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

#include "f2c.h"

/* Table of constant values */

static integer c__2 = 2;
static integer c__6 = 6;

/* $Procedure      CKCOV ( CK coverage ) */
/* Subroutine */ int ckcov_(char *ck, integer *idcode, logical *needav, char *
	level, doublereal *tol, char *timsys, doublereal *cover, ftnlen 
	ck_len, ftnlen level_len, ftnlen timsys_len)
{
    /* System generated locals */
    integer i__1;
    doublereal d__1;

    /* Builtin functions */
    integer s_cmp(char *, char *, ftnlen, ftnlen), s_rnge(char *, integer, 
	    char *, integer);

    /* Local variables */
    char arch[80];
    logical avok;
    extern /* Subroutine */ int sct2e_(integer *, doublereal *, doublereal *);
    integer i__;
    extern /* Subroutine */ int dafgs_(doublereal *);
    integer clkid;
    extern /* Subroutine */ int chkin_(char *, ftnlen);
    doublereal descr[5];
    extern /* Subroutine */ int dafus_(doublereal *, integer *, integer *, 
	    doublereal *, integer *), errch_(char *, char *, ftnlen, ftnlen);
    doublereal dctol[2];
    logical istdb, found;
    extern /* Subroutine */ int errdp_(char *, doublereal *, ftnlen);
    integer dtype;
    extern logical eqstr_(char *, char *, ftnlen, ftnlen);
    doublereal dc[2];
    integer ic[6];
    extern /* Subroutine */ int daffna_(logical *);
    extern logical failed_(void);
    extern /* Subroutine */ int dafbfs_(integer *);
    doublereal et;
    integer handle, segbeg;
    extern /* Subroutine */ int dafcls_(integer *), ckmeta_(integer *, char *,
	     integer *, ftnlen);
    integer segend;
    extern /* Subroutine */ int getfat_(char *, char *, char *, ftnlen, 
	    ftnlen, ftnlen), dafopr_(char *, integer *, ftnlen), sigerr_(char 
	    *, ftnlen);
    logical seglvl;
    extern /* Subroutine */ int chkout_(char *, ftnlen), setmsg_(char *, 
	    ftnlen), wninsd_(doublereal *, doublereal *, doublereal *), 
	    errint_(char *, integer *, ftnlen);
    char kertyp[80];
    extern logical return_(void);
    extern /* Subroutine */ int zzckcv01_(integer *, integer *, integer *, 
	    integer *, doublereal *, char *, doublereal *, ftnlen), zzckcv02_(
	    integer *, integer *, integer *, integer *, doublereal *, char *, 
	    doublereal *, ftnlen), zzckcv03_(integer *, integer *, integer *, 
	    integer *, doublereal *, char *, doublereal *, ftnlen), zzckcv04_(
	    integer *, integer *, integer *, integer *, doublereal *, char *, 
	    doublereal *, ftnlen), zzckcv05_(integer *, integer *, integer *, 
	    integer *, doublereal *, doublereal *, char *, doublereal *, 
	    ftnlen);

/* $ Abstract */

/*     Find the coverage window for a specified object in a specified CK */
/*     file. */

/* $ 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 */

/*     CELLS */
/*     DAF */
/*     CK */
/*     TIME */
/*     WINDOWS */

/* $ Keywords */

/*     POINTING */
/*     TIME */
/*     UTILITY */

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

/*     Variable  I/O  Description */
/*     --------  ---  -------------------------------------------------- */
/*     CK         I   Name of CK file. */
/*     IDCODE     I   ID code of object. */
/*     NEEDAV     I   Flag indicating whether angular velocity is needed. */
/*     LEVEL      I   Coverage level:  'SEGMENT' OR 'INTERVAL'. */
/*     TOL        I   Tolerance in ticks. */
/*     TIMSYS     I   Time system used to represent coverage. */
/*     COVER     I/O  Window giving coverage for IDCODE. */

