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LHASRC.EXE
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SLIDE_.ASM
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Assembly Source File
|
1991-03-03
|
22KB
|
1,149 lines
;***********************************************
; slide_.asm -- sliding dictionary with
; percolating update
;***********************************************
page 0, 128
include amscls.inc
$_init GEN
N = 2000h
N2 = N * 2
N4 = N * 4
MAXMATCH = 256
THRESHOLD = 3
s1 segment at 0
next label word
s1 ends
s2 segment at 0
parent dw N2 dup(?)
position dw (N + 256) dup(?)
s2 ends
s3 segment at 0
prev dw N2 dup(?)
level label byte
childcount equ level + 1
dw (N + 256) dup(?)
s3 ends
extrn error_:near
extrn fwrite_crc_:near
extrn fread_crc_:near
EncodeOption struc
output dw ?
encode_start dw ?
encode_end dw ?
EncodeOption ends
DecodeOption struc
decode_c dw ?
decode_p dw ?
decode_start dw ?
DecodeOption ends
interfacing struc
infile dw ?
outfile dw ?
original dd ?
packed dd ?
dicbit dw ?
method dw ?
blkcnt dw ?
internal dw ?
interfacing ends
TEXT segment byte public 'CODE'
extrn encode_start_fix_:near
extrn encode_start_st1_:near
extrn output_dyn_:near
extrn output_st1_:near
extrn encode_end_dyn_:near
extrn encode_end_st1_:near
extrn decode_start_dyn_:near
extrn decode_start_fix_:near
extrn decode_start_lz5_:near
extrn decode_start_lzs_:near
extrn decode_start_st0_:near
extrn decode_start_st1_:near
extrn decode_c_dyn_:near
extrn decode_c_lz5_:near
extrn decode_c_lzs_:near
extrn decode_c_st0_:near
extrn decode_c_st1_:near
extrn decode_p_dyn_:near
extrn decode_p_lz5_:near
extrn decode_p_lzs_:near
extrn decode_p_st0_:near
extrn decode_p_st1_:near
TEXT ends
DATA segment word public 'DATA'
public encode_define_
encode_define_ DW output_dyn_
DW encode_start_fix_
DW encode_end_dyn_
DW output_st1_
DW encode_start_st1_
DW encode_end_st1_
public decode_define_
decode_define_ DW decode_c_dyn_
DW decode_p_st0_
DW decode_start_fix_
DW decode_c_dyn_
DW decode_p_dyn_
DW decode_start_dyn_
DW decode_c_st0_
DW decode_p_st0_
DW decode_start_st0_
DW decode_c_st1_
DW decode_p_st1_
DW decode_start_st1_
DW decode_c_st1_
DW decode_p_st1_
DW decode_start_st1_
DW decode_c_lzs_
DW decode_p_lzs_
DW decode_start_lzs_
DW decode_c_lz5_
DW decode_p_lz5_
DW decode_start_lz5_
DATA ends
BSS segment word public 'DATA'
public encode_set_
public decode_set_
encode_set_ dw 3 dup (?)
decode_set_ dw 3 dup (?)
count_ dw 2 dup(?)
origsize_ dd 1 dup(?)
compsize_ dd 1 dup(?)
maxmatch_ dw 1 dup(?)
dicbit_ dw 1 dup(?)
unpackable_ dw 1 dup(?)
matchlen dw 1 dup(?)
matchpos dw 1 dup(?)
lastmatchlen dw 1 dup(?)
lastmatchpos dw 1 dup(?)
seg1 dw 1 dup(?)
seg2 dw 1 dup(?)
seg3 dw 1 dup(?)
avail dw 1 dup(?)
pos dw 1 dup(?)
remainder dw 1 dup(?)
dicsiz dw 1 dup(?)
dicsiz1 dw 1 dup(?)
dicsiz2 dw 1 dup(?)
dicsiz4 dw 1 dup(?)
textend dw 1 dup(?)
