62 lines
1.8 KiB
C
62 lines
1.8 KiB
C
/**********
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Copyright 1990 Regents of the University of California. All rights reserved.
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Author: 1985 Wayne A. Christopher, U. C. Berkeley CAD Group
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**********/
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/*
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* Polynomial interpolation code.
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*/
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#include "ngspice/ngspice.h"
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#include "ngspice/cpdefs.h"
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#include "ngspice/ftedefs.h"
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#include "ngspice/dvec.h"
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#include "interp.h"
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void
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lincopy(struct dvec *ov, double *newscale, int newlen, struct dvec *oldscale)
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{
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if (!isreal(ov)) {
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fprintf(cp_err, "Warning: vector %s is a complex vector - "
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"complex vectors cannot be interpolated\n",
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ov->v_name);
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return;
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}
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if (ov->v_length == 1) {
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fprintf(cp_err, "Warning: %s is a scalar - "
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"interpolation is not possible\n",
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ov->v_name);
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return;
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}
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if (ov->v_length < oldscale->v_length) {
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fprintf(cp_err, "Warning: %s only contains %d points - "
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"interpolation is not performed unless there are "
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"at least as many points as the scale vector (%d)\n",
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ov->v_name, ov->v_length, oldscale->v_length);
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return;
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}
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/* Allocate the vector to receive the linearized data */
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struct dvec * const v = dvec_alloc(copy(ov->v_name),
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ov->v_type,
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ov->v_flags | VF_PERMANENT,
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newlen, NULL);
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/* Do interpolation and then add the vector to the current plot. If
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* interpolation fails, the vector must be freed. */
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if (!ft_interpolate(ov->v_realdata, v->v_realdata, oldscale->v_realdata,
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oldscale->v_length, newscale, newlen, 1)) {
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fprintf(cp_err, "Error: can't interpolate %s\n", ov->v_name);
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dvec_free(v);
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return;
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}
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vec_new(v);
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} /* end of function lincopy */
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