/* $ Detailed_Input */

/*     CK             is the name of a C-kernel. */

/*     IDCODE         is the integer ID code of an object, normally */
/*                    a spacecraft structure or instrument, for which */
/*                    pointing data are expected to exist in the */
/*                    specified CK file. */

/*     NEEDAV         is a logical variable indicating whether only */
/*                    segments having angular velocity are to be */
/*                    considered when determining coverage.  When */
/*                    NEEDAV is .TRUE., segments without angular */
/*                    velocity don't contribute to the coverage */
/*                    window; when NEEDAV is .FALSE., all segments for */
/*                    IDCODE may contribute to the coverage window. */


/*     LEVEL          is the level (granularity) at which the coverage */
/*                    is examined.  Allowed values and corresponding */
/*                    meanings are: */

/*                       'SEGMENT'    The output coverage window */
/*                                    contains intervals defined by the */
/*                                    start and stop times of segments */
/*                                    for the object designated by */
/*                                    IDCODE. */

/*                       'INTERVAL'   The output coverage window */
/*                                    contains interpolation intervals */
/*                                    of segments for the object */
/*                                    designated by IDCODE.  For type 1 */
/*                                    segments, which don't have */
/*                                    interpolation intervals, each */
/*                                    epoch associated with a pointing */
/*                                    instance is treated as a singleton */
/*                                    interval; these intervals are */
/*                                    added to the coverage window. */

/*                                    All interpolation intervals are */
/*                                    considered to lie within the */
/*                                    segment bounds for the purpose of */
/*                                    this summary:  if an interpolation */
/*                                    interval extends beyond the */
/*                                    segment coverage interval, only */
/*                                    its intersection with the segment */
/*                                    coverage interval is considered to */
/*                                    contribute to the total coverage. */


/*     TOL            is a tolerance value expressed in ticks of the */
/*                    spacecraft clock associated with IDCODE.  Before */
/*                    each interval is inserted into the coverage */
/*                    window, the interval is intersected with the */
/*                    segment coverage interval, then if the */
/*                    intersection is non-empty, it is expanded by TOL: */
/*                    the left endpoint of the intersection interval is */
/*                    reduced by TOL and the right endpoint is increased */
/*                    by TOL. Adjusted interval endpoints, when */
/*                    expressed as encoded SCLK, never are less than */
/*                    zero ticks.  Any intervals that overlap as a */
/*                    result of the expansion are merged. */

/*                    The coverage window returned when TOL > 0 */
/*                    indicates the coverage provided by the file to the */
/*                    CK readers CKGPAV and CKGP when that value of TOL */
/*                    is passed to them as an input. */


/*     TIMSYS         is a string indicating the time system used */
/*                    in the output coverage window.  TIMSYS may */
/*                    have the values: */

/*                        'SCLK'    Elements of COVER are expressed in */
/*                                  encoded SCLK ("ticks"), where the */
/*                                  clock is associated with the object */
/*                                  designated by IDCODE. */

/*                        'TDB'     Elements of COVER are expressed as */
/*                                  seconds past J2000 TDB. */


/*     COVER          is an initialized SPICELIB window data structure. */
/*                    COVER optionally may contain coverage data on */
/*                    input; on output, the data already present in */
/*                    COVER will be combined with coverage found for the */
/*                    object designated by IDCODE in the file CK. */

/*                    If COVER contains no data on input, its size and */
/*                    cardinality still must be initialized. */

/* $ Detailed_Output */

/*     COVER          is a SPICELIB window data structure which */
/*                    represents the merged coverage for IDCODE. When */
/*                    the coverage level is 'INTERVAL', this is the set */
/*                    of time intervals for which data for IDCODE are */
/*                    present in the file CK, merged with the set of */
/*                    time intervals present in COVER on input.  The */
/*                    merged coverage is represented as the union of one */
/*                    or more disjoint time intervals.  The window COVER */
/*                    contains the pairs of endpoints of these */
/*                    intervals. */

/*                    When the coverage level is 'SEGMENT', COVER is */
/*                    computed in a manner similar to that described */
/*                    above, but the coverage intervals used in the */
/*                    computation are those of segments rather than */
/*                    interpolation intervals within segments. */

