Bump version, update NEWS

Additional lines might have been passed to the server intact
as part of an argument, but we have /quote for that.

CMakeLists.txt

@@ -1,6 +1,11 @@
 # Ubuntu 18.04 LTS and OpenBSD 6.4
 cmake_minimum_required (VERSION 3.10)
-project (xK VERSION 1.5.0
+
+file (READ xK-version project_version)
+configure_file (xK-version xK-version.tag COPYONLY)
+string (STRIP "${project_version}" project_version)
+
+project (xK VERSION "${project_version}"
 	DESCRIPTION "IRC daemon, bot, TUI client and its web frontend" LANGUAGES C)
 
 # Options
@@ -18,9 +23,6 @@ if ("${CMAKE_C_COMPILER_ID}" MATCHES "GNU" OR CMAKE_COMPILER_IS_GNUCC)
 	set (CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wall -Wextra -Wno-unused-function")
 endif ()
 
-# Version
-set (project_version "${PROJECT_VERSION}")
-
 # Try to append commit ID if it follows a version tag.  It might be nicer if
 # we could also detect dirty worktrees but that's very hard to get right.
 # If we didn't need this for CPack, we could use add_custom_command to generate
@@ -162,14 +164,15 @@ add_custom_target (replies DEPENDS ${PROJECT_BINARY_DIR}/xD-replies.c)
 
 add_custom_command (OUTPUT xC-proto.c
 	COMMAND env LC_ALL=C awk
-		-f ${PROJECT_SOURCE_DIR}/xC-gen-proto.awk
-		-f ${PROJECT_SOURCE_DIR}/xC-gen-proto-c.awk
-		${PROJECT_SOURCE_DIR}/xC-proto > xC-proto.c
+		-f ${PROJECT_SOURCE_DIR}/liberty/tools/lxdrgen.awk
+		-f ${PROJECT_SOURCE_DIR}/liberty/tools/lxdrgen-c.awk
+		-v PrefixCamel=Relay
+		${PROJECT_SOURCE_DIR}/xC.lxdr > xC-proto.c
 	DEPENDS
-		${PROJECT_SOURCE_DIR}/xC-gen-proto.awk
-		${PROJECT_SOURCE_DIR}/xC-gen-proto-c.awk
-		${PROJECT_SOURCE_DIR}/xC-proto
-	COMMENT "Generating xC relay protocol code")
+		${PROJECT_SOURCE_DIR}/liberty/tools/lxdrgen.awk
+		${PROJECT_SOURCE_DIR}/liberty/tools/lxdrgen-c.awk
+		${PROJECT_SOURCE_DIR}/xC.lxdr
+	COMMENT "Generating xC relay protocol code" VERBATIM)
 add_custom_target (xC-proto DEPENDS ${PROJECT_BINARY_DIR}/xC-proto.c)
 
 # Build
@@ -260,8 +263,9 @@ foreach (page xB xC xD)
 	else ()
 		set (ASCIIMAN ${PROJECT_SOURCE_DIR}/liberty/tools/asciiman.awk)
 		add_custom_command (OUTPUT ${page_output}
-			COMMAND env LC_ALL=C awk -f ${ASCIIMAN}
-				"${PROJECT_SOURCE_DIR}/${page}.adoc" > ${page_output}
+			COMMAND env LC_ALL=C asciidoc-release-version=${project_version}
+				awk -f ${ASCIIMAN} "${PROJECT_SOURCE_DIR}/${page}.adoc"
+				> ${page_output}
 			DEPENDS ${page}.adoc ${ASCIIMAN}
 			COMMENT "Generating man page for ${page}" VERBATIM)
 	endif ()

LICENSE

@@ -1,4 +1,4 @@
-Copyright (c) 2014 - 2022, Přemysl Eric Janouch <p@janouch.name>
+Copyright (c) 2014 - 2024, Přemysl Eric Janouch <p@janouch.name>
 
 Permission to use, copy, modify, and/or distribute this software for any
 purpose with or without fee is hereby granted.

NEWS

@@ -1,4 +1,6 @@
-2.0.0 (Unreleased)
+2.0.0 (2024-07-28) "Perfect Is the Enemy of Good"
+
+ * xD: now using SHA-256 for client certificate fingerprints
 
  * xD: implemented WALLOPS, choosing to make it target even non-operators
 
@@ -14,6 +16,8 @@
 
  * xC: replaced behaviour.save_on_quit with general.autosave
 
+ * xC: the server *.command configuration option now supports multiple lines
+
  * xC: improved pager integration capabilities
 
  * xC: unsolicited JOINs will no longer automatically activate the buffer
@@ -29,6 +33,14 @@
 
  * Added a web frontend for xC called xP
 
+ * Added a Win32 frontend for xC called xW
+
+ * Added a Cocoa frontend for xC called xM
+
+ * Added a Go port of xD called xS
+
+ * Added a simple notifier called xN
+
 
 1.5.0 (2021-12-21) "The Show Must Go On"
 

README.adoc

@@ -1,9 +1,10 @@
 xK
 ==
 
-'xK' (chat kit) is an IRC software suite consisting of a daemon, bot, terminal
-client, and a web frontend for the client.  It's all you're ever going to
-need for chatting, so long as you can make do with slightly minimalist software.
+'xK' (chat kit) is an IRC software suite consisting of a daemon, bot, notifier,
+terminal client, and web/Windows/macOS frontends for the client.  It's all
+you're ever going to need for chatting, so long as you can make do with slightly
+minimalist software.
 
 They're all lean on dependencies, and offer a maximally permissive licence.
 
@@ -47,8 +48,17 @@ What it notably doesn't support is online changes to configuration, any limits
 besides the total number of connections and mode `+l`, or server linking
 (which also means no services).
 
-This program has been https://git.janouch.name/p/haven/src/branch/master/hid[
-ported to Go] in a different project, and development continues over there.
+xS
+--
+The IRC daemon again, this time ported to Go, additionally supporting WEBIRC,
+and thus ideal for pairing with, e.g.,
+https://github.com/kiwiirc/webircgateway[].
+Any further development, such as P10 or TS6 linking for IRC services,
+or plugin support for arbitrary bridges, will happen here.
+
+xN
+--
+The IRC notifier, should you ever need to send automated messages from a script.
 
 xB
 --
@@ -63,8 +73,10 @@ that easily to any program).
 
 Packages
 --------
-Regular releases are sporadic.  git master should be stable enough.  You can get
-a package with the latest development version from Archlinux's AUR.
+Regular releases are sporadic.  git master should be stable enough.
+You can get a package with the latest development version using Arch Linux's
+https://aur.archlinux.org/packages/xk-git[AUR],
+or as a https://git.janouch.name/p/nixexprs[Nix derivation].
 
 Building
 --------
@@ -130,16 +142,37 @@ For remote use, it's recommended to put 'xP' behind a reverse proxy, with TLS,
 and some form of HTTP authentication.  Pass the external URL of the WebSocket
 endpoint as the third command line argument in this case.
 
+xW
+~~
+The Win32 frontend is a separate CMake subproject that should be compiled
+using MinGW-w64.  To avoid having to specify the relay address each time you
+run it, create a shortcut for the executable and include the address in its
+_Target_ field:
+
+ C:\...\xW.exe 127.0.0.1 9000
+
+It works reasonably well starting with Windows 7.
+
+xM
+~~
+The Cocoa frontend is a separate CMake subproject that requires Xcode to build.
+It is currently not that usable.  The relay address can either be passed on
+the command line, or preset in the _defaults_ database:
+
+ $ defaults write name.janouch.xM relayHost 127.0.0.1
+ $ defaults write name.janouch.xM relayPort 9000
+
 Client Certificates
 -------------------
 'xC' will use the SASL EXTERNAL method to authenticate using the TLS client
 certificate specified by the respective server's `tls_cert` option if you add
 `sasl` to the `capabilities` option and the server supports this.
 
-'xD' uses SHA-1 fingerprints of TLS client certificates to authenticate users.
-To get the fingerprint from a certificate file in the required form, use:
+'xD' and 'xS' use SHA-256 fingerprints of TLS client certificates
+to authenticate users.  To get the fingerprint from a certificate file
+in the required form, use:
 
- $ openssl x509 -in public.pem -outform DER | sha1sum
+ $ openssl x509 -in public.pem -outform DER | sha256sum
 
 Custom Key Bindings in xC
 -------------------------

test

@@ -1,5 +1,7 @@
 #!/usr/bin/expect -f
 # Very basic end-to-end testing for CI
+set tempdir [exec mktemp -d]
+set ::env(XDG_CONFIG_HOME) $tempdir
 
 # Run the daemon to test against
 system ./xD --write-default-cfg
@@ -27,7 +29,7 @@ expect "Option changed"
 send "/disconnect\n"
 expect "]"
 send "/connect\n"
-expect "Connection established"
+expect "Welcome to"
 
 # Try some chatting
 send "/join #test\n"

test-static

@@ -1,8 +1,16 @@
 #!/bin/sh
 # We don't use printf's percent notation with our custom logging mechanism,
-# so the compiler cannot check it for us like it usually does
+# so the compiler cannot check it for us like it usually does.
+#
+# In clang-query terms, the string we're interested in can be found through:
+#   set traversal IgnoreUnlessSpelledInSource
+#   set output dump
+#   match callExpr(callee(functionDecl(
+#     hasName("log_full"))),
+#     hasArgument(5, stringLiteral().bind("format")))
+# However, the tool is too restricted to be useful in a shell script.
 perl -n0777 - "$(dirname "$0")"/xC.c <<-'END'
-	while (/\blog_[^ ]+\s*\([^"()]*"[^"]*%[^%][^"]*"/gm) {
+	while (/\blog_[^ ]+\s*\([^"()]*"[^"]*%\w[^"]*"/gm) {
 		my ($p, $m) = ($`, $&);
 		printf "$ARGV:%d: suspicious log format string: %s...\n",
 			(1 + $p =~ tr/\n//), ($m =~ s/\s+/ /rg);

xB.c

@@ -1009,7 +1009,7 @@ is_valid_plugin_name (const char *name)
 	if (!*name)
 		return false;
 	for (const char *p = name; *p; p++)
-		if (!isgraph (*p) || *p == '/')
+		if (!isgraph ((uint8_t) *p) || *p == '/')
 			return false;
 	return true;
 }
@@ -1213,7 +1213,7 @@ parse_bot_command (const char *s, const char *command, const char **following)
 	s += command_len;
 
 	// Expect a word boundary, so that we don't respond to invalid things
-	if (isalnum (*s))
+	if (isalnum ((uint8_t) *s))
 		return false;
 
 	// Ignore any initial spaces; the rest is the command's argument

xC-gen-proto-c.awk

@@ -1,325 +0,0 @@
-# xC-gen-proto-c.awk: C backend for xC-gen-proto.awk.
-#
-# Copyright (c) 2022, Přemysl Eric Janouch <p@janouch.name>
-# SPDX-License-Identifier: 0BSD
-#
-# Neither *_new() nor *_destroy() functions are provided, because they'd only
-# be useful for top-levels, and are merely extra malloc()/free() calls.
-# Users are expected to reuse buffers.
-#
-# Similarly, no constructors are produced--those are easy to write manually.
-#
-# All arrays are deserialized zero-terminated, so u8<> and i8<> can be directly
-# used as C strings.
-#
-# All types must be able to dispose partially zero values going from the back,
-# i.e., in the reverse order of deserialization.
-
-function define_internal(name, ctype) {
-	Types[name] = "internal"
-	CodegenCType[name] = ctype
-}
-
-function define_int(shortname, ctype) {
-	define_internal(shortname, ctype)
-	CodegenSerialize[shortname] = \
-		"\tstr_pack_" shortname "(w, %s);\n"
-	CodegenDeserialize[shortname] = \
-		"\tif (!msg_unpacker_" shortname "(r, &%s))\n" \
-		"\t\treturn false;\n"
-}
-
-function define_sint(size) { define_int("i" size, "int" size "_t") }
-function define_uint(size) { define_int("u" size, "uint" size "_t") }
-
-function codegen_begin() {
-	define_sint("8")
-	define_sint("16")
-	define_sint("32")
-	define_sint("64")
-	define_uint("8")
-	define_uint("16")
-	define_uint("32")
-	define_uint("64")
-
-	define_internal("string", "struct str")
-	CodegenDispose["string"] = "\tstr_free(&%s);\n"
-	CodegenSerialize["string"] = \
-		"\tif (!proto_string_serialize(&%s, w))\n" \
-		"\t\treturn false;\n"
-	CodegenDeserialize["string"] = \
-		"\tif (!proto_string_deserialize(&%s, r))\n" \
-		"\t\treturn false;\n"
-
-	define_internal("bool", "bool")
-	CodegenSerialize["bool"] = \
-		"\tstr_pack_u8(w, !!%s);\n"
-	CodegenDeserialize["bool"] = \
-		"\t{\n" \
-		"\t\tuint8_t v = 0;\n" \
-		"\t\tif (!msg_unpacker_u8(r, &v))\n" \
-		"\t\t\treturn false;\n" \
-		"\t\t%s = !!v;\n" \
-		"\t}\n"
-
-	print "// This file directly depends on liberty.c, but doesn't include it."
-
-	print ""
-	print "static bool"
-	print "proto_string_serialize(const struct str *s, struct str *w) {"
-	print "\tif (s->len > UINT32_MAX)"
-	print "\t\treturn false;"
-	print "\tstr_pack_u32(w, s->len);"
-	print "\tstr_append_str(w, s);"
-	print "\treturn true;"
-	print "}"
-
-	print ""
-	print "static bool"
-	print "proto_string_deserialize(struct str *s, struct msg_unpacker *r) {"
-	print "\tuint32_t len = 0;"
-	print "\tif (!msg_unpacker_u32(r, &len))"
-	print "\t\treturn false;"
-	print "\tif (msg_unpacker_get_available(r) < len)"
-	print "\t\treturn false;"
-	print "\t*s = str_make();"
-	print "\tstr_append_data(s, r->data + r->offset, len);"
-	print "\tr->offset += len;"
-	print "\tif (!utf8_validate (s->str, s->len))"
-	print "\t\treturn false;"
-	print "\treturn true;"
-	print "}"
-}
-
-function codegen_constant(name, value) {
-	print ""
-	print "enum { " PrefixUpper name " = " value " };"
-}
-
-function codegen_enum_value(name, subname, value, cg) {
-	append(cg, "fields",
-		"\t" PrefixUpper toupper(cameltosnake(name)) "_" subname \
-		" = " value ",\n")
-}
-
-function codegen_enum(name, cg,    ctype) {
-	ctype = "enum " PrefixLower cameltosnake(name)
-	print ""
-	print ctype " {"
-	print cg["fields"] "};"
-
-	# XXX: This should also check if it isn't out-of-range for any reason,
-	# but our usage of sprintf() stands in the way a bit.
-	CodegenSerialize[name] = "\tstr_pack_i8(w, %s);\n"
-	CodegenDeserialize[name] = \
-		"\t{\n" \
-		"\t\tint8_t v = 0;\n" \
-		"\t\tif (!msg_unpacker_i8(r, &v) || !v)\n" \
-		"\t\t\treturn false;\n" \
-		"\t\t%s = v;\n" \
-		"\t}\n"
-
-	CodegenCType[name] = ctype
-	for (i in cg)
-		delete cg[i]
-}
-
-function codegen_struct_tag(d, cg,    f) {
-	f = "self->" d["name"]
-	append(cg, "fields", "\t" CodegenCType[d["type"]] " " d["name"] ";\n")
-	append(cg, "dispose", sprintf(CodegenDispose[d["type"]], f))
-	append(cg, "serialize", sprintf(CodegenSerialize[d["type"]], f))
-	# Do not deserialize here, that would be out of order.
-}
-
-function codegen_struct_field(d, cg,    f, dispose, serialize, deserialize) {
-	f = "self->" d["name"]
-	dispose = CodegenDispose[d["type"]]
-	serialize = CodegenSerialize[d["type"]]
-	deserialize = CodegenDeserialize[d["type"]]
-	if (!d["isarray"]) {
-		append(cg, "fields", "\t" CodegenCType[d["type"]] " " d["name"] ";\n")
-		append(cg, "dispose", sprintf(dispose, f))
-		append(cg, "serialize", sprintf(serialize, f))
-		append(cg, "deserialize", sprintf(deserialize, f))
-		return
-	}
-
-	append(cg, "fields",
-		"\t" CodegenCType["u32"] " " d["name"] "_len;\n" \
-		"\t" CodegenCType[d["type"]] " *" d["name"] ";\n")
-
-	if (dispose)
-		append(cg, "dispose", "\tif (" f ")\n" \
-			"\t\tfor (size_t i = 0; i < " f "_len; i++)\n" \
-			indent(indent(sprintf(dispose, f "[i]"))))
-	append(cg, "dispose", "\tfree(" f ");\n")
-
-	append(cg, "serialize", sprintf(CodegenSerialize["u32"], f "_len"))
-	if (d["type"] == "u8" || d["type"] == "i8") {
-		append(cg, "serialize",
-			"\tstr_append_data(w, " f ", " f "_len);\n")
-	} else if (serialize) {
-		append(cg, "serialize",
-			"\tfor (size_t i = 0; i < " f "_len; i++)\n" \
-			indent(sprintf(serialize, f "[i]")))
-	}
-
-	append(cg, "deserialize", sprintf(CodegenDeserialize["u32"], f "_len") \
-		"\tif (!(" f " = calloc(" f "_len + 1, sizeof *" f ")))\n" \
-		"\t\treturn false;\n")
-	if (d["type"] == "u8" || d["type"] == "i8") {
-		append(cg, "deserialize",
-			"\tif (msg_unpacker_get_available(r) < " f "_len)\n" \
-			"\t\treturn false;\n" \
-			"\tmemcpy(" f ", r->data + r->offset, " f "_len);\n" \
-			"\tr->offset += " f "_len;\n")
-	} else if (deserialize) {
-		append(cg, "deserialize",
-			"\tfor (size_t i = 0; i < " f "_len; i++)\n" \
-			indent(sprintf(deserialize, f "[i]")))
-	}
-}
-
-function codegen_struct(name, cg,    ctype, funcname) {
-	ctype = "struct " PrefixLower cameltosnake(name)
-	print ""
-	print ctype " {"
-	print cg["fields"] "};"
-
-	if (cg["dispose"]) {
-		funcname = PrefixLower cameltosnake(name) "_free"
-		print ""
-		print "static void\n" funcname "(" ctype " *self) {"
-		print cg["dispose"] "}"
-
-		CodegenDispose[name] = "\t" funcname "(&%s);\n"
-	}
-	if (cg["serialize"]) {
-		funcname = PrefixLower cameltosnake(name) "_serialize"
-		print ""
-		print "static bool\n" \
-			  funcname "(\n\t\t" ctype " *self, struct str *w) {"
-		print cg["serialize"] "\treturn true;"
-		print "}"
-
-		CodegenSerialize[name] = "\tif (!" funcname "(&%s, w))\n" \
-			"\t\treturn false;\n"
-	}
-	if (cg["deserialize"]) {
-		funcname = PrefixLower cameltosnake(name) "_deserialize"
-		print ""
-		print "static bool\n" \
-			  funcname "(\n\t\t" ctype " *self, struct msg_unpacker *r) {"
-		print cg["deserialize"] "\treturn true;"
-		print "}"
-
-		CodegenDeserialize[name] = "\tif (!" funcname "(&%s, r))\n" \
-			"\t\treturn false;\n"
-	}
-
-	CodegenCType[name] = ctype
-	for (i in cg)
-		delete cg[i]
-}
-
-function codegen_union_tag(d, cg) {
-	cg["tagtype"] = d["type"]
-	cg["tagname"] = d["name"]
-	append(cg, "fields", "\t" CodegenCType[d["type"]] " " d["name"] ";\n")
-}
-
-function codegen_union_struct( \
-		name, casename, cg, scg,     structname, fieldname, fullcasename) {
-	# Don't generate obviously useless structs.
-	fullcasename = toupper(cameltosnake(cg["tagtype"])) "_" casename
-	if (!scg["dispose"] && !scg["deserialize"]) {
-		append(cg, "structless", "\tcase " PrefixUpper fullcasename ":\n")
-		for (i in scg)
-			delete scg[i]
-		return
-	}
-
-	# And thus not all generated structs are present in Types.
-	structname = name "_" casename
-	fieldname = tolower(casename)
-	codegen_struct(structname, scg)
-
-	append(cg, "fields", "\t" CodegenCType[structname] " " fieldname ";\n")
-	if (CodegenDispose[structname])
-		append(cg, "dispose", "\tcase " PrefixUpper fullcasename ":\n" \
-			indent(sprintf(CodegenDispose[structname], "self->" fieldname)) \
-			"\t\tbreak;\n")
-
-	# With no de/serialization code, this will simply recognize the tag.
-	append(cg, "serialize", "\tcase " PrefixUpper fullcasename ":\n" \
-		indent(sprintf(CodegenSerialize[structname], "self->" fieldname)) \
-		"\t\tbreak;\n")
-	append(cg, "deserialize", "\tcase " PrefixUpper fullcasename ":\n" \
-		indent(sprintf(CodegenDeserialize[structname], "self->" fieldname)) \
-		"\t\tbreak;\n")
-}
-
-function codegen_union(name, cg,    f, ctype, funcname) {
-	ctype = "union " PrefixLower cameltosnake(name)
-	print ""
-	print ctype " {"
-	print cg["fields"] "};"
-
-	f = "self->" cg["tagname"]
-	if (cg["dispose"]) {
-		funcname = PrefixLower cameltosnake(name) "_free"
-		print ""
-		print "static void\n" funcname "(" ctype " *self) {"
-		print "\tswitch (" f ") {"
-		if (cg["structless"])
-			print cg["structless"] \
-				indent(sprintf(CodegenDispose[cg["tagtype"]], f)) "\t\tbreak;"
-		print cg["dispose"] "\tdefault:"
-		print "\t\tbreak;"
-		print "\t}"
-		print "}"
-
-		CodegenDispose[name] = "\t" funcname "(&%s);\n"
-	}
-	if (cg["serialize"]) {
-		funcname = PrefixLower cameltosnake(name) "_serialize"
-		print ""
-		print "static bool\n" \
-			  funcname "(\n\t\t" ctype " *self, struct str *w) {"
-		print "\tswitch (" f ") {"
-		if (cg["structless"])
-			print cg["structless"] \
-				indent(sprintf(CodegenSerialize[cg["tagtype"]], f)) "\t\tbreak;"
-		print cg["serialize"] "\tdefault:"
-		print "\t\treturn false;"
-		print "\t}"
-		print "\treturn true;"
-		print "}"
-
-		CodegenSerialize[name] = "\tif (!" funcname "(&%s, w))\n" \
-			"\t\treturn false;\n"
-	}
-	if (cg["deserialize"]) {
-		funcname = PrefixLower cameltosnake(name) "_deserialize"
-		print ""
-		print "static bool\n" \
-			  funcname "(\n\t\t" ctype " *self, struct msg_unpacker *r) {"
-		print sprintf(CodegenDeserialize[cg["tagtype"]], f)
-		print "\tswitch (" f ") {"
-		if (cg["structless"])
-			print cg["structless"] "\t\tbreak;"
-		print cg["deserialize"] "\tdefault:"
-		print "\t\treturn false;"
-		print "\t}"
-		print "\treturn true;"
-		print "}"
-
-		CodegenDeserialize[name] = "\tif (!" funcname "(&%s, r))\n" \
-			"\t\treturn false;\n"
-	}
-
-	CodegenCType[name] = ctype
-	for (i in cg)
-		delete cg[i]
-}

