Chip 1997 April/Chip_1997-04_cd.bin/prezent/cb/data.z/WRITESTR.ASM

Assembly Source File | 1997-01-16 | 5KB | 351 lines

; *******************************************************
; *                            *
; *     Delphi Runtime Library                          *
; *                            *
; *    Copyright (c) 1996 Borland International    *
; *                            *
; *******************************************************

    INCLUDE    SE.ASM
    INCLUDE    FILEIO.ASM

    .386
    .MODEL    FLAT

    EXTRN    Output:DWORD, _RewritText:NEAR, _Flush:NEAR, SetInOutRes:NEAR
        EXTRN   _GetTLS:NEAR, InOutRes:DWORD
    PUBLIC    _WriteString, _Write0String, _WriteBytes, _WriteSpaces
    PUBLIC    _WriteCString, _Write0CString, _WriteChar, _Write0Char, _WriteLn

    .CODE

;    PROCEDURE _WriteBytes( VAR t: Text; VAR b; cnt : Longint );

_WriteBytes PROC

; ->    EAX    Pointer to file record
;    EDX    Pointer to buffer
;    ECX    Number of bytes to write
; <-    EAX    Pointer to file record

    PUSH    ESI
    PUSH    EDI

    MOV    ESI,EDX

    CMP    [EAX].Mode,fmOutput
    JNE    @@fileNotOutput

@@loop:
    MOV    EDI,[EAX].BufPtr
    ADD    EDI,[EAX].BufPos

;    remainingBytes = t.bufSize - t.bufPos

    MOV    EDX,[EAX].BufSize
    SUB    EDX,[EAX].BufPos

;    if (remainingBytes <= cnt)

    CMP    EDX,ECX
    JG    @@1

;    t.BufPos += remainingBytes, cnt -= remainingBytes

    ADD    [EAX].BufPos,EDX
    SUB    ECX,EDX

;    copy remainingBytes, advancing ESI

    PUSH    EAX
    PUSH    ECX
    MOV    ECX,EDX
    REP    MOVSB

    CALL    [EAX].InOutFunc
    TEST    EAX,EAX
    JNZ    @@error

    POP    ECX
    POP    EAX
    JMP    @@loop

@@1:
    ADD    [EAX].BufPos,ECX
    REP    MOVSB
@@exit:
    POP    EDI
    POP    ESI
    RET

@@fileNotOutput:
    CMP    EAX,offset Output
    JNE    @@fileNotOutputError
    PUSH    ECX
    PUSH    EDX
    PUSH    EAX
    CALL    _RewritText
    POP    EAX
    POP    EDX
    POP    ECX
    CMP    [EAX].Mode,fmOutput
    JE    @@loop

@@fileNotOutputError:
    MOV    EAX,105
        CALL    SetInOutRes
    JMP    @@exit

@@error:
        CALL    SetInOutRes
    POP    ECX
    POP    EAX
    JMP    @@exit

_WriteBytes ENDP


    .DATA
spCnt    EQU    64
spBuf    DB    spCnt DUP (' ')
    .CODE

;    PROCEDURE _WriteSpaces( VAR t: Text; cnt: Longint );

_WriteSpaces PROC

; ->    EAX    Pointer to text record
;    EDX    Number of spaces (<= 0: None)

    MOV    ECX,EDX
@loop:
    MOV    EDX,offset spBuf

    CMP    ECX,spCnt
    JLE    @@1

    SUB    ECX,spCnt
    PUSH    EAX
    PUSH    ECX
    MOV    ECX,spCnt
    CALL    _WriteBytes
        CALL    _GetTLS
    CMP    [EAX].InOutRes,0
    JNE    @@error
    POP    ECX
    POP    EAX
    JMP    @loop

@@1:
    TEST    ECX,ECX
    JG    _WriteBytes

    RET

@@error:
    POP    ECX
    POP    EAX
    RET

_WriteSpaces ENDP


;    PROCEDURE _Write0String( VAR t: Text; s: String );