/*                    When TOL is > 0, the intervals comprising the */
/*                    coverage window for IDCODE are expanded by TOL and */
/*                    any intervals overlapping as a result are merged. */
/*                    The resulting window is returned in COVER.  The */
/*                    expanded window in no case extends beyond the */
/*                    segment bounds in either direction by more than */
/*                    TOL. */

/*                    The interval endpoints contained in COVER are */
/*                    encoded spacecraft clock times if TIMSYS is */
/*                    'SCLK'; otherwise the times are converted from */
/*                    encoded spacecraft clock to seconds past J2000 */
/*                    TDB. */

/*                    See the Examples section below for a complete */
/*                    example program showing how to retrieve the */
/*                    endpoints from COVER. */

/* $ Parameters */

/*     None. */

/* $ Exceptions */

/*     1)  If the input file has transfer format, the error */
/*         SPICE(INVALIDFORMAT) is signaled. */

/*     2)  If the input file is not a transfer file but has architecture */
/*         other than DAF, the error SPICE(BADARCHTYPE) is signaled. */

/*     3)  If the input file is a binary DAF file of type other than */
/*         CK, the error SPICE(BADFILETYPE) is signaled. */

/*     4)  If the CK file cannot be opened or read, the error will */
/*         be diagnosed by routines called by this routine. The output */
/*         window will not be modified. */

/*     5)  If the size of the output WINDOW argument COVER is */
/*         insufficient to contain the actual number of intervals in the */
/*         coverage window for IDCODE, the error will be diagnosed by */
/*         routines called by this routine. */

/*     6)  If TOL is negative, the error SPICE(VALUEOUTOFRANGE) is */
/*         signaled. */

/*     7)  If LEVEL is not recognized, the error SPICE(INVALIDOPTION) */
/*         is signaled. */

/*     8)  If TIMSYS is not recognized, the error SPICE(NOTSUPPORTED) */
/*         is signaled. */

/*     9)  If a time conversion error occurs, the error will be */
/*         diagnosed by a routine in the call tree of this routine. */

/*     10) If the output time system is TDB, the CK subsystem must be */
/*         able to map IDCODE to the ID code of the associated */
/*         spacecraft clock.  If this mapping cannot be performed, the */
/*         error will be diagnosed by a routine in the call tree of this */
/*         routine. */

/* $ Files */

/*     This routine reads a C-kernel. */

/*     If the output time system is 'TDB', then a leapseconds kernel */
/*     and an SCLK kernel for the spacecraft clock associated with */
/*     IDCODE must be loaded before this routine is called. */

/*     If the ID code of the clock associated with IDCODE is not */
/*     equal to */

/*        IDCODE / 1000 */

/*     then the kernel variable */

/*        CK_<IDCODE>_SCLK */

/*     must be present in the kernel pool to identify the clock */
/*     associated with IDCODE.  This variable must contain the ID code */
/*     to be used for conversion between SCLK and TDB. Normally this */
/*     variable is provided in a text kernel loaded via FURNSH. */

/* $ Particulars */

/*     This routine provides an API via which applications can determine */
/*     the coverage a specified CK file provides for a specified */
/*     object. */

/* $ Examples */

/*     1)  Display the interval-level coverage for each object in a */
/*         specified CK file. Use tolerance of zero ticks. Do not */
/*         request angular velocity. Express the results in the TDB time */
/*         system. */

/*         Find the set of objects in the file. Loop over the contents */
/*         of the ID code set:  find the coverage for each item in the */
/*         set and display the coverage. */


/*              PROGRAM CKCVR */
/*              IMPLICIT NONE */

/*        C */
/*        C     SPICELIB functions */
/*        C */
/*              INTEGER               WNCARD */
/*              INTEGER               CARDI */
/*        C */
/*        C     Local parameters */
/*        C */
/*        C */
/*        C     Declare the coverage window.  Make enough room */
/*        C     for MAXIV intervals. */
/*        C */
/*              INTEGER               FILSIZ */
/*              PARAMETER           ( FILSIZ = 255 ) */

