Procedure

     LXDFID ( Lex, default identifier characters )

     ENTRY LXDFID ( IDSPEC )

Abstract

     Return the default specification for the characters that may
     appear in an identifier.

Required_Reading

     None.

Keywords

     CHARACTER
     PARSING
     SCANNING
     STRING
     UTILITY

Declarations

    IMPLICIT NONE

    INTEGER               MXSPEC
    PARAMETER           ( MXSPEC = 512 )

    INTEGER               LBCELL
    PARAMETER           ( LBCELL = -5 )

    INTEGER               IDSPEC ( LBCELL : * )

Brief_I/O

     VARIABLE  I/O  DESCRIPTION
     --------  ---  --------------------------------------------------
     IDSPEC    I-O  Identifier character specification.
     MXSPEC     P   Recommended size for declaration of IDSPEC.
     LBCELL     P   The SPICE cell lower bound.

Detailed_Input

     IDSPEC   is an integer cell. The caller must initialize
              IDSPEC as a cell, and should use MXSPEC as the size
              of IDSPEC.

Detailed_Output

     IDSPEC   is an integer cell containing a specification of
              the head and tail identifier character sets to be
              used the entry point LXIDNT in scanning strings.

Parameters

     MXSPEC   is the recommended size for the declaration of
              IDSPEC; the caller should declare IDSPEC as shown:

                 INTEGER       IDSPEC ( LBCELL : MXSPEC )

              The caller should also initialize IDSPEC as shown:

                 CALL SSIZEI ( MXSPEC, IDSPEC )

     LBCELL   is the SPICE cell lower bound.

Exceptions

     1)  If IDSPEC is not properly initialized on input, or if its size
         is too small, an error is signaled by a routine in the call
         tree of this routine. IDSPEC is undefined on output in this
         case.

Files

     None.

Particulars

     This routine allows a calling program to obtain the default set of
     allowed patterns for identifiers recognized by LXIDNT.

     Normally, this routine should be called once during the calling
     program's initialization.

Examples

     See the $Examples section of the umbrella routine LXNAME.

Restrictions

     None.

Literature_References

     None.

Author_and_Institution

     N.J. Bachman       (JPL)
     J. Diaz del Rio    (ODC Space)
     B.V. Semenov       (JPL)

Version

    SPICELIB Version 1.1.0, 27-AUG-2021 (JDR)

        Added IMPLICIT NONE statement.

        Edited the header to comply with NAIF standard.

    SPICELIB Version 1.0.1, 10-FEB-2014 (BVS)

        Added LBCELL to the $Declarations, $Brief_I/O, and $Parameters
        sections.

    SPICELIB Version 1.0.0, 25-OCT-1995 (NJB)