doplot.c

spice中支持多层次元件模型仿真的可单独运行的插件源码

            if (dd[1] > xlims[1])
                xlims[1] = dd[1];
        }
    } else {
        xlims[0] = HUGE;
        xlims[1] = - xlims[0];
        for (d = vecs; d; d = d->v_link2) {
            dd = ft_minmax(d->v_scale, true);
            if (dd[0] < xlims[0])
                xlims[0] = dd[0];
            if (dd[1] > xlims[1])
                xlims[1] = dd[1];
        }
        for (d = vecs; d; d = d->v_link2) {
            if (d->v_scale->v_flags & VF_MINGIVEN)
                if (xlims[0] < d->v_scale->v_minsignal)
                    xlims[0] = d->v_scale->v_minsignal;
            if (d->v_scale->v_flags & VF_MAXGIVEN)
                if (xlims[1] > d->v_scale->v_maxsignal)
                    xlims[1] = d->v_scale->v_maxsignal;
        }
    }

    /* Do some coercion of the limits to make them reasonable. */
    if ((xlims[0] == 0) && (xlims[1] == 0)) {
        xlims[0] = -1.0;
        xlims[1] = 1.0;
    }
    if ((ylims[0] == 0) && (ylims[1] == 0)) {
        ylims[0] = -1.0;
        ylims[1] = 1.0;
    }
    if (xlims[0] > xlims[1]) {
        tt = xlims[1];
        xlims[1] = xlims[0];
        xlims[0] = tt;
    }
    if (ylims[0] > ylims[1]) {
        tt = ylims[1];
        ylims[1] = ylims[0];
        ylims[0] = tt;
    }
    if (xlims[0] == xlims[1]) {
        xlims[0] *= (xlims[0] > 0) ? 0.9 : 1.1;
        xlims[1] *= (xlims[1] > 0) ? 1.1 : 0.9;
    }
    if (ylims[0] == ylims[1]) {
	    /* || fabs(ylims[0])/(ylims[1]-ylims[0]) > 1.0e9
	    || fabs(ylims[1])/(ylims[1]-ylims[0]) > 1.0e9) */
        ylims[0] *= (ylims[0] > 0) ? 0.9 : 1.1;
        ylims[1] *= (ylims[1] > 0) ? 1.1 : 0.9;
    }

#ifdef notdef
    /* Now shrink the limits very slightly -- this helps prevent round-off
     * error from doing bad things.
     */
    if (gtype != GRID_LOGLOG && gtype != GRID_XLOG
	    && gtype != GRID_POLAR && gtype != GRID_SMITH)
    {
        tt = xlims[1] - xlims[0];
        xlims[0] += tt * 0.001;
        xlims[1] -= tt * 0.001;
    }
    if (gtype != GRID_LOGLOG && gtype != GRID_YLOG
	    && gtype != GRID_POLAR && gtype != GRID_SMITH) {
        tt = ylims[1] - ylims[0];
        ylims[0] += tt * 0.001;
        ylims[1] -= tt * 0.001;
    }
#endif

    if ((xlims[0] <= 0.0) && ((gtype == GRID_XLOG) ||
            (gtype == GRID_LOGLOG))) {
        fprintf(cp_err, 
            "Error: X values must be > 0 for log scale\n");
        return (false);
    }
    if ((ylims[0] <= 0.0) && ((gtype == GRID_YLOG) ||
            (gtype == GRID_LOGLOG))) {
        fprintf(cp_err, 
            "Error: Y values must be > 0 for log scale\n");
        return (false);
    }

    /* Fix the plot limits for smith and polar grids. */
    if ((!xlim || !ylim) && (gtype == GRID_POLAR)) {
        /* (0,0) must be in the center of the screen. */
        mx = (fabs(xlims[0]) > fabs(xlims[1])) ? fabs(xlims[0]) :
                fabs(xlims[1]);
        my = (fabs(ylims[0]) > fabs(ylims[1])) ? fabs(ylims[0]) :
                fabs(ylims[1]);
        rad = (mx > my) ? mx : my;
        /* rad = sqrt(mx * mx + my * my); */
        xlims[0] = - rad;
        xlims[1] = rad;
        ylims[0] = - rad;
        ylims[1] = rad;
    } else if ((!xlim || !ylim) && (gtype == GRID_SMITH
        || gtype == GRID_SMITHGRID))
    {
#ifdef notdef
	/* Let the user zoom in */
        mx = (fabs(xlims[0]) > fabs(xlims[1])) ? fabs(xlims[0]) :
                fabs(xlims[1]);
        my = (fabs(ylims[0]) > fabs(ylims[1])) ? fabs(ylims[0]) :
                fabs(ylims[1]);
        rad = (mx > my) ? mx : my;
	/* XXX */
        xlims[0] = - rad;
        xlims[1] = rad;
        ylims[0] = - rad;
        ylims[1] = rad;
#endif
        xlims[0] = -1.0;
        xlims[1] = 1.0;
        ylims[0] = -1.0;
        ylims[1] = 1.0;
    }

