CharonUtils: module{	PATH: con "/dis/charon/chutils.dis"; 	# Modules for everyone to share	C: Ctype;	E: Events;	G: Gui;	L: Layout;	I: Img;	B: Build;	LX: Lex;	J: Script;	CH: Charon;	CK: Cookiesrv; 	# HTTP methods	HGet, HPost : con iota;	hmeth: array of string; 	# Media types (must track mnames in chutils.b)	ApplMsword, ApplOctets, ApplPdf, ApplPostscript, ApplRtf,	ApplFramemaker, ApplMsexcel, ApplMspowerpoint, UnknownType, 	Audio32kadpcm, AudioBasic, 	ImageCgm, ImageG3fax, ImageGif, ImageIef, ImageJpeg, ImagePng, ImageTiff,	ImageXBit, ImageXBit2, ImageXBitmulti, ImageXInfernoBit, ImageXXBitmap, 	ModelVrml, 	MultiDigest, MultiMixed, 	TextCss, TextEnriched, TextHtml, TextJavascript, TextPlain, TextRichtext,	TextSgml, TextTabSeparatedValues, TextXml, 	VideoMpeg, VideoQuicktime : con iota; 	mnames: array of string; 	# Netconn states	NCfree, NCidle, NCconnect, NCgethdr, NCgetdata,	NCdone, NCerr : con iota; 	ncstatenames: array of string; 	# Netcomm synch protocol values	NGstartreq, NGwaitreq, NGstatechg, NGfreebs : con iota; 	# Colors	White: con 16rFFFFFF;	Black: con 16r000000;	Grey: con 16rdddddd;	DarkGrey: con 16r9d9d9d;	LightGrey: con 16rededed;	Blue: con 16r0000CC;	Navy: con 16r000080;	Red: con 16rFF0000;	Green: con 16r00FF00;	DarkRed: con 16r9d0000; 	# Header major status values (code/100)	HSNone, HSInformation, HSOk, HSRedirect, HSError, HSServererr : con iota;	hsnames: array of string; 	# Individual status code values (HTTP, but use for other transports too)	HCContinue:		con 100;	HCSwitchProto:		con 101;	HCOk:			con 200;	HCCreated:		con 201;	HCAccepted:		con 202;	HCOkNonAuthoritative:	con 203;	HCNoContent:		con 204;	HCResetContent:		con 205;	HCPartialContent:	con 206;	HCMultipleChoices:	con 300;	HCMovedPerm:		con 301;	HCMovedTemp:		con 302;	HCSeeOther:		con 303;	HCNotModified:		con 304;	HCUseProxy:		con 305;	HCBadRequest:		con 400;	HCUnauthorized:		con 401;	HCPaymentRequired:	con 402;	HCForbidden:		con 403;	HCNotFound:		con 404;	HCMethodNotAllowed:	con 405;	HCNotAcceptable:	con 406;	HCProxyAuthRequired:	con 407;	HCRequestTimeout:	con 408;	HCConflict:		con 409;	HCGone:			con 410;	HCLengthRequired:	con 411;	HCPreconditionFailed:	con 412;	HCRequestTooLarge:	con 413;	HCRequestURITooLarge:	con 414;	HCUnsupportedMedia:	con 415;	HCRangeInvalid:		con 416;	HCExpectFailed:		con 419;	HCServerError:		con 500;	HCNotImplemented:	con 501;	HCBadGateway:		con 502;	HCServiceUnavailable:	con 503;	HCGatewayTimeout:	con 504;	HCVersionUnsupported:	con 505;	HCRedirectionFailed:	con 506; 	# Max number of redirections tolerated	Maxredir : con 10; 	# Image Level config options	ImgNone, ImgNoAnim, ImgProgressive, ImgFull: con iota;  	# SSL connection version 	NOSSL, SSLV2, SSLV3, SSLV23: con iota; 	# User Configuration Information (Options)	# Debug option letters:	# 'd' -> Basic operation info (navigation, etc.)	# 'e' -> Events (timing of progress through get/layout/image conversion)	# 'h' -> Build layout items from lex tokens	# 'i' -> Image conversion	# 'l' -> Layout	# 'n' -> transport (Network access)	# 'o' -> always use old http (http/1.0)	# 'p' -> synch Protocol between ByteSource/Netconn	# 'r' -> Resource usage	# 's' -> Scripts	# 't' -> Table layout	# 'u' -> use Uninstalled dis modules	# 'w' -> Warn about recoverable problems in retrieved pages	# 'x -> lex Html tokens	Config: adt	{		userdir:	string;		# where to find bookmarks, cache, etc.		srcdir:		string;		# where to find charon src (for debugging)		starturl:	string;# never nil (could be last of command args)		change_homeurl:	int;		homeurl:	string;# never nil		helpurl:	string; 		usessl:		int; # use ssl version 2, 3 or both 		devssl:		int; # use devssl		custbkurl:	string; # where are customized bookmarks-never nil		dualbkurl:	string; # where is the dual bookmark page-never nil		httpproxy:	ref Url->Parsedurl;# nil, if no proxy		noproxydoms:	list of string; # domains that don't require proxy		buttons:	string;		# customized buttons		framework: string;		# customized gui framework		defaultwidth:	int;		# of entire browser		defaultheight:	int;		# of entire browser		x:			int;		# initial x position for browser		y:			int;		# initial y position for browser		nocache:	int;		# true if shouldn't retrieve from or store to		maxstale:	int;		# allow cache hit even if exceed expiration by maxstale		imagelvl:	int;		# ImgNone, etc.		imagecachenum: int;	# imcache.nlimit		imagecachemem: int;	# imcache.memlimit		docookies:	int;		# allow cookie storage/sending?		