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Assembly Source File | 1989-08-30 | 94.4 KB | 1,919 lines

;-----------------------------------------------------------------------------; ; DIRMATCH * PC Magazine * Michael J. Mefford ; ; Points out the similarity and differences of two directories and then ; ; lets you update the target directory with specific source directory files. ; ;-----------------------------------------------------------------------------; _TEXT SEGMENT PUBLIC 'CODE' ASSUME CS:_TEXT,DS:_TEXT,ES:_TEXT,SS:_TEXT ORG 100H START: JMP MAIN ; DATA AREA ; --------- SIGNATURE DB CR,SPACE,SPACE,SPACE,CR,LF COPYRIGHT DB "DIRMATCH 1.0 (C) 1989 Ziff Communications Co. ",CR,LF PROGRAMMER DB "PC Magazine ",BOX," Michael J. Mefford",CR,LF,LF DB "Syntax: DIRMATCH source target [/D][/A]",CR,LF,LF DB "/D = Different files",CR,LF DB "/A = Alike files$",CTRL_Z TAB EQU 9 CR EQU 13 LF EQU 10 CTRL_Z EQU 26 SPACE EQU 32 BOX EQU 254 VERT_LINE EQU 179 FF EQU 12 SHIFT_KEYS EQU 3 LITTLE_ARROW EQU 26 ESC_SCAN EQU 1 Y_SCAN EQU 15H N_SCAN EQU 31H NOTE EQU 1046 ; C SPEC_LENGTH EQU 66 + 12 MENU LABEL BYTE DB "F1 ",0, "All files ",0, "Different files ",0, "Alike files ",0 DB "F2 Mark all F3 Clear marks F4 CopyF5 Move F6 Print " DB "Use: ",24,32,25," PgUp PgDn Home End +/- Mark/Unmark Esc to Exit",0 ALL EQU 0 UNIQUE EQU 2 ALIKE EQU 4 FILES_MODE DB ALL MODES DW DO_ALL, DO_UNIQUE, DO_ALIKE CRT_MODE EQU 49H CRT_ROWS EQU 84H STATUS_REG DW 3BAH VIDEO_SEG DW 0B000H ROWS DB 24 SYNTAX_FLAG DB 0 HEADING_ATTR DB 70H ACTIVE_ATTR DB 0FH BODY_ATTR DB 07H HIGHLIGHT_ATTR DB 0FH MENU_ATTR DB 07H BAR_ATTR DB 70H INTENSE EQU 7FH INTENSE_BLUE EQU 1FH BLUE EQU 17H INVERSE_BLUE EQU 71H CYAN EQU 31H TOP_MEMORY DW ? DEFAULT_DRIVE DB ? SOURCE_SEG DW ? TARGET_SEG DW ? BUFFER_SEG DW ? BUFFER_SIZE DW 0FFFFH SOURCE_END DW ? TARGET_END DW ? LISTING_LINE DW 0 BAR_LINE DW 0 LAST_BAR DW ? PAGE_LENGTH DW ? SOURCE_COUNT DW ? TARGET_COUNT DW ? MARKED_COUNT DW ? RESPONSE DW ? OUT_OF_MEMORY DB "Not enough memory ",0,"$" TOO_MANY DB "Too many files ",0,"$" SOURCE_PROMPT DB CR,LF,LF,"Source$" TARGET_PROMPT DB CR,LF,LF,"Target$" NOT_FOUND DB " filespec not found",CR,LF DB "Enter filespec: $" PRESS_MSG DB "Error; Press any key",0 SOURCE_MSG DB " Source",0 DIRECTORY_MSG DB " Directory",0 FILES_MSG DB " files",0 GAP EQU 4 DIRECTORY_LEN EQU $ - SOURCE_MSG + GAP - 3 TO_MSG DB " to" TARGET_MSG DB " Target",0 COPY_MSG DB "Copy ",0 MOVE_MSG DB "Move ",0 MARKED_MSG DB " marked files",0 QUERY_MSG DB "? Y/N ",0 STAR_DOT_STAR DB "*.*",0 RECENT DB ">", 6 DUP (?) NOT_RECENT DB SPACE, 6 DUP (?) DISPATCH_KEY DB 48H, 50H, 49H, 51H, 47H, 4FH DB 3BH, 54H, 3CH, 3DH, 3EH, 3FH DB 40H, 01H, 0DH, 4EH, 0CH, 4AH DISPATCH_CNT EQU $ - DISPATCH_KEY DISPATCH_TABLE DW UP, DOWN, PGUP, PGDN, HOME, END_KEY DW F1, S_F1, F2, F3, F4, F5 DW F6, EXIT, PLUS, PLUS, MINUS, MINUS DISPATCH_END EQU $ - 2 MATCHING STRUC RESERVED DB 21 DUP (?) ATTRIBUTE DB ? FILE_TIME DW ? FILE_DATE DW ? SIZE_LOW DW ? SIZE_HIGH DW ? FILE_NAME DB 13 DUP (?) MATCHING ENDS FILE_RECORD STRUC LIST_NAME DB 12 DUP (?) LIST_BYTES DB 9 DUP (?) LIST_DATE DB 10 DUP (?) LIST_TIME DB 8 DUP (?) MARK DB ? DOS_DATE DW ? DOS_TIME DW ? DISP_ORDER DW ? FILE_RECORD ENDS ; CODE AREA ; --------- MAIN PROC NEAR CLD ;String instructions forward. MOV BX,0FFFFH ;Memory allocation request will MOV AH,4AH ; fail and BX will return with INT 21H ; available memory in ; paragraphs. CMP BX,64 * (1024 / 16) ;At least 64K paragraphs? JAE ALLOCATE MOV DX,OFFSET OUT_OF_MEMORY JMP ERROR_EXIT ;If no, exit. ALLOCATE: MOV AH,4AH ;Else, allocate all available. INT 21H MOV AX,DS ;Get our segment; ADD AX,BX ; add to available and save MOV TOP_MEMORY,AX ; as segment of memory top. MOV SP,OFFSET STACK_POINTER ;Set up stack. MOV DX,OFFSET DTA ;Set up Disk Transfer Address. MOV AH,1AH INT 21H MOV AH,19H ;Get default drive so can INT 21H ; restore after we change it. MOV DEFAULT_DRIVE,AL ;----------------------------------------------; CK_SWITCH: MOV SI,81H ;Point to command line. NEXT_SWITCH: LODSB ;Get a byte. CMP AL,CR ;Is it carriage return? JZ PARSE_SOURCE ;If yes, done here. CMP AL,"/" ;Is it switch delimiter? JNZ NEXT_SWITCH ;If no, next byte. LODSB ;Get the switch character. CMP AL,CR ;Make sure it's not CR JZ PARSE_SOURCE ; so we don't go past end. AND AL,5FH ;Capitalize. CK_UNIQUE: CMP AL,"D" ;If "D", then Different files. JNZ CK_ALIKE MOV FILES_MODE,UNIQUE CK_ALIKE: CMP AL,"A" ;If "A", then Alike files. JNZ NEXT_SWITCH ;If none of these, next byte. MOV FILES_MODE,ALIKE JMP NEXT_SWITCH ;---------------------------------------------------------------; ; Parse the command line for filespecs. If one or both missing ; ; or file can't be opened, prompt the user for filespec. ; ;---------------------------------------------------------------; PARSE_SOURCE: MOV SI,81H ;Point to command line again. CALL PARSE_SPEC ;Parse a filespec. PUSH [SI] ;Save ending byte PUSH SI ; and the pointer. JNZ SOURCE_PATH ;If filespec found, check path. PROMPT1: XOR DI,DI ;Else, ask user for first CALL PROMPT_USER ; filespec. CALL PARSE_SPEC ;Parse it. JZ PROMPT1 ;If null string, prompt again. SOURCE_PATH: MOV DI,OFFSET SOURCE_SPEC ;Storage for complete filespec. CALL FIND_PATH ;Parse the path from filespec. JC PROMPT1 ;If not found, prompt user. MOV SOURCE_END,SI ;Else, store source path end. MOV BP,ES ;Calculate the segment to save MOV DI,OFFSET SOURCE_OFFSET ; first batch of filenames. CALL CALC_SEG MOV SOURCE_SEG,BP ;Save it. CALL SOURCE_DIR JC ERROR_EXIT ;If ran out of memory, exit. POP SI ;Recover command line pointer POP [SI] ; and restore string ; terminator. PARSE_TARGET: CALL PARSE_SPEC ;Parse for second filespec. JNZ TARGET_PATH ;If not null string, check ; path. PROMPT2: MOV DI,1 ;Else, prompt user for second CALL PROMPT_USER ; filespec and then parse it. JMP PARSE_TARGET TARGET_PATH: MOV DI,OFFSET TARGET_SPEC ;Storage for complete filespec. CALL FIND_PATH ;Parse path from filespec. JC PROMPT2 ;If not found, prompt user. MOV TARGET_END,SI ;Else, save target path end. CALL TARGET_DIR ;Get target files. JC ERROR_EXIT DO_SETUP: CALL VIDEO_SETUP ;Prepare for video environment. CALL MATCH ;Match the filenames. ;----------------------------------------------------------; ; Loop here processing user commands and updating display. ; ;----------------------------------------------------------; INPUT: CALL DISP_LISTINGS ;Update the display. CALL GET_KEY MOV DI,OFFSET DISPATCH_KEY ;Check dispatch table. MOV CX,DISPATCH_CNT REPNZ SCASB JNZ INPUT ;If no match, ignore. SHL CX,1 ;Else, look up subroutine MOV DI,OFFSET DISPATCH_END SUB DI,CX MOV BP,BAR_LINE ;Paging commands need line MOV BX,LISTING_LINE ; page data. MOV