henrike@webrtc.org | 47be73b | 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> |
| 17 | #include <string> |
| 18 | #include "webrtc/base/basictypes.h" |
| 19 | #include "webrtc/base/common.h" |
| 20 | #include "webrtc/base/logging.h" |
| 21 | #include "webrtc/base/messagequeue.h" |
| 22 | #include "webrtc/base/stream.h" |
| 23 | #include "webrtc/base/stringencode.h" |
| 24 | #include "webrtc/base/stringutils.h" |
| 25 | #include "webrtc/base/thread.h" |
| 26 | #include "webrtc/base/timeutils.h" |
| 27 | |
| 28 | #if defined(WEBRTC_WIN) |
| 29 | #include "webrtc/base/win32.h" |
| 30 | #define fileno _fileno |
| 31 | #endif |
| 32 | |
| 33 | namespace rtc { |
| 34 | |
| 35 | /////////////////////////////////////////////////////////////////////////////// |
| 36 | // StreamInterface |
| 37 | /////////////////////////////////////////////////////////////////////////////// |
| 38 | StreamInterface::~StreamInterface() { |
| 39 | } |
| 40 | |
| 41 | StreamResult StreamInterface::WriteAll(const void* data, size_t data_len, |
| 42 | size_t* written, int* error) { |
| 43 | StreamResult result = SR_SUCCESS; |
| 44 | size_t total_written = 0, current_written; |
| 45 | while (total_written < data_len) { |
| 46 | result = Write(static_cast<const char*>(data) + total_written, |
| 47 | data_len - total_written, ¤t_written, error); |
| 48 | if (result != SR_SUCCESS) |
| 49 | break; |
| 50 | total_written += current_written; |
| 51 | } |
| 52 | if (written) |
| 53 | *written = total_written; |
| 54 | return result; |
| 55 | } |
| 56 | |
| 57 | StreamResult StreamInterface::ReadAll(void* buffer, size_t buffer_len, |
| 58 | size_t* read, int* error) { |
| 59 | StreamResult result = SR_SUCCESS; |
| 60 | size_t total_read = 0, current_read; |
| 61 | while (total_read < buffer_len) { |
| 62 | result = Read(static_cast<char*>(buffer) + total_read, |
| 63 | buffer_len - total_read, ¤t_read, error); |
| 64 | if (result != SR_SUCCESS) |
| 65 | break; |
| 66 | total_read += current_read; |
| 67 | } |
| 68 | if (read) |
| 69 | *read = total_read; |
| 70 | return result; |
| 71 | } |
| 72 | |
| 73 | StreamResult StreamInterface::ReadLine(std::string* line) { |
| 74 | line->clear(); |
| 75 | StreamResult result = SR_SUCCESS; |
| 76 | while (true) { |
| 77 | char ch; |
| 78 | result = Read(&ch, sizeof(ch), NULL, NULL); |
| 79 | if (result != SR_SUCCESS) { |
| 80 | break; |
| 81 | } |
| 82 | if (ch == '\n') { |
| 83 | break; |
| 84 | } |
| 85 | line->push_back(ch); |
| 86 | } |
| 87 | if (!line->empty()) { // give back the line we've collected so far with |
| 88 | result = SR_SUCCESS; // a success code. Otherwise return the last code |
| 89 | } |
| 90 | return result; |
| 91 | } |
| 92 | |
| 93 | void StreamInterface::PostEvent(Thread* t, int events, int err) { |
| 94 | t->Post(this, MSG_POST_EVENT, new StreamEventData(events, err)); |
| 95 | } |
| 96 | |
| 97 | void StreamInterface::PostEvent(int events, int err) { |
| 98 | PostEvent(Thread::Current(), events, err); |
| 99 | } |
| 100 | |
| 101 | StreamInterface::StreamInterface() { |
| 102 | } |
| 103 | |
| 104 | void StreamInterface::OnMessage(Message* msg) { |
| 105 | if (MSG_POST_EVENT == msg->message_id) { |
| 106 | StreamEventData* pe = static_cast<StreamEventData*>(msg->pdata); |
| 107 | SignalEvent(this, pe->events, pe->error); |
| 108 | delete msg->pdata; |
| 109 | } |
| 110 | } |
| 111 | |
| 112 | /////////////////////////////////////////////////////////////////////////////// |
| 113 | // StreamAdapterInterface |
| 114 | /////////////////////////////////////////////////////////////////////////////// |
| 115 | |
| 116 | StreamAdapterInterface::StreamAdapterInterface(StreamInterface* stream, |
| 117 | bool owned) |
| 118 | : stream_(stream), owned_(owned) { |
| 119 | if (NULL != stream_) |
| 120 | stream_->SignalEvent.connect(this, &StreamAdapterInterface::OnEvent); |
| 121 | } |
| 122 | |
| 123 | void StreamAdapterInterface::Attach(StreamInterface* stream, bool owned) { |
| 124 | if (NULL != stream_) |
| 125 | stream_->SignalEvent.disconnect(this); |
| 126 | if (owned_) |
| 127 | delete stream_; |
| 128 | stream_ = stream; |
| 129 | owned_ = owned; |
| 130 | if (NULL != stream_) |
| 131 | stream_->SignalEvent.connect(this, &StreamAdapterInterface::OnEvent); |
| 132 | } |
| 133 | |
| 134 | StreamInterface* StreamAdapterInterface::Detach() { |
| 135 | if (NULL != stream_) |
| 136 | stream_->SignalEvent.disconnect(this); |
| 137 | StreamInterface* stream = stream_; |
| 138 | stream_ = NULL; |
| 139 | return stream; |
| 140 | } |
| 141 | |
| 142 | StreamAdapterInterface::~StreamAdapterInterface() { |
| 143 | if (owned_) |
| 144 | delete stream_; |
| 145 | } |
| 146 | |
| 147 | /////////////////////////////////////////////////////////////////////////////// |
| 148 | // StreamTap |
| 149 | /////////////////////////////////////////////////////////////////////////////// |
| 150 | |
| 151 | StreamTap::StreamTap(StreamInterface* stream, StreamInterface* tap) |
| 152 | : StreamAdapterInterface(stream), tap_(), tap_result_(SR_SUCCESS), |
| 153 | tap_error_(0) { |
| 154 | AttachTap(tap); |
| 155 | } |
| 156 | |
| 157 | void StreamTap::AttachTap(StreamInterface* tap) { |
| 158 | tap_.reset(tap); |
| 159 | } |
| 160 | |
| 161 | StreamInterface* StreamTap::DetachTap() { |
| 162 | return tap_.release(); |
| 163 | } |
| 164 | |
| 165 | StreamResult StreamTap::GetTapResult(int* error) { |
| 166 | if (error) { |
| 167 | *error = tap_error_; |
| 168 | } |
| 169 | return tap_result_; |
| 170 | } |
| 171 | |
| 172 | StreamResult StreamTap::Read(void* buffer, size_t buffer_len, |
| 173 | size_t* read, int* error) { |
| 174 | size_t backup_read; |
| 175 | if (!read) { |
