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IsASCIILDH Function

Determines if a byte value is a Letter, Digit, or Hyphen in the US-ASCII character set.

File
function IsASCIILDH(
    const AByte: Byte
): Boolean; overload;
Parameters 
Description 
AByte 
Value to check for Letter, Digit, or Hyphen compliance. 

Boolean - True when the byte is a Letter, Digit, or Hyphen.

IsASCIILDH is an overloaded Boolean function used to determine if the value in AByte represents a Letter, Digit, or Hyphen in the US-ASCII character set. 

IsASCIILDH returns True when Abyte contains a byte value in the following ranges: 

 

Hex 
Decimal 
Characters 
$2D 
45 
'-' 
$30 .. $39 
48 .. 57 
'0' .. '9' 
$41 .. $5A 
59 .. 90 
'A' .. 'Z' 
$61 .. $7A 
97 .. 122 
'a' .. 'z' 

 

Use the overloaded IsASCIILDH function to examine bytes values in TIdBytes for Letter, Digit, and Hyphen compliance.

IsASCIILDH

Copyright 1993-2006, Chad Z. Hower (aka Kudzu) and the Indy Pit Crew. All rights reserved.
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