xC-gen-proto-go.awk

@@ -1,519 +0,0 @@
-# xC-gen-proto-go.awk: Go backend for xC-gen-proto.awk.
-#
-# Copyright (c) 2022, Přemysl Eric Janouch <p@janouch.name>
-# SPDX-License-Identifier: 0BSD
-#
-# This backend also enables proxying to other endpoints using JSON.
-
-function define_internal(name, gotype) {
-	Types[name] = "internal"
-	CodegenGoType[name] = gotype
-}
-
-function define_sint(size,    shortname, gotype) {
-	shortname = "i" size
-	gotype = "int" size
-	define_internal(shortname, gotype)
-
-	CodegenAppendJSON[shortname] = \
-		"\tb = strconv.AppendInt(b, int64(%s), 10)\n"
-	if (size == 8) {
-		CodegenSerialize[shortname] = "\tdata = append(data, uint8(%s))\n"
-		CodegenDeserialize[shortname] = \
-			"\tif len(data) >= 1 {\n" \
-			"\t\t%s, data = int8(data[0]), data[1:]\n" \
-			"\t} else {\n" \
-			"\t\treturn nil, false\n" \
-			"\t}\n"
-		return
-	}
-
-	CodegenSerialize[shortname] = \
-		"\tdata = binary.BigEndian.AppendUint" size "(data, uint" size "(%s))\n"
-	CodegenDeserialize[shortname] = \
-		"\tif len(data) >= " (size / 8) " {\n" \
-		"\t\t%s = " gotype "(binary.BigEndian.Uint" size "(data))\n" \
-		"\t\tdata = data[" (size / 8) ":]\n" \
-		"\t} else {\n" \
-		"\t\treturn nil, false\n" \
-		"\t}\n"
-}
-
-function define_uint(size,    shortname, gotype) {
-	# Both []byte and []uint8 luckily marshal as base64-encoded JSON strings,
-	# so there's no need to rename the type as an exception.
-	shortname = "u" size
-	gotype = "uint" size
-	define_internal(shortname, gotype)
-
-	CodegenAppendJSON[shortname] = \
-		"\tb = strconv.AppendUint(b, uint64(%s), 10)\n"
-	if (size == 8) {
-		CodegenSerialize[shortname] = "\tdata = append(data, %s)\n"
-		CodegenDeserialize[shortname] = \
-			"\tif len(data) >= 1 {\n" \
-			"\t\t%s, data = data[0], data[1:]\n" \
-			"\t} else {\n" \
-			"\t\treturn nil, false\n" \
-			"\t}\n"
-		return
-	}
-
-	CodegenSerialize[shortname] = \
-		"\tdata = binary.BigEndian.AppendUint" size "(data, %s)\n"
-	CodegenDeserialize[shortname] = \
-		"\tif len(data) >= " (size / 8) " {\n" \
-		"\t\t%s = binary.BigEndian.Uint" size "(data)\n" \
-		"\t\tdata = data[" (size / 8) ":]\n" \
-		"\t} else {\n" \
-		"\t\treturn nil, false\n" \
-		"\t}\n"
-}
-
-function codegen_begin() {
-	define_sint("8")
-	define_sint("16")
-	define_sint("32")
-	define_sint("64")
-	define_uint("8")
-	define_uint("16")
-	define_uint("32")
-	define_uint("64")
-
-	define_internal("bool", "bool")
-	CodegenAppendJSON["bool"] = \
-		"\tb = strconv.AppendBool(b, %s)\n"
-	CodegenSerialize["bool"] = \
-		"\tif %s {\n" \
-		"\t\tdata = append(data, 1)\n" \
-		"\t} else {\n" \
-		"\t\tdata = append(data, 0)\n" \
-		"\t}\n"
-	CodegenDeserialize["bool"] = \
-		"\tif data, ok = protoConsumeBoolFrom(data, &%s); !ok {\n" \
-		"\t\treturn nil, ok\n" \
-		"\t}\n"
-
-	define_internal("string", "string")
-	CodegenSerialize["string"] = \
-		"\tif data, ok = protoAppendStringTo(data, %s); !ok {\n" \
-		"\t\treturn nil, ok\n" \
-		"\t}\n"
-	CodegenDeserialize["string"] = \
-		"\tif data, ok = protoConsumeStringFrom(data, &%s); !ok {\n" \
-		"\t\treturn nil, ok\n" \
-		"\t}\n"
-
-	print "package main"
-	print ""
-	print "import ("
-	print "\t`encoding/base64`"
-	print "\t`encoding/binary`"
-	print "\t`encoding/json`"
-	print "\t`errors`"
-	print "\t`math`"
-	print "\t`strconv`"
-	print "\t`unicode/utf8`"
-	print ")"
-	print ""
-
-	print "// protoConsumeBoolFrom tries to deserialize a boolean value"
-	print "// from the beginning of a byte stream. When successful,"
-	print "// it returns a subslice with any data that might follow."
-	print "func protoConsumeBoolFrom(data []byte, b *bool) ([]byte, bool) {"
-	print "\tif len(data) < 1 {"
-	print "\t\treturn nil, false"
-	print "\t}"
-	print "\tif data[0] != 0 {"
-	print "\t\t*b = true"
-	print "\t} else {"
-	print "\t\t*b = false"
-	print "\t}"
-	print "\treturn data[1:], true"
-	print "}"
-	print ""
-
-	print "// protoAppendStringTo tries to serialize a string value,"
-	print "// appending it to the end of a byte stream."
-	print "func protoAppendStringTo(data []byte, s string) ([]byte, bool) {"
-	print "\tif len(s) > math.MaxUint32 {"
-	print "\t\treturn nil, false"
-	print "\t}"
-	print "\tdata = binary.BigEndian.AppendUint32(data, uint32(len(s)))"
-	print "\treturn append(data, s...), true"
-	print "}"
-	print ""
-
-	print "// protoConsumeStringFrom tries to deserialize a string value"
-	print "// from the beginning of a byte stream. When successful,"
-	print "// it returns a subslice with any data that might follow."
-	print "func protoConsumeStringFrom(data []byte, s *string) ([]byte, bool) {"
-	print "\tif len(data) < 4 {"
-	print "\t\treturn nil, false"
-	print "\t}"
-	print "\tlength := binary.BigEndian.Uint32(data)"
-	print "\tif data = data[4:]; uint64(len(data)) < uint64(length) {"
-	print "\t\treturn nil, false"
-	print "\t}"
-	print "\t*s = string(data[:length])"
-	print "\tif !utf8.ValidString(*s) {"
-	print "\t\treturn nil, false"
-	print "\t}"
-	print "\treturn data[length:], true"
-	print "}"
-	print ""
-
-	print "// protoUnmarshalEnumJSON converts a JSON fragment to an integer,"
-	print "// ensuring that it's within the expected range of enum values."
-	print "func protoUnmarshalEnumJSON(data []byte) (int64, error) {"
-	print "\tvar n int64"
-	print "\tif err := json.Unmarshal(data, &n); err != nil {"
-	print "\t\treturn 0, err"
-	print "\t} else if n > math.MaxInt8 || n < math.MinInt8 {"
-	print "\t\treturn 0, errors.New(`integer out of range`)"
-	print "\t} else {"
-	print "\t\treturn n, nil"
-	print "\t}"
-	print "}"
-	print ""
-}
-
-function codegen_constant(name, value) {
-	print "const " PrefixCamel snaketocamel(name) " = " value
-	print ""
-}
-
-function codegen_enum_value(name, subname, value, cg,    goname) {
-	goname = PrefixCamel name snaketocamel(subname)
-	append(cg, "fields",
-		"\t" goname " = " value "\n")
-	append(cg, "stringer",
-		"\tcase " goname ":\n" \
-		"\t\treturn `" snaketocamel(subname) "`\n")
-	append(cg, "marshal",
-		goname ",\n")
-	append(cg, "unmarshal",
-		"\tcase `" snaketocamel(subname) "`:\n" \
-		"\t\t*v = " goname "\n")
-}
-
-function codegen_enum(name, cg,    gotype, fields) {
-	gotype = PrefixCamel name
-	print "type " gotype " int8"
-	print ""
-
-	print "const ("
-	print cg["fields"] ")"
-	print ""
-
-	print "func (v " gotype ") String() string {"
-	print "\tswitch v {"
-	print cg["stringer"] "\tdefault:"
-	print "\t\treturn strconv.Itoa(int(v))"
-	print "\t}"
-	print "}"
-	print ""
-
-	CodegenIsMarshaler[name] = 1
-	fields = cg["marshal"]
-	sub(/,\n$/, ":", fields)
-	gsub(/\n/, "\n\t", fields)
-	print "func (v " gotype ") MarshalJSON() ([]byte, error) {"
-	print "\tswitch v {"
-	print indent("case " fields)
-	print "\t\treturn []byte(`\"` + v.String() + `\"`), nil"
-	print "\t}"
-	print "\treturn json.Marshal(int(v))"
-	print "}"
-	print ""
-
-	print "func (v *" gotype ") UnmarshalJSON(data []byte) error {"
-	print "\tvar s string"
-	print "\tif json.Unmarshal(data, &s) == nil {"
-	print "\t\t// Handled below."
-	print "\t} else if n, err := protoUnmarshalEnumJSON(data); err != nil {"
-	print "\t\treturn err"
-	print "\t} else {"
-	print "\t\t*v = " gotype "(n)"
-	print "\t\treturn nil"
-	print "\t}"
-	print ""
-	print "\tswitch s {"
-	print cg["unmarshal"] "\tdefault:"
-	print "\t\treturn errors.New(`unrecognized value: ` + s)"
-	print "\t}"
-	print "\treturn nil"
-	print "}"
-	print ""
-
-	# XXX: This should also check if it isn't out-of-range for any reason,
-	# but our usage of sprintf() stands in the way a bit.
-	CodegenSerialize[name] = "\tdata = append(data, uint8(%s))\n"
-	CodegenDeserialize[name] = \
-		"\tif len(data) >= 1 {\n" \
-		"\t\t%s, data = " gotype "(data[0]), data[1:]\n" \
-		"\t} else {\n" \
-		"\t\treturn nil, false\n" \
-		"\t}\n"
-
-	CodegenGoType[name] = gotype
-	for (i in cg)
-		delete cg[i]
-}
-
-function codegen_marshal(type, f,    marshal) {
-	if (CodegenAppendJSON[type])
-		return sprintf(CodegenAppendJSON[type], f)
-
-	# Complex types are json.Marshalers, there's no need to json.Marshal(&f).
-	if (CodegenIsMarshaler[type])
-		marshal = f ".MarshalJSON()"
-	else
-		marshal = "json.Marshal(" f ")"
-
-	return \
-		"\tif j, err := " marshal "; err != nil {\n" \
-		"\t\treturn nil, err\n" \
-		"\t} else {\n" \
-		"\t\tb = append(b, j...)\n" \
-		"\t}\n"
-}
-
-function codegen_struct_field_marshal(d, cg,    camel, f, marshal) {
-	camel = snaketocamel(d["name"])
-	f = "s." camel
-	if (!d["isarray"]) {
-		append(cg, "marshal",
-			"\tb = append(b, `,\"" decapitalize(camel) "\":`...)\n" \
-			codegen_marshal(d["type"], f))
-		return
-	}
-
-	# Note that we do not produce `null` for nil slices, unlike encoding/json.
-	# And arrays never get deserialized as such.
-	if (d["type"] == "u8") {
-		append(cg, "marshal",
-			"\tb = append(b, `,\"" decapitalize(camel) "\":\"`...)\n" \
-			"\tb = append(b, base64.StdEncoding.EncodeToString(" f ")...)\n" \
-			"\tb = append(b, '\"')\n")
-		return
-	}
-
-	append(cg, "marshal",
-		"\tb = append(b, `,\"" decapitalize(camel) "\":[`...)\n" \
-		"\tfor i := 0; i < len(" f "); i++ {\n" \
-		"\t\tif i > 0 {\n" \
-		"\t\t\tb = append(b, ',')\n" \
-		"\t\t}\n" \
-		indent(codegen_marshal(d["type"], f "[i]")) \
-		"\t}\n" \
-		"\tb = append(b, ']')\n")
-}
-
-function codegen_struct_field(d, cg,    camel, f, serialize, deserialize) {
-	codegen_struct_field_marshal(d, cg)
-
-	camel = snaketocamel(d["name"])
-	f = "s." camel
-	serialize = CodegenSerialize[d["type"]]
-	deserialize = CodegenDeserialize[d["type"]]
-	if (!d["isarray"]) {
-		append(cg, "fields", "\t" camel " " CodegenGoType[d["type"]] \
-			" `json:\"" decapitalize(camel) "\"`\n")
-		append(cg, "serialize", sprintf(serialize, f))
-		append(cg, "deserialize", sprintf(deserialize, f))
-		return
-	}
-
-	append(cg, "fields", "\t" camel " []" CodegenGoType[d["type"]] \
-		" `json:\"" decapitalize(camel) "\"`\n")
-
-	# XXX: This should also check if it isn't out-of-range for any reason.
-	append(cg, "serialize",
-		sprintf(CodegenSerialize["u32"], "uint32(len(" f "))"))
-	if (d["type"] == "u8") {
-		append(cg, "serialize",
-			"\tdata = append(data, " f "...)\n")
-	} else {
-		append(cg, "serialize",
-			"\tfor i := 0; i < len(" f "); i++ {\n" \
-			indent(sprintf(serialize, f "[i]")) \
-			"\t}\n")
-	}
-
-	append(cg, "deserialize",
-		"\t{\n" \
-		"\t\tvar length uint32\n" \
-		indent(sprintf(CodegenDeserialize["u32"], "length")))
-	if (d["type"] == "u8") {
-		append(cg, "deserialize",
-			"\t\tif uint64(len(data)) < uint64(length) {\n" \
-			"\t\t\treturn nil, false\n" \
-			"\t\t}\n" \
-			"\t\t" f ", data = data[:length], data[length:]\n" \
-			"\t}\n")
-	} else {
-		append(cg, "deserialize",
-			"\t\t" f " = make([]" CodegenGoType[d["type"]] ", length)\n" \
-			"\t}\n" \
-			"\tfor i := 0; i < len(" f "); i++ {\n" \
-			indent(sprintf(deserialize, f "[i]")) \
-			"\t}\n")
-	}
-}
-
-function codegen_struct_tag(d, cg,    camel, f) {
-	codegen_struct_field_marshal(d, cg)
-
-	camel = snaketocamel(d["name"])
-	f = "s." camel
-	append(cg, "fields", "\t" camel " " CodegenGoType[d["type"]] \
-		" `json:\"" decapitalize(camel) "\"`\n")
-	append(cg, "serialize", sprintf(CodegenSerialize[d["type"]], f))
-	# Do not deserialize here, that is already done by the containing union.
-}
-
-function codegen_struct(name, cg,    gotype) {
-	gotype = PrefixCamel name
-	print "type " gotype " struct {\n" cg["fields"] "}\n"
-
-	if (cg["marshal"]) {
-		CodegenIsMarshaler[name] = 1
-		print "func (s *" gotype ") MarshalJSON() ([]byte, error) {"
-		print "\tb := []byte{}"
-		print cg["marshal"] "\tb[0] = '{'"
-		print "\treturn append(b, '}'), nil"
-		print "}"
-		print ""
-	}
-
-	if (cg["serialize"]) {
-		print "func (s *" gotype ") AppendTo(data []byte) ([]byte, bool) {"
-		print "\tok := true"
-		print cg["serialize"] "\treturn data, ok"
-		print "}"
-		print ""
-
-		CodegenSerialize[name] = \
-			"\tif data, ok = %s.AppendTo(data); !ok {\n" \
-			"\t\treturn nil, ok\n" \
-			"\t}\n"
-	}
-	if (cg["deserialize"]) {
-		print "func (s *" gotype ") ConsumeFrom(data []byte) ([]byte, bool) {"
-		print "\tok := true"
-		print cg["deserialize"] "\treturn data, ok"
-		print "}"
-		print ""
-
-		CodegenDeserialize[name] = \
-			"\tif data, ok = %s.ConsumeFrom(data); !ok {\n" \
-			"\t\treturn nil, ok\n" \
-			"\t}\n"
-	}
-
-	CodegenGoType[name] = gotype
-	for (i in cg)
-		delete cg[i]
-}
-
-function codegen_union_tag(d, cg) {
-	cg["tagtype"] = d["type"]
-	cg["tagname"] = d["name"]
-	# The tag is implied from the type of struct stored in the interface.
-}
-
-function codegen_union_struct(name, casename, cg, scg,     structname, init) {
-	# And thus not all generated structs are present in Types.
-	structname = name snaketocamel(casename)
-	codegen_struct(structname, scg)
-
-	init = CodegenGoType[structname] "{" snaketocamel(cg["tagname"]) \
-		": " decapitalize(snaketocamel(cg["tagname"])) "}"
-	append(cg, "unmarshal",
-		"\tcase " CodegenGoType[cg["tagtype"]] snaketocamel(casename) ":\n" \
-		"\t\ts := " init "\n" \
-		"\t\terr = json.Unmarshal(data, &s)\n" \
-		"\t\tu.Interface = &s\n")
-	append(cg, "serialize",
-		"\tcase *" CodegenGoType[structname] ":\n" \
-		indent(sprintf(CodegenSerialize[structname], "union")))
-	append(cg, "deserialize",
-		"\tcase " CodegenGoType[cg["tagtype"]] snaketocamel(casename) ":\n" \
-		"\t\ts := " init "\n" \
-		indent(sprintf(CodegenDeserialize[structname], "s")) \
-		"\t\tu.Interface = &s\n")
-}
-
-function codegen_union(name, cg,    gotype, tagfield, tagvar) {
-	gotype = PrefixCamel name
-	print "type " gotype " struct {"
-	print "\tInterface any"
-	print "}"
-	print ""
-
-	# This cannot be a pointer method, it wouldn't work recursively.
-	CodegenIsMarshaler[name] = 1
-	print "func (u " gotype ") MarshalJSON() ([]byte, error) {"
-	print "\treturn u.Interface.(json.Marshaler).MarshalJSON()"
-	print "}"
-	print ""
-
-	tagfield = snaketocamel(cg["tagname"])
-	tagvar = decapitalize(tagfield)
-	print "func (u *" gotype ") UnmarshalJSON(data []byte) (err error) {"
-	print "\tvar t struct {"
-	print "\t\t" tagfield " " CodegenGoType[cg["tagtype"]] \
-		" `json:\"" tagvar "\"`"
-	print "\t}"
-	print "\tif err := json.Unmarshal(data, &t); err != nil {"
-	print "\t\treturn err"
-	print "\t}"
-	print ""
-	print "\tswitch " tagvar " := t." tagfield "; " tagvar " {"
-	print cg["unmarshal"] "\tdefault:"
-	print "\t\terr = errors.New(`unsupported value: ` + " tagvar ".String())"
-	print "\t}"
-	print "\treturn err"
-	print "}"
-	print ""
-
-	# XXX: Consider changing the interface into an AppendTo/ConsumeFrom one,
-	# that would eliminate these type case switches entirely.
-	# On the other hand, it would make it possible to send unsuitable structs.
-	print "func (u *" gotype ") AppendTo(data []byte) ([]byte, bool) {"
-	print "\tok := true"
-	print "\tswitch union := u.Interface.(type) {"
-	print cg["serialize"] "\tdefault:"
-	print "\t\treturn nil, false"
-	print "\t}"
-	print "\treturn data, ok"
-	print "}"
-	print ""
-
-	CodegenSerialize[name] = \
-		"\tif data, ok = %s.AppendTo(data); !ok {\n" \
-		"\t\treturn nil, ok\n" \
-		"\t}\n"
-
-	print "func (u *" gotype ") ConsumeFrom(data []byte) ([]byte, bool) {"
-	print "\tok := true"
-	print "\tvar " tagvar " " CodegenGoType[cg["tagtype"]]
-	print sprintf(CodegenDeserialize[cg["tagtype"]], tagvar)
-	print "\tswitch " tagvar " {"
-	print cg["deserialize"] "\tdefault:"
-	print "\t\treturn nil, false"
-	print "\t}"
-	print "\treturn data, ok"
-	print "}"
-	print ""
-
-	CodegenDeserialize[name] = \
-		"\tif data, ok = %s.ConsumeFrom(data); !ok {\n" \
-		"\t\treturn nil, ok\n" \
-		"\t}\n"
-
-	CodegenGoType[name] = gotype
-	for (i in cg)
-		delete cg[i]
-}

