text: /*
  
  -Procedure lastnb_c ( Last non-blank character )
  
  -Abstract
  
     Return the zero based index of the last non-blank character in
     a character string.
  
  -Disclaimer
  
     THIS SOFTWARE AND ANY RELATED MATERIALS WERE CREATED BY THE
     CALIFORNIA INSTITUTE OF TECHNOLOGY (CALTECH) UNDER A U.S.
     GOVERNMENT CONTRACT WITH THE NATIONAL AERONAUTICS AND SPACE
     ADMINISTRATION (NASA). THE SOFTWARE IS TECHNOLOGY AND SOFTWARE
     PUBLICLY AVAILABLE UNDER U.S. EXPORT LAWS AND IS PROVIDED "AS-IS"
     TO THE RECIPIENT WITHOUT WARRANTY OF ANY KIND, INCLUDING ANY
     WARRANTIES OF PERFORMANCE OR MERCHANTABILITY OR FITNESS FOR A
     PARTICULAR USE OR PURPOSE (AS SET FORTH IN UNITED STATES UCC
     SECTIONS 2312-2313) OR FOR ANY PURPOSE WHATSOEVER, FOR THE
     SOFTWARE AND RELATED MATERIALS, HOWEVER USED.
  
     IN NO EVENT SHALL CALTECH, ITS JET PROPULSION LABORATORY, OR NASA
     BE LIABLE FOR ANY DAMAGES AND/OR COSTS, INCLUDING, BUT NOT
     LIMITED TO, INCIDENTAL OR CONSEQUENTIAL DAMAGES OF ANY KIND,
     INCLUDING ECONOMIC DAMAGE OR INJURY TO PROPERTY AND LOST PROFITS,
     REGARDLESS OF WHETHER CALTECH, JPL, OR NASA BE ADVISED, HAVE
     REASON TO KNOW, OR, IN FACT, SHALL KNOW OF THE POSSIBILITY.
  
     RECIPIENT BEARS ALL RISK RELATING TO QUALITY AND PERFORMANCE OF
     THE SOFTWARE AND ANY RELATED MATERIALS, AND AGREES TO INDEMNIFY
     CALTECH AND NASA FOR ALL THIRD-PARTY CLAIMS RESULTING FROM THE
     ACTIONS OF RECIPIENT IN THE USE OF THE SOFTWARE.
  
  -Required_Reading
  
     None.
  
  -Keywords
  
     ASCII
     CHARACTER
     SEARCH
  
  */
  
     #include "SpiceUsr.h"
     #include "SpiceZmc.h"
  
     SpiceInt lastnb_c ( ConstSpiceChar * string )
  
  /*
  
  -Brief_I/O
  
     VARIABLE  I/O  DESCRIPTION
     --------  ---  --------------------------------------------------
     string     I   Input character string.
  
     The function returns the zero-based index of the last non-blank
     character in a character string.
  
  -Detailed_Input
  
     string      is the input character string.
  
  -Detailed_Output
  
     The function returns the zero-based index of the last non-blank
     character in a character string. If the string is entirely blank
     or is empty, the value -1 is returned.
  
  -Parameters
  
     None.
  
  -Exceptions
  
     1)  If the `string' input string pointer is null, the error
         SPICE(NULLPOINTER) is signaled. The function returns the value
         -1.
  
  -Files
  
     None.
  
  -Particulars
  
     If the string is blank or null, return -1. Otherwise, step through
     the string one character at a time until something other than
     a blank is found. Return the zero based index of that something
     within the string.
  
     Note that if the length of the string to the last non-blank
     character is of interest, that value is the returned value plus one.
  
  -Examples
  
     The following examples illustrate the use of lastnb_c.
  
           last = lastnb_c ( "ABCDE"              );
           last is 4
  
           last = lastnb_c ( "AN EXAMPLE"         );
           last is 9
  
           last = lastnb_c ( "AN EXAMPLE        " );
           last is 9
  
           last = lastnb_c ( "                  " )
           last is -1
  
  -Restrictions
  
     None.
  
  -Literature_References
  
     None.
  
  -Author_and_Institution
  
     N.J. Bachman        (JPL)
     J. Diaz del Rio     (ODC Space)
     K.R. Gehringer      (JPL)
     I.M. Underwood      (JPL)
     E.D. Wright         (JPL)
  
  -Version
  
     -CSPICE Version 1.1.1, 10-AUG-2021 (JDR)
  
         Edited the header to comply with NAIF standard.
  
     -CSPICE Version 1.1.0, 27-AUG-1999 (NJB)
  
         Added check for null input string. Added some further comments
         to the -Brief_I/O and -Detailed_Output header sections.
  
     -CSPICE Version 1.0.0, 08-FEB-1998 (KRG) (IMU) (EDW)
  
  -Index_Entries
  
     last non-blank character
  
  -&
  */
  
  { /* Begin lastnb_c */
  
     /*
     Local variables
     */
     SpiceInt                 i;
  
  
  
     /*
     Check the input string pointer to make sure it's non-null.
     */
     CHKPTR_VAL ( CHK_DISCOVER, "lastnb_c", string, -1 );
  
  
     i = strlen(string) - 1;
  
  
     /*
     Start at the end of the string, moving backwards until a non blank
     character is found.  Once found return the index value.
     */
  
     while ( ( i >= 0 ) && ( string[i] == BLANK ) )
        {
        i--;
        }
  
  
     return i;
  
  
  } /* End lastnb_c */
  