plotit.c

ngspice又一个电子CAD仿真软件代码.功能更全

                ptype = PLOT_POINT;
            else {
                fprintf(cp_err,
                    "Warning: strange plot type %s\n",
                    buf);
                ptype = PLOT_LIN;
            }
            pfound = TRUE;
        } else
            ptype = PLOT_LIN;
    }

    if (!sameflag || !xlabel)
        xlabel = getword(wl, "xlabel");
    else
        (void) getword(wl, "xlabel");
    if (!sameflag || !ylabel)
        ylabel = getword(wl, "ylabel");
    else
        (void) getword(wl, "ylabel");
    if (!sameflag || !title)
        title = getword(wl, "title");
    else
        (void) getword(wl, "title");

    if (!sameflag)
        nointerp = getflag(wl, "nointerp");
    else if (getflag(wl, "nointerp"))
        nointerp = TRUE;

    wl = wl->wl_next;
    if(tw) tfree(tw);
    if (!wl) {
        fprintf(cp_err, "Error: no vectors given\n");
        goto quit1;
    }

    wl->wl_prev = NULL;

    /* Now parse the vectors.  We have a list of the form
     * "a b vs c d e vs f g h".  Since it's a bit of a hassle for
     * us to parse the vector boundaries here, we do this -- call
     * ft_getpnames() without the check flag, and then look for 0-length
     * vectors with the name "vs"...  This is a sort of a gross hack,
     * since we have to check for 0-length vectors ourselves after
     * evaulating the pnodes...
     */

    names = ft_getpnames(wl, FALSE);
    if (names == NULL)
        goto quit1;

    /* Now evaluate the names. */
    for (n = names, lv = NULL; n; n = n->pn_next) {
        if (n->pn_value && (n->pn_value->v_length == 0) &&
                eq(n->pn_value->v_name, "vs")) {
            if (!lv) {
                fprintf(cp_err, "Error: misplaced vs arg\n");
                goto quit;
            } else {
                if (!(n = n->pn_next)) {
                    fprintf(cp_err,
                        "Error: missing vs arg\n");
                    goto quit;
                }
                dv = ft_evaluate(n);
                if (!dv)
                    goto quit;
                if (lastvs)
                    lv = lastvs->v_link2;
                else
                    lv = vecs;
                while (lv) {
                    lv->v_scale = dv;
                    lastvs = lv;
                    lv = lv->v_link2;
                }
            }
            continue;
        }
        dv = ft_evaluate(n);
        if (!dv)
            goto quit;
        if (!d)
            vecs = dv;
        else
            d->v_link2 = dv;
        for (d = dv; d->v_link2; d = d->v_link2)
            ;
        lv = dv;
    }
/*    free_pnode(names); pn:really should be commented out ? */ 
    d->v_link2 = NULL;

    /* Now check for 0-length vectors. */
    for (d = vecs; d; d = d->v_link2)
        if (!d->v_length) {
            fprintf(cp_err, "Error: %s: no such vector\n",
                    d->v_name);
            goto quit;
        }
    
    /* If there are higher dimensional vectors, transform them into a
     * family of vectors.
     */
    for (d = vecs, lv = NULL; d; d = d->v_link2) {
        if (d->v_numdims > 1) {
	    if (lv)
		lv->v_link2 = vec_mkfamily(d);
	    else
		vecs = lv = vec_mkfamily(d);
            while (lv->v_link2)
                lv = lv->v_link2;
            lv->v_link2 = d->v_link2;
            d = lv;
        } else {
            lv = d;
	}
    }

    /* Now fill in the scales for vectors who aren't already fixed up. */
    for (d = vecs; d; d = d->v_link2)
        if (!d->v_scale) {
            if (d->v_plot->pl_scale)
                d->v_scale = d->v_plot->pl_scale;
            else
                d->v_scale = d;
        }

	/* The following line displays the unit at the time of 
	 temp-sweep and res-sweep. This may not be a so good solution. by H.T */
	if(!strcmp(vecs->v_scale->v_name,"temp-sweep")) vecs->v_scale->v_type=14;
	if(!strcmp(vecs->v_scale->v_name,"res-sweep")) vecs->v_scale->v_type=15;

    /* See if the log flag is set anywhere... */
    if (!gfound) {
        for (d = vecs; d; d = d->v_link2)
            if (d->v_scale && (d->v_scale->v_gridtype == GRID_XLOG))
                gtype = GRID_XLOG;
        for (d = vecs; d; d = d->v_link2)
            if (d->v_gridtype == GRID_YLOG) {
                if ((gtype == GRID_XLOG) ||
                        (gtype == GRID_LOGLOG))
                    gtype = GRID_LOGLOG;
                else
                    gtype = GRID_YLOG;
            }
        for (d = vecs; d; d = d->v_link2)
            if (d->v_gridtype == GRID_SMITH || d->v_gridtype == GRID_SMITHGRID
		|| d->v_gridtype == GRID_POLAR)
	    {
                gtype = d->v_gridtype;
                break;
            }
    }

