/* spkw01.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__1 = 1;

/* $Procedure      SPKW01 ( Write SPK segment, type 1 ) */
/* Subroutine */ int spkw01_(integer *handle, integer *body, integer *center, 
	char *frame, doublereal *first, doublereal *last, char *segid, 
	integer *n, doublereal *dlines, doublereal *epochs, ftnlen frame_len, 
	ftnlen segid_len)
{
    /* System generated locals */
    integer i__1;
    doublereal d__1;

    /* Local variables */
    integer i__;
    extern /* Subroutine */ int chkin_(char *, ftnlen);
    doublereal descr[5];
    extern /* Subroutine */ int errch_(char *, char *, ftnlen, ftnlen), 
	    errdp_(char *, doublereal *, ftnlen), dafada_(doublereal *, 
	    integer *), dafbna_(integer *, doublereal *, char *, ftnlen), 
	    dafena_(void);
    extern logical failed_(void);
    integer chrcod, refcod;
    extern /* Subroutine */ int namfrm_(char *, integer *, ftnlen);
    extern integer lastnb_(char *, ftnlen);
    extern /* Subroutine */ int sigerr_(char *, ftnlen), chkout_(char *, 
	    ftnlen);
    doublereal maxtim;
    extern /* Subroutine */ int setmsg_(char *, ftnlen), errint_(char *, 
	    integer *, ftnlen), spkpds_(integer *, integer *, char *, integer 
	    *, doublereal *, doublereal *, doublereal *, ftnlen);
    extern logical return_(void);

/* $ Abstract */

/*     Write a type 1 segment to an SPK 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 */

/*     NAIF_IDS */
/*     SPK */
/*     TIME */

/* $ Keywords */

/*     EPHEMERIS */
/*     FILES */

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

/*     Variable  I/O  Description */
/*     --------  ---  -------------------------------------------------- */
/*     HANDLE     I   Handle of an SPK file open for writing. */
/*     BODY       I   NAIF code for an ephemeris object. */
/*     CENTER     I   NAIF code for center of motion of BODY. */
/*     FRAME      I   Reference frame name. */
/*     FIRST      I   Start time of interval covered by segment. */
/*     LAST       I   End time of interval covered by segment. */
/*     SEGID      I   Segment identifier. */
/*     N          I   Number of difference lines in segment. */
/*     DLINES     I   Array of difference lines. */
/*     EPOCHS     I   Coverage end times of difference lines. */

/* $ Detailed_Input */

/*     HANDLE         is the file handle of an SPK file that has been */
/*                    opened for writing. */

/*     BODY           is the NAIF integer code for an ephemeris object */
/*                    whose state relative to another body is described */
/*                    by the segment to be created. */

/*     CENTER         is the NAIF integer code for the center of motion */
/*                    of the object identified by BODY. */

/*     FRAME          is the NAIF name for a reference frame relative to */
/*                    which the state information for BODY is specified. */
/*     FIRST, */
/*     LAST           are, respectively, the start and stop times of */
/*                    the time interval over which the segment defines */
/*                    the state of BODY. */

/*     SEGID          is the segment identifier.  An SPK segment */
/*                    identifier may contain up to 40 characters. */

/*     N              is the number of difference lines in the input */
/*                    difference line array. */

/*     DLINES         contains a time-ordered array of difference lines */
/*                    The Ith difference line occupies elements (1,I) */
/*                    through (71,I) of DLINES.  Each difference line */
/*                    represents the state (x, y, z, dx/dt, dy/dt, */
/*                    dz/dt, in kilometers and kilometers per second) */
/*                    of BODY relative to CENTER, specified relative to */
/*                    FRAME, for an interval of time.  The time interval */
/*                    covered by the Ith difference line ends at the */
/*                    Ith element of the array EPOCHS (described below). */
/*                    The interval covered by the first difference line */
/*                    starts at the segment start time. */

/*                    The contents of a difference line are as shown */
/*                    below: */

/*                       Dimension  Description */
/*                       ---------  ---------------------------------- */
/*                       1          Reference epoch of difference line */
/*                       15         Stepsize function vector */
/*                       1          Reference position vector,  x */
/*                       1          Reference velocity vector,  x */
/*                       1          Reference position vector,  y */
/*                       1          Reference velocity vector,  y */
/*                       1          Reference position vector,  z */
/*                       1          Reference velocity vector,  z */
/*                       15,3       Modified divided difference */
/*                                  arrays (MDAs) */
/*                       1          Maximum integration order plus 1 */
/*                       3          Integration order array */

