { |
| 276 | tap_result_ = tap_->WriteAll(buffer, *read, nullptr, &tap_error_); |
| 277 | } |
| 278 | return res; |
| 279 | } |
| 280 | |
| 281 | StreamResult StreamTap::Write(const void* data, size_t data_len, |
| 282 | size_t* written, int* error) { |
| 283 | size_t backup_written; |
| 284 | if (!written) { |
| 285 | written = &backup_written; |
| 286 | } |
| 287 | StreamResult res = StreamAdapterInterface::Write(data, data_len, |
| 288 | written, error); |
| 289 | if ((res == SR_SUCCESS) && (tap_result_ == SR_SUCCESS)) { |
| 290 | tap_result_ = tap_->WriteAll(data, *written, nullptr, &tap_error_); |
| 291 | } |
| 292 | return res; |
| 293 | } |
| 294 | |
| 295 | /////////////////////////////////////////////////////////////////////////////// |
henrike@webrtc.org | f048872 | 2014-05-13 18:00:26 +0000 | [diff] [blame] | 296 | // NullStream |
| 297 | /////////////////////////////////////////////////////////////////////////////// |
| 298 | |
| 299 | NullStream::NullStream() { |
| 300 | } |
| 301 | |
| 302 | NullStream::~NullStream() { |
| 303 | } |
| 304 | |
| 305 | StreamState NullStream::GetState() const { |
| 306 | return SS_OPEN; |
| 307 | } |
| 308 | |
| 309 | StreamResult NullStream::Read(void* buffer, size_t buffer_len, |
| 310 | size_t* read, int* error) { |
| 311 | if (error) *error = -1; |
| 312 | return SR_ERROR; |
| 313 | } |
| 314 | |
| 315 | StreamResult NullStream::Write(const void* data, size_t data_len, |
| 316 | size_t* written, int* error) { |
| 317 | if (written) *written = data_len; |
| 318 | return SR_SUCCESS; |
| 319 | } |
| 320 | |
| 321 | void NullStream::Close() { |
| 322 | } |
| 323 | |
| 324 | /////////////////////////////////////////////////////////////////////////////// |
| 325 | // FileStream |
| 326 | /////////////////////////////////////////////////////////////////////////////// |
| 327 | |
deadbeef | 37f5ecf | 2017-02-27 14:06:41 -0800 | [diff] [blame] | 328 | FileStream::FileStream() : file_(nullptr) {} |
henrike@webrtc.org | f048872 | 2014-05-13 18:00:26 +0000 | [diff] [blame] | 329 | |
| 330 | FileStream::~FileStream() { |
| 331 | FileStream::Close(); |
| 332 | } |
| 333 | |
| 334 | bool FileStream::Open(const std::string& filename, const char* mode, |
| 335 | int* error) { |
| 336 | Close(); |
| 337 | #if defined(WEBRTC_WIN) |
| 338 | std::wstring wfilename; |
| 339 | if (Utf8ToWindowsFilename(filename, &wfilename)) { |
| 340 | file_ = _wfopen(wfilename.c_str(), ToUtf16(mode).c_str()); |
| 341 | } else { |
| 342 | if (error) { |
| 343 | *error = -1; |
| 344 | return false; |
| 345 | } |
| 346 | } |
| 347 | #else |
| 348 | file_ = fopen(filename.c_str(), mode); |
| 349 | #endif |
| 350 | if (!file_ && error) { |
| 351 | *error = errno; |
| 352 | } |
deadbeef | 37f5ecf | 2017-02-27 14:06:41 -0800 | [diff] [blame] | 353 | return (file_ != nullptr); |
henrike@webrtc.org | f048872 | 2014-05-13 18:00:26 +0000 | [diff] [blame] | 354 | } |
| 355 | |
| 356 | bool FileStream::OpenShare(const std::string& filename, const char* mode, |
| 357 | int shflag, int* error) { |
| 358 | Close(); |
| 359 | #if defined(WEBRTC_WIN) |
| 360 | std::wstring wfilename; |
| 361 | if (Utf8ToWindowsFilename(filename, &wfilename)) { |
| 362 | file_ = _wfsopen(wfilename.c_str(), ToUtf16(mode).c_str(), shflag); |
| 363 | if (!file_ && error) { |
| 364 | *error = errno; |
| 365 | return false; |
| 366 | } |
deadbeef | 37f5ecf | 2017-02-27 14:06:41 -0800 | [diff] [blame] | 367 | return file_ != nullptr; |
henrike@webrtc.org | f048872 | 2014-05-13 18:00:26 +0000 | [diff] [blame] | 368 | } else { |
| 369 | if (error) { |
| 370 | *error = -1; |
| 371 | } |
| 372 | return false; |
| 373 | } |
| 374 | #else |
| 375 | return Open(filename, mode, error); |
| 376 | #endif |
| 377 | } |
| 378 | |
| 379 | bool FileStream::DisableBuffering() { |
| 380 | if (!file_) |
| 381 | return false; |
deadbeef | 37f5ecf | 2017-02-27 14:06:41 -0800 | [diff] [blame] | 382 | return (setvbuf(file_, nullptr, _IONBF, 0) == 0); |
henrike@webrtc.org | f048872 | 2014-05-13 18:00:26 +0000 | [diff] [blame] | 383 | } |
| 384 | |
| 385 | StreamState FileStream::GetState() const { |
deadbeef | 37f5ecf | 2017-02-27 14:06:41 -0800 | [diff] [blame] | 386 | return (file_ == nullptr) ? SS_CLOSED : SS_OPEN; |
