sh/dir: Show file sizes

applications/sh/commands/dir.asm

@@ -46,6 +46,23 @@ shell_dir_command_loop:
     mov r0, shell_dir_command_type_buffer
     call print_str_to_terminal
 
+    ; two spaces
+    mov r0, ' '
+    call print_character_to_terminal
+    call print_character_to_terminal
+
+    ; get and print the file size
+    mov r0, shell_dir_command_list_buffer
+    add r0, r3
+    movz.8 r1, [shell_current_disk]
+    mov r2, shell_dir_command_temp_file_struct
+    call open
+    cmp r0, 0
+    ifz jmp shell_dir_command_failed_to_open_file
+    mov r0, shell_dir_command_temp_file_struct
+    call ryfs_get_size
+    call print_decimal_to_terminal
+shell_dir_command_failed_to_open_file:
     ; new line
     mov r0, 10
     call print_character_to_terminal
@@ -59,8 +76,9 @@ shell_dir_command_loop:
 shell_dir_command_list_buffer: data.fill 0, 341
 shell_dir_command_file_buffer: data.fill 0, 9
 shell_dir_command_type_buffer: data.fill 0, 4
+shell_dir_command_temp_file_struct: data.fill 0, 8
 shell_dir_command_header_string:
     data.8 SET_COLOR data.8 0x20 data.8 1 ; set the color to green
-    data.str "file     type" data.8 10
+    data.str "file     type size" data.8 10
     data.8 SET_COLOR data.8 0x70 data.8 1 ; set the color to white
     data.8 0

applications/sh/main.asm

@@ -272,6 +272,38 @@ print_str_to_terminal_loop:
     pop r0
     ret
 
+print_decimal_to_terminal:
+    push r0
+    push r10
+    push r11
+    push r12
+    push r13
+    mov r10, rsp
+    mov r12, r0
+
+    push.8 0
+print_decimal_to_terminal_loop:
+    push r12
+    div r12, 10
+    pop r13
+    rem r13, 10
+    mov r11, r13
+    add r11, '0'
+    push.8 r11
+    cmp r12, 0
+    ifnz jmp print_decimal_to_terminal_loop
+print_decimal_to_terminal_print:
+    mov r0, rsp
+    call print_str_to_terminal
+
+    mov rsp, r10
+    pop r13
+    pop r12
+    pop r11
+    pop r10
+    pop r0
+    ret
+
 shell_text_buf_bottom: data.fill 0, 512
 shell_text_buf_top:
 shell_text_buf_ptr:    data.32 0 ; pointer to the current input character