| 176 | read = &backup_read; |
| 177 | } |
| 178 | StreamResult res = StreamAdapterInterface::Read(buffer, buffer_len, |
| 179 | read, error); |
| 180 | if ((res == SR_SUCCESS) && (tap_result_ == SR_SUCCESS)) { |
| 181 | tap_result_ = tap_->WriteAll(buffer, *read, NULL, &tap_error_); |
| 182 | } |
| 183 | return res; |
| 184 | } |
| 185 | |
| 186 | StreamResult StreamTap::Write(const void* data, size_t data_len, |
| 187 | size_t* written, int* error) { |
| 188 | size_t backup_written; |
| 189 | if (!written) { |
| 190 | written = &backup_written; |
| 191 | } |
| 192 | StreamResult res = StreamAdapterInterface::Write(data, data_len, |
| 193 | written, error); |
| 194 | if ((res == SR_SUCCESS) && (tap_result_ == SR_SUCCESS)) { |
| 195 | tap_result_ = tap_->WriteAll(data, *written, NULL, &tap_error_); |
| 196 | } |
| 197 | return res; |
| 198 | } |
| 199 | |
| 200 | /////////////////////////////////////////////////////////////////////////////// |
| 201 | // StreamSegment |
| 202 | /////////////////////////////////////////////////////////////////////////////// |
| 203 | |
| 204 | StreamSegment::StreamSegment(StreamInterface* stream) |
| 205 | : StreamAdapterInterface(stream), start_(SIZE_UNKNOWN), pos_(0), |
| 206 | length_(SIZE_UNKNOWN) { |
| 207 | // It's ok for this to fail, in which case start_ is left as SIZE_UNKNOWN. |
| 208 | stream->GetPosition(&start_); |
| 209 | } |
| 210 | |
| 211 | StreamSegment::StreamSegment(StreamInterface* stream, size_t length) |
| 212 | : StreamAdapterInterface(stream), start_(SIZE_UNKNOWN), pos_(0), |
| 213 | length_(length) { |
| 214 | // It's ok for this to fail, in which case start_ is left as SIZE_UNKNOWN. |
| 215 | stream->GetPosition(&start_); |
| 216 | } |
| 217 | |
| 218 | StreamResult StreamSegment::Read(void* buffer, size_t buffer_len, |
| 219 | size_t* read, int* error) { |
| 220 | if (SIZE_UNKNOWN != length_) { |
| 221 | if (pos_ >= length_) |
| 222 | return SR_EOS; |
| 223 | buffer_len = _min(buffer_len, length_ - pos_); |
| 224 | } |
| 225 | size_t backup_read; |
| 226 | if (!read) { |
| 227 | read = &backup_read; |
| 228 | } |
| 229 | StreamResult result = StreamAdapterInterface::Read(buffer, buffer_len, |
| 230 | read, error); |
| 231 | if (SR_SUCCESS == result) { |
| 232 | pos_ += *read; |
| 233 | } |
| 234 | return result; |
| 235 | } |
| 236 | |
| 237 | bool StreamSegment::SetPosition(size_t position) { |
| 238 | if (SIZE_UNKNOWN == start_) |
| 239 | return false; // Not seekable |
| 240 | if ((SIZE_UNKNOWN != length_) && (position > length_)) |
| 241 | return false; // Seek past end of segment |
| 242 | if (!StreamAdapterInterface::SetPosition(start_ + position)) |
| 243 | return false; |
| 244 | pos_ = position; |
| 245 | return true; |
| 246 | } |
| 247 | |
| 248 | bool StreamSegment::GetPosition(size_t* position) const { |
| 249 | if (SIZE_UNKNOWN == start_) |
| 250 | return false; // Not seekable |
| 251 | if (!StreamAdapterInterface::GetPosition(position)) |
| 252 | return false; |
| 253 | if (position) { |
| 254 | ASSERT(*position >= start_); |
| 255 | *position -= start_; |
| 256 | } |
| 257 | return true; |
| 258 | } |
| 259 | |
| 260 | bool StreamSegment::GetSize(size_t* size) const { |
| 261 | if (!StreamAdapterInterface::GetSize(size)) |
| 262 | return false; |
| 263 | if (size) { |
| 264 | if (SIZE_UNKNOWN != start_) { |
| 265 | ASSERT(*size >= start_); |
| 266 | *size -= start_; |
| 267 | } |
| 268 | if (SIZE_UNKNOWN != length_) { |
| 269 | *size = _min(*size, length_); |
| 270 | } |
| 271 | } |
| 272 | return true; |
| 273 | } |
| 274 | |
| 275 | bool StreamSegment::GetAvailable(size_t* size) const { |
| 276 | if (!StreamAdapterInterface::GetAvailable(size)) |
| 277 | return false; |
| 278 | if (size && (SIZE_UNKNOWN != length_)) |
| 279 | *size = _min(*size, length_ - pos_); |
| 280 | return true; |
| 281 | } |
| 282 | |
| 283 | /////////////////////////////////////////////////////////////////////////////// |
| 284 | // NullStream |
| 285 | /////////////////////////////////////////////////////////////////////////////// |
| 286 | |
| 287 | NullStream::NullStream() { |
| 288 | } |
| 289 | |
| 290 | NullStream::~NullStream() { |
| 291 | } |
| 292 | |
| 293 | StreamState NullStream::GetState() const { |
| 294 | return SS_OPEN; |
| 295 | } |
| 296 | |
| 297 | StreamResult NullStream::Read(void* buffer, size_t buffer_len, |
| 298 | size_t* read, int* error) { |
| 299 | if (error) *error = -1; |
| 300 | return SR_ERROR; |
| 301 | } |
| 302 | |
| 303 | StreamResult NullStream::Write(const void* data, size_t data_len, |
| 304 | size_t* written, int* error) { |
| 305 | if (written) *written = data_len; |
| 306 | return SR_SUCCESS; |
| 307 | } |
| 308 | |
| 309 | void NullStream::Close() { |
| 310 | } |
| 311 | |
| 312 | /////////////////////////////////////////////////////////////////////////////// |
| 313 | // FileStream |
| 314 | /////////////////////////////////////////////////////////////////////////////// |
| 315 | |
| 316 | FileStream::FileStream() : file_(NULL) { |
| 317 | } |
| 318 | |
| 319 | FileStream::~FileStream() { |
| 320 | FileStream::Close(); |
| 321 | } |
| 322 | |
| 323 | bool FileStream::Open(const std::string& filename, const char* mode, |
| 324 | int* error) { |
| 325 | Close(); |
| 326 | #if defined(WEBRTC_WIN) |
| 327 | std::wstring wfilename; |
| 328 | if (Utf8ToWindowsFilename(filename, &wfilename)) { |
| 329 | file_ = _wfopen(wfilename.c_str(), ToUtf16(mode).c_str()); |
| 330 | } else { |
| 331 | if (error) { |
| 332 | *error = -1; |
| 333 | return false; |
| 334 | } |
| 335 | } |
| 336 | #else |
| 337 | file_ = fopen(filename.c_str(), mode); |
| 338 | #endif |
| 339 | if (!file_ && error) { |
