Move //mojo/shell to //shell

shell/data_pipe_peek.cc

 // Copyright 2014 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 "mojo/shell/data_pipe_peek.h"
+#include "shell/data_pipe_peek.h"
 
 #include "base/bind.h"
 
 namespace mojo {
 namespace shell {
 
 namespace {
 
 // Sleep for as long as max_sleep_micros if the deadline hasn't been reached
 // and the number of bytes read is still increasing. Returns true if sleep
 // was actually called.
 //
 // This class is a substitute for being able to wait until N bytes are available
 // from a data pipe. The MaybeSleep method is called when num_bytes_read are
 // available but more are needed by the Peek operation. If a second
 // Peek operation finds the same number of bytes after sleeping we assume
 // that there's no point in trying again.
 // TODO(hansmuller): this heuristic is weak. crbug.com/429377
 class PeekSleeper {
  public:
   explicit PeekSleeper(MojoTimeTicks deadline)
       : deadline_(deadline),
-        kMaxSleepMicros_(1000 * 10), // 10ms
-        last_number_bytes_read_(0) {
-  }
+        kMaxSleepMicros_(1000 * 10),  // 10ms
+        last_number_bytes_read_(0) {}
 
   bool MaybeSleep(uint32 num_bytes_read) {
     if (num_bytes_read > 0 && last_number_bytes_read_ >= num_bytes_read)
       return false;
     last_number_bytes_read_ = num_bytes_read;
 
     MojoTimeTicks now(GetTimeTicksNow());
     if (now > deadline_)
       return false;
 
-    MojoTimeTicks sleep_time = (deadline_ == 0)
-        ? kMaxSleepMicros_
-        : std::min<int64>(deadline_ - now, PeekSleeper::kMaxSleepMicros_);
+    MojoTimeTicks sleep_time =
+        (deadline_ == 0)
+            ? kMaxSleepMicros_
+            : std::min<int64>(deadline_ - now, PeekSleeper::kMaxSleepMicros_);
     base::PlatformThread::Sleep(base::TimeDelta::FromMicroseconds(sleep_time));
     return true;
   }
 
  private:
-  const MojoTimeTicks deadline_; // 0 => MOJO_DEADLINE_INDEFINITE
+  const MojoTimeTicks deadline_;  // 0 => MOJO_DEADLINE_INDEFINITE
   const MojoTimeTicks kMaxSleepMicros_;
   uint32 last_number_bytes_read_;
 
   MOJO_DISALLOW_COPY_AND_ASSIGN(PeekSleeper);
 };
 
 enum PeekStatus { kSuccess, kFail, kKeepReading };
 typedef const base::Callback<PeekStatus(const void*, uint32_t, std::string*)>&
     PeekFunc;
 
 // When data is available on source, call peek_func and then either return true
 // and value, continue waiting for enough data to satisfy peek_func, or fail
 // and return false. Fail if the timeout is exceeded.
 // This function is not guaranteed to work correctly if applied to a data pipe
 // that's already been read from.
 bool BlockingPeekHelper(DataPipeConsumerHandle source,
                         std::string* value,
                         MojoDeadline timeout,
                         PeekFunc peek_func) {
   DCHECK(value);
   value->clear();
 
-  MojoTimeTicks deadline = (timeout == MOJO_DEADLINE_INDEFINITE) ? 0
-      : 1 + GetTimeTicksNow() + static_cast<MojoTimeTicks>(timeout);
+  MojoTimeTicks deadline =
+      (timeout == MOJO_DEADLINE_INDEFINITE)
+          ? 0
+          : 1 + GetTimeTicksNow() + static_cast<MojoTimeTicks>(timeout);
   PeekSleeper sleeper(deadline);
 
   MojoResult result;
   do {
     const void* buffer;
     uint32_t num_bytes;
     result =
         BeginReadDataRaw(source, &buffer, &num_bytes, MOJO_READ_DATA_FLAG_NONE);
 
     if (result == MOJO_RESULT_OK) {
       PeekStatus status = peek_func.Run(buffer, num_bytes, value);
       CHECK_EQ(EndReadDataRaw(source, 0), MOJO_RESULT_OK);
       switch (status) {
-        case PeekStatus::kSuccess: return true;
-        case PeekStatus::kFail: return false;
-        case PeekStatus::kKeepReading: break;
+        case PeekStatus::kSuccess:
+          return true;
+        case PeekStatus::kFail:
+          return false;
+        case PeekStatus::kKeepReading:
+          break;
       }
       if (!sleeper.MaybeSleep(num_bytes))
         return false;
     } else if (result == MOJO_RESULT_SHOULD_WAIT) {
       MojoTimeTicks now(GetTimeTicksNow());
       if (timeout == MOJO_DEADLINE_INDEFINITE || now < deadline)
         result = Wait(source, MOJO_HANDLE_SIGNAL_READABLE, deadline - now);
     }
-  }
-  while(result == MOJO_RESULT_OK);
+  } while (result == MOJO_RESULT_OK);
 
   return false;
 }
 
 PeekStatus PeekLine(size_t max_line_length,
                     const void* buffer,
                     uint32 buffer_num_bytes,
                     std::string* line) {
   const char* p = static_cast<const char*>(buffer);
   size_t max_p_index = std::min<size_t>(buffer_num_bytes, max_line_length);
   for (size_t i = 0; i < max_p_index; i++) {
     if (p[i] == '\n') {
-      *line = std::string(p, i + 1); // Include the trailing newline.
+      *line = std::string(p, i + 1);  // Include the trailing newline.
       return PeekStatus::kSuccess;
     }
   }
-  return (buffer_num_bytes >= max_line_length)
-      ? PeekStatus::kFail : PeekStatus::kKeepReading;
+  return (buffer_num_bytes >= max_line_length) ? PeekStatus::kFail
+                                               : PeekStatus::kKeepReading;
 }
 
 PeekStatus PeekNBytes(size_t bytes_length,
                       const void* buffer,
                       uint32 buffer_num_bytes,
                       std::string* bytes) {
   if (buffer_num_bytes >= bytes_length) {
     const char* p = static_cast<const char*>(buffer);
     *bytes = std::string(p, bytes_length);
     return PeekStatus::kSuccess;
   }
   return PeekStatus::kKeepReading;
 }
 
-} // namespace
-
+}  // namespace
 
 bool BlockingPeekNBytes(DataPipeConsumerHandle source,
                         std::string* bytes,
                         size_t bytes_length,
                         MojoDeadline timeout) {
   PeekFunc peek_nbytes = base::Bind(PeekNBytes, bytes_length);
   return BlockingPeekHelper(source, bytes, timeout, peek_nbytes);
 }
 
 bool BlockingPeekLine(DataPipeConsumerHandle source,
                       std::string* line,
                       size_t max_line_length,
                       MojoDeadline timeout) {
   PeekFunc peek_line = base::Bind(PeekLine, max_line_length);
   return BlockingPeekHelper(source, line, timeout, peek_line);
 }
 
-} // namespace shell
-} // namespace mojo
+}  // namespace shell
+}  // namespace mojo