/*                    The reference position and velocity are those of */
/*                    BODY relative to CENTER at the reference epoch. */
/*                    (A difference line is essentially a polynomial */
/*                    expansion of acceleration about the reference */
/*                    epoch.) */


/*     EPOCHS         is an array of epochs corresponding to the members */
/*                    of the state array.  The epochs are specified as */
/*                    seconds past J2000, TDB. */

/*                    The first difference line covers the time interval */
/*                    from the segment start time to EPOCHS(1).  For */
/*                    I > 1, the Ith difference line covers the half-open */
/*                    time interval from, but not including, EPOCHS(I-1) */
/*                    through EPOCHS(I). */


/* $ Detailed_Output */

/*     None.  See $Particulars for a description of the effect of this */
/*     routine. */

/* $ Parameters */

/*     None. */

/* $ Exceptions */

/*     If any of the following exceptions occur, this routine will return */
/*     without creating a new segment. */

/*     1) If FRAME is not a recognized name, the error */
/*        SPICE(INVALIDREFFRAME) is signaled. */

/*     2) If the last non-blank character of SEGID occurs past index 40, */
/*        the error SPICE(SEGIDTOOLONG) is signaled. */

/*     3) If SEGID contains any nonprintable characters, the error */
/*        SPICE(NONPRINTABLECHARS) is signaled. */

/*     4) If the number of difference lines N is not at least one, */
/*        the error SPICE(INVALIDCOUNT) will be signaled. */

/*     5) If FIRST is greater than or equal to LAST then the error */
/*        SPICE(BADDESCRTIMES) will be signaled. */

/*     6) If the elements of the array EPOCHS are not in strictly */
/*        increasing order, the error SPICE(TIMESOUTOFORDER) will be */
/*        signaled. */

/*     7) If the last epoch EPOCHS(N) is less than LAST, the error */
/*        SPICE(BADDESCRTIMES) will be signaled. */

/* $ Files */

/*     A new type 1 SPK segment is written to the SPK file attached */
/*     to HANDLE. */

/* $ Particulars */

/*     This routine writes an SPK type 1 data segment to the open SPK */
/*     file according to the format described in the type 1 section of */
/*     the SPK Required Reading. The SPK file must have been opened with */
/*     write access. */

/* $ Examples */

/*     Suppose that you have difference lines and are prepared to */
/*     produce a segment of type 1 in an SPK file. */

/*     The following code fragment could be used to add the new segment */
/*     to a previously opened SPK file attached to HANDLE. The file must */
/*     have been opened with write access. */

/*        C */
/*        C     Create a segment identifier. */
/*        C */
/*                  SEGID = 'MY_SAMPLE_SPK_TYPE_1_SEGMENT' */

/*        C */
/*        C     Write the segment. */
/*        C */
/*              CALL SPKW01 (  HANDLE,  BODY,    CENTER,  FRAME, */
/*             .               FIRST,   LAST,    SEGID,   N, */
/*             .               DLINES,  EPOCHS                  ) */

/* $ Restrictions */

/*     1) The validity of the difference lines is not checked by */
/*        this routine. */

/* $ Literature_References */

/*     None. */

/* $ Author_and_Institution */

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

/* $ Version */

/* -    SPICELIB Version 1.0.0, 30-JAN-2003 (NJB) */

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

/*     write spk type_1 ephemeris data segment */

/* -& */

/*     SPICELIB functions */


/*     Local parameters */


/*     Local variables */


/*     Local variables */


/*     Standard SPICE error handling. */

    if (return_()) {
	return 0;
    } else {
	chkin_("SPKW01", (ftnlen)6);
    }

/*     Get the NAIF integer code for the reference frame. */

    namfrm_(frame, &refcod, frame_len);
    if (refcod == 0) {
	setmsg_("The reference frame # is not supported.", (ftnlen)39);
	errch_("#", frame, (ftnlen)1, frame_len);
	sigerr_("SPICE(INVALIDREFFRAME)", (ftnlen)22);
	chkout_("SPKW01", (ftnlen)6);
	return 0;
    }

/*     Check to see if the segment identifier is too long. */

    if (lastnb_(segid, segid_len) > 40) {
	setmsg_("Segment identifier contains more than 40 characters.", (
		ftnlen)52);
	sigerr_("SPICE(SEGIDTOOLONG)", (ftnlen)19);
	chkout_("SPKW01", (ftnlen)6);
	return 0;
    }