xC-gen-proto-js.awk

@@ -1,223 +0,0 @@
-# xC-gen-proto-js.awk: Javascript backend for xC-gen-proto.awk.
-#
-# Copyright (c) 2022, Přemysl Eric Janouch <p@janouch.name>
-# SPDX-License-Identifier: 0BSD
-#
-# This backend is currently for decoding the binary format only.
-# (JSON is way too expensive to process and transfer.)
-#
-# Import the resulting script as a Javascript module.
-
-function define_internal(name) {
-	Types[name] = "internal"
-}
-
-function define_sint(size,    shortname) {
-	shortname = "i" size
-	define_internal(shortname)
-	CodegenDeserialize[shortname] = "\t%s = r." shortname "()\n"
-
-	print ""
-	print "\t" shortname "() {"
-	if (size == "64") {
-		# XXX: 2^53 - 1 must be enough for anyone.  BigInts are a PITA.
-		print "\t\tconst " shortname \
-			" = Number(this.getBigInt" size "(this.offset))"
-	} else {
-		print "\t\tconst " shortname " = this.getInt" size "(this.offset)"
-	}
-	print "\t\tthis.offset += " (size / 8)
-	print "\t\treturn " shortname
-	print "\t}"
-}
-
-function define_uint(size,    shortname) {
-	shortname = "u" size
-	define_internal(shortname)
-	CodegenDeserialize[shortname] = "\t%s = r." shortname "()\n"
-
-	print ""
-	print "\t" shortname "() {"
-	if (size == "64") {
-		# XXX: 2^53 - 1 must be enough for anyone.  BigInts are a PITA.
-		print "\t\tconst " shortname \
-			" = Number(this.getBigUint" size "(this.offset))"
-	} else {
-		print "\t\tconst " shortname " = this.getUint" size "(this.offset)"
-	}
-	print "\t\tthis.offset += " (size / 8)
-	print "\t\treturn " shortname
-	print "\t}"
-}
-
-function codegen_begin() {
-	print "export class Reader extends DataView {"
-	print "\tconstructor() {"
-	print "\t\tsuper(...arguments)"
-	print "\t\tthis.offset = 0"
-	print "\t\tthis.decoder = new TextDecoder('utf-8', {fatal: true})"
-	print "\t}"
-	print ""
-	print "\tget empty() {"
-	print "\t\treturn this.byteLength <= this.offset"
-	print "\t}"
-	print ""
-	print "\trequire(len) {"
-	print "\t\tif (this.byteLength - this.offset < len)"
-	print "\t\t\tthrow `Premature end of data`"
-	print "\t\treturn this.byteOffset + this.offset"
-	print "\t}"
-
-	define_internal("string")
-	CodegenDeserialize["string"] = "\t%s = r.string()\n"
-
-	print ""
-	print "\tstring() {"
-	print "\t\tconst len = this.getUint32(this.offset)"
-	print "\t\tthis.offset += 4"
-	print "\t\tconst array = new Uint8Array("
-	print "\t\t\tthis.buffer, this.require(len), len)"
-	print "\t\tthis.offset += len"
-	print "\t\treturn this.decoder.decode(array)"
-	print "\t}"
-
-	define_internal("bool")
-	CodegenDeserialize["bool"] = "\t%s = r.bool()\n"
-
-	print ""
-	print "\tbool() {"
-	print "\t\tconst u8 = this.getUint8(this.offset)"
-	print "\t\tthis.offset += 1"
-	print "\t\treturn u8 != 0"
-	print "\t}"
-
-	define_sint("8")
-	define_sint("16")
-	define_sint("32")
-	define_sint("64")
-	define_uint("8")
-	define_uint("16")
-	define_uint("32")
-	define_uint("64")
-
-	print "}"
-}
-
-function codegen_constant(name, value) {
-	print ""
-	print "export const " decapitalize(snaketocamel(name)) " = " value
-}
-
-function codegen_enum_value(name, subname, value, cg) {
-	append(cg, "fields", "\t" snaketocamel(subname) ": " value ",\n")
-}
-
-function codegen_enum(name, cg) {
-	print ""
-	print "export const " name " = Object.freeze({"
-	print cg["fields"] "})"
-
-	CodegenDeserialize[name] = "\t%s = r.i8()\n"
-	for (i in cg)
-		delete cg[i]
-}
-
-function codegen_struct_field(d, cg,    camel, f, deserialize) {
-	camel = decapitalize(snaketocamel(d["name"]))
-	f = "s." camel
-	append(cg, "fields", "\t" camel "\n")
-
-	deserialize = CodegenDeserialize[d["type"]]
-	if (!d["isarray"]) {
-		append(cg, "deserialize", sprintf(deserialize, f))
-		return
-	}
-
-	append(cg, "deserialize",
-		"\t{\n" \
-		indent(sprintf(CodegenDeserialize["u32"], "const len")))
-	if (d["type"] == "u8") {
-		append(cg, "deserialize",
-			"\t\t" f " = new Uint8Array(\n" \
-			"\t\t\tr.buffer, r.require(len), len)\n" \
-			"\t\tr.offset += len\n" \
-			"\t}\n")
-		return
-	}
-	if (d["type"] == "i8") {
-		append(cg, "deserialize",
-			"\t\t" f " = new Int8Array(\n" \
-			"\t\t\tr.buffer, r.require(len), len)\n" \
-			"\t\tr.offset += len\n" \
-			"\t}\n")
-		return
-	}
-
-	append(cg, "deserialize",
-		"\t\t" f " = new Array(len)\n" \
-		"\t}\n" \
-		"\tfor (let i = 0; i < " f ".length; i++)\n" \
-		indent(sprintf(deserialize, f "[i]")))
-}
-
-function codegen_struct_tag(d, cg) {
-	append(cg, "fields", "\t" decapitalize(snaketocamel(d["name"])) "\n")
-	# Do not deserialize here, that is already done by the containing union.
-}
-
-function codegen_struct(name, cg) {
-	print ""
-	print "export class " name " {"
-	print cg["fields"] cg["methods"]
-	print "\tstatic deserialize(r) {"
-	print "\t\tconst s = new " name "()"
-	print indent(cg["deserialize"]) "\t\treturn s"
-	print "\t}"
-	print "}"
-
-	CodegenDeserialize[name] = "\t%s = " name ".deserialize(r)\n"
-	for (i in cg)
-		delete cg[i]
-}
-
-function codegen_union_tag(d, cg) {
-	cg["tagtype"] = d["type"]
-	cg["tagname"] = d["name"]
-}
-
-function codegen_union_struct(name, casename, cg, scg,     structname) {
-	append(scg, "methods",
-		"\n" \
-		"\tconstructor() {\n" \
-		"\t\tthis." decapitalize(snaketocamel(cg["tagname"])) \
-			" = " cg["tagtype"] "." snaketocamel(casename) "\n" \
-		"\t}\n")
-
-	# And thus not all generated structs are present in Types.
-	structname = name snaketocamel(casename)
-	codegen_struct(structname, scg)
-
-	append(cg, "deserialize",
-		"\tcase " cg["tagtype"] "." snaketocamel(casename) ":\n" \
-		"\t{\n" \
-		indent(sprintf(CodegenDeserialize[structname], "const s")) \
-		"\t\treturn s\n" \
-		"\t}\n")
-}
-
-function codegen_union(name, cg,    tagvar) {
-	tagvar = decapitalize(snaketocamel(cg["tagname"]))
-
-	print ""
-	print "export function deserialize" name "(r) {"
-	print sprintf(CodegenDeserialize[cg["tagtype"]], "const " tagvar) \
-		"\tswitch (" tagvar ") {"
-	print cg["deserialize"] "\tdefault:"
-	print "\t\tthrow `Unknown " cg["tagtype"] " (${tagvar})`"
-	print "\t}"
-	print "}"
-
-	CodegenDeserialize[name] = "\t%s = deserialize" name "(r)\n"
-	for (i in cg)
-		delete cg[i]
-}

