Rename mount

native_client_sdk/src/libraries/nacl_mounts/mount_node_dir.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_dir.h"
-
-#include <errno.h>
-#include <string.h>
-
-#include "nacl_mounts/osdirent.h"
-#include "nacl_mounts/osstat.h"
-#include "utils/macros.h"
-#include "utils/auto_lock.h"
-
-MountNodeDir::MountNodeDir(Mount* mount)
-    : MountNode(mount),
-      cache_(NULL) {
-  stat_.st_mode |= S_IFDIR;
-}
-
-MountNodeDir::~MountNodeDir() {
-  free(cache_);
-}
-
-int MountNodeDir::Read(size_t offs, void *buf, size_t count) {
-  errno = EISDIR;
-  return -1;
-}
-
-int MountNodeDir::Truncate(size_t size) {
-  errno = EISDIR;
-  return -1;
-}
-
-int MountNodeDir::Write(size_t offs, void *buf, size_t count) {
-  errno = EISDIR;
-  return -1;
-}
-
-int MountNodeDir::GetDents(size_t offs, struct dirent* pdir, size_t size) {
-  AutoLock lock(&lock_);
-
-  // If the buffer pointer is invalid, fail
-  if (NULL == pdir) {
-    errno = EINVAL;
-    return -1;
-  }
-
-  // If the buffer is too small, fail
-  if (size < sizeof(struct dirent)) {
-    errno = EINVAL;
-    return -1;
-  }
-
-  // Force size to a multiple of dirent
-  size -= size % sizeof(struct dirent);
-  size_t max = map_.size() * sizeof(struct dirent);
-  if (cache_ == NULL) BuildCache();
-
-  if (offs >= max) return 0;
-  if (offs + size >= max) size = max - offs;
-
-  memcpy(pdir, ((char *) cache_) + offs, size);
-  return size;
-}
-
-int MountNodeDir::AddChild(const std::string& name, MountNode* node) {
-  AutoLock lock(&lock_);
-
-  if (name.empty()) {
-    errno = ENOENT;
-    return -1;
-  }
-  if (name.length() >= MEMBER_SIZE(struct dirent, d_name)) {
-    errno = ENAMETOOLONG;
-    return -1;
-  }
-
-  MountNodeMap_t::iterator it = map_.find(name);
-  if (it != map_.end()) {
-    errno = EEXIST;
-    return -1;
-  }
-
-  node->Link();
-  map_[name] = node;
-  ClearCache();
-  return 0;
-}
-
-int MountNodeDir::RemoveChild(const std::string& name) {
-  AutoLock lock(&lock_);
-  MountNodeMap_t::iterator it = map_.find(name);
-  if (it != map_.end()) {
-    it->second->Unlink();
-    map_.erase(it);
-    ClearCache();
-    return 0;
-  }
-  errno = ENOENT;
-  return -1;
-}
-
-MountNode* MountNodeDir::FindChild(const std::string& name) {
-  AutoLock lock(&lock_);
-  MountNodeMap_t::iterator it = map_.find(name);
-  if (it != map_.end()) {
-    return it->second;
-  }
-  errno = ENOENT;
-  return NULL;
-}
-
-int MountNodeDir::ChildCount() {
-  AutoLock lock(&lock_);
-  return map_.size();
-}
-
-void MountNodeDir::ClearCache() {
-  free(cache_);
-  cache_ = NULL;
-}
-
-void MountNodeDir::BuildCache() {
-  if (map_.size()) {
-    cache_ = (struct dirent *) malloc(sizeof(struct dirent) * map_.size());
-    MountNodeMap_t::iterator it = map_.begin();
-    for (size_t index = 0; it != map_.end(); it++, index++) {
-      MountNode* node = it->second;
-      size_t len = it->first.length();
-      cache_[index].d_ino = node->stat_.st_ino;
-      cache_[index].d_reclen = sizeof(struct dirent);
-      cache_[index].d_name[len] = 0;
-      strncpy(cache_[index].d_name, &it->first[0], len);
-    }
-  }
-}