Implement nacl_irt_fdio for non-sfi mode.

components/nacl/loader/nonsfi/abi_conversion.cc

Index: components/nacl/loader/nonsfi/abi_conversion.cc
diff --git a/components/nacl/loader/nonsfi/abi_conversion.cc b/components/nacl/loader/nonsfi/abi_conversion.cc
new file mode 100644
index 0000000000000000000000000000000000000000..59771062bf41ba77a53aeee524e9a26a39bcf3dc
--- /dev/null
+++ b/components/nacl/loader/nonsfi/abi_conversion.cc
@@ -0,0 +1,61 @@
+// 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 <sys/stat.h>
+#include <sys/types.h>
+#include <unistd.h>
+#include <cstring>

[Mark Seaborn, 2014/01/10 13:11:20]

Nit: sort #includes within block

[hidehiko, 2014/01/15 03:50:44]

This is sorted. According to the style guide, C system files are followed by C++
system files.
(and actually our lint warned when I reordered.)

cf)
http://google-styleguide.googlecode.com/svn/trunk/cppguide.xml?showone=Names_...

+
+#include "base/logging.h"
+#include "native_client/src/trusted/service_runtime/include/sys/stat.h"
+
+namespace nacl {
+namespace nonsfi {
+
+void StatToNaClAbiStat(
+    const struct stat& host_stat, struct nacl_abi_stat* nacl_stat) {
+  // Some fields in host_stat, such as st_dev, group/other bits of mode and
+  // (a,m,c)timensec, are ignored to sync with the NaCl's original
+  // implementation. Please see also NaClAbiStatHostDescStatXlateCtor in
+  // native_client/src/trusted/desc/posix/nacl_desc.c.
+  std::memset(nacl_stat, 0, sizeof(*nacl_stat));
+  nacl_stat->nacl_abi_st_dev = 0;
+  nacl_stat->nacl_abi_st_ino = host_stat.st_ino;
+  nacl_abi_mode_t mode;
+  switch (host_stat.st_mode & S_IFMT) {
+    case S_IFREG:
+      mode = NACL_ABI_S_IFREG;
+      break;
+    case S_IFDIR:
+      mode = NACL_ABI_S_IFDIR;
+      break;
+    case S_IFCHR:
+      mode = NACL_ABI_S_IFCHR;
+      break;
+    default:
+      LOG(WARNING) << "Unusual NaCl descriptor type: "
+                   << (host_stat.st_mode & S_IFMT);
+      mode = NACL_ABI_S_UNSUP;
+  }
+  if (host_stat.st_mode & S_IRUSR)
+    mode |= NACL_ABI_S_IRUSR;
+  if (host_stat.st_mode & S_IWUSR)
+    mode |= NACL_ABI_S_IWUSR;
+  if (host_stat.st_mode & S_IXUSR)
+    mode |= NACL_ABI_S_IXUSR;
+  nacl_stat->nacl_abi_st_mode = mode;
+  nacl_stat->nacl_abi_st_nlink = host_stat.st_nlink;
+  nacl_stat->nacl_abi_st_uid = -1;  // Not root
+  nacl_stat->nacl_abi_st_gid = -1;  // Not wheel
+  nacl_stat->nacl_abi_st_rdev = 0;
+  nacl_stat->nacl_abi_st_size = host_stat.st_size;
+  nacl_stat->nacl_abi_st_blksize = 0;
+  nacl_stat->nacl_abi_st_blocks = 0;
+  nacl_stat->nacl_abi_st_atime = host_stat.st_atime;
+  nacl_stat->nacl_abi_st_mtime = host_stat.st_mtime;
+  nacl_stat->nacl_abi_st_ctime = host_stat.st_ctime;
+}
+
+}  // namespace nonsfi
+}  // namespace nacl