/* nbwid.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            NBWID ( Non-blank width of a character array ) */
integer nbwid_(char *array, integer *nelt, ftnlen array_len)
{
    /* System generated locals */
    integer ret_val;

    /* Builtin functions */
    integer i_len(char *, ftnlen);

    /* Local variables */
    integer i__, j, strlen;

/* $ Abstract */

/*     Determine the non-blank width of a character array---that is, */
/*     the largest value of LASTNB for any element in the array. */

/* $ 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 */

/*     ARRAY, CHARACTER */

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

/*     VARIABLE  I/O  DESCRIPTION */
/*     --------  ---  -------------------------------------------------- */
/*     ARRAY      I   Input array. */
/*     NELT       I   Number of elements in the array. */
/*     NBWID      O   Maximum value of LASTNB for the array. */

/* $ Detailed_Input */

/*     ARRAY       is the input array. */

/*     NELT        is the number of elements in the input array. */

/* $ Detailed_Output */

/*     NBWID       is the index of the rightmost non-blank character */
/*                 in the entire array. This is equivalent to the */
/*                 maximum value of LASTNB for the array, but somewhat */
/*                 more efficient to compute. If NELT is not greater */
/*                 than zero, NBWID is zero. */

/* $ Parameters */

/*     None. */

/* $ Particulars */

/*     Find the last non-blank character in the first element of the */
/*     array. Search the rest of the elements, starting at the end of */
/*     each string and moving back just far enough to determine if the */
/*     current string is wider than any of the previous ones. (This */
/*     makes NBWID somewhat more efficient than LASTNB.) */

/*     If any of the strings is found to contain no trailing blanks, */
/*     NBWID is just the length of the individual elements of the array, */
/*     and the search is terminated immediately. */

/* $ Examples */

/*     Let ARRAY contain the following strings. */

/*           ARRAY(1) = 'A string of medium length                      ' */
/*           ARRAY(2) = 'A very long string, much longer than the rest  ' */
/*           ARRAY(3) = 'Shorter                                        ' */
/*           ARRAY(4) = 'Short                                          ' */

/*     Then the value returned by */

/*           WIDEST = NBWID ( ARRAY, 4 ) */

/*     is 45. */

/*     If the word 'rest' in the second element is changed to 'others', */
/*     the value returned is 47, and the search is terminated after the */
/*     second element. */

/* $ Restrictions */

/*     None. */

/* $ Exceptions */

/*      Error free. */

/* $ Files */

/*     None. */

/* $ Author_and_Institution */

/*     I.M. Underwood  (JPL) */

/* $ Literature_References */

/*     None. */

/* $ Version */

/* -     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 (IMU) */

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

/*     non-blank width of a character array */

/* -& */

/*     Local variables */


/*     Nonsense case: no elements. */

    if (*nelt < 1) {
	ret_val = 0;

/*     Get the length of the individual elements of the string. */
/*     So far, we have no maximum width, because we haven't examined */
/*     any elements. */

    } else {
	strlen = i_len(array, array_len);
	ret_val = 0;
	i__ = 0;

/*        Continue until the end of the array is reached, or until */
/*        a string with no trailing blanks is found. */

	while(i__ < *nelt && ret_val < strlen) {

/*           Search no further than the current value of NBWID. */

	    ++i__;
	    j = strlen;
	    while(j > ret_val && *(unsigned char *)&array[(i__ - 1) * 
		    array_len + (j - 1)] == ' ') {
		--j;
	    }

/*           NBWID only increases if this string was wider than all */
/*           previous strings. */

	    ret_val = max(ret_val,j);
	}
    }
    return ret_val;
} /* nbwid_ */

