Makemake crakecrake

1 files changed, 58 insertions, 0 deletions

diff --git a/inc/spec.h b/inc/spec.h
new file mode 100644
index 0000000..7991866
--- /dev/null
+++ b/inc/spec.h
@@ -0,0 +1,58 @@
+/*
+ * Copyright (c) 2021, Marvin Borner <melvix@marvinborner.de>
+ * SPDX-License-Identifier: MIT
+ */
+
+#ifndef MARFS_SPEC
+#define MARFS_SPEC
+
+#include <def.h>
+
+#define MARFS_POINT(head, tail) ((struct marfs_pointer){ (head), (tail) })
+#define MARFS_MAGIC "MarFS"
+#define MARFS_SPEC_VERSION 1
+
+#define MARFS_END 0xffffffff
+#define MARFS_NAME_LENGTH 32
+#define MARFS_ENTRY_SIZE 1024
+
+#define MARFS_DIR_ENTRY 1
+#define MARFS_FILE_ENTRY 2;
+
+#define MARFS_DIR_ENTRY_COUNT (MARFS_ENTRY_SIZE / sizeof(struct marfs_dir_entry_data))
+
+struct marfs_pointer {
+	u32 head, tail;
+} PACKED;
+
+struct marfs_header {
+	char magic[6];
+	u32 version;
+	u32 entry_size;
+	struct marfs_pointer main;
+	u8 padding[MARFS_ENTRY_SIZE - 22];
+} PACKED;
+
+struct marfs_entry_header {
+	u32 type;
+	u32 prev, next; // MARFS_END if end
+} PACKED;
+
+struct marfs_dir_entry_data {
+	char name[MARFS_NAME_LENGTH];
+	struct marfs_pointer pointer;
+} PACKED;
+
+struct marfs_dir_entry {
+	struct marfs_entry_header header;
+	struct marfs_dir_entry_data entries[MARFS_DIR_ENTRY_COUNT];
+	u8 padding[MARFS_ENTRY_SIZE - sizeof(struct marfs_entry_header) -
+		   (MARFS_DIR_ENTRY_COUNT * sizeof(struct marfs_dir_entry_data))];
+} PACKED;
+
+struct marfs_file_entry {
+	struct marfs_entry_header header;
+	u8 data[MARFS_ENTRY_SIZE - sizeof(struct marfs_entry_header)];
+} PACKED;
+
+#endif