cmdline.equ

一个dos操作系统DRDOS的源码

;    File              : $CMDLINE.EQU$
;
;    Description       :
;
;    Original Author   : DIGITAL RESEARCH
;
;    Last Edited By    : $CALDERA$
;
;-----------------------------------------------------------------------;
;    Copyright Work of Caldera, Inc. All Rights Reserved.
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;-----------------------------------------------------------------------;
;
;    *** Current Edit History ***
;    *** End of Current Edit History ***
;
;    $Log$
;
;    ENDLOG

RL_INPUT	equ	word ptr -2[bp]		; READ_LINE Input Handle
RL_OUTPUT	equ	word ptr -4[bp]		; READ_LINE Output Handle
RL_BUFSEG	equ	word ptr -6[bp]		; Retained line Segment
RL_BUFOFF	equ	word ptr -8[bp]		; Retained line Offset
RL_BUFPTR	equ	dword ptr -8[bp]	; Retained line Buffer
RL_INICOL	equ	word ptr -10[bp]	; initial column
RL_FLAGS	equ	word ptr -12[bp]	; Control Flags
RL_MAXLEN	equ	word ptr -14[bp]	; Maximum Buffer Size
RL_KANJI	equ	word ptr -16[bp]		; Kanji Character Buffer
RL_SAVMAX	equ	word ptr -18[bp]	; Size of retained data
RL_SAVPOS	equ	word ptr -20[bp]	; Current Position in data
RL_HIST_RECL	equ	word ptr -22[bp]	; We recall from here
RL_HIST_SAVE	equ	word ptr -24[bp]	; We save to here
RL_HIST_SIZE	equ	word ptr -26[bp]	; buffer is this big
RL_HIST_SEG	equ	word ptr -28[bp]	; buffer is at this segment
RL_LENGTH	equ	28

RLF_ENHANCED	equ	0000$0001b		; Enhanced features are on
RLF_INS		equ	0000$0010b		; Insert Flag
RLF_SEARCH	equ	0000$0100b		; Search mode on
RLF_MATCH	equ	0000$1000b		; We are matching a command
RLF_RECALLED	equ	0001$0000b		; Line already recalled
RLF_DIRTY	equ	0010$0000b		; Partial line needs saved
RLF_KANJI	equ	0100$0000b		; RL_KANJI is valid
RLF_INROOT	equ	1000$0000b		; In root

CHAR_SPACE	equ	0000$0001b	; Space Character
CHAR_TAB	equ	0000$0010b	; Tab Character
CHAR_CTL	equ	0000$0100b	; Control Character expanded to "^X"
CHAR_KANJI	equ	0000$1000b	; Japanese Kanji character
CHAR_ALPHAN	equ	0001$0000b	; Alpha/Numeric
CHAR_OTHER	equ	0010$0000b	; Non AlphaNumeric
CHAR_STD	equ	1000$0000b	; Stored as a Byte displayed in 1 Col

CHAR_SIZE	equ	CHAR_STD or CHAR_KANJI or CHAR_TAB or CHAR_CTL
CHAR_ONECOL	equ	CHAR_SPACE or CHAR_OTHER or CHAR_ALPHAN