Make recordio simple

CMakeLists.txt

@@ -145,6 +145,7 @@ include(external/pybind11)  # download pybind11
 include(external/cares)
 include(external/grpc)
 include(external/snappy)    # download snappy
+include(external/snappystream)
 
 include(cudnn)              # set cudnn libraries, must before configure
 include(cupti)

cmake/external/snappystream.cmake

+# Copyright (c) 2018 PaddlePaddle Authors. All Rights Reserved.
+#
+# 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.
+#
+
+IF(MOBILE_INFERENCE)
+    return()
+ENDIF()
+
+include (ExternalProject)
+
+# NOTE: snappy is needed when linking with recordio
+
+SET(SNAPPYSTREAM_SOURCES_DIR ${THIRD_PARTY_PATH}/snappy_stream)
+SET(SNAPPYSTREAM_INSTALL_DIR ${THIRD_PARTY_PATH}/install/snappy_stream)
+SET(SNAPPYSTREAM_INCLUDE_DIR "${SNAPPYSTREAM_INSTALL_DIR}/include/" CACHE PATH "snappy stream include directory." FORCE)
+
+ExternalProject_Add(
+        extern_snappystream
+        GIT_REPOSITORY "https://github.com/hoxnox/snappystream.git"
+        GIT_TAG "0.2.8"
+        PREFIX          ${SNAPPYSTREAM_SOURCES_DIR}
+        UPDATE_COMMAND  ""
+        CMAKE_ARGS      -DCMAKE_CXX_COMPILER=${CMAKE_CXX_COMPILER}
+                        -DCMAKE_C_COMPILER=${CMAKE_C_COMPILER}
+                        -DCMAKE_CXX_FLAGS=${CMAKE_CXX_FLAGS}
+                        -DCMAKE_C_FLAGS=${CMAKE_C_FLAGS}
+                        -DCMAKE_INSTALL_PREFIX=${SNAPPY_INSTALL_DIR}
+                        -DCMAKE_INSTALL_LIBDIR=${SNAPPY_INSTALL_DIR}/lib
+                        -DCMAKE_POSITION_INDEPENDENT_CODE=ON
+                        -DCMAKE_BUILD_TYPE=${THIRD_PARTY_BUILD_TYPE}
+                        -DSNAPPY_ROOT=${SNAPPY_INSTALL_DIR}
+                        ${EXTERNAL_OPTIONAL_ARGS}
+                        CMAKE_CACHE_ARGS
+                        -DCMAKE_INSTALL_PREFIX:PATH=${SNAPPYSTREAM_INSTALL_DIR}
+                        -DCMAKE_INSTALL_LIBDIR:PATH=${SNAPPYSTREAM_INSTALL_DIR}/lib
+                        -DCMAKE_BUILD_TYPE:STRING=${THIRD_PARTY_BUILD_TYPE}
+        BUILD_COMMAND   make -j8
+        INSTALL_COMMAND make install
+        DEPENDS snappy
+)
+
+add_library(snappystream STATIC IMPORTED GLOBAL)
+set_property(TARGET snappystream PROPERTY IMPORTED_LOCATION
+        "${SNAPPYSTREAM_INSTALL_DIR}/lib/libsnappystream.a")
+
+include_directories(${SNAPPYSTREAM_INCLUDE_DIR})
+add_dependencies(snappystream extern_snappystream)

paddle/fluid/recordio/CMakeLists.txt

 # internal library.
-cc_library(io SRCS io.cc DEPS stringpiece)
-cc_test(io_test SRCS io_test.cc DEPS io)
-cc_library(header SRCS header.cc DEPS io)
+cc_library(header SRCS header.cc)
 cc_test(header_test SRCS header_test.cc DEPS header)
-cc_library(chunk SRCS chunk.cc DEPS snappy)
+cc_library(chunk SRCS chunk.cc DEPS snappystream snappy header zlib)
 cc_test(chunk_test SRCS chunk_test.cc DEPS chunk)
-cc_library(range_scanner SRCS range_scanner.cc DEPS io chunk)
-cc_test(range_scanner_test SRCS range_scanner_test.cc DEPS range_scanner)
-cc_library(scanner SRCS scanner.cc DEPS range_scanner)
-cc_test(scanner_test SRCS scanner_test.cc DEPS scanner)
-# exported library.
-cc_library(recordio SRCS recordio.cc DEPS scanner chunk header)
-cc_test(recordio_test SRCS recordio_test.cc DEPS scanner)
+cc_library(recordio DEPS chunk header)

paddle/fluid/recordio/chunk.cc

@@ -14,97 +14,119 @@
 
 #include "paddle/fluid/recordio/chunk.h"
 
