ref: 4d4107b38547c7f9f135cc22d3a29fcbad4a8c34
dir: /sys/src/cmd/grap/print.c/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <math.h>
#include <ctype.h>
#include "grap.h"
#include "y.tab.h"
double margin = MARGIN; /* extra space around edges */
extern double frame_ht, frame_wid, ticklen;
extern int just, sizeop, tick_dir;
extern double sizexpr, lab_up, lab_rt;
char graphname[50] = "Graph";
char graphpos[200] = "";
void print(void) /* arrange final output */
{
FILE *fd;
Obj *p, *dfp;
int c;
double dx, dy, xfac, yfac;
if (tfd != NULL) {
fclose(tfd); /* end the temp file */
tfd = stdout;
}
if ((p=lookup("margin",0)) != NULL)
margin = p->fval;
if (frame_ht < 0) /* wasn't set explicitly, so use default */
frame_ht = getvar(lookup("frameht", 0));
if (frame_wid < 0)
frame_wid = getvar(lookup("framewid", 0));
dfp = NULL;
for (p = objlist; p; p = p->next) {
dprintf("print: name = <%s>, type = %d\n", p->name, p->type);
if (p->type == NAME) {
Point pt, pt1;
pt = p->pt;
pt1 = p->pt1;
fprintf(tfd, "\t# %s %g .. %g, %g .. %g\n",
p->name, pt.x, pt1.x, pt.y, pt1.y);
if (p->log & XFLAG) {
if (pt.x <= 0.0)
ERROR "can't take log of x coord %g", pt.x FATAL;
logit(pt.x);
logit(pt1.x);
}
if (p->log & YFLAG) {
if (pt.y <= 0.0)
ERROR "can't take log of y coord %g", pt.y FATAL;
logit(pt.y);
logit(pt1.y);
}
if (!(p->coord & XFLAG)) {
dx = pt1.x - pt.x;
pt.x -= margin * dx;
pt1.x += margin * dx;
}
if (!(p->coord & YFLAG)) {
dy = pt1.y - pt.y;
pt.y -= margin * dy;
pt1.y += margin * dy;
}
if (autoticks && strcmp(p->name, dflt_coord) == 0) {
p->pt = pt;
p->pt1 = pt1;
if (p->log & XFLAG) {
p->pt.x = pow(10.0, pt.x);
p->pt1.x = pow(10.0, pt1.x);
}
if (p->log & YFLAG) {
p->pt.y = pow(10.0, pt.y);
p->pt1.y = pow(10.0, pt1.y);
}
dfp = setauto();
}
dx = pt1.x - pt.x;
dy = pt1.y - pt.y;
xfac = dx > 0 ? frame_wid/dx : frame_wid/2;
yfac = dy > 0 ? frame_ht/dy : frame_ht/2;
fprintf(tfd, "define xy_%s @ ", p->name);
if (dx > 0)
fprintf(tfd, "\t(($1)-(%g))*%g", pt.x, xfac);
else
fprintf(tfd, "\t%g", xfac);
if (dy > 0)
fprintf(tfd, ", (($2)-(%g))*%g @\n", pt.y, yfac);
else
fprintf(tfd, ", %g @\n", yfac);
fprintf(tfd, "define x_%s @ ", p->name);
if (dx > 0)
fprintf(tfd, "\t(($1)-(%g))*%g @\n", pt.x, xfac);
else
fprintf(tfd, "\t%g @\n", xfac);
fprintf(tfd, "define y_%s @ ", p->name);
if (dy > 0)
fprintf(tfd, "\t(($1)-(%g))*%g @\n", pt.y, yfac);
else
fprintf(tfd, "\t%g @\n", yfac);
}
}
if (codegen)
frame();
if (codegen && autoticks && dfp)
do_autoticks(dfp);
if ((fd = fopen(tempfile, "r")) != NULL) {
while ((c = getc(fd)) != EOF)
putc(c, tfd);
fclose(fd);
}
tfd = NULL;
}
void endstat(void) /* clean up after each statement */
{
just = sizeop = 0;
lab_up = lab_rt = 0.0;
sizexpr = 0.0;
nnum = 0;
ntick = 0;
tside = 0;
tick_dir = OUT;
ticklen = TICKLEN;
}
void graph(char *s) /* graph statement */
{
char *p, *os;
int c;
if (codegen) {
fprintf(stdout, "%s: [\n", graphname);
print(); /* pump out previous graph */
fprintf(stdout, "\n] %s\n", graphpos);
reset();
}
if (s) {
dprintf("into graph with <%s>\n", s);
opentemp();
os = s;
while ((c = *s) == ' ' || c == '\t')
s++;
if (c == '\0')
ERROR "no name on graph statement" WARNING;
if (!isupper(s[0]))
ERROR "graph name %s must be capitalized", s WARNING;
for (p=graphname; (c = *s) != ' ' && c != '\t' && c != '\0'; )
*p++ = *s++;
*p = '\0';
strcpy(graphpos, s);
dprintf("graphname = <%s>, graphpos = <%s>\n", graphname, graphpos);
free(os);
}
}
void setup(void) /* done at each .G1 */
{
static int firstG1 = 0;
reset();
opentemp();
frame_ht = frame_wid = -1; /* reset in frame() */
ticklen = getvar(lookup("ticklen", 0));
if (firstG1++ == 0)
do_first();
codegen = synerr = 0;
strcpy(graphname, "Graph");
strcpy(graphpos, "");
}
void do_first(void) /* done at first .G1: definitions, etc. */
{
extern int lib;
extern char *lib_defines;
static char buf[50], buf1[50]; /* static because pbstr uses them */
FILE *fp;
extern int getpid(void);
sprintf(buf, "define pid /%d/\n", getpid());
pbstr(buf);
if (lib != 0) {
if ((fp = fopen(lib_defines, "r")) != NULL) {
sprintf(buf1, "copy \"%s\"\n", lib_defines);
pbstr(buf1);
fclose(fp);
} else {
fprintf(stderr, "grap warning: can't open %s\n", lib_defines);
}
}
}
void reset(void) /* done at each "graph ..." statement */
{
Obj *p, *np, *deflist;
extern int tlist, toffside, autodir;
curr_coord = dflt_coord;
ncoord = auto_x = 0;
autoticks = LEFT|BOT;
autodir = 0;
tside = tlist = toffside = 0;
tick_dir = OUT;
margin = MARGIN;
deflist = NULL;
for (p = objlist; p; p = np) {
np = p->next;
if (p->type == DEFNAME || p->type == VARNAME) {
p->next = deflist;
deflist = p;
} else {
free(p->name);
freeattr(p->attr);
free((char *) p);
}
}
objlist = deflist;
}
void opentemp(void)
{
if (tfd != stdout) {
if (tfd != NULL)
fclose(tfd);
if ((tfd = fopen(tempfile, "w")) == NULL) {
fprintf(stderr, "grap: can't open %s\n", tempfile);
exit(1);
}
}
}