Added filesystem module, tests and implementation for it in emulator.

common/filesystem/filesystem.h

@@ -0,0 +1,71 @@
+#ifndef FILESYSTEM_H
+#define FILESYSTEM_H
+
+#include <stdbool.h>
+#include <stdint.h>
+
+typedef enum {
+	F_DIR=1,
+	F_RDO=2,
+	F_HID=4,
+	F_SYS=8,
+	F_ARC=16
+} FILE_ATTRIBUTES;
+
+
+typedef struct {
+	unsigned year : 7; //year from 1980 (0..127)
+	unsigned month: 4; //month (1..12)
+	unsigned day: 5; //day (1..31)
+} FILE_DATE_STRUCT;
+
+
+typedef struct {
+	unsigned hour : 5; //hour (0..23)
+	unsigned min: 6; //minute (0..59
+	unsigned sec: 5; //second/2 (0..29)
+} FILE_TIME_STRUCT;
+
+
+typedef struct {
+	uint32_t fsize;        /* File size */
+    	FILE_DATE_STRUCT fdate;        /* Last modified date */
+    	FILE_TIME_STRUCT ftime;        /* Last modified time */
+    	uint8_t fattrib;      /* Attribute */
+        char*    fname;    /* File name */
+} FILE_STRUCT;
+
+typedef struct {
+	const char* path;
+	uint16_t num_files;
+        FILE_STRUCT* files;
+} DIRECTORY_STRUCT;
+
+typedef struct {
+	const char* fname;
+	uint32_t fpos;
+        uint32_t fsize;
+} FILE_HANDLE;
+
+typedef enum {
+	F_OK,
+	F_EOF,
+        F_EACCESS,
+        F_INVALIDPARAM,
+        F_DISKERROR
+} FILE_STATUS;
+
+
+bool filesystem_init();
+
+DIRECTORY_STRUCT* filesystem_dir_open(const char* path);
+void filesystem_dir_close(DIRECTORY_STRUCT* dir);
+FILE_HANDLE* filesystem_file_open(const char* filename);
+void filesystem_file_close(FILE_HANDLE* handle);
+FILE_STATUS filesystem_file_seek(FILE_HANDLE* handle, uint32_t offset);
+FILE_STATUS filesystem_file_read(FILE_HANDLE* handle, uint8_t* buf, uint32_t size);
+FILE_STATUS filesystem_file_write(FILE_HANDLE* handle, uint8_t* buf, uint32_t size);
+
+
+#endif /* FILESYSTEM_H */
+