Upstream version 10.39.225.0

[platform/framework/web/crosswalk.git] / src / native_client_sdk / src / libraries / nacl_io / html5fs / html5_fs.cc

diff --git a/src/native_client_sdk/src/libraries/nacl_io/html5fs/html5_fs.cc b/src/native_client_sdk/src/libraries/nacl_io/html5fs/html5_fs.cc
index f7a622f..9a5aaf3 100644 (file)
--- a/src/native_client_sdk/src/libraries/nacl_io/html5fs/html5_fs.cc
+++ b/src/native_client_sdk/src/libraries/nacl_io/html5fs/html5_fs.cc
@@ -29,13 +29,43 @@ int64_t strtoull(const char* nptr, char** endptr, int base) {
 
 }  // namespace
 
-Error Html5Fs::Access(const Path& path, int a_mode) {
-  // a_mode is unused, since all files are readable, writable and executable.
-  ScopedNode node;
-  return Open(path, O_RDONLY, &node);
+// Continuing DJB2a hash
+ino_t Html5Fs::HashPathSegment(ino_t hash, const char *str, size_t len) {
+  // First add the path seperator
+  hash = (hash * static_cast<ino_t>(33)) ^ '/';
+  while (len--) {
+    hash = (hash * static_cast<ino_t>(33)) ^ *str++;
+  }
+  return hash;
+}
+
+ino_t Html5Fs::HashPath(const Path& path) {
+  // Prime the DJB2a hash
+  ino_t hash = 5381;
+
+  // Apply a running DJB2a to each part of the path
+  for (size_t segment = 0; segment < path.Size(); segment++) {
+    const char *ptr = path.Part(segment).c_str();
+    size_t len = path.Part(segment).length();
+    hash = HashPathSegment(hash, ptr, len);
+  }
+  return hash;
+}
+
+
+// For HTML5, the INO should be the one used by the system, however PPAPI
+// does not provide access to the real INO.  Instead, since HTML5 does not
+// suport links, we assume that files are unique based on path to the base
+// of the mount.
+void Html5Fs::OnNodeCreated(Node* node) {
+  node->stat_.st_dev = dev_;
 }
 
-Error Html5Fs::Open(const Path& path, int open_flags, ScopedNode* out_node) {
+void Html5Fs::OnNodeDestroyed(Node* node) {}
+
+
+Error Html5Fs::OpenWithMode(const Path& path, int open_flags, mode_t mode,
+                            ScopedNode* out_node) {
   out_node->reset(NULL);
   Error error = BlockUntilFilesystemOpen();
   if (error)
@@ -48,6 +78,10 @@ Error Html5Fs::Open(const Path& path, int open_flags, ScopedNode* out_node) {
 
   ScopedNode node(new Html5FsNode(this, fileref));
   error = node->Init(open_flags);
+
+  // Set the INO based on the path
+  node->stat_.st_ino = HashPath(path);
+
   if (error)
     return error;
 
@@ -180,6 +214,8 @@ Html5Fs::Html5Fs()
 }
 
 Error Html5Fs::Init(const FsInitArgs& args) {
+  pthread_cond_init(&filesystem_open_cond_, NULL);
+
   Error error = Filesystem::Init(args);
   if (error)
     return error;
@@ -204,8 +240,6 @@ Error Html5Fs::Init(const FsInitArgs& args) {
     return ENOSYS;
   }
 
-  pthread_cond_init(&filesystem_open_cond_, NULL);
-
   // Parse filesystem args.
   PP_FileSystemType filesystem_type = PP_FILESYSTEMTYPE_LOCALPERSISTENT;
   int64_t expected_size = 0;
@@ -277,7 +311,8 @@ Error Html5Fs::Init(const FsInitArgs& args) {
 }
 
 void Html5Fs::Destroy() {
-  ppapi_->ReleaseResource(filesystem_resource_);
+  if (ppapi_ != NULL && filesystem_resource_ != 0)
+    ppapi_->ReleaseResource(filesystem_resource_);
   pthread_cond_destroy(&filesystem_open_cond_);
 }