xC-gen-proto.awk

@@ -1,305 +0,0 @@
-# xC-gen-proto.awk: an XDR-derived code generator for network protocols.
-#
-# Copyright (c) 2022, Přemysl Eric Janouch <p@janouch.name>
-# SPDX-License-Identifier: 0BSD
-#
-# You may read RFC 4506 for context, however it is only a source of inspiration.
-# Grammar is easy to deduce from the parser.
-#
-# Native types: bool, u{8,16,32,64}, i{8,16,32,64}, string
-#
-# Don't define any new types, unless you hate yourself, then it's okay to do so.
-# Backends tend to be a pain in the arse, for different reasons.
-#
-# All numbers are encoded in big-endian byte order.
-# Booleans are one byte each.
-# Strings must be valid UTF-8, use u8<> to lift that restriction.
-# String and array lengths are encoded as u32.
-# Enumeration values automatically start at 1, and are encoded as i8.
-# Any struct or union field may be a variable-length array.
-#
-# Message framing is done externally, but also happens to prefix u32 lengths,
-# unless this role is already filled by, e.g., WebSocket.
-#
-# Usage: env LC_ALL=C awk -f xC-gen-proto.awk -f xC-gen-proto-{c,go,js}.awk \
-#  xC-proto > xC-proto.{c,go,js} | {clang-format,gofmt,...}
-
-# --- Utilities ----------------------------------------------------------------
-
-function cameltosnake(s) {
-	while (match(s, /[[:lower:]][[:upper:]]/)) {
-		s = substr(s, 1, RSTART) "_" \
-			tolower(substr(s, RSTART + 1, RLENGTH - 1)) \
-			substr(s, RSTART + RLENGTH)
-	}
-	return tolower(s)
-}
-
-function snaketocamel(s) {
-	s = toupper(substr(s, 1, 1)) tolower(substr(s, 2))
-	while (match(s, /_[[:alnum:]]/)) {
-		s = substr(s, 1, RSTART - 1) \
-			toupper(substr(s, RSTART + 1, RLENGTH - 1)) \
-			substr(s, RSTART + RLENGTH)
-	}
-	return s
-}
-
-function decapitalize(s) {
-	if (match(s, /[[:upper:]][[:lower:]]/)) {
-		return tolower(substr(s, 1, 1)) substr(s, 2)
-	}
-	return s
-}
-
-function indent(s) {
-	if (!s)
-		return s
-
-	gsub(/\n/, "\n\t", s)
-	sub(/\t*$/, "", s)
-	return "\t" s
-}
-
-function append(a, key, value) {
-	a[key] = a[key] value
-}
-
-# --- Parsing ------------------------------------------------------------------
-
-function fatal(message) {
-	print "// " FILENAME ":" FNR ": fatal error: " message
-	print FILENAME ":" FNR ": fatal error: " message > "/dev/stderr"
-	exit 1
-}
-
-function skipcomment() {
-	do {
-		if (match($0, /[*][/]/)) {
-			$0 = substr($0, RSTART + RLENGTH)
-			return
-		}
-	} while (getline > 0)
-	fatal("unterminated block comment")
-}
-
-function nexttoken() {
-	do {
-		if (match($0, /^[[:space:]]+/)) {
-			$0 = substr($0, RLENGTH + 1)
-		} else if (match($0, /^[/][/].*/)) {
-			$0 = ""
-		} else if (match($0, /^[/][*]/)) {
-			$0 = substr($0, RLENGTH + 1)
-			skipcomment()
-		} else if (match($0, /^[[:alpha:]][[:alnum:]_]*/)) {
-			Token = substr($0, 1, RLENGTH)
-			$0 = substr($0, RLENGTH + 1)
-			return Token
-		} else if (match($0, /^(0[xX][0-9a-fA-F]+|[1-9][0-9]*)/)) {
-			Token = substr($0, 1, RLENGTH)
-			$0 = substr($0, RLENGTH + 1)
-			return Token
-		} else if (/./) {
-			Token = substr($0, 1, 1)
-			$0 = substr($0, 2)
-			return Token
-		}
-	} while (/./ || getline > 0)
-	Token = ""
-	return Token
-}
-
-function expect(v) {
-	if (!v)
-		fatal("broken expectations at `" Token "' before `" $0 "'")
-	return v
-}
-
-function accept(what) {
-	if (Token != what)
-		return 0
-	nexttoken()
-	return 1
-}
-
-function identifier(    v) {
-	if (Token !~ /^[[:alpha:]]/)
-		return 0
-	v = Token
-	nexttoken()
-	return v
-}
-
-function number(    v) {
-	if (Token !~ /^[0-9]/)
-		return 0
-	v = Token
-	nexttoken()
-	return v
-}
-
-function readnumber(    ident) {
-	ident = identifier()
-	if (!ident)
-		return expect(number())
-	if (!(ident in Consts))
-		fatal("unknown constant: " ident)
-	return Consts[ident]
-}
-
-function defconst(    ident, num) {
-	if (!accept("const"))
-		return 0
-
-	ident = expect(identifier())
-	expect(accept("="))
-	num = readnumber()
-	if (ident in Consts)
-		fatal("constant redefined: " ident)
-
-	Consts[ident] = num
-	codegen_constant(ident, num)
-	return 1
-}
-
-function readtype(    ident) {
-	ident = deftype()
-	if (ident)
-		return ident
-
-	ident = identifier()
-	if (!ident)
-		return 0
-
-	if (!(ident in Types))
-		fatal("unknown type: " ident)
-	return ident
-}
-
-function defenum(    name, ident, value, cg) {
-	delete cg[0]
-
-	name = expect(identifier())
-	expect(accept("{"))
-	while (!accept("}")) {
-		ident = expect(identifier())
-		value = value + 1
-		if (accept("="))
-			value = readnumber()
-		if (!value)
-			fatal("enumeration values cannot be zero")
-		if (value < -128 || value > 127)
-			fatal("enumeration value out of range")
-		expect(accept(","))
-		append(EnumValues, name, SUBSEP ident)
-		if (EnumValues[name, ident]++)
-			fatal("duplicate enum value: " ident)
-		codegen_enum_value(name, ident, value, cg)
-	}
-
-	Types[name] = "enum"
-	codegen_enum(name, cg)
-	return name
-}
-
-function readfield(out,    nonvoid) {
-	nonvoid = !accept("void")
-	if (nonvoid) {
-		out["type"] = expect(readtype())
-		out["name"] = expect(identifier())
-		# TODO: Consider supporting XDR's VLA length limits here.
-		# TODO: Consider supporting XDR's fixed-length syntax for string limits.
-		out["isarray"] = accept("<") && expect(accept(">"))
-	}
-	expect(accept(";"))
-	return nonvoid
-}
-
-function defstruct(    name, d, cg) {
-	delete d[0]
-	delete cg[0]
-
-	name = expect(identifier())
-	expect(accept("{"))
-	while (!accept("}")) {
-		if (readfield(d))
-			codegen_struct_field(d, cg)
-	}
-
-	Types[name] = "struct"
-	codegen_struct(name, cg)
-	return name
-}
-
-function defunion(    name, tag, tagtype, tagvalue, cg, scg, d, a, i, unseen) {
-	delete cg[0]
-	delete scg[0]
-	delete d[0]
-
-	name = expect(identifier())
-	expect(accept("switch"))
-	expect(accept("("))
-	tag["type"] = tagtype = expect(readtype())
-	tag["name"] = expect(identifier())
-	expect(accept(")"))
-
-	if (Types[tagtype] != "enum")
-		fatal("not an enum type: " tagtype)
-	codegen_union_tag(tag, cg)
-
-	split(EnumValues[tagtype], a, SUBSEP)
-	for (i in a)
-		unseen[a[i]]++
-
-	expect(accept("{"))
-	while (!accept("}")) {
-		if (accept("case")) {
-			if (tagvalue)
-				codegen_union_struct(name, tagvalue, cg, scg)
-
-			tagvalue = expect(identifier())
-			expect(accept(":"))
-			if (!unseen[tagvalue]--)
-				fatal("no such value or duplicate case: " tagtype "." tagvalue)
-			codegen_struct_tag(tag, scg)
-		} else if (tagvalue) {
-			if (readfield(d))
-				codegen_struct_field(d, scg)
-		} else {
-			fatal("union fields must fall under a case")
-		}
-	}
-	if (tagvalue)
-		codegen_union_struct(name, tagvalue, cg, scg)
-
-	# What remains non-zero in unseen[2..] is simply not recognized/allowed.
-	Types[name] = "union"
-	codegen_union(name, cg)
-	return name
-}
-
-function deftype() {
-	if (accept("enum"))
-		return defenum()
-	if (accept("struct"))
-		return defstruct()
-	if (accept("union"))
-		return defunion()
-	return 0
-}
-
-BEGIN {
-	PrefixLower = "relay_"
-	PrefixUpper = "RELAY_"
-	PrefixCamel = "Relay"
-
-	print "// Generated by xC-gen-proto.awk. DO NOT MODIFY."
-	codegen_begin()
-
-	nexttoken()
-	while (Token != "") {
-		expect(defconst() || deftype())
-		expect(accept(";"))
-	}
-}

xC.c

@@ -1,7 +1,7 @@
 /*
  * xC.c: a terminal-based IRC client
  *
- * Copyright (c) 2015 - 2022, Přemysl Eric Janouch <p@janouch.name>
+ * Copyright (c) 2015 - 2024, Přemysl Eric Janouch <p@janouch.name>
  *
  * Permission to use, copy, modify, and/or distribute this software for any
  * purpose with or without fee is hereby granted.
@@ -50,6 +50,7 @@ enum
 
 // fmemopen
 #define _POSIX_C_SOURCE 200809L
+#define _XOPEN_SOURCE 700
 
 #include "common.c"
 #include "xD-replies.c"
@@ -228,9 +229,13 @@ struct input_vtable
 	/// Create a new input buffer
 	input_buffer_t (*buffer_new) (void *input);
 	/// Destroy an input buffer
-	void (*buffer_destroy) (void *input, input_buffer_t buffer);
+	void (*buffer_destroy) (void *input, input_buffer_t);
 	/// Switch to a different input buffer
-	void (*buffer_switch) (void *input, input_buffer_t buffer);
+	void (*buffer_switch) (void *input, input_buffer_t);
+	/// Return all history lines in the locale encoding
+	struct strv (*buffer_get_history) (void *input, input_buffer_t);
+	/// Add a history line in the locale encoding
+	void (*buffer_add_history) (void *input, input_buffer_t, const char *);
 
 	/// Register a function that can be bound to character sequences
 	void (*register_fn) (void *input,
@@ -259,6 +264,7 @@ struct input_vtable
 	XX (start) XX (stop) XX (prepare) XX (destroy)                             \
 	XX (hide) XX (show) XX (get_prompt) XX (set_prompt) XX (ding)              \
 	XX (buffer_new) XX (buffer_destroy) XX (buffer_switch)                     \
+	XX (buffer_get_history) XX (buffer_add_history)                            \
 	XX (register_fn) XX (bind) XX (bind_control) XX (bind_meta)                \
 	XX (get_line) XX (clear_line) XX (insert)                                  \
 	XX (on_tty_resized) XX (on_tty_readable)
@@ -562,6 +568,7 @@ input_rl_buffer_switch (void *input, input_buffer_t input_buffer)
 {
 	struct input_rl *self = input;
 	struct input_rl_buffer *buffer = input_buffer;
+
 	// There could possibly be occurences of the current undo list in some
 	// history entry.  We either need to free the undo list, or move it
 	// somewhere else to load back later, as the buffer we're switching to
@@ -584,6 +591,38 @@ input_rl_buffer_switch (void *input, input_buffer_t input_buffer)
 	self->current = buffer;
 }
 
+static struct strv
+input_rl_buffer_get_history (void *input, input_buffer_t input_buffer)
+{
+	(void) input;
+	struct input_rl_buffer *buffer = input_buffer;
+	HIST_ENTRY **p =
+		buffer->history ? buffer->history->entries : history_list();
+	struct strv v = strv_make ();
+	while (p && *p)
+		strv_append (&v, (*p++)->line);
+	return v;
+}
+
+static void
+input_rl_buffer_add_history (void *input, input_buffer_t input_buffer,
+	const char *line)
+{
+	(void) input;
+	struct input_rl_buffer *buffer = input_buffer;
+
+	// For inactive buffers, we'd have to either alloc_history_entry(),
+	// construe a timestamp, and manually insert it into saved HISTORY_STATEs,
+	// or temporarily switch histories.
+	if (!buffer->history)
+	{
+		bool at_end = where_history () == history_length;
+		add_history (line);
+		if (at_end)
+			next_history ();
+	}
+}
+
 static void
 input_rl__buffer_destroy_wo_history (struct input_rl_buffer *self)
 {
@@ -1055,10 +1094,55 @@ input_el_buffer_switch (void *input, input_buffer_t input_buffer)
 
 	self->current = buffer;
 	el_wset (self->editline, EL_HIST, history, buffer->history);
+	// We only know how to reset the history position to be at the end.
 	input_el__start_over (self);
 	input_el__restore_buffer (self, buffer);
 }
 
+static struct strv
+input_el_buffer_get_history (void *input, input_buffer_t input_buffer)
+{
+	(void) input;
+	struct input_el_buffer *buffer = input_buffer;
+	struct strv v = strv_make ();
+	HistEventW ev;
+	if (history_w (buffer->history, &ev, H_LAST) < 0)
+		return v;
+
+	do
+	{
+		size_t len = wcstombs (NULL, ev.str, 0);
+		if (len++ == (size_t) -1)
+			continue;
+
+		char *mb = xmalloc (len);
+		mb[wcstombs (mb, ev.str, len)] = 0;
+		strv_append_owned (&v, mb);
+	}
+	while (history_w (buffer->history, &ev, H_PREV) >= 0);
+	return v;
+}
+
+static void
+input_el_buffer_add_history (void *input, input_buffer_t input_buffer,
+	const char *line)
+{
+	(void) input;
+	struct input_el_buffer *buffer = input_buffer;
+
+	// When currently iterating history, this makes editline's internal
+	// history pointer wrongly point to a newer entry.
+	size_t len = mbstowcs (NULL, line, 0);
+	if (len++ != (size_t) -1)
+	{
+		wchar_t *wc = xcalloc (len, sizeof *wc);
+		wc[mbstowcs (wc, line, len)] = 0;
+		HistEventW ev;
+		(void) history_w (buffer->history, &ev, H_ENTER, wc);
+		free (wc);
+	}
+}
+
 static void
 input_el_buffer_destroy (void *input, input_buffer_t input_buffer)
 {
@@ -2862,12 +2946,15 @@ relay_send (struct client *c)
 }
 
 static void
-relay_broadcast (struct app_context *ctx)
+relay_broadcast_except (struct app_context *ctx, struct client *exception)
 {
 	LIST_FOR_EACH (struct client, c, ctx->clients)
-		relay_send (c);
+		if (c != exception)
+			relay_send (c);
 }
 
+#define relay_broadcast(ctx) relay_broadcast_except ((ctx), NULL)
+
 static struct relay_event_message *
 relay_prepare (struct app_context *ctx)
 {
@@ -3092,6 +3179,17 @@ relay_prepare_buffer_activate (struct app_context *ctx, struct buffer *buffer)
 	e->buffer_name = str_from_cstr (buffer->name);
 }
 
+static void
+relay_prepare_buffer_input (struct app_context *ctx, struct buffer *buffer,
+	const char *input)
+{
+	struct relay_event_message *m = relay_prepare (ctx);
+	struct relay_event_data_buffer_input *e = &m->data.buffer_input;
+	e->event = RELAY_EVENT_BUFFER_INPUT;
+	e->buffer_name = str_from_cstr (buffer->name);
+	e->text = str_from_cstr (input);
+}
+
 static void
 relay_prepare_buffer_clear (struct app_context *ctx,
 	struct buffer *buffer)
@@ -4612,34 +4710,30 @@ log_formatter (struct app_context *ctx, struct buffer *buffer,
 		&& buffer->type == BUFFER_SERVER)
 	 || (ctx->current_buffer->type != BUFFER_GLOBAL
 		&& buffer == ctx->current_buffer->server->buffer))
-		can_leak = true;
+		can_leak = !ctx->isolate_buffers;
 
-	relay_prepare_buffer_line (ctx, buffer, line,
-		buffer != ctx->current_buffer && !ctx->isolate_buffers && can_leak);
+	bool leak_to_active = buffer != ctx->current_buffer && can_leak;
+	relay_prepare_buffer_line (ctx, buffer, line, leak_to_active);
 	relay_broadcast (ctx);
 
-	bool displayed = true;
-	if (ctx->terminal_suspended > 0)
-		// Another process is using the terminal
-		displayed = false;
-	else if (buffer == ctx->current_buffer)
-		buffer_line_display (ctx, buffer, line, false);
-	else if (!ctx->isolate_buffers && can_leak)
-		buffer_line_display (ctx, buffer, line, true);
-	else
-		displayed = false;
+	bool visible = (buffer == ctx->current_buffer || leak_to_active)
+		&& ctx->terminal_suspended <= 0;
 
-	// Advance the unread marker in active buffers but don't create a new one
-	if (!displayed
-	 || (buffer == ctx->current_buffer && buffer->new_messages_count))
+	// Advance the unread marker but don't create a new one
+	if (!visible || buffer->new_messages_count)
 	{
 		buffer->new_messages_count++;
-		if (flags & BUFFER_LINE_UNIMPORTANT)
+		if ((flags & BUFFER_LINE_UNIMPORTANT) || leak_to_active)
 			buffer->new_unimportant_count++;
-		buffer->highlighted |= important;
 	}
-	if (!displayed)
+
+	if (visible)
+		buffer_line_display (ctx, buffer, line, leak_to_active);
+	else
+	{
+		buffer->highlighted |= important;
 		refresh_prompt (ctx);
+	}
 }
 
 static void
@@ -8223,6 +8317,8 @@ irc_try_parse_welcome_for_userhost (struct server *s, const char *m)
 	strv_free (&v);
 }
 
+static void process_input
+	(struct app_context *, struct buffer *, const char *);
 static bool process_input_line
 	(struct app_context *, struct buffer *, const char *, int);
 static void on_autoaway_timer (struct app_context *ctx);
@@ -8251,7 +8347,7 @@ irc_on_registered (struct server *s, const char *nickname)
 	if (command)
 	{
 		log_server_debug (s, "Executing \"#s\"", command);
-		(void) process_input_line (s->ctx, s->buffer, command, 0);
+		(void) process_input (s->ctx, s->buffer, command);
 	}
 
 	int64_t command_delay = get_config_integer (s->config, "command_delay");
@@ -9345,6 +9441,9 @@ server_add (struct app_context *ctx,
 	str_map_set (&ctx->servers, s->name, s);
 	s->config = subtree;
 
