file sys calls

src/fs.rs

@@ -0,0 +1,83 @@
+use core::ffi::CStr;
+
+use crate::sys::file;
+
+#[repr(C, packed)]
+pub struct FileCommand {
+    pub func:       u32,   // 0 = read, 1 = read folder, 2 = create/write
+    pub param1:     u32,   // offset (low)
+    pub param2:     u32,   // offset (high) or flags
+    pub param3:     u32,   // bytes to read/write
+    pub buf:        *mut u8, // pointer to buffer
+    pub path:       *const u8, // pointer to filename (ASCIIZ)
+}
+
+pub fn read_file(offset: u32, bytes_to_read: u32, buf: &mut [u8], path: *const u8) -> u32 {
+    let mut info = FileCommand {
+        func: 0,
+        param1: offset,  // file offset
+        param2: 0,  // 0
+        param3: bytes_to_read,  // number of bytes to read
+        buf: buf.as_mut_ptr(),
+        path,
+    };
+
+    unsafe {
+        file(&mut info)
+    }
+}
+
+#[repr(C, packed)]
+pub struct FolderData {
+    pub version: u32,
+    pub len: u32,
+    pub files_count: u32,
+    _reserved: [u8; 20],
+
+    blocks: [FolderDataBlock],
+}
+
+#[repr(C, packed)]
+pub struct FolderDataBlock {
+    pub attr: u32,
+    pub encoding: u32,
+    pub time_created: Time,
+    pub date_created: Date,
+    pub time_accessed: Time,
+    pub date_accessed: Date,
+    pub time_modified: Time,
+    pub date_modified: Date,
+    pub size: u64,
+    pub name: [u8; 264],
+}
+
+#[repr(C, packed)]
+pub struct Time {
+    pub seconds: u8,
+    pub minutes: u8,
+    pub hours: u8,
+    _reserved: u8,
+}
+
+#[repr(C, packed)]
+pub struct Date {
+    pub day: u8,
+    pub month: u8,
+    pub year: u16,
+    _reserved: u8,
+}
+
+pub fn read_folder(offset: u32, blocks_to_read: u32, path: *const u8, buf: &mut [u8]) -> u32 {
+    let mut info = FileCommand {
+        func: 1,
+        param1: offset,
+        param2: 0,  // encoding
+        param3: blocks_to_read,  // number of blocks to read
+        buf: buf.as_mut_ptr(),
+        path,
+    };
+
+    unsafe {
+        file(&mut info)
+    }
+}

src/func_constants.inc

@@ -9,9 +9,16 @@ SF_WAIT_EVENT           = 10
 SF_REDRAW               = 12
     SSF_BEGIN_DRAW  = 1
     SSF_END_DRAW    = 2
+SF_RD_TO_FLOPPY         = 16
 SF_GET_BUTTON           = 17
 SF_SYSTEM_GET           = 26
     SSF_SYS_LANG    = 5
+SF_CURRENT_FOLDER       = 30
+    SSF_SET_CF          = 1
+    SSF_GET_CF          = 2
+    SSF_ADD_SYS_FOLDER  = 3
+    SSF_SET_ENCODING    = 4
+    SSF_GET_ENCODING    = 5
 SF_SET_EVENTS_MASK      = 40
 SF_BOARD                = 63
     SSF_DEBUG_WRITE = 1
@@ -20,3 +27,4 @@ SF_SYS_MISC             = 68
     SSF_MEM_ALLOC   = 12
     SSF_MEM_FREE    = 13
     SSF_LOAD_DLL    = 19
+SF_FILE                  = 70

src/lib.rs

@@ -5,6 +5,7 @@ mod nanolibc;
 
 pub mod allocation;
 pub mod dll;
+pub mod fs;
 pub mod sys;
 
 pub use modules::*;

src/sys.rs

@@ -1,3 +1,5 @@
+use crate::fs::FileCommand;
+
 #[link(name = "syscalls")]
 extern "C" {
     // -1
@@ -36,6 +38,10 @@ extern "C" {
     #[link_name = "_end_window_draw"]
     pub fn end_window_draw();
 
