/* insrti.f -- translated by f2c (version 19980913).
   You must link the resulting object file with the libraries:
	-lf2c -lm   (in that order)
*/

#include "f2c.h"

/* $Procedure      INSRTI ( Insert an item into an integer set ) */
/* Subroutine */ int insrti_(integer *item, integer *a)
{
    /* System generated locals */
    integer i__1;

    /* Local variables */
    integer card, last, size, i__;
    extern integer cardi_(integer *);
    extern /* Subroutine */ int chkin_(char *, ftnlen);
    extern integer sizei_(integer *);
    logical in;
    extern /* Subroutine */ int scardi_(integer *, integer *), sigerr_(char *,
	     ftnlen);
    extern integer lstlei_(integer *, integer *, integer *);
    extern /* Subroutine */ int chkout_(char *, ftnlen), setmsg_(char *, 
	    ftnlen), errint_(char *, integer *, ftnlen);
    extern logical return_(void);

/* $ Abstract */

/*      Insert an item into an integer set. */

/* $ 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 */

/*      SETS */

/* $ Keywords */

/*      CELLS, SETS */

/* $ Declarations */
/* $ Brief_I/O */

/*      VARIABLE  I/O  DESCRIPTION */
/*      --------  ---  -------------------------------------------------- */
/*      ITEM       I   Item to be inserted. */
/*      A         I/O  Insertion set. */

/* $ Detailed_Input */

/*      ITEM        is an item which is to be inserted into the */
/*                  specified set. ITEM may or may not already */
/*                  be an element of the set. */


/*      A           is a set. */


/*                  On input, A may or may not contain the input item */
/*                  as an element. */

/* $ Detailed_Output */

/*      A           on output contains the union of the input set and */
/*                  the singleton set containing the input item, unless */
/*                  there was not sufficient room in the set for the */
/*                  item to be included, in which case the set is not */
/*                  changed and an error is returned. */

/* $ Parameters */

/*      None. */

/* $ Exceptions */

/*     1) If the insertion of the element into the set causes an excess */
/*        of elements, the error SPICE(SETEXCESS) is signaled. */

/* $ Files */

/*      None. */

/* $ Particulars */

/*      None. */

/* $ Examples */

/*      In the following example, the element 'PLUTO' is removed from */
/*      the character set PLANETS and inserted into the character set */
/*      ASTEROIDS. */

/*            CALL REMOVC ( 'PLUTO', PLANETS   ) */
/*            CALL INSRTC ( 'PLUTO', ASTEROIDS ) */

/*      If 'PLUTO' is not an element of PLANETS, then the contents of */
/*      PLANETS are not changed. Similarly, if 'PLUTO' is already an */
/*      element of ASTEROIDS, the contents of ASTEROIDS remain unchanged. */

/*      Because inserting an element into a set can increase the */
/*      cardinality of the set, an error may occur in the insertion */
/*      routines. */

/* $ Restrictions */

/*      None. */

/* $ Literature_References */

/*      None. */

/* $ Author_and_Institution */

/*      N.J. Bachman    (JPL) */
/*      C.A. Curzon     (JPL) */
/*      W.L. Taber      (JPL) */
/*      I.M. Underwood  (JPL) */

/* $ Version */

/* -    SPICELIB Version 2.0.0, 01-NOV-2005 (NJB) */

/*        Code was modified slightly to keep logical structure parallel */
/*        to that of INSRTC. */

/*        Long error message was updated to include size of */
/*        set into which insertion was attempted. */

/* -    SPICELIB Version 1.0.1, 10-MAR-1992 (WLT) */

/*        Comment section for permuted index source lines was added */
/*        following the header. */

/* -    SPICELIB Version 1.0.0, 31-JAN-1990 (CAC) (WLT) (IMU) */

/* -& */
/* $ Index_Entries */

/*     insert an item into an integer set */

/* -& */
/* $ Revisions */

/* -    SPICELIB Version 2.0.0, 01-NOV-2005 (NJB) */

/*        Code was modified slightly to keep logical structure parallel */
/*        to that of INSRTC. */

/*        Long error message was updated to include size of set into */
/*        which insertion was attempted. */

/* -    Beta Version 1.1.0, 06-JAN-1989 (NJB) */

/*        Calling protocol of EXCESS changed.  Call to SETMSG removed. */

/* -& */

/*     SPICELIB functions */


/*     Local variables */


/*     Set up the error processing. */

    if (return_()) {
	return 0;
    }
    chkin_("INSRTI", (ftnlen)6);

/*     What are the size and cardinality of the set? */

    size = sizei_(a);
    card = cardi_(a);

/*     Find the last element of the set which would come before the */
/*     input item. This will be the item itself, if it is already an */
/*     element of the set. */

    last = lstlei_(item, &card, &a[6]);

/*     Is the item already in the set? If not, it needs to be inserted. */

    if (last > 0) {
	in = a[last + 5] == *item;
    } else {
	in = FALSE_;
    }
    if (! in) {

/*        If there is room in the set for the new element, then move */
/*        the succeeding elements back to make room. And update the */
/*        cardinality for future reference. */

	if (card < size) {
	    i__1 = last + 1;
	    for (i__ = card; i__ >= i__1; --i__) {
		a[i__ + 6] = a[i__ + 5];
	    }
	    a[last + 6] = *item;
	    i__1 = card + 1;
	    scardi_(&i__1, a);
	} else {
	    setmsg_("An element could not be inserted into the set due to la"
		    "ck of space; set size is #.", (ftnlen)82);
	    errint_("#", &size, (ftnlen)1);
	    sigerr_("SPICE(SETEXCESS)", (ftnlen)16);
	}
    }
    chkout_("INSRTI", (ftnlen)6);
    return 0;
} /* insrti_ */