+	relay_prepare_server_update (ctx, s);
+	relay_broadcast (ctx);
+
 	// Add a buffer and activate it
 	struct buffer *buffer = s->buffer = buffer_new (ctx->input,
 		BUFFER_SERVER, irc_make_buffer_name (s, NULL));
@@ -12843,6 +12942,16 @@ handle_command_kill (struct handler_args *a)
 	return true;
 }
 
+static bool
+handle_command_away (struct handler_args *a)
+{
+	if (*a->arguments)
+		irc_send (a->s, "AWAY :%s", a->arguments);
+	else
+		irc_send (a->s, "AWAY");
+	return true;
+}
+
 static bool
 handle_command_nick (struct handler_args *a)
 {
@@ -12908,7 +13017,6 @@ TRIVIAL_HANDLER (who,   "WHO")
 TRIVIAL_HANDLER (motd,  "MOTD")
 TRIVIAL_HANDLER (oper,  "OPER")
 TRIVIAL_HANDLER (stats, "STATS")
-TRIVIAL_HANDLER (away,  "AWAY")
 
 // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
 
@@ -15258,12 +15366,18 @@ on_pending_input (struct app_context *ctx)
 	poller_idle_reset (&ctx->input_event);
 	for (size_t i = 0; i < ctx->pending_input.len; i++)
 	{
-		char *input = iconv_xstrdup
-			(ctx->term_to_utf8, ctx->pending_input.vector[i], -1, NULL);
-		if (input)
-			process_input (ctx, ctx->current_buffer, input);
-		else
+		char *input = iconv_xstrdup (ctx->term_to_utf8,
+			ctx->pending_input.vector[i], -1, NULL);
+		if (!input)
+		{
 			print_error ("character conversion failed for: %s", "user input");
+			continue;
+		}
+
+		relay_prepare_buffer_input (ctx, ctx->current_buffer, input);
+		relay_broadcast (ctx);
+
+		process_input (ctx, ctx->current_buffer, input);
 		free (input);
 	}
 	strv_reset (&ctx->pending_input);
@@ -15311,6 +15425,29 @@ init_poller_events (struct app_context *ctx)
 
 // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
 
+static void
+client_resync_buffer_input (struct client *c, struct buffer *buffer)
+{
+	struct strv history =
+		CALL_ (c->ctx->input, buffer_get_history, buffer->input_data);
+	for (size_t i = 0; i < history.len; i++)
+	{
+		char *input = iconv_xstrdup (c->ctx->term_to_utf8,
+			history.vector[i], -1, NULL);
+		if (!input)
+		{
+			print_error ("character conversion failed for: %s",
+				"user input history");
+			continue;
+		}
+
+		relay_prepare_buffer_input (c->ctx, buffer, input);
+		relay_send (c);
+		free (input);
+	}
+	strv_free (&history);
+}
+
 static void
 client_resync (struct client *c)
 {
@@ -15329,6 +15466,8 @@ client_resync (struct client *c)
 		relay_prepare_buffer_stats (c->ctx, buffer);
 		relay_send (c);
 
+		client_resync_buffer_input (c, buffer);
+
 		LIST_FOR_EACH (struct buffer_line, line, buffer->lines)
 		{
 			relay_prepare_buffer_line (c->ctx, buffer, line, false);
@@ -15346,7 +15485,7 @@ client_message_buffer_name (const struct relay_command_message *m)
 	switch (m->data.command)
 	{
 	case RELAY_COMMAND_BUFFER_COMPLETE:
-		return m->data.buffer_input.buffer_name.str;
+		return m->data.buffer_complete.buffer_name.str;
 	case RELAY_COMMAND_BUFFER_ACTIVATE:
 		return m->data.buffer_activate.buffer_name.str;
 	case RELAY_COMMAND_BUFFER_INPUT:
@@ -15400,18 +15539,31 @@ out:
 	relay_send (c);
 }
 
+static void
+client_process_buffer_input
+	(struct client *c, struct buffer *buffer, const char *input)
+{
+	char *mb = iconv_xstrdup (c->ctx->term_from_utf8, (char *) input, -1, NULL);
+	CALL_ (c->ctx->input, buffer_add_history, buffer->input_data, mb);
+	free (mb);
+
+	relay_prepare_buffer_input (c->ctx, buffer, input);
+	relay_broadcast_except (c->ctx, c);
+
+	process_input (c->ctx, buffer, input);
+}
+
 static void
 client_process_buffer_log
 	(struct client *c, uint32_t seq, struct buffer *buffer)
 {
-	struct relay_event_data_response *e = relay_prepare_response (c->ctx, seq);
-	e->data.command = RELAY_COMMAND_BUFFER_LOG;
-
+	// XXX: We log failures to the global buffer,
+	//   so the client just receives nothing if there is no log file.
+	struct str log = str_make ();
 	char *path = buffer_get_log_path (buffer);
 	FILE *fp = open_log_path (c->ctx, buffer, path);
 	if (fp)
 	{
-		struct str log = str_make ();
 		char buf[BUFSIZ];
 		size_t len;
 		while ((len = fread (buf, 1, sizeof buf, fp)))
@@ -15419,17 +15571,15 @@ client_process_buffer_log
 		if (ferror (fp))
 			log_global_error (c->ctx, "Failed to read `#l': #l",
 				path, strerror (errno));
-
-		// On overflow, it will later fail serialization.
-		e->data.buffer_log.log_len = MIN (UINT32_MAX, log.len);
-		e->data.buffer_log.log = (uint8_t *) str_steal (&log);
 		fclose (fp);
 	}
-
-	// XXX: We log failures to the global buffer,
-	//   so the client just receives nothing if there is no log file.
-
 	free (path);
+
+	struct relay_event_data_response *e = relay_prepare_response (c->ctx, seq);
+	e->data.command = RELAY_COMMAND_BUFFER_LOG;
+	// On overflow, it will later fail serialization (frame will be too long).
+	e->data.buffer_log.log_len = MIN (UINT32_MAX, log.len);
+	e->data.buffer_log.log = (uint8_t *) str_steal (&log);
 	relay_send (c);
 }
 
@@ -15482,7 +15632,7 @@ client_process_message (struct client *c,
 		buffer_activate (c->ctx, buffer);
 		break;
 	case RELAY_COMMAND_BUFFER_INPUT:
-		process_input (c->ctx, buffer, m->data.buffer_input.text.str);
+		client_process_buffer_input (c, buffer, m->data.buffer_input.text.str);
 		break;
 	case RELAY_COMMAND_BUFFER_TOGGLE_UNIMPORTANT:
 		buffer_toggle_unimportant (c->ctx, buffer);
@@ -15717,6 +15867,7 @@ relay_start (struct app_context *ctx, char *address, struct error **e)
 	}
 
 	// Just try the first one, disregarding IPv4/IPv6 ordering.
+	// Use 0.0.0.0 or [::] to request either one specifically.
 	int fd = relay_listen_with_context (ctx, result, e);
 	freeaddrinfo (result);
 	if (fd == -1)
@@ -15866,14 +16017,29 @@ show_logo (struct app_context *ctx)
 static void
 format_input_and_die (struct app_context *ctx)
 {
-	char buf[513];
-	while (fgets (buf, sizeof buf, stdin))
+	// XXX: it might make sense to allow for redirection, using FLUSH_OPT_RAW
+	struct str s = str_make ();
+	int c = 0;
+	while ((c = fgetc (stdin)) != EOF)
 	{
+		if (c != '\n')
+		{
+			str_append_c (&s, c);
+			continue;
+		}
+
 		struct formatter f = formatter_make (ctx, NULL);
-		formatter_add (&f, "#m", buf);
+		formatter_add (&f, "#m\n", s.str);
 		formatter_flush (&f, stdout, FLUSH_OPT_NOWRAP);
 		formatter_free (&f);
+		str_reset (&s);
 	}
+
+	struct formatter f = formatter_make (ctx, NULL);
+	formatter_add (&f, "#m", s.str);
+	formatter_flush (&f, stdout, FLUSH_OPT_NOWRAP);
+	formatter_free (&f);
+	str_free (&s);
 	exit (EXIT_SUCCESS);
 }
 
@@ -15937,7 +16103,11 @@ main (int argc, char *argv[])
 
 	// The following part is a bit brittle because of interdependencies
 	init_colors (&ctx);
-	if (format_mode)  format_input_and_die (&ctx);
+	if (format_mode)
+		format_input_and_die (&ctx);
+	if (!cur_term)
+		exit_fatal ("terminal initialization failed");
+
 	init_global_buffer (&ctx);
 	show_logo (&ctx);
 	setup_signal_handlers ();

xC.lxdr

@@ -59,6 +59,7 @@ struct EventMessage {
 		BUFFER_RENAME,
 		BUFFER_REMOVE,
 		BUFFER_ACTIVATE,
+		BUFFER_INPUT,
 		BUFFER_CLEAR,
 		SERVER_UPDATE,
 		SERVER_RENAME,
@@ -153,6 +154,9 @@ struct EventMessage {
 		string buffer_name;
 	case BUFFER_ACTIVATE:
 		string buffer_name;
+	case BUFFER_INPUT:
+		string buffer_name;
+		string text;
 	case BUFFER_CLEAR:
 		string buffer_name;
 

xD-gen-replies.awk

@@ -2,14 +2,14 @@
 BEGIN {
 	# The message catalog is a by-product
 	msg = "xD.msg"
-	print "$quote \"" > msg;
-	print "$set 1" > msg;
+	print "$quote \"" > msg
+	print "$set 1" > msg
 }
 
 /^[0-9]+ *IRC_(ERR|RPL)_[A-Z]+ *".*"$/ {
-	match($0, /".*"/);
-	ids[$1] = $2;
-	texts[$2] = substr($0, RSTART, RLENGTH);
+	match($0, /".*"/)
+	ids[$1] = $2
+	texts[$2] = substr($0, RSTART, RLENGTH)
 	print $1 " " texts[$2] > msg
 }
 

xD.c

@@ -49,7 +49,7 @@ static struct simple_config_item g_config_table[] =
 	{ "tls_key",         NULL,              "Server TLS private key (PEM)"   },
 	{ "tls_ciphers",     DEFAULT_CIPHERS,   "OpenSSL cipher list"            },
 
-	{ "operators",       NULL, "IRCop TLS client cert. SHA-1 fingerprints"   },
+	{ "operators",       NULL, "IRCop TLS client cert. SHA-256 fingerprints" },
 
 	{ "max_connections", "0",               "Global connection limit"        },
 	{ "ping_interval",   "180",             "Interval between PINGs (sec)"   },
@@ -296,7 +296,7 @@ irc_is_valid_user_mask (const char *mask)
 static bool
 irc_is_valid_fingerprint (const char *fp)
 {
-	return irc_regex_match ("^[a-fA-F0-9]{40}$", fp);
+	return irc_regex_match ("^[a-fA-F0-9]{64}$", fp);
 }
 
 // --- Clients (equals users) --------------------------------------------------
@@ -1005,8 +1005,8 @@ client_get_ssl_cert_fingerprint (struct client *c)
 	if (i2d_X509 (peer_cert, &p) < 0)
 		return NULL;
 
-	unsigned char hash[SHA_DIGEST_LENGTH];
-	SHA1 (cert, cert_len, hash);
+	unsigned char hash[SHA256_DIGEST_LENGTH];
+	SHA256 (cert, cert_len, hash);
 
 	struct str fingerprint = str_make ();
 	for (size_t i = 0; i < sizeof hash; i++)

xF.svg

@@ -1,8 +1,6 @@
 <?xml version="1.0" encoding="UTF-8" standalone="no"?>
 <svg version="1.1" width="48" height="48" viewBox="0 0 48 48"
-   xmlns:xlink="http://www.w3.org/1999/xlink"
-   xmlns="http://www.w3.org/2000/svg"
-   xmlns:svg="http://www.w3.org/2000/svg">
+   xmlns="http://www.w3.org/2000/svg">
 
   <defs>
     <linearGradient id="background" x1="0" y1="0" x2="1" y2="1">

xK-version

@@ -0,0 +1 @@
+2.0.0

xM/CMakeLists.txt

@@ -0,0 +1,45 @@
+# Swift language support
+cmake_minimum_required (VERSION 3.15)
+
+file (READ ../xK-version project_version)
+configure_file (../xK-version xK-version.tag COPYONLY)
+string (STRIP "${project_version}" project_version)
+
+# There were two issues when building this from the main CMakeLists.txt:
+# a) renaming main.swift to xM.swift requires removing top-level statements,
+# b) there is a "redefinition of module 'FFI'" error.
+project (xM VERSION "${project_version}"
+	DESCRIPTION "Cocoa frontend for xC" LANGUAGES Swift)
+
+set (root "${PROJECT_SOURCE_DIR}/..")
+add_custom_command (OUTPUT xC-proto.swift
+	COMMAND env LC_ALL=C awk
+		-f ${root}/liberty/tools/lxdrgen.awk
+		-f ${root}/liberty/tools/lxdrgen-swift.awk
+		-v PrefixCamel=Relay
+		${root}/xC.lxdr > xC-proto.swift
+	DEPENDS
+		${root}/liberty/tools/lxdrgen.awk
+		${root}/liberty/tools/lxdrgen-swift.awk
+		${root}/xC.lxdr
+	COMMENT "Generating xC relay protocol code" VERBATIM)
+
+set (MACOSX_BUNDLE_GUI_IDENTIFIER name.janouch.${PROJECT_NAME})
+set (MACOSX_BUNDLE_ICON_FILE xM.icns)
+
+# Avoid including binary files in the repository by generating icons in code.
+# sips(1) + Javascript + iconutil(1) could probably also be used.
+find_program (SWIFT_EXECUTABLE swift REQUIRED)
+
+set (icon "${PROJECT_BINARY_DIR}/${MACOSX_BUNDLE_ICON_FILE}")
+add_custom_command (OUTPUT "${icon}"
+	COMMAND ${SWIFT_EXECUTABLE} "${PROJECT_SOURCE_DIR}/gen-icon.swift" "${icon}"
+	DEPENDS gen-icon.swift
+	COMMENT "Generating xM application icon" VERBATIM)
+set_source_files_properties ("${icon}" PROPERTIES
+	MACOSX_PACKAGE_LOCATION Resources)
+
+# Other requirements: macOS 10.14 for Network, and macOS 11 for Logger.
+set (CMAKE_Swift_LANGUAGE_VERSION 5)
+add_executable (xM MACOSX_BUNDLE
+	main.swift "${icon}" "${PROJECT_BINARY_DIR}/xC-proto.swift")

xM/gen-icon.swift

@@ -0,0 +1,96 @@
+// gen-icon.swift: generate a program icon for xM in the Apple icon format
+//
+// Copyright (c) 2023, Přemysl Eric Janouch <p@janouch.name>
+// SPDX-License-Identifier: 0BSD
+//
+// NSGraphicsContext mostly just weirdly wraps over Quartz,
+// so we do it all in Quartz directly.
+import CoreGraphics
+import Foundation
+import ImageIO
+import UniformTypeIdentifiers
+
+// Apple uses something that's close to a "quintic superellipse" in their icons,
+// but doesn't quite match. Either way, it looks better than rounded rectangles.
+func addSquircle(context: CGContext, bounds: CGRect) {
+	context.move(to: CGPoint(x: bounds.maxX, y: bounds.midY))
+	for theta in stride(from: 0.0, to: .pi * 2, by: .pi / 1e4) {
+		let x = pow(abs(cos(theta)), 2 / 5.0) * bounds.width / 2
+			* CGFloat(signOf: cos(theta), magnitudeOf: 1) + bounds.midX
+		let y = pow(abs(sin(theta)), 2 / 5.0) * bounds.height / 2
+			* CGFloat(signOf: sin(theta), magnitudeOf: 1) + bounds.midY
+		context.addLine(to: CGPoint(x: x, y: y))
+	}
+	context.closePath()
+}
+
+func drawIcon(scale: CGFloat) -> CGImage? {
+	let size = CGSizeMake(1024, 1024)
+
+	let colorspace = CGColorSpaceCreateDeviceRGB()
+	let context = CGContext(data: nil,
+		width: Int(size.width * scale), height: Int(size.height * scale),
+		bitsPerComponent: 8, bytesPerRow: 0, space: colorspace,
+		bitmapInfo: CGImageAlphaInfo.premultipliedLast.rawValue)!
+	context.scaleBy(x: scale, y: scale)
+
+	let bounds = CGRectMake(100, 100, size.width - 200, size.height - 200)
+	addSquircle(context: context, bounds: bounds)
+	let squircle = context.path!
+
+	// Gradients don't draw shadows, so draw it separately.
+	context.saveGState()
+	context.setShadow(offset: CGSizeMake(0, -12).applying(context.ctm),
+		blur: 28 * scale, color: CGColor(gray: 0, alpha: 0.5))
+	context.setFillColor(CGColor(red: 1, green: 0x55p-8, blue: 0, alpha: 1))
+	context.fillPath()
+	context.restoreGState()
+
+	context.saveGState()
+	context.addPath(squircle)
+	context.clip()
+	context.drawLinearGradient(
+		CGGradient(colorsSpace: colorspace, colors: [
+			CGColor(red: 1, green: 0x00p-8, blue: 0, alpha: 1),
+			CGColor(red: 1, green: 0xaap-8, blue: 0, alpha: 1)
+		] as CFArray, locations: [0, 1])!,
+		start: CGPointMake(0, 100), end: CGPointMake(0, size.height - 100),
+		options: CGGradientDrawingOptions(rawValue: 0))
+	context.restoreGState()
+
+	context.move(to: CGPoint(x: size.width * 0.30, y: size.height * 0.30))
+	context.addLine(to: CGPoint(x: size.width * 0.30, y: size.height * 0.70))
+	context.addLine(to: CGPoint(x: size.width * 0.575, y: size.height * 0.425))
+	context.move(to: CGPoint(x: size.width * 0.70, y: size.height * 0.30))
+	context.addLine(to: CGPoint(x: size.width * 0.70, y: size.height * 0.70))
+	context.addLine(to: CGPoint(x: size.width * 0.425, y: size.height * 0.425))
+	context.setLineWidth(80)
+	context.setLineCap(.round)
+	context.setLineJoin(.round)
+	context.setStrokeColor(CGColor.white)
+	context.strokePath()
+	return context.makeImage()
+}
+
+if CommandLine.arguments.count != 2 {
+	print("Usage: \(CommandLine.arguments.first!) OUTPUT.icns")
+	exit(EXIT_FAILURE)
+}
+
+let filename = CommandLine.arguments[1]
+
+let macOSSizes: Array<CGFloat> = [16, 32, 128, 256, 512]
+let icns = CGImageDestinationCreateWithURL(
+	URL(fileURLWithPath: filename) as CFURL,
+	UTType.icns.identifier as CFString, macOSSizes.count * 2, nil)!
+for size in macOSSizes {
+	CGImageDestinationAddImage(icns, drawIcon(scale: size / 1024.0)!, nil)
+	CGImageDestinationAddImage(icns, drawIcon(scale: size / 1024.0 * 2)!, [
+			kCGImagePropertyDPIWidth: 144,
+			kCGImagePropertyDPIHeight: 144,
+		] as CFDictionary)
+}
+if !CGImageDestinationFinalize(icns) {
+	print("ICNS finalization failed.")
+	exit(EXIT_FAILURE)
+}