CX,LAST_BAR MOV DX,PAGE_LENGTH CALL [DI] ;Process the command. JMP INPUT ;Next input. ;----------------------------------------------; ERROR_EXIT: CALL PRINT_STRING ;Print error message. ERROR: MOV AL,1 ;Exit with ERRORLEVEL one. JMP SHORT TERMINATE EXIT: MOV DH,ROWS ;Clear last two lines. MOV CH,DH DEC CH XOR CL,CL MOV DL,80 - 1 MOV BH,MENU_ATTR MOV AX,600H ; by scrolling active page. INT 10H XOR BX,BX ;Border back to black. MOV AH,0BH INT 10H MOV DH,CH ;Place cursor on next DEC DH ; to last line. XOR DL,DL CALL SET_CURSOR XOR AL,AL ;ERRORLEVEL zero. TERMINATE: MOV AH,4CH ;Terminate. INT 21H MAIN ENDP ; *************** ; * SUBROUTINES * ; *************** ;-------------------------------------------------; SOURCE_DIR: MOV BP,SOURCE_SEG MOV DX,OFFSET SOURCE_SPEC CALL FIND_FILES ;Find the filenames. JC GET_END1 CALL CALC_SEG ;If successful, calculate ; segment of target DIR MOV TARGET_SEG,BP ; filename storage. CLC GET_END1: RET ;-------------------------------------------------; ; OUTPUT: CY = 1 if failed; DX -> Error message. ; ;-------------------------------------------------; TARGET_DIR: MOV BP,TARGET_SEG ;Retrieve segment for ; filenames. MOV DX,OFFSET TARGET_SPEC CALL FIND_FILES ;Find the filenames. JC GET_END2 ;If ran out of memory, exit. CALL CALC_SEG ;If successful, calculate MOV BUFFER_SEG,BP ; segment of copy buffer. MOV AX,TOP_MEMORY ;Retrieve top of memory ; segment. SUB AX,BP ;Paragraphs available for ; buffer. MOV DX,OFFSET OUT_OF_MEMORY JBE GET_END2 ;If none, exit. CMP AX,80H ;If less than practical minimum JB GET_END2 ; of 2K bytes (128 para), exit. CMP AX,1000H ;If more than 4K paragraphs JAE GET_END2 ; (64K bytes), then use ; default. MOV CL,4 ;Else, convert paragraphs to SHL AX,CL ; bytes and save as buffer MOV BUFFER_SIZE,AX ; size. CLC GET_END2: RET ;----------------------------------------------; MATCH: MOV BAR_LINE,0 MOV LISTING_LINE,0 ;Move listing to top. DO_MATCH: PUSH DS ;Preserve segments. PUSH ES MOV SOURCE_COUNT,0 MOV TARGET_COUNT,0 ;Initialize file counts to ; zero. MOV DL,FILES_MODE ;Get offset of current XOR DH,DH ; file display mode. ADD DX,OFFSET MODES MOV ES,TARGET_SEG ;Target listing segment. MOV DS,SOURCE_SEG ;Source listing segment. XOR BX,BX ;DS:BX -> source. XOR BP,BP ;ES:BP -> target. XOR AX,AX ;Counter. NEXT_MATCH: CMP BYTE PTR ES:LIST_NAME[BP],-1 ;End of listing 2? JNZ COMPARE ;If no, compare ; filenames. CMP BYTE PTR LIST_NAME[BX],-1 ;Else, end of listing 1? JZ MATCH_END ;If yes, done here. COMPARE: MOV SI,BX ;Get pointers to filenames. MOV DI,BP MOV CX,SIZE LIST_NAME REP CMPSB ;Compare the names. MOV DI,DX CALL CS:[DI] ;Process. JMP NEXT_MATCH ;Do next match. MATCH_END: POP ES ;Restore segments. POP DS DEC AX ;Adjust counter. JGE STORE_BAR ;If non-zero, OK. XOR AX,AX ;Else, use zero. STORE_BAR: MOV LAST_BAR,AX ;Last bar location = count. CALL DISPLAY_DIRS ;Update the directory file ; count. RET ;----------------------------------------------; DO_ALL: MOV SI,AX ;Current counter. MOV DI,AX JZ ALL_MATCH ;If name same, check date. JB ALL_LEFT2 ;Else, update the one CALL UPDATE_LIST2 ; earlier in the alphabet JMP SHORT ALL_END ; with current display order. ALL_MATCH: CALL DO_DATE JB ALL_LEFT1 JA ALL_RIGHT1 OR DI,8000H ;Highlight flag. ALL_RIGHT1: OR SI,8000H JMP SHORT ALL_UPDATE ALL_LEFT1: OR DI,8000H ALL_UPDATE: CALL UPDATE_LIST2 ALL_LEFT2: CALL UPDATE_LIST1 ALL_END: INC AX ;Increment counter. RET ;----------------------------------------------; DO_UNIQUE: MOV SI,AX MOV DI,AX JZ UNIQUE_MATCH ;If match, check date. JA UNIQUE_RIGHT ;Else, update the one INC AX ; earlier in the alphabetic JMP SHORT UNIQUE_LEFT ; with current display order. UNIQUE_RIGHT: INC AX CALL UPDATE_LIST2 JMP SHORT UNIQUE_END UNIQUE_MATCH: CALL DO_DATE JB UNIQUE_LEFT1 JA UNIQUE_RIGHT1 MOV SI,-1 ;Non-display flag. MOV DI,-1 JMP SHORT UNIQUE_UPDATE UNIQUE_RIGHT1: OR SI,8000H ;Highlight flag. JMP SHORT UNIQUE_DATE UNIQUE_LEFT1: OR DI,8000H UNIQUE_DATE: INC AX UNIQUE_UPDATE: CALL UPDATE_LIST2 UNIQUE_LEFT: CALL UPDATE_LIST1 UNIQUE_END: RET ;----------------------------------------------; DO_ALIKE: MOV SI,AX MOV DI,AX JZ ALIKE_MATCH ;If match, then check date. MOV SI,-1 JB ALIKE_LEFT MOV DI,-1 ;Else, update the one earlier CALL UPDATE_LIST2 ; in the alphabet with a -1 JMP SHORT ALIKE_END ; non-display flag. ALIKE_MATCH: INC AX CALL DO_DATE JB ALIKE_LEFT1 JA ALIKE_RIGHT1 OR DI,8000H ALIKE_RIGHT1: OR SI,8000H JMP SHORT ALIKE_UPDATE ALIKE_LEFT1: OR DI,8000H ALIKE_UPDATE: CALL UPDATE_LIST2 ALIKE_LEFT: CALL UPDATE_LIST1 ALIKE_END: RET ;-----------------------------------------------------------------------------; ; INPUT: BX -> Source name; BP -> target name; OUTPUT: ZF = 1 if date matched. ; ;-----------------------------------------------------------------------------; DO_DATE: PUSH SI PUSH DI MOV SI,BX ;Get filename pointers again. MOV DI,BP ADD SI,DOS_DATE ;Point to date/time in DOS ADD DI,DOS_DATE ; format and compare. MOV CX,(SIZE DOS_DATE + SIZE DOS_TIME) / 2 REP CMPSW POP DI POP SI RET ;----------------------------------------------; UPDATE_LIST1: MOV DISP_ORDER[BX],SI ;Store the display order value. ADD BX,SIZE FILE_RECORD ;Point to next filename. INC SI ;Is it -1, non-display marker? JZ LIST1_END ;If yes, done here. INC CS:SOURCE_COUNT ;Else, increment file count. LIST1_END: RET UPDATE_LIST2: MOV ES:DISP_ORDER[BP],DI ;Same for the second batch of ADD BP,SIZE FILE_RECORD ; of filenames. INC DI ;Is it -1, non-display marker? JZ LIST2_END ;If yes, done here. INC CS:TARGET_COUNT ;Else, increment file count. LIST2_END: RET ;----------------------------------------------; DISP_LISTINGS: PUSH DS ;Preserve data segment. PUSH SI MOV BP,LISTING_LINE ;1st line of listing to ; display. MOV CX,PAGE_LENGTH ;No. of lines to display. XOR SI,SI ;SI -> start of source. XOR DX,DX ;DX -> start of target. MOV DI,(3 * 160) ;Start display row 2; column 1. NEXT_LIST: PUSH CX ;Preserve lines to display. MOV DS,CS:SOURCE_SEG ;1st in left half of screen. MOV CX,40 ;39 chars in filename plus ; mark. PUSH DX ;Preserve DX. CALL DO_LIST ;Display the left half of line. POP DX ;Restore DX. XCHG SI,DX ;Now point to target filename. MOV DS,CS:TARGET_SEG ;Also need the segment. INC DI ;Bump pointer to next line. INC DI MOV CX,39 ;It is 39 chars too. PUSH DX ;Preserve DX. CALL DO_LIST ;Display the right half of ; line. POP DX ;Restore DX. XCHG SI,DX ;Restore pointers. INC BP ;Next order counter. POP CX ;Retrieve line counter. LOOP NEXT_LIST ;Do all lines. POP SI POP DS ;Restore data segment. RET ;Done here. ;---------------------------------------------------------------; ; INPUT: DS:SI -> filename to display; Entry point at DO_LIST. ; ;---------------------------------------------------------------; NEXT_REC1: ADD SI,SIZE FILE_RECORD ;Next filename. DO_LIST: MOV BH,CS:BODY_ATTR ;Assume body attribute. CMP LIST_NAME[SI],-1 ;Is this end of listing? JZ PAD_LINE ;If yes, pad line with spaces. MOV AX,DISP_ORDER[SI] ;Retrieve display order. CMP AX,-1 ;Should it be displayed? JZ NEXT_REC1 ;If no, next record. TEST AX,8000H ;Highlight bit? JZ COMPARE_ORDER ;If no, use body attribute. MOV BH,CS:HIGHLIGHT_ATTR ;Else, highlight. AND AX,NOT 8000H ;Strip highlight bit. COMPARE_ORDER: CMP AX,BP ;Else, entry less than order? JB NEXT_REC1 ;If yes, next record. JA PAD_LINE ;If above, pad with spaces. CMP CX,40 ;Is this the source directory? JNZ DO_CHAR2 ;If no, skip mark field. MOV AL,MARK[SI] ;Else, retrieve mark. CALL WRITE_SCREEN ;Write it to display. DEC CX ;Adjust count acting as flag. CMP CS:BAR_LINE,BP ;Is this the bar line? JNZ DO_CHAR2 ;If no, write the line. PUSH BX ;Else, preserve attribute. MOV BH,CS:BAR_ATTR ;Retrieve bar attribute. MOV CX,SIZE LIST_NAME ;Write name with bar attribute. DO_CHAR1: LODSB CALL WRITE_SCREEN LOOP DO_CHAR1 POP BX ;Retrieve display attribute. MOV CX,39 - SIZE LIST_NAME ;Rest of name. DO_CHAR2: LODSB ;Display the filename. CALL WRITE_SCREEN LOOP DO_CHAR2 ADD SI,7 ;Past date/time/order/mark JMP SHORT DO_LIST_END ; fields. PAD_LINE: CMP CX,40 ;Is this source directory? JNZ DO_PAD2 ;If no, just write spaces. MOV AL,SPACE ;Else, write one space as mark. CALL WRITE_SCREEN DEC CX ;Adjust counter flag. CMP CS:BAR_LINE,BP ;Is this the bar line? JNZ DO_PAD2 ;If no, write line. PUSH BX ;Else, display bar and MOV BH,CS:BAR_ATTR ; then rest of blank line. MOV CX,SIZE LIST_NAME DO_PAD1: MOV AL,SPACE CALL WRITE_SCREEN LOOP DO_PAD1 POP BX MOV CX,39 - SIZE LIST_NAME DO_PAD2: MOV AL,SPACE CALL WRITE_SCREEN LOOP DO_PAD2 DO_LIST_END: RET ;-------------------------------------------------------------------------; ; INPUT: SI -> string to parse. ; ; OUTPUT: BP -> filespec start; SI -> filespec end; BX -> filename start. ; ; ZF = 1 if null string. ; ;-------------------------------------------------------------------------; PARSE_SPEC: LODSB ;Get a byte. CMP AL,SPACE ;Is it a space char or below? JA LEADING_END ;If no, found start. CMP AL,CR ;Is it carriage return? JNZ PARSE_SPEC ;If no, get next byte. LEADING_END: DEC SI ;Adjust pointer to string ; start. MOV BP,SI ;Save start of filespec. MOV BX,SI ;Use BX as filename start ; pointer FIND_END: LODSB ;Get a byte. CMP AL,":" ;Is it a drive delimiter? JNZ CK_SLASH ;If no, check path delimiter. MOV DL,[SI-2] ;Else, retrieve drive ; specifier. AND DL,5FH ;Capitalize. SUB DL,"A" ;Convert to DOS format. MOV AH,0EH ;Change drive. INT 21H MOV BX,SI ;Save as filename start. MOV AH,19H ;Get current disk. INT 21H CMP AL,DL ;Was it a valid disk request? JZ FIND_END ;If yes, continue parsing. FIND_DELIMIT: LODSB ;Else, find delimiter CMP AL,SPACE JA FIND_DELIMIT DEC SI MOV BP,SI ; and emulate null string. JMP SHORT PARSE_END CK_SLASH: CMP AL,"\" ;Is it a path delimiter? JNZ CK_DELIMITER ;If no, check switch character. MOV BX,SI ;Else, save as filename start. CK_DELIMITER: CMP AL,"/" ;Is it a switch delimiter? JZ FOUND_END ;If yes, end of filespec. CMP AL,SPACE ;Is it above space character? JA FIND_END ;If yes, continue until find ; end. FOUND_END: DEC SI ;Adjust. PUSH SI MOV SI,OFFSET CURRENT_DIR ;Get default directory. CALL GET_DIR POP SI PARSE_END: CMP BP,SI ;Any filespec? RET ;Return result to caller. ;-----------------------------------------------------------; ; INPUT: DI = 0 for first prompt, DI = 1 for second prompt ; ; OUTPUT: SI -> string start. ; ;-----------------------------------------------------------; PROMPT_USER: CMP SYNTAX_FLAG,1 ;If first time through, display JZ PROMPT ; syntax message. MOV SYNTAX_FLAG,1 CALL CLS XOR DX,DX CALL SET_CURSOR MOV DX,OFFSET SIGNATURE CALL PRINT_STRING PROMPT: MOV DX,OFFSET SOURCE_PROMPT ;Point to appropriate prompt OR DI,DI JZ DISP_PROMPT MOV DX,OFFSET TARGET_PROMPT DISP_PROMPT: CALL PRINT_STRING ; and display it. MOV DX,OFFSET NOT_FOUND CALL PRINT_STRING MOV SI,OFFSET USER_INPUT ;User input storage. MOV BYTE PTR [SI],65 ;Maximum of 65 characters. MOV DX,SI MOV AH,0AH INT 21H ;Buffered Keyboard Input. INC SI MOV BYTE PTR [SI],SPACE ;Emulate command line entry. INC SI ;SI -> string. RET ;-------------------------------------------------------------------------; ; INPUT: BP -> filespec start; SI -> filespec end; BX -> filename start. ; ; DI -> filespec storage; ; ; OUTPUT: SI -> path end; CY = 0 if filespec exist; CY = 1 if not exist. ; ;-------------------------------------------------------------------------; FIND_PATH: MOV BYTE PTR [SI],0 ;ASCIIZ the string. CMP BYTE PTR [SI - 1],":" ;Drive-only? JZ DO_GLOBAL ;If yes, use global. CK_ROOT: MOV CX,1 ;CX=1:"\"not=root ;CX=0:"\"=root. CMP BYTE PTR [BX - 1],"\" ;Filespec start path delimiter? JNZ CK_PATH ;If no, not root. CMP BYTE PTR [BX - 2],":" ;Else, prefaced with colon JZ ROOT ;If yes, then root. CMP BYTE PTR [BX - 2],SPACE ;Prefaced with white space? JA CK_TRAILING ;If no, then trailing slash? ROOT: DEC CX ;Else, root; CX=0 for root ; flag. JMP SHORT CK_PATH ;Change default path. CK_TRAILING: CMP BX,SI ;Filename start = filespec end? JNZ CK_PATH ;If no, not trailing slash. MOV BYTE PTR [BX - 1],0 ;Else, zero out trailing slash MOV BX,OFFSET STAR_DOT_STAR ; and use global filespec. CK_PATH: MOV DX,BP ;See if filespec is a path CALL CHANGE_DIR ; by changing directory. JC CK_FILESPEC ;If failed, remove filename. DO_GLOBAL: MOV BX,OFFSET STAR_DOT_STAR ;Else, use global for filename. JMP SHORT GOT_FILESPEC ;Done here. CK_FILESPEC: JCXZ SAVE_DELIMIT ;Is path root? ; If yes leave "\". DEC BX ;Else, point to slash. SAVE_DELIMIT: PUSH [BX] ;Preserve filename start. MOV BYTE PTR [BX],0 ;Temp ASCIIZ twixt path and ; name. CALL CHANGE_DIR ;Change directory. POP [BX] ;Restore first byte of ; filename. PUSHF ;Save CHDIR status. JCXZ CK_FILENAME ;If root, done here. INC BX ;Else, re-adjust filename ; pointer. CK_FILENAME: POPF ;Retrieve CHDIR status. JNC GOT_FILESPEC ;If successful, got filespec. CALL FIND_FIRST ;Else, check if filename. JC RESTORE_DRIVE ;If not, invalid filespec. GOT_FILESPEC: MOV AH,19H ;Get current drive. INT 21H ADD AL,"A" ;Convert to ASCII. MOV [DI + SPEC_LENGTH],AL ;Make a copy. STOSB ;Store it. MOV AL,":" ;Add colon delimiter. MOV [DI + SPEC_LENGTH],AL ;Make a copy. STOSB MOV SI,DI ADD DI,SPEC_LENGTH CALL GET_DIR ;Add complete path via DOS. DEC SI ;Point to "\". PATH_END: LODSB ;Make a copy and at the same STOSB ; time find end of path. OR AL,AL JNZ PATH_END DEC DI ;Point to end of path. PUSH DI ;Add save it. DEC SI ;Adjust spec path pointer also. MOV DI,SI MOV SI,BX