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plot2d.c
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1542 lines (1341 loc) · 46 KB
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#ifndef lint
static char *RCSid() { return RCSid("$Id: plot2d.c,v 1.35.2.1 2001/03/03 21:40:18 joze Exp $"); }
#endif
/* GNUPLOT - plot2d.c */
/*[
* Copyright 1986 - 1993, 1998 Thomas Williams, Colin Kelley
*
* Permission to use, copy, and distribute this software and its
* documentation for any purpose with or without fee is hereby granted,
* provided that the above copyright notice appear in all copies and
* that both that copyright notice and this permission notice appear
* in supporting documentation.
*
* Permission to modify the software is granted, but not the right to
* distribute the complete modified source code. Modifications are to
* be distributed as patches to the released version. Permission to
* distribute binaries produced by compiling modified sources is granted,
* provided you
* 1. distribute the corresponding source modifications from the
* released version in the form of a patch file along with the binaries,
* 2. add special version identification to distinguish your version
* in addition to the base release version number,
* 3. provide your name and address as the primary contact for the
* support of your modified version, and
* 4. retain our contact information in regard to use of the base
* software.
* Permission to distribute the released version of the source code along
* with corresponding source modifications in the form of a patch file is
* granted with same provisions 2 through 4 for binary distributions.
*
* This software is provided "as is" without express or implied warranty
* to the extent permitted by applicable law.
]*/
#include "plot2d.h"
#include "gp_types.h"
#include "alloc.h"
#include "axis.h"
#include "binary.h"
#include "command.h"
#include "datafile.h"
#include "graphics.h"
#include "fit.h"
#include "interpol.h"
#include "internal.h"
#include "misc.h"
#include "parse.h"
/* #include "setshow.h" */
#include "tables.h"
#include "term_api.h"
#include "util.h"
#ifndef _Windows
# include "help.h"
#endif
/* minimum size of points[] in curve_points */
#define MIN_CRV_POINTS 100
/* static prototypes */
static struct curve_points * cp_alloc __PROTO((int num));
static int get_data __PROTO((struct curve_points *));
static void store2d_point __PROTO((struct curve_points *, int i, double x, double y, double xlow, double xhigh, double ylow, double yhigh, double width));
static void print_table __PROTO((struct curve_points * first_plot, int plot_num));
static void eval_plots __PROTO((void));
static void parametric_fixup __PROTO((struct curve_points * start_plot, int *plot_num));
/* internal and external variables */
/* the curves/surfaces of the plot */
struct curve_points *first_plot = NULL;
static struct udft_entry plot_func;
double boxwidth = -1.0; /* box width (automatic) */
/* function implementations */
/* HBB 20000508: moved cp_alloc() &friends to the main module using them, and
* made cp_alloc 'static'.
*/
/*
* cp_alloc() allocates a curve_points structure that can hold 'num'
* points.
*/
static struct curve_points *
cp_alloc(num)
int num;
{
struct curve_points *cp;
cp = (struct curve_points *) gp_alloc(sizeof(struct curve_points), "curve");
cp->p_max = (num >= 0 ? num : 0);
if (num > 0) {
cp->points = (struct coordinate GPHUGE *)
gp_alloc(num * sizeof(struct coordinate), "curve points");
} else
cp->points = (struct coordinate GPHUGE *) NULL;
cp->next = NULL;
cp->title = NULL;
return (cp);
}
/*
* cp_extend() reallocates a curve_points structure to hold "num"
* points. This will either expand or shrink the storage.
*/
void
cp_extend(cp, num)
struct curve_points *cp;
int num;
{
#if defined(DOS16) || defined(WIN16)
/* Make sure we do not allocate more than 64k points in msdos since
* indexing is done with 16-bit int
* Leave some bytes for malloc maintainance.
