Examples

The following examples demonstrate the principles underlying SDF function calls in the programming languages COBOL and FORTRAN.

Use of the COBOL interface (program excerpt)

.
 .
 DATA DIVISION.
 WORKING-STORAGE SECTION.
*work variable
 01 SDF-DATA
     02 SDF-INIT PIC X(4) VALUE "INIT".
     02 SDF-READ PIC X(4) VALUE "READ".
     02 SDF-STMT PIC X(4) VALUE "STMT".
     02 SDF-TYPE PIC X(4) VALUE "TYPE".
     02 SDF-VAL  PIC X(4) VALUE "OPER".
     02 SDF-TYP  PIC 9(6) COMP.
     02 SDF-LNG  PIC 9(6) COMP.
     02 SDF-POS  PIC 9(6) COMP.
     02 SDF-LST  PIC 9(6) COMP.
     02 SDF-ERR  PIC S9(6) COMP.
     02 SDF-STMT PIC X(8).
     02 SDF-PROG PIC X(8).
 77 BUF PIC X(500).
 77 MAX PIC 9(6) COMP VALUE 500.
 01 VAL.
     02 FILLER PIC X OCCURS 1 TO 50 DEPENDING ON SDF-LNG.
 .
 .
*
 PROCEDURE DIVISION.
*
*INIT
*
    MOVE "TEST" TO SDF-PROG.
    CALL "SDF" USING SDF-INIT, BUF, SDF-ERR, MAX, SDF-PROG.
*
*READ
*
    CALL "SDF" USING SDF-READ, BUF, SDF-ERR.
*
*STMT
*
    CALL "SDF" USING SDF-STMT, BUF, SDF-ERR, SDF-STMT.
*
*TYPE
*
    CALL "SDF" USING SDF-TYPE, BUF, SDF-ERR, SDF-POS,
                     SDF-TYP, SDF-LNG.
*
*VAL
*
    CALL "SDF" USING SDF-VAL, BUF, SDF-ERR, SDF-POS, VAL,
                     SDF-LNG.
.
.

The program must be linked with the library SYSLIB.SDF.<version> (e.g. SYSLIB.SDF.210 for SDF V21.0). This library includes, among other things, a COBOL copy element containing the description of the SDF declarations (type S member SDFCOPY).

Use of the FORTRAN interface (program excerpt)

.
.
C*****Work variable
      CHARACTER*4 SDF$INIT/'INIT'/
      CHARACTER*4 SDF$READ/'READ'/
      CHARACTER*4 SDF$STMT/'STMT'/
      CHARACTER*4 SDF$VAL/'OPER'/
      CHARACTER*4 SDF$TYPE/'TYPE'/
      INTEGER SDF$LNG,SDF$POS,SDF$LST,SDF$TYP,SDF$ERR
      CHARACTER*8 SDF$STMT,SDF$PROG
      CHARACTER*500 AREA,VAL*50
      INTEGER MTYP(2),MLNG(2)
      *
      *INIT
      *
          CALL SDF(SDF$INIT,AREA,SDF$ERR,500,'TEST'BLANK''BLANK''BLANK''BLANK'')
      *
      *READ
      *
          CALL SDF(SDF$READ,AREA,SDF$ERR)
      *
      *STMT
      *
          CALL SDF(SDF$STMT,AREA,SDF$ERR,SDF$STMT)
      *
      *TYPE
      *
          CALL SDF(SDF$TYPE,AREA,SDF$ERR,SDF$POS,SDF$TYP,SDF$LNG)
      *
      *VAL
      *
          CALL SDF(SDF$VAL,AREA,SDF$ERR,SDF$POS,VAL,SDF$LNG)
      .
      .

The program must be linked with the library SYSLIB.SDF.<version> (e.g. SYSLIB.SDF.210 for SDF V21.0). This library includes, among other things, a FORTRAN include element containing the description of the SDF declarations (type S member SDFINCL).