Initial commit of System.IO.Native with stat shims

Author: nguerrera

src/Native/CMakeLists.txt

@@ -0,0 +1,26 @@
+cmake_minimum_required(VERSION 2.8.12)
+project(CoreFX)
+
+set(CMAKE_INSTALL_PREFIX $ENV{__CMakeBinDir})
+set(CMAKE_INCLUDE_CURRENT_DIR ON)
+set(CMAKE_C_FLAGS "-std=c11")
+set(CMAKE_CXX_FLAGS "-std=c++11")
+set(CMAKE_SHARED_LIBRARY_PREFIX "")
+add_compile_options(-Wall -Werror -fPIC)
+
+if (CMAKE_SYSTEM_PROCESSOR STREQUAL x86_64 OR CMAKE_SYSTEM_PROCESSOR STREQUAL amd64)
+    add_definitions(-DBIT64=1)
+endif ()
+
+string(TOUPPER ${CMAKE_BUILD_TYPE} UPPERCASE_CMAKE_BUILD_TYPE)
+if (UPPERCASE_CMAKE_BUILD_TYPE STREQUAL DEBUG)
+    add_compile_options(-g -O0)
+    add_definitions(-DDEBUG)
+elseif (UPPERCASE_CMAKE_BUILD_TYPE STREQUAL RELEASE)
+    add_compile_options (-O3)
+    add_definitions(-DNDEBUG)
+else ()
+    message(FATAL_ERROR "Unknown build type. Set CMAKE_BUILD_TYPE to DEBUG or RELEASE.")
+endif ()
+
+add_subdirectory(System.IO.Native)

src/Native/System.IO.Native/CMakeLists.txt

@@ -0,0 +1,15 @@
+
+project(System.IO.Native)
+
+set(NATIVEIO_SOURCES
+    nativeio.h
+    nativeio.cpp
+)
+
+add_library(System.IO.Native
+    SHARED
+    ${NATIVEIO_SOURCES}
+)
+
+install (TARGETS System.IO.Native DESTINATION .)
+ 

src/Native/System.IO.Native/nativeio.cpp

@@ -0,0 +1,61 @@
+//
+// Copyright (c) Microsoft. All rights reserved.
+// Licensed under the MIT license. See LICENSE file in the project root for full license information.
+//
+
+#include "nativeio.h"
+#include <sys/stat.h>
+
+#if HAVE_STAT64 && !(defined(__APPLE__) && defined(_AMD64_))
+#    define stat_ stat64
+#    define fstat_ fstat64
+#else
+#   define stat_ stat
+#   define fstat_ fstat
+#endif
+
+static void ConvertFileStats(const struct stat_& src, FileStats* dst)
+{
+    dst->Flags = FILESTATS_FLAGS_NONE;
+    dst->Mode = src.st_mode;
+    dst->Uid = src.st_uid;
+    dst->Gid = src.st_gid;
+    dst->Size = src.st_size;
+    dst->AccessTime = src.st_atime;
+    dst->ModificationTime = src.st_mtime;
+    dst->StatusChangeTime = src.st_ctime;
+
+#if HAVE_STAT_BIRTHTIME
+    dst->CreationTime = src->st_birthtime;
+    dst->Flags |= FILESTATS_FLAGS_HAS_CREATION_TIME;
+#endif
+}
+
+extern "C"
+{
+    int32_t GetFileStatsFromPath(const char* path, struct FileStats* output)
+    {
+        struct stat_ result;
+        int ret = stat_(path, &result);
+
+        if (ret == 0)
+        {
+            ConvertFileStats(result, output);
+        }
+
+        return ret;
+    }
+
+    int32_t GetFileStatsFromDescriptor(int32_t fileDescriptor, FileStats* output)
+    {
+        struct stat_ result;
+        int ret = fstat_(fileDescriptor, &result);
+
+        if (ret == 0)
+        {
+            ConvertFileStats(result, output);
+        }
+
+        return ret;
+    }
+}

src/Native/System.IO.Native/nativeio.h

@@ -0,0 +1,45 @@
+//
+// Copyright (c) Microsoft. All rights reserved.
+// Licensed under the MIT license. See LICENSE file in the project root for full license information.
+//
+
+#pragma once
+
+#include <stdint.h>
+
+extern "C"
+{
+    struct FileStats
+    {
+        int32_t Flags;            // flags for testing if some members are present (see values below)
+        int32_t Mode;             // protection
+        int32_t Uid;              // user ID of owner
+        int32_t Gid;              // group ID of owner
+        int64_t Size;             // total size, in bytes
+        int64_t AccessTime;       // time of last access (atime)
+        int64_t ModificationTime; // time of last modification (mtime)
+        int64_t StatusChangeTime; // time of last status change (ctime)
+        int64_t CreationTime;     // time the file was created (birthtime)
+    };
+
+    enum
+    {
+        FILESTATS_FLAGS_NONE = 0,
+        FILESTATS_FLAGS_HAS_CREATION_TIME = 1,
+    };
+
+    /**
+     * Get file stats from a decriptor. Implemented as shim to fstat(2).
+     *
+     * Returns 0 for success, -1 for failure. Sets errno on failure.
+     */
+    int32_t GetFileStatsFromDescriptor(int32_t fileDescriptor, FileStats* output);
+
+    /**
+     * Get file stats from a full path. Implemented as shim to stat(2).
+     *
+     * Returns 0 for success, -1 for failure. Sets errno on failure.
+     */
+    int32_t GetFileStatsFromPath(const char* path, FileStats* output);
+}
+