ref: fed50d79d38881437639f3189b4a99aee93daa9a
dir: /sys/src/cmd/plot/plot.c/
#include <u.h>
#include <libc.h>
#include <bio.h>
#include "plot.h"
#include <draw.h>
#include <thread.h>
#include <mouse.h>
#include <keyboard.h>
void define(char*);
void call(char*);
void include(char*);
int process(Biobuf*);
int server(void);
enum{
ARC,
BOX,
CALL,
CFILL,
CIRC,
CLOSEPL,
COLOR,
CSPLINE,
DEFINE,
DISK,
DSPLINE,
ERASE,
FILL,
FRAME,
FSPLINE,
GRADE,
IDLE,
INCLUDE,
LINE,
LSPLINE,
MOVE,
OPENPL,
PARABOLA,
PEN,
PAUSE,
POINT,
POLY,
RANGE,
RESTORE,
RMOVE,
RVEC,
SAVE,
SBOX,
SPLINE,
TEXT,
VEC,
LAST
};
struct pcall {
char *cc;
int numc;
} plots[] = {
[ARC] "a", 1,
[BOX] "bo", 2,
[CALL] "ca", 2,
[CFILL] "cf", 2,
[CIRC] "ci", 2,
[CLOSEPL] "cl", 2,
[COLOR] "co", 2,
[CSPLINE] "cs", 2,
[DEFINE] "de", 2,
[DISK] "di", 2,
[DSPLINE] "ds", 2,
[ERASE] "e", 1,
[FILL] "fi", 2,
[FRAME] "fr", 2,
[FSPLINE] "fs", 2,
[GRADE] "g", 1,
[IDLE] "id", 2,
[INCLUDE] "in", 2,
[LINE] "li", 2,
[LSPLINE] "ls", 2,
[MOVE] "m", 1,
[OPENPL] "o", 1,
[PARABOLA] "par", 3,
[PEN] "pe", 2,
[PAUSE] "pau", 3,
[POINT] "poi", 3,
[POLY] "pol", 3,
[RANGE] "ra", 2,
[RESTORE] "re", 2,
[RMOVE] "rm", 2,
[RVEC] "rv", 2,
[SAVE] "sa", 2,
[SBOX] "sb", 2,
[SPLINE] "sp", 2,
[TEXT] "t", 1,
[VEC] "v", 1,
[LAST] 0, 0,
};
struct pcall *pplots; /* last command read */
#define MAXL 16
struct fcall {
char *name;
char *stash;
} flibr[MAXL]; /* define strings */
struct fcall *fptr = flibr;
#define NFSTACK 50
struct fstack{
char name[128];
int peekc;
int lineno;
char *corebuf;
Biobuf *fd;
double scale;
}fstack[NFSTACK]; /* stack of open input files & defines */
struct fstack *fsp=fstack;
#define NARGSTR 8192
char argstr[NARGSTR+1]; /* string arguments */
#define NX 8192
double x[NX]; /* numeric arguments */
#define NPTS 256
int cnt[NPTS]; /* control-polygon vertex counts */
double *pts[NPTS]; /* control-polygon vertex pointers */
extern void m_swapbuf(void); /* reaching into implementation. ick. */
extern Image *offscreen;
void
resize(Point p)
{
int fd;
fd = open("/dev/wctl", OWRITE);
if(fd >= 0){
fprint(fd, "resize -dx %d -dy %d", p.x+4*2, p.y+4*2);
close(fd);
}
}
void
resizeto(Point p)
{
Point s;
s = (Point){Dx(screen->r), Dy(screen->r)};
if(eqpt(p, s))
return;
resize(p);
}
void
eresized(int new)
{
if(new && getwindow(display, Refnone) < 0)
sysfatal("plot: can't reattach to window: %r\n");
// resizeto((Point){Dx(offscreen->r)+4, Dy(offscreen->r)+4});
m_swapbuf();
}
char *items[]={
"exit",
0
};
Menu menu={items};
void
mouseproc(void*)
{
void *v;
Rune r;
Alt alts[4];
Keyboardctl *k;
Mousectl *m;
Mouse mc;
enum{Amouse, Akbd, Aresize, Aend};
m = initmouse(nil, screen);
k = initkeyboard(nil);
memset(alts, 0, sizeof alts);
alts[Amouse].c = m->c;
alts[Amouse].v = &mc;
alts[Amouse].op = CHANRCV;
alts[Akbd].c = k->c;
alts[Akbd].v = &r;
alts[Akbd].op = CHANRCV;
alts[Aresize].c = m->resizec;
alts[Aresize].v = &v;
alts[Aresize].op = CHANRCV;
alts[Aend].op = CHANEND;
for(;;)
switch(alt(alts)){
default:
sysfatal("mouse!");
case Amouse:
if(mc.buttons & 4) {
if(menuhit(3, m, &menu, nil) == 0)
threadexitsall("");
}
break;
case Akbd:
switch(r){
case 'q':
case Kdel:
case Keof:
threadexitsall("");
}
break;
case Aresize:
eresized(1);
;
}
}
void
threadmain(int arc, char *arv[]){