+    // 16
+    #[link_name = "_save_rd_to_floppy"]
+    pub fn save_rd_to_floppy(floppy: u32) -> u32;
+
     // 17
     #[link_name = "_get_button_id"]
     pub fn get_button_id() -> u32;
@@ -44,6 +50,26 @@ extern "C" {
     #[link_name = "_get_lang"]
     pub fn get_lang() -> u32;
 
+    // 30.1
+    #[link_name = "_set_current_folder"]
+    pub fn set_current_folder(folder: *const u8);
+
+    // 30.2
+    #[link_name = "_get_current_folder"]
+    pub fn get_current_folder(buffer: *mut u8, len: u32) -> u32;
+
+    // 30.3
+    #[link_name = "_add_sys_folder"]
+    pub fn add_sys_folder(folder: u32);
+
+    // 30.4
+    #[link_name = "_set_folder_encoding"]
+    pub fn set_folder_encoding(folder: u32, encoding: u32);
+    
+    // 30.5
+    #[link_name = "_get_folder_encoding"]
+    pub fn get_folder_encoding(buffer: *mut u8, len: u32, encoding: *const u32) -> u32;
+
     // 40
     #[link_name = "_set_event_mask"]
     pub fn set_event_mask(mask: u32) -> u32;
@@ -67,4 +93,8 @@ extern "C" {
     // 68.19
     #[link_name = "_load_dll"]
     pub fn load_dll(name: *const u8) -> *const u32;
+
+    // 70
+    #[link_name = "_file"]
+    pub fn file(command: *const FileCommand) -> u32;
 }

src/syscalls.S

@@ -6,6 +6,7 @@ section '.text'
     public _exit
     public _start_window_draw
     public _end_window_draw
+    public _save_rd_to_floppy
     public _define_window
     public _put_pixel
     public _display_message
@@ -18,6 +19,11 @@ section '.text'
     public _alloc
     public _free
     public _get_lang
+    public _set_current_folder
+    public _get_current_folder
+    public _add_sys_folder
+    public _set_folder_encoding
+    public _get_folder_encoding
     public _load_dll
     public _set_event_mask
 
@@ -37,6 +43,12 @@ _end_window_draw:
     int 0x40
     ret
 
+_save_rd_to_floppy:
+    mov eax, SF_RD_TO_FLOPPY
+    mov ebx, [esp + 4 * 1]
+    int 0x40
+    ret
+
 _define_window:
     push edi
     push esi
@@ -130,6 +142,45 @@ _get_lang:
     int 0x40
     ret
 
+_set_current_folder:
+    mov eax, SF_CURRENT_FOLDER
+    mov ebx, SSF_SET_CF
+    mov ecx, [esp + 4 * 1]
+    int 0x40
+    ret
+
+_get_current_folder:
+    mov eax, SF_CURRENT_FOLDER
+    mov ebx, SSF_GET_CF
+    mov ecx, [esp + 4 * 1]
+    mov edx, [esp + 4 * 2]
+    int 0x40
+    ret
+
+_add_sys_folder:
+    mov eax, SF_CURRENT_FOLDER
+    mov ebx, SSF_ADD_SYS_FOLDER
+    mov ecx, [esp + 4 * 1]
+    int 0x40
+    ret
+
+_set_folder_encoding:
+    mov eax, SF_CURRENT_FOLDER
+    mov ebx, SSF_SET_ENCODING
+    mov ecx, [esp + 4 * 1]
+    mov edx, [esp + 4 * 2]
+    int 0x40
+    ret
+
+_get_folder_encoding:
+    mov eax, SF_CURRENT_FOLDER
+    mov ebx, SSF_SET_ENCODING
+    mov ecx, [esp + 4 * 1]
+    mov edx, [esp + 4 * 2]
+    mov esi, [esp + 4 * 3]
+    int 0x40
+    ret
+
 _load_dll:
     mov eax, SF_SYS_MISC
     mov ebx, SSF_LOAD_DLL
@@ -143,3 +194,8 @@ _set_event_mask:
     int 0x40
     ret
 
+_file:
+    mov eax, SF_FILE
+    mov ebx, [esp + 4 * 1]
+    int 0x40
+    ret