PC-SIG Library 8

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/ PC-SIG Library 8 / PC-SIG Library CD-ROM (8th Edition) (1990-04).iso / 201_300 / disk0223 / preview.asm < prev next >

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Assembly Source File | 1987-01-13 | 8.5 KB | 228 lines

TITLE PARSE.ASM - WORD COUNT PROCEDURE NAME PARSE PAGE 77,132 ; ; RETURNS CHAR COUNT, WORD AND SENTENCE COUNT ; COUNT OF ASCII FILES COMPILED INTO READING LEVEL INDEX ; CSECT SEGMENT PARA PUBLIC 'CODE' ASSUME CS:CSECT,DS:CSECT,SS:NOTHING,ES:NOTHING ORG 100H ENTRY: JMP START ; ; SKIP SMALL DATA SEGMENT] ; CHAR_COUNT DW 0 CHAR_CT_CARRY DW 0 LINE_COUNT DW 0 LINE_CT_CARRY DW 0 DISPLAY_FLAG DB 0 fsize dw 0 ;total bytes... fsize_cy dw 0 ;carry? started db 0 ;<> 0 when data read... ; maxpage equ 66 ;lines per page for defaults alpha_string db ' printable characters',13,10,'$' file_size db ' bytes in file',13,10,'$' word_string db ' words',13,10,'$' line_string db ' lines',13,10,'$' page_string db ' pages @ 66 Ln/Pg',13,10,'$' carry_64k db '65536+$' ; source db 13,10,'CP file unreachable,RC=255',13,10,'$' eofmsg db 'EOF reached.',13,10,'$' nodata db 'Warning: File is empty',13,10,'$' ENDMSG DB 13,10,'COMMAND COMPLETE',13,10,'$' errmsg db 13,10,'CP File read failure',13,10 DB 'COMMAND PROCESSING ABEND,RC=2',13,10,'$' begmsg db 'Execution begins ...',13,10,'$' ; ; ; BEFORE THE FILE CAN BE PARSED, THE COMMAND LINE HAS TO BE ; PARSED. THEN THE FILE WILL BE OPENED AND READ TO MAIN STORAGE ; START: MOV DI,80H ;POINT TO PARMS MOV BL,[DI] ;THE NUMBER OF CHARS XOR BH,BH ;ZERO TOP HALF MOV BYTE PTR DS:[BX+DI+1],0 NEXT_BYTE: INC DI ;POINT TO NEXT BYTE CMP BYTE PTR DS:[DI],32 ;A SPACE DELIMITER? JZ NEXT_BYTE ;YES - SKIP DELIMITERS MOV DX,DI MOV AX,3D00H ;OPEN THE FILE... INT 21H ;VIA CP JC EXIT ;ERRORS DURING OPEN PUSH AX ;SAVE FILE HANDLE MOV DX,OFFSET BEGMSG CALL DISPLAY_TEXT ;WRITE THE START MSG... POP AX ;RECOVER... PUSH AX ;IF OK, RECOVER THE FILEHANDLE READ: POP BX ;INTO THE RIGHT REGISTER PUSH BX MOV DX,OFFSET BUFFER ;POINT TO DTA MOV CX,64000 ;~64K BYTES IN BUFFER ZONE MOV AH,3FH ;READ FROM FILE INT 21H ;WITH CP JC CLOSE_FILE ;IF FAILURE, STOP WITH CP CMP AX,0 ;EOF REACHED? JNZ PARSE ;IF NOT, PARSE NEXT BATCH GO_DISPLAY: MOV DX,OFFSET EOFMSG ;END REACHED CALL DISPLAY_TEXT ;WRITE THE MESSAGE CMP FSIZE,1 ;ONLY THE EOF MARK? JA DATA ;NO - WRITE THE SUMMARY MOV DX,OFFSET NODATA CALL DISPLAY_TEXT JMP CLOSE_FILE DATA: CALL DISPLAY ;WRITE THE SUMMARY WITH CP CLOSE_FILE: JNC OK ;JUST CONTINUE MOV DX,OFFSET ERRMSG ;FILE READ ERROR CALL DISPLAY_TEXT ;WRITE AND STOP OK: POP BX ;FIXUP STACK MOV AH,3EH ;AND CLOSE FILE INT 21H ;CALL CP JC NOT_OK MOV DX,OFFSET ENDMSG CALL DISPLAY_TEXT ;END MESSAGE CLC ;CLEAR CARRY AFTER MESSAGE... NOT_OK: INT 20H ;CP KILLS PROCESS... EXIT: JNC OK2 ; MOV DX,OFFSET SOURCE CALL DISPLAY_TEXT OK2: ;MESSAGE IS WRITTEN... INT 20H ;CP TERMINATION ; ; EACH BYTE OF THE FILE WILL BE EXAMINED AND THE APPROPRIATE COUNTER ; WILL BE INCREMENTED (WORD, SENTENCE TOO) LONG WORDS WILL BE COUNTED ; WHEN 8 CHARS OR MORE ; PARSE: MOV CX,AX ;SET COUNTER TO BYTES READ MOV SI,OFFSET BUFFER CLD GET_CHAR: ADD FSIZE,1 ; ADC FSIZE_CY,0 LODSB AND AL,7FH ;STRIP WS HI - BIT IF THERE CMP AL,32 ;PRINTABLE? JB DELIMITER ;IF YES, NOT PRINTABLE... ADD CHAR_COUNT,1 ;ADD 1 TO CHAR COUNT ADC CHAR_CT_CARRY,0 ;AND ONE EXTRY IN CASE OVERFLOW JMP NOCR ;CAN'T BE... DELIMITER: CMP AL,0DH ;A CR ? JNE NOCR ADD LINE_COUNT,1 ADC LINE_CT_CARRY,0 NOCR: LOOP GET_CHAR ;AND CONTINUE... JMP READ ;NEXT BLOCK WHEN LOOP EXPIRED ; ; ; SUBROUTINE AREA BEGINS ; DISPLAY: MOV DL,10 ;LINEFEED FIRST MOV AH,02 ;JUST TO MAKE OUTPUT PRETTY INT 21H ;CP WRITES OUTPUT CMP CHAR_CT_CARRY,0 ;DID CHAR COUNT OVERFLOW? JZ NO_CARRY ;NO JUST CONTINUE MOV DX,OFFSET CARRY_64K MOV AH,9 ;AT LEAST THAT MANY + MORE... INT 21H ; NO_CARRY:MOV BX,CHAR_COUNT ;SAME WITH LOW HALF CALL NUMBERS MOV DX,OFFSET ALPHA_STRING CALL DISPLAY_TEXT CMP FSIZE_CY,0 JZ NOFCY ;NO FILE CARRY MOV DX,OFFSET CARRY_64K MOV AH,09H INT 21H ;WRITE THE MESSAGE NOFCY: MOV BX,FSIZE ;THE COMPLETE SIZE CALL NUMBERS ;WRITE THE TOTAL SIZE... MOV DX,OFFSET FILE_SIZE CALL DISPLAY_TEXT ;WRITE IT WITH CHARACTERS CMP LINE_CT_CARRY,0 JZ NOCRY ;NO CR CARRY VALUE USED MOV DX,OFFSET CARRY_64K MOV AH,09 INT 21H NOCRY: MOV BX,LINE_COUNT CALL NUMBERS MOV DX,OFFSET LINE_STRING CALL DISPLAY_TEXT CALL PGCALC CALL NUMBERS ;BX ALREADY SET MOV DX,OFFSET PAGE_STRING CALL DISPLAY_TEXT ;WRITE IT. RET ;FINSHED AT LAST... ; ; NUMBERS: MOV CX,10000 ;GET 10KS. CALL DIVIDE ; MOV CX,1000 ;1KS CALL DIVIDE TENTHS: MOV CX,100 ;100S CALL DIVIDE MOV CX,10 CALL DIVIDE MOV CX,1 CALL DIVIDE MOV DISPLAY_FLAG,0 RET ;BACK TO CALLER... ; ; DIVIDE: MOV AX,BX XOR DX,DX DIV CX MOV BX,DX MOV DL,AL CMP AL,0 JZ FLAG OR DISPLAY_FLAG,AL FLAG: CMP DISPLAY_FLAG,0 JNZ DISP_NUMBER MOV DL,-10H ;PAD WITH BLANKS. DISP_NUMBER: ADD DL,30H ;ASCII WEIGHT MOV AH,2H ;DISPLAY VIA CP INT 21H RET ;CP RETURNS ; ; DISPLAY_TEXT: MOV AH,09H ;WRITE A MSG WITH CP INT 21H RET ;BACK TO CALLER ; ; ; PGCALC: MOV AX,LINE_COUNT XOR DX,DX MOV BX,MAXPAGE DIV BX CMP AX,0 JNE NOINCR ;IF NEEDED INC AX NOINCR: MOV BX,AX ;BX IS SET CMP DX,0 ;WAS IT EVEN DIVISION? JE NOFIX ;YES - BLOW OUT INC BX ;OTHERWISE, HANDLE THE REMAINDER CMP AX,66 ;BUT NOT IF < 66 TO START ... JA NOFIX ;OK AS IS... DEC BX ;RESTORE TO 1 NOFIX: RET ;ALL SET... ; BUFFER: ;MARK BUFFER ZONE... CSECT ENDS END ENTRY ;COMPLETED.