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comm.s
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comm.s
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* comm - copmare 2 sorted file
*
* Itagaki Fumihiko 15-Jan-95 Create.
* 1.0
*
* Usage: comm [ -123bsBCZ ] [ -- ] <file1> <file2>
.include doscall.h
.include chrcode.h
.include stat.h
.xref DecodeHUPAIR
.xref issjis
.xref strlen
.xref strfor1
.xref memcmp
.xref memmovi
.xref strip_excessive_slashes
STACKSIZE equ 2048
READSIZE equ 8192
INPBUFSIZE_MIN equ 258
OUTBUF_SIZE equ 8192
CTRLD equ $04
CTRLZ equ $1A
FLAG_1 equ 0 * -1
FLAG_2 equ 1 * -2
FLAG_3 equ 2 * -3
FLAG_b equ 3 * -b
FLAG_s equ 4 * -s
FLAG_B equ 5 * -B
FLAG_C equ 6 * -C
FLAG_Z equ 7 * -Z
.text
start:
bra.s start1
dc.b '#HUPAIR',0
start1:
lea stack_bottom(pc),a7 * A7 := スタックの底
lea $10(a0),a0 * A0 : PDBアドレス
move.l a7,d0
sub.l a0,d0
move.l d0,-(a7)
move.l a0,-(a7)
DOS _SETBLOCK
addq.l #8,a7
*
move.l #-1,stdin
*
* 引数並び格納エリアを確保する
*
lea 1(a2),a0 * A0 := コマンドラインの文字列の先頭アドレス
bsr strlen * D0.L := コマンドラインの文字列の長さ
addq.l #1,d0
bsr malloc
bmi insufficient_memory
movea.l d0,a1 * A1 := 引数並び格納エリアの先頭アドレス
*
* 引数をデコードし,解釈する
*
bsr DecodeHUPAIR * 引数をデコードする
movea.l a1,a0 * A0 : 引数ポインタ
move.l d0,d7 * D7.L : 引数カウンタ
moveq #0,d5 * D5.L : フラグ
decode_opt_loop1:
tst.l d7
beq decode_opt_done
cmpi.b #'-',(a0)
bne decode_opt_done
move.b 1(a0),d0
beq decode_opt_done
subq.l #1,d7
addq.l #1,a0
move.b (a0)+,d0
cmp.b #'-',d0
bne decode_opt_loop2
tst.b (a0)+
beq decode_opt_done
subq.l #1,a0
decode_opt_loop2:
moveq #FLAG_1,d1
cmp.b #'1',d0
beq set_option
moveq #FLAG_2,d1
cmp.b #'2',d0
beq set_option
moveq #FLAG_3,d1
cmp.b #'3',d0
beq set_option
moveq #FLAG_b,d1
cmp.b #'b',d0
beq set_option
moveq #FLAG_s,d1
cmp.b #'s',d0
beq set_option
cmp.b #'B',d0
beq option_B_found
cmp.b #'C',d0
beq option_C_found
moveq #FLAG_Z,d1
cmp.b #'Z',d0
beq set_option
moveq #1,d1
tst.b (a0)
beq bad_option_1
bsr issjis
bne bad_option_1
moveq #2,d1
bad_option_1:
move.l d1,-(a7)
pea -1(a0)
move.w #2,-(a7)
lea msg_illegal_option(pc),a0
bsr werror_myname_and_msg
DOS _WRITE
lea 10(a7),a7
bra usage
option_B_found:
bclr #FLAG_C,d5
bset #FLAG_B,d5
bra set_option_done
option_C_found:
bclr #FLAG_B,d5
bset #FLAG_C,d5
bra set_option_done
set_option:
bset d1,d5
set_option_done:
move.b (a0)+,d0
bne decode_opt_loop2
bra decode_opt_loop1
decode_opt_done:
subq.l #2,d7
blo too_few_args
bhi too_many_args
*
* 標準入力を切り替える
*
clr.w -(a7) * 標準入力を
DOS _DUP * 複製したハンドルから入力し,
addq.l #2,a7
move.l d0,stdin
bmi move_stdin_done
clr.w -(a7)
DOS _CLOSE * 標準入力はクローズする.
addq.l #2,a7 * こうしないと ^C や ^S が効かない
move_stdin_done:
*
* 入力をオープン
*
movea.l a0,a1
bsr strfor1
exg a0,a1
lea file1(pc),a2
bsr open_input
movea.l a1,a0
lea file2(pc),a2
bsr open_input
*
* 出力をチェック
*
moveq #1,d0
bsr is_chrdev * キャラクタ・デバイスか?
