AsciiToDec(string [, order] [, signed])
Last updated January 2, 2003
Version: 2 | Requires: ColdFusion 5 | Library: StrLib
Description:
Convert ASCII characters (i.e. binary file) into a decimal number. You can specify either Intel or Motorola byte order, and process signed intergers normally or in two's complement notation.
Return Values:
Returns a string.
Example:
<cfoutput>
Unsigned Intel: #AsciiToDec(ascii)#<br>
Signed Intel: #AsciiToDec(ascii, "i", true)#<br>
TCN signed Intel: #AsciiToDec(ascii, "i", "tcn")#<br>
Unsigned Motorola: #AsciiToDec(ascii, "m")#
</cfoutput>
Parameters:
| Name | Description | Required |
|---|---|---|
| string | String to format. | Yes |
| order | Byte order (i for Intel or m for Motorola) | No |
| signed | Process signed integers normally or in two's complement notation. Values are false (process normally), true (signed), and tcn (2's complement notation) | No |
Full UDF Source:
<cfscript>
/**
* Convert ASCII characters into a decimal number.
* Removed evaluate
*
* @param string String to format. (Required)
* @param order Byte order (i for Intel or m for Motorola) (Optional)
* @param signed Process signed integers normally or in two's complement notation. Values are false (process normally), true (signed), and tcn (2's complement notation) (Optional)
* @return Returns a string.
* @author Evan Keller (coldfusion@evankeller.com)
* @version 2, January 2, 2003
*/
function AsciiToDec(string) {
var order="i"; //Optional arrtibute: Byte Order
//"i"= Intel (default)
//"m"= Motorola
var signed=false; //Optional attribute: Signed
//false= unsigned (default)
//true= signed
//"tcn"= 2's Complement Notation
var result=0;
var i=0;
if (ArrayLen(arguments) gt 1) {
order = arguments[2];
}
if (ArrayLen(arguments) gt 2) {
signed = arguments[3];
}
for (i=1; i LTE len(string)+1; i=i+1) {
if (order is "i") {
result = result + (asc(mid(string, i, 1)) * 256^(i-1));
}
if (order is "m") {
result = result + (asc(mid(string, i, 1)) * 256^(len(string)-i));
}
}
switch (signed) {
case true:
if (len(string) is 0) { //If the string is "0" the length is calculated as zero,
//which throws things off, we set the string to " " so
//it has a length of one.
string = " ";
}
result = result - 256^len(string)/2;
case "tcn":
if (result GTE 256^len(string)/2) {
result = result - 256^len(string);
}
default:
result = result;
}
return result;
}
</cfscript>
Search CFLib.org
Latest Additions
cfRssFeed
2 day(s) ago
structBlend
23 day(s) ago
IsZIPUK
23 day(s) ago
getTagContentAll
29 day(s) ago
ListReturnDuplicat...
1 month(s) ago