/*
 * Copyright (c) 1999-2000 Image Power, Inc. and the University of
 *   British Columbia.
 * Copyright (c) 2001-2002 Michael David Adams.
 * All rights reserved.
 */

/* __START_OF_JASPER_LICENSE__
 *
 * JasPer Software License
 *
 * IMAGE POWER JPEG-2000 PUBLIC LICENSE
 * ************************************
 *
 * GRANT:
 *
 * Permission is hereby granted, free of charge, to any person (the "User")
 * obtaining a copy of this software and associated documentation, to deal
 * in the JasPer Software without restriction, including without limitation
 * the right to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the JasPer Software (in source and binary forms),
 * and to permit persons to whom the JasPer Software is furnished to do so,
 * provided further that the License Conditions below are met.
 *
 * License Conditions
 * ******************
 *
 * A.  Redistributions of source code must retain the above copyright notice,
 * and this list of conditions, and the following disclaimer.
 *
 * B.  Redistributions in binary form must reproduce the above copyright
 * notice, and this list of conditions, and the following disclaimer in
 * the documentation and/or other materials provided with the distribution.
 *
 * C.  Neither the name of Image Power, Inc. nor any other contributor
 * (including, but not limited to, the University of British Columbia and
 * Michael David Adams) may be used to endorse or promote products derived
 * from this software without specific prior written permission.
 *
 * D.  User agrees that it shall not commence any action against Image Power,
 * Inc., the University of British Columbia, Michael David Adams, or any
 * other contributors (collectively "Licensors") for infringement of any
 * intellectual property rights ("IPR") held by the User in respect of any
 * technology that User owns or has a right to license or sublicense and
 * which is an element required in order to claim compliance with ISO/IEC
 * 15444-1 (i.e., JPEG-2000 Part 1).  "IPR" means all intellectual property
 * rights worldwide arising under statutory or common law, and whether
 * or not perfected, including, without limitation, all (i) patents and
 * patent applications owned or licensable by User; (ii) rights associated
 * with works of authorship including copyrights, copyright applications,
 * copyright registrations, mask work rights, mask work applications,
 * mask work registrations; (iii) rights relating to the protection of
 * trade secrets and confidential information; (iv) any right analogous
 * to those set forth in subsections (i), (ii), or (iii) and any other
 * proprietary rights relating to intangible property (other than trademark,
 * trade dress, or service mark rights); and (v) divisions, continuations,
 * renewals, reissues and extensions of the foregoing (as and to the extent
 * applicable) now existing, hereafter filed, issued or acquired.
 *
 * E.  If User commences an infringement action against any Licensor(s) then
 * such Licensor(s) shall have the right to terminate User's license and
 * all sublicenses that have been granted hereunder by User to other parties.
 *
 * F.  This software is for use only in hardware or software products that
 * are compliant with ISO/IEC 15444-1 (i.e., JPEG-2000 Part 1).  No license
 * or right to this Software is granted for products that do not comply
 * with ISO/IEC 15444-1.  The JPEG-2000 Part 1 standard can be purchased
 * from the ISO.
 *
 * THIS DISCLAIMER OF WARRANTY CONSTITUTES AN ESSENTIAL PART OF THIS LICENSE.
 * NO USE OF THE JASPER SOFTWARE IS AUTHORIZED HEREUNDER EXCEPT UNDER
 * THIS DISCLAIMER.  THE JASPER SOFTWARE IS PROVIDED BY THE LICENSORS AND
 * CONTRIBUTORS UNDER THIS LICENSE ON AN ``AS-IS'' BASIS, WITHOUT WARRANTY
 * OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, WITHOUT LIMITATION,
 * WARRANTIES THAT THE JASPER SOFTWARE IS FREE OF DEFECTS, IS MERCHANTABLE,
 * IS FIT FOR A PARTICULAR PURPOSE OR IS NON-INFRINGING.  THOSE INTENDING
 * TO USE THE JASPER SOFTWARE OR MODIFICATIONS THEREOF FOR USE IN HARDWARE
 * OR SOFTWARE PRODUCTS ARE ADVISED THAT THEIR USE MAY INFRINGE EXISTING
 * PATENTS, COPYRIGHTS, TRADEMARKS, OR OTHER INTELLECTUAL PROPERTY RIGHTS.
 * THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE JASPER SOFTWARE
 * IS WITH THE USER.  SHOULD ANY PART OF THE JASPER SOFTWARE PROVE DEFECTIVE
 * IN ANY RESPECT, THE USER (AND NOT THE INITIAL DEVELOPERS, THE UNIVERSITY
 * OF BRITISH COLUMBIA, IMAGE POWER, INC., MICHAEL DAVID ADAMS, OR ANY
 * OTHER CONTRIBUTOR) SHALL ASSUME THE COST OF ANY NECESSARY SERVICING,
 * REPAIR OR CORRECTION.  UNDER NO CIRCUMSTANCES AND UNDER NO LEGAL THEORY,
 * WHETHER TORT (INCLUDING NEGLIGENCE), CONTRACT, OR OTHERWISE, SHALL THE
 * INITIAL DEVELOPER, THE UNIVERSITY OF BRITISH COLUMBIA, IMAGE POWER, INC.,
 * MICHAEL DAVID ADAMS, ANY OTHER CONTRIBUTOR, OR ANY DISTRIBUTOR OF THE
 * JASPER SOFTWARE, OR ANY SUPPLIER OF ANY OF SUCH PARTIES, BE LIABLE TO
 * THE USER OR ANY OTHER PERSON FOR ANY INDIRECT, SPECIAL, INCIDENTAL, OR
 * CONSEQUENTIAL DAMAGES OF ANY CHARACTER INCLUDING, WITHOUT LIMITATION,
 * DAMAGES FOR LOSS OF GOODWILL, WORK STOPPAGE, COMPUTER FAILURE OR
 * MALFUNCTION, OR ANY AND ALL OTHER COMMERCIAL DAMAGES OR LOSSES, EVEN IF
 * SUCH PARTY HAD BEEN INFORMED, OR OUGHT TO HAVE KNOWN, OF THE POSSIBILITY
 * OF SUCH DAMAGES.  THE JASPER SOFTWARE AND UNDERLYING TECHNOLOGY ARE NOT
 * FAULT-TOLERANT AND ARE NOT DESIGNED, MANUFACTURED OR INTENDED FOR USE OR
 * RESALE AS ON-LINE CONTROL EQUIPMENT IN HAZARDOUS ENVIRONMENTS REQUIRING
 * FAIL-SAFE PERFORMANCE, SUCH AS IN THE OPERATION OF NUCLEAR FACILITIES,
 * AIRCRAFT NAVIGATION OR COMMUNICATION SYSTEMS, AIR TRAFFIC CONTROL, DIRECT
 * LIFE SUPPORT MACHINES, OR WEAPONS SYSTEMS, IN WHICH THE FAILURE OF THE
 * JASPER SOFTWARE OR UNDERLYING TECHNOLOGY OR PRODUCT COULD LEAD DIRECTLY
 * TO DEATH, PERSONAL INJURY, OR SEVERE PHYSICAL OR ENVIRONMENTAL DAMAGE
 * ("HIGH RISK ACTIVITIES").  LICENSOR SPECIFICALLY DISCLAIMS ANY EXPRESS
 * OR IMPLIED WARRANTY OF FITNESS FOR HIGH RISK ACTIVITIES.  USER WILL NOT
 * KNOWINGLY USE, DISTRIBUTE OR RESELL THE JASPER SOFTWARE OR UNDERLYING
 * TECHNOLOGY OR PRODUCTS FOR HIGH RISK ACTIVITIES AND WILL ENSURE THAT ITS
 * CUSTOMERS AND END-USERS OF ITS PRODUCTS ARE PROVIDED WITH A COPY OF THE
 * NOTICE SPECIFIED IN THIS SECTION.
 *
 * __END_OF_JASPER_LICENSE__
 */

