From ce607a045293b07aa99e60f29fae6b3a00a94148 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Wiesner=20Andr=C3=A1s?= <wabe@t-email.hu>
Date: Thu, 28 Sep 2023 10:00:34 +0200
Subject: [PATCH] initial

---
 CMakeLists.txt |  9 +++++++++
 embpart.c      |  7 +++++++
 embpart.h      |  6 ++++++
 mbr/mbr.c      |  7 +++++++
 mbr/mbr.h      | 24 ++++++++++++++++++++++++
 5 files changed, 53 insertions(+)
 create mode 100644 CMakeLists.txt
 create mode 100644 embpart.c
 create mode 100644 embpart.h
 create mode 100644 mbr/mbr.c
 create mode 100644 mbr/mbr.h

diff --git a/CMakeLists.txt b/CMakeLists.txt
new file mode 100644
index 0000000..fa3c453
--- /dev/null
+++ b/CMakeLists.txt
@@ -0,0 +1,9 @@
+cmake_minimum_required(VERSION 3.22)
+project(libembpart C)
+
+set(CMAKE_C_STANDARD 11)
+
+add_library(embpart embpart.c
+        mbr/mbr.c
+        mbr/mbr.h
+        ../test/main.c)
\ No newline at end of file
diff --git a/embpart.c b/embpart.c
new file mode 100644
index 0000000..f9142a2
--- /dev/null
+++ b/embpart.c
@@ -0,0 +1,7 @@
+#include "embpart.h"
+
+#include <stdio.h>
+
+void hello(void) {
+    printf("Hello, World!\n");
+}
diff --git a/embpart.h b/embpart.h
new file mode 100644
index 0000000..ea64aed
--- /dev/null
+++ b/embpart.h
@@ -0,0 +1,6 @@
+#ifndef EMBPART_EMBPART_H
+#define EMBPART_EMBPART_H
+
+#include "mbr/mbr.h"
+
+#endif //EMBPART_EMBPART_H
diff --git a/mbr/mbr.c b/mbr/mbr.c
new file mode 100644
index 0000000..9c0303c
--- /dev/null
+++ b/mbr/mbr.c
@@ -0,0 +1,7 @@
+#include "mbr.h"
+
+#define MBR_PART_TABLE_OFFSET (446)
+
+const PartEntry *mbr_get_partitions(const uint8_t *mbr_sec) {
+    return (PartEntry *)(mbr_sec + MBR_PART_TABLE_OFFSET);
+}
diff --git a/mbr/mbr.h b/mbr/mbr.h
new file mode 100644
index 0000000..1dda15e
--- /dev/null
+++ b/mbr/mbr.h
@@ -0,0 +1,24 @@
+#ifndef EMBPART_MBR_H
+#define EMBPART_MBR_H
+
+#include <stdint.h>
+
+// partition entry
+
+typedef struct {
+    uint8_t status; // partition status
+    uint8_t chsa_fa[3]; // CHS address of first absolute sector in partition
+    uint8_t part_type; // partition type
+    uint8_t chsa_la[3]; // CHS address of last absolute sector in partition
+    uint32_t lba_fa; // LBA of first absolute sector
+    uint32_t sector_count; // number of sectors the partition includes
+} PartEntry;
+
+/**
+ * Get pointer to partition table
+ * @param mbr_sec pointer to the sector containing the MBR, MUST BE DWORD ALIGNED
+ * @return pointer to first partition entry
+ */
+const PartEntry * mbr_get_partitions(const uint8_t * mbr_sec);
+
+#endif //EMBPART_MBR_H