henrike@webrtc.org | f048872 | 2014-05-13 18:00:26 +0000 | [diff] [blame] | 387 | } |
| 388 | |
| 389 | StreamResult FileStream::Read(void* buffer, size_t buffer_len, |
| 390 | size_t* read, int* error) { |
| 391 | if (!file_) |
| 392 | return SR_EOS; |
| 393 | size_t result = fread(buffer, 1, buffer_len, file_); |
| 394 | if ((result == 0) && (buffer_len > 0)) { |
| 395 | if (feof(file_)) |
| 396 | return SR_EOS; |
| 397 | if (error) |
| 398 | *error = errno; |
| 399 | return SR_ERROR; |
| 400 | } |
| 401 | if (read) |
| 402 | *read = result; |
| 403 | return SR_SUCCESS; |
| 404 | } |
| 405 | |
| 406 | StreamResult FileStream::Write(const void* data, size_t data_len, |
| 407 | size_t* written, int* error) { |
| 408 | if (!file_) |
| 409 | return SR_EOS; |
| 410 | size_t result = fwrite(data, 1, data_len, file_); |
| 411 | if ((result == 0) && (data_len > 0)) { |
| 412 | if (error) |
| 413 | *error = errno; |
| 414 | return SR_ERROR; |
| 415 | } |
| 416 | if (written) |
| 417 | *written = result; |
| 418 | return SR_SUCCESS; |
| 419 | } |
| 420 | |
| 421 | void FileStream::Close() { |
| 422 | if (file_) { |
| 423 | DoClose(); |
deadbeef | 37f5ecf | 2017-02-27 14:06:41 -0800 | [diff] [blame] | 424 | file_ = nullptr; |
henrike@webrtc.org | f048872 | 2014-05-13 18:00:26 +0000 | [diff] [blame] | 425 | } |
| 426 | } |
| 427 | |
| 428 | bool FileStream::SetPosition(size_t position) { |
| 429 | if (!file_) |
| 430 | return false; |
| 431 | return (fseek(file_, static_cast<int>(position), SEEK_SET) == 0); |
| 432 | } |
| 433 | |
| 434 | bool FileStream::GetPosition(size_t* position) const { |
deadbeef | 37f5ecf | 2017-02-27 14:06:41 -0800 | [diff] [blame] | 435 | RTC_DCHECK(nullptr != position); |
henrike@webrtc.org | f048872 | 2014-05-13 18:00:26 +0000 | [diff] [blame] | 436 | if (!file_) |
| 437 | return false; |
| 438 | long result = ftell(file_); |
| 439 | if (result < 0) |
| 440 | return false; |
| 441 | if (position) |
| 442 | *position = result; |
| 443 | return true; |
| 444 | } |
| 445 | |
| 446 | bool FileStream::GetSize(size_t* size) const { |
deadbeef | 37f5ecf | 2017-02-27 14:06:41 -0800 | [diff] [blame] | 447 | RTC_DCHECK(nullptr != size); |
henrike@webrtc.org | f048872 | 2014-05-13 18:00:26 +0000 | [diff] [blame] | 448 | if (!file_) |
| 449 | return false; |
| 450 | struct stat file_stats; |
| 451 | if (fstat(fileno(file_), &file_stats) != 0) |
| 452 | return false; |
| 453 | if (size) |
| 454 | *size = file_stats.st_size; |
| 455 | return true; |
| 456 | } |
| 457 | |
| 458 | bool FileStream::GetAvailable(size_t* size) const { |
deadbeef | 37f5ecf | 2017-02-27 14:06:41 -0800 | [diff] [blame] | 459 | RTC_DCHECK(nullptr != size); |
henrike@webrtc.org | f048872 | 2014-05-13 18:00:26 +0000 | [diff] [blame] | 460 | if (!GetSize(size)) |
| 461 | return false; |
| 462 | long result = ftell(file_); |
| 463 | if (result < 0) |
| 464 | return false; |
| 465 | if (size) |
| 466 | *size -= result; |
| 467 | return true; |
| 468 | } |
| 469 | |
| 470 | bool FileStream::ReserveSize(size_t size) { |
| 471 | // TODO: extend the file to the proper length |
| 472 | return true; |
| 473 | } |
| 474 | |
henrike@webrtc.org | f048872 | 2014-05-13 18:00:26 +0000 | [diff] [blame] | 475 | bool FileStream::Flush() { |
| 476 | if (file_) { |
| 477 | return (0 == fflush(file_)); |
| 478 | } |
| 479 | // try to flush empty file? |
nisse | c80e741 | 2017-01-11 05:56:46 -0800 | [diff] [blame] | 480 | RTC_NOTREACHED(); |
henrike@webrtc.org | f048872 | 2014-05-13 18:00:26 +0000 | [diff] [blame] | 481 | return false; |
| 482 | } |
| 483 | |
| 484 | #if defined(WEBRTC_POSIX) && !defined(__native_client__) |
| 485 | |
| 486 | bool FileStream::TryLock() { |
deadbeef | 37f5ecf | 2017-02-27 14:06:41 -0800 | [diff] [blame] | 487 | if (file_ == nullptr) { |
henrike@webrtc.org | f048872 | 2014-05-13 18:00:26 +0000 | [diff] [blame] | 488 | // Stream not open. |
nisse | c80e741 | 2017-01-11 05:56:46 -0800 | [diff] [blame] | 489 | RTC_NOTREACHED(); |
henrike@webrtc.org | f048872 | 2014-05-13 18:00:26 +0000 | [diff] [blame] | 490 | return false; |
| 491 | } |
| 492 | |
| 493 | return flock(fileno(file_), LOCK_EX|LOCK_NB) == 0; |
| 494 | } |
| 495 | |
| 496 | bool FileStream::Unlock() { |
