/* Copyright 2015. The Regents of the University of California.
 * Copyright 2015-2020. Martin Uecker.
 * All rights reserved. Use of this source code is governed by
 * a BSD-style license which can be found in the LICENSE file.
 *
 * Authors:
 * 2015-2020 Martin Uecker
 */

#include <complex.h>
#include <assert.h>

#include "num/multind.h"
#include "num/init.h"

#include "misc/mmio.h"
#include "misc/misc.h"
#include "misc/opts.h"

#define DIMS 16

#ifndef CFL_SIZE
#define CFL_SIZE sizeof(complex float)
#endif

static const char usage_str[] = "flags dim1 ... dimN <input> <output>";
static const char help_str[] = "Reshape selected dimensions.\n";


int main_reshape(int argc, char* argv[argc])
{
	cmdline(&argc, argv, 3, 100, usage_str, help_str, 0, NULL);

	num_init();

	unsigned long flags = atol(argv[1]);
	unsigned int n = bitcount(flags);

	assert((int)n + 3 == argc - 1);

	long in_dims[DIMS];
	long out_dims[DIMS];

	complex float* in_data = load_cfl(argv[n + 2], DIMS, in_dims);

	md_copy_dims(DIMS, out_dims, in_dims);
	
	unsigned int j = 0;

	for (unsigned int i = 0; i < DIMS; i++)
		if (MD_IS_SET(flags, i))
			out_dims[i] = atoi(argv[j++ + 2]);

	assert(j == n);

	complex float* out_data = create_cfl(argv[n + 3], DIMS, out_dims);

	md_reshape(DIMS, flags, out_dims, out_data, in_dims, in_data, CFL_SIZE);

	unmap_cfl(DIMS, in_dims, in_data);
	unmap_cfl(DIMS, out_dims, out_data);

	return 0;
}