-#include <cstring>
+#include <memory>
 #include <sstream>
-#include <utility>
-
-#include "snappy.h"
-
-#include "paddle/fluid/recordio/crc32.h"
+#include "paddle/fluid/platform/enforce.h"
+#include "snappystream.hpp"
+#include "zlib.h"
 
 namespace paddle {
 namespace recordio {
+constexpr size_t kMaxBufSize = 1024;
+
+template <typename Callback>
+static void ReadStreamByBuf(std::istream& in, int limit, Callback callback) {
+  char buf[kMaxBufSize];
+  std::streamsize actual_size;
+  size_t counter = 0;
+  do {
+    auto actual_max =
+        limit > 0 ? std::min(limit - counter, kMaxBufSize) : kMaxBufSize;
+    actual_size = in.readsome(buf, actual_max);
+    if (actual_size == 0) {
+      break;
+    }
+    callback(buf, actual_size);
+    if (limit > 0) {
+      counter += actual_size;
+    }
+  } while (actual_size == kMaxBufSize);
+}
 
-void Chunk::Add(const char* record, size_t length) {
-  records_.emplace_after(std::string(record, length));
-  num_bytes_ += s.size() * sizeof(char);
+static void PipeStream(std::istream& in, std::ostream& os) {
+  ReadStreamByBuf(
+      in, -1, [&os](const char* buf, size_t len) { os.write(buf, len); });
+}
+static uint32_t Crc32Stream(std::istream& in, int limit = -1) {
+  auto crc = crc32(0, nullptr, 0);
+  ReadStreamByBuf(in, limit, [&crc](const char* buf, size_t len) {
+    crc = crc32(crc, reinterpret_cast<const Bytef*>(buf), len);
+  });
+  return crc;
 }
 
-bool Chunk::Dump(Stream* fo, Compressor ct) {
+bool Chunk::Write(std::ostream& os, Compressor ct) const {
   // NOTE(dzhwinter): don't check records.numBytes instead, because
   // empty records are allowed.
-  if (records_.size() == 0) return false;
+  if (records_.empty()) {
+    return false;
+  }
+  std::stringstream sout;
+  std::unique_ptr<std::ostream> compressed_stream;
+  switch (ct) {
+    case Compressor::kNoCompress:
+      break;
+    case Compressor::kSnappy:
+      compressed_stream.reset(new snappy::oSnappyStream(sout));
+      break;
+    default:
+      PADDLE_THROW("Not implemented");
+  }
+
+  std::ostream& buf_stream = compressed_stream ? *compressed_stream : sout;
 
-  // pack the record into consecutive memory for compress
-  std::ostringstream os;
   for (auto& record : records_) {
-    os.write(record.size(), sizeof(size_t));
-    os.write(record.data(), static_cast<std::streamsize>(record.size()));
+    size_t sz = record.size();
+    buf_stream.write(reinterpret_cast<const char*>(&sz), sizeof(uint32_t))
+        .write(record.data(), record.size());
+  }
+
+  if (compressed_stream) {
+    compressed_stream.reset();
   }
 
-  std::unique_ptr<char[]> buffer(new char[num_bytes_]);
-  size_t compressed =
-      CompressData(os.str().c_str(), num_bytes_, ct, buffer.get());
-  uint32_t checksum = Crc32(buffer.get(), compressed);
-  Header hdr(records_.size(), checksum, ct, static_cast<uint32_t>(compressed));
-  hdr.Write(fo);
-  fo.Write(buffer.get(), compressed);
-  // clear the content
-  records_.clear();
-  num_bytes_ = 0;
+  auto end_pos = sout.tellg();
+  sout.seekg(0, std::ios::beg);
+  uint32_t len = static_cast<uint32_t>(end_pos - sout.tellg());
+  uint32_t crc = Crc32Stream(sout);
+  sout.seekg(0, std::ios::beg);
+
+  Header hdr(static_cast<uint32_t>(records_.size()), crc, ct, len);
+  hdr.Write(os);
+  PipeStream(sout, os);
   return true;
 }
 
