gauthier
c7518ecf42
git-svn-id: http://svn.eurecom.fr/openair4G/trunk@7885 818b1a75-f10b-46b9-bf7c-635c3b92a50f
54 lines
1.7 KiB
C
54 lines
1.7 KiB
C
/*******************************************************************************
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OpenAirInterface
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Copyright(c) 1999 - 2014 Eurecom
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OpenAirInterface is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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OpenAirInterface is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with OpenAirInterface.The full GNU General Public License is
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included in this distribution in the file called "COPYING". If not,
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see <http://www.gnu.org/licenses/>.
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Contact Information
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OpenAirInterface Admin: openair_admin@eurecom.fr
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OpenAirInterface Tech : openair_tech@eurecom.fr
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OpenAirInterface Dev : openair4g-devel@lists.eurecom.fr
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Address : Eurecom, Campus SophiaTech, 450 Route des Chappes, CS 50193 - 06904 Biot Sophia Antipolis cedex, FRANCE
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*******************************************************************************/
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double interp(double x, double *xs, double *ys, int count)
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{
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int i;
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double dx, dy;
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if (x < xs[0]) {
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return 1.0; /* return minimum element */
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}
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if (x > xs[count-1]) {
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return 0.0; /* return maximum */
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}
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/* find i, such that xs[i] <= x < xs[i+1] */
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for (i = 0; i < count-1; i++) {
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if (xs[i+1] > x) {
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break;
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}
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}
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/* interpolate */
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dx = xs[i+1] - xs[i];
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dy = ys[i+1] - ys[i];
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return ys[i] + (x - xs[i]) * dy / dx;
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}
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