xN/.gitignore

@@ -0,0 +1,3 @@
+/xN
+/xN.1
+/irc.go

xN/Makefile

@@ -0,0 +1,21 @@
+.POSIX:
+.SUFFIXES:
+AWK = env LC_ALL=C awk
+
+outputs = irc.go xN xN.1
+all: $(outputs)
+
+# If we want to keep module dependencies separate, we don't have many options.
+# Symlinking seems to work good enough.
+irc.go: ../xS/irc.go
+	ln -sf ../xS/irc.go $@
+
+xN: xN.go ../xK-version irc.go
+	go build -ldflags "-X 'main.projectVersion=$$(cat ../xK-version)'" -o $@
+xN.1: ../xK-version ../liberty/tools/asciiman.awk xN.adoc
+	env "asciidoc-release-version=$$(cat ../xK-version)" \
+		$(AWK) -f ../liberty/tools/asciiman.awk xN.adoc > $@
+test: all
+	go test
+clean:
+	rm -f $(outputs)

xN/go.mod

@@ -0,0 +1,3 @@
+module janouch.name/xK/xN
+
+go 1.19

xN/xN.adoc

@@ -0,0 +1,86 @@
+xN(1)
+=====
+:doctype: manpage
+:manmanual: xK Manual
+:mansource: xK {release-version}
+
+Name
+----
+xN - IRC notifier
+
+Synopsis
+--------
+*xN* [_OPTION_]... IRC-URL...
+
+Description
+-----------
+*xN* is a simple IRC notifier, sending the text it receives on its standard
+input to all IRC targets specified by its command line arguments.
+
+The input text is forced to validate as UTF-8, and it is _not_ split
+automatically to comply with the maximum IRC message length.
+Thus, make sure to make the lines short, or they will be trimmed by the servers.
+
+*xN* does not attempt to appease flood detectors.
+
+Options
+-------
+*-debug*::
+	Print incoming IRC traffic, which may help in debugging any issues.
+
+*-version*::
+	Output version information and exit.
+
+URL format
+----------
+*xN* accepts URLs describing IRC users and channels, roughly as specified by
+the Internet Draft _draft-butcher-irc-url-04.txt_.  Note, however, that close
+to no validation is done on these, and you should not pass URLs from untrusted
+sources, so as to avoid command or parameter injection.
+
+Any provided username will be propagated to the nickname, username,
+and realname.  The default value for these is the name of your system user.
+
+As an extension, you may use the following options:
+
+*skipjoin*::
+	Do not JOIN channels before sending messages to them.
+	This requires channels to allow external messages
+	(which are disabled by channel mode *+n*).
+*usenotice*::
+	Send a NOTICE rather than a PRIVMSG, which distinguishes automated messages,
+	and is more appropriate for bots.
+
+Examples
+--------
+ $ uptime | xN 'irc://uptime@localhost/%23watch?skipjoin&usenotice'
+
+Send *uptime*(1) information as an external notice to channel *#watch*
+on the local server, using the standard port *6667*.
+
+ $ fortune -s | xN ircs://ohayou@irc.libera.chat/john,isuser
+
+Greet user *john* with a fortune for this day.  In compliance with _RFC 7194_,
+the default TLS port is assumed to be *6697*.
+
+ $ xN 'ircs://agent:Password123@irc.cia.gov:1337/#hq?key=123456' <<EOF
+ The red fox trots quietly at midnight.
+ EOF
+
+Connect over TLS to *irc.cia.gov* on port *1337*, use *Password123*
+as the server password, register as user *agent*,
+join channel *#hq* using the channel key *123456*,
+and send a very secret message.
+
+Reporting bugs
+--------------
+Use https://git.janouch.name/p/xK to report bugs, request features,
+or submit pull requests.
+
+See also
+--------
+_Uniform Resource Locator Schemes for Internet Relay Chat Entities_,
+https://datatracker.ietf.org/doc/html/draft-butcher-irc-url-04[].
+
+_Default Port for Internet Relay Chat (IRC) via TLS/SSL_,
+https://datatracker.ietf.org/doc/html/rfc7194[].

xN/xN.go

@@ -0,0 +1,279 @@
+//
+// Copyright (c) 2024, Přemysl Eric Janouch <p@janouch.name>
+//
+// Permission to use, copy, modify, and/or distribute this software for any
+// purpose with or without fee is hereby granted.
+//
+// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+// WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+// MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
+// SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+// WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
+// OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
+// CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+//
+
+// xN is a simple IRC notifier.
+package main
+
+import (
+	"bufio"
+	"bytes"
+	"crypto/tls"
+	"errors"
+	"flag"
+	"fmt"
+	"io"
+	"log"
+	"net"
+	"net/url"
+	"os"
+	"os/user"
+	"strconv"
+	"strings"
+)
+
+const projectName = "xN"
+
+var projectVersion = "?"
+
+var debugMode = false
+
+type parameters struct {
+	conn      net.Conn // underlying network connection
+	username  string   // nickname + username + realname
+	password  string   // server password
+	target    string   // where to send text
+	isuser    bool     // the target is a user rather than a channel
+	chankey   string   // channel key
+	skipjoin  bool     // whether to send external messages to channels
+	usenotice bool     // whether to use NOTICE rather than PRIVMSG
+	message   []string // lines of the message to send
+}
+
+func (p *parameters) send(command string, args ...string) error {
+	var buf bytes.Buffer
+	buf.WriteString(command)
+	for i, arg := range args {
+		buf.WriteRune(' ')
+		if i+1 == len(args) {
+			buf.WriteRune(':')
+		}
+		buf.WriteString(arg)
+	}
+	buf.WriteString("\r\n")
+	_, err := p.conn.Write(buf.Bytes())
+	return err
+}
+
+const (
+	rplWELCOME       = "001"
+	errNICKNAMEINUSE = "433"
+)
+
+func notify(p *parameters) error {
+	// The intro should comfortably fit in the TCP send buffer whole.
+	if p.password != "" {
+		p.send("PASS", p.password)
+	}
+	p.send("USER", p.username, "0", "*", p.username)
+	p.send("NICK", p.username)
+
+	scanner, nickCounter, issue := bufio.NewScanner(p.conn), 1, ""
+	for scanner.Scan() {
+		if debugMode {
+			log.Println(scanner.Text())
+		}
+
+		m := ircParseMessage(scanner.Text())
+		switch m.command {
+		case "PING":
+			p.send("PONG", m.params...)
+		case rplWELCOME:
+			if !p.isuser && !p.skipjoin {
+				if p.chankey != "" {
+					p.send("JOIN", p.target, p.chankey)
+				} else {
+					p.send("JOIN", p.target)
+				}
+			}
+			for _, line := range p.message {
+				if p.usenotice {
+					p.send("NOTICE", p.target, line)
+				} else {
+					p.send("PRIVMSG", p.target, line)
+				}
+			}
+			p.send("QUIT")
+		case errNICKNAMEINUSE:
+			p.send("NICK", fmt.Sprintf("%s%d", p.username, nickCounter))
+			nickCounter++
+		default:
+			// Prevent hanging on unsuccessful registrations.
+			numeric, _ := strconv.Atoi(m.command)
+			if numeric >= 400 && numeric <= 599 {
+				if len(m.params) > 1 {
+					issue = strings.Join(m.params[1:], " ")
+				} else {
+					issue = strings.Join(m.params, " ")
+				}
+				p.send("QUIT")
+			}
+		}
+	}
+	if err := scanner.Err(); err != nil {
+		return err
+	}
+	if issue != "" {
+		return errors.New(issue)
+	}
+	return nil
+}
+
+func parse(rawURL string, text []byte) (
+	p parameters, connect func() (net.Conn, error), err error) {
+	u, err := url.Parse(rawURL)
+	if err != nil {
+		return p, nil, err
+	} else if !u.IsAbs() || u.Opaque != "" {
+		return p, nil, errors.New("need an absolute URL")
+	} else if u.Path == "/" && u.Fragment != "" {
+		// Try to handle the common but degenerate case.
+		fragment := "%23" + u.Fragment
+		u.Fragment, u.RawFragment = "", ""
+		if u, err = url.Parse(u.String() + fragment); err != nil {
+			return p, nil, err
+		}
+	}
+
+	// Figure out registration details.
+	p.username = projectName
+	if u, _ := user.Current(); u != nil {
+		p.username = u.Username
+	}
+	if u.User.Username() != "" {
+		p.username = u.User.Username()
+	}
+
+	p.password, _ = u.User.Password()
+
+	// Figure out the target, which for our intents must accept messages.
+	path, _ := strings.CutPrefix(u.Path, "/")
+	elements := strings.Split(path, ",")
+	if path == "" || elements[0] == "" {
+		return p, nil, errors.New("unspecified entity")
+	}
+
+	// The last entity type wins.
+	p.target, p.isuser = elements[0], false
+	for _, typ := range elements[1:] {
+		switch typ {
+		case "isuser":
+			p.isuser = true
+		case "ischannel":
+			p.isuser = false
+		case "isserver":
+			// We do not support network names, and this is the default.
+		default:
+			return p, nil, errors.New("unsupported type: " + typ)
+		}
+	}
+	if p.isuser {
+		if i := strings.IndexAny(p.target, "!@"); i != -1 {
+			p.target = p.target[:i]
+		}
+	} else if !strings.HasPrefix(p.target, "#") {
+		// TODO(p): We should consult RPL_ISUPPORT rather than guess,
+		// though other prefixes are rare.
+		p.target = "#" + p.target
+	}
+
+	// Note that the draft RFC wants these to be case-insensitive.
+	p.chankey = u.Query().Get("key")
+	// Being able to skip channel join is our own requirement and invention,
+	// as are notices (names taken from Travis CI configuration).
+	p.skipjoin = u.Query().Has("skipjoin")
+	p.usenotice = u.Query().Has("usenotice")
+
+	// Ensure valid LF-separated UTF-8, and split it at lines.
+	sanitized := strings.ReplaceAll(string([]rune(string(text))), "\r", "\n")
+	for _, line := range strings.Split(sanitized, "\n") {
+		if line != "" {
+			p.message = append(p.message, line)
+		}
+	}
+
+	hostname, port := u.Hostname(), u.Port()
+	switch u.Scheme {
+	case "irc":
+		if port == "" {
+			port = "6667"
+		}
+		connect = func() (net.Conn, error) {
+			return net.Dial("tcp", net.JoinHostPort(hostname, port))
+		}
+	case "ircs":
+		if port == "" {
+			port = "6697"
+		}
+		connect = func() (net.Conn, error) {
+			return tls.Dial("tcp", net.JoinHostPort(hostname, port), nil)
+		}
+	default:
+		err = errors.New("unsupported scheme: " + u.Scheme)
+	}
+	return
+}
+
+// notifyByURL sends the given text to the IRC server specified by a URL.
+// See draft-butcher-irc-url-04.txt for the URL scheme specification
+// this function loosely follows.
+func notifyByURL(rawURL string, text []byte) error {
+	p, connect, err := parse(rawURL, text)
+	if p.conn, err = connect(); err != nil {
+		return err
+	}
+	defer p.conn.Close()
+	return notify(&p)
+}
+
+func main() {
+	flag.BoolVar(&debugMode, "debug", false, "run in verbose debug mode")
+	version := flag.Bool("version", false, "show version and exit")
+
+	flag.Usage = func() {
+		f := flag.CommandLine.Output()
+		fmt.Fprintf(f, "Usage: %s [OPTION]... URL...\n", os.Args[0])
+		flag.PrintDefaults()
+	}
+	flag.Parse()
+	if flag.NArg() < 1 {
+		flag.Usage()
+		os.Exit(2)
+	}
+
+	if *version {
+		fmt.Printf("%s %s\n", projectName, projectVersion)
+		return
+	}
+
+	text, err := io.ReadAll(os.Stdin)
+	if err != nil {
+		log.Fatalln(err)
+	}
+
+	status := 0
+	for _, rawURL := range flag.Args() {
+		if err := notifyByURL(rawURL, text); err != nil {
+			status = 1
+
+			var ue *url.Error
+			if errors.As(err, &ue) {
+				log.Println(err)
+			} else {
+				log.Printf("notify %q: %s\n", rawURL, err)
+			}
+		}
+	}
+	os.Exit(status)
+}

xN/xN_test.go

@@ -0,0 +1,98 @@
+//
+// Copyright (c) 2024, Přemysl Eric Janouch <p@janouch.name>
+//
+// Permission to use, copy, modify, and/or distribute this software for any
+// purpose with or without fee is hereby granted.
+//
+// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+// WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+// MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
+// SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+// WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
+// OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
+// CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+//
+
+package main
+
+import "testing"
+
+func TestParseURL(t *testing.T) {
+	for _, rawURL := range []string{
+		`irc:server/channel`,
+		`irc://server/channel,isnetwork`,
+		`ircs://ssl.ircnet.io`,
+		`ircs://ssl.ircnet.io/`,
+		`http://server/path`,
+	} {
+		if _, _, err := parse(rawURL, nil); err == nil {
+			t.Errorf("%q should not parse\n", rawURL)
+		}
+	}
+
+	for _, test := range []struct {
+		rawURL string
+		p      parameters
+	}{
+		{
+			rawURL: `irc://uptime@localhost/%23watch?skipjoin&usenotice`,
+			p: parameters{
+				username:  "uptime",
+				target:    "#watch",
+				skipjoin:  true,
+				usenotice: true,
+			},
+		},
+		{
+			rawURL: `ircs://ohayou@irc.libera.chat/john,isuser,isserver`,
+			p: parameters{
+				username: "ohayou",
+				target:   "john",
+				isuser:   true,
+			},
+		},
+		{
+			rawURL: `ircs://agent:Password123@irc.cia.gov:1337/#hq?key=123456`,
+			p: parameters{
+				username: "agent",
+				password: "Password123",
+				target:   "#hq",
+				chankey:  "123456",
+			},
+		},
+	} {
+		p, _, err := parse(test.rawURL, nil)
+		if err != nil {
+			t.Errorf("%q should parse, got: %s\n", test.rawURL, err)
+			continue
+		}
+		if p.username != test.p.username {
+			t.Errorf("%q: username: %v ≠ %v\n",
+				test.rawURL, p.username, test.p.username)
+		}
+		if p.password != test.p.password {
+			t.Errorf("%q: password: %v ≠ %v\n",
+				test.rawURL, p.password, test.p.password)
+		}
+		if p.target != test.p.target {
+			t.Errorf("%q: target: %v ≠ %v\n",
+				test.rawURL, p.target, test.p.target)
+		}
+		if p.isuser != test.p.isuser {
+			t.Errorf("%q: isuser: %v ≠ %v\n",
+				test.rawURL, p.isuser, test.p.isuser)
+		}
+		if p.chankey != test.p.chankey {
+			t.Errorf("%q: chankey: %v ≠ %v\n",
+				test.rawURL, p.chankey, test.p.chankey)
+		}
+		if p.skipjoin != test.p.skipjoin {
+			t.Errorf("%q: skipjoin: %v ≠ %v\n",
+				test.rawURL, p.skipjoin, test.p.skipjoin)
+		}
+		if p.usenotice != test.p.usenotice {
+			t.Errorf("%q: usenotice: %v ≠ %v\n",
+				test.rawURL, p.usenotice, test.p.usenotice)
+		}
+	}
+}

xP/Makefile

@@ -1,17 +1,20 @@
 .POSIX:
 .SUFFIXES:
+AWK = env LC_ALL=C awk
 
+tools = ../liberty/tools
 outputs = xP proto.go public/proto.js public/mithril.js
 all: $(outputs) public/ircfmt.woff2
 
 xP: xP.go proto.go
 	go build -o $@
-proto.go: ../xC-gen-proto.awk ../xC-gen-proto-go.awk ../xC-proto
-	awk -f ../xC-gen-proto.awk -f ../xC-gen-proto-go.awk ../xC-proto > $@
-public/proto.js: ../xC-gen-proto.awk ../xC-gen-proto-js.awk ../xC-proto
-	awk -f ../xC-gen-proto.awk -f ../xC-gen-proto-js.awk ../xC-proto > $@
+proto.go: $(tools)/lxdrgen.awk $(tools)/lxdrgen-go.awk ../xC.lxdr
+	$(AWK) -f $(tools)/lxdrgen.awk -f $(tools)/lxdrgen-go.awk \
+		-v PrefixCamel=Relay ../xC.lxdr > $@
+public/proto.js: $(tools)/lxdrgen.awk $(tools)/lxdrgen-mjs.awk ../xC.lxdr
+	$(AWK) -f $(tools)/lxdrgen.awk -f $(tools)/lxdrgen-mjs.awk ../xC.lxdr > $@
 public/ircfmt.woff2: gen-ircfmt.awk
-	awk -v Output=$@ -f gen-ircfmt.awk
+	$(AWK) -v Output=$@ -f gen-ircfmt.awk
 public/mithril.js:
 	curl -Lo $@ https://unpkg.com/mithril/mithril.js
 clean:

xP/public/xP.css

@@ -120,6 +120,9 @@ button:hover:active {
 .item.activity {
 	font-weight: bold;
 }
+.item:hover {
+	background: #f8f8f8;
+}
 .item.current {
 	font-style: italic;
 	background: #eee;

xP/public/xP.js

@@ -1,4 +1,4 @@
-// Copyright (c) 2022, Přemysl Eric Janouch <p@janouch.name>
+// Copyright (c) 2022 - 2023, Přemysl Eric Janouch <p@janouch.name>
 // SPDX-License-Identifier: 0BSD
 import * as Relay from './proto.js'
 
