V9/cmd/pic/main.c
#include <stdio.h>
#include <signal.h>
#include "pic.h"
#include "y.tab.h"
obj **objlist = 0; /* store the elements here */
int nobjlist = 0; /* size of objlist array */
int nobj = 0;
Attr *attr; /* attributes stored here as collected */
int nattrlist = 0;
int nattr = 0; /* number of entries in attr_list */
Text *text = 0; /* text strings stored here as collected */
int ntextlist = 0; /* size of text[] array */
int ntext = 0;
int ntext1 = 0; /* record ntext here on entry to each figure */
float curx = 0;
float cury = 0;
int hvmode = R_DIR; /* R => join left to right, D => top to bottom, etc. */
int codegen = 0; /* 1=>output for this picture; 0=>no output */
int PEseen = 0; /* 1=> PE seen during parsing */
float deltx = 6; /* max x value in output, for scaling */
float delty = 6; /* max y value in output, for scaling */
int dbg = 0;
int lineno = 0;
char *filename = "-";
int synerr = 0;
int anyerr = 0; /* becomes 1 if synerr ever 1 */
char *cmdname;
float xmin = 30000; /* min values found in actual data */
float ymin = 30000;
float xmax = -30000; /* max */
float ymax = -30000;
main(argc, argv)
char *argv[];
{
char buf[20];
extern int fpecatch();
signal(SIGFPE, fpecatch);
cmdname = argv[0];
while (argc > 1 && *argv[1] == '-') {
switch (argv[1][1]) {
case 'd':
dbg = atoi(&argv[1][2]);
if (dbg == 0)
dbg = 1;
break;
}
argc--;
argv++;
}
setdefaults();
objlist = (obj **) grow((char *)objlist, "objlist", nobjlist += 1000, sizeof(obj *));
text = (Text *) grow((char *)text, "text", ntextlist += 1000, sizeof(Text));
attr = (Attr *) grow((char *)attr, "attr", nattrlist += 100, sizeof(Attr));
sprintf(buf, "/%d/", getpid());
pushsrc(String, buf);
definition("pid");
pushsrc(File, curfile = infile);
if (argc <= 1) {
curfile->fin = stdin;
curfile->fname = tostring("-");
getdata(curfile);
} else
while (argc-- > 1) {
if ((curfile->fin = fopen(*++argv, "r")) == NULL) {
fprintf(stderr, "%s: can't open %s\n", cmdname, *argv);
exit(1);
}
curfile->fname = tostring(*argv);
getdata(curfile);
fclose(curfile->fin);
free(curfile->fname);
}
exit(anyerr);
}
fpecatch()
{
fatal("floating point exception");
}
char *grow(ptr, name, num, size) /* make array bigger */
char *ptr, *name;
int num, size;
{
char *p;
if (ptr == NULL)
p = malloc(num * size);
else
p = realloc(ptr, num * size);
if (p == NULL)
fatal("can't grow %s to %d", name, num * size);
return p;
}
static struct {
char *name;
float val;
short scalable; /* 1 => adjust when "scale" changes */
} defaults[] ={
"scale", SCALE, 1,
"lineht", HT, 1,
"linewid", HT, 1,
"moveht", HT, 1,
"movewid", HT, 1,
"dashwid", HT10, 1,
"boxht", HT, 1,
"boxwid", WID, 1,
"circlerad", HT2, 1,
"arcrad", HT2, 1,
"ellipseht", HT, 1,
"ellipsewid", WID, 1,
"arrowht", HT5, 1,
"arrowwid", HT10, 1,
"arrowhead", 2, 0, /* arrowhead style */
"textht", 0.0, 1, /* 6 lines/inch is also a useful value */
"textwid", 0.0, 1,
"maxpsht", MAXHT, 0,