public maxmatch_
public count_
public matchlen
public matchpos
public lastmatchlen
public lastmatchpos
public seg1
public seg2
public seg3
public avail
public pos
public remainder
public dicbit_
public origsize_
public compsize_
public unpackable_
extrn text_:byte
extrn buf_:dword
extrn buf_limit_:word
extrn MEMOVRERR_:byte
extrn infile_:word
extrn outfile_:word
extrn crc_:word
BSS ends
CGROUP group TEXT
DGROUP group DATA, BSS
s0 equ DGROUP
HASH1 equ (13 - 8 + 1)
assume cs:TEXT, ds:DGROUP, es:nothing, ss:DGROUP
TEXT segment byte public 'CODE'
; int encode_alloc(int method)
public encode_alloc_
encode_alloc_ proc near
cld
push ds
pop es
push cx
push si
push di
push ax
mov si, offset encode_define_ + 6;
mov maxmatch_, 256
mov dicbit_, 13
mov dicsiz, 2000h
$_if <cmp ax, 1>, E
sub si, 6
mov maxmatch_, 60
dec dicbit_
shr dicsiz, 1
$_endif
mov di, offset DGROUP:encode_set_
mov cx, 3
rep movsw
$_if <cmp dicbit_, 13>, E
SEG_SIZE1 = 2000h * 3 * 2 / 16
SEG_SIZE2 = (2000h * 3 + 256) * 2 / 16
SEG_SIZE3 = (2000h * 3 + 256) * 2 / 16
mov bx, 0ffffh
mov ah, 48h ; AllocMem
int 21h
$_if <cmp bx, SEG_SIZE1 + SEG_SIZE2 + SEG_SIZE3 + 256>, AE
$_if <cmp bx, SEG_SIZE1 + SEG_SIZE2 + SEG_SIZE3 + 1024>, A
mov bx, SEG_SIZE1 + SEG_SIZE2 + SEG_SIZE3 + 1024
$_endif
mov ah, 48h ; AllocMem
int 21h
mov seg1, ax
add ax, SEG_SIZE1
mov seg2, ax
add ax, SEG_SIZE2
mov seg3, ax
add ax, SEG_SIZE3
mov word ptr buf_ + 2, ax
mov word ptr buf_, 0
sub bx, SEG_SIZE1 + SEG_SIZE2 + SEG_SIZE3
mov cl, 4
shl bx, cl
sub bx, 24
mov buf_limit_, bx
pop ax
pop di
pop si
pop cx
ret
$_endif
dec dicbit_
shr dicsiz, 1
$_endif
SEG_SIZE14 = 1000h * 4 * 2 / 16
SEG_SIZE24 = 0e20h
mov bx, SEG_SIZE14 + SEG_SIZE24
mov ah, 48h ; AllocMem
int 21h
$_if , C
mov ax, offset DGROUP:MEMOVRERR_
xor bx, bx
call error_
$_endif
mov seg1, ax
add ax, SEG_SIZE14
mov seg2, ax
add ax, 0400h
mov seg3, ax
add ax, 0620h
mov word ptr buf_ + 2, ax
mov word ptr buf_, 0
mov buf_limit_, 1e00h - 24
pop ax
$_if <cmp ax, 5>, E
dec ax
$_endif
pop di
pop si
pop cx
ret
encode_alloc_ endp
init_slide_ proc near
cld
push ds
pop ds
push cx
push dx
push di
mov es, seg3
mov di, dicsiz
mov dx, di ; dx = dicsiz
shl di, 1
mov bx, di ; bx = dicsiz * 2
mov dicsiz2, bx
lea ax, text_[bx]
mov textend, ax
add di, offset s3:level
mov cx, 256
mov ax, 1
rep stosw
mov es, seg2
mov di, bx
add di, offset s2:position
mov cx, 256
xor ax, ax
rep stosw
mov avail, 2
mov di, bx
; add di, offset s2:parent
mov cx, dx
rep stosw
mov es, seg1
shl bx, 1
mov dicsiz4, bx ; bx = dicsiz * 4
mov di, bx
; add di, offset s1:next
mov cx, N
rep stosw
; mov di, offset s1:next
mov di, ax
mov cx, dicsiz
$_do
add ax, 2
stosw
$_until <LOOP>
pop di
pop dx
pop cx
ret
init_slide_ endp
ReadBuffer:
;===============================
assume ds:s0, es:s0
;===============================
push ds
pop es
push bx
mov di, offset DGROUP:text_
mov bx, dicsiz
lea si, [di + bx]
mov bp, si
mov cx, maxmatch_
add cx, bx
shr cx, 1
rep movsw
mov ax, di
mov cx, infile_
call fread_crc_
add remainder, ax
$_if <or ax, ax>, NZ
call dispmark1_
$_endif
pop bx
mov ax, dicsiz
shl ax, 1
mov s0:pos, ax
jmp DeleteInsert
GetNextMatch proc near
;===============================
assume ds:s0, es:nothing
;===============================
dec remainder
add s0:pos, 2
