ijar: implement stat_file on Windows

See https://github.com/bazelbuild/bazel/issues/2157

--
PiperOrigin-RevId: 148887981
MOS_MIGRATED_REVID=148887981

2 files changed, 53 insertions, 11 deletions

diff --git a/third_party/ijar/BUILD b/third_party/ijar/BUILD
index a623d862f2..5e97bc84c6 100644
--- a/third_party/ijar/BUILD
+++ b/third_party/ijar/BUILD
@@ -51,6 +51,16 @@ cc_library(
         "platform_utils.h",
     ],
     visibility = ["//visibility:private"],
+    deps = select({
+        "//src:windows": [
+            "//src/main/cpp/util:file",
+        ],
+        "//src:windows_msvc": [
+            "//src/main/cpp/util:file",
+        ],
+        "//conditions:default": [
+        ],
+    }),
 )
 
 cc_binary(
@@ -74,4 +84,4 @@ filegroup(
     name = "srcs",
     srcs = glob(["**"]) + ["//third_party/ijar/test:srcs"],
     visibility = ["//third_party:__pkg__"],
-)
\ No newline at end of file
+)
diff --git a/third_party/ijar/platform_utils.cc b/third_party/ijar/platform_utils.cc
index 5eced72362..ce6fb54bd2 100644
--- a/third_party/ijar/platform_utils.cc
+++ b/third_party/ijar/platform_utils.cc
@@ -18,26 +18,58 @@
 #include <limits.h>
 #include <stdio.h>
 
-#ifdef COMPILER_MSVC
-#else  // not COMPILER_MSVC
+#if defined(COMPILER_MSVC) || defined(__CYGWIN__)
+#include <windows.h>
+#endif  // defined(COMPILER_MSVC) || defined(__CYGWIN__)
+
+#ifndef COMPILER_MSVC
 #include <fcntl.h>
 #include <sys/stat.h>
 #include <unistd.h>
-#endif  // COMPILER_MSVC
+#endif  // not COMPILER_MSVC
 
 #include <string>
 
+#if defined(COMPILER_MSVC) || defined(__CYGWIN__)
+#include "src/main/cpp/util/errors.h"
+#include "src/main/cpp/util/file_platform.h"
+#endif  // defined(COMPILER_MSVC) || defined(__CYGWIN__)
+
 namespace devtools_ijar {
 
 using std::string;
 
 bool stat_file(const char* path, Stat* result) {
-#ifdef COMPILER_MSVC
-  // TODO(laszlocsomor) 2016-12-01: implement this and other methods, in order
-  // to close https://github.com/bazelbuild/bazel/issues/2157.
-  fprintf(stderr, "Not yet implemented on Windows\n");
-  return false;
-#else   // not COMPILER_MSVC
+#if defined(COMPILER_MSVC) || defined(__CYGWIN__)
+  std::wstring wpath;
+  if (!blaze_util::AsWindowsPathWithUncPrefix(path, &wpath)) {
+    blaze_util::die(255, "stat_file: AsWindowsPathWithUncPrefix(%s) failed",
+                    path);
+  }
+  bool success = false;
+  BY_HANDLE_FILE_INFORMATION info;
+  HANDLE handle = ::CreateFileW(
+      /* lpFileName */ wpath.c_str(),
+      /* dwDesiredAccess */ GENERIC_READ,
+      /* dwShareMode */ FILE_SHARE_READ,
+      /* lpSecurityAttributes */ NULL,
+      /* dwCreationDisposition */ OPEN_EXISTING,
+      /* dwFlagsAndAttributes */ FILE_ATTRIBUTE_NORMAL,
+      /* hTemplateFile */ NULL);
+  if (handle != INVALID_HANDLE_VALUE &&
+      ::GetFileInformationByHandle(handle, &info)) {
+    success = true;
+    // TODO(laszlocsomor): use info.nFileSizeHigh after we updated total_size to
+    // be u8 type.
+    result->total_size = info.nFileSizeLow;
+    // TODO(laszlocsomor): query the actual permissions and write in file_mode.
+    result->file_mode = 0777;
+    result->is_directory = (info.dwFileAttributes != INVALID_FILE_ATTRIBUTES) &&
+                           (info.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY);
+  }
+  ::CloseHandle(handle);
+  return success;
+#else   // !(defined(COMPILER_MSVC) || defined(__CYGWIN__))
   struct stat statst;
   if (stat(path, &statst) < 0) {
     return false;
@@ -46,7 +78,7 @@ bool stat_file(const char* path, Stat* result) {
   result->file_mode = statst.st_mode;
   result->is_directory = (statst.st_mode & S_IFDIR) != 0;
   return true;
-#endif  // COMPILER_MSVC
+#endif  // defined(COMPILER_MSVC) || defined(__CYGWIN__)
 }
 
 bool write_file(const char* path, mode_t perm, const void* data, size_t size) {