Do not display hidden files (super messy with SD cards used in Macs)

Author: mbrukner

f256/jr.asm

@@ -327,15 +327,16 @@ hw_rti
 
 puts        jmp     platform.console.puts
 
-board       .struct     id, codec
+board       .struct     id, codec, k
 mid         .byte       \id
 codec_init  .byte       \codec
+k           .byte       \k
 size        .ends
 
-boards      .dstruct    board, $02,%00000011  ; jr/mmu
-_2          .dstruct    board, $12,%00010011  ; k/mmu
-_3          .dstruct    board, $22,%00011101  ; jr2/mmu
-_4          .dstruct    board, $11,%00011111  ; k2/mmu
+boards      .dstruct    board, $02,%00000011,$00  ; jr/mmu
+_2          .dstruct    board, $12,%00010011,$01  ; k/mmu
+_3          .dstruct    board, $22,%00011101,$00  ; jr2/mmu
+_4          .dstruct    board, $11,%00011111,$01  ; k2/mmu
 boards_end  = * - boards           
 
 get_board

fat32/f256jr.s

@@ -53,7 +53,7 @@ used:   .res    1
 
         jmp     fat32_open_dir
         jmp     fat32_get_vollabel
-        jmp     fat32_read_dirent
+        jmp     fat32_read_dirent_filter_hidden
         jmp     fat32_get_free_space
         jmp     fat32_close
 

fat32/fat32.inc

@@ -26,6 +26,7 @@
 .global fat32_open_dir          ; Open directory with path in fat32_ptr
 .global fat32_read_dirent       ; Read directory entry, result in fat32_dirent
 .global fat32_read_dirent_filtered ; Same as above, but only matching names (fat32_ptr)
+.global fat32_read_dirent_filter_hidden ; Same as above, but only non-hidden files
 .global fat32_find_dirent       ; Find file with path in fat32_ptr in current directory
 
 .global fat32_chdir             ; Change to directory with path in fat32_ptr

fat32/fat32.s

@@ -2107,6 +2107,35 @@ fat32_read_dirent_filtered:
 	clc
 	rts
 
+;-----------------------------------------------------------------------------
+; fat32_read_dirent_filter_hidden
+;
+; Returns next dirent that is not a hidden file
+;
+; * c=0: failure; sets errno
+;-----------------------------------------------------------------------------
+fat32_read_dirent_filter_hidden:
+	stz fat32_errno
+
+	jsr fat32_read_dirent
+	bcc @error
+
+	cmp16_z fat32_ptr, @ok
+
+	; Check for hidden attribute (bit 1), but only for non-directories
+	lda fat32_dirent + dirent::attributes
+	bit #$10			; Is it a directory?
+	bne @ok				; Don't filter directories
+	and #$02			; Check hidden bit
+	bne fat32_read_dirent_filter_hidden	; Skip hidden files
+@ok:
+	sec
+	rts
+
+@error:
+	clc
+	rts
+
 ;-----------------------------------------------------------------------------
 ; fat32_chdir
 ;