| 340 | *error = errno; |
| 341 | } |
| 342 | return (file_ != NULL); |
| 343 | } |
| 344 | |
| 345 | bool FileStream::OpenShare(const std::string& filename, const char* mode, |
| 346 | int shflag, int* error) { |
| 347 | Close(); |
| 348 | #if defined(WEBRTC_WIN) |
| 349 | std::wstring wfilename; |
| 350 | if (Utf8ToWindowsFilename(filename, &wfilename)) { |
| 351 | file_ = _wfsopen(wfilename.c_str(), ToUtf16(mode).c_str(), shflag); |
| 352 | if (!file_ && error) { |
| 353 | *error = errno; |
| 354 | return false; |
| 355 | } |
| 356 | return file_ != NULL; |
| 357 | } else { |
| 358 | if (error) { |
| 359 | *error = -1; |
| 360 | } |
| 361 | return false; |
| 362 | } |
| 363 | #else |
| 364 | return Open(filename, mode, error); |
| 365 | #endif |
| 366 | } |
| 367 | |
| 368 | bool FileStream::DisableBuffering() { |
| 369 | if (!file_) |
| 370 | return false; |
| 371 | return (setvbuf(file_, NULL, _IONBF, 0) == 0); |
| 372 | } |
| 373 | |
| 374 | StreamState FileStream::GetState() const { |
| 375 | return (file_ == NULL) ? SS_CLOSED : SS_OPEN; |
| 376 | } |
| 377 | |
| 378 | StreamResult FileStream::Read(void* buffer, size_t buffer_len, |
| 379 | size_t* read, int* error) { |
| 380 | if (!file_) |
| 381 | return SR_EOS; |
| 382 | size_t result = fread(buffer, 1, buffer_len, file_); |
| 383 | if ((result == 0) && (buffer_len > 0)) { |
| 384 | if (feof(file_)) |
| 385 | return SR_EOS; |
| 386 | if (error) |
| 387 | *error = errno; |
| 388 | return SR_ERROR; |
| 389 | } |
| 390 | if (read) |
| 391 | *read = result; |
| 392 | return SR_SUCCESS; |
| 393 | } |
| 394 | |
| 395 | StreamResult FileStream::Write(const void* data, size_t data_len, |
| 396 | size_t* written, int* error) { |
| 397 | if (!file_) |
| 398 | return SR_EOS; |
| 399 | size_t result = fwrite(data, 1, data_len, file_); |
| 400 | if ((result == 0) && (data_len > 0)) { |
| 401 | if (error) |
| 402 | *error = errno; |
| 403 | return SR_ERROR; |
| 404 | } |
| 405 | if (written) |
| 406 | *written = result; |
| 407 | return SR_SUCCESS; |
| 408 | } |
| 409 | |
| 410 | void FileStream::Close() { |
| 411 | if (file_) { |
| 412 | DoClose(); |
| 413 | file_ = NULL; |
| 414 | } |
| 415 | } |
| 416 | |
| 417 | bool FileStream::SetPosition(size_t position) { |
| 418 | if (!file_) |
| 419 | return false; |
| 420 | return (fseek(file_, static_cast<int>(position), SEEK_SET) == 0); |
| 421 | } |
| 422 | |
| 423 | bool FileStream::GetPosition(size_t* position) const { |
| 424 | ASSERT(NULL != position); |
| 425 | if (!file_) |
| 426 | return false; |
| 427 | long result = ftell(file_); |
| 428 | if (result < 0) |
| 429 | return false; |
| 430 | if (position) |
| 431 | *position = result; |
| 432 | return true; |
| 433 | } |
| 434 | |
| 435 | bool FileStream::GetSize(size_t* size) const { |
| 436 | ASSERT(NULL != size); |
| 437 | if (!file_) |
| 438 | return false; |
| 439 | struct stat file_stats; |
| 440 | if (fstat(fileno(file_), &file_stats) != 0) |
| 441 | return false; |
| 442 | if (size) |
| 443 | *size = file_stats.st_size; |
| 444 | return true; |
| 445 | } |
| 446 | |
| 447 | bool FileStream::GetAvailable(size_t* size) const { |
| 448 | ASSERT(NULL != size); |
| 449 | if (!GetSize(size)) |
| 450 | return false; |
| 451 | long result = ftell(file_); |
| 452 | if (result < 0) |
| 453 | return false; |
| 454 | if (size) |
| 455 | *size -= result; |
| 456 | return true; |
| 457 | } |
| 458 | |
| 459 | bool FileStream::ReserveSize(size_t size) { |
| 460 | // TODO: extend the file to the proper length |
| 461 | return true; |
| 462 | } |
| 463 | |
| 464 | bool FileStream::GetSize(const std::string& filename, size_t* size) { |
| 465 | struct stat file_stats; |
| 466 | if (stat(filename.c_str(), &file_stats) != 0) |
| 467 | return false; |
| 468 | *size = file_stats.st_size; |
| 469 | return true; |
| 470 | } |
| 471 | |
| 472 | bool FileStream::Flush() { |
| 473 | if (file_) { |
| 474 | return (0 == fflush(file_)); |
| 475 | } |
| 476 | // try to flush empty file? |
| 477 | ASSERT(false); |
| 478 | return false; |
| 479 | } |
| 480 | |
| 481 | #if defined(WEBRTC_POSIX) && !defined(__native_client__) |
| 482 | |
| 483 | bool FileStream::TryLock() { |
| 484 | if (file_ == NULL) { |
| 485 | // Stream not open. |
| 486 | ASSERT(false); |
| 487 | return false; |
| 488 | } |
| 489 | |
| 490 | return flock(fileno(file_), LOCK_EX|LOCK_NB) == 0; |
| 491 | } |
| 492 | |
| 493 | bool FileStream::Unlock() { |
| 494 | if (file_ == NULL) { |
| 495 | // Stream not open. |
| 496 | ASSERT(false); |
| 497 | return false; |
| 498 | } |
| 499 | |
| 500 | return flock(fileno(file_), LOCK_UN) == 0; |
| 501 | } |
| 502 | |
| 503 | #endif |
| 504 | |
| 505 | void FileStream::DoClose() { |
| 506 | fclose(file_); |
| 507 | } |
| 508 | |
| 509 | CircularFileStream::CircularFileStream(size_t max_size) |
| 510 | : max_write_size_(max_size), |
| 511 | position_(0), |
| 512 | marked_position_(max_size / 2), |
| 513 | last_write_position_(0), |
| 514 | read_segment_(READ_LATEST), |
| 515 | read_segment_available_(0) { |
| 516 | } |
| 517 | |
| 518 | bool CircularFileStream::Open( |
| 519 | const std::string& filename, const char* mode, int* error) { |
| 520 | if (!FileStream::Open(filename.c_str(), mode, error)) |
| 521 | return false; |
| 522 | |
| 523 | if (strchr(mode, "r") != NULL) { // Opened in read mode. |
| 524 | // Check if the buffer has been overwritten and determine how to read the |
| 525 | // log in time sequence. |
| 526 | size_t file_size; |
| 527 | GetSize(&file_size); |
| 528 | if (file_size == position_) { |
| 529 | // The buffer has not been overwritten yet. Read 0 .. file_size |
| 530 | read_segment_ = READ_LATEST; |
| 531 | read_segment_available_ = file_size; |