-void Chunk::Parse(Stream* fi, size_t offset) {
-  fi->Seek(offset);
+void Chunk::Parse(std::istream& sin) {
   Header hdr;
-  hdr.Parse(fi);
-
-  size_t size = static_cast<size_t>(hdr.CompressSize());
-  std::unique_ptr<char[]> buffer(new char[size]);
-  fi->Read(buffer.get(), size);
-  size_t deflated_size = 0;
-  snappy::GetUncompressedLength(buffer.get(), size, &deflated_size);
-  std::unique_ptr<char[]> deflated_buffer(new char[deflated_size]);
-  DeflateData(buffer.get(), size, hdr.CompressType(), deflated_buffer.get());
-  std::istringstream deflated(
-      std::string(deflated_buffer.get(), deflated_size));
-  for (size_t i = 0; i < hdr.NumRecords(); ++i) {
-    size_t rs;
-    deflated.read(&rs, sizeof(size_t));
-    std::string record(rs, '\0');
-    deflated.read(&record[0], rs);
-    records_.emplace_back(record);
-    num_bytes_ += record.size();
-  }
-}
+  hdr.Parse(sin);
+  auto beg_pos = sin.tellg();
+  auto crc = Crc32Stream(sin, hdr.CompressSize());
+  PADDLE_ENFORCE_EQ(hdr.Checksum(), crc);
 
-size_t CompressData(const char* in,
-                    size_t in_length,
-                    Compressor ct,
-                    char* out) {
-  size_t compressd_size = 0;
-  switch (ct) {
+  Clear();
+
+  sin.seekg(beg_pos, std::ios::beg);
+  std::unique_ptr<std::istream> compressed_stream;
+  switch (hdr.CompressType()) {
     case Compressor::kNoCompress:
-      // do nothing
-      memcpy(out, in, in_length);
-      compressd_size = in_length;
       break;
     case Compressor::kSnappy:
-      snappy::RawCompress(in, in_length, out, &compressd_size);
+      compressed_stream.reset(new snappy::iSnappyStream(sin));
       break;
+    default:
+      PADDLE_THROW("Not implemented");
   }
-  return compressd_size;
-}
 
-void DeflateData(const char* in, size_t in_length, Compressor ct, char* out) {
-  switch (c) {
-    case Compressor::kNoCompress:
-      memcpy(out, in, in_length);
-      break;
-    case Compressor::kSnappy:
-      snappy::RawUncompress(in, in_length, out);
-      break;
+  std::istream& stream = compressed_stream ? *compressed_stream : sin;
+
+  for (uint32_t i = 0; i < hdr.NumRecords(); ++i) {
+    uint32_t rec_len;
+    stream.read(reinterpret_cast<char*>(&rec_len), sizeof(uint32_t));
+    std::string buf;
+    buf.resize(rec_len);
+    stream.read(&buf[0], rec_len);
+    Add(buf);
   }
 }
 

paddle/fluid/recordio/chunk.h

@@ -13,11 +13,11 @@
 // limitations under the License.
 
 #pragma once
-#include <forward_list>
 #include <string>
+#include <vector>
 
+#include "paddle/fluid/platform/macros.h"
 #include "paddle/fluid/recordio/header.h"
-#include "paddle/fluid/recordio/io.h"
 
 namespace paddle {
 namespace recordio {
@@ -26,16 +26,23 @@ namespace recordio {
 class Chunk {
 public:
   Chunk() : num_bytes_(0) {}
-  void Add(const char* record, size_t size);
+  void Add(std::string buf) {
+    records_.push_back(buf);
+    num_bytes_ += buf.size();
+  }
   // dump the chunk into w, and clears the chunk and makes it ready for
   // the next add invocation.
-  bool Dump(Stream* fo, Compressor ct);
-  void Parse(Stream* fi, size_t offset);
+  bool Write(std::ostream& fo, Compressor ct) const;
+  void Clear() {
+    records_.clear();
+    num_bytes_ = 0;
+  }
+  void Parse(std::istream& sin);
   size_t NumBytes() { return num_bytes_; }
-  const std::string Record(int i) { return records_[i]; }
+  const std::string& Record(int i) const { return records_[i]; }
 
 private:
-  std::forward_list<const std::string> records_;
+  std::vector<std::string> records_;
   // sum of record lengths in bytes.
   size_t num_bytes_;
   DISABLE_COPY_AND_ASSIGN(Chunk);

paddle/fluid/recordio/chunk_test.cc

@@ -22,34 +22,28 @@ using namespace paddle::recordio;
 
