BEGIN{
	oargc = 0;
	for(argc = 1; argc < ARGC; argc++){
		if(ARGV[argc] !~ /^-.+/ || ARGV[argc] ~ /--/)
			break;
		if(ARGV[argc] != "-D")
			oargv[ARGV[argc]] = oargc++;
		else
			DEBUG = 1;
		ARGV[argc] = "";
	}

	objtype = ENVIRON["objtype"];

	while(getline > 0){
		if(/^[ \t]*$/ || /^#/)
			continue;

		if(/^[^ \t]/){
			#section[$1] = 0;
			tag = $1;
		}
		if(!tag)
			continue;
		sub(/^[ \t]*/, "");
		line[tag, section[tag]++] = $0;
	}

	o = "";
	if(!oargc || ("-mkdevlist" in oargv)){
		s = mkdevlist();
		if(!("-mkdevlist" in oargv) || (oargc > 1))
			s = "DEVS=" s;
		o = o s "\n";
	}
	if((!oargc || ("-mkmach" in oargv)) && (objtype in section)){
		s = mkmach();
		if(!("-mkmach" in oargv) || (oargc > 1))
			s = "MACH=" s;
		o = o s "\n";
	}
	if((!oargc || ("-mklib" in oargv)) && ("lib" in section)){
		s = mklib();
		if(!("-mklib" in oargv) || (oargc > 1))
			s = "LIB=" s;
		o = o s "\n";
	}
	if((!oargc || ("-mkport" in oargv) ) && ("port" in section)){
		s = mkport();
		if(!("-mkport" in oargv) || (oargc > 1))
			s = "PORT=" s;
		o = o s "\n";
	}
	if("dbgflg" in section){
		for(i = 1; i < section["dbgflg"]; i++){
			n = split(line["dbgflg", i], a);
			if(n < 2 || n > 4 || a[2] !~ /'[a-zA-Z]'/)
				continue;
			if(n > 2 && a[3] !~ /'[a-zA-Z]'/)
				continue;
			if(n == 4 && (a[4] < 1 || a[4] >= 128))
				continue;
			dbgc[a[1]] = a[2];
			if(n == 4)
				dbgflg[a[3]] = a[4];
			else if(n == 3)
				dbgflg[a[3]] = 1;
		}
	}
	if((!oargc || ("-mkrules" in oargv)) && ("dir" in section)){
		o = o mkrules(".", exists, a, c, "-I.");
		for(i = 1; i < section["dir"]; i++){
			n = split(line["dir", i], a);
			dir = "../" a[1];
			if(n == 1)
				a[2] = "-I.";
			s = a[2];
			o = o mkrules(dir, exists, a, c, s);
			l = listolate(a, "|");
			if(l != ""){
				o = o "^(" l ")\\.$O:R:	" dir "/\\1.s\n";
				o = o "\t$AS $AFLAGS " s " " dir "/$stem1.s\n";
			}
			l = listolate(c, "|");
			if(l != ""){
				o = o "^(" l ")\\.$O:R:	" dir "/\\1.c\n";
				o = o "\t$CC $CFLAGS " s " " dir "/$stem1.c\n";
			}
		}
	}
	if((!oargc || ("-mkrootrules" in oargv)) && ("rootdir" in section)){
		mkrootrules(name, cname, src);
		s = ARGV[argc] ".root.s:D:";
		for(i = 1; i < section["rootdir"]; i++)
			s = s " " src[i];
		s = s "\n\t../mk/mkrootall\\\n";
		for(i = 1; i < section["rootdir"]; i++)
			s = s "\t\t" name[i] " " cname[i] " " src[i] "\\\n";
		s = s "\t>$target\n";
		if(section["rootdir"] > 1)
			o = o s;
	}
	if((!oargc || ("-mkrrrules" in oargv)) && ("rr" in section)){
		n = split(line["rr", 0], a);
		if(n == 1)
			a[2] = ARGV[argc] ".proto";
		s = "$CONF.rr:\t../mk/mkrr $CONF " a[2] "\n";
		s = s "\t../mk/mkrr $CONF " a[2] "\n";
		for(i = 1; i < section["rr"]; i++)
			s = s "$CONF.rr:\t" line["rr", i] "\n";
		o = o s;
	}
	if("-mkdevc" in oargv)
		o = o mkdevc();
	if("-mkerrstr" in oargv)
		o = o mkerrstr();
	if("-mksystab" in oargv)
		o = o mksystab();
	if("-mkbootconf" in oargv)
		o = o mkbootconf();