| 532 | } else { |
| 533 | // The buffer has been over written. There are three segments: The first |
| 534 | // one is 0 .. marked_position_, which is the marked earliest log. The |
| 535 | // second one is position_ .. file_size, which is the middle log. The |
| 536 | // last one is marked_position_ .. position_, which is the latest log. |
| 537 | read_segment_ = READ_MARKED; |
| 538 | read_segment_available_ = marked_position_; |
| 539 | last_write_position_ = position_; |
| 540 | } |
| 541 | |
| 542 | // Read from the beginning. |
| 543 | position_ = 0; |
| 544 | SetPosition(position_); |
| 545 | } |
| 546 | |
| 547 | return true; |
| 548 | } |
| 549 | |
| 550 | StreamResult CircularFileStream::Read(void* buffer, size_t buffer_len, |
| 551 | size_t* read, int* error) { |
| 552 | if (read_segment_available_ == 0) { |
| 553 | size_t file_size; |
| 554 | switch (read_segment_) { |
| 555 | case READ_MARKED: // Finished READ_MARKED and start READ_MIDDLE. |
| 556 | read_segment_ = READ_MIDDLE; |
| 557 | position_ = last_write_position_; |
| 558 | SetPosition(position_); |
| 559 | GetSize(&file_size); |
| 560 | read_segment_available_ = file_size - position_; |
| 561 | break; |
| 562 | |
| 563 | case READ_MIDDLE: // Finished READ_MIDDLE and start READ_LATEST. |
| 564 | read_segment_ = READ_LATEST; |
| 565 | position_ = marked_position_; |
| 566 | SetPosition(position_); |
| 567 | read_segment_available_ = last_write_position_ - position_; |
| 568 | break; |
| 569 | |
| 570 | default: // Finished READ_LATEST and return EOS. |
| 571 | return rtc::SR_EOS; |
| 572 | } |
| 573 | } |
| 574 | |
| 575 | size_t local_read; |
| 576 | if (!read) read = &local_read; |
| 577 | |
| 578 | size_t to_read = rtc::_min(buffer_len, read_segment_available_); |
| 579 | rtc::StreamResult result |
| 580 | = rtc::FileStream::Read(buffer, to_read, read, error); |
| 581 | if (result == rtc::SR_SUCCESS) { |
| 582 | read_segment_available_ -= *read; |
| 583 | position_ += *read; |
| 584 | } |
| 585 | return result; |
| 586 | } |
| 587 | |
| 588 | StreamResult CircularFileStream::Write(const void* data, size_t data_len, |
| 589 | size_t* written, int* error) { |
| 590 | if (position_ >= max_write_size_) { |
| 591 | ASSERT(position_ == max_write_size_); |
| 592 | position_ = marked_position_; |
| 593 | SetPosition(position_); |
| 594 | } |
| 595 | |
| 596 | size_t local_written; |
| 597 | if (!written) written = &local_written; |
| 598 | |
| 599 | size_t to_eof = max_write_size_ - position_; |
| 600 | size_t to_write = rtc::_min(data_len, to_eof); |
| 601 | rtc::StreamResult result |
| 602 | = rtc::FileStream::Write(data, to_write, written, error); |
| 603 | if (result == rtc::SR_SUCCESS) { |
| 604 | position_ += *written; |
| 605 | } |
| 606 | return result; |
| 607 | } |
| 608 | |
| 609 | AsyncWriteStream::~AsyncWriteStream() { |
| 610 | write_thread_->Clear(this, 0, NULL); |
| 611 | ClearBufferAndWrite(); |
| 612 | |
| 613 | CritScope cs(&crit_stream_); |
| 614 | stream_.reset(); |
| 615 | } |
| 616 | |
| 617 | // This is needed by some stream writers, such as RtpDumpWriter. |
| 618 | bool AsyncWriteStream::GetPosition(size_t* position) const { |
| 619 | CritScope cs(&crit_stream_); |
| 620 | return stream_->GetPosition(position); |
| 621 | } |
| 622 | |
| 623 | // This is needed by some stream writers, such as the plugin log writers. |
| 624 | StreamResult AsyncWriteStream::Read(void* buffer, size_t buffer_len, |
| 625 | size_t* read, int* error) { |
| 626 | CritScope cs(&crit_stream_); |
| 627 | return stream_->Read(buffer, buffer_len, read, error); |
| 628 | } |
| 629 | |
| 630 | void AsyncWriteStream::Close() { |
| 631 | if (state_ == SS_CLOSED) { |
| 632 | return; |
| 633 | } |
| 634 | |
| 635 | write_thread_->Clear(this, 0, NULL); |
| 636 | ClearBufferAndWrite(); |
| 637 | |
| 638 | CritScope cs(&crit_stream_); |
| 639 | stream_->Close(); |
| 640 | state_ = SS_CLOSED; |
| 641 | } |
| 642 | |
| 643 | StreamResult AsyncWriteStream::Write(const void* data, size_t data_len, |
| 644 | size_t* written, int* error) { |
| 645 | if (state_ == SS_CLOSED) { |
| 646 | return SR_ERROR; |
| 647 | } |
| 648 | |
| 649 | size_t previous_buffer_length = 0; |
| 650 | { |
| 651 | CritScope cs(&crit_buffer_); |
| 652 | previous_buffer_length = buffer_.length(); |
| 653 | buffer_.AppendData(data, data_len); |
| 654 | } |
| 655 | |
| 656 | if (previous_buffer_length == 0) { |
| 657 | // If there's stuff already in the buffer, then we already called |
| 658 | // Post and the write_thread_ hasn't pulled it out yet, so we |
| 659 | // don't need to re-Post. |
| 660 | write_thread_->Post(this, 0, NULL); |
| 661 | } |
| 662 | // Return immediately, assuming that it works. |
| 663 | if (written) { |
| 664 | *written = data_len; |
| 665 | } |
| 666 | return SR_SUCCESS; |
| 667 | } |
| 668 | |
| 669 | void AsyncWriteStream::OnMessage(rtc::Message* pmsg) { |
| 670 | ClearBufferAndWrite(); |
| 671 | } |
| 672 | |
| 673 | bool AsyncWriteStream::Flush() { |
| 674 | if (state_ == SS_CLOSED) { |
| 675 | return false; |
| 676 | } |
| 677 | |
| 678 | ClearBufferAndWrite(); |
| 679 | |
| 680 | CritScope cs(&crit_stream_); |
| 681 | return stream_->Flush(); |
| 682 | } |
| 683 | |
| 684 | void AsyncWriteStream::ClearBufferAndWrite() { |
| 685 | Buffer to_write; |
| 686 | { |
| 687 | CritScope cs_buffer(&crit_buffer_); |
| 688 | buffer_.TransferTo(&to_write); |
| 689 | } |
| 690 | |
| 691 | if (to_write.length() > 0) { |
| 692 | CritScope cs(&crit_stream_); |
| 693 | stream_->WriteAll(to_write.data(), to_write.length(), NULL, NULL); |
| 694 | } |
| 695 | } |
| 696 | |
| 697 | #if defined(WEBRTC_POSIX) && !defined(__native_client__) |