 TEST(Chunk, SaveLoad) {
   Chunk ch;
-  ch.Add("12345", 6);
-  ch.Add("123", 4);
-  {
-    Stream* fs = Stream::Open("/tmp/record_11", "w");
-    ch.Dump(fs, Compressor::kNoCompress);
-    EXPECT_EQ(ch.NumBytes(), 0);
-  }
-  {
-    Stream* fs = Stream::Open("/tmp/record_11", "r");
-    ch.Parse(fs, 0);
-    EXPECT_EQ(ch.NumBytes(), 10);
-  }
+  ch.Add(std::string("12345", 6));
+  ch.Add(std::string("123", 4));
+  std::stringstream ss;
+  ch.Write(ss, Compressor::kNoCompress);
+  ch.Clear();
+  ch.Parse(ss);
+  ASSERT_EQ(ch.NumBytes(), 10U);
 }
 
 TEST(Chunk, Compressor) {
   Chunk ch;
-  ch.Add("12345", 6);
-  ch.Add("123", 4);
-  ch.Add("123", 4);
-  ch.Add("123", 4);
-  {
-    Stream* fs = Stream::Open("/tmp/record_12", "w");
-    ch.Dump(fs, Compressor::kSnappy);
-    EXPECT_EQ(ch.NumBytes(), 0);
-  }
-  {
-    Stream* fs = Stream::Open("/tmp/record_12", "r");
-    ch.Parse(fs, 0);
-    EXPECT_EQ(ch.NumBytes(), 10);
-  }
+  ch.Add(std::string("12345", 6));
+  ch.Add(std::string("123", 4));
+  ch.Add(std::string("123", 4));
+  ch.Add(std::string("123", 4));
+  std::stringstream ss;
+  ch.Write(ss, Compressor::kSnappy);
+  std::stringstream ss2;
+  ch.Write(ss2, Compressor::kNoCompress);
+  ASSERT_LE(ss.tellp(), ss2.tellp());  // Compress should contain less data;
+
+  ch.Clear();
+  ch.Parse(ss);
+  ASSERT_EQ(ch.NumBytes(), 18);
 }

paddle/fluid/recordio/crc32.h

-//   Copyright (c) 2018 PaddlePaddle Authors. All Rights Reserved.
-//
-// 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.
-
-// A wrapper on crc library https://github.com/d-bahr/CRCpp
-#include <cstdint>
-
-#include "paddle/fluid/recordio/detail/crc.h"
-
-namespace paddle {
-namespace recordio {
-
-// usage
-// char data[] = "hello,world";
-// crc = Crc32(data, 12);
-// Assert_EQ(crc, 68a85159);
-
-uint32_t Crc32(const char* data, size_t size) {
-  return CRC::Calculate(data, size, CRC::CRC_32())
-}
-
-}  // namespace recordio
-}  // namespace paddle

paddle/fluid/recordio/header.cc

@@ -26,18 +26,18 @@ Header::Header()
 Header::Header(uint32_t num, uint32_t sum, Compressor c, uint32_t cs)
     : num_records_(num), checksum_(sum), compressor_(c), compress_size_(cs) {}
 
-void Header::Parse(Stream* iss) {
-  iss->Read(reinterpret_cast<char*>(&num_records_), sizeof(uint32_t));
-  iss->Read(reinterpret_cast<char*>(&checksum_), sizeof(uint32_t));
-  iss->Read(reinterpret_cast<char*>(&compressor_), sizeof(uint32_t));
-  iss->Read(reinterpret_cast<char*>(&compress_size_), sizeof(uint32_t));
+void Header::Parse(std::istream& is) {
+  is.read(reinterpret_cast<char*>(&num_records_), sizeof(uint32_t))
+      .read(reinterpret_cast<char*>(&checksum_), sizeof(uint32_t))
+      .read(reinterpret_cast<char*>(&compressor_), sizeof(uint32_t))
+      .read(reinterpret_cast<char*>(&compress_size_), sizeof(uint32_t));
 }
 
-void Header::Write(Stream* os) {
-  os->Write(reinterpret_cast<char*>(&num_records_), sizeof(uint32_t));
-  os->Write(reinterpret_cast<char*>(&checksum_), sizeof(uint32_t));
-  os->Write(reinterpret_cast<char*>(&compressor_), sizeof(uint32_t));
-  os->Write(reinterpret_cast<char*>(&compress_size_), sizeof(uint32_t));
+void Header::Write(std::ostream& os) const {
+  os.write(reinterpret_cast<const char*>(&num_records_), sizeof(uint32_t))
+      .write(reinterpret_cast<const char*>(&checksum_), sizeof(uint32_t))
+      .write(reinterpret_cast<const char*>(&compressor_), sizeof(uint32_t))
+      .write(reinterpret_cast<const char*>(&compress_size_), sizeof(uint32_t));
 }
 
 std::ostream& operator<<(std::ostream& os, Header h) {

paddle/fluid/recordio/header.h

@@ -16,8 +16,6 @@
 
 #include <sstream>
 
-#include "paddle/fluid/recordio/io.h"
-
 namespace paddle {
 namespace recordio {
 