char *ap;
Biobuf *bp;
int fd;
int i;
int dflag;
char *oflag;
bp = 0;
fd = dup(0, -1); /* because openpl will close 0! */
dflag=0;
oflag="";
argv0 = arv[0];
for(i=1;i!=arc;i++) if(arv[i][0]=='-') switch(arv[i][1]){
case 'd': dflag=1; break;
case 'o': oflag=arv[i]+2; break;
case 's': fd=server(); break;
}
openpl(oflag);
proccreate(mouseproc, nil, 32*1024);
if(dflag)
doublebuffer();
for (; arc > 1; arc--, arv++) {
if (arv[1][0] == '-') {
ap = arv[1];
ap++;
switch (*ap) {
default:
fprint(2, "%s not allowed as argument\n", ap);
exits("usage");
case 'T': break;
case 'D': break;
case 'd': break;
case 'o': break;
case 'W': break;
case 's': break;
case 'e': erase(); break;
case 'C': closepl(); break;
case 'w': ppause(); break;
case 'c': color(ap+1); break;
case 'f': cfill(ap+1); break;
case 'p': pen(ap+1); break;
case 'g': grade(atof(ap+1)); break;
}
}
else if ((bp = Bopen(arv[1], OREAD)) == 0) {
perror(arv[1]);
fprint(2, "Cannot find file %s\n", arv[1]);
}
else if(process(bp)) Bterm(fsp->fd);
else break;
}
if (bp == 0){
bp = malloc(sizeof *bp);
Binit(bp, fd, OREAD);
process(bp);
}
closepl();
flushimage(display, 1);
for(;;)
sleep(1000);
}
int isalpha(int c)
{
return ('a'<=c && c<='z') || ('A'<=c && c<='Z');
}
int isupper(int c)
{
return 'A'<=c && c<='Z';
}
int isdigit(int c)
{
return '0'<=c && c<='9';
}
int ispunct(int c)
{
return strchr("!\"#$%&'()*+,-./:;<=>?@[\]^_`{|}~", c)!=0;
}
int isspace(int c)
{
return strchr(" \t\n\v\f\r", c)!=0;
}
int nextc(void){
int c;
Rune r;
for(;;){
if(fsp->peekc!=Beof){
c=fsp->peekc;
fsp->peekc=Beof;
return c;
}
if(fsp->fd)
c=Bgetrune(fsp->fd);
else if(*fsp->corebuf){
fsp->corebuf+=chartorune(&r, fsp->corebuf);
c=r;
}else
c=Beof;
if(c!=Beof || fsp==fstack) break;
if(fsp->fd) Bterm(fsp->fd);
--fsp;
}
if(c=='\n') fsp->lineno++;
return c;
}
/*
* Read a string into argstr -- ignores leading spaces
* and an optional leading quote-mark
*/
void
strarg(void){
int c;
Rune r;
int quote=0;
char *s=argstr;
do
c=nextc();
while(c==' ' || c=='\t');
if(c=='\'' || c=='"'){
quote=c;
c=nextc();
}
r = 0;
while(c!='\n' && c!=Beof){
r=c;
s+=runetochar(s, &r);
c=nextc();
}
if(quote && s!=argstr && r==quote) --s;
*s='\0';
}
/*
* Read a floating point number into argstr
*/
numstring(void){
int ndp=0;
int ndig=0;
char *s=argstr;
int c=nextc();
if(c=='+' || c=='-'){
*s++=c;
c=nextc();
}
while(isdigit(c) || c=='.'){
if(s!=&argstr[NARGSTR]) *s++=c;
if(c=='.') ndp++;
else ndig++;
c=nextc();
}
if(ndp>1 || ndig==0){
fsp->peekc=c;
return 0;
}
if(c=='e' || c=='E'){
if(s!=&argstr[NARGSTR]) *s++=c;
c=nextc();
if(c=='+' || c=='-'){
if(s!=&argstr[NARGSTR]) *s++=c;
c=nextc();
}
if(!isdigit(c)){
fsp->peekc=c;
return 0;
}
while(isdigit(c)){
if(s!=&argstr[NARGSTR]) *s++=c;
c=nextc();
}
}
fsp->peekc=c;
*s='\0';
return 1;
}
/*
* Read n numeric arguments, storing them in
* x[0], ..., x[n-1]
*/
void
numargs(int n){
int i, c;
for(i=0;i!=n;i++){
do{
c=nextc();
}while(strchr(" \t\n", c) || c!='.' && c!='+' && c!='-' && ispunct(c));
fsp->peekc=c;
if(!numstring())
sysfatal("%s:%d: number expected\n", fsp->name, fsp->lineno);
x[i]=atof(argstr)*fsp->scale;
}
}
/*
* Read a list of lists of control vertices, storing points in x[.],
* pointers in pts[.] and counts in cnt[.]