*/
if (num > 32700)
int_error(NO_CARET, "Array index must be less than 32k in msdos");
#endif /* MSDOS */
if (num == cp->p_max)
return;
if (num > 0) {
if (cp->points == NULL) {
cp->points = (struct coordinate GPHUGE *)
gp_alloc(num * sizeof(struct coordinate), "curve points");
} else {
cp->points = (struct coordinate GPHUGE *)
gp_realloc(cp->points, num * sizeof(struct coordinate), "expanding curve points");
}
cp->p_max = num;
} else {
if (cp->points != (struct coordinate GPHUGE *) NULL)
free(cp->points);
cp->points = (struct coordinate GPHUGE *) NULL;
cp->p_max = 0;
}
}
/*
* cp_free() releases any memory which was previously malloc()'d to hold
* curve points (and recursively down the linked list).
*/
/* HBB 20000506: instead of risking stack havoc by recursion, operate
* iteratively */
void
cp_free(cp)
struct curve_points *cp;
{
while (cp) {
struct curve_points *next = cp->next;
if (cp->title)
free(cp->title);
if (cp->points)
free(cp->points);
free((char *) cp);
cp = next;
}
}
/* use this instead empty macro arguments to work around NeXT cpp bug */
/* if this fails on any system, we might use ((void)0) */
#define NOOP /* */
/*
* In the parametric case we can say plot [a= -4:4] [-2:2] [-1:1] sin(a),a**2
* while in the non-parametric case we would say only plot [b= -2:2] [-1:1]
* sin(b)
*/
void
plotrequest()
{
int dummy_token = -1;
int t_axis;
if (!term) /* unknown */
int_error(c_token, "use 'set term' to set terminal type first");
is_3d_plot = FALSE;
if (parametric && strcmp(set_dummy_var[0], "u") == 0)
strcpy(set_dummy_var[0], "t");
/* initialise the arrays from the 'set' scalars */
AXIS_INIT2D(FIRST_X_AXIS, 0);
AXIS_INIT2D(FIRST_Y_AXIS, 1);
AXIS_INIT2D(SECOND_X_AXIS, 0);
AXIS_INIT2D(SECOND_Y_AXIS, 1);
AXIS_INIT2D(T_AXIS, 0);
AXIS_INIT2D(R_AXIS, 1);
t_axis = (parametric || polar) ? T_AXIS : FIRST_X_AXIS;
PARSE_NAMED_RANGE(t_axis, dummy_token);
if (parametric || polar) /* set optional x ranges */
PARSE_RANGE(FIRST_X_AXIS);
/* possible reversal of x range *does* matter, even in parametric
* or polar mode */
CHECK_REVERSE(FIRST_X_AXIS);
PARSE_RANGE(FIRST_Y_AXIS);
CHECK_REVERSE(FIRST_Y_AXIS);
PARSE_RANGE(SECOND_X_AXIS);
CHECK_REVERSE(SECOND_X_AXIS);
PARSE_RANGE(SECOND_Y_AXIS);
CHECK_REVERSE(SECOND_Y_AXIS);
/* use the default dummy variable unless changed */
if (dummy_token >= 0)
copy_str(c_dummy_var[0], dummy_token, MAX_ID_LEN);
else
(void) strcpy(c_dummy_var[0], set_dummy_var[0]);
eval_plots();
}
/* Use up to 7 columns in data file at once -- originally it was 5 */
#define NCOL 7
/* A quick note about boxes style. For boxwidth auto, we cannot
* calculate widths yet, since it may be sorted, etc. But if
* width is set, we must do it now, before logs of xmin/xmax
* are taken.