	#
	# to do:
	#	bootmkfile
	#	mkrootall (can it be done at all?)
	#
	printf o;

	exit 0;
}

function mkbootconf(				a, n, s, t, u, c, d, p, r){
	s = "#include <u.h>\n";
	s = s "#include <libc.h>\n\n";
	s = s "#include \"../boot/boot.h\"\n\n";
	s = s "Method method[] = {\n";

	c = "0";
	d = "#S/sdC0/";
	p = "boot";
	r = "/root";

	for(i = 0; i < section["boot"]; i++){		# NOTE: start at 0
		n = split(line["boot", i], a);
		if(a[1] == "boot"){
			if(a[2] == "cpu"){
				c = "1";
				if(n == 4 && a[3] == "boot")
					d = a[4];
			}
			else if(a[2] == "rootdir" && n == 3)
				r = a[3];
			else if(a[2] ~ /^(bboot|dosboot|romboot)$/){
				c = "1";
				p = a[2];
			}
			else if(a[2] == "boot" && n == 3)
				d = a[3];
			continue;
		}
		s = s "\t{ \"" a[1] "\", config" a[1] ", connect" a[1] ", ";
		t = "nil";
		if(n > 1){
			u = line["boot", i];
			if(sub(/^[_A-Za-z][_A-Za-z0-9]*[ \t]*/, "", u)){
				if(match(u, /^".*"$/))
					u = substr(u, RSTART+1, RLENGTH-2);
				t = "\"" u "\"";
			}
		}
		s = s t ", },\n";
	}
	s = s "\t{ nil },\n};\n\n";
	s = s "int cpuflag = " c ";\n";
	s = s "char* rootdir = \"" r "\";\n";
	s = s "char* bootdisk = \"" d "\";\n";
	s = s "extern void " p "(int, char**);\n\n";
	s = s "void\nmain(int argc, char **argv)\n";
	s = s "{\n\t" p "(argc, argv);\n}\n"

	t = "int (*cfs)(int) = 0;\n";
	for(i = 1; i < section["rootdir"]; i++){
		if($1 !~ /\/bin\/cfs$/)
			continue;
		t = "int (*cfs)(int) = cache;\n";
		break;
	}
	s = s t;

	return s;
}

function mksystab(					a, i, f, n, s, t){
	s = "#include \"u.h\"\n";
	s = s "#include \"../port/lib.h\"\n";
	s = s "#include \"mem.h\"\n";
	s = s "#include \"dat.h\"\n";
	s = s "#include \"fns.h\"\n\n";
	s = s "#include \"/sys/src/libc/9syscall/sys.h\"\n\n";

	t = "";
	while(getline < "/sys/src/libc/9syscall/sys.h"){
		if($1 != "#define" || NF != 3)
			continue;

		f = "sys" tolower($2);
		if($2 == "SYSR1")
			f = "sysr1";
		if($2 == "RENDEZVOUS")
			n = "Rendez";
		else if($2 == "BRK_")
			n = "Brk";
		else
			n = substr($2, 1, 1) tolower(substr($2, 2));