inc bp
cmp bp, textend
je ReadBuffer
GetNextMatch endp
DeleteInsert proc near
DeleteNode:
public DeleteNode
;=======================================
assume ds:s0, es:nothing, ss:s0
;=======================================
push ds
mov di, s0:pos
;===============================
mov ds, s0:seg2
assume ds:s2, es:nothing
;===============================
cmp word ptr s2:[di], 0
je ToInsertNode
;===============================
mov es, s0:seg1
mov ds, s0:seg3
assume ds:s3, es:s1
;===============================
mov si, s3:[di]
mov bx, s1:[di] ; bx = s, si = r, di = p
mov s1:[si], bx
mov s3:[bx], si
xor si, si
;===============================
mov ds, s0:seg2
assume ds:s2, es:s1
;===============================
xchg si, s2:[di]
;===============================
mov es, s0:seg3
assume ds:s2, es:s3
;===============================
dec s3:childcount[si]
cmp si, dicsiz2
jae ToInsertNode
mov al, s3:childcount[si]
cmp al, 1
$_if , A
ToInsertNode:
jmp InsertNode
$_endif
mov di, s2:position[si] ; bx = s, si = r, di = t
and di, 7fffh
push di
$_if <cmp di, s0:pos>, AE
sub di, dicsiz2
$_endif
mov bx, di
mov di, s2:[si] ; bx = s, q = di
mov cx, s2:position[di] ; cx = u
$_if <or cx, cx>, S
shl cx, 1
$_do
shr cx, 1
$_if <cmp cx, s0:pos>, AE
sub cx, dicsiz2
$_endif
$_if <cmp cx, bx>, A
mov bx, cx
$_endif
mov cx, bx
or cx, dicsiz2
mov s2:position[di], cx
mov di, s2:[di]
mov cx, s2:position[di] ; cx = u
$_until <shl cx, 1>, NC
shr cx, 1
$_endif
$_if <cmp di, dicsiz2>, B
$_if <cmp cx, s0:pos>, AE
sub cx, dicsiz2
$_endif
$_if <cmp cx, bx>, A
mov bx, cx
$_endif
or bx, dicsiz2
or bx, 8000h
mov s2:position[di], bx
$_endif
pop di
mov dx, di
;===============================
mov es, s0:seg1
assume ds:s2, es:s1
;===============================
$_if <cmp word ptr s2:[di], 0>, E
$_do
mov di, s1:[di]
$_until <cmp word ptr s2:[di], 0>, NE
$_endif
$_do
mov bx, di
mov di, s2:[bx]
$_until <cmp di, si>, E
;===============================
mov ds, s0:seg3
assume ds:s3, es:s1
;===============================
mov dx, si
mov si, s3:[bx] ; si = t, bx = s
mov di, s1:[bx] ; di = u
mov s1:[si], di
mov s3:[di], si
mov si, dx
mov di, s3:[si] ; bx = s, si = r, di = t
mov s1:[di], bx
mov s3:[bx], di
mov di, s1:[si]
mov s3:[di], bx
mov s1:[bx], di
;===============================
mov ds, s0:seg2
assume ds:s2, es:s1
;===============================
if 0
xor di, di
xchg di, s2:[si]
mov s2:[bx], di
else
mov di, s2:[si]
mov s2:[bx], di
mov word ptr s2:[si], 0
endif
mov dx, s0:avail
mov s1:[si], dx
mov s0:avail, si
InsertNode:
;===============================
assume ds:s2, es:nothing
;===============================
mov dl, s0:[bp]
xor dh, dh
shl dx, 1
or dx, dicsiz2
mov ax, s0:matchlen
$_if <cmp ax, 4>, GE ; LIMITLEN
dec ax
mov si, s0:matchpos
sub si, offset s0:text_ - 1
shl si, 1
or si, dicsiz2
;===============================
mov es, s0:seg1
assume ds:s2, es:s1
;===============================
mov di, s2:[si]
$_if <or di, di>, Z
$_do
mov si, s1:[si]
mov di, s2:[si]
$_until <or di, di>, NZ
$_endif
;===============================
mov es, s0:seg3
assume ds:s2, es:s3
;===============================
$_if <cmp al, s3:level[di]>, NA
$_do
mov si, di
mov di, s2:[si]
$_until <cmp al, s3:level[di]>, A
$_endif
mov dx, di
mov bx, di
mov cx, s0:pos