| 698 | |
| 699 | // Have to identically rewrite the FileStream destructor or else it would call |
| 700 | // the base class's Close() instead of the sub-class's. |
| 701 | POpenStream::~POpenStream() { |
| 702 | POpenStream::Close(); |
| 703 | } |
| 704 | |
| 705 | bool POpenStream::Open(const std::string& subcommand, |
| 706 | const char* mode, |
| 707 | int* error) { |
| 708 | Close(); |
| 709 | file_ = popen(subcommand.c_str(), mode); |
| 710 | if (file_ == NULL) { |
| 711 | if (error) |
| 712 | *error = errno; |
| 713 | return false; |
| 714 | } |
| 715 | return true; |
| 716 | } |
| 717 | |
| 718 | bool POpenStream::OpenShare(const std::string& subcommand, const char* mode, |
| 719 | int shflag, int* error) { |
| 720 | return Open(subcommand, mode, error); |
| 721 | } |
| 722 | |
| 723 | void POpenStream::DoClose() { |
| 724 | wait_status_ = pclose(file_); |
| 725 | } |
| 726 | |
| 727 | #endif |
| 728 | |
| 729 | /////////////////////////////////////////////////////////////////////////////// |
| 730 | // MemoryStream |
| 731 | /////////////////////////////////////////////////////////////////////////////// |
| 732 | |
| 733 | MemoryStreamBase::MemoryStreamBase() |
| 734 | : buffer_(NULL), buffer_length_(0), data_length_(0), |
| 735 | seek_position_(0) { |
| 736 | } |
| 737 | |
| 738 | StreamState MemoryStreamBase::GetState() const { |
| 739 | return SS_OPEN; |
| 740 | } |
| 741 | |
| 742 | StreamResult MemoryStreamBase::Read(void* buffer, size_t bytes, |
| 743 | size_t* bytes_read, int* error) { |
| 744 | if (seek_position_ >= data_length_) { |
| 745 | return SR_EOS; |
| 746 | } |
| 747 | size_t available = data_length_ - seek_position_; |
| 748 | if (bytes > available) { |
| 749 | // Read partial buffer |
| 750 | bytes = available; |
| 751 | } |
| 752 | memcpy(buffer, &buffer_[seek_position_], bytes); |
| 753 | seek_position_ += bytes; |
| 754 | if (bytes_read) { |
| 755 | *bytes_read = bytes; |
| 756 | } |
| 757 | return SR_SUCCESS; |
| 758 | } |
| 759 | |
| 760 | StreamResult MemoryStreamBase::Write(const void* buffer, size_t bytes, |
| 761 | size_t* bytes_written, int* error) { |
| 762 | size_t available = buffer_length_ - seek_position_; |
| 763 | if (0 == available) { |
| 764 | // Increase buffer size to the larger of: |
| 765 | // a) new position rounded up to next 256 bytes |
| 766 | // b) double the previous length |
| 767 | size_t new_buffer_length = _max(((seek_position_ + bytes) | 0xFF) + 1, |
| 768 | buffer_length_ * 2); |
| 769 | StreamResult result = DoReserve(new_buffer_length, error); |
| 770 | if (SR_SUCCESS != result) { |
| 771 | return result; |
| 772 | } |
| 773 | ASSERT(buffer_length_ >= new_buffer_length); |
| 774 | available = buffer_length_ - seek_position_; |
| 775 | } |
| 776 | |
| 777 | if (bytes > available) { |
| 778 | bytes = available; |
| 779 | } |
| 780 | memcpy(&buffer_[seek_position_], buffer, bytes); |
| 781 | seek_position_ += bytes; |
| 782 | if (data_length_ < seek_position_) { |
| 783 | data_length_ = seek_position_; |
| 784 | } |
| 785 | if (bytes_written) { |
| 786 | *bytes_written = bytes; |
| 787 | } |
| 788 | return SR_SUCCESS; |
| 789 | } |
| 790 | |
| 791 | void MemoryStreamBase::Close() { |
| 792 | // nothing to do |
| 793 | } |
| 794 | |
| 795 | bool MemoryStreamBase::SetPosition(size_t position) { |
| 796 | if (position > data_length_) |
| 797 | return false; |
| 798 | seek_position_ = position; |
| 799 | return true; |
| 800 | } |
| 801 | |
| 802 | bool MemoryStreamBase::GetPosition(size_t* position) const { |
| 803 | if (position) |
| 804 | *position = seek_position_; |
| 805 | return true; |
| 806 | } |
| 807 | |
| 808 | bool MemoryStreamBase::GetSize(size_t* size) const { |
| 809 | if (size) |
| 810 | *size = data_length_; |
| 811 | return true; |
| 812 | } |
| 813 | |
| 814 | bool MemoryStreamBase::GetAvailable(size_t* size) const { |
| 815 | if (size) |
| 816 | *size = data_length_ - seek_position_; |
| 817 | return true; |
| 818 | } |
| 819 | |
| 820 | bool MemoryStreamBase::ReserveSize(size_t size) { |
| 821 | return (SR_SUCCESS == DoReserve(size, NULL)); |
| 822 | } |
| 823 | |
| 824 | StreamResult MemoryStreamBase::DoReserve(size_t size, int* error) { |
| 825 | return (buffer_length_ >= size) ? SR_SUCCESS : SR_EOS; |
| 826 | } |
| 827 | |
| 828 | /////////////////////////////////////////////////////////////////////////////// |
| 829 | |
| 830 | MemoryStream::MemoryStream() |
| 831 | : buffer_alloc_(NULL) { |
| 832 | } |
| 833 | |
| 834 | MemoryStream::MemoryStream(const char* data) |
| 835 | : buffer_alloc_(NULL) { |
| 836 | SetData(data, strlen(data)); |
| 837 | } |
| 838 | |
| 839 | MemoryStream::MemoryStream(const void* data, size_t length) |
| 840 | : buffer_alloc_(NULL) { |
| 841 | SetData(data, length); |
| 842 | } |
| 843 | |
| 844 | MemoryStream::~MemoryStream() { |
| 845 | delete [] buffer_alloc_; |
| 846 | } |
| 847 | |
| 848 | void MemoryStream::SetData(const void* data, size_t length) { |
| 849 | data_length_ = buffer_length_ = length; |
| 850 | delete [] buffer_alloc_; |
| 851 | buffer_alloc_ = new char[buffer_length_ + kAlignment]; |
| 852 | buffer_ = reinterpret_cast<char*>(ALIGNP(buffer_alloc_, kAlignment)); |
| 853 | memcpy(buffer_, data, data_length_); |
| 854 | seek_position_ = 0; |
| 855 | } |
| 856 | |
| 857 | StreamResult MemoryStream::DoReserve(size_t size, int* error) { |
| 858 | if (buffer_length_ >= size) |
| 859 | return SR_SUCCESS; |
| 860 | |
| 861 | if (char* new_buffer_alloc = new char[size + kAlignment]) { |
| 862 | char* new_buffer = reinterpret_cast<char*>( |
| 863 | ALIGNP(new_buffer_alloc, kAlignment)); |
| 864 | memcpy(new_buffer, buffer_, data_length_); |
| 865 | delete [] buffer_alloc_; |