@@ -197,6 +197,14 @@ function bufferResetStats(b) {
 	b.highlighted = false
 }
 
+function bufferPopExcessLines(b) {
+	// Let "new" messages be, if only because pulling the log file
+	// is much more problematic in the web browser than in xC.
+	// TODO: Make the limit configurable, or extract general.backlog_limit.
+	const old = b.lines.length - b.newMessages - b.newUnimportantMessages
+	b.lines.splice(0, old - 1000)
+}
+
 function bufferActivate(name) {
 	rpc.send({command: 'BufferActivate', bufferName: name})
 }
@@ -288,12 +296,19 @@ rpcEventHandlers.set(Relay.Event.BufferLine, e => {
 	b.lines.push({...line})
 	if (!(visible || e.leakToActive) ||
 			b.newMessages || b.newUnimportantMessages) {
-		if (line.isUnimportant)
+		if (line.isUnimportant || e.leakToActive)
 			b.newUnimportantMessages++
 		else
 			b.newMessages++
 	}
 
+	// XXX: In its unkeyed diff algorithm, Mithril.js can only efficiently
+	// deal with common prefixes, i.e., indefinitely growing buffers.
+	// But we don't want to key all children of Buffer,
+	// so only trim buffers while they are, or once they become invisible.
+	if (e.bufferName != bufferCurrent)
+		bufferPopExcessLines(b)
+
 	if (e.leakToActive) {
 		let bc = buffers.get(bufferCurrent)
 		bc.lines.push({...line, leaked: true})
@@ -336,7 +351,7 @@ rpcEventHandlers.set(Relay.Event.BufferStats, e => {
 	if (b === undefined)
 		return
 
-	b.newMessages = e.newMessages,
+	b.newMessages = e.newMessages
 	b.newUnimportantMessages = e.newUnimportantMessages
 	b.highlighted = e.highlighted
 })
@@ -344,6 +359,11 @@ rpcEventHandlers.set(Relay.Event.BufferStats, e => {
 rpcEventHandlers.set(Relay.Event.BufferRename, e => {
 	buffers.set(e.new, buffers.get(e.bufferName))
 	buffers.delete(e.bufferName)
+
+	if (e.bufferName === bufferCurrent)
+		bufferCurrent = e.new
+	if (e.bufferName === bufferLast)
+		bufferLast = e.new
 })
 
 rpcEventHandlers.set(Relay.Event.BufferRemove, e => {
@@ -354,8 +374,16 @@ rpcEventHandlers.set(Relay.Event.BufferRemove, e => {
 
 rpcEventHandlers.set(Relay.Event.BufferActivate, e => {
 	let old = buffers.get(bufferCurrent)
-	if (old !== undefined)
+	if (old !== undefined) {
 		bufferResetStats(old)
+		bufferPopExcessLines(old)
+	}
+
+	// Initial sync: trim all buffers to our limit, just for consistency.
+	if (bufferCurrent === undefined) {
+		for (let b of buffers.values())
+			bufferPopExcessLines(b)
+	}
 
 	bufferLast = bufferCurrent
 	let b = buffers.get(e.bufferName)
@@ -387,6 +415,15 @@ rpcEventHandlers.set(Relay.Event.BufferActivate, e => {
 	}
 })
 
+rpcEventHandlers.set(Relay.Event.BufferInput, e => {
+	let b = buffers.get(e.bufferName)
+	if (b === undefined)
+		return
+	if (b.historyAt == b.history.length)
+		b.historyAt++
+	b.history.push(e.text)
+})
+
 rpcEventHandlers.set(Relay.Event.BufferClear, e => {
 	let b = buffers.get(e.bufferName)
 	if (b !== undefined)
@@ -453,14 +490,23 @@ let BufferList = {
 				classes.push('highlighted')
 				highlighted = true
 			}
-			return m('.item', {
+			// The role makes it selectable in VIM-like browser extensions.
+			return m('.item[role=tab]', {
 				onclick: event => bufferActivate(name),
+				onauxclick: event => {
+					if (event.button == 1)
+						rpc.send({
+							command: 'BufferInput',
+							bufferName: name,
+							text: '/buffer close',
+						})
+				},
 				class: classes.join(' '),
 			}, displayName)
 		})
 
 		updateIcon(rpc.ws === undefined ? null : highlighted)
-		return m('.list', {}, items)
+		return m('.list[role=tablist]', {}, items)
 	},
 }
 
@@ -483,7 +529,8 @@ let Content = {
 		while ((match = re.exec(text)) !== null) {
 			if (end < match.index)
 				a.push(m('span', attrs, text.substring(end, match.index)))
-			a.push(m('a[target=_blank]', {href: match[0], ...attrs}, match[0]))
+			a.push(m('a[target=_blank][rel=noreferrer]',
+				{href: match[0], ...attrs}, match[0]))
 			end = re.lastIndex
 		}
 		if (end < text.length)
@@ -566,12 +613,6 @@ let Topic = {
 }
 
 let Buffer = {
-	controller: new AbortController(),
-
-	onbeforeremove: vnode => {
-		Buffer.controller.abort()
-	},
-
 	onupdate: vnode => {
 		if (bufferAutoscroll)
 			vnode.dom.scrollTop = vnode.dom.scrollHeight
@@ -579,8 +620,28 @@ let Buffer = {
 
 	oncreate: vnode => {
 		Buffer.onupdate(vnode)
+
+		vnode.state.controller = new AbortController()
 		window.addEventListener('resize', event => Buffer.onupdate(vnode),
-			{signal: Buffer.controller.signal})
+			{signal: vnode.state.controller.signal})
+
+		Buffer.setDateChangeTimeout(vnode)
+	},
+
+	onremove: vnode => {
+		vnode.state.controller.abort()
+		clearTimeout(vnode.state.dateChangeTimeout)
+	},
+
+	setDateChangeTimeout: vnode => {
+		let midnight = new Date()
+		midnight.setHours(24, 0, 0, 0)
+
+		// Note that this doesn't handle time zone changes correctly.
+		vnode.state.dateChangeTimeout = setTimeout(() => {
+			m.redraw()
+			Buffer.setDateChangeTimeout(vnode)
+		}, midnight - new Date())
 	},
 
 	view: vnode => {
@@ -632,6 +693,12 @@ let Buffer = {
 			const dom = event.target
 			bufferAutoscroll =
 				dom.scrollTop + dom.clientHeight + 1 >= dom.scrollHeight
+
+			let b = buffers.get(bufferCurrent)
+			if (b !== undefined && b.highlighted && !bufferAutoscroll) {
+				b.highlighted = false
+				m.redraw()
+			}
 		}}, lines)
 	},
 }
@@ -647,7 +714,8 @@ let Log = {
 		while ((match = re.exec(text)) !== null) {
 			if (end < match.index)
 				a.push(text.substring(end, match.index))
-			a.push(m('a[target=_blank]', {href: match[0]}, match[0]))
+			a.push(m('a[target=_blank][rel=noreferrer]',
+				{href: match[0]}, match[0]))
 			end = re.lastIndex
 		}
 		if (end < text.length)
@@ -935,7 +1003,7 @@ let Input = {
 		rpc.send({command: 'Active'})
 
 		let b = buffers.get(bufferCurrent)
-		if (b === undefined)
+		if (b === undefined || event.isComposing)
 			return
 
 		let textarea = event.currentTarget
@@ -981,10 +1049,23 @@ let Input = {
 		} else if (!event.altKey && !event.ctrlKey && !event.metaKey &&
 				!event.shiftKey) {
 			handled = true
-			switch (event.keyCode) {
-			case 9:   success = Input.complete(b, textarea); break
-			case 13:  success = Input.submit(b, textarea);   break
-			default:  handled = false
+			switch (event.key) {
+			case 'PageUp':
+				Array.from(document.getElementsByClassName('buffer'))
+					.forEach(b => b.scrollBy(0, -b.clientHeight))
+				break
+			case 'PageDown':
+				Array.from(document.getElementsByClassName('buffer'))
+					.forEach(b => b.scrollBy(0, +b.clientHeight))
+				break
+			case 'Tab':
+				success = Input.complete(b, textarea);
+				break
+			case 'Enter':
+				success = Input.submit(b, textarea);
+				break
+			default:
+				handled = false
 			}
 		}
 		if (!success)
@@ -1049,6 +1130,13 @@ let lastWasEscape = false
 document.addEventListener('keydown', event => {
 	event.escapePrefix = lastWasEscape
 	if (lastWasEscape) {
+		// https://www.w3.org/TR/uievents-key/#keys-modifier
+		// https://bugzilla.mozilla.org/show_bug.cgi?id=1232918
+		if (["Alt", "AltGraph", "CapsLock", "Control", "Fn", "FnLock",
+			"Meta", "NumLock", "ScrollLock", "Shift", "Symbol", "SymbolLock",
+			"Hyper", "Super", "OS"].indexOf(event.key) != -1)
+			return
+
 		lastWasEscape = false
 	} else if (event.code == 'Escape' &&
 			navigator.userAgentData?.platform === 'macOS') {

xP/xP.go

@@ -16,6 +16,7 @@ import (
 	"net"
 	"net/http"
 	"os"
+	"strings"
 	"time"
 
 	"nhooyr.io/websocket"
@@ -159,13 +160,21 @@ func clientWriteError(ctx context.Context, ws *websocket.Conn, err error) bool {
 }
 
 func handleWS(w http.ResponseWriter, r *http.Request) {
-	ws, err := websocket.Accept(w, r, &websocket.AcceptOptions{
+	opts := &websocket.AcceptOptions{
 		InsecureSkipVerify: true,
-		// Note that Safari can be broken with compression.
-		CompressionMode: websocket.CompressionContextTakeover,
+		CompressionMode:    websocket.CompressionContextTakeover,
 		// This is for the payload; set higher to avoid overhead.
 		CompressionThreshold: 64 << 10,
-	})
+	}
+
+	// AppleWebKit can be broken with compression.
+	if agent := r.UserAgent(); strings.Contains(agent, " Version/") &&
+		(strings.HasPrefix(agent, "Mozilla/5.0 (Macintosh; ") ||
+			strings.HasPrefix(agent, "Mozilla/5.0 (iPhone; ")) {
+		opts.CompressionMode = websocket.CompressionDisabled
+	}
+
+	ws, err := websocket.Accept(w, r, opts)
 	if err != nil {
 		log.Println("Client rejected: " + err.Error())
 		return
@@ -295,5 +304,5 @@ func main() {
 		WriteTimeout:   60 * time.Second,
 		MaxHeaderBytes: 32 << 10,
 	}
-	log.Fatal(s.ListenAndServe())
+	log.Fatalln(s.ListenAndServe())
 }

xS/.gitignore

@@ -0,0 +1,3 @@
+/xS
+/xS-replies.go
+/xS.1

xS/Makefile

@@ -0,0 +1,18 @@
+.POSIX:
+.SUFFIXES:
+AWK = env LC_ALL=C awk
+
+outputs = xS xS-replies.go xS.1
+all: $(outputs)
+
+xS: xS.go ../xK-version xS-replies.go
+	go build -ldflags "-X 'main.projectVersion=$$(cat ../xK-version)'" -o $@
+xS-replies.go: xS-gen-replies.awk xS-replies
+	$(AWK) -f xS-gen-replies.awk xS-replies > $@
+xS.1: ../xK-version ../liberty/tools/asciiman.awk xS.adoc
+	env "asciidoc-release-version=$$(cat ../xK-version)" \
+		$(AWK) -f ../liberty/tools/asciiman.awk xS.adoc > $@
+test: all
+	go test
+clean:
+	rm -f $(outputs)

xS/go.mod

@@ -0,0 +1,3 @@
+module janouch.name/xK/xS
+
+go 1.19

xS/irc.go

@@ -0,0 +1,132 @@
+package main
+
+import (
+	"path/filepath"
+	"regexp"
+	"strings"
+)
+
+func ircToLower(c byte) byte {
+	switch c {
+	case '[':
+		return '{'
+	case ']':
+		return '}'
+	case '\\':
+		return '|'
+	case '~':
+		return '^'
+	}
+	if c >= 'A' && c <= 'Z' {
+		return c + ('a' - 'A')
+	}
+	return c
+}
+
+func ircToUpper(c byte) byte {
+	switch c {
+	case '{':
+		return '['
+	case '}':
+		return ']'
+	case '|':
+		return '\\'
+	case '^':
+		return '~'
+	}
+	if c >= 'a' && c <= 'z' {
+		return c - ('a' - 'A')
+	}
+	return c
+}
+
+// Convert identifier to a canonical form for case-insensitive comparisons.
+// ircToUpper is used so that statically initialized maps can be in uppercase.
+func ircToCanon(ident string) string {
+	var canon []byte
+	for _, c := range []byte(ident) {
+		canon = append(canon, ircToUpper(c))
+	}
+	return string(canon)
+}
+
+func ircEqual(s1, s2 string) bool {
+	return ircToCanon(s1) == ircToCanon(s2)
+}
+
+func ircFnmatch(pattern string, s string) bool {
+	pattern, s = ircToCanon(pattern), ircToCanon(s)
+	// FIXME: This should not support [] ranges and handle '/' specially.
+	// We could translate the pattern to a regular expression.
+	matched, _ := filepath.Match(pattern, s)
+	return matched
+}
+
+var reMsg = regexp.MustCompile(
+	`^(?:@([^ ]*) +)?(?::([^! ]*)(?:!([^@]*)@([^ ]*))? +)?([^ ]+)(.*)?$`)
+var reArgs = regexp.MustCompile(`:.*| [^: ][^ ]*`)
+
+type message struct {
+	tags    map[string]string // IRC 3.2 message tags
+	nick    string            // optional nickname
+	user    string            // optional username
+	host    string            // optional hostname or IP address
+	command string            // command name
+	params  []string          // arguments
+}
+
+func ircUnescapeMessageTag(value string) string {
+	var buf []byte
+	escape := false
+	for i := 0; i < len(value); i++ {
+		if escape {
+			switch value[i] {
+			case ':':
+				buf = append(buf, ';')
+			case 's':
+				buf = append(buf, ' ')
+			case 'r':
+				buf = append(buf, '\r')
+			case 'n':
+				buf = append(buf, '\n')
+			default:
+				buf = append(buf, value[i])
+			}
+			escape = false
+		} else if value[i] == '\\' {
+			escape = true
+		} else {
+			buf = append(buf, value[i])
+		}
+	}
+	return string(buf)
+}
+
+func ircParseMessageTags(tags string, out map[string]string) {
+	for _, tag := range strings.Split(tags, ";") {
+		if tag == "" {
+			// Ignore empty.
+		} else if equal := strings.IndexByte(tag, '='); equal < 0 {
+			out[tag] = ""
+		} else {
+			out[tag[:equal]] = ircUnescapeMessageTag(tag[equal+1:])
+		}
+	}
+}
+
+func ircParseMessage(line string) *message {
+	m := reMsg.FindStringSubmatch(line)
+	if m == nil {
+		return nil
+	}
+
+	msg := message{nil, m[2], m[3], m[4], m[5], nil}
+	if m[1] != "" {
+		msg.tags = make(map[string]string)
+		ircParseMessageTags(m[1], msg.tags)
+	}
+	for _, x := range reArgs.FindAllString(m[6], -1) {
+		msg.params = append(msg.params, x[1:])
+	}
+	return &msg
+}

xS/xS-gen-replies.awk

@@ -0,0 +1,20 @@
+#!/usr/bin/awk -f
+/^[0-9]+ *(ERR|RPL)_[A-Z]+ *".*"$/ {
+	match($0, /".*"/)
+	ids[$1] = $2
+	texts[$2] = substr($0, RSTART, RLENGTH)
+}
+
+END {
+	print "package main"
+	print ""
+	print "const ("
+	for (i in ids)
+		printf("\t%s = %s\n", ids[i], i)
+	print ")"
+	print ""
+	print "var defaultReplies = map[int]string{"
+	for (i in ids)
+		print "\t" ids[i] ": " texts[ids[i]] ","
+	print "}"
+}