		s = s "extern void " f "(Ar0*, va_list);\n";
		t = t "\t[" $2 "]\t";
		if(length($2) < 6)
			t = t "\t";
		t = t "{ \"" n "\", " f ", ";
		#
		# The following should really be defined properly in the
		# manual and code, but changing Plan 9 now is too awkward.
		# It will matter more when sizeof(long) != sizeof(int).
		#
		# if($2 ~ "(FVERSION|STAT|FSTAT|WSTAT|FWSTAT|AWAIT)")
		#	t = t "{ .u = 0 } },\n";
		#
		# if($2 ~ "(BIND|_MOUNT|MOUNT)")
		#	t = t "{ .l = -1 } },\n";
		#
		if($2 ~ "(EXEC|SEGBRK|SEGATTACH|RENDEZVOUS)")
			t = t "{ .v = (void*)-1 } },\n";
		else if($2 ~ "(ALARM|_READ|_WRITE|PREAD|PWRITE)")
			t = t "{ .l = -1 } },\n";
		else
			t = t "{ .i = -1 } },\n";
	}
	if("syscall" in section){
		for(i = 1; i < section["syscall"]; i++){
			if(split(line["syscall", i], a) != 8)
				continue;
			if(line["syscall", i] !~ /#define.*{ \.[ilpuv] = .* }$/)
				continue;

			f = "sys" tolower(a[2]);
			n = substr(a[2], 1, 1) tolower(substr(a[2], 2));

			s = s "\nSyscall " f ";\n";
			t = t a[1] " " a[2] "\t" a[3] "\n\t[" a[2] "]\t";
			if(length(a[2]) < 6)
				t = t "\t";
			split(line["syscall", i], a, "{");
			t = t "{ \"" n "\", " f ", {" a[2] " },\n";
		}
	}
	s = s "struct {\n\tchar*\tn;\n\tvoid (*f)(Ar0*, va_list);\n\tAr0\tr;\n}";
	s = s " systab[] = {\n" t "};\n\nint nsyscall = nelem(systab);\n";

	return s;
}

function mkerrstr(					a, s){
	FS="[ \t;]+";
	while(getline < "../port/error.h"){
		split($0, a, /\/\* | \*\//);
		s = s $2 " " $3 " = \"" a[2] "\";\n";
	}
	FS=" ";

	return s;
}

function mkdevc(		a, d, i, m, n, s, t, u, name, cname){
	s = "#include \"u.h\"\n";
	s = s "#include \"../port/lib.h\"\n";
	s = s "#include \"mem.h\"\n";
	s = s "#include \"dat.h\"\n";
	s = s "#include \"fns.h\"\n";
	s = s "#include \"../port/error.h\"\n\n";
	s = s "#include \"io.h\"\n\n";

	t = "";
	for(i = 1; i < section["dev"]; i++){
		split(line["dev", i], a);
		s = s "extern Dev " a[1] "devtab;\n";
		t = t "\t&" a[1] "devtab,\n";
		d[a[1]]++;
	}
	s = s "Dev* devtab[] = {\n" t "\tnil,\n};\n\n";

	mkrootrules(name, cname, m);
	t = "";
	for(i = 1; i < section["rootdir"]; i++){
		s = s "extern uchar " cname[i] "code[];\n";
		s = s "extern usize " cname[i] "len;\n";
		t = t "\taddbootfile(\"" name[i] "\", " cname[i] "code, " cname[i] "len);\n";
	}
	for(i = 1; i < section["link"]; i++){
		split(line["link", i], a);
		s = s "extern void " a[1] "link(void);\n";
		t = t "\t" a[1] "link();\n";
	}
	s = s "void\nlinks(void)\n{\n" t "}\n\n";

	if("ip" in d && "ip" in section){
		t = "";
		s = s "#include \"../ip/ip.h\"\n";
		for(i = 1; i < section["ip"]; i++){
			split(line["ip", i], a);
			s = s "extern void " a[1] "init(Fs*);\n";
			t = t "\t" a[1] "init,\n";
		}
		s = s "void (*ipprotoinit[])(Fs*) = {\n" t "\tnil,\n};\n\n";
	}

	if("sd" in d && "sd" in section){
		t = "";
		s = s "#include \"../port/sd.h\"\n";
		for(i = 1; i < section["sd"]; i++){
			split(line["sd", i], a);
			s = s "extern SDifc " a[1] "ifc;\n";
			t = t  "\t&" a[1] "ifc,\n";
		}
		s = s "SDifc* sdifc[] = {\n" t "\tnil,\n};\n\n";
	}