* We store -1 in point->z as a marker to mean width needs to be
* calculated, or 0 to mean that xmin/xmax are set correctly
*/
/* current_plot->token is after datafile spec, for error reporting
* it will later be moved passed title/with/linetype/pointtype
*/
static int
get_data(current_plot)
struct curve_points *current_plot;
{
int i /* num. points ! */ , j;
int max_cols, min_cols; /* allowed range of column numbers */
double v[NCOL];
int storetoken = current_plot->token;
/* eval_plots has already opened file */
/* HBB 2000504: For most plot styles, the 'z' coordinate is
* unused. set it to -1, to account for that. For styles that use
* the z coordinate as a real coordinate (i.e. not a width or
* 'delta' component, change the setting inside the switch: */
current_plot->z_axis = -1;
switch (current_plot->plot_style) { /* set maximum columns to scan */
case XYERRORLINES:
case XYERRORBARS:
case BOXXYERROR:
min_cols = 4;
max_cols = 7;
break;
case FINANCEBARS:
case CANDLESTICKS:
/* HBB 20000504: use 'z' coordinate for y-axis quantity */
current_plot->z_axis = current_plot->y_axis;
min_cols = max_cols = 5;
break;
case BOXERROR:
min_cols = 4;
max_cols = 5;
break;
case VECTOR:
min_cols = max_cols = 4;
break;
case XERRORLINES:
case YERRORLINES:
case XERRORBARS:
case YERRORBARS:
min_cols = 3;
max_cols = 4;
break;
case BOXES:
min_cols = 2;
max_cols = 4;
/* HBB 20010214: commented out. z_axis is abused to store a
* flag here, not for the actual width, as I thought it
* was. Setting it to x_axis would cause the x axis to be
* auto-extended to contain -1 or 0 because of those magical
* values */
/* current_plot->z_axis = current_plot->x_axis; */
break;
default:
min_cols = 1;
max_cols = 2;
break;
}
if (current_plot->plot_smooth == SMOOTH_ACSPLINES) {
max_cols = 3;
current_plot->z_axis = FIRST_Z_AXIS;
df_axis[2] = FIRST_Z_AXIS;
}
if (df_no_use_specs > max_cols)
int_error(NO_CARET, "Too many using specs for this style");
if (df_no_use_specs > 0 && df_no_use_specs < min_cols)
int_error(NO_CARET, "Not enough columns for this style");
i = 0;
while ((j = df_readline(v, max_cols)) != DF_EOF) {
/* j <= max_cols */
if (i >= current_plot->p_max) {
/*
* overflow about to occur. Extend size of points[] array. We
* either double the size, or add 1000 points, whichever is a
* smaller increment. Note i = p_max.
*/
cp_extend(current_plot, i + (i < 1000 ? i : 1000));
}
/* Limitation: No xerrorbars with boxes */
switch (j) {
default:
{
df_close();
int_error(c_token, "internal error : df_readline returned %d : datafile line %d", j, df_line_number);
}
case DF_UNDEFINED:
/* bad result from extended using expression */
current_plot->points[i].type = UNDEFINED;
i++;
continue;
case DF_FIRST_BLANK:
/* break in data, make next point undefined */
current_plot->points[i].type = UNDEFINED;
i++;
continue;
case DF_SECOND_BLANK:
/* second blank line. We dont do anything
* (we did everything when we got FIRST one)
*/
continue;
case 0: /* not blank line, but df_readline couldn't parse it */
{
df_close();
int_error(current_plot->token,
"Bad data on line %d", df_line_number);
}
case 1:
{ /* only one number */
/* x is index, assign number to y */
v[1] = v[0];
v[0] = df_datum;
/* nobreak */
}
case 2:
/* x, y */
/* ylow and yhigh are same as y */
if (current_plot->plot_style == BOXES && boxwidth > 0) {
/* calc width now */
store2d_point(current_plot, i++, v[0], v[1],
v[0] - boxwidth / 2, v[0] + boxwidth / 2,
v[1], v[1], 0.0);
} else {
/* xlow and xhigh are same as x */