seq do_buffering
beq check_output_done * -- block device
* character device
btst #5,d0 * '0':cooked '1':raw
bne check_output_done
* cooked character device
btst #FLAG_B,d5
bne check_output_done
bset #FLAG_C,d5 * 改行を変換する
check_output_done:
*
* 出力バッファを確保する
*
tst.b do_buffering
beq outbuf_ok
move.l #OUTBUF_SIZE,d0
move.l d0,outbuf_free
bsr malloc
bmi insufficient_memory
move.l d0,outbuf_top
move.l d0,outbuf_ptr
outbuf_ok:
*
* 入力バッファを確保する
*
move.l #$00ffffff,d0
bsr malloc
sub.l #$81000000,d0
move.l d0,d1
lsr.l #1,d1
cmp.l #INPBUFSIZE_MIN,d1
blo insufficient_memory
bsr malloc
bmi insufficient_memory
move.l d1,file1+fd_bufsize
move.l d1,file2+fd_bufsize
move.l d0,file1+fd_buftop
move.l d0,file1+fd_bufptr
add.l d1,d0
move.l d0,file2+fd_buftop
move.l d0,file2+fd_bufptr
*
* メイン処理
*
bsr comm
bsr flush_outbuf
moveq #0,d0
exit_program:
move.w d0,-(a7)
move.l stdin,d0
bmi exit_program_1
clr.w -(a7) * 標準入力を
move.w d0,-(a7) * 元に
DOS _DUP2 * 戻す.
DOS _CLOSE * 複製はクローズする.
addq.l #4,a7
exit_program_1:
DOS _EXIT2
too_many_args:
lea msg_too_many_args(pc),a0
bra werror_usage
too_few_args:
lea msg_too_few_args(pc),a0
werror_usage:
bsr werror_myname_and_msg
usage:
lea msg_usage(pc),a0
bsr werror
moveq #1,d0
bra exit_program
****************************************************************
open_input:
move.l a0,fd_pathname(a2)
cmpi.b #'-',(a0)
bne open_file
tst.b 1(a0)
bne open_file
lea msg_stdin(pc),a0
move.l stdin,d0
bra input_open
open_file:
bsr strip_excessive_slashes
clr.w -(a7)
move.l a0,-(a7)
DOS _OPEN
addq.l #6,a7
input_open:
tst.l d0
bmi open_input_fail
move.w d0,fd_handle(a2)
btst #FLAG_Z,d5
sne fd_eof_ctrlz(a2)
sf fd_eof_ctrld(a2)
bsr is_chrdev
beq input_open_1 * -- ブロック・デバイス
btst #5,d0 * '0':cooked '1':raw
bne input_open_1
st fd_eof_ctrlz(a2)
st fd_eof_ctrld(a2)
input_open_1:
clr.l fd_bufremain(a2)
sf fd_eof(a2)
rts
open_input_fail:
lea msg_open_fail(pc),a2
bsr werror_myname_word_colon_msg
moveq #2,d0
bra exit_program
****************************************************************
* comm
****************************************************************
comm:
comm_loop:
lea file1(pc),a2
bsr getline
lea file2(pc),a2
bsr getline
tst.l file1+fd_linesize
beq comm_file1_eof
tst.l file2+fd_linesize
beq comm_file2_eof
comm_compare:
movea.l file1+fd_linetop,a0
movea.l file2+fd_linetop,a1
move.l file1+fd_linesize,d0
move.l file2+fd_linesize,d1
cmp.l d0,d1
bhi compare_file1_shorter_than_file2
blo compare_file2_shorter_than_file1
bsr memcmp
bra comm_compare_1
compare_file1_shorter_than_file2:
bsr memcmp
bne comm_compare_1
bra comm_output_file1
compare_file2_shorter_than_file1:
move.l d1,d0
bsr memcmp
bne comm_compare_1
bra comm_output_file2
comm_compare_1:
blo comm_output_file1
bhi comm_output_file2
btst #FLAG_3,d5
bne comm_loop
moveq #FLAG_1,d0
bsr put_tab
moveq #FLAG_2,d0
bsr put_tab
movea.l file1+fd_linetop,a0
move.l file1+fd_linesize,d1
bsr output
btst #FLAG_b,d5
beq comm_loop
moveq #FLAG_1,d0
bsr put_tab
moveq #FLAG_2,d0
bsr put_tab
movea.l file2+fd_linetop,a0
move.l file2+fd_linesize,d1
bsr output
bra comm_loop
comm_file1_eof:
tst.l file2+fd_linesize
beq comm_done
comm_output_file2:
btst #FLAG_2,d5