/*              INTEGER               LBCELL */
/*              PARAMETER           ( LBCELL = -5 ) */

/*              INTEGER               MAXIV */
/*              PARAMETER           ( MAXIV  = 100000 ) */

/*              INTEGER               WINSIZ */
/*              PARAMETER           ( WINSIZ = 2 * MAXIV ) */

/*              INTEGER               TIMLEN */
/*              PARAMETER           ( TIMLEN = 50 ) */

/*              INTEGER               MAXOBJ */
/*              PARAMETER           ( MAXOBJ = 1000 ) */

/*        C */
/*        C     Local variables */
/*        C */
/*              CHARACTER*(FILSIZ)    CK */
/*              CHARACTER*(FILSIZ)    LSK */
/*              CHARACTER*(FILSIZ)    SCLK */
/*              CHARACTER*(TIMLEN)    TIMSTR */

/*              DOUBLE PRECISION      B */
/*              DOUBLE PRECISION      COVER ( LBCELL : WINSIZ ) */
/*              DOUBLE PRECISION      E */

/*              INTEGER               I */
/*              INTEGER               IDS   ( LBCELL : MAXOBJ ) */
/*              INTEGER               J */
/*              INTEGER               NIV */

/*        C */
/*        C     Load a leapseconds kernel and SCLK kernel for output */
/*        C     time conversion.  Note that we assume a single spacecraft */
/*        C     clock is associated with all of the objects in the CK. */
/*        C */
/*              CALL PROMPT ( 'Name of leapseconds kernel > ', LSK  ) */
/*              CALL FURNSH ( LSK ) */

/*              CALL PROMPT ( 'Name of SCLK kernel        > ', SCLK ) */
/*              CALL FURNSH ( SCLK ) */

/*        C */
/*        C     Get name of CK file. */
/*        C */
/*              CALL PROMPT ( 'Name of CK file            > ', CK ) */

/*        C */
/*        C     Initialize the set IDS. */
/*        C */
/*              CALL SSIZEI ( MAXOBJ, IDS ) */

/*        C */
/*        C     Initialize the window COVER. */
/*        C */
/*              CALL SSIZED ( WINSIZ, COVER ) */

/*        C */
/*        C     Find the set of objects in the CK file. */
/*        C */
/*              CALL CKOBJ ( CK, IDS ) */

/*        C */
/*        C     We want to display the coverage for each object.  Loop */
/*        C     over the contents of the ID code set, find the coverage */
/*        C     for each item in the set, and display the coverage. */
/*        C */
/*              DO I = 1, CARDI( IDS ) */
/*        C */
/*        C        Find the coverage window for the current */
/*        C        object. Empty the coverage window each time */
/*        C        so we don't include data for the previous object. */
/*        C */
/*                 CALL SCARDD ( 0,   COVER ) */
/*                 CALL CKCOV  ( CK,          IDS(I),  .FALSE., */
/*             .                 'INTERVAL',  0.D0,    'TDB',    COVER ) */

/*        C */
/*        C        Get the number of intervals in the coverage */
/*        C        window. */
/*        C */
/*                 NIV = WNCARD( COVER ) */

/*        C */
/*        C        Display a simple banner. */
/*        C */
/*                 WRITE (*,*) '========================================' */
/*                 WRITE (*,*) 'Coverage for object ', IDS(I) */

/*        C */
/*        C        Convert the coverage interval start and stop */
/*        C        times to TDB calendar strings. */
/*        C */
/*                 DO J = 1, NIV */
/*        C */
/*        C           Get the endpoints of the Jth interval. */
/*        C */
/*                    CALL WNFETD ( COVER, J, B, E ) */
/*        C */
/*        C           Convert the endpoints to TDB calendar */
/*        C           format time strings and display them. */
/*        C */
/*                    CALL TIMOUT ( B, */
/*             .                    'YYYY MON DD HR:MN:SC.###### ' // */
/*             .                    '(TDB) ::TDB', */
/*             .                    TIMSTR                           ) */
/*                    WRITE (*,*) ' ' */
/*                    WRITE (*,*) 'Interval: ', J */
/*                    WRITE (*,*) 'Start:    ', TIMSTR */