	if("uart" in d && "uart" in section){
		t = "";
		for(i = 1; i < section["uart"]; i++){
			split(line["uart", i], a);
			a[1] = substr(a[1], 5, length(a[1])-4) "physuart";
			s = s "extern PhysUart " a[1] ";\n";
			t = t  "\t&" a[1] ",\n";
		}
		s = s "PhysUart* physuart[] = {\n" t "\tnil,\n};\n\n";
	}

	t = "";
	n = 0;
	if("physseg" in section){
		for(i = 1; i < section["physseg"]; i++){
			u = line["physseg", i];
			if(u ~ /^\.[_A-Za-z][_A-Za-z0-9]*/)
				t = t "\t";
			t = t "\t" u "\n";
			if(sub(/.*\.pgalloc.*=[^_A-Za-z]*/, "", u)){
				if(match(u, /^[_A-Za-z][_A-Za-z0-9]*/)){
					u = substr(u, RSTART, RLENGTH);
					s = s "extern Page *(*" u ")(Segment*, uintptr);\n";
				}
			}
			else if(sub(/.*\.pgfree.*=[^_A-Za-z]*/, "", u)){
				if(match(u, /^[_A-Za-z][_A-Za-z0-9]*/)){
					u = substr(u, RSTART, RLENGTH);
					s = s "extern void (*" u ")(Page*);\n";
				}
			}
			if(match(u, /}/))
				n++;
		}
	}
	s = s "Physseg physseg[" n+8 "] = {\n";
	s = s "\t{\t.attr\t= SG_SHARED,\n";
	s = s "\t\t.name\t= \"shared\",\n";
	s = s "\t\t.size\t= SEGMAXPG,\n\t},\n";
	s = s "\t{\t.attr\t= SG_BSS,\n";
	s = s "\t\t.name\t= \"memory\",\n";
	s = s "\t\t.size\t= SEGMAXPG,\n\t},\n";
	s = s t "};\nint nphysseg = " n+8 ";\n\n";

	s = s "char dbgflg[256]";
	t = "";
	for(u in dbgflg)
		t = t "\t[" u "]\t" dbgflg[u] ",\n";
	if(t != "")
		s = s " = {\n" t "}";
	s = s ";\n\n";

	for(i in m)
		delete m[i];

	for(i = 1; i < section["misc"]; i++){
		split(line["misc", i], a);
		m[a[1]] = line["misc", i];
	}
	if("cache" in m){
		s = s "extern void cinit(void);\n";
		s = s "extern void copen(Chan*);\n";
		s = s "extern int cread(Chan*, uchar*, int, vlong);\n";
		s = s "extern void cupdate(Chan*, uchar*, int, vlong);\n";
		s = s "extern void cwrite(Chan*, uchar*, int, vlong);\n\n";
		s = s "void (*mfcinit)(void) = cinit;\n";
		s = s "void (*mfcopen)(Chan*) = copen;\n";
		s = s "int (*mfcread)(Chan*, uchar*, int, vlong) = cread;\n";
		s = s "void (*mfcupdate)(Chan*, uchar*, int, vlong) = cupdate;\n";
		s = s "void (*mfcwrite)(Chan*, uchar*, int, vlong) = cwrite;\n\n";
	}
	else{
		s = s "void (*mfcinit)(void) = nil;\n";
		s = s "void (*mfcopen)(Chan*) = nil;\n";
		s = s "int (*mfcread)(Chan*, uchar*, int, vlong) = nil;\n";
		s = s "void (*mfcupdate)(Chan*, uchar*, int, vlong) = nil;\n";
		s = s "void (*mfcwrite)(Chan*, uchar*, int, vlong) = nil;\n\n";
	}
	if(!("rdb" in misc)){
		s = s "void\n";
		s = s "rdb(void)\n";
		s = s "{\n";
		s = s "\tsplhi();\n";
		s = s "\tiprint(\"rdb...not installed\\n\");\n";
		s = s "\tfor(;;);\n";
		s = s "}\n\n";
	}
	if(objtype == "power"){
		for(i = 1; i < section[objtype]; i++){
			split(line[objtype, i], a);
			m[a[1]] = line[objtype, i];
		}
		if(!("cnksyscall" in m)){
			s = s "void\n";
			s = s "cnksyscall(Ureg*)\n";
			s = s "{\n";
			s = s "\tpanic(\"cnkemu...not installed\\n\");\n";
			s = s "\tfor(;;);\n";
			s = s "}\n\n";
			s = s "void*\n";
			s = s "cnksysexecregs(uintptr, ulong, ulong)\n";
			s = s "{\n";
			s = s "\tpanic(\"cnkemu...not installed\\n\");\n";
			s = s "\tfor(;;);\n";
			s = s "}\n\n";
		}
	}
	if("conf" in section){
		for(i = 1; i < section["conf"]; i++)
			s = s line["conf", i] "\n";
		s = s "\n";
	}
	t = ".";
	while("pwd" | getline > 0){
		if($0 ~ /^\//)
			t = $0;
	}
	s = s "char* conffile = \"" t "/" ARGV[argc] "\";\n";
	s = s "ulong kerndate = KERNDATE;\n";