deadbeef | 37f5ecf | 2017-02-27 14:06:41 -0800 | [diff] [blame] | 497 | if (file_ == nullptr) { |
henrike@webrtc.org | f048872 | 2014-05-13 18:00:26 +0000 | [diff] [blame] | 498 | // Stream not open. |
nisse | c80e741 | 2017-01-11 05:56:46 -0800 | [diff] [blame] | 499 | RTC_NOTREACHED(); |
henrike@webrtc.org | f048872 | 2014-05-13 18:00:26 +0000 | [diff] [blame] | 500 | return false; |
| 501 | } |
| 502 | |
| 503 | return flock(fileno(file_), LOCK_UN) == 0; |
| 504 | } |
| 505 | |
| 506 | #endif |
| 507 | |
| 508 | void FileStream::DoClose() { |
| 509 | fclose(file_); |
| 510 | } |
| 511 | |
henrike@webrtc.org | f048872 | 2014-05-13 18:00:26 +0000 | [diff] [blame] | 512 | /////////////////////////////////////////////////////////////////////////////// |
| 513 | // MemoryStream |
| 514 | /////////////////////////////////////////////////////////////////////////////// |
| 515 | |
| 516 | MemoryStreamBase::MemoryStreamBase() |
deadbeef | 37f5ecf | 2017-02-27 14:06:41 -0800 | [diff] [blame] | 517 | : buffer_(nullptr), buffer_length_(0), data_length_(0), seek_position_(0) {} |
henrike@webrtc.org | f048872 | 2014-05-13 18:00:26 +0000 | [diff] [blame] | 518 | |
| 519 | StreamState MemoryStreamBase::GetState() const { |
| 520 | return SS_OPEN; |
| 521 | } |
| 522 | |
| 523 | StreamResult MemoryStreamBase::Read(void* buffer, size_t bytes, |
| 524 | size_t* bytes_read, int* error) { |
| 525 | if (seek_position_ >= data_length_) { |
| 526 | return SR_EOS; |
| 527 | } |
| 528 | size_t available = data_length_ - seek_position_; |
| 529 | if (bytes > available) { |
| 530 | // Read partial buffer |
| 531 | bytes = available; |
| 532 | } |
| 533 | memcpy(buffer, &buffer_[seek_position_], bytes); |
| 534 | seek_position_ += bytes; |
| 535 | if (bytes_read) { |
| 536 | *bytes_read = bytes; |
| 537 | } |
| 538 | return SR_SUCCESS; |
| 539 | } |
| 540 | |
| 541 | StreamResult MemoryStreamBase::Write(const void* buffer, size_t bytes, |
| 542 | size_t* bytes_written, int* error) { |
| 543 | size_t available = buffer_length_ - seek_position_; |
| 544 | if (0 == available) { |
| 545 | // Increase buffer size to the larger of: |
| 546 | // a) new position rounded up to next 256 bytes |
| 547 | // b) double the previous length |
andresp@webrtc.org | ff689be | 2015-02-12 11:54:26 +0000 | [diff] [blame] | 548 | size_t new_buffer_length = |
| 549 | std::max(((seek_position_ + bytes) | 0xFF) + 1, buffer_length_ * 2); |
henrike@webrtc.org | f048872 | 2014-05-13 18:00:26 +0000 | [diff] [blame] | 550 | StreamResult result = DoReserve(new_buffer_length, error); |
| 551 | if (SR_SUCCESS != result) { |
| 552 | return result; |
| 553 | } |
nisse | ede5da4 | 2017-01-12 05:15:36 -0800 | [diff] [blame] | 554 | RTC_DCHECK(buffer_length_ >= new_buffer_length); |
henrike@webrtc.org | f048872 | 2014-05-13 18:00:26 +0000 | [diff] [blame] | 555 | available = buffer_length_ - seek_position_; |
| 556 | } |
| 557 | |
| 558 | if (bytes > available) { |
| 559 | bytes = available; |
| 560 | } |
| 561 | memcpy(&buffer_[seek_position_], buffer, bytes); |
| 562 | seek_position_ += bytes; |
| 563 | if (data_length_ < seek_position_) { |
| 564 | data_length_ = seek_position_; |
| 565 | } |
| 566 | if (bytes_written) { |
| 567 | *bytes_written = bytes; |
| 568 | } |
| 569 | return SR_SUCCESS; |
| 570 | } |
| 571 | |
| 572 | void MemoryStreamBase::Close() { |
| 573 | // nothing to do |
| 574 | } |
| 575 | |
| 576 | bool MemoryStreamBase::SetPosition(size_t position) { |
| 577 | if (position > data_length_) |
| 578 | return false; |
| 579 | seek_position_ = position; |
| 580 | return true; |
| 581 | } |
| 582 | |
| 583 | bool MemoryStreamBase::GetPosition(size_t* position) const { |
| 584 | if (position) |
| 585 | *position = seek_position_; |
| 586 | return true; |
| 587 | } |
| 588 | |
| 589 | bool MemoryStreamBase::GetSize(size_t* size) const { |
| 590 | if (size) |
| 591 | *size = data_length_; |
| 592 | return true; |
| 593 | } |
| 594 | |
| 595 | bool MemoryStreamBase::GetAvailable(size_t* size) const { |
| 596 | if (size) |
| 597 | *size = data_length_ - seek_position_; |
| 598 | return true; |
| 599 | } |
| 600 | |
| 601 | bool MemoryStreamBase::ReserveSize(size_t size) { |
deadbeef | 37f5ecf | 2017-02-27 14:06:41 -0800 | [diff] [blame] | 602 | return (SR_SUCCESS == DoReserve(size, nullptr)); |