/* auto width if boxes, else ignored */
store2d_point(current_plot, i++, v[0], v[1], v[0], v[0], v[1],
v[1], -1.0);
}
break;
case 3:
/* x, y, ydelta OR x, y, xdelta OR x, y, width */
if (current_plot->plot_smooth == SMOOTH_ACSPLINES)
store2d_point(current_plot, i++, v[0], v[1], v[0], v[0], v[1],
v[1], v[2]);
else
switch (current_plot->plot_style) {
default:
int_warn(storetoken, "This plot style not work with 3 cols. Setting to yerrorbars");
current_plot->plot_style = YERRORBARS;
/* fall through */
case YERRORLINES:
case YERRORBARS:
case BOXERROR: /* x, y, dy */
/* auto width if boxes, else ignored */
store2d_point(current_plot, i++, v[0], v[1], v[0], v[0],
v[1] - v[2], v[1] + v[2], -1.0);
break;
case XERRORLINES:
case XERRORBARS:
store2d_point(current_plot, i++, v[0], v[1], v[0] - v[2],
v[0] + v[2], v[1], v[1], 0.0);
break;
case BOXES:
/* calculate xmin and xmax here, so that logs are
* taken if if necessary */
store2d_point(current_plot, i++, v[0], v[1],
v[0] - v[2] / 2, v[0] + v[2] / 2,
v[1], v[1], 0.0);
break;
} /*inner switch */
break;
case 4:
/* x, y, ylow, yhigh OR
* x, y, xlow, xhigh OR
* x, y, xdelta, ydelta OR
* x, y, ydelta, width
*/
switch (current_plot->plot_style) {
default:
int_warn(storetoken, "This plot style does not work with 4 cols. Setting to yerrorbars");
current_plot->plot_style = YERRORBARS;
/* fall through */
case YERRORLINES:
case YERRORBARS:
store2d_point(current_plot, i++, v[0], v[1], v[0], v[0], v[2],
v[3], -1.0);
break;
case BOXXYERROR: /* x, y, dx, dy */
case XYERRORLINES:
case XYERRORBARS:
store2d_point(current_plot, i++, v[0], v[1], v[0] - v[2],
v[0] + v[2], v[1] - v[3], v[1] + v[3], 0.0);
break;
case BOXES: /* x, y, xmin, xmax */
store2d_point(current_plot, i++, v[0], v[1], v[2], v[3], v[1],
v[1], 0.0);
break;
case XERRORLINES:
case XERRORBARS:
store2d_point(current_plot, i++, v[0], v[1], v[2], v[3], v[1],
v[1], 0.0);
break;
case BOXERROR:
/* x,y, xleft, xright */
store2d_point(current_plot, i++, v[0], v[1], v[0], v[0],
v[1] - v[2], v[1] + v[2], 0.0);
break;
case VECTOR:
/* x,y,dx,dy */
store2d_point(current_plot, i++, v[0], v[1], v[0], v[0] + v[2],
v[1], v[1] + v[3], -1.0);
break;
} /*inner switch */
break;
case 5:
{ /* x, y, ylow, yhigh, width or x open low high close */
switch (current_plot->plot_style) {
default:
int_warn(storetoken, "Five col. plot style must be boxerrorbars, financebars or candlesticks. Setting to boxerrorbars");
current_plot->plot_style = BOXERROR;
/*fall through */
case BOXERROR: /* x, y, ylow, yhigh, width */
store2d_point(current_plot, i++, v[0], v[1], v[0] - v[4] / 2,
v[0] + v[4] / 2, v[2], v[3], 0.0);
break;
case FINANCEBARS: /* x yopen ylow yhigh yclose */
case CANDLESTICKS:
store2d_point(current_plot, i++, v[0], v[1], v[0], v[0],
v[2], v[3], v[4]);
break;
}
break;
}
case 7:
/* same as six columns. Width ignored */
/* eh ? - fall through */
case 6:
/* x, y, xlow, xhigh, ylow, yhigh */
switch (current_plot->plot_style) {
default:
int_warn(storetoken, "This plot style not work with 6 cols. Setting to xyerrorbars");
current_plot->plot_style = XYERRORBARS;
/*fall through */
case XYERRORLINES:
case XYERRORBARS:
case BOXXYERROR:
store2d_point(current_plot, i++, v[0], v[1], v[2], v[3], v[4],
v[5], 0.0);
break;
}
} /*switch */
} /*while */
current_plot->p_count = i;
cp_extend(current_plot, i); /* shrink to fit */
df_close();
return i; /* i==0 indicates an 'empty' file */
}
/* called by get_data for each point */
static void
store2d_point(current_plot, i, x, y, xlow, xhigh, ylow, yhigh, width)
