syms

这是一个同样来自贝尔实验室的和UNIX有着渊源的操作系统, 其简洁的设计和实现易于我们学习和理解

	'D' 32 nsubf;
	'A' Cacheinfo 36 cache;
	'A' Cachesubf 40 subf;
	'A' Cachefont 44 sub;
	'A' Image 48 cacheimage;
};

defn
Font(addr) {
	complex Font addr;
	print("	name	", addr.name\X, "\n");
	print("	display	", addr.display\X, "\n");
	print("	height	", addr.height, "\n");
	print("	ascent	", addr.ascent, "\n");
	print("	maxldepth	", addr.maxldepth, "\n");
	print("	width	", addr.width, "\n");
	print("	ldepth	", addr.ldepth, "\n");
	print("	nsub	", addr.nsub, "\n");
	print("	age	", addr.age, "\n");
	print("	ncache	", addr.ncache, "\n");
	print("	nsubf	", addr.nsubf, "\n");
	print("	cache	", addr.cache\X, "\n");
	print("	subf	", addr.subf\X, "\n");
	print("	sub	", addr.sub\X, "\n");
	print("	cacheimage	", addr.cacheimage\X, "\n");
};

complex Point ZP;
complex Rectangle ZR;
complex Display display;
complex Font font;
complex Image screen;
sizeofAlt = 20;
aggr Alt
{
	'X' 0 c;
	'X' 4 v;
	'D' 8 op;
	'X' 12 tag;
	'U' 16 q;
};

defn
Alt(addr) {
	complex Alt addr;
	print("	c	", addr.c\X, "\n");
	print("	v	", addr.v\X, "\n");
	print("	op	", addr.op, "\n");
	print("	tag	", addr.tag\X, "\n");
	print("	q	", addr.q, "\n");
};

sizeofRef = 4;
aggr Ref
{
	'D' 0 ref;
};

defn
Ref(addr) {
	complex Ref addr;
	print("	ref	", addr.ref, "\n");
};

sizeofCursor = 72;
aggr Cursor
{
	Point 0 offset;
	'a' 8 clr;
	'a' 40 set;
};

defn
Cursor(addr) {
	complex Cursor addr;
	print("Point offset {\n");
	Point(addr.offset);
	print("}\n");
	print("	clr	", addr.clr, "\n");
	print("	set	", addr.set, "\n");
};

sizeofMouse = 16;
aggr Mouse
{
	'D' 0 buttons;
	Point 4 xy;
	'U' 12 msec;
};

defn
Mouse(addr) {
	complex Mouse addr;
	print("	buttons	", addr.buttons, "\n");
	print("Point xy {\n");
	Point(addr.xy);
	print("}\n");
	print("	msec	", addr.msec, "\n");
};

sizeofMousectl = 44;
aggr Mousectl
{
	{
	'D' 0 buttons;
	Point 4 xy;
	'U' 12 msec;
	};
	'X' 16 c;
	'X' 20 reshapec;
	'X' 24 file;
	'D' 28 mfd;
	'D' 32 cfd;
	'D' 36 pid;
	'A' Image 40 image;
};

defn
Mousectl(addr) {
	complex Mousectl addr;
	print("Mouse {\n");
		Mouse(addr+0);
	print("}\n");
	print("	c	", addr.c\X, "\n");
	print("	reshapec	", addr.reshapec\X, "\n");
	print("	file	", addr.file\X, "\n");
	print("	mfd	", addr.mfd, "\n");
	print("	cfd	", addr.cfd, "\n");
	print("	pid	", addr.pid, "\n");
	print("	image	", addr.image\X, "\n");
};

sizeofMenu = 12;
aggr Menu
{
	'X' 0 item;
	'X' 4 gen;
	'D' 8 lasthit;
};

defn
Menu(addr) {
	complex Menu addr;
	print("	item	", addr.item\X, "\n");
	print("	gen	", addr.gen\X, "\n");
	print("	lasthit	", addr.lasthit, "\n");
};

sizeofKeyboardctl = 20;
aggr Keyboardctl
{
	'X' 0 c;
	'X' 4 file;
	'D' 8 consfd;
	'D' 12 ctlfd;
	'D' 16 pid;
};

defn
Keyboardctl(addr) {
	complex Keyboardctl addr;
	print("	c	", addr.c\X, "\n");
	print("	file	", addr.file\X, "\n");
	print("	consfd	", addr.consfd, "\n");
	print("	ctlfd	", addr.ctlfd, "\n");
	print("	pid	", addr.pid, "\n");
};