$_if <cmp word ptr s2:position[bx], 0>, L
$_do
mov s2:position[bx], cx
mov bx, s2:[bx]
$_until <cmp word ptr s2:position[bx], 0>, NL
$_endif
$_if <cmp bx, dicsiz2>, B
or cx, 8000h
mov s2:position[bx], cx
$_endif
jmp MatchNext
$_endif
;===============================
assume ds:s2, es:nothing
;===============================
mov ax, 1
mov s0:matchlen, ax
InsertLoop:
;===============================
assume ds:s2, es:nothing
;===============================
mov si, ax
mov bl, s0:[bp + si]
; xor bh, bh
mov cl, HASH1
shl bx, cl
add bx, dx
and bx, N2 - 2
or bx, dicsiz4 ; bx = h, si = r, di = s
;===============================
mov es, s0:seg1
assume ds:s2, es:s1
;===============================
mov s2:parent, dx
mov si, bx
$_do
mov si, s1:[si]
$_until <cmp s2:[si], dx>, E
$_if <or si, si>, Z
;===============================
assume ds:s2, es:s1
;===============================
mov di, s0:pos
mov s2:[di], dx
mov si, di
xchg si, s1:[bx] ; bx = h, si = s, di = p
mov s1:[di], si
;===============================
mov es, s0:seg3
assume ds:s2, es:s3
;===============================
mov s3:[di], bx
mov s3:[si], di
mov di, dx
inc s3:childcount[di]
pop ds
ret
$_endif
inc ax
;===============================
assume ds:s2, es:nothing
;===============================
MatchNext:
push si ; si = r
mov cx, s0:maxmatch_
cmp si, dicsiz2
$_if , B
;===============================
mov es, s0:seg3
assume ds:s2, es:s3
;===============================
mov cl, s3:level[si]
xor ch, ch
mov si, s2:position[si] ; si = matchpos, ax = matchlen
and si, 7fffh
$_endif
;===============================
mov bx, ss
mov ds, bx
assume ds:s0, es:nothing
;===============================
shr si, 1
add si, offset s0:text_
$_if <cmp si, bp>, AE
sub si, dicsiz
$_endif
mov s0:matchpos, si
sub cx, ax
$_if ,NE
;===============================
mov es, bx
assume ds:s0, es:s0
;===============================
mov di, bp
add di, ax
add si, ax
add ax, cx
repe cmpsb
$_endif
;===============================
assume ds:s0, es:nothing
;===============================
pop si
$_if , NE
inc cx
sub ax, cx
$_endif
mov s0:matchlen, ax
jne divnode
$_if <cmp ax, maxmatch_>, NE
mov cx, s0:pos
;===============================
mov ds, s0:seg2
assume ds:s2, es:nothing
;===============================
mov s2:position[si], cx
mov dx, si
jmp InsertLoop
$_endif
;===============================
mov es, s0:seg3
assume ds:s0, es:s3
;===============================
mov di, s0:pos ; bx = t, si = r, di = p
mov bx, s3:[si]
mov s3:[di], bx
;===============================
mov ds, s0:seg1
assume ds:s1, es:s3
;===============================
mov s1:[bx], di
mov bx, s1:[si]
mov s1:[di], bx
mov s3:[bx], di
;===============================
mov es, s0:seg2
assume ds:s1, es:s2
;===============================
mov s2:[di], dx
mov word ptr s2:[si], 0
mov s1:[si], di
pop ds
ret
;===============================
assume ds:s0, es:nothing
;===============================
divnode:
mov di, s0:avail
mov cx, s0:pos
;===============================
mov es, s0:seg1
assume ds:s0, es:s1
;===============================
mov bx, s1:[di]
mov s0:avail, bx ; di = s, si = r, ax = matchlen
;===============================
mov ds, s0:seg2
assume ds:s2, es:s1
;===============================
mov s2:position[di], cx
