Reverse Code Engineering RCE CD +sandman 2000/ReverseCodeEngineeringRceCdsandman2000.iso/RCE/Library/Manuels & Misc/Assembly/AOA.ZIP/CH15/TS.ASM

Assembly Source File | 1996-03-26 | 7.7 KB | 366 lines

;****************************************************************************
;
; TS:     A "Text Statistics" package which demonstrates the use of the UCR
;    Standard Library Package.
;
; Note:    The purpose of this program is not to demonstrate blazing fast
;    assembly code (it's not particularly fast) but rather to demonstrate
;    how easy it is to write assembly code using the standard library
;    and MASM 6.0.
;
; Randall Hyde
; 10/2/91
;
;***************************************************************************
;
;  The following include must be outside any segment and before the
;  ZZZZZZSEG segment.  It includes all the macro definitions for the
;  UCR Standard Library.
;
        include     stdlib.a    ;Links into the UCR Standard
        includelib    stdlib.lib    ; Library package.
;
;
dseg        segment    para public 'data'
;
WordCount    dw    0        ;Holds file word count value
LineCnt        dw    0        ;Holds # of lines in file
ControlCnt    dw    0        ;Counts # of control characters
Punct        dw      0        ;Counts # of punctuation characters
AlphaCnt    dw    0        ;Counts # of alphabetic characters
NumericCnt    dw    0        ;Counts numeric digits in file
Other        dw    0        ;Counts other chars in file
MemorySize    dw    0        ;# of paragraphs of free memory
Chars        dw    0        ;Total number of chars in file
TotalChars    dq    0.0        ;FP version of the above
FileHandle    dw    0        ;STDLIB file handle
Const100    dd    100.0
;
;
; Create some sets to use in this program:
;
        set    CharSet,Alphabetic,Punctuation,Control
;
;
; Character Counter array.  CharCnt [ch] contains the number of "ch"
; characters appearing in the file.
;
CharCnt        dw    256 dup (0)
;
; Boolean flag to denote in/not in a word:
;
InWord        db    0
;
dseg        ends
;
;
cseg        segment    para public 'code'
        assume    cs:cseg, ds:dseg

; Some useful constants-

EOFError    equ    8



; Okay, here's the main program which does the job:

TS        proc
        mov    ax, seg dseg        ;Set up the segment registers
        mov    ds, ax
        mov    es, ax
;
; Initialize the memory manager, giving all free memory to the heap.
;
        meminit
        mov    MemorySize, cx        ;Save # of available paragraphs.
;
; Set up the character sets:
;
;  First, build the Alphabetic set:
;
        mov    al, "A"
        mov    ah, "Z"
        lesi    Alphabetic
        RangeSet
        AddStrL
        db    "abcdefghijklmnopqrstuvwxyz",0
;
; Create the set with the punctuation characters:
;
        lesi    Punctuation
        AddStrL
        db    "!@#$%^&*()_-+={[}]|\':;<,>.?/~`", '"', 0
;
; Create the control character set:
;
        lesi    Control
        mov    al,0
        mov    ah, 1fh
        RangeSet
        mov    al, 7fh
        AddChar
;
;
; Print the amount of available memory.
;
        printf
        db    "Text Statistics Program",cr,lf
        db    "There are %d paragraphs of memory available",cr,lf,0
        dd    MemorySize
;
; Get the filename off the command line:
;
        argc
        cmp    cx, 1
        je    GoodCmdLine
        print
        db    cr,lf
        db    "Missing file name!",cr,lf
        db    "Usage: TS <filename>",cr,lf,0
        jmp    Return2DOS
;
GoodCmdLine:    mov    ax, 1
        argv                ;Get the filename.
;
; Open the file.
;
        mov    al, 0            ;Open for reading.
        fopen                ;Open the file.
        jnc    GoodOpen
;
; If the carry flag comes back set, we've got an error, print an appropriate
; message and quit:
;
        print
        db    "DOS error #",0
        puti                ;Error code is in AX.
        putcr
        jmp    Return2DOS
;
; If the carry flag comes back clear, we've successfully opened the file.
; AX contains the STDLIB filehandle, ES:DI still points at the filename
; allocated on the heap:
;
GoodOpen:    mov    FileHandle, AX        ;Save STDLIB file handle.
        print
        db    "Computing text statistics for ",0
        puts                ;Print filename
        free                ;Dispose of space on heap
        putcr
        putcr
;
; The following loops check for transitions between words and delimiters.
; Each time we go from "not a word" -> "word" this code bumps up the word
; count by one.
;
        mov    ax, FileHandle
        fReadOn
;
TSLoop:        getc
        jnc    NoError
        jmp    ReadError
;
; See if the character is alphabetic
;
NoError:    lesi    Alphabetic         ;Set contains A-Z, a-z
        Member
        jz    NotAlphabetic
        inc    AlphaCnt
        jmp    StatDone
;
; See if the character is a digit:
;
NotAlphabetic:    cmp    al, "0"
        jb    NotNumeric
        cmp    al, "9"
        ja    NotNumeric
        inc    NumericCnt
        jmp    StatDone
;
; See if the character is a punctuation character
;
NotNumeric:    lesi    Punctuation
        Member
        jz    NotPunctuation
        inc    Punct
        jmp    StatDone
;
; See if this is a control character:
;
NotPunctuation:    lesi    Control
        Member
        jz    NotControl
        inc    ControlCnt
        jmp    StatDone
;
NotControl:    inc    Other
StatDone:       mov    bl, al        ;Use char as index into CharCnt
        mov    bh, 0
        shl    bx, 1        ;Convert word index to byte index
        inc    CharCnt [bx]
;
; Count lines and characters here:
;
        cmp    al, lf
        jne    NotNewLine
        inc    LineCnt
;
NotNewLine:     inc    Chars
;
; Count words down here
;
        cmp    InWord, 0        ;See if we're in a word.
        je    NotInAWord
        cmp    al, " "
        ja    WCDone
        mov    InWord, 0        ;Just left a word
        jmp    WCDone
;
NotInAWord:    cmp    al, " "
        jbe    WCDone
        mov    InWord, 1        ;Just entered a word
        inc    WordCount
;
WCDone:
;
; Okay, or the current character into the character set so we can keep
; track of the characters which appear in this file.
;
        lesi    CharSet
        AddChar
        jmp    TSLoop
;
;
; Come down here on EOF or other read error.
;
ReadError:    cmp    ax, EOFError
        je    Quit
        print
        db    "DOS Error ",0
        puti
        putcr
        jmp    Return2DOS
;
; Return to DOS.
;
Quit:        freadoff
        mov    ax, FileHandle
        fclose
        printf
        db    cr,lf,lf
        db    "Number of words in this file is %d",cr,lf
        db    "Number of lines in this file is %d",cr,lf
        db    "Number of control characters is %d",cr,lf
        db    "Number of punctuation characters is %d",cr,lf
        db    "Number of alphabetic characters is %d",cr,lf
        db    "Number of numeric characters is %d",cr,lf
        db    "Number of other characters is %d",cr,lf
        db    "Total number of characters is %d",cr,lf
        db    lf, 0
        dd    WordCount,LineCnt,ControlCnt,Punct
        dd    AlphaCnt,NumericCnt,Other,Chars
;
; Print the characters that actually appeared in the file.
;
        lesi    CharSet
EC64:        mov    cx, 64            ;Chars/line on output.
EachChar:    RmvItem
        cmp    al, 0
        je    CSDone
        cmp    al, " "
        jbe    EachChar
        putc
        loop    EachChar
        putcr
        jmp    EC64
;
CSDone:        print
        db    cr,lf,lf
        db    "Press any key to continue:",0
        getc
        putcr
        putcr
;
; Now print the statistics for each character:
;
        mov    ax, Chars        ;Get character count,
        utof                ; convert it to a floating
        lesi    TotalChars        ; point value, and save this
        sdfpa                ; value in "TotalChars".
;
; Print out each character, the number of occurrences, and the ratio of
; this character's count to the total number of characters.
;
        mov    bx, " "*2        ;Start output with spaces.
ComputeRatios:    cmp    CharCnt[bx], 0
        je    SkipThisChar
        mov    ax, bx
        shr    ax, 1            ;Convert index to character
        putc                ; and print it.
        print
        db    " = ",0
        mov    ax, CharCnt [bx]
        mov    cx, 4
        putisize
        print
        db    "  Percentage of total is ",0
;
        utof
;
; Divide by the total number of characters in the file:
;
        lesi    TotalChars
        ldfpo
        fpdiv
;
; Multiply by 100 to get a percentage
;
        lesi    Const100
        lsfpo
        fpmul
;
; Print the ratio:
;
        mov    al, 7
        mov    ah, 3
        ftoam
        puts
        free
        print
        db    "%   ",cr,lf,0
;
SkipThisChar:    inc    bx
        inc    bx
        cmp    bx, 200h
        jb      ComputeRatios
        putcr
;
Return2DOS:    mov     ah, 4ch
        int     21h
;
;
TS        endp
;
;
;
cseg            ends
;
;
; Allocate a reasonable amount of space for the stack (2k).
;
sseg        segment    para stack 'stack'
stk        db    256 dup ("stack   ")
sseg        ends
;
;
;
; zzzzzzseg must be the last segment that gets loaded into memory!
; The UCR Standard Library package uses this segment to determine where
; the end of the program lies.
;
zzzzzzseg    segment    para public 'zzzzzz'
LastBytes    db    16 dup (?)
zzzzzzseg    ends
        end    TS