henrike@webrtc.org | f048872 | 2014-05-13 18:00:26 +0000 | [diff] [blame] | 603 | } |
| 604 | |
| 605 | StreamResult MemoryStreamBase::DoReserve(size_t size, int* error) { |
| 606 | return (buffer_length_ >= size) ? SR_SUCCESS : SR_EOS; |
| 607 | } |
| 608 | |
| 609 | /////////////////////////////////////////////////////////////////////////////// |
| 610 | |
deadbeef | 37f5ecf | 2017-02-27 14:06:41 -0800 | [diff] [blame] | 611 | MemoryStream::MemoryStream() : buffer_alloc_(nullptr) {} |
henrike@webrtc.org | f048872 | 2014-05-13 18:00:26 +0000 | [diff] [blame] | 612 | |
deadbeef | 37f5ecf | 2017-02-27 14:06:41 -0800 | [diff] [blame] | 613 | MemoryStream::MemoryStream(const char* data) : buffer_alloc_(nullptr) { |
henrike@webrtc.org | f048872 | 2014-05-13 18:00:26 +0000 | [diff] [blame] | 614 | SetData(data, strlen(data)); |
| 615 | } |
| 616 | |
| 617 | MemoryStream::MemoryStream(const void* data, size_t length) |
deadbeef | 37f5ecf | 2017-02-27 14:06:41 -0800 | [diff] [blame] | 618 | : buffer_alloc_(nullptr) { |
henrike@webrtc.org | f048872 | 2014-05-13 18:00:26 +0000 | [diff] [blame] | 619 | SetData(data, length); |
| 620 | } |
| 621 | |
| 622 | MemoryStream::~MemoryStream() { |
| 623 | delete [] buffer_alloc_; |
| 624 | } |
| 625 | |
| 626 | void MemoryStream::SetData(const void* data, size_t length) { |
| 627 | data_length_ = buffer_length_ = length; |
| 628 | delete [] buffer_alloc_; |
| 629 | buffer_alloc_ = new char[buffer_length_ + kAlignment]; |
| 630 | buffer_ = reinterpret_cast<char*>(ALIGNP(buffer_alloc_, kAlignment)); |
| 631 | memcpy(buffer_, data, data_length_); |
| 632 | seek_position_ = 0; |
| 633 | } |
| 634 | |
| 635 | StreamResult MemoryStream::DoReserve(size_t size, int* error) { |
| 636 | if (buffer_length_ >= size) |
| 637 | return SR_SUCCESS; |
| 638 | |
| 639 | if (char* new_buffer_alloc = new char[size + kAlignment]) { |
| 640 | char* new_buffer = reinterpret_cast<char*>( |
| 641 | ALIGNP(new_buffer_alloc, kAlignment)); |
| 642 | memcpy(new_buffer, buffer_, data_length_); |
| 643 | delete [] buffer_alloc_; |
| 644 | buffer_alloc_ = new_buffer_alloc; |
| 645 | buffer_ = new_buffer; |
| 646 | buffer_length_ = size; |
| 647 | return SR_SUCCESS; |
| 648 | } |
| 649 | |
| 650 | if (error) { |
| 651 | *error = ENOMEM; |
| 652 | } |
| 653 | return SR_ERROR; |
| 654 | } |
| 655 | |
| 656 | /////////////////////////////////////////////////////////////////////////////// |
deadbeef | f137e97 | 2017-03-23 15:45:49 -0700 | [diff] [blame] | 657 | |
| 658 | ExternalMemoryStream::ExternalMemoryStream() { |
| 659 | } |
| 660 | |
| 661 | ExternalMemoryStream::ExternalMemoryStream(void* data, size_t length) { |
| 662 | SetData(data, length); |
| 663 | } |
| 664 | |
| 665 | ExternalMemoryStream::~ExternalMemoryStream() { |
| 666 | } |
| 667 | |
| 668 | void ExternalMemoryStream::SetData(void* data, size_t length) { |
| 669 | data_length_ = buffer_length_ = length; |
| 670 | buffer_ = static_cast<char*>(data); |
| 671 | seek_position_ = 0; |
| 672 | } |
| 673 | |
| 674 | /////////////////////////////////////////////////////////////////////////////// |
henrike@webrtc.org | f048872 | 2014-05-13 18:00:26 +0000 | [diff] [blame] | 675 | // FifoBuffer |
| 676 | /////////////////////////////////////////////////////////////////////////////// |
| 677 | |
| 678 | FifoBuffer::FifoBuffer(size_t size) |
| 679 | : state_(SS_OPEN), buffer_(new char[size]), buffer_length_(size), |
| 680 | data_length_(0), read_position_(0), owner_(Thread::Current()) { |
| 681 | // all events are done on the owner_ thread |
| 682 | } |
| 683 | |
| 684 | FifoBuffer::FifoBuffer(size_t size, Thread* owner) |
| 685 | : state_(SS_OPEN), buffer_(new char[size]), buffer_length_(size), |
| 686 | data_length_(0), read_position_(0), owner_(owner) { |
| 687 | // all events are done on the owner_ thread |
| 688 | } |
| 689 | |
| 690 | FifoBuffer::~FifoBuffer() { |
| 691 | } |
| 692 | |
| 693 | bool FifoBuffer::GetBuffered(size_t* size) const { |
| 694 | CritScope cs(&crit_); |
| 695 | *size = data_length_; |
| 696 | return true; |
| 697 | } |
| 698 | |
| 699 | bool FifoBuffer::SetCapacity(size_t size) { |
| 700 | CritScope cs(&crit_); |
| 701 | if (data_length_ > size) { |
| 702 | return false; |
| 703 | } |
| 704 | |