/*
 * $Id$
 */

/*****************************************************************************\
* 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
\*****************************************************************************/

static unsigned int
countOfTokens(const char * const s,
			  const char * const delim) {

	unsigned int n;
	char buf[4096];
	const char * cp;

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



int
jpc_atoaf(const char * const s,
		  int *        const numvaluesP,
		  double **    const valuesP) {
/*----------------------------------------------------------------------------
   Parse a string like "3.2,9,-5".  Return as *numvaluesP the number of
   values in the string and as *valuesP a malloced array of the values.

   But if the string is empty (*numvaluesP is zero), return *valuesP NULL.

   Delimiters can be comma as in the example or space, tab, or newline.
-----------------------------------------------------------------------------*/
	char const delim[] = ", \t\n";

	unsigned int const valueCt = countOfTokens(s, delim);

	if (valueCt > 0) {
		unsigned int i;
		double * vs;
		const char * cp;
		char buf[4096];

		if (!(vs = jas_malloc(valueCt * sizeof(double)))) {
			return -1;
		}

		strncpy(buf, s, sizeof(buf));
		buf[sizeof(buf) - 1] = '\0';
		i = 0;
		if ((cp = strtok(buf, delim))) {
			vs[i] = atof(cp);
			++i;
			while ((cp = strtok(0, delim))) {
				if (cp[0] != '\0') {
					vs[i] = atof(cp);
					++i;
				}
			}
		}
		assert(i == valueCt);
		*numvaluesP = valueCt;
		*valuesP    = vs;
	} else {
		*valuesP    = NULL;
		*numvaluesP = 0;
	}
	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;
}