@@ -26,7 +24,7 @@ constexpr size_t kDefaultMaxChunkSize = 32 * 1024 * 1024;
 // MagicNumber for memory checking
 constexpr uint32_t kMagicNumber = 0x01020304;
 
-enum class Compressor {
+enum class Compressor : uint32_t {
   // NoCompression means writing raw chunk data into files.
   // With other choices, chunks are compressed before written.
   kNoCompress = 0,
@@ -45,8 +43,8 @@ public:
   Header();
   Header(uint32_t num, uint32_t sum, Compressor ct, uint32_t cs);
 
-  void Write(Stream* os);
-  void Parse(Stream* iss);
+  void Write(std::ostream& os) const;
+  void Parse(std::istream& is);
 
   uint32_t NumRecords() const { return num_records_; }
   uint32_t Checksum() const { return checksum_; }

paddle/fluid/recordio/header_test.cc

@@ -22,18 +22,10 @@ using namespace paddle::recordio;
 
 TEST(Recordio, ChunkHead) {
   Header hdr(0, 1, Compressor::kGzip, 3);
-  {
-    Stream* oss = Stream::Open("/tmp/record_1", "w");
-    hdr.Write(oss);
-    delete oss;
-  }
-
+  std::stringstream ss;
+  hdr.Write(ss);
+  ss.seekg(0, std::ios::beg);
   Header hdr2;
-  {
-    Stream* iss = Stream::Open("/tmp/record_1", "r");
-    hdr2.Parse(iss);
-    delete iss;
-  }
-
+  hdr2.Parse(ss);
   EXPECT_TRUE(hdr == hdr2);
 }

paddle/fluid/recordio/io.cc

-//   Copyright (c) 2018 PaddlePaddle Authors. All Rights Reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "paddle/fluid/recordio/io.h"
-#include "paddle/fluid/string/piece.h"
-
-#include <iostream>
-
-namespace paddle {
-namespace recordio {
-Stream* Stream::Open(const char* filename, const char* mode) {
-  // Create IOStream for different filesystems
-  // HDFS:   hdfs://tmp/file.txt
-  // Default: /tmp/file.txt
-  FILE* fp = nullptr;
-  if (string::HasPrefix(string::Piece(filename), string::Piece("/"))) {
-    fp = fopen(filename, mode);
-  }
-  return new FileStream(fp);
-}
-
-size_t FileStream::Read(void* ptr, size_t size) {
-  return fread(ptr, 1, size, fp_);
-}
-
-void FileStream::Write(const void* ptr, size_t size) {
-  size_t real = fwrite(ptr, 1, size, fp_);
-  PADDLE_ENFORCE(real == size, "FileStream write incomplete.");
-}
-
-size_t FileStream::Tell() { return ftell(fp_); }
-void FileStream::Seek(size_t p) { fseek(fp_, p, SEEK_SET); }
-
-bool FileStream::Eof() { return feof(fp_); }
-
-void FileStream::Close() {
-  if (fp_ != nullptr) {
-    fclose(fp_);
-    fp_ = nullptr;
-  }
-}
-
-}  // namespace recordio
-}  // namespace paddle

paddle/fluid/recordio/io.h

-//   Copyright (c) 2018 PaddlePaddle Authors. All Rights Reserved.
-//
-// 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.
-
-#pragma once
-
-#include <stdio.h>
-#include <string>
-
-#include "paddle/fluid/platform/enforce.h"
-#include "paddle/fluid/platform/macros.h"  // DISABLE_COPY_ASSIGN
-
-namespace paddle {
-namespace recordio {
-
-// Seekable Stream Interface for read and write
-class Stream {
-public:
-  virtual ~Stream() {}
-  virtual size_t Read(void* ptr, size_t size) = 0;
-  virtual void Write(const void* ptr, size_t size) = 0;
-  virtual size_t Tell() = 0;
-  virtual void Seek(size_t p) = 0;
-  // Create Stream Instance
-  static Stream* Open(const char* filename, const char* mode);
-};
-
-// FileStream
-class FileStream : public Stream {
-public:
-  explicit FileStream(FILE* fp) : fp_(fp) {}
-  ~FileStream() { this->Close(); }
-  size_t Read(void* ptr, size_t size);
-  void Write(const void* ptr, size_t size);
-  size_t Tell();
-  void Seek(size_t p);
-  bool Eof();
-  void Close();
-
-private:
-  FILE* fp_;
-  DISABLE_COPY_AND_ASSIGN(FileStream);
-};
-
-}  // namespace recordio
-}  // namespace paddle