| 705 | if (size != buffer_length_) { |
| 706 | char* buffer = new char[size]; |
| 707 | const size_t copy = data_length_; |
andresp@webrtc.org | ff689be | 2015-02-12 11:54:26 +0000 | [diff] [blame] | 708 | const size_t tail_copy = std::min(copy, buffer_length_ - read_position_); |
henrike@webrtc.org | f048872 | 2014-05-13 18:00:26 +0000 | [diff] [blame] | 709 | memcpy(buffer, &buffer_[read_position_], tail_copy); |
| 710 | memcpy(buffer + tail_copy, &buffer_[0], copy - tail_copy); |
| 711 | buffer_.reset(buffer); |
| 712 | read_position_ = 0; |
| 713 | buffer_length_ = size; |
| 714 | } |
| 715 | return true; |
| 716 | } |
| 717 | |
| 718 | StreamResult FifoBuffer::ReadOffset(void* buffer, size_t bytes, |
| 719 | size_t offset, size_t* bytes_read) { |
| 720 | CritScope cs(&crit_); |
| 721 | return ReadOffsetLocked(buffer, bytes, offset, bytes_read); |
| 722 | } |
| 723 | |
| 724 | StreamResult FifoBuffer::WriteOffset(const void* buffer, size_t bytes, |
| 725 | size_t offset, size_t* bytes_written) { |
| 726 | CritScope cs(&crit_); |
| 727 | return WriteOffsetLocked(buffer, bytes, offset, bytes_written); |
| 728 | } |
| 729 | |
| 730 | StreamState FifoBuffer::GetState() const { |
jbauch | 097d549 | 2016-02-09 02:30:34 -0800 | [diff] [blame] | 731 | CritScope cs(&crit_); |
henrike@webrtc.org | f048872 | 2014-05-13 18:00:26 +0000 | [diff] [blame] | 732 | return state_; |
| 733 | } |
| 734 | |
| 735 | StreamResult FifoBuffer::Read(void* buffer, size_t bytes, |
| 736 | size_t* bytes_read, int* error) { |
| 737 | CritScope cs(&crit_); |
| 738 | const bool was_writable = data_length_ < buffer_length_; |
| 739 | size_t copy = 0; |
| 740 | StreamResult result = ReadOffsetLocked(buffer, bytes, 0, ©); |
| 741 | |
| 742 | if (result == SR_SUCCESS) { |
| 743 | // If read was successful then adjust the read position and number of |
| 744 | // bytes buffered. |
| 745 | read_position_ = (read_position_ + copy) % buffer_length_; |
| 746 | data_length_ -= copy; |
| 747 | if (bytes_read) { |
| 748 | *bytes_read = copy; |
| 749 | } |
| 750 | |
| 751 | // if we were full before, and now we're not, post an event |
| 752 | if (!was_writable && copy > 0) { |
| 753 | PostEvent(owner_, SE_WRITE, 0); |
| 754 | } |
| 755 | } |
| 756 | return result; |
| 757 | } |
| 758 | |
| 759 | StreamResult FifoBuffer::Write(const void* buffer, size_t bytes, |
| 760 | size_t* bytes_written, int* error) { |
| 761 | CritScope cs(&crit_); |
| 762 | |
| 763 | const bool was_readable = (data_length_ > 0); |
| 764 | size_t copy = 0; |
| 765 | StreamResult result = WriteOffsetLocked(buffer, bytes, 0, ©); |
| 766 | |
| 767 | if (result == SR_SUCCESS) { |
| 768 | // If write was successful then adjust the number of readable bytes. |
| 769 | data_length_ += copy; |
| 770 | if (bytes_written) { |
| 771 | *bytes_written = copy; |
| 772 | } |
| 773 | |
| 774 | // if we didn't have any data to read before, and now we do, post an event |
| 775 | if (!was_readable && copy > 0) { |
| 776 | PostEvent(owner_, SE_READ, 0); |
| 777 | } |
| 778 | } |
| 779 | return result; |
| 780 | } |
| 781 | |
| 782 | void FifoBuffer::Close() { |
| 783 | CritScope cs(&crit_); |
| 784 | state_ = SS_CLOSED; |
| 785 | } |
| 786 | |
| 787 | const void* FifoBuffer::GetReadData(size_t* size) { |
| 788 | CritScope cs(&crit_); |
| 789 | *size = (read_position_ + data_length_ <= buffer_length_) ? |
| 790 | data_length_ : buffer_length_ - read_position_; |
| 791 | return &buffer_[read_position_]; |
| 792 | } |
| 793 | |
| 794 | void FifoBuffer::ConsumeReadData(size_t size) { |
| 795 | CritScope cs(&crit_); |
nisse | ede5da4 | 2017-01-12 05:15:36 -0800 | [diff] [blame] | 796 | RTC_DCHECK(size <= data_length_); |
henrike@webrtc.org | f048872 | 2014-05-13 18:00:26 +0000 | [diff] [blame] | 797 | const bool was_writable = data_length_ < buffer_length_; |
| 798 | read_position_ = (read_position_ + size) % buffer_length_; |
| 799 | data_length_ -= size; |
| 800 | if (!was_writable && size > 0) { |
| 801 | PostEvent(owner_, SE_WRITE, 0); |
| 802 | } |
| 803 | } |
| 804 | |
| 805 | void* FifoBuffer::GetWriteBuffer(size_t* size) { |
| 806 | CritScope cs(&crit_); |
| 807 | if (state_ == SS_CLOSED) { |
deadbeef | 37f5ecf | 2017-02-27 14:06:41 -0800 | [diff] [blame] | 808 | return nullptr; |