_Write0String PROC

; ->    EAX    Pointer to text record
;    EDX    Pointer to string

    XOR    ECX,ECX
    MOV    CL,[EDX]
    INC    EDX
    JMP    _WriteBytes

_Write0String ENDP


;    PROCEDURE _WriteString( VAR t: Text; s: String; width: Longint );

_WriteString PROC

; ->    EAX    Pointer to text record
;    EDX    Pointer to string
;    ECX    Field width

    PUSH    EBX

    XOR    EBX,EBX
    MOV    BL,[EDX]
    SUB    ECX,EBX
    JLE    @@1

    PUSH    EAX
    PUSH    EDX

    MOV    EDX,ECX
    CALL    _WriteSpaces

    POP    EDX
    POP    EAX
@@1:
    MOV    ECX,EBX
    POP    EBX
    INC    EDX
    JMP    _WriteBytes

_WriteString ENDP

    .DATA
crlf    DB    0DH,0AH
    .CODE

;    PROCEDURE _WriteLn( VAR t: Text );

_WriteLn PROC

; ->    EAX    Pointer to text record

    MOV    EDX,offset crlf
    MOV    ECX,2
    CALL    _WriteBytes
    JMP    _Flush

_WriteLn ENDP

;    PROCEDURE _Write0Char( VAR t: Text; c: Char );

_Write0Char PROC

; ->    EAX    Pointer to text record
;    DL    Character

    CMP    [EAX].Mode,fmOutput
    JNE    @@fileNotOutput
@@loop:
    MOV    ECX,[EAX].BufPos
    CMP    ECX,[EAX].BufSize
    JGE    @@flush

    ADD    ECX,[EAX].BufPtr
    MOV    [ECX],DL

    INC    [EAX].BufPos

    RET

@@flush:
    PUSH    EAX
    PUSH    EDX
    CALL    [EAX].InOutFunc
    TEST    EAX,EAX
    JNZ    @@error
    POP    EDX
    POP    EAX
    JMP    @@loop

@@fileNotOutput:
    CMP    EAX,offset Output
    JNE    @@fileNotOutputError
    PUSH    EDX
    PUSH    EAX
    CALL    _RewritText
    POP    EAX
    POP    EDX
    CMP    [EAX].Mode,fmOutput
    JE    @@loop

@@fileNotOutputError:
    MOV    EAX,105
        JMP    SetInOutRes

@@error:
        CALL    SetInOutRes
    POP    EDX
    POP    EAX
    RET

_Write0Char ENDP


;    PROCEDURE _WriteChar( VAR t: Text; c: Char; width: Integer );

_WriteChar PROC

; ->    EAX    Pointer to text record
;    DL    Character
;    ECX    Field width

    PUSH    EDX

    LEA    EDX,[ECX-1]
    CALL    _WriteSpaces

    MOV    EDX,ESP
    MOV    ECX,1
    CALL    _WriteBytes

    POP    EDX

    RET

_WriteChar ENDP


;    PROCEDURE _Write0CString( VAR t: Text; s: PChar );

_Write0CString PROC

; ->    EAX    Pointer to text record
;    EDX    Pointer to string

    XOR    ECX,ECX
    JMP    _WriteCString

_Write0CString ENDP

;    PROCEDURE _WriteCString( VAR t: Text; s: PChar; width: Longint );

_WriteCString PROC

; ->    EAX    Pointer to text record
;    EDX    Pointer to string
;    ECX    Field width

    PUSH    ESI
    PUSH    EDI

    MOV    ESI,EAX
    PUSH    ECX

    MOV    EDI,EDX
    OR    ECX,-1
    MOV    AL,0
    REPNE    SCASB
    NOT    ECX
    DEC    ECX

    MOV    EDI,EDX

    POP    EDX


    SUB    EDX,ECX
    MOV    EAX,ESI
    PUSH    ECX
    CALL    _WriteSpaces
    POP    ECX

    MOV    EAX,ESI
    MOV    EDX,EDI

    POP    EDI
    POP    ESI
    JMP    _WriteBytes

_WriteCString ENDP

    END