struct curve_points *current_plot;
int i; /* point number */
double x, y;
double ylow, yhigh;
double xlow, xhigh;
double width; /* BOXES widths: -1 -> autocalc, 0 -> use xlow/xhigh */
{
struct coordinate GPHUGE *cp = &(current_plot->points[i]);
int dummy_type = INRANGE; /* sometimes we dont care about outranging */
/* jev -- pass data values thru user-defined function */
/* div -- y is dummy variable 2 - copy value there */
if (ydata_func.at) {
struct value val;
(void) Gcomplex(&ydata_func.dummy_values[0], y, 0.0);
ydata_func.dummy_values[2] = ydata_func.dummy_values[0];
evaluate_at(ydata_func.at, &val);
y = undefined ? 0.0 : real(&val);
(void) Gcomplex(&ydata_func.dummy_values[0], ylow, 0.0);
ydata_func.dummy_values[2] = ydata_func.dummy_values[0];
evaluate_at(ydata_func.at, &val);
ylow = undefined ? 0 : real(&val);
(void) Gcomplex(&ydata_func.dummy_values[0], yhigh, 0.0);
ydata_func.dummy_values[2] = ydata_func.dummy_values[0];
evaluate_at(ydata_func.at, &val);
yhigh = undefined ? 0 : real(&val);
}
dummy_type = cp->type = INRANGE;
if (polar) {
double newx, newy;
if (!(axis_array[R_AXIS].autoscale & 2) && y > axis_array[R_AXIS].max) {
cp->type = OUTRANGE;
}
if (!(axis_array[R_AXIS].autoscale & 1)) {
/* we store internally as if plotting r(t)-rmin */
y -= axis_array[R_AXIS].min;
}
newx = y * cos(x * ang2rad);
newy = y * sin(x * ang2rad);
#if 0 /* HBB 981118: added polar errorbars */
/* only lines and points supported with polar */
y = ylow = yhigh = newy;
x = xlow = xhigh = newx;
#else
y = newy;
x = newx;
if (!(axis_array[R_AXIS].autoscale & 2) && yhigh > axis_array[R_AXIS].max) {
cp->type = OUTRANGE;
}
if (!(axis_array[R_AXIS].autoscale & 1)) {
/* we store internally as if plotting r(t)-rmin */
yhigh -= axis_array[R_AXIS].min;
}
newx = yhigh * cos(xhigh * ang2rad);
newy = yhigh * sin(xhigh * ang2rad);
yhigh = newy;
xhigh = newx;
if (!(axis_array[R_AXIS].autoscale & 2) && ylow > axis_array[R_AXIS].max) {
cp->type = OUTRANGE;
}
if (!(axis_array[R_AXIS].autoscale & 1)) {
/* we store internally as if plotting r(t)-rmin */
ylow -= axis_array[R_AXIS].min;
}
newx = ylow * cos(xlow * ang2rad);
newy = ylow * sin(xlow * ang2rad);
ylow = newy;
xlow = newx;
#endif
}
/* return immediately if x or y are undefined
* we dont care if outrange for high/low.
* BUT if high/low undefined (ie log( < 0 ), no number is stored,
* but graphics.c doesn't know.
* explicitly store -VERYLARGE;
*/
STORE_WITH_LOG_AND_UPDATE_RANGE(cp->x, x, cp->type, current_plot->x_axis, NOOP, return);
STORE_WITH_LOG_AND_UPDATE_RANGE(cp->xlow, xlow, dummy_type, current_plot->x_axis, NOOP, cp->xlow = -VERYLARGE);
STORE_WITH_LOG_AND_UPDATE_RANGE(cp->xhigh, xhigh, dummy_type, current_plot->x_axis, NOOP, cp->xhigh = -VERYLARGE);
STORE_WITH_LOG_AND_UPDATE_RANGE(cp->y, y, cp->type, current_plot->y_axis, NOOP, return);
STORE_WITH_LOG_AND_UPDATE_RANGE(cp->ylow, ylow, dummy_type, current_plot->y_axis, NOOP, cp->ylow = -VERYLARGE);
STORE_WITH_LOG_AND_UPDATE_RANGE(cp->yhigh, yhigh, dummy_type, current_plot->y_axis, NOOP, cp->yhigh = -VERYLARGE);
/* HBB 20010214: if z is not used for some actual value, just
* store 'width' to that axis and be done with it */
if ((int)current_plot->z_axis != -1)
STORE_WITH_LOG_AND_UPDATE_RANGE(cp->z, width, dummy_type, current_plot->z_axis, NOOP, cp->z = -VERYLARGE);
else
cp->z = width;
} /* store2d_point */
/*
* print_points: a debugging routine to print out the points of a curve, and
* the curve structure. If curve<0, then we print the list of curves.