henrike@webrtc.org | f048872 | 2014-05-13 18:00:26 +0000 | [diff] [blame] | 809 | } |
| 810 | |
| 811 | // if empty, reset the write position to the beginning, so we can get |
| 812 | // the biggest possible block |
| 813 | if (data_length_ == 0) { |
| 814 | read_position_ = 0; |
| 815 | } |
| 816 | |
| 817 | const size_t write_position = (read_position_ + data_length_) |
| 818 | % buffer_length_; |
| 819 | *size = (write_position > read_position_ || data_length_ == 0) ? |
| 820 | buffer_length_ - write_position : read_position_ - write_position; |
| 821 | return &buffer_[write_position]; |
| 822 | } |
| 823 | |
| 824 | void FifoBuffer::ConsumeWriteBuffer(size_t size) { |
| 825 | CritScope cs(&crit_); |
nisse | ede5da4 | 2017-01-12 05:15:36 -0800 | [diff] [blame] | 826 | RTC_DCHECK(size <= buffer_length_ - data_length_); |
henrike@webrtc.org | f048872 | 2014-05-13 18:00:26 +0000 | [diff] [blame] | 827 | const bool was_readable = (data_length_ > 0); |
| 828 | data_length_ += size; |
| 829 | if (!was_readable && size > 0) { |
| 830 | PostEvent(owner_, SE_READ, 0); |
| 831 | } |
| 832 | } |
| 833 | |
| 834 | bool FifoBuffer::GetWriteRemaining(size_t* size) const { |
| 835 | CritScope cs(&crit_); |
| 836 | *size = buffer_length_ - data_length_; |
| 837 | return true; |
| 838 | } |
| 839 | |
| 840 | StreamResult FifoBuffer::ReadOffsetLocked(void* buffer, |
| 841 | size_t bytes, |
| 842 | size_t offset, |
| 843 | size_t* bytes_read) { |
| 844 | if (offset >= data_length_) { |
| 845 | return (state_ != SS_CLOSED) ? SR_BLOCK : SR_EOS; |
| 846 | } |
| 847 | |
| 848 | const size_t available = data_length_ - offset; |
| 849 | const size_t read_position = (read_position_ + offset) % buffer_length_; |
andresp@webrtc.org | ff689be | 2015-02-12 11:54:26 +0000 | [diff] [blame] | 850 | const size_t copy = std::min(bytes, available); |
| 851 | const size_t tail_copy = std::min(copy, buffer_length_ - read_position); |
henrike@webrtc.org | f048872 | 2014-05-13 18:00:26 +0000 | [diff] [blame] | 852 | char* const p = static_cast<char*>(buffer); |
| 853 | memcpy(p, &buffer_[read_position], tail_copy); |
| 854 | memcpy(p + tail_copy, &buffer_[0], copy - tail_copy); |
| 855 | |
| 856 | if (bytes_read) { |
| 857 | *bytes_read = copy; |
| 858 | } |
| 859 | return SR_SUCCESS; |
| 860 | } |
| 861 | |
| 862 | StreamResult FifoBuffer::WriteOffsetLocked(const void* buffer, |
| 863 | size_t bytes, |
| 864 | size_t offset, |
| 865 | size_t* bytes_written) { |
| 866 | if (state_ == SS_CLOSED) { |
| 867 | return SR_EOS; |
| 868 | } |
| 869 | |
| 870 | if (data_length_ + offset >= buffer_length_) { |
| 871 | return SR_BLOCK; |
| 872 | } |
| 873 | |
| 874 | const size_t available = buffer_length_ - data_length_ - offset; |
| 875 | const size_t write_position = (read_position_ + data_length_ + offset) |
| 876 | % buffer_length_; |
andresp@webrtc.org | ff689be | 2015-02-12 11:54:26 +0000 | [diff] [blame] | 877 | const size_t copy = std::min(bytes, available); |
| 878 | const size_t tail_copy = std::min(copy, buffer_length_ - write_position); |
henrike@webrtc.org | f048872 | 2014-05-13 18:00:26 +0000 | [diff] [blame] | 879 | const char* const p = static_cast<const char*>(buffer); |
| 880 | memcpy(&buffer_[write_position], p, tail_copy); |
| 881 | memcpy(&buffer_[0], p + tail_copy, copy - tail_copy); |
| 882 | |
| 883 | if (bytes_written) { |
| 884 | *bytes_written = copy; |
| 885 | } |
| 886 | return SR_SUCCESS; |
| 887 | } |
| 888 | |
deadbeef | f137e97 | 2017-03-23 15:45:49 -0700 | [diff] [blame] | 889 | |
| 890 | |
| 891 | /////////////////////////////////////////////////////////////////////////////// |
| 892 | // LoggingAdapter |
| 893 | /////////////////////////////////////////////////////////////////////////////// |
| 894 | |
| 895 | LoggingAdapter::LoggingAdapter(StreamInterface* stream, LoggingSeverity level, |
| 896 | const std::string& label, bool hex_mode) |
| 897 | : StreamAdapterInterface(stream), level_(level), hex_mode_(hex_mode) { |
| 898 | set_label(label); |
| 899 | } |
| 900 | |
| 901 | void LoggingAdapter::set_label(const std::string& label) { |
| 902 | label_.assign("["); |
| 903 | label_.append(label); |
| 904 | label_.append("]"); |
| 905 | } |
| 906 | |