/*                    CALL TIMOUT ( E, */
/*             .                    'YYYY MON DD HR:MN:SC.###### ' // */
/*             .                    '(TDB) ::TDB', */
/*             .                    TIMSTR                          ) */
/*                    WRITE (*,*) 'Stop:     ', TIMSTR */
/*                    WRITE (*,*) ' ' */

/*                 END DO */

/*                 WRITE (*,*) '========================================' */

/*              END DO */

/*              END */


/*     2)  Find the segment-level coverage for the object designated by */
/*         IDCODE provided by the set of CK files loaded via a */
/*         metakernel. (The metakernel must also specify leapseconds and */
/*         SCLK kernels.)  Use tolerance of zero ticks. Do not request */
/*         angular velocity. Express the results in the TDB time system. */

/*              PROGRAM CKMET */
/*              IMPLICIT NONE */
/*        C */
/*        C     SPICELIB functions */
/*        C */
/*              INTEGER               WNCARD */

/*        C */
/*        C     Local parameters */
/*        C */
/*              INTEGER               LBCELL */
/*              PARAMETER           ( LBCELL = -5 ) */

/*              INTEGER               FILSIZ */
/*              PARAMETER           ( FILSIZ = 255 ) */

/*              INTEGER               LNSIZE */
/*              PARAMETER           ( LNSIZE = 80 ) */

/*              INTEGER               MAXCOV */
/*              PARAMETER           ( MAXCOV = 100000 ) */

/*              INTEGER               TIMLEN */
/*              PARAMETER           ( TIMLEN = 50 ) */

/*        C */
/*        C     Local variables */
/*        C */
/*              CHARACTER*(FILSIZ)    FILE */
/*              CHARACTER*(LNSIZE)    IDCH */
/*              CHARACTER*(FILSIZ)    META */
/*              CHARACTER*(FILSIZ)    SOURCE */
/*              CHARACTER*(TIMLEN)    TIMSTR */
/*              CHARACTER*(LNSIZE)    TYPE */

/*              DOUBLE PRECISION      B */
/*              DOUBLE PRECISION      COVER  ( LBCELL : 2*MAXCOV ) */
/*              DOUBLE PRECISION      E */

/*              INTEGER               COUNT */
/*              INTEGER               HANDLE */
/*              INTEGER               I */
/*              INTEGER               IDCODE */
/*              INTEGER               NIV */

/*              LOGICAL               FOUND */

/*        C */
/*        C     Prompt for the metakernel name; load the metakernel. */
/*        C     The metakernel lists the CK files whose coverage */
/*        C     for IDCODE we'd like to determine.  The metakernel */
/*        C     must also specify a leapseconds kernel and an SCLK */
/*        C     kernel for the clock associated with IDCODE. */
/*        C */
/*              CALL PROMPT ( 'Enter name of metakernel > ', META ) */

/*              CALL FURNSH ( META ) */

/*        C */
/*        C     Get the ID code of interest. */
/*        C */
/*              CALL PROMPT ( 'Enter ID code            > ', IDCH ) */

/*              CALL PRSINT ( IDCH,  IDCODE ) */

/*        C */
/*        C     Initialize the coverage window. */
/*        C */
/*              CALL SSIZED ( MAXCOV, COVER ) */

/*        C */
/*        C     Find out how many kernels are loaded.  Loop over the */
/*        C     kernels:  for each loaded CK file, add its coverage */
/*        C     for IDCODE, if any, to the coverage window. */
/*        C */
/*              CALL KTOTAL ( 'CK', COUNT ) */

/*              DO I = 1, COUNT */

/*                 CALL KDATA ( I,       'CK',    FILE,  TYPE, */
/*             .                SOURCE,  HANDLE,  FOUND       ) */