/*     Now check that all the characters in the segment identifier */
/*     can be printed. */

    i__1 = lastnb_(segid, segid_len);
    for (i__ = 1; i__ <= i__1; ++i__) {
	chrcod = *(unsigned char *)&segid[i__ - 1];
	if (chrcod < 32 || chrcod > 126) {
	    setmsg_("The segment identifier contains nonprintable characters",
		     (ftnlen)55);
	    sigerr_("SPICE(NONPRINTABLECHARS)", (ftnlen)24);
	    chkout_("SPKW01", (ftnlen)6);
	    return 0;
	}
    }

/*     The difference line count must be at least one. */

    if (*n < 1) {
	setmsg_("The difference line count was #; the count must be at least"
		" one.", (ftnlen)64);
	errint_("#", n, (ftnlen)1);
	sigerr_("SPICE(INVALIDCOUNT)", (ftnlen)19);
	chkout_("SPKW01", (ftnlen)6);
	return 0;
    }

/*     The segment stop time should be greater then the begin time. */

    if (*first >= *last) {
	setmsg_("The segment start time: # is greater then the segment end t"
		"ime: #", (ftnlen)65);
	errdp_("#", first, (ftnlen)1);
	errdp_("#", last, (ftnlen)1);
	sigerr_("SPICE(BADDESCRTIMES)", (ftnlen)20);
	chkout_("SPKW01", (ftnlen)6);
	return 0;
    }

/*     Make sure the epochs form a strictly increasing sequence. */

    maxtim = epochs[0];
    i__1 = *n;
    for (i__ = 2; i__ <= i__1; ++i__) {
	if (epochs[i__ - 1] <= maxtim) {
	    setmsg_("EPOCH # having index # is not greater than its predeces"
		    "sor #.", (ftnlen)61);
	    errdp_("#", &epochs[i__ - 1], (ftnlen)1);
	    errint_("#", &i__, (ftnlen)1);
	    errdp_("#", &epochs[i__ - 2], (ftnlen)1);
	    sigerr_("SPICE(TIMESOUTOFORDER)", (ftnlen)22);
	    chkout_("SPKW01", (ftnlen)6);
	    return 0;
	} else {
	    maxtim = epochs[i__ - 1];
	}
    }

/*     Make sure there's no gap between the last difference line */
/*     epoch and the end of the time interval defined by the segment */
/*     descriptor. */

    if (epochs[*n - 1] < *last) {
	setmsg_("Segment end time # follows last epoch #.", (ftnlen)40);
	errdp_("#", last, (ftnlen)1);
	errdp_("#", &epochs[*n - 1], (ftnlen)1);
	sigerr_("SPICE(BADDESCRTIMES)", (ftnlen)20);
	chkout_("SPKW01", (ftnlen)6);
	return 0;
    }

/*     If we made it this far, we're ready to start writing the segment. */


/*     Create the segment descriptor. */

    spkpds_(body, center, frame, &c__1, first, last, descr, frame_len);

/*     Begin a new segment. */

    dafbna_(handle, descr, segid, segid_len);
    if (failed_()) {
	chkout_("SPKW01", (ftnlen)6);
	return 0;
    }

/*     The type 1 segment structure is shown below: */

/*        +-----------------------+ */
/*        | Difference line 1     | */
/*        +-----------------------+ */
/*        | Difference line 2     | */
/*        +-----------------------+ */
/*                    . */
/*                    . */
/*                    . */
/*        +-----------------------+ */
/*        | Difference line N     | */
/*        +-----------------------+ */
/*        | Epoch 1               | */
/*        +-----------------------+ */
/*        | Epoch 2               | */
/*        +-----------------------+ */
/*                    . */
/*                    . */
/*                    . */
/*        +-----------------------+ */
/*        | Epoch N               | */
/*        +-----------------------+ */
/*        | Epoch 100             | (First directory) */
/*        +-----------------------+ */
/*                    . */
/*                    . */
/*                    . */
/*        +-----------------------+ */
/*        | Epoch (N/100)*100     | (Last directory) */
/*        +-----------------------+ */
/*        | Number of diff lines  | */
/*        +-----------------------+ */


    i__1 = *n * 71;
    dafada_(dlines, &i__1);
    dafada_(epochs, n);
    i__1 = *n / 100;
    for (i__ = 1; i__ <= i__1; ++i__) {
	dafada_(&epochs[i__ * 100 - 1], &c__1);
    }
    d__1 = (doublereal) (*n);
    dafada_(&d__1, &c__1);

/*     As long as nothing went wrong, end the segment. */

    if (! failed_()) {
	dafena_();
    }
    chkout_("SPKW01", (ftnlen)6);
    return 0;
} /* spkw01_ */