*/
#if 0 /* not used */
static char *plot_type_names[4] =
{
"Function", "Data", "3D Function", "3d data"
};
static char *plot_style_names[14] =
{
"Lines", "Points", "Impulses", "LinesPoints", "Dots", "XErrorbars",
"YErrorbars", "XYErrorbars", "BoxXYError", "Boxes", "Boxerror", "Steps",
"FSteps", "Vector",
"XErrorlines", "YErrorlines", "XYErrorlines"
};
static char *plot_smooth_names[5] =
{
"None", "Unique", "CSplines", "ACSplines", "Bezier", "SBezier"
};
static void
print_points(curve)
int curve; /* which curve to print */
{
register struct curve_points *this_plot;
int i;
if (curve < 0) {
for (this_plot = first_plot, i = 0;
this_plot != NULL;
i++, this_plot = this_plot->next) {
printf("Curve %d:\n", i);
if ((int) this_plot->plot_type >= 0 && (int) (this_plot->plot_type) < 4)
printf("Plot type %d: %s\n", (int) (this_plot->plot_type),
plot_type_names[(int) (this_plot->plot_type)]);
else
printf("Plot type %d: BAD\n", (int) (this_plot->plot_type));
if ((int) this_plot->plot_style >= 0 && (int) (this_plot->plot_style) < 14)
printf("Plot style %d: %s\n", (int) (this_plot->plot_style),
plot_style_names[(int) (this_plot->plot_style)]);
else
printf("Plot style %d: BAD\n", (int) (this_plot->plot_style));
if ((int) this_plot->plot_smooth >= 0 && (int) (this_plot->plot_smooth) < 6)
printf("Plot smooth style %d: %s\n", (int) (this_plot->plot_style),
plot_smooth_names[(int) (this_plot->plot_smooth)]);
else
printf("Plot smooth style %d: BAD\n", (int) (this_plot->plot_smooth));
printf("\
Plot title: '%s'\n\
Line type %d\n\
Point type %d\n\
max points %d\n\
current points %d\n\n",
this_plot->title,
this_plot->line_type,
this_plot->point_type,
this_plot->p_max,
this_plot->p_count);
}
} else {
for (this_plot = first_plot, i = 0;
i < curve && this_plot != NULL;
i++, this_plot = this_plot->next);
if (this_plot == NULL)
printf("Curve %d does not exist; list has %d curves\n", curve, i);
else {
printf("Curve %d, %d points\n", curve, this_plot->p_count);
for (i = 0; i < this_plot->p_count; i++) {
printf("%c x=%g y=%g z=%g xlow=%g xhigh=%g ylow=%g yhigh=%g\n",
this_plot->points[i].type == INRANGE ? 'i'
: this_plot->points[i].type == OUTRANGE ? 'o'
: 'u',
this_plot->points[i].x,
this_plot->points[i].y,
this_plot->points[i].z,
this_plot->points[i].xlow,
this_plot->points[i].xhigh,
this_plot->points[i].ylow,
this_plot->points[i].yhigh);
}
printf("\n");
}
}
}
#endif /* not used */
static void
print_table(current_plot, plot_num)
struct curve_points *current_plot;
int plot_num;
{
int i, curve;
char *table_format = NULL;
/* The data format is determined by the format of the axis labels.