| 866 | buffer_alloc_ = new_buffer_alloc; |
| 867 | buffer_ = new_buffer; |
| 868 | buffer_length_ = size; |
| 869 | return SR_SUCCESS; |
| 870 | } |
| 871 | |
| 872 | if (error) { |
| 873 | *error = ENOMEM; |
| 874 | } |
| 875 | return SR_ERROR; |
| 876 | } |
| 877 | |
| 878 | /////////////////////////////////////////////////////////////////////////////// |
| 879 | |
| 880 | ExternalMemoryStream::ExternalMemoryStream() { |
| 881 | } |
| 882 | |
| 883 | ExternalMemoryStream::ExternalMemoryStream(void* data, size_t length) { |
| 884 | SetData(data, length); |
| 885 | } |
| 886 | |
| 887 | ExternalMemoryStream::~ExternalMemoryStream() { |
| 888 | } |
| 889 | |
| 890 | void ExternalMemoryStream::SetData(void* data, size_t length) { |
| 891 | data_length_ = buffer_length_ = length; |
| 892 | buffer_ = static_cast<char*>(data); |
| 893 | seek_position_ = 0; |
| 894 | } |
| 895 | |
| 896 | /////////////////////////////////////////////////////////////////////////////// |
| 897 | // FifoBuffer |
| 898 | /////////////////////////////////////////////////////////////////////////////// |
| 899 | |
| 900 | FifoBuffer::FifoBuffer(size_t size) |
| 901 | : state_(SS_OPEN), buffer_(new char[size]), buffer_length_(size), |
| 902 | data_length_(0), read_position_(0), owner_(Thread::Current()) { |
| 903 | // all events are done on the owner_ thread |
| 904 | } |
| 905 | |
| 906 | FifoBuffer::FifoBuffer(size_t size, Thread* owner) |
| 907 | : state_(SS_OPEN), buffer_(new char[size]), buffer_length_(size), |
| 908 | data_length_(0), read_position_(0), owner_(owner) { |
| 909 | // all events are done on the owner_ thread |
| 910 | } |
| 911 | |
| 912 | FifoBuffer::~FifoBuffer() { |
| 913 | } |
| 914 | |
| 915 | bool FifoBuffer::GetBuffered(size_t* size) const { |
| 916 | CritScope cs(&crit_); |
| 917 | *size = data_length_; |
| 918 | return true; |
| 919 | } |
| 920 | |
| 921 | bool FifoBuffer::SetCapacity(size_t size) { |
| 922 | CritScope cs(&crit_); |
| 923 | if (data_length_ > size) { |
| 924 | return false; |
| 925 | } |
| 926 | |
| 927 | if (size != buffer_length_) { |
| 928 | char* buffer = new char[size]; |
| 929 | const size_t copy = data_length_; |
| 930 | const size_t tail_copy = _min(copy, buffer_length_ - read_position_); |
| 931 | memcpy(buffer, &buffer_[read_position_], tail_copy); |
| 932 | memcpy(buffer + tail_copy, &buffer_[0], copy - tail_copy); |
| 933 | buffer_.reset(buffer); |
| 934 | read_position_ = 0; |
| 935 | buffer_length_ = size; |
| 936 | } |
| 937 | return true; |
| 938 | } |
| 939 | |
| 940 | StreamResult FifoBuffer::ReadOffset(void* buffer, size_t bytes, |
| 941 | size_t offset, size_t* bytes_read) { |
| 942 | CritScope cs(&crit_); |
| 943 | return ReadOffsetLocked(buffer, bytes, offset, bytes_read); |
| 944 | } |
| 945 | |
| 946 | StreamResult FifoBuffer::WriteOffset(const void* buffer, size_t bytes, |
| 947 | size_t offset, size_t* bytes_written) { |
| 948 | CritScope cs(&crit_); |
| 949 | return WriteOffsetLocked(buffer, bytes, offset, bytes_written); |
| 950 | } |
| 951 | |
| 952 | StreamState FifoBuffer::GetState() const { |
| 953 | return state_; |
| 954 | } |
| 955 | |
| 956 | StreamResult FifoBuffer::Read(void* buffer, size_t bytes, |
| 957 | size_t* bytes_read, int* error) { |
| 958 | CritScope cs(&crit_); |
| 959 | const bool was_writable = data_length_ < buffer_length_; |
| 960 | size_t copy = 0; |
| 961 | StreamResult result = ReadOffsetLocked(buffer, bytes, 0, ©); |
| 962 | |
| 963 | if (result == SR_SUCCESS) { |
| 964 | // If read was successful then adjust the read position and number of |
| 965 | // bytes buffered. |
| 966 | read_position_ = (read_position_ + copy) % buffer_length_; |
| 967 | data_length_ -= copy; |
| 968 | if (bytes_read) { |
| 969 | *bytes_read = copy; |
| 970 | } |
| 971 | |
| 972 | // if we were full before, and now we're not, post an event |
| 973 | if (!was_writable && copy > 0) { |
| 974 | PostEvent(owner_, SE_WRITE, 0); |
| 975 | } |
| 976 | } |
| 977 | return result; |
| 978 | } |
| 979 | |
| 980 | StreamResult FifoBuffer::Write(const void* buffer, size_t bytes, |
| 981 | size_t* bytes_written, int* error) { |
| 982 | CritScope cs(&crit_); |
| 983 | |
| 984 | const bool was_readable = (data_length_ > 0); |
| 985 | size_t copy = 0; |
| 986 | StreamResult result = WriteOffsetLocked(buffer, bytes, 0, ©); |
| 987 | |
| 988 | if (result == SR_SUCCESS) { |
| 989 | // If write was successful then adjust the number of readable bytes. |
| 990 | data_length_ += copy; |
| 991 | if (bytes_written) { |
| 992 | *bytes_written = copy; |
| 993 | } |
| 994 | |
| 995 | // if we didn't have any data to read before, and now we do, post an event |
| 996 | if (!was_readable && copy > 0) { |
| 997 | PostEvent(owner_, SE_READ, 0); |
| 998 | } |
| 999 | } |
| 1000 | return result; |
| 1001 | } |
| 1002 | |
| 1003 | void FifoBuffer::Close() { |
| 1004 | CritScope cs(&crit_); |
| 1005 | state_ = SS_CLOSED; |
| 1006 | } |
| 1007 | |
| 1008 | const void* FifoBuffer::GetReadData(size_t* size) { |
| 1009 | CritScope cs(&crit_); |
| 1010 | *size = (read_position_ + data_length_ <= buffer_length_) ? |
| 1011 | data_length_ : buffer_length_ - read_position_; |
| 1012 | return &buffer_[read_position_]; |
| 1013 | } |
| 1014 | |
| 1015 | void FifoBuffer::ConsumeReadData(size_t size) { |
| 1016 | CritScope cs(&crit_); |
| 1017 | ASSERT(size <= data_length_); |
| 1018 | const bool was_writable = data_length_ < buffer_length_; |
| 1019 | read_position_ = (read_position_ + size) % buffer_length_; |
| 1020 | data_length_ -= size; |
| 1021 | if (!was_writable && size > 0) { |
| 1022 | PostEvent(owner_, SE_WRITE, 0); |
| 1023 | } |
| 1024 | } |
| 1025 | |