"maxpswid", MAXWID, 0,
NULL, 0
};
setdefaults() /* set default sizes for variables like boxht */
{
int i;
YYSTYPE v;
for (i = 0; defaults[i].name != NULL; i++) {
v.f = defaults[i].val;
makevar(tostring(defaults[i].name), VARNAME, v);
}
}
resetvar() /* reset variables listed */
{
int i, j;
if (nattr == 0) { /* none listed, so do all */
setdefaults();
return;
}
for (i = 0; i < nattr; i++) {
for (j = 0; defaults[j].name != NULL; j++)
if (strcmp(defaults[j].name, attr[i].a_val.p) == 0) {
setfval(defaults[j].name, defaults[j].val);
free(attr[i].a_val.p);
break;
}
}
}
checkscale(s) /* if s is "scale", adjust default variables */
char *s;
{
int i;
float scale;
if (strcmp(s, "scale") == 0) {
scale = getfval("scale");
for (i = 1; defaults[i].name != NULL; i++)
if (defaults[i].scalable)
setfval(defaults[i].name, defaults[i].val * scale);
}
}
getdata()
{
char *p, buf[1000], buf1[100];
int ln;
curfile->lineno = 0;
printf(".lf 1 %s\n", curfile->fname);
while (fgets(buf, sizeof buf, curfile->fin) != NULL) {
curfile->lineno++;
if (*buf == '.' && *(buf+1) == 'P' && *(buf+2) == 'S') {
for (p = &buf[3]; *p == ' '; p++)
;
if (*p++ == '<') {
Infile svfile;
svfile = *curfile;
sscanf(p, "%s", buf1);
if ((curfile->fin=fopen(buf1, "r")) == NULL)
fatal("can't open %s", buf1);
curfile->fname = tostring(buf1);
getdata();
fclose(curfile->fin);
free(curfile->fname);
*curfile = svfile;
printf(".lf %d %s\n", curfile->lineno, curfile->fname);
continue;
}
reset();
yyparse();
anyerr += synerr;
/* yylval.i now contains 'E' or 'F' from .PE or .PF */
deltx = (xmax - xmin) / getfval("scale");
delty = (ymax - ymin) / getfval("scale");
if (buf[3] == ' ') { /* next things are wid & ht */
float xfac, yfac;
if (sscanf(&buf[4],"%f%f",&deltx,&delty) < 2)
delty = deltx * (ymax-ymin) / (xmax-xmin);
else {
xfac = deltx / (xmax-xmin);
yfac = delty / (ymax-ymin);
if (xfac <= yfac)
delty = xfac * (ymax-ymin);
else
deltx = yfac * (xmax-xmin);
}
}
dprintf("deltx = %g, delty = %g\n", deltx, delty);
if (codegen && !synerr) {
openpl(&buf[3]); /* puts out .PS, with ht & wid stuck in */
printf(".lf %d\n", curfile->lineno+1);
print(); /* assumes \n at end */
closepl(yylval.i); /* does the .PE/F */
}
printf(".lf %d\n", curfile->lineno+1);
fflush(stdout);
} else if (buf[0] == '.' && buf[1] == 'l' && buf[2] == 'f') {
if (sscanf(buf+3, "%d %s", &ln, buf1) == 2) {
free(curfile->fname);
printf(".lf %d %s\n", curfile->lineno = ln, curfile->fname = tostring(buf1));
} else
printf(".lf %d\n", curfile->lineno = ln);
} else
fputs(buf, stdout);
}
}
reset()
{
obj *op;
int i;
extern int nstack;
for (i = 0; i < nobj; i++) {
op = objlist[i];
if (op->o_type == BLOCK)
freesymtab(op->o_symtab);
free(objlist[i]);
}
nobj = 0;
nattr = 0;
for (i = 0; i < ntext; i++)
if (text[i].t_val)
free(text[i].t_val);
ntext = ntext1 = 0;
codegen = synerr = 0;
nstack = 0;
curx = cury = 0;
PEseen = 0;
hvmode = R_DIR;
xmin = ymin = 30000;
xmax = ymax = -30000;
}