* See 'set format'. Patch by Don Taber
*/
table_format = gp_alloc(strlen(axis_array[FIRST_X_AXIS].formatstring)
+ strlen(axis_array[FIRST_Y_AXIS].formatstring)
+ 5, "table format");
strcpy(table_format, axis_array[FIRST_X_AXIS].formatstring);
strcat(table_format, " ");
strcat(table_format, axis_array[FIRST_Y_AXIS].formatstring);
strcat(table_format, " %c\n");
for (curve = 0; curve < plot_num;
curve++, current_plot = current_plot->next) {
fprintf(gpoutfile, "#Curve %d, %d points\n#x y",
curve, current_plot->p_count);
switch (current_plot->plot_style) {
case BOXES:
case XERRORBARS:
fprintf(gpoutfile, " xlow xhigh");
break;
case BOXERROR:
case YERRORBARS:
fprintf(gpoutfile, " ylow yhigh");
break;
case BOXXYERROR:
case XYERRORBARS:
fprintf(gpoutfile, " xlow xhigh ylow yhigh");
break;
case FINANCEBARS:
case CANDLESTICKS:
default:
/* ? */
break;
}
fprintf(gpoutfile, " type\n");
for (i = 0; i < current_plot->p_count; i++) {
fprintf(gpoutfile, "%g %g",
current_plot->points[i].x,
current_plot->points[i].y);
switch (current_plot->plot_style) {
case BOXES:
case XERRORBARS:
fprintf(gpoutfile, " %g %g",
current_plot->points[i].xlow,
current_plot->points[i].xhigh);
break;
case BOXERROR:
case YERRORBARS:
fprintf(gpoutfile, " %g %g",
current_plot->points[i].ylow,
current_plot->points[i].yhigh);
break;
case BOXXYERROR:
case XYERRORBARS:
fprintf(gpoutfile, " %g %g %g %g",
current_plot->points[i].xlow,
current_plot->points[i].xhigh,
current_plot->points[i].ylow,
current_plot->points[i].yhigh);
break;
case FINANCEBARS:
case CANDLESTICKS:
default:
/* ? */
break;
}
fprintf(gpoutfile, " %c\n",
current_plot->points[i].type == INRANGE ? 'i'
: current_plot->points[i].type == OUTRANGE ? 'o'
: 'u');
}
fputc('\n', gpoutfile);
}
/* two blank lines between plots in table output */
fputc('\n', gpoutfile);
fflush(gpoutfile);
free(table_format);
}
/*
* This parses the plot command after any range specifications. To support
* autoscaling on the x axis, we want any data files to define the x range,
* then to plot any functions using that range. We thus parse the input
* twice, once to pick up the data files, and again to pick up the functions.
* Definitions are processed twice, but that won't hurt.
* div - okay, it doesn't hurt, but every time an option as added for
* datafiles, code to parse it has to be added here. Change so that
* we store starting-token in the plot structure.
*/
static void
eval_plots()
{
register int i;
register struct curve_points *this_plot, **tp_ptr;
int uses_axis[AXIS_ARRAY_SIZE];
int some_functions = 0;
int plot_num, line_num, point_num, xparam = 0;
char *xtitle = NULL;
int begin_token = c_token; /* so we can rewind for second pass */
uses_axis[FIRST_X_AXIS] =
uses_axis[FIRST_Y_AXIS] =
uses_axis[SECOND_X_AXIS] =
uses_axis[SECOND_Y_AXIS] = 0;
/* Reset first_plot. This is usually done at the end of this function.
* If there is an error within this function, the memory is left allocated,
* since we cannot call cp_free if the list is incomplete. Making sure that
* the list structure is always vaild requires some rewriting */
first_plot = NULL;
tp_ptr = &(first_plot);
plot_num = 0;
line_num = 0; /* default line type */
point_num = 0; /* default point type */
xtitle = NULL;
/* ** First Pass: Read through data files ***
* This pass serves to set the xrange and to parse the command, as well
* as filling in every thing except the function data. That is done after
* the xrange is defined.