| 1026 | void* FifoBuffer::GetWriteBuffer(size_t* size) { |
| 1027 | CritScope cs(&crit_); |
| 1028 | if (state_ == SS_CLOSED) { |
| 1029 | return NULL; |
| 1030 | } |
| 1031 | |
| 1032 | // if empty, reset the write position to the beginning, so we can get |
| 1033 | // the biggest possible block |
| 1034 | if (data_length_ == 0) { |
| 1035 | read_position_ = 0; |
| 1036 | } |
| 1037 | |
| 1038 | const size_t write_position = (read_position_ + data_length_) |
| 1039 | % buffer_length_; |
| 1040 | *size = (write_position > read_position_ || data_length_ == 0) ? |
| 1041 | buffer_length_ - write_position : read_position_ - write_position; |
| 1042 | return &buffer_[write_position]; |
| 1043 | } |
| 1044 | |
| 1045 | void FifoBuffer::ConsumeWriteBuffer(size_t size) { |
| 1046 | CritScope cs(&crit_); |
| 1047 | ASSERT(size <= buffer_length_ - data_length_); |
| 1048 | const bool was_readable = (data_length_ > 0); |
| 1049 | data_length_ += size; |
| 1050 | if (!was_readable && size > 0) { |
| 1051 | PostEvent(owner_, SE_READ, 0); |
| 1052 | } |
| 1053 | } |
| 1054 | |
| 1055 | bool FifoBuffer::GetWriteRemaining(size_t* size) const { |
| 1056 | CritScope cs(&crit_); |
| 1057 | *size = buffer_length_ - data_length_; |
| 1058 | return true; |
| 1059 | } |
| 1060 | |
| 1061 | StreamResult FifoBuffer::ReadOffsetLocked(void* buffer, |
| 1062 | size_t bytes, |
| 1063 | size_t offset, |
| 1064 | size_t* bytes_read) { |
| 1065 | if (offset >= data_length_) { |
| 1066 | return (state_ != SS_CLOSED) ? SR_BLOCK : SR_EOS; |
| 1067 | } |
| 1068 | |
| 1069 | const size_t available = data_length_ - offset; |
| 1070 | const size_t read_position = (read_position_ + offset) % buffer_length_; |
| 1071 | const size_t copy = _min(bytes, available); |
| 1072 | const size_t tail_copy = _min(copy, buffer_length_ - read_position); |
| 1073 | char* const p = static_cast<char*>(buffer); |
| 1074 | memcpy(p, &buffer_[read_position], tail_copy); |
| 1075 | memcpy(p + tail_copy, &buffer_[0], copy - tail_copy); |
| 1076 | |
| 1077 | if (bytes_read) { |
| 1078 | *bytes_read = copy; |
| 1079 | } |
| 1080 | return SR_SUCCESS; |
| 1081 | } |
| 1082 | |
| 1083 | StreamResult FifoBuffer::WriteOffsetLocked(const void* buffer, |
| 1084 | size_t bytes, |
| 1085 | size_t offset, |
| 1086 | size_t* bytes_written) { |
| 1087 | if (state_ == SS_CLOSED) { |
| 1088 | return SR_EOS; |
| 1089 | } |
| 1090 | |
| 1091 | if (data_length_ + offset >= buffer_length_) { |
| 1092 | return SR_BLOCK; |
| 1093 | } |
| 1094 | |
| 1095 | const size_t available = buffer_length_ - data_length_ - offset; |
| 1096 | const size_t write_position = (read_position_ + data_length_ + offset) |
| 1097 | % buffer_length_; |
| 1098 | const size_t copy = _min(bytes, available); |
| 1099 | const size_t tail_copy = _min(copy, buffer_length_ - write_position); |
| 1100 | const char* const p = static_cast<const char*>(buffer); |
| 1101 | memcpy(&buffer_[write_position], p, tail_copy); |
| 1102 | memcpy(&buffer_[0], p + tail_copy, copy - tail_copy); |
| 1103 | |
| 1104 | if (bytes_written) { |
| 1105 | *bytes_written = copy; |
| 1106 | } |
| 1107 | return SR_SUCCESS; |
| 1108 | } |
| 1109 | |
| 1110 | |
| 1111 | |
| 1112 | /////////////////////////////////////////////////////////////////////////////// |
| 1113 | // LoggingAdapter |
| 1114 | /////////////////////////////////////////////////////////////////////////////// |
| 1115 | |
| 1116 | LoggingAdapter::LoggingAdapter(StreamInterface* stream, LoggingSeverity level, |
| 1117 | const std::string& label, bool hex_mode) |
| 1118 | : StreamAdapterInterface(stream), level_(level), hex_mode_(hex_mode) { |
| 1119 | set_label(label); |
| 1120 | } |
| 1121 | |
| 1122 | void LoggingAdapter::set_label(const std::string& label) { |
| 1123 | label_.assign("["); |
| 1124 | label_.append(label); |
| 1125 | label_.append("]"); |
| 1126 | } |
| 1127 | |
| 1128 | StreamResult LoggingAdapter::Read(void* buffer, size_t buffer_len, |
| 1129 | size_t* read, int* error) { |
| 1130 | size_t local_read; if (!read) read = &local_read; |
| 1131 | StreamResult result = StreamAdapterInterface::Read(buffer, buffer_len, read, |
| 1132 | error); |
| 1133 | if (result == SR_SUCCESS) { |
| 1134 | LogMultiline(level_, label_.c_str(), true, buffer, *read, hex_mode_, &lms_); |
| 1135 | } |
| 1136 | return result; |
| 1137 | } |
| 1138 | |
| 1139 | StreamResult LoggingAdapter::Write(const void* data, size_t data_len, |
| 1140 | size_t* written, int* error) { |
| 1141 | size_t local_written; |
| 1142 | if (!written) written = &local_written; |
| 1143 | StreamResult result = StreamAdapterInterface::Write(data, data_len, written, |
| 1144 | error); |
| 1145 | if (result == SR_SUCCESS) { |
| 1146 | LogMultiline(level_, label_.c_str(), false, data, *written, hex_mode_, |
| 1147 | &lms_); |
| 1148 | } |
| 1149 | return result; |
| 1150 | } |
| 1151 | |
| 1152 | void LoggingAdapter::Close() { |
| 1153 | LogMultiline(level_, label_.c_str(), false, NULL, 0, hex_mode_, &lms_); |
| 1154 | LogMultiline(level_, label_.c_str(), true, NULL, 0, hex_mode_, &lms_); |
| 1155 | LOG_V(level_) << label_ << " Closed locally"; |
| 1156 | StreamAdapterInterface::Close(); |
| 1157 | } |
| 1158 | |
| 1159 | void LoggingAdapter::OnEvent(StreamInterface* stream, int events, int err) { |
| 1160 | if (events & SE_OPEN) { |
| 1161 | LOG_V(level_) << label_ << " Open"; |
| 1162 | } else if (events & SE_CLOSE) { |
| 1163 | LogMultiline(level_, label_.c_str(), false, NULL, 0, hex_mode_, &lms_); |
| 1164 | LogMultiline(level_, label_.c_str(), true, NULL, 0, hex_mode_, &lms_); |
| 1165 | LOG_V(level_) << label_ << " Closed with error: " << err; |
| 1166 | } |