/*                 CALL CKCOV  (  FILE,       IDCODE,  .FALSE., */
/*             .                  'SEGMENT',  0.0,     'TDB',    COVER ) */

/*              END DO */

/*        C */
/*        C     Display results. */
/*        C */
/*        C     Get the number of intervals in the coverage */
/*        C     window. */
/*        C */
/*              NIV = WNCARD( COVER ) */

/*        C */
/*        C     Display a simple banner. */
/*        C */
/*              WRITE (*,*) ' ' */
/*              WRITE (*,*) 'Coverage for object ', IDCODE */

/*        C */
/*        C     Convert the coverage interval start and stop */
/*        C     times to TDB calendar strings. */
/*        C */
/*              DO I = 1, NIV */
/*        C */
/*        C        Get the endpoints of the Ith interval. */
/*        C */
/*                 CALL WNFETD ( COVER, I, B, E ) */
/*        C */
/*        C        Convert the endpoints to TDB calendar */
/*        C        format time strings and display them. */
/*        C */
/*                 CALL TIMOUT ( B, */
/*             .                 'YYYY MON DD HR:MN:SC.###### ' // */
/*             .                 '(TDB) ::TDB', */
/*             .                 TIMSTR                           ) */
/*                 WRITE (*,*) ' ' */
/*                 WRITE (*,*) 'Interval: ', I */
/*                 WRITE (*,*) 'Start:    ', TIMSTR */

/*                 CALL TIMOUT ( E, */
/*             .                 'YYYY MON DD HR:MN:SC.###### ' // */
/*             .                 '(TDB) ::TDB', */
/*             .                 TIMSTR                           ) */
/*                 WRITE (*,*) 'Stop:     ', TIMSTR */
/*                 WRITE (*,*) ' ' */

/*              END DO */

/*              END */


/* $ Restrictions */

/*     1) When this routine is used to accumulate coverage for IDCODE */
/*        provided by multiple CK files, the inputs NEEDAV, LEVEL, TOL, */
/*        and TIMSYS  must have the same values for all files in order */
/*        for the result to be meaningful. */

/* $ Literature_References */

/*     None. */

/* $ Author_and_Institution */

/*     N.J. Bachman   (JPL) */

/* $ Version */

/* -    SPICELIB Version 1.0.1, 30-NOV-2007 (NJB) */

/*        Corrected bug in first program in header Examples section: */
/*        program now empties the coverage window prior to collecting */
/*        data for the current object. Updated examples to use WNCARD */
/*        rather than CARDD. */

/* -    SPICELIB Version 1.0.0, 07-JAN-2005 (NJB) */

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

/*     get coverage window for ck object */

/* -& */

/*     SPICELIB functions */


/*     Local parameters */


/*     Local variables */


/*     Standard SPICE error handling. */

    if (return_()) {
	return 0;
    }
    chkin_("CKCOV", (ftnlen)5);

/*     Check tolerance value. */

    if (*tol < 0.) {
	setmsg_("Tolerance must be non-negative; actual value was #.", (
		ftnlen)51);
	errdp_("#", tol, (ftnlen)1);
	sigerr_("SPICE(VALUEOUTOFRANGE)", (ftnlen)22);
	chkout_("CKCOV", (ftnlen)5);
	return 0;
    }

/*     Use a logical flag to indicate whether this is a segment-level */
/*     coverage description. */

    seglvl = eqstr_(level, "SEGMENT", level_len, (ftnlen)7);

/*     Check coverage level keyword. */

    if (! (seglvl || eqstr_(level, "INTERVAL", level_len, (ftnlen)8))) {
	setmsg_("Allowed values of LEVEL are # and #; actual value was #.", (
		ftnlen)56);
	errch_("#", "SEGMENT", (ftnlen)1, (ftnlen)7);
	errch_("#", "INTERVAL", (ftnlen)1, (ftnlen)8);
	errch_("#", level, (ftnlen)1, level_len);
	sigerr_("SPICE(INVALIDOPTION)", (ftnlen)20);
	chkout_("CKCOV", (ftnlen)5);
	return 0;
    }