*/
while (TRUE) {
if (END_OF_COMMAND)
int_error(c_token, "function to plot expected");
if (is_definition(c_token)) {
define();
} else {
/* int x_axis = 0, y_axis = 0; */ /* HBB 20000520: have global in axis.c now */
int specs = 0;
/* for datafile plot, record datafile spec for title */
int start_token = c_token, end_token;
plot_num++;
if (isstring(c_token)) { /* data file to plot */
if (parametric && xparam)
int_error(c_token, "previous parametric function not fully specified");
if (*tp_ptr)
this_plot = *tp_ptr;
else { /* no memory malloc()'d there yet */
this_plot = cp_alloc(MIN_CRV_POINTS);
*tp_ptr = this_plot;
}
this_plot->plot_type = DATA;
this_plot->plot_style = data_style;
this_plot->plot_smooth = SMOOTH_NONE;
specs = df_open(NCOL); /* up to NCOL cols */
/* this parses data-file-specific modifiers only */
/* we'll sort points when we know style, if necessary */
if (df_binary)
int_error(c_token, "2d binary files not yet supported");
/* include modifiers in default title */
this_plot->token = end_token = c_token - 1;
} else {
/* function to plot */
some_functions = 1;
if (parametric) /* working on x parametric function */
xparam = 1 - xparam;
if (*tp_ptr) {
this_plot = *tp_ptr;
cp_extend(this_plot, samples_1 + 1);
} else { /* no memory malloc()'d there yet */
this_plot = cp_alloc(samples_1 + 1);
*tp_ptr = this_plot;
}
this_plot->plot_type = FUNC;
this_plot->plot_style = func_style;
dummy_func = &plot_func;
plot_func.at = temp_at();
dummy_func = NULL;
/* ignore it for now */
end_token = c_token - 1;
} /* end of IS THIS A FILE OR A FUNC block */
/* axis defaults */
x_axis = FIRST_X_AXIS;
y_axis = FIRST_Y_AXIS;
/* deal with smooth */
if (almost_equals(c_token, "s$mooth")) {
c_token++;
switch(lookup_table(&plot_smooth_tbl[0],c_token)) {
case SMOOTH_ACSPLINES:
this_plot->plot_smooth = SMOOTH_ACSPLINES;
break;
case SMOOTH_BEZIER:
this_plot->plot_smooth = SMOOTH_BEZIER;
break;
case SMOOTH_CSPLINES:
this_plot->plot_smooth = SMOOTH_CSPLINES;
break;
case SMOOTH_SBEZIER:
this_plot->plot_smooth = SMOOTH_SBEZIER;
break;
case SMOOTH_UNIQUE:
this_plot->plot_smooth = SMOOTH_UNIQUE;
break;
case SMOOTH_NONE:
default:
int_error(c_token, "expecting 'unique', 'acsplines', 'csplines', 'bezier' or 'sbezier'");
break;
}
this_plot->plot_style = LINES;
c_token++; /* skip format */
}
/* look for axes/axis */
if (almost_equals(c_token, "ax$es") || almost_equals(c_token, "ax$is")) {
if (parametric && xparam)
int_error(c_token, "previous parametric function not fully specified");
c_token++;
switch(lookup_table(&plot_axes_tbl[0],c_token)) {
case AXES_X1Y1:
x_axis = FIRST_X_AXIS;
y_axis = FIRST_Y_AXIS;
++c_token;
break;
case AXES_X2Y2:
x_axis = SECOND_X_AXIS;
y_axis = SECOND_Y_AXIS;
++c_token;
break;
case AXES_X1Y2:
x_axis = FIRST_X_AXIS;
y_axis = SECOND_Y_AXIS;
++c_token;
break;
case AXES_X2Y1:
x_axis = SECOND_X_AXIS;
y_axis = FIRST_Y_AXIS;
++c_token;
break;
case AXES_NONE:
default:
int_error(c_token, "axes must be x1y1, x1y2, x2y1 or x2y2");
break;
}
}
if (almost_equals(c_token, "t$itle")) {
this_plot->title_no_enhanced = 0; /* can be enhanced */
if (parametric) {
if (xparam)
int_error(c_token, "\"title\" allowed only after parametric function fully specified");
else if (xtitle != NULL)
xtitle[0] = '\0'; /* Remove default title . */