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CD ROM Paradise Collection 4 1995 Nov.iso
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0046_Pad STRING to the LEFT.pas
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Pascal/Delphi Source File
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1993-09-26
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1KB
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43 lines
{*****************************************************************************
* Function ...... PadL()
* Purpose ....... To pad the left side of a string with a character
* Parameters .... s String to pad
* c Character to pad with
* n New length for <s>
* Returns ....... <s> padded with character <c> with length <n>
* Notes ......... None
* Author ........ Martin Richardson
* Date .......... October 2, 1992
*****************************************************************************}
FUNCTION PADL( s: STRING; n: BYTE; c: CHAR ): STRING; ASSEMBLER;
ASM
PUSH DS
CLD
LES DI, @Result
INC DI
LDS SI, s
XOR AX, AX
LODSB
PUSH AX
XOR CX, CX
MOV CL, n
SUB CL, AL
CMP CX, 0
JNB @@1
XOR CX, CX
@@1: MOV AL, c
REP STOSB
POP CX
REP MOVSB
MOV DI, WORD PTR @Result
MOV AL, n
MOV BYTE PTR ES:[DI], AL
POP DS
END;