/*     See whether GETFAT thinks we've got a CK file. */

    getfat_(ck, arch, kertyp, ck_len, (ftnlen)80, (ftnlen)80);
    if (s_cmp(arch, "XFR", (ftnlen)80, (ftnlen)3) == 0) {
	setmsg_("Input file # has architecture #. The file must be a binary "
		"CK file to be readable by this routine.  If the input file i"
		"s an CK file in transfer format, run TOBIN on the file to co"
		"nvert it to binary format.", (ftnlen)205);
	errch_("#", ck, (ftnlen)1, ck_len);
	errch_("#", arch, (ftnlen)1, (ftnlen)80);
	sigerr_("SPICE(INVALIDFORMAT)", (ftnlen)20);
	chkout_("CKCOV", (ftnlen)5);
	return 0;
    } else if (s_cmp(arch, "DAF", (ftnlen)80, (ftnlen)3) != 0) {
	setmsg_("Input file # has architecture #. The file must be a binary "
		"CK file to be readable by this routine.  Binary CK files hav"
		"e DAF architecture.  If you expected the file to be a binary"
		" CK file, the problem may be due to the file being an old no"
		"n-native file lacking binary file format information. It's a"
		"lso possible the file has been corrupted.", (ftnlen)340);
	errch_("#", ck, (ftnlen)1, ck_len);
	errch_("#", arch, (ftnlen)1, (ftnlen)80);
	sigerr_("SPICE(INVALIDARCHTYPE)", (ftnlen)22);
	chkout_("CKCOV", (ftnlen)5);
	return 0;
    } else if (s_cmp(kertyp, "CK", (ftnlen)80, (ftnlen)2) != 0) {
	setmsg_("Input file # has file type #. The file must be a binary CK "
		"file to be readable by this routine. If you expected the fil"
		"e to be a binary CK file, the problem may be due to the file"
		" being an old non-native file lacking binary file format inf"
		"ormation. It's also possible the file has been corrupted.", (
		ftnlen)296);
	errch_("#", ck, (ftnlen)1, ck_len);
	errch_("#", kertyp, (ftnlen)1, (ftnlen)80);
	sigerr_("SPICE(INVALIDFILETYPE)", (ftnlen)22);
	chkout_("CKCOV", (ftnlen)5);
	return 0;
    }

/*     Set a logical flag indicating whether the time systm is SCLK. */

    istdb = eqstr_(timsys, "TDB", timsys_len, (ftnlen)3);

/*     Check time system. */

    if (! istdb) {
	if (! eqstr_(timsys, "SCLK", timsys_len, (ftnlen)4)) {
	    setmsg_("Time system spec TIMSYS was #; allowed values are SCLK "
		    "and TDB.", (ftnlen)63);
	    errch_("#", timsys, (ftnlen)1, timsys_len);
	    sigerr_("SPICE(NOTSUPPORTED)", (ftnlen)19);
	    chkout_("CKCOV", (ftnlen)5);
	    return 0;
	}
    }

/*     If the output time system is TDB, find the clock ID associated */
/*     with IDCODE. */

    if (istdb) {
	ckmeta_(idcode, "SCLK", &clkid, (ftnlen)4);
	if (failed_()) {
	    chkout_("CKCOV", (ftnlen)5);
	    return 0;
	}
    }

/*     Open the file for reading. */

    dafopr_(ck, &handle, ck_len);
    if (failed_()) {
	chkout_("CKCOV", (ftnlen)5);
	return 0;
    }

/*     We will examine each segment descriptor in the file, and */
/*     we'll update our coverage bounds according to the data found */
/*     in these descriptors. */

/*     If TOL > 0, we'll apply TOL after we've found the coverage */
/*     for the zero-tolerance case. */

/*     If the time system is TDB, we'll convert the times to TDB */
/*     at the end of this routine. */