CALL ADD_NAME ;Add spec to end of path. MOV DX,OFFSET CURRENT_DIR ;Restore default directory. CALL CHANGE_DIR POP SI ;Return path end pointer. CLC ;Successful. RESTORE_DRIVE: PUSHF MOV DL,DEFAULT_DRIVE ;Restore default drive. MOV AH,0EH INT 21H POPF RET ;-----------------------------------------------------------------------------; ; INPUT: DX -> Complete filespec; BP -> Seg name storage. ; ; OUTPUT: BP:DI -> Storage end; CY = 0 if successful ; ; CY = 1 if segment full or ran out of memory and DX -> Error message. ; ;-----------------------------------------------------------------------------; FIND_FILES: PUSH ES ;Preserve extra segment. MOV ES,BP ;ES:DI -> filename storage. XOR DI,DI MOV WORD PTR ES:[DI],-1 ;Assume empty directory. CALL FIND_FIRST ;Any files? JC FILES_DONE ;If no, assumed right. FIND_NEXT: CALL STORE_NAME ;Store a filename. CALL CK_AVAIL ;Make sure we not out of ; memory. JC FILES_END ;If not enough, exit. MOV AH,4FH ;Find Next Matching. INT 21H JNC FIND_NEXT ;If successful store filename. MOV AX,-1 ;Else, mark the end with -1. STOSW CALL SORT ;Sort 'em. FILES_DONE: CLC ;No error so CY = 0. FILES_END: POP ES ;Restore extra segment. RET ;---------------------------------------------------------------------; ; INPUT: ES segment of filenames to sort; Selection sort algorithm. ; ;---------------------------------------------------------------------; SORT: PUSH DS ;Preserve couple registers. PUSH DI PUSH ES POP DS ;DS = ES. XOR SI,SI ;SI = first record. NEXT_SORT: MOV AX,SI ;Carry source pointer in AX. MOV BX,SI ;Carry destination pointer in DX. ADD BX,SIZE FILE_RECORD CMP WORD PTR [BX],-1 ;Sort is done when last record. JZ SORT_END PUSH SI ;Save record pointer. NEXT_RECORD: MOV SI,AX ;Restore inside loop pointers. MOV DI,BX MOV CX,SIZE LIST_NAME ;Filename length. REPZ CMPSB ;Compare the name fields. JB NO_SWITCH ;If below, no switch. SWAP: MOV AX,BX ;Else, AX = selected record. NO_SWITCH: ADD BX,SIZE FILE_RECORD ;Move to next record in list. CMP WORD PTR [BX],-1 ;End of list? JNZ NEXT_RECORD ;If no, continue. POP SI ;Else, restore outside loop ; ptr. CMP SI,BX ;Did we make a selection? JZ SELECT_LOOP ;If no, go to next list. PUSH SI ;Else, save pointer. MOV CX,(SIZE FILE_RECORD - 2) / 2 MOV DI,AX NEXT_SWAP: MOV AX,[DI] ;Swap the selection into place. MOVSW MOV [SI - 2],AX LOOP NEXT_SWAP POP SI SELECT_LOOP: ADD SI,SIZE FILE_RECORD ;Next record. JMP NEXT_SORT SORT_END: POP DI ;Restore registers. POP DS RET ;----------------------------------------------------------------------------; ; INPUT: ES:DI pointer; OUTPUT: CY = 1 if segment full or ran out of memory ; ;----------------------------------------------------------------------------; CK_AVAIL: CMP DI,65535 - (2 * SIZE FILE_RECORD) ;End of segment? MOV DX,OFFSET TOO_MANY JA AVAIL_END ;If yes, too many files. MOV AX,DI ;Else, calculate the pointer ADD AX,16 + 15 ; in paragraphs. MOV CL,4 SHR AX,CL MOV BX,ES ADD AX,BX CMP AX,TOP_MEMORY ;Top of memory? MOV DX,OFFSET OUT_OF_MEMORY ;If yes, not enough memory. JA AVAIL_END STC AVAIL_END: CMC ;Complement the carry status. RET ;----------------------------------------------------------------------; ; INPUT: BP:DI = current seg:off; OUTPUT: BP = start of new segment. ; ;----------------------------------------------------------------------; CALC_SEG: ADD DI,SIZE FILE_RECORD + 15 MOV CL,4 SHR DI,CL ADD BP,DI RET ;--------------------------------------------------------------------------; ; Keyboard subroutines. ; ; INPUT: BP = BAR_LINE; BX = LISTING_LINE; CX = LAST_BAR; DX = PAGE_LENGTH ; ;--------------------------------------------------------------------------; PLUS: MOV AL,LITTLE_ARROW ;Use little right arrow for ; mark. JMP SHORT PLUSMINUS MINUS: MOV AL,SPACE ;Remove mark with space char. PLUSMINUS: PUSH DS ;Preserve some registers. PUSH BX CALL FIND_BAR ;Find bar record. JC PLUSMINUS_END ;If on blank line, skip. MOV MARK[SI],AL ;Else, store the mark. PLUSMINUS_END: POP BX ;Restore registers. POP DS MOV AH,2 INT 16H ;Shift key pressed? TEST AL,SHIFT_KEYS ;If no, move down line. JZ DOWN ;Else, move up a line. UP: DEC BP ;Move bar up a line. JL PAGEKEY_END ;If < 0, ignore. CMP BP,BX ;If bar below top, OK. JAE PAGE_UPDATE DEC BX ;Else, move listing up a line. JMP SHORT PAGE_UPDATE DOWN: INC BP ;Move bar down a line. CMP BP,CX ;If > last line, then ignore. JA PAGEKEY_END ADD DX,BX ;Listing top + page length = CMP BP,DX ; listing bottom; If bar below JB PAGE_UPDATE ; listing bottom, OK. INC BX ;Else move listing down a line. JMP SHORT PAGE_UPDATE PGUP: SUB BP,DX ;Move bar up a page. SUB BX,DX ;Move listing up a page. JC HOME ;If listing < top, then home. JMP SHORT PAGE_UPDATE ;Else, OK. PGDN: ADD BX,DX ;Move listing down a page. CMP BX,CX ;If <= last line, do bar. JBE DO_BAR SUB BX,DX ;Else, back to where we were MOV BP,CX ; and move bar to last line JMP SHORT PAGE_UPDATE ; and update. DO_BAR: ADD BP,DX ;Move bar down a page. CMP BP,CX ;If bar <= last line, OK. JBE PAGE_UPDATE MOV BP,CX ;Else, move bar to last line. JMP SHORT PAGE_UPDATE HOME: XOR BP,BP ;Move bar to top. XOR BX,BX ;Move listing to top. JMP SHORT PAGE_UPDATE END_KEY: MOV BP,CX ;Move bar to last line. INC CX ;Last line + 1 - page length = SUB CX,DX ; top of last page. CMP BX,CX ;If less than a full page, JG PAGE_UPDATE ; then already at last page. MOV BX,CX ;Else, move listing to last ; page. JMP SHORT PAGE_UPDATE PAGE_UPDATE: MOV BAR_LINE,BP ;Store the new bar MOV LISTING_LINE,BX ; and listing line start. PAGEKEY_END: RET ;----------------------------------------------; F1: MOV AH,FILES_MODE ;Retrieve current file mode. INC AH ;Go to next mode. INC AH CMP AH,ALIKE ;Is it above last mode, Alike? JBE F1_STORE ;If no, OK. XOR AH,AH ;Else, wrap to All file mode. JMP SHORT F1_STORE ;Store and update. S_F1: MOV AH,FILES_MODE ;Retrieve current file mode. DEC AH ;Reverse direction. DEC AH CMP AH,ALL ;Is it below All file mode? JGE F1_STORE ;If no, OK. MOV AH,ALIKE ;Else, wrap to last mode, ; Alike? F1_STORE: MOV FILES_MODE,AH ;Store new mode. CALL DISPLAY_MENU ;Update the menu. CALL MATCH ;Update the matches. RET ;----------------------------------------------; F2: MOV AL,LITTLE_ARROW ;Mark all records with little JMP SHORT DO_MARKS ; right arrow. ;----------------------------------------------; F3: MOV AL,SPACE ;Mark all records with space ; char DO_MARKS: PUSH DS MOV DS,SOURCE_SEG XOR SI,SI ;DS:SI -> source records. JMP SHORT DO_MARK NEXT_ALL: ADD SI,SIZE FILE_RECORD ;Next record. DO_MARK: CMP LIST_NAME[SI],-1 ;Is this last record? JZ MARKS_END ;If yes, done. MOV MARK[SI],AL ;Else, store mark. JMP SHORT NEXT_ALL MARKS_END: POP DS RET ;----------------------------------------------; F4: MOV RESPONSE,OFFSET COPY_MSG JMP SHORT CK_COPY F5: MOV RESPONSE,OFFSET MOVE_MSG CMP FILES_MODE,ALIKE ;Can't move files in alike ; mode. JNZ CK_COPY CALL BEEP RET CK_COPY: PUSH DS ;Preserve data segment. MOV DS,SOURCE_SEG ;DS:SI -> source records. XOR SI,SI XOR CX,CX ;Initialize counter to zero. JMP SHORT COUNT_MARKS ;Count the marks. FOUND_MARK: INC CX ;Increment count. NEXT_COUNT: ADD SI,SIZE FILE_RECORD ;Next record. COUNT_MARKS: CMP LIST_NAME[SI],-1 ;Last record? JZ GOT_COUNT ;If yes, got count of marks. CMP DISP_ORDER[SI],-1 ;Else, is record displayed? JZ NEXT_COUNT ;If no, skip. CMP MARK[SI],LITTLE_ARROW ;Else, is it marked? JNZ NEXT_COUNT ;If no, skip. JMP FOUND_MARK ;Else, count it. GOT_COUNT: POP DS ;Restore data segment. MOV MARKED_COUNT,CX ;Save count of marks. JCXZ COPY_BAR ;If none marked, copy bar. CALL GET_COUNT ;Else, convert count to ASCII. MOV BX,OFFSET MARKED_MSG ;Will display marked message. CALL GET_RESPONSE ;Ask user if should continue. JNZ COPY_MARKED ;If confirmed, continue. JMP F4_END ;Else, exit. COPY_MARKED: PUSH LISTING_LINE ;Preserve current page PUSH BAR_LINE ; and bar line. CALL HOME ;Start searching for marked XOR SI,SI ; files from home position. JMP SHORT CK_ABORT ;Go check keypress for abort. NEXT_REC3: ADD SI,SIZE FILE_RECORD ;Next record. NEXT_MARKED: MOV BP,BAR_LINE ;Paging commands need line MOV BX,LISTING_LINE ; page data. MOV CX,LAST_BAR MOV DX,PAGE_LENGTH CALL DOWN ;Move bar down a line. CK_ABORT: CALL CK_KEY ;Any keypress? JNZ MARKED_END ;If yes, quite copying. CALL DISP_LISTINGS ;Else, display current bar. PUSH DS MOV DS,SOURCE_SEG MOV AX,DISP_ORDER[SI] ;Retrieve display order and MOV BL,MARK[SI] ; mark of current record. POP DS CMP AX,-1 ;Is it displayed? JNZ CK_BAR ;If yes, see if bar record. ADD SI,SIZE FILE_RECORD ;Else, next record. JMP CK_ABORT CK_BAR: AND AX,NOT 8000H ;Else, strip highlight bit. CMP AX,BAR_LINE ;Is it current line? JA NEXT_MARKED ;If above, skip for now. CMP BL,LITTLE_ARROW ;Is it marked? JNZ NEXT_REC3 ;If no, next record. MOV BP,SI ;Else, copy; First convert name CALL GET_SOURCE ; back to dot delimited ASCIIZ. CALL COPY ;Copy the file. JC MARKED_END ;If failed, exit. MOV SI,BP ;Else, retrieve record pointer. DEC MARKED_COUNT ;Decrement marked count. JNZ NEXT_REC3 ;Continue until zero. CALL DISP_LISTINGS ;Display last asterisk. MARKED_END: POP BAR_LINE ;Restore bar and page. POP LISTING_LINE JMP SHORT F4_REREAD ;Done. ;----------------------------------------------; COPY_BAR: PUSH DS CALL FIND_BAR ;Find bar record. POP DS JNC VALID_BAR ;Is bar on blank line? CALL BEEP ;If yes, beep and exit. JMP SHORT F4_END VALID_BAR: MOV BP,SI ;Else, convert name to dot CALL GET_SOURCE ; delimited ASCIIZ. XOR BX,BX ;No "marked files" message. CALL GET_RESPONSE ;Ask user for confirmation. JZ F4_END ;If aborted, exit. CALL COPY ;Else, copy the highlighted ; file. F4_REREAD: CMP RESPONSE,OFFSET MOVE_MSG ;Did we move files? JNZ READ_TARGET ;If no, just read target. CALL SOURCE_DIR ;Else, get new source dir also. READ_TARGET: CALL TARGET_DIR JNC F4_UPDATE CALL MENU_OFFSET ;Calculate menu offset. ADD DI,80 * 2 ;Place error message on second MOV BH,MENU_ATTR ; menu line with menu ; attribute. MOV SI,DX ;Error message. CALL WRITE_STRING ;Write the message. MOV SI,OFFSET PRESS_MSG CALL WRITE_STRING CALL HIDE_CURSOR ;Rehide the cursor. CALL BEEP ;Draw attention with beep. CALL GET_KEY ;Pause for keystroke. CALL CLS XOR DX,DX CALL SET_CURSOR JMP ERROR ;Abort to DOS. F4_UPDATE: CMP RESPONSE,OFFSET MOVE_MSG ;Did we do a move? JZ KEEP_BAR ;If yes, preserve bar/page. CMP FILES_MODE,UNIQUE ;Are different files ; displayed? JNZ KEEP_BAR ;If no, then preserve ; bar/page. CALL MATCH ;Else, home bar and page. JMP SHORT F4_END KEEP_BAR: CALL DO_MATCH F4_END: CALL HIDE_CURSOR ;Rehide the cursor. CALL DISPLAY_MENU ;Redisplay the menu. CALL CLEAR_KEY ;Clear the keyboard. RET ;Done. ;--------------------------------------------------; ; OUTPUT: CY = 1 if failed; CY = 0 if successful. ; ;--------------------------------------------------; COPY: MOV SI,OFFSET SOURCE_NAME ;Add filename to both source MOV DI,SOURCE_END ; and target path spec. CALL ADD_NAME MOV SI,OFFSET SOURCE_NAME MOV DI,TARGET_END CALL ADD_NAME MOV DX,OFFSET SOURCE_FILE ;Get attribute, size and date CALL FIND_FIRST ; of source file via ; Find First. MOV SI,OFFSET DTA MOV DI,OFFSET SOURCE_STATS ;Store the info. MOV CX,SIZE MATCHING REP MOVSB MOV AX,3D00H ;Open source file for reading. INT 21H JNC SAVE_HANDLE JMP COPY_END ;If failed, exit. SAVE_HANDLE: MOV DI,AX ;Else, save source handle. MOV DX,OFFSET TARGET_FILE ;Point to target name. CALL FIND_FIRST ;Does it exist? JNC CK_IF_MOVE ;If yes, see if move request. CALL DISK_FREE ;Else, get disk free space. JMP SHORT CK_FREE ;Go see if enough room. CK_IF_MOVE: CMP RESPONSE,OFFSET MOVE_MSG ;Is it a move request? JNZ CK_IF_SAME ;If no, see if same as source. STC JMP CLOSE_READ ;Else, exit with error flag. CK_IF_SAME: MOV CL,DTA.ATTRIBUTE ;Get attribute of target XOR CH,CH MOV SI,CX ; and save. XOR CX,1 ;Flip read-only attribute. MOV AX,4301H ;Change file mode. INT 21H MOV DX,OFFSET SOURCE_FILE ;Now get source attribute. MOV AX,4300H INT 21H JNC CK_CHANGED JMP COPY_END ;Exit if error. CK_CHANGED: CMP CL,SOURCE_STATS.ATTRIBUTE ;Else, see if it has ; changed. PUSHF ;Save compare results. MOV DX,OFFSET TARGET_FILE ;Restore target attribute. MOV CX,SI MOV AX,4301H ;Change file mode. INT 21H POPF ;Retrieve compare results. STC ;Assume files are the same. JNZ CLOSE_READ ;If attr changed, they are ; so exit CALL DISK_FREE ;Else, get disk free space. ADD AX,DTA.SIZE_LOW ADC DX,DTA.SIZE_HIGH ;Target size + disk free. CK_FREE: SUB AX,SOURCE_STATS.SIZE_LOW ;Total - source size. SBB DX,SOURCE_STATS.SIZE_HIGH JB CLOSE_READ ;If negative, not enough ; room. CREATE: MOV DX,OFFSET TARGET_FILE ;Create and truncate target XOR CX,CX ; file to zero MOV AH,3CH INT 21H JC CLOSE_READ MOV SI,AX ;Save handle. MOV DS,BUFFER_SEG ;Read/write buffer. XOR DX,DX ;Offset zero. COPY_READ: MOV BX,DI ;Retrieve read handle. MOV CX,CS:BUFFER_SIZE ;Buffer size. MOV AH,3FH INT 21H ;Read source file. JC COPY_DONE ;If carry, failed; exit. OR AX,AX ;If zero bytes read, done. JZ CHANGE_DATE ;Change target date to source. MOV CX,AX ;Else, bytes read into counter. MOV BX,SI ;Retrieve write handle. MOV AH,40H INT 21H ;Write the buffer to disk. JC COPY_DONE ;If failed, exit. CMP CX,AX ;Write same number as read? STC ;Assume no. JNZ COPY_DONE ;If no, failed; exit. CMP CX,CS:BUFFER_SIZE ;Was it a full read? JZ COPY_READ ;If yes, there must be more. CHANGE_DATE: MOV BX,SI ;Write handle. MOV CX,CS:SOURCE_STATS.FILE_TIME ;Else, make time/date MOV