*/
void
polyarg(void){
int nleft, l, r, c;
double **ptsp=pts, *xp=x;
int *cntp=cnt;
do{
c=nextc();
}while(c==' ' || c=='\t');
if(c=='{'){
l='{';
r='}';
}
else{
l=r='\n';
fsp->peekc=c;
}
nleft=1;
*cntp=0;
*ptsp=xp;
for(;;){
c=nextc();
if(c==r){
if(*cntp){
if(*cntp&1)
sysfatal("%s:%d: phase error", fsp->name, fsp->lineno);
*cntp/=2;
if(ptsp==&pts[NPTS])
sysfatal("%s:%d: out of polygons", fsp->name, fsp->lineno);
*++ptsp=xp;
*++cntp=0;
}
if(--nleft==0) return;
}
else switch(c){
case Beof: return;
case ' ': break;
case '\t': break;
case '\n': break;
case '.': case '+': case '-':
case '0': case '1': case '2': case '3': case '4':
case '5': case '6': case '7': case '8': case '9':
fsp->peekc=c;
if(!numstring())
sysfatal("%s:%d: expected number", fsp->name, fsp->lineno);
if(xp==&x[NX])
sysfatal("%s:%d: out of space", fsp->name, fsp->lineno);
*xp++=atof(argstr);
++*cntp;
break;
default:
if(c==l) nleft++;
else if(!ispunct(c)){
fsp->peekc=c;
return;
}
}
}
}
process(Biobuf *fd){
char *s;
int c;
fsp=fstack;
fsp->fd=fd;
fsp->corebuf=0;
fsp->peekc=Beof;
fsp->lineno=1;
fsp->scale=1.;
for(;;){
do
c=nextc();
while(c==' ' || c=='\t');
if(c==':'){
do
c=nextc();
while(c!='\n' && c!=Beof);
if(c==Beof) break;
continue;
}
while(c=='.'){
c=nextc();
if(isdigit(c)){
if(fsp->fd) Bungetc(fsp->fd);
else --fsp->corebuf;
c='.';
break;
}
}
if(c==Beof) break;
if(c=='\n') continue;
if(isalpha(c)){
s=argstr;
do{
if(isupper(c)) c=tolower(c);
if(s!=&argstr[NARGSTR]) *s++=c;
c=nextc();
}while(isalpha(c));
fsp->peekc=c;
*s='\0';
for(pplots=plots;pplots->cc;pplots++)
if(strncmp(argstr, pplots->cc, pplots->numc)==0)
break;
if(pplots->cc==0)
sysfatal("%s:%d: %s unknown", fsp->name, fsp->lineno, argstr);
}
else{
fsp->peekc=c;
}
if(!pplots)
sysfatal("%s:%d: no command\n", fsp->name, fsp->lineno);
switch(pplots-plots){
case ARC: numargs(7); rarc(x[0],x[1],x[2],x[3],x[4],x[5],x[6]); break;
case BOX: numargs(4); box(x[0], x[1], x[2], x[3]); break;
case CALL: strarg(); call(argstr); pplots=0; break;
case CFILL: strarg(); cfill(argstr); pplots=0; break;
case CIRC: numargs(3); circ(x[0], x[1], x[2]); break;
case CLOSEPL: strarg(); closepl(); pplots=0; break;
case COLOR: strarg(); color(argstr); pplots=0; break;
case CSPLINE: polyarg(); splin(4, cnt, pts); break;
case DEFINE: strarg(); define(argstr); pplots=0; break;
case DISK: numargs(3); plotdisc(x[0], x[1], x[2]); break;
case DSPLINE: polyarg(); splin(3, cnt, pts); break;
case ERASE: strarg(); erase(); pplots=0; break;
case FILL: polyarg(); fill(cnt, pts); break;
case FRAME: numargs(4); frame(x[0], x[1], x[2], x[3]); break;
case FSPLINE: polyarg(); splin(1, cnt, pts); break;
case GRADE: numargs(1); grade(x[0]); break;
case IDLE: strarg(); idle(); pplots=0; break;
case INCLUDE: strarg(); include(argstr); pplots=0; break;
case LINE: numargs(4); plotline(x[0], x[1], x[2], x[3]); break;
case LSPLINE: polyarg(); splin(2, cnt, pts); break;
case MOVE: numargs(2); move(x[0], x[1]); break;
