Parse Decimal

Summary

The following are the RPG/LE fully free-form definitions and instructions needed for using the Parse Decimal service procedure. This service procedure simply allows the caller to extract a decimal value that is embedded in a character string with other (alpha) data.

By Dave Clark

Service Prototype

Place the following in a separate copybook for inclusion in both the caller and the service program source members.

**free

//******************************************************************************
// This procedure parses the first blank-delimited "word" of a character string
// into a decimal format as a return result.  If the first "word" cannot be
// parsed into a decimal format then the caller must monitor for the exception
// which will occur as a result.
//******************************************************************************
dcl-pr GenUtl_parseDecimal   packed(31:9);
  pString                    varchar(40) value;
end-pr;

Service Procedure

Place the following in a service program source member.

**free
ctl-opt NoMain AlwNull(*UsrCtl) Debug Option(*SrcStmt:*NoDebugIo)
        DatFmt(*ISO) TimFmt(*ISO);

//******************************************************************************
// This procedure parses the first blank-delimited "word" of a character string
// into a decimal format as a return result.  If the first "word" cannot be
// parsed into a decimal format then the caller must monitor for the exception
// which will occur as a result.
//******************************************************************************
dcl-proc GenUtl_parseDecimal export;
  dcl-pi *n                  packed(31:9);
    pString                  varchar(40) value;
  end-pi;

  dcl-s pos                  packed(3:0);

  pString = %trim(pString) + ' ';      // trim off all but one blank
  pos = %scan(' ': pString);           // find first blank in string

  return %dec(GenUtl_LeftString(pString:pos):31:9); // return parsed value
end-proc;

References

• GenUtl_LeftString service procedure