Rename mount

native_client_sdk/src/libraries/nacl_mounts/mount_node_mem.cc

-/* Copyright (c) 2012 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 "nacl_mounts/mount_node_mem.h"
-
-#include <errno.h>
-#include <string.h>
-
-#include "nacl_mounts/osstat.h"
-#include "utils/auto_lock.h"
-
-#define BLOCK_SIZE (1 << 16)
-#define BLOCK_MASK (BLOCK_SIZE - 1)
-
-MountNodeMem::MountNodeMem(Mount *mount)
-    : MountNode(mount),
-      data_(NULL),
-      capacity_(0) {
-  stat_.st_mode |= S_IFREG;
-}
-
-MountNodeMem::~MountNodeMem() {
-  free(data_);
-}
-
-int MountNodeMem::Read(size_t offs, void *buf, size_t count) {
-  AutoLock lock(&lock_);
-  if (count == 0) return 0;
-  if (offs + count > GetSize()) {
-    count = GetSize() - offs;
-  }
-
-  memcpy(buf, &data_[offs], count);
-  return static_cast<int>(count);
-}
-
-int MountNodeMem::Write(size_t offs, const void *buf, size_t count) {
-  AutoLock lock(&lock_);
-
-  if (count == 0) return 0;
-
-  if (count + offs > GetSize()) {
-    Truncate(count + offs);
-    count = GetSize() - offs;
-  }
-
-  memcpy(&data_[offs], buf, count);
-  return static_cast<int>(count);
-}
-
-int MountNodeMem::Truncate(size_t size) {
-  size_t need = (size + BLOCK_MASK) & ~BLOCK_MASK;
-
-  // If the current capacity is correct, just adjust and return
-  if (need == capacity_) {
-    stat_.st_size = static_cast<off_t>(size);
-    return 0;
-  }
-
-  // Attempt to realloc the block
-  char *newdata = static_cast<char *>(realloc(data_, need));
-  if (newdata != NULL) {
-    // Zero out new space.
-    if (size > GetSize())
-      memset(newdata + GetSize(), 0, size - GetSize());
-
-    data_ = newdata;
-    capacity_ = need;
-    stat_.st_size = static_cast<off_t>(size);
-    return 0;
-  }
-
-  // If we failed, then adjust size according to what we keep
-  if (size > capacity_) size = capacity_;
-
-  // Update the size and return the new size
-  stat_.st_size = static_cast<off_t>(size);
-  errno = EIO;
-  return -1;
-}