doscripts:		int;		# allow scripts to execute?		httpminor:	int;		# use HTTP 1.httpminor		agentname:	string;	# what to send in HTTP header		nthreads:		int;		# number of simultaneous gets allowed		offersave:	int;		# offer to save a file of a type that can't be handled		charset: string;			# default character set		plumbport: string;		# from/to plumbing port name (default = "web")		wintitle: string;		dbgfile:		string;	# file to write debug messages to		dbg:		array of byte;	# ascii letters for different debugging kinds	}; 	# Information for fulfilling HTTP request	ReqInfo : adt	{		url:	ref Url->Parsedurl;	# should be absolute		method:	int;			# HGet or HPost		body:	array of byte;		# used for HPost		auth:	string;			# optional auth info		target:	string;			# target frame name	}; 	MaskedImage: adt {		im:		ref Draw->Image;		# the image		mask:	ref Draw->Image;		# if non-nil, a mask for the image		delay:	int;			# if animated, delay in millisec before next frame		more:	int;			# true if more frames follow		bgcolor:	int;			# if not -1, restore to this (RGB) color before next frame		origin:	Draw->Point;		# origin of im relative to first frame of an animation 		free: fn(mim: self ref MaskedImage);	}; 	# Charon Image info.	# If this is an animated image then len mims > 1	CImage: adt	{		src:	ref Url->Parsedurl;	# source of image		lowsrc:	ref Url->Parsedurl;	# for low-resolution devices		actual: ref Url->Parsedurl;	# what came back as actual source of image		imhash:	int;			# hash of src, for fast comparison		width:	int;		height:	int;		next:	cyclic ref CImage;	# next (newer) image in cache		mims: array of ref MaskedImage;		complete: int;			# JavaScript Image.complete 		new: fn(src: ref Url->Parsedurl, lowsrc: ref Url->Parsedurl, width, height: int) : ref CImage;		match: fn(a: self ref CImage, b: ref CImage) : int;		bytes: fn(ci: self ref CImage) : int;	}; 	# In-memory cache of CImages	ImageCache: adt	{		imhd:	ref CImage;	# head (LRU) of cache chain (linked through CImage.next)		imtl:		ref CImage;	# tail MRU) of cache chain		n:	int;			# size of chain		memused: int;		# current total of image mem used by cached images		memlimit: int;		# keep memused less than this		nlimit: int;			# keep n less than this 		init: fn(ic: self ref ImageCache);		resetlimits: fn(ic: self ref ImageCache);		look: fn(ic: self ref ImageCache, ci: ref CImage) : ref CImage;		add: fn(ic: self ref ImageCache, ci: ref CImage);		deletelru: fn(ic: self ref ImageCache);		clear: fn(ic: self ref ImageCache);		need: fn(ic: self ref ImageCache, nbytes: int) : int;	}; 	# An connection to some host	Netconn: adt	{		id:		 int;			# for debugging		host:	string;			# host name		port:	int;			# port number		scheme: string;		# Url scheme ("http", "file", etc.)		conn:	Sys->Connection;	# fds, etc. 		sslx:	ref SSL3->Context;	# ssl connection 		vers:	int;			# ssl version		state:	int;			# NCfree, etc.		queue:	cyclic array of ref ByteSource;						# following are indexes into queue		qlen:		int;		# queue[0:qlen] is queue of requests		gocur:	int;		# go thread currently processing		ngcur:	int;		# ng threads currently processing		reqsent:	int;		# next to send request for		pipeline:	int;		# are requests being pipelined?		