paddle/fluid/recordio/io_test.cc

-//   Copyright (c) 2018 PaddlePaddle Authors. All Rights Reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "paddle/fluid/recordio/io.h"
-
-#include "gtest/gtest.h"
-
-using namespace paddle::recordio;
-
-TEST(FileStream, IO) {
-  {
-    // Write
-    Stream* fs = Stream::Open("/tmp/record_0", "w");
-    fs->Write("hello", 6);
-    delete fs;
-  }
-  {
-    // Read
-    Stream* fs = Stream::Open("/tmp/record_0", "r+");
-    char buf[10];
-    fs->Read(&buf, 6);
-    EXPECT_STREQ(buf, "hello");
-    delete fs;
-  }
-}

paddle/fluid/recordio/range_scanner.cc

-//   Copyright (c) 2018 PaddlePaddle Authors. All Rights Reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "paddle/fluid/recordio/range_scanner.h"
-
-namespace paddle {
-namespace recordio {
-
-void Index::LoadIndex(FileStream* fi) {
-  int64_t offset = 0;
-  while (!fi->Eof()) {
-    Header hdr;
-    hdr.Parse(fi);
-    chunk_offsets_.push_back(offset);
-    chunk_lens_.push_back(hdr.NumRecords());
-    chunk_records_.push_back(hdr.NumRecords());
-    num_records_ += hdr.NumRecords();
-    offset += hdr.CompressSize();
-  }
-}
-
-Index Index::ChunkIndex(int i) { Index idx; }
-
-std::pair<int, int> Index::Locate(int record_idx) {
-  std::pair<int, int> range(-1, -1);
-  int sum = 0;
-  for (size_t i = 0; i < chunk_lens_.size(); ++i) {
-    int len = static_cast<int>(chunk_lens_[i]);
-    sum += len;
-    if (record_idx < sum) {
-      range.first = static_cast<int>(i);
-      range.second = record_idx - sum + len;
-    }
-  }
-  return range;
-}
-
-RangeScanner::RangeScanner(Stream* fi, Index idx, int start, int len)
-    : stream_(fi), index_(idx) {
-  if (start < 0) {
-    start = 0;
-  }
-  if (len < 0 || start + len >= idx.NumRecords()) {
-    len = idx.NumRecords() - start;
-  }
-
-  start_ = start;
-  end_ = start + len;
-  cur_ = start - 1;  // The intial status required by Scan
-  chunk_index_ = -1;
-  chunk_.reset(new Chunk);
-}
-
-bool RangeScanner::Scan() {
-  ++cur_;
-  if (cur_ >= end_) {
-    return false;
-  } else {
-    auto cursor = index_.Locate(cur_);
-    if (chunk_index_ != cursor.first) {
-      chunk_index_ = cursor.first;
-      chunk_->Parse(fi, index_.ChunkOffsets[chunk_index_]);
-    }
-  }
-  return true;
-}
-
-const std::string RangeScanner::Record() {
-  auto cursor = index_.Locate(cur_);
-  return chunk_->Record(cursor.second);
-}
-
-}  // namespace recordio
-}  // namespace paddle