BACK = 0;
HIGH = 1;
BORD = 2;
TEXT = 3;
HTEXT = 4;
NCOL = 5;
sizeof_3_ = 4;
aggr _3_
{
	'd' 0 bc;
	'd' 2 minwid;
};

defn
_3_(addr) {
	complex _3_ addr;
	print("	bc	", addr.bc, "\n");
	print("	minwid	", addr.minwid, "\n");
};

sizeof_4_ = 4;
aggr _4_
{
	'X' 0 ptr;
	{
	'd' 0 bc;
	'd' 2 minwid;
	};
};

defn
_4_(addr) {
	complex _4_ addr;
	print("	ptr	", addr.ptr\X, "\n");
	print("_3_ {\n");
		_3_(addr+0);
	print("}\n");
};

sizeofFrbox = 12;
aggr Frbox
{
	'D' 0 wid;
	'D' 4 nrune;
	{
	'X' 8 ptr;
	{
	'd' 8 bc;
	'd' 10 minwid;
	};
	};
};

defn
Frbox(addr) {
	complex Frbox addr;
	print("	wid	", addr.wid, "\n");
	print("	nrune	", addr.nrune, "\n");
	print("_4_ {\n");
		_4_(addr+8);
	print("}\n");
};

complex Font font;
complex Display display;
sizeofFrame = 108;
aggr Frame
{
	'A' Font 0 font;
	'A' Display 4 display;
	'A' Image 8 b;
	'a' 12 cols;
	Rectangle 32 r;
	Rectangle 48 entire;
	'X' 64 scroll;
	'A' Frbox 68 box;
	'U' 72 p0;
	'U' 76 p1;
	'u' 80 nbox;
	'u' 82 nalloc;
	'u' 84 maxtab;
	'u' 86 nchars;
	'u' 88 nlines;
	'u' 90 maxlines;
	'u' 92 lastlinefull;
	'u' 94 modified;
	'A' Image 96 tick;
	'A' Image 100 tickback;
	'D' 104 ticked;
};

defn
Frame(addr) {
	complex Frame addr;
	print("	font	", addr.font\X, "\n");
	print("	display	", addr.display\X, "\n");
	print("	b	", addr.b\X, "\n");
	print("	cols	", addr.cols, "\n");
	print("Rectangle r {\n");
	Rectangle(addr.r);
	print("}\n");
	print("Rectangle entire {\n");
	Rectangle(addr.entire);
	print("}\n");
	print("	scroll	", addr.scroll\X, "\n");
	print("	box	", addr.box\X, "\n");
	print("	p0	", addr.p0, "\n");
	print("	p1	", addr.p1, "\n");
	print("	nbox	", addr.nbox, "\n");
	print("	nalloc	", addr.nalloc, "\n");
	print("	maxtab	", addr.maxtab, "\n");
	print("	nchars	", addr.nchars, "\n");
	print("	nlines	", addr.nlines, "\n");
	print("	maxlines	", addr.maxlines, "\n");
	print("	lastlinefull	", addr.lastlinefull, "\n");
	print("	modified	", addr.modified, "\n");
	print("	tick	", addr.tick\X, "\n");
	print("	tickback	", addr.tickback\X, "\n");
	print("	ticked	", addr.ticked, "\n");
};

None = 0;
Some = 1;
All = 2;
Clicktime = 1000;
sizeofFlayer = 172;
aggr Flayer
{
	Frame 0 f;
	'D' 108 origin;
	'D' 112 p0;
	'D' 116 p1;
	'D' 120 click;
	'X' 124 textfn;
	'D' 128 user0;
	'X' 132 user1;
	Rectangle 136 entire;
	Rectangle 152 scroll;
	'D' 168 visible;
};

defn
Flayer(addr) {
	complex Flayer addr;
	print("Frame f {\n");
	Frame(addr.f);
	print("}\n");
	print("	origin	", addr.origin, "\n");
	print("	p0	", addr.p0, "\n");
	print("	p1	", addr.p1, "\n");
	print("	click	", addr.click, "\n");
	print("	textfn	", addr.textfn\X, "\n");
	print("	user0	", addr.user0, "\n");
	print("	user1	", addr.user1\X, "\n");
	print("Rectangle entire {\n");
	Rectangle(addr.entire);
	print("}\n");
	print("Rectangle scroll {\n");
	Rectangle(addr.scroll);
	print("}\n");
	print("	visible	", addr.visible, "\n");
};

