Fuchsia: Build standalone VM. Make it run "Hello, World!".

runtime/bin/directory_fuchsia.cc

Index: runtime/bin/directory_fuchsia.cc
diff --git a/runtime/bin/directory_fuchsia.cc b/runtime/bin/directory_fuchsia.cc
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+++ b/runtime/bin/directory_fuchsia.cc
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+// Copyright (c) 2016, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+#include "platform/globals.h"
+#if defined(TARGET_OS_FUCHSIA)
+
+#include "bin/directory.h"
+
+#include <errno.h>  // NOLINT
+#include <stdlib.h>  // NOLINT
+#include <string.h>  // NOLINT
+#include <unistd.h>  // NOLINT
+
+namespace dart {
+namespace bin {
+
+PathBuffer::PathBuffer() : length_(0) {
+  data_ = calloc(PATH_MAX + 1, sizeof(char));  // NOLINT
+}
+
+
+PathBuffer::~PathBuffer() {
+  free(data_);
+}
+
+
+bool PathBuffer::AddW(const wchar_t* name) {
+  UNREACHABLE();
+  return false;
+}
+
+
+char* PathBuffer::AsString() const {
+  return reinterpret_cast<char*>(data_);
+}
+
+
+wchar_t* PathBuffer::AsStringW() const {
+  UNREACHABLE();
+  return NULL;
+}
+
+
+const char* PathBuffer::AsScopedString() const {
+  return DartUtils::ScopedCopyCString(AsString());
+}
+
+
+bool PathBuffer::Add(const char* name) {
+  const intptr_t name_length = strnlen(name, PATH_MAX + 1);
+  if (name_length == 0) {
+    errno = EINVAL;
+    return false;
+  }
+  char* data = AsString();
+  int written = snprintf(data + length_,
+                         PATH_MAX - length_,
+                         "%s",
+                         name);
+  data[PATH_MAX] = '\0';
+  if ((written <= (PATH_MAX - length_)) &&
+      (written > 0) &&
+      (static_cast<size_t>(written) == strnlen(name, PATH_MAX + 1))) {
+    length_ += written;
+    return true;
+  } else {
+    errno = ENAMETOOLONG;
+    return false;
+  }
+}
+
+
+void PathBuffer::Reset(intptr_t new_length) {
+  length_ = new_length;
+  AsString()[length_] = '\0';
+}
+
+
+ListType DirectoryListingEntry::Next(DirectoryListing* listing) {
+  UNIMPLEMENTED();
+  return kListError;
+}
+
+
+DirectoryListingEntry::~DirectoryListingEntry() {
+  UNIMPLEMENTED();
+}
+
+
+void DirectoryListingEntry::ResetLink() {
+  UNIMPLEMENTED();
+}
+
+
+Directory::ExistsResult Directory::Exists(const char* dir_name) {
+  UNIMPLEMENTED();
+  return UNKNOWN;
+}
+
+
+char* Directory::CurrentNoScope() {
+  return getcwd(NULL, 0);
+}
+
+
+const char* Directory::Current() {
+  char buffer[PATH_MAX];
+  if (getcwd(buffer, PATH_MAX) == NULL) {
+    return NULL;
+  }
+  return DartUtils::ScopedCopyCString(buffer);
+}
+
+
+bool Directory::SetCurrent(const char* path) {
+  UNIMPLEMENTED();
+  return false;
+}
+
+
+bool Directory::Create(const char* dir_name) {
+  UNIMPLEMENTED();
+  return false;
+}
+
+
+const char* Directory::SystemTemp() {
+  UNIMPLEMENTED();
+  return NULL;
+}
+
+
+const char* Directory::CreateTemp(const char* prefix) {
+  UNIMPLEMENTED();
+  return NULL;
+}
+
+
+bool Directory::Delete(const char* dir_name, bool recursive) {
+  UNIMPLEMENTED();
+  return false;
+}
+
+
+bool Directory::Rename(const char* path, const char* new_path) {
+  UNIMPLEMENTED();
+  return false;
+}
+
+}  // namespace bin
+}  // namespace dart
+
+#endif  // defined(TARGET_OS_LINUX)