bne comm_file2_next
moveq #FLAG_1,d0
bsr put_tab
movea.l file2+fd_linetop,a0
move.l file2+fd_linesize,d1
bsr output
comm_file2_next:
lea file2(pc),a2
bsr getline
tst.l file2+fd_linesize
beq comm_file2_eof
tst.l file1+fd_linesize
beq comm_output_file2
bra comm_compare
comm_file2_eof:
tst.l file1+fd_linesize
beq comm_done
comm_output_file1:
btst #FLAG_1,d5
bne comm_file1_next
movea.l file1+fd_linetop,a0
move.l file1+fd_linesize,d1
bsr output
comm_file1_next:
lea file1(pc),a2
bsr getline
tst.l file1+fd_linesize
beq comm_file1_eof
tst.l file2+fd_linesize
beq comm_output_file1
bra comm_compare
comm_done:
output_done:
rts
*****************************************************************
output:
output_loop:
subq.l #1,d1
bcs output_done
move.b (a0)+,d0
btst #FLAG_C,d5
beq output_4
cmp.b #CR,d0
bne output_3
tst.l d1
beq output_4
cmpi.b #LF,(a0)
bne output_4
bsr putc
subq.l #1,d1
move.b (a0)+,d0
bra output_4
output_3:
cmp.b #LF,d0
bne output_4
moveq #CR,d0
bsr putc
moveq #LF,d0
output_4:
bsr putc
bra output_loop
*****************************************************************
getline:
clr.l fd_linesize(a2)
getline_loop:
movea.l fd_bufptr(a2),a0
subq.l #1,fd_bufremain(a2)
bcc getc_get1
tst.b fd_eof(a2)
bne getc_eof
move.l fd_buftop(a2),d0
add.l fd_bufsize(a2),d0
sub.l a0,d0
bne getc_read
movea.l fd_buftop(a2),a0
move.l fd_linesize(a2),d0
beq getline_gb_4
movea.l fd_bufptr(a2),a1
suba.l d0,a1
cmpa.l a0,a1
beq getline_gb_3
bsr memmovi
bra getline_gb_4
getline_gb_3:
adda.l d0,a0
getline_gb_4:
move.l a0,fd_bufptr(a2)
move.l fd_buftop(a2),d0
add.l fd_bufsize(a2),d0
sub.l a0,d0
beq insufficient_memory
getc_read:
cmp.l #READSIZE,d0
bls getc_read_1
move.l #READSIZE,d0
getc_read_1:
move.l d0,-(a7)
move.l a0,-(a7)
move.w fd_handle(a2),-(a7)
DOS _READ
lea 10(a7),a7
move.l d0,fd_bufremain(a2)
bmi read_fail
tst.b fd_eof_ctrlz(a2)
beq trunc_ctrlz_done
moveq #CTRLZ,d0
bsr trunc
trunc_ctrlz_done:
tst.b fd_eof_ctrld(a2)
beq trunc_ctrld_done
moveq #CTRLD,d0
bsr trunc
trunc_ctrld_done:
subq.l #1,fd_bufremain(a2)
bcs getc_eof
getc_get1:
moveq #0,d0
move.b (a0)+,d0
move.l a0,fd_bufptr(a2)
addq.l #1,fd_linesize(a2)
cmp.b #LF,d0
bne getline_loop
getline_done:
move.l fd_bufptr(a2),d0
sub.l fd_linesize(a2),d0
move.l d0,fd_linetop(a2)
rts
getc_eof:
st fd_eof(a2)
clr.l fd_bufremain(a2)
clr.l fd_linesize(a2)
bra getline_done
read_fail:
movea.l fd_pathname(a2),a0
lea msg_read_fail(pc),a2
bsr werror_myname_word_colon_msg
bra exit_3
*****************************************************************
trunc:
move.l fd_bufremain(a2),d1
beq trunc_done
movea.l fd_bufptr(a2),a1
trunc_find_loop:
cmp.b (a1)+,d0
beq trunc_found
subq.l #1,d1
bne trunc_find_loop
trunc_done:
rts
trunc_found:
subq.l #1,a1
move.l a1,d0
sub.l a0,d0
move.l d0,fd_bufremain(a2)
trunc_eof:
st fd_eof(a2)
rts
*****************************************************************
put_tab:
btst #FLAG_s,d5
bne put_tab_return
btst d0,d5
bne put_tab_return
moveq #HT,d0
putc:
movem.l d0/a0,-(a7)
tst.b do_buffering
bne putc_buffering
move.w d0,-(a7)
move.l #1,-(a7)
pea 5(a7)
move.w #1,-(a7)
DOS _WRITE
lea 12(a7),a7
cmp.l #1,d0
bne write_fail
bra putc_done
