Initial import of the Chrome Frame codebase. Integration in chrome.gyp coming...

chrome_frame/urlmon_upload_data_stream.cc

+// Copyright (c) 2009 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "chrome_frame/urlmon_upload_data_stream.h"
+
+#include "net/base/io_buffer.h"
+
+void UrlmonUploadDataStream::Initialize(net::UploadData* upload_data) {
+  upload_data_ = upload_data;
+  request_body_stream_.reset(new net::UploadDataStream(upload_data));
+}
+
+STDMETHODIMP UrlmonUploadDataStream::Read(void* pv, ULONG cb, ULONG* read) {
+  if (pv == NULL) {
+    NOTREACHED();
+    return E_POINTER;
+  }
+
+  // Have we already read past the end of the stream?
+  if (request_body_stream_->position() >= request_body_stream_->size()) {
+    if (read) {
+      *read = 0;
+    }
+    return S_FALSE;
+  }
+
+  uint64 total_bytes_to_copy = std::min(static_cast<uint64>(cb),
+      request_body_stream_->size() - request_body_stream_->position());
+  uint64 initial_position = request_body_stream_->position();
+
+  uint64 bytes_copied = 0;
+
+  char* write_pointer = reinterpret_cast<char*>(pv);
+  while (bytes_copied < total_bytes_to_copy) {
+    net::IOBuffer* buf = request_body_stream_->buf();
+
+    // Make sure our length doesn't run past the end of the available data.
+    size_t bytes_to_copy_now = static_cast<size_t>(
+        std::min(static_cast<uint64>(request_body_stream_->buf_len()),
+                 total_bytes_to_copy - bytes_copied));
+
+    memcpy(write_pointer, buf->data(), bytes_to_copy_now);
+
+    // Advance our copy tally
+    bytes_copied += bytes_to_copy_now;
+
+    // Advance our write pointer
+    write_pointer += bytes_to_copy_now;
+
+    // Advance the UploadDataStream read pointer:
+    request_body_stream_->DidConsume(bytes_to_copy_now);
+  }
+
+  DCHECK(bytes_copied == total_bytes_to_copy);
+  DCHECK(request_body_stream_->position() ==
+         initial_position + total_bytes_to_copy);
+
+  if (read) {
+    *read = static_cast<ULONG>(total_bytes_to_copy);
+  }
+
+  return S_OK;
+}
+
+STDMETHODIMP UrlmonUploadDataStream::Seek(LARGE_INTEGER move, DWORD origin,
+                                          ULARGE_INTEGER* new_pos) {
+  // UploadDataStream is really not very seek-able, so for now allow
+  // STREAM_SEEK_SETs to work with a 0 offset, but fail on everything else.
+  if (origin == STREAM_SEEK_SET && move.QuadPart == 0) {
+    if (request_body_stream_->position() != 0) {
+      request_body_stream_.reset(new net::UploadDataStream(upload_data_));
+    }
+    if (new_pos) {
+      new_pos->QuadPart = 0;
+    }
+    return S_OK;
+  }
+
+  DCHECK(false) << __FUNCTION__;
+  return STG_E_INVALIDFUNCTION;
+}
+
+STDMETHODIMP UrlmonUploadDataStream::Stat(STATSTG *stat_stg,
+                                          DWORD grf_stat_flag) {
+  if (stat_stg == NULL)
+    return E_POINTER;
+
+  memset(stat_stg, 0, sizeof(STATSTG));
+  if (0 == (grf_stat_flag & STATFLAG_NONAME)) {
+    const wchar_t kStreamBuffer[] = L"PostStream";
+    stat_stg->pwcsName =
+        static_cast<wchar_t*>(::CoTaskMemAlloc(sizeof(kStreamBuffer)));
+    lstrcpy(stat_stg->pwcsName, kStreamBuffer);
+  }
+  stat_stg->type = STGTY_STREAM;
+  stat_stg->cbSize.QuadPart = upload_data_->GetContentLength();
+  return S_OK;
+}