DX,CS:SOURCE_STATS.FILE_DATE ; same as source. MOV AX,5701H INT 21H MOV DS,CS:SOURCE_SEG ;Mark success with asterisk. MOV DS:MARK[BP],"*" COPY_DONE: PUSH CS ;Restore data segment. POP DS CLOSE_WRITE: PUSHF ;Save error if any. MOV BX,SI ;Close write file. MOV AH,3EH INT 21H POP AX ;Retrieve flags. JC CLOSE_READ ;Close successful? XCHG AH,AL ;If no, exit with error, else SAHF ; retrieve write state. CLOSE_READ: PUSHF ;Save flags. MOV BX,DI ;Close read file. MOV AH,3EH INT 21H POPF ;Write file status. COPY_END: PUSHF ;Save status. JNC CK_DELETE ;If no carry, successful. CALL HIDE_CURSOR CALL MENU_OFFSET ;Else, calculate menu offset. ADD DI,80 * 2 ;Place error message on second MOV BH,MENU_ATTR ; menu line with menu MOV SI,RESPONSE ; attribute. CALL WRITE_STRING ;Write the message. MOV SI,OFFSET PRESS_MSG CALL WRITE_STRING CALL BEEP ;Draw attention with beep. CALL GET_KEY ;Pause for keystroke. JMP SHORT COPY_RETURN CK_DELETE: CMP RESPONSE,OFFSET MOVE_MSG ;Move request? JNZ COPY_RETURN ;If no, done here. POPF MOV DX,OFFSET SOURCE_FILE ;Else, delete the source MOV AH,41H ; file. INT 21H PUSHF COPY_RETURN: POPF ;Retrieve status. RET ;----------------------------------------------; ; INPUT: SI -> Filename; DI -> End of path. ; ;----------------------------------------------; ADD_NAME: MOV AL,"\" ;Backslash delimiter. CMP [DI - 1],AL ;Is there a delimiter? JZ ADD_IT ;If yes, continue. STOSB ;Else, add delimiter. ADD_IT: LODSB ;Add the filename. CMP AL,"a" JB GOT_NAME CMP AL,"z" JA GOT_NAME AND AL,5FH ;Capitalize. GOT_NAME: STOSB OR AL,AL ;ASCIIZ. JNZ ADD_IT RET ;----------------------------------------------; F6: PUSH DS ;Preserve segment registers. PUSH ES ;Place cursor back on screen at MOV DX,300H ; third row in case there is CALL SET_CURSOR ; a DOS print error message. MOV BX,SOURCE_SEG ;BX -> source segment. XOR SI,SI ;Start of source. XOR DI,DI ;Start of target. XOR BP,BP ;Start of order. JMP SHORT PRINT_HEADER ;Print directory header on ; page. NEXT_PRINT: MOV DS,BX ;Source on left side of page. CMP LIST_NAME[SI],-1 ;End of listing? JNZ PRINT1 ;If no, continue. MOV DS,CS:TARGET_SEG ;Target listing segment CMP LIST_NAME[DI],-1 ;End of Target listing also? JZ F6_END ;If yes, done. PRINT1: MOV DS,BX ;Source segment. MOV CX,40 ;40 characters per half line. CALL DO_LINE ;Print a spec. XCHG SI,DI ;Target pointer. MOV DS,CS:TARGET_SEG ;Target segment. MOV CX,40 CALL DO_LINE ;Print left half of line. XCHG SI,DI ;Restore pointers. CALL NEW_LINE ;CR LF to new line. INC BP ;Increment order counter. MOV AX,BP XOR DX,DX MOV CX,54 DIV CX OR DX,DX ;If MOD 54 = 0 then formfeed. JNZ NEXT_PRINT CALL FORMFEED PRINT_HEADER: PUSH CS ;Back to code segment. POP DS PUSH SI ;Save some pointers. PUSH BP MOV BP,OFFSET PRINT_CHAR ;Print directory heading at CALL WRITE_PATH ; top of each page. POP BP ;Restore the pointers. POP SI CALL NEW_LINE ;Double space before filenames. CALL NEW_LINE JMP NEXT_PRINT ;Next line. F6_END: CALL FORMFEED ;Spit out last printed page. CALL HIDE_CURSOR POP ES ;Restore segments. POP DS RET ;----------------------------------------------------; ; INPUT: DS:SI -> filename. Entry point at DO_LINE ; ;----------------------------------------------------; NEXT_REC2: ADD SI,SIZE FILE_RECORD ;Next filename. DO_LINE: CMP LIST_NAME[SI],-1 ;Last record? JZ BLANK_LINE ;If yes, blank line. MOV DX,DISP_ORDER[SI] ;Retrieve display order. CMP DX,-1 ;Is it displayed? JZ NEXT_REC2 ;If no, next record. MOV AX,OFFSET NOT_RECENT ;Assume not a recent file. TEST DX,8000H ;Is it highlighted? JZ COMPARE_PRINT ;If no, see if current order. MOV AX,OFFSET RECENT ;Else, use recent codes. AND DX,NOT 8000H ;Strip highlight bit. COMPARE_PRINT: CMP DX,BP ;Entry less than order? JB NEXT_REC2 ;If yes, next record. JA BLANK_LINE ;If above, blank line. PUSH BX PUSH CX MOV BX,AX ;Get offset. MOV AL,CS:[BX] ;Get char or code count. CMP AL,6 ;Is it above 6? JA PRINT_MARK ;If yes, assumed right. MOV CL,AL ;Else, it's a printer code ; count. XOR CH,CH ;Zero in high half. NEXT_CODE: INC BX ;Point to a code. MOV AL,CS:[BX] ;Retrieve it. CALL PRINT_CHAR ;Print it. LOOP NEXT_CODE MOV AL,SPACE ;Indent with a space. PRINT_MARK: CALL PRINT_CHAR POP CX POP BX DEC CX PRINT_LINE: LODSB ;Else, print the line. CALL PRINT_CHAR LOOP PRINT_LINE ADD SI,7 ;Pointer date/time/order JMP SHORT DO_LINE_END ; fields. BLANK_LINE: MOV AL,SPACE ;Blank line with spaces. CALL PRINT_CHAR LOOP BLANK_LINE DO_LINE_END: RET ;----------------------------------------------; NEW_LINE: MOV AL,CR ;Carriage return linefeed. CALL PRINT_CHAR MOV AL,LF CALL PRINT_CHAR RET FORMFEED: MOV AL,FF ;Formfeed. PRINT_CHAR: MOV DL,AL ;Print via DOS. MOV AH,5 INT 21H RET ;-----------------------------------------------------------------------; ; OUTPUT: DS:SI -> Highlighted bar record; CY = 1 if bar on blank line. ; ;-----------------------------------------------------------------------; FIND_BAR: MOV DI,BAR_LINE ;Retrieve bar line. XOR SI,SI ;DS:SI -> source records. MOV DS,SOURCE_SEG JMP SHORT GET_BAR NEXT_BAR: ADD SI,SIZE FILE_RECORD ;Next record. GET_BAR: CMP LIST_NAME[SI],-1 ;End of listing? JZ NO_NAME ;If yes, no name. MOV BX,DISP_ORDER[SI] ;Retrieve display order. CMP BX,-1 ;Is it displayed? JZ NEXT_BAR ;If no, next record. AND BX,NOT 8000H ;Else, strip highlight bit. CMP BX,DI ;Is display order same as bar? JB NEXT_BAR ;If > then next record. JA NO_NAME ;If above, then no name. CLC ;If same, then valid name. RET NO_NAME: STC RET ;-----------------------------------------------------------------; ; INPUT: CX = binary count; OUTPUT: SOURCE_NAME = ASCII of count. ; ;-----------------------------------------------------------------; GET_COUNT: PUSH BX PUSH DI MOV AX,CX ;Retrieve number. MOV BX,10 ;Divisor of ten. XOR CX,CX ;Zero in counter. NEXT_DIV: XOR DX,DX ;Zero in high half. DIV BX ;Divide by ten. ADD DL,"0" ;Convert to ASCII. PUSH DX ;Save results. INC CX ;Also increment count. OR AX,AX ;Are we done? JNZ NEXT_DIV ;Continue until zero. MOV DI,OFFSET SOURCE_NAME NEXT_NUMBER: POP AX ;Retrieve numbers. STOSB ;And store. LOOP NEXT_NUMBER XOR AL,AL ;ASCIIZ string. STOSB POP DI POP BX RET ;--------------------------------------------------------------; ; INPUT: BP -> Source filename; OUTPUT: SOURCE_NAME = filename ; ;--------------------------------------------------------------; GET_SOURCE: PUSH DS MOV DS,SOURCE_SEG ;DS:SI -> Source name. MOV SI,BP MOV DI,OFFSET SOURCE_NAME ;Name storage. MOV CX,8 ;8 characters of name. NEXT_NAME: LODSB CMP AL,SPACE ;End of name? JZ EXTENSION ;If yes, do extension. STOSB LOOP NEXT_NAME EXTENSION: MOV SI,BP ;Retrieve name start. ADD SI,9 ;Move to extension field. CMP BYTE PTR [SI],SPACE ;Is there any extension? JZ NAME_DONE ;If no, done. MOV AL,"." ;Else, add delimiting dot. STOSB MOV CX,3 ;3 characters for extension. NEXT_EXT: LODSB CMP AL,SPACE JZ NAME_DONE STOSB LOOP NEXT_EXT NAME_DONE: XOR AL,AL ;ASCIIZ. STOSB POP DS RET ;-----------------------------------------------------------------------------; ; INPUT: BX -> MARKED_MSG if marked; OUTPUT: ZF=1 if cancel; ZF=0 if confirm. ; ;-----------------------------------------------------------------------------; GET_RESPONSE: PUSH BX ;Save message pointer. CALL MENU_OFFSET ;Calculate menu screen offset. MOV BH,MENU_ATTR ;Menu attribute. MOV CX,80 * 2 ;Blank out the two lines of ; menu. NEXT_MENU: MOV AL,SPACE CALL WRITE_SCREEN LOOP NEXT_MENU MOV DH,ROWS ;Retrieve the rows. DEC DH ;Next to last line. XOR DL,DL CALL SET_CURSOR ;Set the cursor. MOV SI,RESPONSE ;Write TTY, copy or move CALL TTY_STRING ; message. MOV SI,OFFSET SOURCE_NAME ;Write filename or mark count. CALL TTY_STRING POP BX ;Retrieve message pointer. CMP BX,OFFSET MARKED_MSG ;Is it "marked files" message? JNZ DO_TO ;If no, skip. MOV SI,BX ;Else, display it. CALL TTY_STRING DO_TO: MOV SI,OFFSET TO_MSG ;Display rest of CALL TTY_STRING ; "to Target Directory? Y/N" MOV SI,OFFSET DIRECTORY_MSG ; message. CALL TTY_STRING MOV SI,OFFSET QUERY_MSG CALL TTY_STRING NEXT_RESPONSE: CALL GET_KEY ;Get a key. CMP AL,ESC_SCAN ;If ESC, abort. JZ RESPONSE_END CMP AL,N_SCAN ;If "N", abort. JZ RESPONSE_END CMP AL,Y_SCAN ;If not "Y", ignore. JNZ NEXT_RESPONSE ;Else, cursor to MOV DX,300H ; third row in case there is CALL SET_CURSOR ; a DOS critical error message. OR AL,1 ;Return ZF = 0 to confirm. RESPONSE_END: RET ;----------------------------------------------; VIDEO_SETUP: MOV AX,500H ;Make sure active page is zero. INT 10H MOV AX,40H ;Point to the ROM BIOS data MOV ES,AX ; area MOV AL,ES:CRT_MODE ;Retrieve current video mode. CMP AL,7 ;Is it mono mode? JZ GET_ROWS ;If yes, continue. ADD STATUS_REG,20H ;Else, adjust status register ADD VIDEO_SEG,800H ; and video segment. CMP AL,2 ;Is it BW80? JZ GET_ROWS ;If yes, continue. MOV HEADING_ATTR,INVERSE_BLUE MOV ACTIVE_ATTR,INTENSE MOV BODY_ATTR,BLUE ;Else, use color attributes. MOV HIGHLIGHT_ATTR,INTENSE_BLUE MOV MENU_ATTR,INVERSE_BLUE MOV BAR_ATTR,CYAN CMP AL,3 ;Is it mode CO80? JZ GET_ROWS ;If yes, continue. MOV AX,300H ;Else, change video mode to CO80. INT 10H GET_ROWS: MOV AL,ES:CRT_ROWS ;Retrieve rows - 1. OR AL,AL ;BIOS supported? JNZ STORE_ROWS ;If yes, store MOV AL,24 ;Else, use 25 lines. STORE_ROWS: MOV ROWS,AL ;Store rows. XOR AH,AH SUB AX,4 MOV PAGE_LENGTH,AX ;Page length = display rows-4. ;----------------------------------------------; DISPLAY_SETUP: PUSH CS POP ES CALL CLS ;Clear screen. CALL HIDE_CURSOR ;Hide the cursor off screen. MOV BL,MENU_ATTR ;Turn on border. MOV CL,4 SHR BL,CL MOV AH,0BH INT 10H MOV SI,OFFSET COPYRIGHT ;Point to copyright message. XOR DI,DI ;Point to top left of display. MOV BH,HEADING_ATTR ;Use header attribute. CALL WRITE_STRING ;And display it. MOV AL,BOX CALL WRITE_SCREEN MOV AL,SPACE CALL WRITE_SCREEN INC SI ;Bump pointer past LF CALL WRITE_STRING ; and display rest of header. CALL DISPLAY_DIRS ;Display directory heading. MOV BP,OFFSET WRITE_SCREEN ;Display directories. CALL WRITE_PATH MOV BH,BODY_ATTR ;Body attribute. MOV CX,PAGE_LENGTH ;Page length. MOV DI,(3 * 160) + (2 * 40) ;Middle of third row. NEXT_LINE: MOV AL,VERT_LINE ;Display delimiting CALL WRITE_SCREEN ; vertical lines. ADD DI,(2 * 79) LOOP NEXT_LINE ;----------------------------------------------; DISPLAY_MENU: MOV SI,OFFSET MENU ;Display menu on bottom two CALL MENU_OFFSET ; lines. MOV CL,MENU_ATTR ;Menu attribute. MOV CH,ACTIVE_ATTR ;Active mode attribute. MOV BH,CL CALL WRITE_STRING ;"F1" CMP FILES_MODE,ALL JNZ DISPLAY3 MOV BH,CH DISPLAY3: CALL WRITE_STRING ;"All files" MOV BH,CL CMP FILES_MODE,UNIQUE JNZ DISPLAY4 MOV BH,CH DISPLAY4: CALL WRITE_STRING ;"Different files" MOV BH,CL CMP FILES_MODE,ALIKE JNZ DISPLAY5 MOV BH,CH DISPLAY5: CALL WRITE_STRING ;"Alike files" MOV BH,CL CALL WRITE_STRING ;Print rest of menu RET ;----------------------------------------------; DISPLAY_DIRS: MOV BH,ACTIVE_ATTR ;Directory attribute. MOV DI,80 * 2 MOV SI,OFFSET SOURCE_MSG ;Display "Source Directory" CALL WRITE_STRING CALL WRITE_STRING MOV CX,SOURCE_COUNT CALL WRITE_COUNT ;Write the source file count. MOV SI,OFFSET TARGET_MSG ;Display "Target Directory". CALL WRITE_STRING MOV SI,OFFSET DIRECTORY_MSG CALL WRITE_STRING MOV CX,TARGET_COUNT ;And finally target files ; count. WRITE_COUNT: CALL GET_COUNT MOV CX,GAP NEXT_GAP: MOV AL,SPACE ;Space over some. CALL WRITE_SCREEN LOOP NEXT_GAP MOV SI,OFFSET SOURCE_NAME ;Storage for count in ASCIIZ. MOV CX,40 - DIRECTORY_LEN NEXT_NUM: LODSB ;Get a number. OR AL,AL ;End of string? JZ WRITE_FILES ;If yes, add "files" message. CALL WRITE_SCREEN LOOP NEXT_NUM WRITE_FILES: MOV SI,OFFSET FILES_MSG CALL WRITE_STRING NEXT_SPACE: MOV AL,SPACE ;Pad balance with spaces. CALL WRITE_SCREEN LOOP NEXT_SPACE RET ;----------------------------------------; ; OUTPUT: DI -> Screen offset for menu. ; ;----------------------------------------; MENU_OFFSET: MOV AL,2 * 80 ;(Rows * chars) - chars MUL ROWS ; = menu offset. SUB AX,2 * 80 MOV DI,AX RET ;-----------------------------------------------------------------------------; ; INPUT: SI->Filespec; DI->Video buffer; BP=OFFSET WRITE_SCREEN OR PRINT_CHAR; ;-----------------------------------------------------------------------------; WRITE_PATH: MOV SI,OFFSET SOURCE_SPEC ;Write first string. CALL DISP_FILESPEC MOV SI,OFFSET TARGET_SPEC ;Write second string. DISP_FILESPEC: MOV AL,SPACE ;Indent one space. CALL BP MOV CX,39 NEXT_FILESPEC: LODSB OR AL,AL ;Null terminates string. JZ PAD_SPACES ;Pad balance with spaces. CALL BP LOOP NEXT_FILESPEC JMP SHORT FILESPEC_END PAD_SPACES: MOV AL,SPACE CALL BP LOOP PAD_SPACES FILESPEC_END: RET ;----------------------------------------------------; ; INPUT: AL = character to write; BH = attribute. ; ;----------------------------------------------------; WRITE_SCREEN: PUSH ES MOV ES,CS:VIDEO_SEG ;Point to screen segment. MOV DX,CS:STATUS_REG ;Retrieve status register. MOV BL,AL ;Store character in BL. HORZ_RET: IN AL,DX ;Get status. RCR AL,1 ;Is it low? JC HORZ_RET ;If not, wait until it is. CLI ;No more interrupts. HWAIT: IN AL,DX ;Get status. RCR AL,1 ;Is it high? JNC HWAIT ;If no, wait until it is. MOV AX,BX ;Retrieve character; now it's STOSW ; OK to write to screen buffer. STI ;Interrupts back on. POP ES RET ;Return ;------------------------------------------------------------------; ; INPUT: SI -> to string to display; DI -> where to display it. ; ; Entry point is WRITE_STRING. ; ;------------------------------------------------------------------; WRITE_IT: CALL WRITE_SCREEN ;Write a character. WRITE_STRING: LODSB ;Retrieve a character. CMP AL,CR ;Keep writing until a carriage JA WRITE_IT ; return or zero encountered. RET ;----------------------------------------------; STORE_NAME: MOV SI,OFFSET DTA.FILE_NAME ;Point to filename. PUSH DI MOV AX,SPACE SHL 8 + SPACE ;Initiate storage with spaces. MOV CX,(SIZE FILE_RECORD - 6) / 2 ;Fill out with spaces. REP STOSW POP DI ;Point to start of storage ; again. MOV CX,SIZE LIST_NAME ;Store 12 bytes of filename. NEXT_STORE: LODSB ;Get a byte. OR AL,AL ;End of filename? JZ END_STORE ;If yes, finish with blanks. CMP AL,"." ;Is it the period? JNZ STORE_BYTE ;If no, store. SUB CX,3 ;Else, store 3 spaces. MOV AL,SPACE REP STOSB ADD CX,3 JMP SHORT NEXT_STORE ;Get next byte. STORE_BYTE: STOSB ;Store byte. LOOP NEXT_STORE ;Get next byte. END_STORE: MOV AL,SPACE ;Pad balance with spaces. REP STOSB PUSH DI ;Save pointer. ADD DI,8 ;Move to end of bytes field. MOV DX,DTA.SIZE_LOW ;Retrieve high and low words MOV AX,DTA.SIZE_HIGH ; of size in bytes. MOV BX,10 ;Convert to decimal. STD ;Reverse direction. NEXT_SIZE: MOV CX,DX ;Low word in CX. XOR DX,DX ;Zero in high half. DIV BX ;Convert to decimal. XCHG AX,CX ;Retrieve low word. DIV BX XCHG AX,DX ;Retrieve remainder. ADD AL,"0" ;Convert to ASCII. STOSB ;Store it. MOV AX,CX ;Are we done? OR CX,DX JNZ NEXT_SIZE ;If no, divide again. CLD ;Back to forward direction. POP DI ;Retrieve pointer. ADD DI,11 ;Move to date field. DATE: MOV DX,DTA.FILE_DATE ;Retrieve date. MOV AX,DX MOV CL,5 ;Shift to lowest bits. SHR AX,CL AND AX,1111B ;Mask off all but month. MOV CL,0FFH ;Flag as no leading zeros. MOV CH,"-" ;Delimiting character. CALL STORE_WORD ;Store it. MOV AX,DX ;Retrieve date. AND AX,11111B ;Mask off all but day. XOR CL,CL ;Flag include leading zeros. MOV CH,"-" CALL STORE_WORD ;Store it. MOV AX,DX ;Retrieve date for last time. MOV CL,9 SHR AX,CL ;Mask off all but year. ADD AX,80 ;Adjust to ASCII. CMP AX,100 ;Past year 2000? JB DISPLAY_DATE ;If no, display. Else, adjust SUB AX,100 ; for next century. (Planning ; ahead!) DISPLAY_DATE: XOR CL,CL ;Display leading zeros. MOV CH,SPACE CALL STORE_WORD ;Store it. TIME: INC DI ;Move to time field. MOV DX,DTA.FILE_TIME ;Retrieve time. MOV AX,DX MOV CL,11 ;Shift to hours bits. SHR AX,CL PUSH AX CMP AX,12 ;Past noon? JBE MERIDIAN SUB AX,12 ;If yes, adjust. MERIDIAN: CMP AX,0 ;Midnight? JNZ NOT_MIDNIGHT MOV AX,12 ;If yes, adjust. NOT_MIDNIGHT: MOV CL,0FFH ;Suppress leading zeros. MOV CH,":" CALL STORE_WORD ;Store it. MOV AX,DX ;Retrieve time. MOV CL,5 ;Shift to minutes bits. SHR AX,CL AND AX,111111B ;Mask off all but minutes. XOR CL,CL POP DX ;Retrieve hours. MOV CH,"p" ;Assume PM. CMP DX,12 ;Is it PM? JAE PM MOV CH,"a" ;If no, AM. PM: CALL STORE_WORD ;Store it. INC DI ;Pointer past mark. MOV AX,DTA.FILE_DATE STOSW ;Store date in DOS format. MOV AX,DTA.FILE_TIME STOSW ;Store time in DOS format. INC DI ;Bump pointer past DISP_ORDER. INC DI RET ;Done here. ;-----------------------------------------------------------------------; ; Converts a two byte hex number to decimal followed by delimiter. ; ; INPUT: AX = hex number; BL = 10; CH = delimiter character to store. ; ; CL = 0 if zeros are to be stored; CL = -1 if leading zeros ignored. ; ; ES:DI points to storage. ; ;-----------------------------------------------------------------------; STORE_WORD: DIV BL ;Divide by ten. ADD AX,"00" ;Convert to ASCII. CMP CL,0 ;Display leading zero? JZ STORE_IT ;If yes, store as is. CMP AL,"0" ;Is it a leading zero? JNZ STORE_IT ;If no, store it. MOV AL,SPACE ;Else, store a space. STORE_IT: STOSW MOV AL,CH ;Also store delimiter character STOSB RET ;----------------------------------------------; CLS: XOR CX,CX ;Top left corner. MOV DH,ROWS MOV DL,80 - 1 MOV BH,BODY_ATTR ;Normal attribute. MOV AX,600H ;Scroll active page. INT 10H RET ;----------------------------------------------; GET_DIR: MOV BYTE PTR [SI],"\" ;DOS doesn't preface directory INC SI ; with slash so we must. XOR DL,DL MOV AH,47H ;Get current directory. INT 21H RET CHANGE_DIR: MOV AH,3BH ;Change current directory. INT 21H RET ;----------------------------------------------; FIND_FIRST: XOR CX,CX ;Normal files. MOV AH,4EH ;Find first. INT 21H RET ;----------------------------------------------; PRINT_STRING: MOV AH,9 ;Print string via DOS. INT 21H RET ;----------------------------------------------; DISK_FREE: MOV DL,BYTE PTR TARGET_SPEC ;Target drive. SUB DL,"A" - 1 MOV AH,36H ;Disk free space. INT 21H XOR DX,DX MUL BX ;Sectors per cluster * clusters MUL CX ;Result times bytes per cluster RET ; = available bytes. ;----------------------------------------------; BEEP: MOV BX,NOTE ;Tone frequency divisor. MOV DX,12H XOR AX,AX DIV BX MOV BX,AX ;8253 countdown. CALL DELAY ;Wait till clock rolls over. MOV AL,0B6H ;Channel 2 speaker functions. OUT 43H,AL ;8253 Mode Control. JMP $+2 ;IO delay. MOV AX,BX ;Retrieve countdown. OUT 42H,AL ;Channel 2 LSB. JMP $+2 MOV AL,AH ;Channel 2 MSB. OUT 42H,AL IN AL,61H ;Port B. OR AL,3 ;Turn on speaker. JMP $+2 OUT 61H,AL CALL DELAY ;Delay one second. IN AL,61H ;Get Port B again. AND AL,NOT 3 ;Turn speaker off. JMP $+2 OUT 61H,AL RET ;Done. ;-----------------------------; DELAY: PUSH DS ;Preserve data segment. MOV AX,40H ;Point to BIOS data segment. MOV DS,AX MOV AX,DS:[6CH] ;Retrieve timer low. NEXT_BEEP: MOV DX,DS:[6CH] ;Retrieve timer low. CMP DX,AX ;Have we timed out? JZ NEXT_BEEP ;If not, wait until second up. POP DS ;Restore data segment. RET ;----------------------------------------------; HIDE_CURSOR: MOV DH,ROWS ;Retrieve CRT rows. INC DH ;Move one line below off ; screen. XOR DL,DL ;Column zero. SET_CURSOR: XOR BH,BH ;Page zero. MOV AH,2 ;Set cursor position. INT 10H RET ;----------------------------------------------; GET_KEY: MOV AH,0 ;Wait for next keyboard input. INT 16H XCHG AH,AL RET CK_KEY: MOV AH,1 ;Is a keystroke available. INT 16H RET CLEAR_IT: CALL GET_KEY ;Read keystrokes until buffer CLEAR_KEY: CALL CK_KEY ; empty. JNZ CLEAR_IT RET ;----------------------------------------------; WRITE_TTY: MOV AH,0EH INT 10H RET TTY: CALL WRITE_TTY TTY_STRING: LODSB ;ASCIIZ marks end of string. OR AL,AL JNZ TTY RET ;----------------------------------------------; EVEN DTA = $ SOURCE_STATS = DTA + SIZE MATCHING CURRENT_DIR = SOURCE_STATS + SIZE MATCHING SOURCE_SPEC = CURRENT_DIR + SPEC_LENGTH SOURCE_FILE = SOURCE_SPEC + SPEC_LENGTH TARGET_SPEC = SOURCE_FILE + SPEC_LENGTH TARGET_FILE = TARGET_SPEC + SPEC_LENGTH USER_INPUT = TARGET_FILE + SPEC_LENGTH SOURCE_NAME = USER_INPUT + 14 STACK_POINTER = SOURCE_NAME + 68 + 256 SOURCE_OFFSET = STACK_POINTER _TEXT ENDS END START