putc_buffering:
tst.l outbuf_free
bne putc_buffering_1
bsr flush_outbuf
putc_buffering_1:
movea.l outbuf_ptr,a0
move.b d0,(a0)+
move.l a0,outbuf_ptr
subq.l #1,outbuf_free
putc_done:
movem.l (a7)+,d0/a0
put_tab_return:
rts
*****************************************************************
flush_outbuf:
movem.l d0/a0,-(a7)
tst.b do_buffering
beq flush_return
move.l #OUTBUF_SIZE,d0
sub.l outbuf_free,d0
beq flush_return
move.l d0,-(a7)
move.l outbuf_top,-(a7)
move.w #1,-(a7)
DOS _WRITE
lea 10(a7),a7
tst.l d0
bmi write_fail
cmp.l -4(a7),d0
blo write_fail
movea.l outbuf_top,a0
move.l a0,outbuf_ptr
move.l #OUTBUF_SIZE,d0
move.l d0,outbuf_free
flush_return:
movem.l (a7)+,d0/a0
rts
*****************************************************************
insufficient_memory:
lea msg_no_memory(pc),a0
bsr werror_myname_and_msg
bra exit_3
*****************************************************************
write_fail:
bsr werror_myname
lea msg_write_fail(pc),a0
bsr werror
exit_3:
moveq #3,d0
bra exit_program
*****************************************************************
werror_myname:
move.l a0,-(a7)
lea msg_myname(pc),a0
bsr werror
movea.l (a7)+,a0
rts
*****************************************************************
werror_myname_and_msg:
bsr werror_myname
werror:
movem.l d0/a1,-(a7)
movea.l a0,a1
werror_1:
tst.b (a1)+
bne werror_1
subq.l #1,a1
suba.l a0,a1
move.l a1,-(a7)
move.l a0,-(a7)
move.w #2,-(a7)
DOS _WRITE
lea 10(a7),a7
movem.l (a7)+,d0/a1
rts
*****************************************************************
werror_myname_word_colon_msg:
bsr werror_myname_and_msg
move.l a0,-(a7)
lea str_colon(pc),a0
bsr werror
movea.l a2,a0
bsr werror
movea.l (a7)+,a0
rts
*****************************************************************
is_chrdev:
move.w d0,-(a7)
clr.w -(a7)
DOS _IOCTRL
addq.l #4,a7
tst.l d0
bpl is_chrdev_1
moveq #0,d0
is_chrdev_1:
btst #7,d0
rts
*****************************************************************
malloc:
move.l d0,-(a7)
DOS _MALLOC
addq.l #4,a7
tst.l d0
rts
*****************************************************************
.data
dc.b 0
dc.b '## comm 1.0 ## Copyright(C)1995 by Itagaki Fumihiko',0
msg_myname: dc.b 'comm'
str_colon: dc.b ': ',0
msg_no_memory: dc.b 'メモリが足りません',CR,LF,0
msg_too_few_args: dc.b '引数が足りません',0
msg_too_many_args: dc.b '引数が多過ぎます',0
msg_open_fail: dc.b 'オープンできません',CR,LF,0
msg_read_fail: dc.b '入力エラー',CR,LF,0
msg_write_fail: dc.b '出力エラー',CR,LF,0
msg_stdin: dc.b '- 標準入力 -',0
msg_illegal_option: dc.b '不正なオプション -- ',0
msg_usage: dc.b CR,LF
dc.b '使用法: comm [-123bsBCZ] [--] <file1> <file2>',CR,LF,0
*****************************************************************
.offset 0
fd_pathname: ds.l 1
fd_bufsize: ds.l 1
fd_buftop: ds.l 1
fd_bufptr: ds.l 1
fd_bufremain: ds.l 1
fd_linetop: ds.l 1
fd_linesize: ds.l 1
fd_handle: ds.w 1
fd_eof: ds.b 1
fd_eof_ctrlz: ds.b 1
fd_eof_ctrld: ds.b 1
fd_pad: ds.b 1
fd_size:
.bss
.even
stdin: ds.l 1
file1: ds.l fd_size
file2: ds.l fd_size
outbuf_top: ds.l 1
outbuf_ptr: ds.l 1
outbuf_free: ds.l 1
do_buffering: ds.b 1
.even
ds.b STACKSIZE
.even
stack_bottom:
*****************************************************************
.end start