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/* Copyright (C) 2013, 2017 D.V. Wiebe
*
***************************************************************************
*
* This file is part of the GetData project.
*
* GetData is free software; you can redistribute it and/or modify it under
* the terms of the GNU Lesser General Public License as published by the
* Free Software Foundation; either version 2.1 of the License, or (at your
* option) any later version.
*
* GetData is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
* License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with GetData; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "test.h"
#define F(x) sqrt(((x) + 600.) / 500.)
/* inverse of F(x) via linear interpolation between x and x+1 */
#define G(x,y) (x + ((y - F(x)) / (F(x+1) - F(x))))
int main(void)
{
const char *filedir = "dirfile";
const char *format = "dirfile/format";
const char *data = "dirfile/data";
double d[1000], f1, f2, f3;
int i, error, r = 0;
DIRFILE *D;
rmdirfile();
mkdir(filedir, 0700);
for (i = 0; i < 1000; ++i)
d[i] = F(i);
MAKEFORMATFILE(format, "data RAW FLOAT64 1\n");
i = open(data, O_CREAT | O_EXCL | O_WRONLY | O_BINARY, 0666);
write(i, d, 1000 * sizeof(double));
close(i);
D = gd_open(filedir, GD_RDONLY | GD_VERBOSE);
f1 = gd_framenum_subset(D, "data", 1.09, 100, 800);
f2 = gd_framenum_subset(D, "data", 1.49, 100, 800);
f3 = gd_framenum_subset(D, "data", 1.79, 100, 800);
error = gd_error(D);
gd_discard(D);
unlink(data);
unlink(format);
rmdir(filedir);
CHECKI(error, 0);
CHECKF(f1, G( 100, 1.09)); /* = -10.3339841573191 */
CHECKF(f2, G( 510, 1.49)); /* = 510.050010695549 */
CHECKF(f3, G( 798, 1.79)); /* = 995.067417578234 */
return r;
}
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