    /* We don't want to try to deal with smith plots for asciiplot. */
    if (devname && eq(devname, "lpr")) {
        /* check if we should (can) linearize */
        if (!(!ft_curckt || !ft_curckt->ci_ckt ||
            strcmp(ft_curckt->ci_name, plot_cur->pl_title) ||
            !if_tranparams(ft_curckt, &tstart, &tstop, &tstep) ||
            ((tstop - tstart) * tstep <= 0.0) ||
            ((tstop - tstart) < tstep) ||
            !plot_cur || !plot_cur->pl_dvecs ||
            !plot_cur->pl_scale ||
            !isreal(plot_cur->pl_scale) ||
            !ciprefix("tran", plot_cur->pl_typename))) {

          newlen = (tstop - tstart) / tstep + 1.5;

          newscale = (double *) tmalloc(newlen * sizeof(double));

          newv_scale = alloc(struct dvec);
          newv_scale->v_flags = vecs->v_scale->v_flags;
          newv_scale->v_type = vecs->v_scale->v_type;
          newv_scale->v_gridtype = vecs->v_scale->v_gridtype;
          newv_scale->v_length = newlen;
          newv_scale->v_name = copy(vecs->v_scale->v_name);
          newv_scale->v_realdata = newscale;

          for (i = 0, ttime = tstart; i < newlen; i++, ttime += tstep)
            newscale[i] = ttime;

          for (v = vecs; v; v= v->v_link2) {
            newdata = (double *) tmalloc(newlen * sizeof (double));

            if (!ft_interpolate(v->v_realdata, newdata,
                v->v_scale->v_realdata, v->v_scale->v_length,
            newscale, newlen, 1)) {
            fprintf(cp_err,
                "Error: can't interpolate %s\n", v->v_name);
            return(false);
            }

            tfree(v->v_realdata);
            v->v_realdata = newdata;

            /* Why go to all this trouble if agraf ignores it? */
            nointerp = true;
          }

          vecs->v_scale = newv_scale;

        }
        ft_agraf(xlims, ylims, vecs->v_scale, vecs->v_plot, vecs, 
            xdelta ? *xdelta : 0.0, ydelta ? *ydelta : 0.0,
            ((gtype == GRID_XLOG) || (gtype == GRID_LOGLOG)),
            ((gtype == GRID_YLOG) || (gtype == GRID_LOGLOG)),
            nointerp);
        return (true);
    }

    /* See if there is one type we can give for the y scale... */
    for (j = vecs->v_type, d = vecs->v_link2; d; d = d->v_link2)
        if (d->v_type != j) {
            j = SV_NOTYPE;
            break;
        }

    if (devname && eq(devname, "xgraph")) {
	/* Interface to XGraph-11 Plot Program */
	ft_xgraph(xlims, ylims, hcopy,
	    title ? title : vecs->v_plot->pl_title,
	    xlabel ? xlabel : ft_typabbrev(vecs->v_scale->v_type),
	    ylabel ? ylabel : ft_typabbrev(j),
	    gtype, ptype, vecs);
	return (true);
    }
    for (d = vecs, i = 0; d; d = d->v_link2)
        i++;

    /* Figure out the X name and the X type.  This is sort of bad... */
    xn = vecs->v_scale->v_name;
    xt = vecs->v_scale->v_type;

    pname = plot_cur->pl_typename;

    if (!gr_init(xlims, ylims, (oneval ? (char *) NULL : xn),
            title ? title : vecs->v_plot->pl_title, hcopy, i,
            xdelta ? *xdelta : 0.0, ydelta ? *ydelta : 0.0, gtype,
            ptype, xlabel, ylabel, xt, j, pname, cline))
        return (false);

    /* Now plot all the graphs. */
    for (d = vecs; d; d = d->v_link2)
        ft_graf(d, oneval ? (struct dvec *) NULL : d->v_scale, false);

    gr_clean();
#ifdef HAS_MFB
    if (!strcmp(dispdev->name, "MFB"))
	MFBHalt( );
#endif
    return (true);
}

/* This routine gets parameters from the command line, which are of the
 * form "name number ..." It returns a pointer to the parameter values.
 */

static double *
getlims(wl, name, number)
    wordlist *wl;
    char *name;
    int number;
{
    double *d, *td;
    wordlist *beg, *wk;
    char *ss;
    int n;

    for (beg = wl; beg; beg = beg->wl_next) {
        if (eq(beg->wl_word, name)) {
            if (beg == wl) {
                fprintf(cp_err,
			"Syntax error: looking for plot parameters \"%s\".\n",
			name);
                return (NULL);
            }
            wk = beg;
            if (number) {
                d = (double *) tmalloc(sizeof (double) *
                        number);
                for (n = 0; n < number; n++) {
                    wk = wk->wl_next;
                    if (!wk) {
                        fprintf(cp_err,
                            "Syntax error: not enough parameters for \"%s\".\n",
			    name);
                        return (NULL);
                    }
                    ss = wk->wl_word;
                    td = ft_numparse(&ss, false);
                    if (td == NULL)
                        goto bad;
                    d[n] = *td;
                }
            } else
                /* Minor hack... */
                d = (double  *) 1;

            if (beg->wl_prev)
                beg->wl_prev->wl_next = wk->wl_next;
            if (wk->wl_next) {
                wk->wl_next->wl_prev = beg->wl_prev;
                wk->wl_next = NULL;
            }
	    if (beg != wl_root)
		wl_free(beg);
            return (d);
        }
    }
    return (NULL);
bad:
    fprintf(cp_err, "Syntax error: bad parameters for \"%s\".\n", name);
    return (NULL);
}