mov s2:[di], dx
mov bl, al
mov bh, 2
;===============================
mov ds, s0:seg3
assume ds:s3, es:s1
;===============================
mov word ptr s3:level[di], bx
mov bx, s3:[si] ; di = s, si = r, bx = t
mov s3:[di], bx
mov s1:[bx], di
mov bx, s1:[si]
mov s1:[di], bx
mov s3:[bx], di
mov bx, s0:matchpos ; di = s
add bx, ax
mov bl, s0:[bx]
; xor bh, bh
mov cl, HASH1
shl bx, cl
add bx, di
and bx, N2 - 2
or bx, dicsiz4 ; bx = h, si = r, di = s
push di
if 0
mov di, si
xchg di, s1:[bx] ; di = t
mov s1:[si], di
else
mov di, s1:[bx] ; di = t
mov s1:[bx], si
mov s1:[si], di
endif
mov s3:[si], bx
mov s3:[di], si
pop di
;===============================
mov ds, s0:seg2
assume ds:s2, es:s1
;===============================
mov s2:[si], di
mov si, ax
mov bl, s0:[bp + si]
; xor bh, bh
mov cl, HASH1
shl bx, cl
add bx, di
and bx, N2 - 2
or bx, dicsiz4 ; bx = h, di = s
mov si, s0:pos ; si = pos
mov s2:[si], di ; = s
mov dx, di
;===============================
mov ds, s0:seg3
assume ds:s3, es:s1
;===============================
mov di, si
xchg di, s1:[bx]
mov s1:[si], di ; bx = h, si = pos, di = t
mov s3:[si], bx
mov s3:[di], si
pop ds
ret
DeleteInsert endp
assume ds:DGROUP, es:nothing
;=======================================
public encode_
encode_ proc near
push cx
push dx
push si
push di
push bp
push ax
mov di, ax
mov ax, infile[di]
mov infile_, ax
mov ax, outfile[di]
mov outfile_, ax
mov ax, word ptr original[di]
mov bx, word ptr original + 2[di]
mov word ptr origsize_, ax
mov word ptr origsize_ + 2, bx
mov word ptr compsize_, ax
mov word ptr compsize_ + 2, bx
xor ax, ax
mov unpackable_, ax
mov crc_, ax
call init_slide_
call word ptr encode_set_[encode_start]
mov cx, dicsiz
mov ax, cx
dec ax
mov dicsiz1, ax
mov ax, cx
add ax, maxmatch_
mov bp, offset DGROUP:text_
add bp, ax
shl ax, 1
mov pos, ax
push ds
pop es
mov bx, cx
mov di, bp
shr cx, 1
mov ax, ' '
rep stosw
mov ax, bp
mov cx, infile_
call fread_crc_
mov remainder, ax
$_if <or ax, ax>, NZ
call dispmark1_
$_endif
mov matchlen, 0
call DeleteInsert
mov ax, remainder
$_if <cmp matchlen, ax>, A
mov matchlen, ax
$_endif
$_do
$_break , <cmp remainder, 0>, E
mov ax, matchlen
mov lastmatchlen, ax
mov ax, matchpos
mov lastmatchpos, ax
call GetNextMatch
mov ax, remainder
$_if <cmp matchlen, ax>, A
mov matchlen, ax
$_endif
mov ax, lastmatchlen
$_if <cmp matchlen, ax>, A, OR
$_c <cmp ax, THRESHOLD>, B
mov al, ss:[bp - 1]
xor ah, ah
call word ptr encode_set_[output]
$_else
mov bx, bp
sub bx, lastmatchpos
sub bx, 2
and bx, dicsiz1
add ax, 256 - THRESHOLD
call word ptr encode_set_[output]
dec lastmatchlen
$_do
call GetNextMatch
$_until <dec lastmatchlen>, Z
mov ax, remainder
$_if <cmp matchlen, ax>, A
mov matchlen, ax
$_endif
$_endif
$_until <cmp unpackable_, 0>, NE
call word ptr encode_set_[encode_end]
pop di
mov ax, word ptr origsize_
mov bx, word ptr origsize_ + 2
sub ax, word ptr compsize_
sbb bx, word ptr compsize_ + 2
mov word ptr packed[di], ax
mov word ptr packed + 2[di], bx
pop bp
pop di
pop si
pop dx
pop cx
ret
encode_ endp
;=======================================
public decode_
decode_ proc near
cld
push ds
pop es
push cx
push dx
push si
push di
push bp
FILE struc
mode db ?
ptr dw ?
rcount dw ?
wcount dw ?
base dw ?
bufsiz dw ?
fd dw ?
smallbuf db ?