    /* See if there are any default plot types...  Here, like above, we
     * don't do entirely the best thing when there is a mixed set of
     * default plot types...
     */
    if (!sameflag && !pfound) {
        ptype = PLOT_LIN;
        for (d = vecs; d; d = d->v_link2)
            if (d->v_plottype != PLOT_LIN) {
                ptype = d->v_plottype;
                break;
            }
    }

    /* Check and see if this is pole zero stuff. */
    if ((vecs->v_type == SV_POLE) || (vecs->v_type == SV_ZERO))
        oneval = TRUE;
    
    for (d = vecs; d; d = d->v_link2)
        if (((d->v_type == SV_POLE) || (d->v_type == SV_ZERO)) !=
                oneval ? 1 : 0) {
            fprintf(cp_err,
"Error: plot must be either all pole-zero or contain no poles or zeros\n");
            goto quit;
        }
    
    if ((gtype == GRID_POLAR) || (gtype == GRID_SMITH
	|| gtype == GRID_SMITHGRID))
    {
        oneval = TRUE;
    }

    /* If we are plotting scalars, make sure there is enough
     * data to fit on the screen.
     */
    
    for (d = vecs; d; d = d->v_link2)
        if (d->v_length == 1)
            xtend(d, d->v_scale->v_length);

    /* Now patch up each vector with the compression and thestrchr
     * selection.
     */
    if (xcompress || xindices) {
        for (d = vecs; d; d = d->v_link2) {
            compress(d, xcompress, xindices);
            d->v_scale = vec_copy(d->v_scale);
            compress(d->v_scale, xcompress, xindices);
        }
    }
    
    /* Transform for smith plots */
    if (gtype == GRID_SMITH) {
	double	re, im, rex, imx;
	double	r, i, x;
	struct dvec **prevvp, *n;
	int	j;

	prevvp = &vecs;
	for (d = vecs; d; d = d->v_link2) {
	    if (d->v_flags & VF_PERMANENT) {
		n = vec_copy(d);
		n->v_flags &= ~VF_PERMANENT;
		n->v_link2 = d->v_link2;
		d = n;
		*prevvp = d;
	    }
	    prevvp = &d->v_link2;

	    if (isreal(d)) {
		fprintf(cp_err,
		    "Warning: plotting real data \"%s\" on a smith grid\n",
		    d->v_name);

		for (j = 0; j < d->v_length; j++) {
		    r = d->v_realdata[j];
		    d->v_realdata[j] = (r - 1) / (r + 1);
		}
	    } else {
		for (j = 0; j < d->v_length; j++) {
		    /* (re - 1, im) / (re + 1, im) */

		    re = realpart(d->v_compdata + j);
		    im = imagpart(d->v_compdata + j);

		    rex = re + 1;
		    imx = im;
		    re = re - 1;

		    /* (re, im) / (rex, imx) */
		    x = 1 - (imx / rex) * (imx / rex);
		    r = re / rex + im / rex * imx / rex;
		    i = im / rex - re / rex * imx / rex;

		    realpart(d->v_compdata + j) = r / x;
		    imagpart(d->v_compdata + j) = i / x;
		}
	    }
	}
    }

    /* Figure out the proper x- and y-axis limits. */
    if (ylim) {
	    ylims[0] = ylim[0];
	    ylims[1] = ylim[1];
    } else if (oneval) {
        ylims[0] = HUGE;
        ylims[1] = - ylims[0];
        for (d = vecs; d; d = d->v_link2) {
		dd = ft_minmax(d, TRUE);
            if (dd[0] < ylims[0])
                ylims[0] = dd[0];
            if (dd[1] > ylims[1])
                ylims[1] = dd[1];
        }
    } else {
        ylims[0] = HUGE;
        ylims[1] = - ylims[0];
        for (d = vecs; d; d = d->v_link2) {
            dd = ft_minmax(d, TRUE);
            if (dd[0] < ylims[0])
                ylims[0] = dd[0];
            if (dd[1] > ylims[1])
                ylims[1] = dd[1];
        }

	/* XXX */
	for (d = vecs; d; d = d->v_link2) {
	    if (d->v_flags & VF_MINGIVEN)
		if (ylims[0] < d->v_minsignal)
		    ylims[0] = d->v_minsignal;
	    if (d->v_flags & VF_MAXGIVEN)
		if (ylims[1] > d->v_maxsignal)
		    ylims[1] = d->v_maxsignal;
	}
    }

    if (xlim) {
	    xlims[0] = xlim[0];
	    xlims[1] = xlim[1];
    } else if (oneval) {
        xlims[0] = HUGE;
        xlims[1] = - xlims[0];
        for (d = vecs; d; d = d->v_link2) {
		dd = ft_minmax(d, FALSE);

            if (dd[0] < xlims[0])
                xlims[0] = dd[0];
            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;
    }

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

    /* 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))
    {
        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);
            goto quit;
            }

            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);
        rtn = TRUE;
	goto quit;
    }

    /* 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);
	rtn = TRUE;
	goto quit;
    }
    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))
        goto quit;

    /* 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();

    rtn = TRUE;
quit:
    free_pnode(names);
quit1:
    return rtn;
}