CharRLL()

CHARRLL()

Process each character in a string with bitwise ROLL LEFT operation

Syntax

      CHARRLL( <[@]cString>, <nBitsToRLL> ) --> cRLLString

Arguments

<[@]cString> string to be processed

<nBitsToRLL> number of bit positions to be rolled to the left

Returns

<cRLLString> string with bitwise rolled left characters

Description

The CHARRLL() function constructs a new string from the string passed as parameter. To do this, it performs a bitwise ROLL LEFT (RLL) operation to the characters of the string and places a character in the resulting string whose ASCII value equals to the result of that operation. Be aware that, in contrast to CHARSHL(), bits rolled out on the left are put in again on the right. If the string is passed by reference, the resulting string is stored in <cString>, too. By setting the CSETREF()-switch to .T., the return value can be omitted.

Examples

      ? charrll( Chr(1)+Chr(2)+Chr(4)+Chr(8)+Chr(16)+Chr(32)+Chr(64)+Chr(128), 3 )
      // --> Chr(8)+Chr(16)+Chr(32)+Chr(64)+Chr(128)+Chr(1)+Chr(2)+Chr(4)

Tests

      charrll( Chr(1)+Chr(2)+Chr(4)+Chr(8)+Chr(16)+Chr(32)+Chr(64)+Chr(128), 3 ) 
        == Chr(8)+Chr(16)+Chr(32)+Chr(64)+Chr(128)+Chr(1)+Chr(2)+Chr(4)

Compliance

CHARRLL() is a new function that is only available in Harbour’s CT3 lib.

Platforms

All

Files

Source is charop.c, library is ct3.

Seealso

CHARADD(), CHARSUB(), CHARAND(), CHAROR(), CHARXOR(), CHARNOT(), CHARSHL(), CHARSHR(), CHARRLR(), CSETREF()

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2 responses to “CharRLL()

  1. Pingback: Harbour String Functions | Viva Clipper !

  2. Pingback: Harbour All Functions – C | Viva Clipper !

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