| 907 | StreamResult LoggingAdapter::Read(void* buffer, size_t buffer_len, |
| 908 | size_t* read, int* error) { |
| 909 | size_t local_read; if (!read) read = &local_read; |
| 910 | StreamResult result = StreamAdapterInterface::Read(buffer, buffer_len, read, |
| 911 | error); |
| 912 | if (result == SR_SUCCESS) { |
| 913 | LogMultiline(level_, label_.c_str(), true, buffer, *read, hex_mode_, &lms_); |
| 914 | } |
| 915 | return result; |
| 916 | } |
| 917 | |
| 918 | StreamResult LoggingAdapter::Write(const void* data, size_t data_len, |
| 919 | size_t* written, int* error) { |
| 920 | size_t local_written; |
| 921 | if (!written) written = &local_written; |
| 922 | StreamResult result = StreamAdapterInterface::Write(data, data_len, written, |
| 923 | error); |
| 924 | if (result == SR_SUCCESS) { |
| 925 | LogMultiline(level_, label_.c_str(), false, data, *written, hex_mode_, |
| 926 | &lms_); |
| 927 | } |
| 928 | return result; |
| 929 | } |
| 930 | |
| 931 | void LoggingAdapter::Close() { |
| 932 | LogMultiline(level_, label_.c_str(), false, nullptr, 0, hex_mode_, &lms_); |
| 933 | LogMultiline(level_, label_.c_str(), true, nullptr, 0, hex_mode_, &lms_); |
| 934 | LOG_V(level_) << label_ << " Closed locally"; |
| 935 | StreamAdapterInterface::Close(); |
| 936 | } |
| 937 | |
| 938 | void LoggingAdapter::OnEvent(StreamInterface* stream, int events, int err) { |
| 939 | if (events & SE_OPEN) { |
| 940 | LOG_V(level_) << label_ << " Open"; |
| 941 | } else if (events & SE_CLOSE) { |
| 942 | LogMultiline(level_, label_.c_str(), false, nullptr, 0, hex_mode_, &lms_); |
| 943 | LogMultiline(level_, label_.c_str(), true, nullptr, 0, hex_mode_, &lms_); |
| 944 | LOG_V(level_) << label_ << " Closed with error: " << err; |
| 945 | } |
| 946 | StreamAdapterInterface::OnEvent(stream, events, err); |
| 947 | } |
| 948 | |
henrike@webrtc.org | f048872 | 2014-05-13 18:00:26 +0000 | [diff] [blame] | 949 | /////////////////////////////////////////////////////////////////////////////// |
| 950 | // StringStream - Reads/Writes to an external std::string |
| 951 | /////////////////////////////////////////////////////////////////////////////// |
| 952 | |
Tommi | 00aac5a | 2015-05-25 11:25:59 +0200 | [diff] [blame] | 953 | StringStream::StringStream(std::string* str) |
| 954 | : str_(*str), read_pos_(0), read_only_(false) { |
henrike@webrtc.org | f048872 | 2014-05-13 18:00:26 +0000 | [diff] [blame] | 955 | } |
| 956 | |
| 957 | StringStream::StringStream(const std::string& str) |
| 958 | : str_(const_cast<std::string&>(str)), read_pos_(0), read_only_(true) { |
| 959 | } |
| 960 | |
| 961 | StreamState StringStream::GetState() const { |
| 962 | return SS_OPEN; |
| 963 | } |
| 964 | |
| 965 | StreamResult StringStream::Read(void* buffer, size_t buffer_len, |
| 966 | size_t* read, int* error) { |
andresp@webrtc.org | ff689be | 2015-02-12 11:54:26 +0000 | [diff] [blame] | 967 | size_t available = std::min(buffer_len, str_.size() - read_pos_); |
henrike@webrtc.org | f048872 | 2014-05-13 18:00:26 +0000 | [diff] [blame] | 968 | if (!available) |
| 969 | return SR_EOS; |
| 970 | memcpy(buffer, str_.data() + read_pos_, available); |
| 971 | read_pos_ += available; |
| 972 | if (read) |
| 973 | *read = available; |
| 974 | return SR_SUCCESS; |
| 975 | } |
| 976 | |
| 977 | StreamResult StringStream::Write(const void* data, size_t data_len, |
| 978 | size_t* written, int* error) { |
| 979 | if (read_only_) { |
| 980 | if (error) { |
| 981 | *error = -1; |
| 982 | } |
| 983 | return SR_ERROR; |
| 984 | } |
| 985 | str_.append(static_cast<const char*>(data), |
| 986 | static_cast<const char*>(data) + data_len); |
| 987 | if (written) |
| 988 | *written = data_len; |
| 989 | return SR_SUCCESS; |
| 990 | } |
| 991 | |
| 992 | void StringStream::Close() { |
| 993 | } |
| 994 | |
| 995 | bool StringStream::SetPosition(size_t position) { |
| 996 | if (position > str_.size()) |
| 997 | return false; |
| 998 | read_pos_ = position; |
| 999 | return true; |
| 1000 | } |
| 1001 | |
| 1002 | bool StringStream::GetPosition(size_t* position) const { |
| 1003 | if (position) |
| 1004 | *position = read_pos_; |
| 1005 | return true; |
| 1006 | } |
| 1007 | |
| 1008 | bool StringStream::GetSize(size_t* size) const { |
| 1009 | if (size) |
| 1010 | *size = str_.size(); |