paddle/fluid/recordio/range_scanner.h

-//   Copyright (c) 2018 PaddlePaddle Authors. All Rights Reserved.
-//
-// 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.
-
-#pragma once
-
-#include <utility>
-
-#include "paddle/fluid/recordio/chunk.h"
-#include "paddle/fluid/recordio/io.h"
-
-namespace paddle {
-namespace recordio {
-
-// Index consists offsets and sizes of the consequetive chunks in a RecordIO
-// file.
-//
-// Index supports Gob. Every field in the Index needs to be exported
-// for the correct encoding and decoding using Gob.
-class Index {
-public:
-  Index() : num_records_(0) {}
-  // LoadIndex scans the file and parse chunkOffsets, chunkLens, and len.
-  void LoadIndex(Stream* fi);
-  // NumRecords returns the total number of all records in a RecordIO file.
-  int NumRecords() { return num_records_; }
-  // NumChunks returns the total number of chunks in a RecordIO file.
-  int NumChunks() { return chunk_lens_.size(); }
-  // ChunkIndex return the Index of i-th Chunk.
-  int ChunkIndex(int i);
-
-  int64_t ChunkOffsets(int i) { return chunk_offsets_[i]; }
-
-  // Locate returns the index of chunk that contains the given record,
-  // and the record index within the chunk.  It returns (-1, -1) if the
-  // record is out of range.
-  std::pair<int, int> Locate(int record_idx);
-
-private:
-  // the offset of each chunk in a file.
-  std::vector<int64_t> chunk_offsets_;
-  // the length of each chunk in a file.
-  std::vector<uint32_t> chunk_lens_;
-  // the numer of all records in a file.
-  int num_records_;
-  // the number of records in chunks.
-  std::vector<int> chunk_records_;
-};
-
-// RangeScanner
-class RangeScanner {
-public:
-  // creates a scanner that sequencially reads records in the
-  // range [start, start+len).  If start < 0, it scans from the
-  // beginning.  If len < 0, it scans till the end of file.
-  RangeScanner(Stream* fi, Index idx, int start, int end);
-  // Scan moves the cursor forward for one record and loads the chunk
-  // containing the record if not yet.
-  bool Scan();
-  const std::string Record();
-
-private:
-  Stream* fi;
-  Index index_;
-  int start_, end_, cur_;
-  int chunk_index_;
-  std::unique_ptr<Chunk> chunk_;
-};
-
-}  // namespace recordio
-}  // namespace paddle

paddle/fluid/recordio/range_scanner_test.cc

-//   Copyright (c) 2018 PaddlePaddle Authors. All Rights Reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "paddle/fluid/recordio/range_scanner.h"
-
-#include "gtest/gtest.h"
-
-using namespace paddle::recordio;
-
-TEST(RangeScanner, Recordio) {
-  Stream* fo = Stream::Open("/tmp/record_range", "w");
-}

paddle/fluid/recordio/recordio.cc

-//   Copyright (c) 2018 PaddlePaddle Authors. All Rights Reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "paddle/fluid/recordio/io.h"
-#include "paddle/fluid/string/piece.h"
-
-namespace paddle {
-namespace recordio {}  // namespace recordio
-}  // namespace paddle

paddle/fluid/recordio/recordio.h

-//   Copyright (c) 2018 PaddlePaddle Authors. All Rights Reserved.
-//
-// 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.
-#pragma once
-
-#include "paddle/fluid/recordio/chunk.h"
-#include "paddle/fluid/recordio/header.h"
-#include "paddle/fluid/recordio/io.h"
-#include "paddle/fluid/recordio/scanner.h"
-#include "paddle/fluid/recordio/writer.h"

paddle/fluid/recordio/scanner.cc

-//   Copyright (c) 2018 PaddlePaddle Authors. All Rights Reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "paddle/fluid/recordio/chunk.h"
-
-#include <glob.h>  // glob
-
-namespace paddle {
-namespace recordio {
-
-Scanner::Scanner(const char* paths)
-    : cur_file_(nullptr), path_idx_(0), end_(false) {
-  glob_t glob_result;
-  glob(paths, GLOB_TILDE, NULL, &glob_result);
-
-  for (size_t i = 0; i < glob_result.gl_pathc; ++i) {
-    paths_.emplace_back(std::string(glob_result.gl_pathv[i]));
-  }
-  globfree(&glob_result);
-}
-
-bool Scanner::Scan() {
-  if (end_ == true) {
-    return false;
-  }
-  if (cur_scanner_ == nullptr) {
-    if (!NextFile()) {
-      end_ = true;
-      return false;
-    }
-  }
-  if (!cur_scanner_->Scan()) {
-    end_ = true;
-    cur_file_ = nullptr;
-    return false;
-  }
-  return true;
-}
-
-bool Scanner::NextFile() {
-  if (path_idx_ >= paths_.size()) {
-    return false;
-  }
-  std::string path = paths_[path_idx_];
-  ++path_idx_;
-  cur_file_ = Stream::Open(path);
-  if (cur_file_ == nullptr) {
-    return false;
-  }
-  Index idx;
-  idx.LoadIndex(cur_file_);
-  cur_scanner_ = RangeScanner(cur_file_, idx, 0, -1);
-  return true;
-}
-
-}  // namespace recordio
-}  // namespace paddle

