CHARSHL()

Process each character in a string with bitwise SHIFT LEFT operation

Syntax

      CHARSHL( <[@]cString>, <nBitsToSHL> ) --> cSHLString

Arguments

<[@]cString> string to be processed

<nBitsToSHL> number of bit positions to be shifted to the left

Returns

<cSHLString> string with bitwise shifted left characters

Description

The CHARSHL() function constructs a new string from the string passed as parameter. To do this, it performs a bitwise SHIFT LEFT (SHL) 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 bits shifted out of the byte are lost. If you need a bit rotation, use the CHARRLL() function instead. 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

      ? charshl( 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(0)+Chr(0)+Chr(0)

Tests

      charshl( 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(0)+Chr(0)+Chr(0)

Compliance

CHARSHL() 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(), CHARSHR(), CHARRLL(), CHARRLR(), CSETREF()