	return s;
}

function mkrootrules(name, cname, src,			a, i, n){
	for(i = 1; i < section["rootdir"]; i++){
		n = split(line["rootdir", i], a);
		if(n >= 2)
			name[i] = a[2];
		else
			name[i] = a[1];
		sub(/.*\//, "", name[i]);
		cname[i] = a[1];
		gsub(/[^a-zA-Z0-9_]/, "_", cname[i]);
		src[i] = a[1];
	}
}

function mkrules(dir, exists, ameta, cmeta, flags,		f, i, s, t){
	for(i in ameta)
		delete ameta[i];
	for(i in cmeta)
		delete cmeta[i];

	s = "";
	while("cd " dir "; /bin/ls *.[cs]" | getline > 0){
		if($0 !~ /^[A-Za-z0-9]*\.[cs]$/)
			continue;
		f = $0;
		if(!sub(/\.[cs]$/, ""))
			continue;
		if($0 in exists)
			continue;
		exists[$0] = dir;
		if(f ~ /\.c$/){
			if(!($0 in dbgc)){
				cmeta[$0]++;
				continue;
			}
			t = "$CC $CFLAGS " flags;
		}
		else{
			if(!($0 in dbgc)){
				ameta[$0]++;
				continue;
			}
			t = "$AS $AFLAGS " flags;
		}
		s = s $0 ".$O:\t" dir "/" f "\n";
		s = s "\t" t " -D'_DBGC_='" dbgc[$0] "'' " dir "/" f "\n";
	}
	return s;
}

function mkport(					array){
	arrayify(array, "port", "", ".$O", 1);

	return listolate(array, " ");
}

function mklib(						array){
	arrayify(array, "lib", "/$objtype/lib/", ".a", 1);

	return listolate(array," ");
}

function mkmach(					a, i, s){
	s = "";
	for(i = 1; i < section[objtype]; i++){
		if(!split(line[objtype, i], a))
			continue;
		if(s == "")
			s = a[1] ".$O";
		else
			s = s " " a[1] ".$O";
	}

	return s;
}

function mkdevlist(					a, array, i, j, n, s){
	for(s in section){
		if(line[s, 0] !~ /[ \t]\+dev[^_A-Za-z0-9]*/)
			continue;
		if(s == "dev")
			arrayify(array, s, "dev", ".$O", 1);
		else if(s == objtype)
			arrayify(array, s, "", ".$O", 0);
		else
			arrayify(array, s, "", ".$O", 1);
	}

	return listolate(array, " ");
}

function listolate(array, sep,				a, s){
	s = "";
	for(a in array){
		if(s == "")
			s = a;
		else
			s = a sep s;
	}

	return s;
}

function arrayify(array, tag, prefix, suffix, one,	a, i, j, n){
	for(i = 1; i < section[tag]; i++){
		n = split(line[tag, i], a);
		if(one)
			array[prefix a[1] suffix]++;
		for(j = 2; j <= n; j++){
			if(a[$j] ~ /[+=-].*/)
				continue;
			array[a[j] suffix]++;
		}
	}
}