; flat assembler
; Copyright (c) 1999-2007, Tomasz Grysztar
; All rights reserved.
struc FILEIO
{ .cmd dd ?
.offset dd ?
dd ?
.count dd ?
.buff dd ?
db ?
.name dd ?
};
struc FILEINFO
{ .attr dd ?
.flags dd ?
.cr_time dd ?
.cr_date dd ?
.acc_time dd ?
.acc_date dd ?
.mod_time dd ?
.mod_date dd ?
.size dd ?
}
;file_info_open: dd 0,0,0xffffff,0x20000,0xf0000
fullpath_open: ; db '/RD/1/EXAMPLE.ASM'
times MAX_PATH db 0
;file_info_write: dd 1,0,0,0,0xf0000
fullpath_write:; db '/RD/1/EXAMPLE'
times MAX_PATH db 0
file_info_start:
dd 7
dd 0
dd 0
dd 0
dd 0
fullpath_start: ; db '/RD/1/EXAMPLE'
times MAX_PATH db 0
file_info_debug:
dd 7
dd 0
dd fullpath_start
dd 0, 0
db '/SYS/DEVELOP/MTDBG',0
_ramdisk db '/RD/1/'
filepos dd 0x0
; info by Privalov: starting from FASM 1.51
; ~3/8 - additional memory
; ~5/8 - main memory
init_memory:
mcall 18, 16
cmp eax, 0xFFFFFFFF shr 9
jbe @f
mov eax, 0xFFFFFFFF shr 9
@@:
shl eax, 9
lea ecx, [eax+stacktop]
mcall 64, 1
mov [memory_start], stacktop
mov [additional_memory_end], ecx
sub ecx, stacktop
shr ecx, 3
lea ecx, [ecx*5+stacktop]
mov [memory_end],ecx
mov [additional_memory],ecx
ret
exit_program:
cmp [_mode],NORMAL_MODE
jne @f
mcall 64, 1, stacktop
jmp still
@@:
or eax,-1
mcall
make_timestamp:
push ebx
mcall 26,9
imul eax,10
pop ebx
ret
get_environment_variable:
mov ecx,[memory_end]
sub ecx,edi
cmp ecx,7
jb out_of_memory
cmp dword[esi],'INCL'
jne .finish
mov esi,_ramdisk
mov ecx,6
cld
rep movsb
.finish:
; stc
ret
alloc_handle:
call make_fullpaths
mov ebx, fileinfos+4
@@:
cmp dword [ebx], -1
jz .found
add ebx, 4+20+MAX_PATH
cmp ebx, fileinfos_end
jb @b
stc
ret
.found:
and dword [ebx+4], 0
and dword [ebx+8], 0
push esi edi ecx
mov esi, fullpath_open
lea edi, [ebx+20]
mov ecx, MAX_PATH
rep movsb
pop ecx edi esi
ret ; CF=0
create:
call alloc_handle
jc .ret
and dword [ebx-4], 0
mov dword [ebx], 2
.ret:
ret
open:
; call make_fullpaths
;; mov eax,fullpath_open
;; DEBUGF '"%s"\n',eax
; mov dword[file_info_open+8],-1
; mcall 58,file_info_open
; or eax,eax ; found
; jz @f
; cmp eax,6
; jne file_error
;@@: mov [filesize],ebx
; clc
; ret
;file_error:
; stc
; ret
call alloc_handle
jc .ret
mov dword [ebx], 5
and dword [ebx+12], 0
mov dword [ebx+16], fileinfo
mov eax, 70
push ebx
mcall
pop ebx
test eax, eax
jnz .fail
mov eax, [fileinfo.size]
mov [ebx-4], eax
and dword [ebx], 0
.ret:
ret
.fail:
or dword [ebx], -1 ; close handle
stc
ret
read:
; pusha
; mov edi,edx
; mov esi,[filepos]
; add esi,0x20000
; cld
; rep movsb
; popa
;; ret
mov [ebx+12], ecx
mov [ebx+16], edx
push ebx
mov eax, 70
mcall
xchg eax, [esp]
add [eax+4], ebx
adc [eax+8], dword 0
mov ebx, eax
pop eax
test eax, eax
jz .ok
cmp eax, 6
jz .ok
stc
.ok:
ret
close:
or dword [ebx], -1
ret
; ebx file handle
; ecx count of bytes to write
; edx pointer to buffer
write:
; pusha
; mov [file_info_write+8],ecx
; mov [file_info_write+12],edx
; mov [filesize],edx
; mov eax,58
; mov ebx,file_info_write
; mcall
; popa
; ret
mov [ebx+12], ecx
mov [ebx+16], edx
push ebx
mov eax, 70
mcall
xchg eax, [esp]
add [eax+4], ebx
adc [eax+8], dword 0
mov ebx, eax
pop eax
mov byte [ebx], 3
cmp eax, 1
cmc
ret
make_fullpaths:
pusha
push edx
mov esi,path ; open
; DEBUGF " '%s'",esi
mov edi,fullpath_open
cld
newc1:
movsb
cmp byte[esi],0;' '
jne newc1
mov esi,[esp]
cmp byte[esi],'/'
jne @f
mov edi,fullpath_open
@@:
lodsb
stosb
cmp al,0
jne @b
; mov ecx,12
; cld
; rep movsb
; mov byte[edi],0
mov esi,path ; write
mov edi,fullpath_write
cld
newc2:
movsb
cmp byte[esi],0;' '
jne newc2
mov esi,[esp]
cmp byte[esi],'/'
jne @f
mov edi,fullpath_write
@@:
lodsb
stosb
cmp al,0
jne @b
; mov ecx,12
; cld
; rep movsb
; mov byte[edi],0
mov esi,path ; start
mov edi,fullpath_start
cld
newc3:
movsb
cmp byte[esi],0;' '
jne newc3
; mov esi,[esp]
pop esi