| 1167 | StreamAdapterInterface::OnEvent(stream, events, err); |
| 1168 | } |
| 1169 | |
| 1170 | /////////////////////////////////////////////////////////////////////////////// |
| 1171 | // StringStream - Reads/Writes to an external std::string |
| 1172 | /////////////////////////////////////////////////////////////////////////////// |
| 1173 | |
| 1174 | StringStream::StringStream(std::string& str) |
| 1175 | : str_(str), read_pos_(0), read_only_(false) { |
| 1176 | } |
| 1177 | |
| 1178 | StringStream::StringStream(const std::string& str) |
| 1179 | : str_(const_cast<std::string&>(str)), read_pos_(0), read_only_(true) { |
| 1180 | } |
| 1181 | |
| 1182 | StreamState StringStream::GetState() const { |
| 1183 | return SS_OPEN; |
| 1184 | } |
| 1185 | |
| 1186 | StreamResult StringStream::Read(void* buffer, size_t buffer_len, |
| 1187 | size_t* read, int* error) { |
| 1188 | size_t available = _min(buffer_len, str_.size() - read_pos_); |
| 1189 | if (!available) |
| 1190 | return SR_EOS; |
| 1191 | memcpy(buffer, str_.data() + read_pos_, available); |
| 1192 | read_pos_ += available; |
| 1193 | if (read) |
| 1194 | *read = available; |
| 1195 | return SR_SUCCESS; |
| 1196 | } |
| 1197 | |
| 1198 | StreamResult StringStream::Write(const void* data, size_t data_len, |
| 1199 | size_t* written, int* error) { |
| 1200 | if (read_only_) { |
| 1201 | if (error) { |
| 1202 | *error = -1; |
| 1203 | } |
| 1204 | return SR_ERROR; |
| 1205 | } |
| 1206 | str_.append(static_cast<const char*>(data), |
| 1207 | static_cast<const char*>(data) + data_len); |
| 1208 | if (written) |
| 1209 | *written = data_len; |
| 1210 | return SR_SUCCESS; |
| 1211 | } |
| 1212 | |
| 1213 | void StringStream::Close() { |
| 1214 | } |
| 1215 | |
| 1216 | bool StringStream::SetPosition(size_t position) { |
| 1217 | if (position > str_.size()) |
| 1218 | return false; |
| 1219 | read_pos_ = position; |
| 1220 | return true; |
| 1221 | } |
| 1222 | |
| 1223 | bool StringStream::GetPosition(size_t* position) const { |
| 1224 | if (position) |
| 1225 | *position = read_pos_; |
| 1226 | return true; |
| 1227 | } |
| 1228 | |
| 1229 | bool StringStream::GetSize(size_t* size) const { |
| 1230 | if (size) |
| 1231 | *size = str_.size(); |
| 1232 | return true; |
| 1233 | } |
| 1234 | |
| 1235 | bool StringStream::GetAvailable(size_t* size) const { |
| 1236 | if (size) |
| 1237 | *size = str_.size() - read_pos_; |
| 1238 | return true; |
| 1239 | } |
| 1240 | |
| 1241 | bool StringStream::ReserveSize(size_t size) { |
| 1242 | if (read_only_) |
| 1243 | return false; |
| 1244 | str_.reserve(size); |
| 1245 | return true; |
| 1246 | } |
| 1247 | |
| 1248 | /////////////////////////////////////////////////////////////////////////////// |
| 1249 | // StreamReference |
| 1250 | /////////////////////////////////////////////////////////////////////////////// |
| 1251 | |
| 1252 | StreamReference::StreamReference(StreamInterface* stream) |
| 1253 | : StreamAdapterInterface(stream, false) { |
| 1254 | // owner set to false so the destructor does not free the stream. |
| 1255 | stream_ref_count_ = new StreamRefCount(stream); |
| 1256 | } |
| 1257 | |
| 1258 | StreamInterface* StreamReference::NewReference() { |
| 1259 | stream_ref_count_->AddReference(); |
| 1260 | return new StreamReference(stream_ref_count_, stream()); |
| 1261 | } |
| 1262 | |
| 1263 | StreamReference::~StreamReference() { |
| 1264 | stream_ref_count_->Release(); |
| 1265 | } |
| 1266 | |
| 1267 | StreamReference::StreamReference(StreamRefCount* stream_ref_count, |
| 1268 | StreamInterface* stream) |
| 1269 | : StreamAdapterInterface(stream, false), |
| 1270 | stream_ref_count_(stream_ref_count) { |
| 1271 | } |
| 1272 | |
| 1273 | /////////////////////////////////////////////////////////////////////////////// |
| 1274 | |
| 1275 | StreamResult Flow(StreamInterface* source, |
| 1276 | char* buffer, size_t buffer_len, |
| 1277 | StreamInterface* sink, |
| 1278 | size_t* data_len /* = NULL */) { |
| 1279 | ASSERT(buffer_len > 0); |
| 1280 | |
| 1281 | StreamResult result; |
| 1282 | size_t count, read_pos, write_pos; |
| 1283 | if (data_len) { |
| 1284 | read_pos = *data_len; |
| 1285 | } else { |
| 1286 | read_pos = 0; |
| 1287 | } |
| 1288 | |
| 1289 | bool end_of_stream = false; |
| 1290 | do { |
| 1291 | // Read until buffer is full, end of stream, or error |
| 1292 | while (!end_of_stream && (read_pos < buffer_len)) { |
| 1293 | result = source->Read(buffer + read_pos, buffer_len - read_pos, |
| 1294 | &count, NULL); |
| 1295 | if (result == SR_EOS) { |
| 1296 | end_of_stream = true; |
| 1297 | } else if (result != SR_SUCCESS) { |
| 1298 | if (data_len) { |
| 1299 | *data_len = read_pos; |
| 1300 | } |
| 1301 | return result; |
| 1302 | } else { |
| 1303 | read_pos += count; |
| 1304 | } |
| 1305 | } |
| 1306 | |
| 1307 | // Write until buffer is empty, or error (including end of stream) |
| 1308 | write_pos = 0; |
| 1309 | while (write_pos < read_pos) { |
| 1310 | result = sink->Write(buffer + write_pos, read_pos - write_pos, |
| 1311 | &count, NULL); |
| 1312 | if (result != SR_SUCCESS) { |
| 1313 | if (data_len) { |
| 1314 | *data_len = read_pos - write_pos; |
| 1315 | if (write_pos > 0) { |
| 1316 | memmove(buffer, buffer + write_pos, *data_len); |
| 1317 | } |
| 1318 | } |
| 1319 | return result; |
| 1320 | } |
| 1321 | write_pos += count; |
| 1322 | } |
| 1323 | |
| 1324 | read_pos = 0; |
| 1325 | } while (!end_of_stream); |
| 1326 | |
| 1327 | if (data_len) { |
| 1328 | *data_len = 0; |
| 1329 | } |
| 1330 | return SR_SUCCESS; |
| 1331 | } |
| 1332 | |
| 1333 | /////////////////////////////////////////////////////////////////////////////// |
| 1334 | |
| 1335 | } // namespace rtc |