/*
 * Copyright (c) 1999-2000 Image Power, Inc. and the University of
 *   British Columbia.
 * Copyright (c) 2001-2003 Michael David Adams.
 * All rights reserved.
 */

/* __START_OF_JASPER_LICENSE__
 *
 * JasPer License Version 2.0
 *
 * Copyright (c) 2001-2006 Michael David Adams
 * Copyright (c) 1999-2000 Image Power, Inc.
 * Copyright (c) 1999-2000 The University of British Columbia
 *
 * All rights reserved.
 *
 * Permission is hereby granted, free of charge, to any person (the
 * "User") obtaining a copy of this software and associated documentation
 * files (the "Software"), to deal in the Software without restriction,
 * including without limitation the rights to use, copy, modify, merge,
 * publish, distribute, and/or sell copies of the Software, and to permit
 * persons to whom the Software is furnished to do so, subject to the
 * following conditions:
 *
 * 1.  The above copyright notices and this permission notice (which
 * includes the disclaimer below) shall be included in all copies or
 * substantial portions of the Software.
 *
 * 2.  The name of a copyright holder shall not be used to endorse or
 * promote products derived from the Software without specific prior
 * written permission.
 *
 * THIS DISCLAIMER OF WARRANTY CONSTITUTES AN ESSENTIAL PART OF THIS
 * LICENSE.  NO USE OF THE SOFTWARE IS AUTHORIZED HEREUNDER EXCEPT UNDER
 * THIS DISCLAIMER.  THE SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS
 * "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
 * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
 * PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.  IN NO
 * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, OR ANY SPECIAL
 * INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES WHATSOEVER RESULTING
 * FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT,
 * NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION
 * WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.  NO ASSURANCES ARE
 * PROVIDED BY THE COPYRIGHT HOLDERS THAT THE SOFTWARE DOES NOT INFRINGE
 * THE PATENT OR OTHER INTELLECTUAL PROPERTY RIGHTS OF ANY OTHER ENTITY.
 * EACH COPYRIGHT HOLDER DISCLAIMS ANY LIABILITY TO THE USER FOR CLAIMS
 * BROUGHT BY ANY OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL
 * PROPERTY RIGHTS OR OTHERWISE.  AS A CONDITION TO EXERCISING THE RIGHTS
 * GRANTED HEREUNDER, EACH USER HEREBY ASSUMES SOLE RESPONSIBILITY TO SECURE
 * ANY OTHER INTELLECTUAL PROPERTY RIGHTS NEEDED, IF ANY.  THE SOFTWARE
 * IS NOT FAULT-TOLERANT AND IS NOT INTENDED FOR USE IN MISSION-CRITICAL
 * SYSTEMS, SUCH AS THOSE USED IN THE OPERATION OF NUCLEAR FACILITIES,
 * AIRCRAFT NAVIGATION OR COMMUNICATION SYSTEMS, AIR TRAFFIC CONTROL
 * SYSTEMS, DIRECT LIFE SUPPORT MACHINES, OR WEAPONS SYSTEMS, IN WHICH
 * THE FAILURE OF THE SOFTWARE OR SYSTEM COULD LEAD DIRECTLY TO DEATH,
 * PERSONAL INJURY, OR SEVERE PHYSICAL OR ENVIRONMENTAL DAMAGE ("HIGH
 * RISK ACTIVITIES").  THE COPYRIGHT HOLDERS SPECIFICALLY DISCLAIM ANY
 * EXPRESS OR IMPLIED WARRANTY OF FITNESS FOR HIGH RISK ACTIVITIES.
 *
 * __END_OF_JASPER_LICENSE__
 */

/*
 * $Id: jpc_util.c,v 1.2 2008-05-26 09:40:52 vp153 Exp $
 */

/******************************************************************************\
* Includes
\******************************************************************************/

#include <assert.h>
#include <stdio.h>
#include <string.h>
#include <math.h>
#include <stdlib.h>
#include <stdarg.h>

#include "jasper/jas_math.h"
#include "jasper/jas_malloc.h"

#include "jpc_fix.h"
#include "jpc_cs.h"
#include "jpc_flt.h"
#include "jpc_util.h"

/******************************************************************************\
* Miscellaneous Functions
\******************************************************************************/

int jpc_atoaf(char *s, int *numvalues, double **values)
{
    static char delim[] = ", \t\n";
    char buf[4096];
    int n;
    double *vs;
    char *cp;

    strncpy(buf, s, sizeof(buf));
    buf[sizeof(buf) - 1] = '\0';
    n = 0;
    if ((cp = strtok(buf, delim))) {
        ++n;
        while ((cp = strtok(0, delim))) {
            if (cp != '\0') {
                ++n;
            }
        }
    }

    if (n) {
        if (!(vs = jas_alloc2(n, sizeof(double)))) {
            return -1;
        }

        strncpy(buf, s, sizeof(buf));
        buf[sizeof(buf) - 1] = '\0';
        n = 0;
        if ((cp = strtok(buf, delim))) {
            vs[n] = atof(cp);
            ++n;
            while ((cp = strtok(0, delim))) {
                if (cp != '\0') {
                    vs[n] = atof(cp);
                    ++n;
                }
            }
        }
    } else {
        vs = 0;
    }

    *numvalues = n;
    *values = vs;

    return 0;
}

jas_seq_t *jpc_seq_upsample(jas_seq_t *x, int m)
{
    jas_seq_t *z;
    int i;

    if (!(z = jas_seq_create(jas_seq_start(x) * m, (jas_seq_end(x) - 1) * m + 1)))
        return 0;
    for (i = jas_seq_start(z); i < jas_seq_end(z); i++) {
        *jas_seq_getref(z, i) = (!JAS_MOD(i, m)) ? jas_seq_get(x, i / m) :
          jpc_inttofix(0);
    }

    return z;
}

jpc_fix_t jpc_seq_norm(jas_seq_t *x)
{
    jpc_fix_t s;
    int i;

    s = jpc_inttofix(0);
    for (i = jas_seq_start(x); i < jas_seq_end(x); i++) {
        s = jpc_fix_add(s, jpc_fix_mul(jas_seq_get(x, i), jas_seq_get(x, i)));
    }

    return jpc_dbltofix(sqrt(jpc_fixtodbl(s)));
}

jas_seq_t *jpc_seq_conv(jas_seq_t *x, jas_seq_t *y)
{
    int i;
    int j;
    int k;
    jas_seq_t *z;
    jpc_fix_t s;
    jpc_fix_t v;

    z = jas_seq_create(jas_seq_start(x) + jas_seq_start(y),
      jas_seq_end(x) + jas_seq_end(y) - 1);
    assert(z);
    for (i = jas_seq_start(z); i < jas_seq_end(z); i++) {
        s = jpc_inttofix(0);
        for (j = jas_seq_start(y); j < jas_seq_end(y); j++) {
            k = i - j;
            if (k < jas_seq_start(x) || k >= jas_seq_end(x)) {
                v = JPC_FIX_ZERO;
            } else {
                v = jas_seq_get(x, k);
            }
            s = jpc_fix_add(s, jpc_fix_mul(jas_seq_get(y, j), v));
        }
        *jas_seq_getref(z, i) = s;
    }

    return z;
}