paddle/fluid/recordio/scanner.h

-//   Copyright (c) 2018 PaddlePaddle Authors. All Rights Reserved.
-//
-// 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.
-
-#pragma once
-
-#include "paddle/fluid/recordio/io.h"
-
-namespace paddle {
-namespace recordio {
-
-class RangeScanner;
-
-// Scanner is a scanner for multiple recordio files.
-class Scanner {
-public:
-  Scanner(const char* paths);
-  const std::string Record();
-  bool Scan();
-  void Close();
-  bool NextFile();
-  int Err() { return err_; }
-
-private:
-  std::vector<std::string> paths_;
-  Stream* cur_file_;
-  RangeScanner* cur_scanner_;
-  int path_idx_;
-  bool end_;
-  int err_;
-};
-
-}  // namespace recordio
-}  // namespace paddle

paddle/fluid/recordio/scanner_test.cc

-//   Copyright (c) 2018 PaddlePaddle Authors. All Rights Reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "paddle/fluid/recordio/scanner.h"
-
-#include "gtest/gtest.h"
-
-using namespace paddle::recordio;
-
-TEST(Scanner, Normal) { Scanner s("/tmp/record_*"); }

paddle/fluid/recordio/writer.cc

-//   Copyright (c) 2018 PaddlePaddle Authors. All Rights Reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "paddle/fluid/recordio/writer.h"
-
-namespace paddle {
-namespace recordio {
-
-Writer::Writer(Stream* fo) : stream_(fo), max_chunk_size_(0), compressor_(0) {}
-
-Writer::Writer(Stream* fo, int maxChunkSize, int compressor)
-    : stream_(fo),
-      max_chunk_size_(maxChunkSize),
-      compressor_(static_cast<Compressor>(compressor)) {
-  chunk_.reset(new Chunk);
-}
-
-size_t Writer::Write(const char* buf, size_t length) {
-  if (stream_ == nullptr) {
-    LOG(WARNING) << "Cannot write since writer had been closed.";
-    return 0;
-  }
-  if ((length + chunk_->NumBytes()) > max_chunk_size_) {
-    chunk_->Dump(stream_, compressor_);
-  }
-  chunk_->Add(buf, length);
-  return length;
-}
-
-// size_t Writer::Write(const char* buf, size_t length) {
-//   return Write(std::string(buf, length));
-// }
-
-// size_t Writer::Write(std::string&& buf) {}
-
-void Writer::Close() {
-  chunk_->Dump(stream_, compressor_);
-  stream_ = nullptr;
-}
-
-}  // namespace recordio
-}  // namespace paddle

paddle/fluid/recordio/writer.h

-//   Copyright (c) 2018 PaddlePaddle Authors. All Rights Reserved.
-//
-// 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.
-
-#pragma once
-#include <memory>
-#include <string>
-
-#include "paddle/fluid/recordio/header.h"
-#include "paddle/fluid/recordio/io.h"
-
-namespace paddle {
-namespace recordio {
-
-// Writer creates a RecordIO file.
-class Writer {
-public:
-  Writer(Stream* fo);
-  Writer(Stream* fo, int maxChunkSize, int c);
-
-  // Writes a record.  It returns an error if Close has been called.
-  size_t Write(const char* buf, size_t length);
-
-  // Close flushes the current chunk and makes the writer invalid.
-  void Close();
-
-private:
-  // Set nullptr to mark a closed writer
-  Stream* stream_;
-  // Chunk for store object
-  std::unique_ptr<Chunk> chunk_;
-  // total records size, excluding metadata, before compression.
-  int max_chunk_size_;
-  // Compressor used for chuck
-  Compressor compressor_;
-  DISABLE_COPY_AND_ASSIGN(Writer);
-};
-
-}  // namespace recordio
-}  // namespace paddle

paddle/fluid/recordio/writer_test.cc

-//   Copyright (c) 2018 PaddlePaddle Authors. All Rights Reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "paddle/fluid/recordio/writer.h"
-
-#include "gtest/gtest.h"
-
-using namespace paddle::recordio;
-
-TEST(Writer, Normal) {
-  Stream* fs = Stream::Open("/tmp/record_21", "w");
-  Writer w(fs);
-  w.Write("123", 4);
-
-  // test exception
-  w.Close();
-  EXPECT_ANY_THROW(w.Write("123", 4));
-}