From def16ce43f16aa21a5b1b6cb88da4c3d83a9c718 Mon Sep 17 00:00:00 2001
From: Gary Talent <gtalent2@gmail.com>
Date: Sun, 26 Jun 2016 17:54:12 -0500
Subject: [PATCH] Started on FileSystem format.

---
 CMakeLists.txt                                |  1 +
 src/ox/fs/filesystem.hpp                      | 47 +++++++++++++++++++
 src/ox/fs/test/CMakeLists.txt                 | 15 ++++--
 .../test/{format.cpp => filestore_format.cpp} |  0
 src/ox/fs/test/filesystem_format.cpp          | 22 +++++++++
 5 files changed, 81 insertions(+), 4 deletions(-)
 rename src/ox/fs/test/{format.cpp => filestore_format.cpp} (100%)
 create mode 100644 src/ox/fs/test/filesystem_format.cpp

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 0d935c7dd..39e991abc 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -13,6 +13,7 @@ if(NOT MSVC)
 		-fno-exceptions
 		-fno-rtti
 		-Wsign-compare
+		-Wunused-variable
 		#-Werror
 		#--analyze
 		#-Os # GCC size optimization flag
diff --git a/src/ox/fs/filesystem.hpp b/src/ox/fs/filesystem.hpp
index 6e9a49e39..06eb8469c 100644
--- a/src/ox/fs/filesystem.hpp
+++ b/src/ox/fs/filesystem.hpp
@@ -13,6 +13,8 @@
 namespace ox {
 namespace fs {
 
+using namespace std;
+
 struct FileStat {
 	uint64_t inode;
 	uint64_t size;
@@ -22,16 +24,42 @@ template<typename FileStore>
 class FileSystem {
 
 	private:
+		struct DirectoryEntry {
+			typename FileStore::InodeId_t inode;
+			uint8_t nameLen;
+			char name;
+		};
+
+		struct Directory {
+			/**
+			 * Number of files in this directory.
+			 */
+			typename FileStore::InodeId_t size = 0;
+
+			DirectoryEntry *files() {
+				return (DirectoryEntry*) (this + 1);
+			}
+		};
+
 		FileStore *store = nullptr;
 
 	public:
+		int mkdir(const char *path);
+
 		int read(const char *path, void *buffer);
 
 		FileStat stat(const char *path);
 
 		FileStat stat(typename FileStore::InodeId_t inode);
+
+		static uint8_t *format(uint8_t *buffer, typename FileStore::FsSize_t size);
 };
 
+template<typename FileStore>
+int FileSystem<FileStore>::mkdir(const char *path) {
+	return 0;
+}
+
 template<typename FileStore>
 FileStat FileSystem<FileStore>::stat(const char *path) {
 	FileStat stat;
@@ -47,6 +75,25 @@ FileStat FileSystem<FileStore>::stat(typename FileStore::InodeId_t inode) {
 	return stat;
 }
 
+template<typename FileStore>
+uint8_t *FileSystem<FileStore>::format(uint8_t *buffer, typename FileStore::FsSize_t size) {
+	buffer = FileStore::format(buffer, size);
+	char dirBuff[sizeof(Directory) + sizeof(Directory)];
+	Directory &dir = *((Directory*) dirBuff);
+	DirectoryEntry entry;
+	entry.inode = 2;
+	entry.name = '/';
+	entry.nameLen = 1;
+
+	if (buffer) {
+		uint32_t err;
+		FileStore fs(buffer, buffer + size, &err);
+		dir.files();
+	}
+
+	return buffer;
+}
+
 typedef FileSystem<FileStore16> FileSystem16;
 typedef FileSystem<FileStore32> FileSystem32;
 typedef FileSystem<FileStore64> FileSystem64;
diff --git a/src/ox/fs/test/CMakeLists.txt b/src/ox/fs/test/CMakeLists.txt
index c6a2a18e1..9114a83e8 100644
--- a/src/ox/fs/test/CMakeLists.txt
+++ b/src/ox/fs/test/CMakeLists.txt
@@ -1,8 +1,13 @@
 cmake_minimum_required(VERSION 2.8)
 
 add_executable(
-	Format
-		format.cpp
+	FileStoreFormat
+		filestore_format.cpp
+)
+
+add_executable(
+	FileSystemFormat
+		filesystem_format.cpp
 )
 
 add_executable(
@@ -10,8 +15,10 @@ add_executable(
 		filestoreio.cpp
 )
 
-target_link_libraries(Format OxFS OxStd)
+target_link_libraries(FileStoreFormat OxFS OxStd)
+target_link_libraries(FileSystemFormat OxFS OxStd)
 target_link_libraries(FileStoreIO OxFS OxStd)
 
-add_test("Format" Format)
+add_test("FileStoreFormat" FileStoreFormat)
+add_test("FileSystemFormat" FileSystemFormat)
 add_test("FileStoreIO" FileStoreIO)
diff --git a/src/ox/fs/test/format.cpp b/src/ox/fs/test/filestore_format.cpp
similarity index 100%
rename from src/ox/fs/test/format.cpp
rename to src/ox/fs/test/filestore_format.cpp
diff --git a/src/ox/fs/test/filesystem_format.cpp b/src/ox/fs/test/filesystem_format.cpp
new file mode 100644
index 000000000..96cd01188
--- /dev/null
+++ b/src/ox/fs/test/filesystem_format.cpp
@@ -0,0 +1,22 @@
+/*
+ * Copyright 2015 - 2016 gtalent2@gmail.com
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+#include <ox/fs/filesystem.hpp>
+
+using namespace ox::fs;
+
+template<typename FileSystem>
+int test() {
+	const auto size = 65535;
+	uint8_t volume[size];
+	FileSystem::format(volume, size);
+	return 0;
+}
+
+int main() {
+	return test<FileSystem16>() | test<FileSystem32>() | test<FileSystem64>();
+}