/*     Start a forward search. */

    dafbfs_(&handle);

/*     Find the next DAF array. */

    daffna_(&found);
    while(found) {

/*        Note:  we check FAILED() at the bottom of this loop; this */
/*        routine returns if FAILED() returns .TRUE. at that point. */

/*        Fetch and unpack the segment descriptor. */

	dafgs_(descr);
	dafus_(descr, &c__2, &c__6, dc, ic);

/*        Let AVOK indicate whether the segment satisfies the */
/*        angular velocity restriction. */

	avok = ic[3] == 1 || ! (*needav);
	if (ic[0] == *idcode && avok) {

/*           This segment is for the body of interest.  If angular */
/*           velocity is needed, this segment has it. */

	    if (seglvl) {

/*              This is a segment-level summary. */

/*              Insert the coverage bounds into the coverage window. */
/*              Adjust the interval using the tolerance. */

/* Computing MAX */
		d__1 = dc[0] - *tol;
		dctol[0] = max(d__1,0.);
		dctol[1] = dc[1] + *tol;

/*              Convert the time to TDB if necessary. */

		if (istdb) {

/*                 Convert the time bounds to TDB before inserting */
/*                 into the window. */

		    for (i__ = 1; i__ <= 2; ++i__) {
			sct2e_(&clkid, &dctol[(i__1 = i__ - 1) < 2 && 0 <= 
				i__1 ? i__1 : s_rnge("dctol", i__1, "ckcov_", 
				(ftnlen)868)], &et);
			dctol[(i__1 = i__ - 1) < 2 && 0 <= i__1 ? i__1 : 
				s_rnge("dctol", i__1, "ckcov_", (ftnlen)869)] 
				= et;
		    }
		}
		if (dctol[0] <= dctol[1]) {
		    wninsd_(dctol, &dctol[1], cover);
		}
	    } else {

/*              We're looking for an interval-level coverage window. */
/*              This information must be retrieved in a */
/*              data-type-dependent fashion.  The coverage routines */
/*              we'll call will, if necessary, adjust intervals by TOL */
/*              and convert interval times to TDB. */

		dtype = ic[2];
		segbeg = ic[4];
		segend = ic[5];
		if (dtype == 1) {
		    zzckcv01_(&handle, &segbeg, &segend, &clkid, tol, timsys, 
			    cover, timsys_len);
		} else if (dtype == 2) {
		    zzckcv02_(&handle, &segbeg, &segend, &clkid, tol, timsys, 
			    cover, timsys_len);
		} else if (dtype == 3) {
		    zzckcv03_(&handle, &segbeg, &segend, &clkid, tol, timsys, 
			    cover, timsys_len);
		} else if (dtype == 4) {
		    zzckcv04_(&handle, &segbeg, &segend, &clkid, tol, timsys, 
			    cover, timsys_len);
		} else if (dtype == 5) {

/*                 Note:  this calling sequence is exceptional; the */
/*                 segment bounds are an input. */

		    zzckcv05_(&handle, &segbeg, &segend, &clkid, dc, tol, 
			    timsys, cover, timsys_len);
		} else {
		    setmsg_("Supported CK data types are 1, 2, 3, 4, 5.  Dat"
			    "a type of segment: #. This problem may indicate "
			    "that you need to update your SPICE Toolkit.", (
			    ftnlen)138);
		    errint_("#", &dtype, (ftnlen)1);
		    sigerr_("SPICE(NOTSUPPORTED)", (ftnlen)19);
		    chkout_("CKCOV", (ftnlen)5);
		    return 0;
		}
	    }
	}
	daffna_(&found);
	if (failed_()) {
	    chkout_("CKCOV", (ftnlen)5);
	    return 0;
	}
    }

/*     COVER now represents the coverage of the entire file at the */
/*     granularity indicated by LEVEL, combined with the coverage */
/*     contained in COVER on input. */

/*     Release the file. */

    dafcls_(&handle);
    chkout_("CKCOV", (ftnlen)5);
    return 0;
} /* ckcov_ */