/* Return a parameter of the form "xlabel foo" */

static char *
getword(wl, name)
    char *name;
    wordlist *wl;
{
    wordlist *beg;
    char *s;

    for (beg = wl; beg; beg = beg->wl_next) {
        if (eq(beg->wl_word, name)) {
            if ((beg == wl) || !beg->wl_next) {
                fprintf(cp_err,
			"Syntax error: looking for plot keyword at \"%s\".\n",
			name);
                return (NULL);
            }
            s = copy(beg->wl_next->wl_word);
            beg->wl_prev->wl_next = beg->wl_next->wl_next;
            if (beg->wl_next->wl_next)
                beg->wl_next->wl_next->wl_prev = beg->wl_prev;
            beg->wl_next->wl_next = NULL;
            wl_free(beg);
            return (s);
        }
    }
    return (NULL);
}

/* Check for and remove a one-word keyword. */

static bool
getflag(wl, name)
    wordlist *wl;
    char *name;
{
    while (wl) {
        if (eq(wl->wl_word, name)) {
            if (wl->wl_prev)
                wl->wl_prev->wl_next = wl->wl_next;
            if (wl->wl_next)
                wl->wl_next->wl_prev = wl->wl_prev;
            return (true);
        }
        wl = wl->wl_next;
    }
    return (false);
}

/* Extend a data vector to length by replicating the
 * last element, or truncate it if it is too long.
 */

static void
xtend(v, length)
    struct dvec *v;
    int length;
{
    int i;
    complex c, *oc;
    double d, *od;

    if (v->v_length == length)
        return;
    if (v->v_length > length) {
        v->v_length = length;
        return;
    }
    if (isreal(v)) {
        od = v->v_realdata;
        v->v_realdata = (double *) tmalloc(length * sizeof (double));
        for (i = 0; i < v->v_length; i++)
            v->v_realdata[i] = od[i];
        d = od[--i];
        while (i < length)
            v->v_realdata[i++] = d;
        tfree(od);
    } else {
        oc = v->v_compdata;
        v->v_compdata = (complex *) tmalloc(length * sizeof (complex));
        for (i = 0; i < v->v_length; i++) {
            realpart(&v->v_compdata[i]) = realpart(&oc[i]);
            imagpart(&v->v_compdata[i]) = imagpart(&oc[i]);
        }
        realpart(&c) = realpart(&oc[--i]);
        imagpart(&c) = imagpart(&oc[i]);
        while (i < length) {
            realpart(&v->v_compdata[i]) = realpart(&c);
            imagpart(&v->v_compdata[i++]) = imagpart(&c);
        tfree(oc);
        }
    }
    v->v_length = length;
    return;
}

/* Collapse every *xcomp elements into one, and use only the elements
 * between xind[0] and xind[1].
 */

static void
compress(d, xcomp, xind)
    struct dvec *d;
    double *xcomp, *xind;
{
    int cfac, ihi, ilo, newlen, i;
    int sz = isreal(d) ? sizeof (double) : sizeof (complex);
    double *dd;
    complex *cc;

    if (xind) {
        ilo = (int) xind[0];
        ihi = (int) xind[1];
        if ((ilo <= ihi) && (ilo > 0) && (ilo < d->v_length) &&
                (ihi > 1) && (ihi <= d->v_length)) {
            newlen = ihi - ilo;
            dd = (double *) tmalloc(newlen * sz);
            cc = (complex *) dd;
            if (isreal(d)) {
                bcopy((char *) (d->v_realdata + ilo),
                        (char *) dd, newlen * sz);
                tfree(d->v_realdata);
                d->v_realdata = dd;
            } else {
                bcopy((char *) (d->v_compdata + ilo),
                        (char *) cc, newlen * sz);
                tfree(d->v_compdata);
                d->v_compdata = cc;
            }
            d->v_length = newlen;
        }
    }

    if (xcomp) {
        cfac = (int) *xcomp;
        if ((cfac > 1) && (cfac < d->v_length)) {
            for (i = 0; i * cfac < d->v_length; i++)
                if (isreal(d))
                    d->v_realdata[i] = 
                            d->v_realdata[i * cfac];
                else
                    d->v_compdata[i] = 
                            d->v_compdata[i * cfac];
            d->v_length = i;
        }
    }
    return;
}