SetString Function

Action

Copies a string at a specified position into a string.

注: This function can be used to access pointers.

Include file

Kernel.bdh

Syntax

SetString( inout sDest     : string,
           in    nPosition : number,
           in    sSource   : string,
           in    nMaxLen   : number optional,
           in    sFillChar : string optional ):boolean;

Return value

true if successful
false if string to copy terminated or failure

Parameter	Description
sDest	Identifies the destination string
nPosition	Specifies the position to copy to in aSrcString, where the first position in a string is 1 (not 0)
sSource	Identifies the string to copy
nMaxLen	Maximum number of characters to copy (optional). If this parameter is omitted, the whole source string is copied to the destination string
sFillChar	Specifies a character sequence used to fill the remaining bytes if the copied string is shorter than nMaxLen (optional). If this parameter is passed to the function, no NULL termination is inserted into the destination string

注: If the length of sSource is larger than nMaxLen, only nMaxLen bytes are copied to sDest, including a NULL termination byte. If the optional parameter sFillChar is passed to the function, then no NULL termination is inserted into sDest.

Example

dcltrans
  transaction TSetString
  const
    SIZE_STRUCT := 32;
  var
    myBDLstring    : string(SIZE_STRUCT);
    sString, sDest : string;
  begin
    // Copy a string from sString into myBDLstring starting
    // at position 22 and thereby (through mapping)set
    // the element myString in Struct1
    sString := "Holidays";
    SetString(myBDLstring, 22, sString);
    SetString(sDest, 1, sString, 20, "_");
    write(sDest);
  end TSetString;

Output

Holidays____________