case OPENPL: strarg(); openpl(argstr); pplots=0; break;
case PARABOLA: numargs(6); parabola(x[0],x[1],x[2],x[3],x[4],x[5]); break;
case PAUSE: strarg(); ppause(); pplots=0; break;
case PEN: strarg(); pen(argstr); pplots=0; break;
case POINT: numargs(2); dpoint(x[0], x[1]); break;
case POLY: polyarg(); plotpoly(cnt, pts); break;
case RANGE: numargs(4); range(x[0], x[1], x[2], x[3]); break;
case RESTORE: strarg(); restore(); pplots=0; break;
case RMOVE: numargs(2); rmove(x[0], x[1]); break;
case RVEC: numargs(2); rvec(x[0], x[1]); break;
case SAVE: strarg(); save(); pplots=0; break;
case SBOX: numargs(4); sbox(x[0], x[1], x[2], x[3]); break;
case SPLINE: polyarg(); splin(0, cnt, pts); break;
case TEXT: strarg(); text(argstr); pplots=0; break;
case VEC: numargs(2); vec(x[0], x[1]); break;
default:
sysfatal("%s:%d: plot: missing case %zd\n", fsp->name, fsp->lineno, pplots-plots);
}
}
return 1;
}
char *names = 0;
char *enames = 0;
char *bstash = 0;
char *estash = 0;
unsigned size = 1024;
char *nstash = 0;
void define(char *a){
char *ap;
short i, j;
int curly = 0;
ap = a;
while(isalpha(*ap))ap++;
if(ap == a)
sysfatal("plot: no name with define\n");
i = ap - a;
if(names+i+1 > enames){
names = malloc((unsigned)512);
enames = names + 512;
}
fptr->name = names;
strncpy(names, a,i);
names += i;
*names++ = '\0';
if(!bstash){
bstash = nstash = malloc(size);
estash = bstash + size;
}
fptr->stash = nstash;
while(*ap != '{')
if(*ap == '\n'){
if((ap=Brdline(fsp->fd, '\n'))==0)
sysfatal("plot: unexpected eof");
}
else ap++;
while((j=Bgetc(fsp->fd))!= Beof){
if(j == '{')curly++;
else if(j == '}'){
if(curly == 0)break;
else curly--;
}
*nstash++ = j;
if(nstash == estash){
free(bstash);
size += 1024;
bstash = realloc(bstash,size);
if(bstash == nil)
sysfatal("plot: realloc: %r");
estash = bstash+size;
}
}
*nstash++ = '\0';
if(fptr++ >= &flibr[MAXL])
sysfatal("too many objects");
}
void call(char *a){
char *ap;
struct fcall *f;
char sav;
double SC;
ap = a;
while(isalpha(*ap))ap++;
sav = *ap;
*ap = '\0';
for(f=flibr;f<fptr;f++){
if (!(strcmp(a, f->name)))
break;
}
if(f == fptr)
sysfatal("plot: object %s not defined",a);
*ap = sav;
while (isspace(*ap) || *ap == ',')
ap++;
if (*ap != '\0')
SC = atof(ap);
else SC = 1.;
if(++fsp==&fstack[NFSTACK])
sysfatal("plot: input stack overflow");
snprint(fsp->name, sizeof fsp->name, "call %s", f->name);
fsp->peekc=Beof;
fsp->lineno=1;
fsp->corebuf=f->stash;
fsp->fd=0;
fsp->scale=fsp[-1].scale*SC;
}
void include(char *a){
Biobuf *fd;
fd=Bopen(a, OREAD);
if(fd==0)
sysfatal("plot: cant include %s: %r", a);
if(++fsp==&fstack[NFSTACK])
sysfatal("plot: input stack overflow");
snprint(fsp->name, sizeof fsp->name, "%s", a);
fsp->peekc=Beof;
fsp->lineno=1;
fsp->corebuf=0;
fsp->fd=fd;
}
/*
* Doesn't work. Why?
*/
int server(void){
int fd, p[2];
char buf[32];
pipe(p);
if((fd = create("/srv/plot", OWRITE, 0666)) < 0)
sysfatal("open: %r");
sprint(buf, "%d", p[1]);
write(fd, buf, strlen(buf));
close(fd);
close(p[1]);
return p[0];
}