Up = 0;
Down = 1;
sizeofSection = 12;
aggr Section
{
	'D' 0 nrunes;
	'X' 4 text;
	'A' Section 8 next;
};

defn
Section(addr) {
	complex Section addr;
	print("	nrunes	", addr.nrunes, "\n");
	print("	text	", addr.text\X, "\n");
	print("	next	", addr.next\X, "\n");
};

sizeofRasp = 8;
aggr Rasp
{
	'D' 0 nrunes;
	'A' Section 4 sect;
};

defn
Rasp(addr) {
	complex Rasp addr;
	print("	nrunes	", addr.nrunes, "\n");
	print("	sect	", addr.sect\X, "\n");
};

sizeofText = 876;
aggr Text
{
	Rasp 0 rasp;
	'd' 8 nwin;
	'd' 10 front;
	'u' 12 tag;
	'C' 14 lock;
	'a' 16 l;
};

defn
Text(addr) {
	complex Text addr;
	print("Rasp rasp {\n");
	Rasp(addr.rasp);
	print("}\n");
	print("	nwin	", addr.nwin, "\n");
	print("	front	", addr.front, "\n");
	print("	tag	", addr.tag, "\n");
	print("	lock	", addr.lock, "\n");
	print("	l	", addr.l, "\n");
};

sizeofReadbuf = 8196;
aggr Readbuf
{
	'd' 0 n;
	'a' 2 data;
};

defn
Readbuf(addr) {
	complex Readbuf addr;
	print("	n	", addr.n, "\n");
	print("	data	", addr.data, "\n");
};

RHost = 0;
RKeyboard = 1;
RMouse = 2;
RPlumb = 3;
RReshape = 4;
NRes = 5;
complex Cursor bullseye;
complex Cursor deadmouse;
complex Cursor lockarrow;
complex Cursor cursor;
complex Flayer which;
complex Flayer work;
complex Text cmd;
complex Mousectl mousectl;
complex Keyboardctl keyboardctl;
complex Mouse mousep;
Tversion = 0;
Tstartcmdfile = 1;
Tcheck = 2;
Trequest = 3;
Torigin = 4;
Tstartfile = 5;
Tworkfile = 6;
Ttype = 7;
Tcut = 8;
Tpaste = 9;
Tsnarf = 10;
Tstartnewfile = 11;
Twrite = 12;
Tclose = 13;
Tlook = 14;
Tsearch = 15;
Tsend = 16;
Tdclick = 17;
Tstartsnarf = 18;
Tsetsnarf = 19;
Tack = 20;
Texit = 21;
Tplumb = 22;
TMAX = 23;
Hversion = 0;
Hbindname = 1;
Hcurrent = 2;
Hnewname = 3;
Hmovname = 4;
Hgrow = 5;
Hcheck0 = 6;
Hcheck = 7;
Hunlock = 8;
Hdata = 9;
Horigin = 10;
Hunlockfile = 11;
Hsetdot = 12;
Hgrowdata = 13;
Hmoveto = 14;
Hclean = 15;
Hdirty = 16;
Hcut = 17;
Hsetpat = 18;
Hdelname = 19;
Hclose = 20;
Hsetsnarf = 21;
Hsnarflen = 22;
Hack = 23;
Hexit = 24;
Hplumb = 25;
HMAX = 26;
sizeofHeader = 4;
aggr Header
{
	'b' 0 type;
	'b' 1 count0;
	'b' 2 count1;
	'a' 3 data;
};

defn
Header(addr) {
	complex Header addr;
	print("	type	", addr.type, "\n");
	print("	count0	", addr.count0, "\n");
	print("	count1	", addr.count1, "\n");
	print("	data	", addr.data, "\n");
};

complex Text cmd;
complex Cursor cursor;
complex Flayer which;
complex Flayer work;
complex Text threadmain:t;
complex Rectangle threadmain:r;
complex Flayer threadmain:nwhich;
complex Flayer current:nw;
complex Text current:t;
complex Flayer closeup:l;
complex Text closeup:t;
complex Text findl:t;
complex Flayer duplicate:l;
complex Rectangle duplicate:r;
complex Font duplicate:f;
complex Text duplicate:t;
complex Flayer duplicate:nl;
complex Rectangle getr:rp;
complex Point getr:p;
complex Rectangle getr:r;
complex Text snarf:t;
complex Flayer snarf:l;
complex Text cut:t;
complex Flayer cut:l;
complex Text paste:t;
complex Flayer scrorigin:l;
complex Text scrorigin:t;
complex Rasp raspc:r;
complex Rasp ctlw:r;
complex Rasp ctlu:r;
complex Flayer center:l;
complex Text center:t;
complex Flayer onethird:l;
complex Text onethird:t;
complex Rectangle onethird:s;
complex Text flushtyping:t;
complex Flayer type:l;
complex Text type:t;
complex Flayer gettext:l;
complex Text gettext:t;
complex Flayer scrtotal:l;