| 1011 | return true; |
| 1012 | } |
| 1013 | |
| 1014 | bool StringStream::GetAvailable(size_t* size) const { |
| 1015 | if (size) |
| 1016 | *size = str_.size() - read_pos_; |
| 1017 | return true; |
| 1018 | } |
| 1019 | |
| 1020 | bool StringStream::ReserveSize(size_t size) { |
| 1021 | if (read_only_) |
| 1022 | return false; |
| 1023 | str_.reserve(size); |
| 1024 | return true; |
| 1025 | } |
| 1026 | |
| 1027 | /////////////////////////////////////////////////////////////////////////////// |
deadbeef | f137e97 | 2017-03-23 15:45:49 -0700 | [diff] [blame] | 1028 | // StreamReference |
| 1029 | /////////////////////////////////////////////////////////////////////////////// |
| 1030 | |
| 1031 | StreamReference::StreamReference(StreamInterface* stream) |
| 1032 | : StreamAdapterInterface(stream, false) { |
| 1033 | // owner set to false so the destructor does not free the stream. |
| 1034 | stream_ref_count_ = new StreamRefCount(stream); |
| 1035 | } |
| 1036 | |
| 1037 | StreamInterface* StreamReference::NewReference() { |
| 1038 | stream_ref_count_->AddReference(); |
| 1039 | return new StreamReference(stream_ref_count_, stream()); |
| 1040 | } |
| 1041 | |
| 1042 | StreamReference::~StreamReference() { |
| 1043 | stream_ref_count_->Release(); |
| 1044 | } |
| 1045 | |
| 1046 | StreamReference::StreamReference(StreamRefCount* stream_ref_count, |
| 1047 | StreamInterface* stream) |
| 1048 | : StreamAdapterInterface(stream, false), |
| 1049 | stream_ref_count_(stream_ref_count) { |
| 1050 | } |
| 1051 | |
| 1052 | /////////////////////////////////////////////////////////////////////////////// |
henrike@webrtc.org | f048872 | 2014-05-13 18:00:26 +0000 | [diff] [blame] | 1053 | |
| 1054 | StreamResult Flow(StreamInterface* source, |
deadbeef | 37f5ecf | 2017-02-27 14:06:41 -0800 | [diff] [blame] | 1055 | char* buffer, |
| 1056 | size_t buffer_len, |
henrike@webrtc.org | f048872 | 2014-05-13 18:00:26 +0000 | [diff] [blame] | 1057 | StreamInterface* sink, |
deadbeef | 37f5ecf | 2017-02-27 14:06:41 -0800 | [diff] [blame] | 1058 | size_t* data_len /* = nullptr */) { |
nisse | ede5da4 | 2017-01-12 05:15:36 -0800 | [diff] [blame] | 1059 | RTC_DCHECK(buffer_len > 0); |
henrike@webrtc.org | f048872 | 2014-05-13 18:00:26 +0000 | [diff] [blame] | 1060 | |
| 1061 | StreamResult result; |
| 1062 | size_t count, read_pos, write_pos; |
| 1063 | if (data_len) { |
| 1064 | read_pos = *data_len; |
| 1065 | } else { |
| 1066 | read_pos = 0; |
| 1067 | } |
| 1068 | |
| 1069 | bool end_of_stream = false; |
| 1070 | do { |
| 1071 | // Read until buffer is full, end of stream, or error |
| 1072 | while (!end_of_stream && (read_pos < buffer_len)) { |
deadbeef | 37f5ecf | 2017-02-27 14:06:41 -0800 | [diff] [blame] | 1073 | result = source->Read(buffer + read_pos, buffer_len - read_pos, &count, |
| 1074 | nullptr); |
henrike@webrtc.org | f048872 | 2014-05-13 18:00:26 +0000 | [diff] [blame] | 1075 | if (result == SR_EOS) { |
| 1076 | end_of_stream = true; |
| 1077 | } else if (result != SR_SUCCESS) { |
| 1078 | if (data_len) { |
| 1079 | *data_len = read_pos; |
| 1080 | } |
| 1081 | return result; |
| 1082 | } else { |
| 1083 | read_pos += count; |
| 1084 | } |
| 1085 | } |
| 1086 | |
| 1087 | // Write until buffer is empty, or error (including end of stream) |
| 1088 | write_pos = 0; |
| 1089 | while (write_pos < read_pos) { |
deadbeef | 37f5ecf | 2017-02-27 14:06:41 -0800 | [diff] [blame] | 1090 | result = sink->Write(buffer + write_pos, read_pos - write_pos, &count, |
| 1091 | nullptr); |
henrike@webrtc.org | f048872 | 2014-05-13 18:00:26 +0000 | [diff] [blame] | 1092 | if (result != SR_SUCCESS) { |
| 1093 | if (data_len) { |
| 1094 | *data_len = read_pos - write_pos; |
| 1095 | if (write_pos > 0) { |
| 1096 | memmove(buffer, buffer + write_pos, *data_len); |
| 1097 | } |
| 1098 | } |
| 1099 | return result; |
| 1100 | } |
| 1101 | write_pos += count; |
| 1102 | } |
| 1103 | |
| 1104 | read_pos = 0; |
| 1105 | } while (!end_of_stream); |
| 1106 | |
| 1107 | if (data_len) { |
| 1108 | *data_len = 0; |
| 1109 | } |
| 1110 | return SR_SUCCESS; |
| 1111 | } |
| 1112 | |
| 1113 | /////////////////////////////////////////////////////////////////////////////// |
| 1114 | |
| 1115 | } // namespace rtc |