FILE ends
extrn _iob_:byte
extrn use_:byte
mov di, ax
mov bx, infile[di]
$_if <or bx, bx>, Z
mov bx, offset DGROUP:_iob_ + 14 * 19
mov mode[bx], 0b1h
mov ax, internal[di]
mov ptr[bx], ax
mov rcount[bx], 1000h
$_endif
mov infile_, bx
mov ax, outfile[di]
mov outfile_, ax
mov cx, dicbit[di]
mov dicbit_, cx
mov ax, 1
shl ax, cl
mov dicsiz, ax
mov ax, word ptr original[di]
mov word ptr origsize_, ax
mov ax, word ptr original + 2[di]
mov word ptr origsize_ + 2, ax
mov ax, word ptr packed[di]
mov word ptr compsize_, ax
mov ax, word ptr packed + 2[di]
mov word ptr compsize_ + 2, ax
xor ax, ax
mov count_, ax
mov count_ + 2, ax
mov crc_, ax
mov si, method[di]
mov dx, 100h - 3
$_if <cmp si, 6>, E
inc dx
$_endif
dec si
mov di, si
shl si, 1
add si, di
shl si, 1
add si, offset DGROUP:decode_define_
mov di, offset DGROUP:decode_set_
mov cx, 3
rep movsw
mov di, offset DGROUP:text_
mov cx, N
mov ax, ' '
rep stosw
call word ptr decode_set_[decode_start]
mov di, offset DGROUP:text_
mov bp, dicsiz
jmp $entry
$_while <TRUE>
$loop:
call word ptr decode_set_[decode_c]
$_if <or ah, ah>, Z
stosb
$_if <cmp di, offset DGROUP:text_[N2]>, E
mov di, offset DGROUP:text_
mov ax, di
mov bx, N2
mov cx, outfile_
call fwrite_crc_
$_endif
add word ptr count_, 1
adc word ptr count_ + 2, 0
$entry:
sub word ptr origsize_, 1
sbb word ptr origsize_ + 2, 0
dec bp
jc $endloop
jns $loop
call dispmark2_
$_else
mov cx, ax
sub cx, dx
mov ax, di
sub ax, offset DGROUP:text_
call word ptr decode_set_[decode_p]
mov si, di
sub si, ax
dec si
add word ptr count_, cx
adc word ptr count_ + 2, 0
sub bp, cx
$_if , S
call dispmark2_
$_endif
mov ax, di
add ax, cx
push cx
$_if <sub ax, offset s0:text_[N2]>, AE
sub cx, ax
rep movsb
push ax
mov di, offset DGROUP:text_
mov ax, di
mov bx, N2
mov cx, outfile_
call fwrite_crc_
pop cx
$_else
$_if <cmp si, offset s0:text_>, B
add si, N2
$_endif
$_endif
mov ax, si
add ax, cx
$_if <sub ax, offset s0:text_[N2]>, AE
sub cx, ax
rep movsb
mov cx, ax
mov si, offset s0:text_
$_endif
rep movsb
pop cx
sub word ptr origsize_, cx
sbb word ptr origsize_ + 2, 0
jc $endloop
$_endif
$_enddo
$endloop:
mov ax, offset DGROUP:text_
mov bx, di
sub bx, ax
mov cx, outfile_
call fwrite_crc_
inc bp
$_if <cmp bp, dicsiz>, NE
call dispmark2_
$_endif
pop bp
pop di
pop si
pop dx
pop cx
ret
decode_ endp
public dispmark2_
dispmark2_ proc near
add bp, dicsiz
dispmark2_ endp
public dispmark1_
dispmark1_ proc near
mov al, 'o'
jmp dispmark_
dispmark1_ endp
extrn dispmark_:near
TEXT ends
public init_slide_
public DeleteInsert
public GetNextMatch
public encode_
public decode_
end