connected:	int;	# are we connected to host?		tstate:	int;		# for use by transport		tbuf: 	array of byte;	# for use by transport		idlestart:	int;		# timestamp when went Idle 		new: fn(id: int) : ref Netconn;		makefree: fn(nc: self ref Netconn);	}; 	# Info from an HTTP response header	Header: adt	{		code:	int;			# HC... (detailed response code)		actual:	ref Url->Parsedurl;	# actual request url (may be result of redir)		base:	ref Url->Parsedurl;	# Content-Base or request url		location:	ref Url->Parsedurl;	# Content-Location		length:	int;			# -1 if unknown		mtype:	int;			# TextHtml, etc.		chset:	string;		# charset encoding		msg:	string;			# possible message explaining status		refresh:string;			# used for server push		chal:	string;			# used if code is HSneedauth		warn:	string;			# should show this to user		lastModified:	string;		# last-modified field 		new: fn() : ref Header;		setmediatype: fn(h: self ref Header, name: string, first: array of byte);		print: fn(h: self ref Header);	}; 	# A source of raw bytes (with HTTP info)	ByteSource: adt	{		id: int;				# for debugging		req:	ref ReqInfo;		hdr:	ref Header;		# filled in from headers		data:	array of byte;		# all the data, maybe partially filled		edata: int;				# data[0:edata] is valid		err: string;			# there was an error		net:	cyclic ref Netconn;	# servicing fd, etc.		refgo: int;				# go proc is still using		refnc: int;				# netconn proc is still using 		# producer sets eof upon finalising data & edata		eof: int; 		# consumer changes only these fields:		lim: int;				# consumer has seen data[0:lim]		seenhdr: int;			# consumer has seen hdr 		free: fn(bs: self ref ByteSource);		stringsource: fn(s: string) : ref ByteSource;	}; 	# Snapshot of current system resources	ResourceState: adt	{		ms: int;		# a millisecond time stamp		main: int;		# main memory		mainlim: int;		# max main memory		heap: int;		# heap memory		heaplim: int;		# max heap memory		image: int;		# used image memory		imagelim: int;		# max image memory 		cur: fn() : ResourceState;		since: fn(rnew: self ResourceState, rold: ResourceState) : ResourceState;		print: fn(r: self ResourceState, msg: string);	};  	Nameval: adt {		key: string;		val: string; 		namevals: fn(s: string, sep: int) : list of Nameval;		find: fn(l: list of Nameval, key: string) : (int, string);	};  	# Globals	config: Config;	startres: ResourceState;	imcache: ref ImageCache;	progresschan: chan of (int, int, int, string);	gen: int;	# go generation number	ckclient: ref Cookiesrv->Client; 	init: fn(ch: Charon, me: CharonUtils, argl: list of string, evch: chan of ref E->Event, cksrv: Cookiesrv, ckclient: ref Cookiesrv->Client) : string; 	# Dispatcher functions	stringreq: fn(s : string) : ref ByteSource;	startreq: fn(req: ref ReqInfo) : ref ByteSource;	waitreq: fn(bsl : list of ref ByteSource) : ref ByteSource;	freebs: fn(bs: ref ByteSource);	abortgo: fn(gopgrp: int);	netget: fn(); 	# Miscellaneous utility functions	kill: fn(pid: int, dogroup: int);	getline: fn(fd: ref Sys->FD, buf: array of byte, bstart, bend: int) :		(array of byte, int, int, int);	saveconfig: fn() : int;	strlookup: fn(a: array of string, s: string) : int;	realloc: fn(a: array of byte, incr: int) : array of byte;	hcphrase: fn(code: int) : string;	hdraction: fn(bs: ref ByteSource, ismain: int, nredirs: int) : (int, string, string, ref Url->Parsedurl);	makestrinttab: fn(a: array of string) : array of StringIntTab->StringInt;	urlequal: fn(a, b: ref Url->Parsedurl) : int;	makeabsurl: fn(s: string) : ref Url->Parsedurl;	loadpath: fn(s: string) : string;	event: fn(s: string, data: int);	color: fn(s: string, dflt: int) : int;	max: fn(a, b : int) : int;	min: fn(a, b : int) : int;	raisex: fn(e: string);	assert: fn(i: int);	stripscript: fn(s: string) : string;	# strip HTML comments from Script	getconv: fn(chset : string) : Btos;	setcookie: fn(host, path, cookie: string);	getcookies: fn(host, path: string, secure: int): string;	schemeok: fn(scheme: string): int;	# is URL scheme supported?	X: fn(s, note : string) : string;};