cmp byte[esi],'/'
jne @f
mov edi,fullpath_start
@@:
lodsb
stosb
cmp al,0
jne @b
; mov ecx,12
; cld
; rep movsb
; mov byte[edi],0
; add esp,4
popa
ret
lseek:
cmp al,0
jnz @f
and dword [ebx+4], 0
and dword [ebx+8], 0
@@: cmp al,2
jnz @f
mov eax, [ebx-4]
mov [ebx+4], eax
and dword [ebx+8], 0
@@: add dword [ebx+4], edx
adc dword [ebx+8], 0
ret
display_character:
pusha
cmp [_mode],NORMAL_MODE
jne @f
cmp dl,13
jz dc2
cmp dl,0xa
jnz dc1
and [textxy],0x0000FFFF
add [textxy], 7 shl 16 +53 and 0xFFFF0000 + 10
dc2:
popa
ret
dc1:
mov eax,[textxy]
cmp ax,word[bottom_right]
ja dc2
shr eax,16
cmp ax,word[bottom_right+2]
ja dc2
mov [dc],dl
mcall 4,[textxy],[sc.work_text],dc,1
add [textxy],0x00060000
popa
ret
@@:
mov eax,63
mov ebx,1
mov cl,dl
mcall
popa
ret
display_string:
pusha
@@:
cmp byte[esi],0
je @f
mov dl,[esi]
call display_character
add esi,1
jmp @b
@@:
popa
ret
display_number:
push ebx
mov ecx,1000000000
xor edx,edx
xor bl,bl
display_loop:
div ecx
push edx
cmp ecx,1
je display_digit
or bl,bl
jnz display_digit
or al,al
jz digit_ok
not bl
display_digit:
mov dl,al
add dl,30h
push ebx ecx
call display_character
pop ecx ebx
digit_ok:
mov eax,ecx
xor edx,edx
mov ecx,10
div ecx
mov ecx,eax
pop eax
or ecx,ecx
jnz display_loop
pop ebx
ret
display_user_messages:
; push [skinh]
; pop [textxy]
; add [textxy], 7 shl 16 +53
mov [displayed_count],0
call flush_display_buffer
cmp [displayed_count],1
jb line_break_ok
je make_line_break
mov ax,word[last_displayed]
cmp ax,0A0Dh
je line_break_ok
cmp ax,0D0Ah
je line_break_ok
make_line_break:
mov esi,lf
call display_string
line_break_ok:
ret
display_block:
pusha
@@: mov dl,[esi]
call display_character
inc esi
loop @b
popa
ret
fatal_error:
mov esi,error_prefix
call display_string
pop esi
call display_string
mov esi,error_suffix
call display_string
mov esi,lf
call display_string
mov al,0FFh
jmp exit_program
assembler_error:
call display_user_messages
push dword 0
mov ebx,[current_line]
get_error_lines:
push ebx
test byte [ebx+7],80h
jz display_error_line
mov edx,ebx
find_definition_origin:
mov edx,[edx+12]
test byte [edx+7],80h
jnz find_definition_origin
push edx
mov ebx,[ebx+8]
jmp get_error_lines
display_error_line:
mov esi,[ebx]
call display_string
mov esi,line_number_start
call display_string
mov eax,[ebx+4]
and eax,7FFFFFFFh
call display_number
mov dl,']'
call display_character
pop esi
cmp ebx,esi
je line_number_ok
mov dl,20h
call display_character
push esi
mov esi,[esi]
movzx ecx,byte [esi]
inc esi
call display_block
mov esi,line_number_start
call display_string
pop esi
mov eax,[esi+4]
and eax,7FFFFFFFh
call display_number
mov dl,']'
call display_character
line_number_ok:
mov esi,line_data_start
call display_string
mov esi,ebx
mov edx,[esi]
call open
mov al,2
xor edx,edx
call lseek
mov edx,[esi+8]
sub eax,edx
push eax
xor al,al
call lseek
mov ecx,[esp]
mov edx,[additional_memory]
lea eax,[edx+ecx]
cmp eax,[additional_memory_end]
ja out_of_memory
call read
call close
pop ecx
mov esi,[additional_memory]
get_line_data:
mov al,[esi]
cmp al,0Ah
je display_line_data
cmp al,0Dh
je display_line_data
cmp al,1Ah
je display_line_data
or al,al
jz display_line_data
inc esi
loop get_line_data
display_line_data:
mov ecx,esi
mov esi,[additional_memory]
sub ecx,esi
call display_block
mov esi,cr_lf
call display_string
pop ebx
or ebx,ebx
jnz display_error_line
mov esi,error_prefix
call display_string
pop esi
call display_string
mov esi,error_suffix
call display_string
jmp exit_program
align 4
fileinfo FILEINFO
character db ?,0
bytes_count dd ?
textxy dd 0x000500A0
dc db 0x0
filesize dd 0x0
displayed_count dd ?
last_displayed rb 2
error_prefix db 'error: ',0
error_suffix db '.',0
line_data_start db ':'
cr_lf db 0Dh,0Ah,0
line_number_start db ' [',0
macro dm string { db string,0 }