xS/xS-replies

@@ -0,0 +1,87 @@
+1 RPL_WELCOME ":Welcome to the Internet Relay Network %s!%s@%s"
+2 RPL_YOURHOST ":Your host is %s, running version %s"
+3 RPL_CREATED ":This server was created %s"
+4 RPL_MYINFO "%s %s %s %s"
+5 RPL_ISUPPORT "%s :are supported by this server"
+211 RPL_STATSLINKINFO "%s %d %d %d %d %d %d"
+212 RPL_STATSCOMMANDS "%s %d %d %d"
+219 RPL_ENDOFSTATS "%c :End of STATS report"
+221 RPL_UMODEIS "+%s"
+242 RPL_STATSUPTIME ":Server Up %d days %d:%02d:%02d"
+251 RPL_LUSERCLIENT ":There are %d users and %d services on %d servers"
+252 RPL_LUSEROP "%d :operator(s) online"
+253 RPL_LUSERUNKNOWN "%d :unknown connection(s)"
+254 RPL_LUSERCHANNELS "%d :channels formed"
+255 RPL_LUSERME ":I have %d clients and %d servers"
+301 RPL_AWAY "%s :%s"
+302 RPL_USERHOST ":%s"
+303 RPL_ISON ":%s"
+305 RPL_UNAWAY ":You are no longer marked as being away"
+306 RPL_NOWAWAY ":You have been marked as being away"
+311 RPL_WHOISUSER "%s %s %s * :%s"
+312 RPL_WHOISSERVER "%s %s :%s"
+313 RPL_WHOISOPERATOR "%s :is an IRC operator"
+314 RPL_WHOWASUSER "%s %s %s * :%s"
+315 RPL_ENDOFWHO "%s :End of WHO list"
+317 RPL_WHOISIDLE "%s %d :seconds idle"
+318 RPL_ENDOFWHOIS "%s :End of WHOIS list"
+319 RPL_WHOISCHANNELS "%s :%s"
+322 RPL_LIST "%s %d :%s"
+323 RPL_LISTEND ":End of LIST"
+324 RPL_CHANNELMODEIS "%s +%s"
+329 RPL_CREATIONTIME "%s %d"
+331 RPL_NOTOPIC "%s :No topic is set"
+332 RPL_TOPIC "%s :%s"
+333 RPL_TOPICWHOTIME "%s %s %d"
+341 RPL_INVITING "%s %s"
+346 RPL_INVITELIST "%s %s"
+347 RPL_ENDOFINVITELIST "%s :End of channel invite list"
+348 RPL_EXCEPTLIST "%s %s"
+349 RPL_ENDOFEXCEPTLIST "%s :End of channel exception list"
+351 RPL_VERSION "%s.%d %s :%s"
+352 RPL_WHOREPLY "%s %s %s %s %s %s :%d %s"
+353 RPL_NAMREPLY "%c %s :%s"
+364 RPL_LINKS "%s %s :%d %s"
+365 RPL_ENDOFLINKS "%s :End of LINKS list"
+366 RPL_ENDOFNAMES "%s :End of NAMES list"
+367 RPL_BANLIST "%s %s"
+368 RPL_ENDOFBANLIST "%s :End of channel ban list"
+369 RPL_ENDOFWHOWAS "%s :End of WHOWAS"
+372 RPL_MOTD ":- %s"
+375 RPL_MOTDSTART ":- %s Message of the day - "
+376 RPL_ENDOFMOTD ":End of MOTD command"
+391 RPL_TIME "%s :%s"
+401 ERR_NOSUCHNICK "%s :No such nick/channel"
+402 ERR_NOSUCHSERVER "%s :No such server"
+403 ERR_NOSUCHCHANNEL "%s :No such channel"
+404 ERR_CANNOTSENDTOCHAN "%s :Cannot send to channel"
+406 ERR_WASNOSUCHNICK "%s :There was no such nickname"
+409 ERR_NOORIGIN ":No origin specified"
+410 ERR_INVALIDCAPCMD "%s :%s"
+411 ERR_NORECIPIENT ":No recipient given (%s)"
+412 ERR_NOTEXTTOSEND ":No text to send"
+421 ERR_UNKNOWNCOMMAND "%s: Unknown command"
+422 ERR_NOMOTD ":MOTD File is missing"
+423 ERR_NOADMININFO "%s :No administrative info available"
+431 ERR_NONICKNAMEGIVEN ":No nickname given"
+432 ERR_ERRONEOUSNICKNAME "%s :Erroneous nickname"
+433 ERR_NICKNAMEINUSE "%s :Nickname is already in use"
+441 ERR_USERNOTINCHANNEL "%s %s :They aren't on that channel"
+442 ERR_NOTONCHANNEL "%s :You're not on that channel"
+443 ERR_USERONCHANNEL "%s %s :is already on channel"
+445 ERR_SUMMONDISABLED ":SUMMON has been disabled"
+446 ERR_USERSDISABLED ":USERS has been disabled"
+451 ERR_NOTREGISTERED ":You have not registered"
+461 ERR_NEEDMOREPARAMS "%s :Not enough parameters"
+462 ERR_ALREADYREGISTERED ":Unauthorized command (already registered)"
+467 ERR_KEYSET "%s :Channel key already set"
+471 ERR_CHANNELISFULL "%s :Cannot join channel (+l)"
+472 ERR_UNKNOWNMODE "%c :is unknown mode char to me for %s"
+473 ERR_INVITEONLYCHAN "%s :Cannot join channel (+i)"
+474 ERR_BANNEDFROMCHAN "%s :Cannot join channel (+b)"
+475 ERR_BADCHANNELKEY "%s :Cannot join channel (+k)"
+476 ERR_BADCHANMASK "%s :Bad Channel Mask"
+481 ERR_NOPRIVILEGES ":Permission Denied- You're not an IRC operator"
+482 ERR_CHANOPRIVSNEEDED "%s :You're not channel operator"
+501 ERR_UMODEUNKNOWNFLAG ":Unknown MODE flag"
+502 ERR_USERSDONTMATCH ":Cannot change mode for other users"

xS/xS.adoc

@@ -0,0 +1,57 @@
+xS(1)
+=====
+:doctype: manpage
+:manmanual: xK Manual
+:mansource: xK {release-version}
+
+Name
+----
+xS - IRC daemon
+
+Synopsis
+--------
+*xS* [_OPTION_]...
+
+Description
+-----------
+*xS* is a basic IRC daemon for single-server networks, suitable for testing
+and private use.  When run without a configuration file, it will start listening
+on the standard port 6667 and the "any" address.
+
+Options
+-------
+*-debug*::
+	Do not daemonize, print more information on the standard error stream
+	to help debug various issues.
+
+*-systemd*::
+	Log using the format specified in *sd-daemon*(3).
+
+*-h*, *-help*::
+	Display a help message and exit.
+
+*-version*::
+	Output version information and exit.
+
+*-writedefaultcfg*::
+	Write a configuration file with defaults, show its path and exit.
++
+The file will be appropriately commented.
+
+Files
+-----
+*xS* follows the XDG Base Directory Specification.
+
+_~/.config/xS/xS.conf_::
+_/etc/xdg/xS/xS.conf_::
+	The daemon's configuration file.  Use the *-writedefaultcfg* option
+	to create a new one for editing.
+
+Reporting bugs
+--------------
+Use https://git.janouch.name/p/xK to report bugs, request features,
+or submit pull requests.
+
+See also
+--------
+*sd-daemon*(3)

xS/xS_test.go

@@ -0,0 +1,168 @@
+//
+// Copyright (c) 2015 - 2018, Přemysl Eric Janouch <p@janouch.name>
+//
+// Permission to use, copy, modify, and/or distribute this software for any
+// purpose with or without fee is hereby granted.
+//
+// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+// WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+// MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
+// SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+// WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
+// OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
+// CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+//
+
+package main
+
+import (
+	"crypto/tls"
+	"net"
+	"os"
+	"reflect"
+	"syscall"
+	"testing"
+)
+
+func TestSplitString(t *testing.T) {
+	var splitStringTests = []struct {
+		s, delims   string
+		ignoreEmpty bool
+		result      []string
+	}{
+		{",a,,bc", ",", false, []string{"", "a", "", "bc"}},
+		{",a,,bc", ",", true, []string{"a", "bc"}},
+		{"a,;bc,", ",;", false, []string{"a", "", "bc", ""}},
+		{"a,;bc,", ",;", true, []string{"a", "bc"}},
+		{"", ",", false, []string{""}},
+		{"", ",", true, nil},
+	}
+
+	for i, d := range splitStringTests {
+		got := splitString(d.s, d.delims, d.ignoreEmpty)
+		if !reflect.DeepEqual(got, d.result) {
+			t.Errorf("case %d: %v should be %v\n", i, got, d.result)
+		}
+	}
+}
+
+func socketpair() (*os.File, *os.File, error) {
+	pair, err := syscall.Socketpair(syscall.AF_UNIX, syscall.SOCK_STREAM, 0)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	// See go #24331, this makes 1.11 use the internal poller
+	// while there wasn't a way to achieve that before.
+	if err := syscall.SetNonblock(int(pair[0]), true); err != nil {
+		return nil, nil, err
+	}
+	if err := syscall.SetNonblock(int(pair[1]), true); err != nil {
+		return nil, nil, err
+	}
+
+	fa := os.NewFile(uintptr(pair[0]), "a")
+	if fa == nil {
+		return nil, nil, os.ErrInvalid
+	}
+
+	fb := os.NewFile(uintptr(pair[1]), "b")
+	if fb == nil {
+		fa.Close()
+		return nil, nil, os.ErrInvalid
+	}
+
+	return fa, fb, nil
+}
+
+func TestDetectTLS(t *testing.T) {
+	detectTLSFromFunc := func(t *testing.T, writer func(net.Conn)) bool {
+		// net.Pipe doesn't use file descriptors, we need a socketpair.
+		sockA, sockB, err := socketpair()
+		if err != nil {
+			t.Fatal(err)
+		}
+		defer sockA.Close()
+		defer sockB.Close()
+
+		fcB, err := net.FileConn(sockB)
+		if err != nil {
+			t.Fatal(err)
+		}
+		go writer(fcB)
+
+		fcA, err := net.FileConn(sockA)
+		if err != nil {
+			t.Fatal(err)
+		}
+		sc, err := fcA.(syscall.Conn).SyscallConn()
+		if err != nil {
+			t.Fatal(err)
+		}
+		return detectTLS(sc)
+	}
+
+	t.Run("SSL_2.0", func(t *testing.T) {
+		if !detectTLSFromFunc(t, func(fc net.Conn) {
+			// The obsolete, useless, unsupported SSL 2.0 record format.
+			_, _ = fc.Write([]byte{0x80, 0x01, 0x01})
+		}) {
+			t.Error("could not detect SSL")
+		}
+	})
+	t.Run("crypto_tls", func(t *testing.T) {
+		if !detectTLSFromFunc(t, func(fc net.Conn) {
+			conn := tls.Client(fc, &tls.Config{InsecureSkipVerify: true})
+			_ = conn.Handshake()
+		}) {
+			t.Error("could not detect TLS")
+		}
+	})
+	t.Run("text", func(t *testing.T) {
+		if detectTLSFromFunc(t, func(fc net.Conn) {
+			_, _ = fc.Write([]byte("ПРЕВЕД"))
+		}) {
+			t.Error("detected UTF-8 as TLS")
+		}
+	})
+	t.Run("EOF", func(t *testing.T) {
+		type connCloseWriter interface {
+			net.Conn
+			CloseWrite() error
+		}
+		if detectTLSFromFunc(t, func(fc net.Conn) {
+			_ = fc.(connCloseWriter).CloseWrite()
+		}) {
+			t.Error("detected EOF as TLS")
+		}
+	})
+}
+
+func TestIRC(t *testing.T) {
+	msg := ircParseMessage(
+		`@first=a\:\s\r\n\\;2nd :srv hi there :good m8 :how are you?`)
+
+	if !reflect.DeepEqual(msg.tags, map[string]string{
+		"first": "a; \r\n\\",
+		"2nd":   "",
+	}) {
+		t.Error("tags parsed incorrectly")
+	}
+
+	if msg.nick != "srv" || msg.user != "" || msg.host != "" {
+		t.Error("server name parsed incorrectly")
+	}
+	if msg.command != "hi" {
+		t.Error("command name parsed incorrectly")
+	}
+	if !reflect.DeepEqual(msg.params,
+		[]string{"there", "good m8 :how are you?"}) {
+		t.Error("params parsed incorrectly")
+	}
+
+	if !ircEqual("[fag]^", "{FAG}~") {
+		t.Error("string case comparison not according to RFC 2812")
+	}
+
+	// TODO: More tests.
+}

xW/.clang-format

@@ -0,0 +1,11 @@
+BasedOnStyle: LLVM
+ColumnLimit: 80
+IndentWidth: 4
+TabWidth: 4
+UseTab: ForContinuationAndIndentation
+AlwaysBreakAfterReturnType: AllDefinitions
+BreakBeforeBraces: Linux
+SpaceAfterCStyleCast: true
+AlignAfterOpenBracket: DontAlign
+AlignOperands: DontAlign
+SpacesBeforeTrailingComments: 2

xW/CMakeLists.txt

@@ -0,0 +1,85 @@
+# The last version with Windows XP support is 3.13, we want to keep that
+cmake_minimum_required (VERSION 3.10)
+
+file (READ ../xK-version project_version)
+configure_file (../xK-version xK-version.tag COPYONLY)
+string (STRIP "${project_version}" project_version)
+
+# This is an entirely separate CMake project--the main executables only build
+# on Windows within Cygwin, and this Windows executable only builds on Linux
+# cross-compiled, so you'd want to build them independently anyway.
+project (xW VERSION "${project_version}"
+	DESCRIPTION "Win32 frontend for xC" LANGUAGES CXX)
+
+set (CMAKE_CXX_STANDARD 17)
+
+add_definitions (-DUNICODE -D_UNICODE)
+add_compile_options ("$<$<CXX_COMPILER_ID:MSVC>:/utf-8>")
+add_compile_options ("$<$<CXX_COMPILER_ID:GNU>:-Wall;-Wextra>")
+add_compile_options ("$<$<CXX_COMPILER_ID:Clang>:-Wall;-Wextra>")
+add_link_options ("$<$<CXX_COMPILER_ID:GNU>:-static;-municode>")
+add_link_options ("$<$<CXX_COMPILER_ID:Clang>:-static;-municode>")
+
+set (project_config ${PROJECT_BINARY_DIR}/config.h)
+configure_file (${PROJECT_SOURCE_DIR}/config.h.in ${project_config})
+include_directories (${PROJECT_SOURCE_DIR} ${PROJECT_BINARY_DIR})
+
+# Produce a beep sample
+if (NOT ${CMAKE_VERSION} VERSION_LESS 3.18.0)
+	set (find_program_REQUIRE REQUIRED)
+endif ()
+
+find_program (sox_EXECUTABLE sox ${find_program_REQUIRE})
+add_custom_command (OUTPUT beep.wav
+	COMMAND ${sox_EXECUTABLE} -b 16 -Dr 44100 -n beep.wav
+		synth 0.1 0 25 triangle 800 vol 0.5 fade t 0 -0 0.005 pad 0 0.05
+	COMMENT "Generating a beep sample" VERBATIM)
+
+# Rasterize SVG icons
+set (root "${PROJECT_SOURCE_DIR}/..")
+set (CMAKE_MODULE_PATH ${root}/liberty/cmake)
+include (IconUtils)
+
+set (icon_ico_list)
+foreach (icon xW xW-highlighted)
+	set (icon_png_list)
+	foreach (icon_size 16 32 48)
+		icon_to_png (${icon} ${PROJECT_SOURCE_DIR}/${icon}.svg
+			${icon_size} ${PROJECT_BINARY_DIR}/icons icon_png)
+		list (APPEND icon_png_list ${icon_png})
+	endforeach ()
+	icon_to_png (${icon} ${PROJECT_SOURCE_DIR}/${icon}.svg
+		256 ${PROJECT_BINARY_DIR}/icons icon_png)
+
+	set (icon_ico ${PROJECT_BINARY_DIR}/${icon}.ico)
+	icon_for_win32 (${icon_ico} "${icon_png_list}" "${icon_png}")
+	list (APPEND icon_ico_list ${icon_ico})
+endforeach ()
+
+set_property (SOURCE xW.rc
+	APPEND PROPERTY OBJECT_DEPENDS ${icon_ico_list} beep.wav)
+
+# Build the main executable and link it
+find_program (awk_EXECUTABLE awk ${find_program_REQUIRE})
+add_custom_command (OUTPUT xC-proto.cpp
+	COMMAND ${CMAKE_COMMAND} -E env LC_ALL=C ${awk_EXECUTABLE}
+		-f ${root}/liberty/tools/lxdrgen.awk
+		-f ${root}/liberty/tools/lxdrgen-cpp.awk
+		-v PrefixCamel=Relay
+		${root}/xC.lxdr > xC-proto.cpp
+	DEPENDS
+		${root}/liberty/tools/lxdrgen.awk
+		${root}/liberty/tools/lxdrgen-cpp.awk
+		${root}/xC.lxdr
+	COMMENT "Generating xC relay protocol code" VERBATIM)
+add_custom_target (xC-proto DEPENDS ${PROJECT_BINARY_DIR}/xC-proto.cpp)
+
+add_executable (xW WIN32 xW.cpp xW.rc xW.manifest ${project_config}
+	${root}/liberty/tools/lxdrgen-cpp-win32.cpp)
+target_link_libraries (xW comctl32 ws2_32 winmm)
+add_dependencies (xW xC-proto)
+
+# At least with MinGW, this is a fully independent portable executable
+install (TARGETS xW DESTINATION .)
+set (CPACK_GENERATOR ZIP)
+include (CPack)

xW/config.h.in

@@ -0,0 +1,14 @@
+#ifndef CONFIG_H
+#define CONFIG_H
+
+#define PROJECT_NAME        "${PROJECT_NAME}"
+#define PROJECT_VERSION     "${project_version}"
+#define PROJECT_DESCRIPTION "${PROJECT_DESCRIPTION}"
+#define PROJECT_AUTHOR      "Přemysl Eric Janouch"
+
+#define PROJECT_MAJOR       (${PROJECT_VERSION_MAJOR}-0)
+#define PROJECT_MINOR       (${PROJECT_VERSION_MINOR}-0)
+#define PROJECT_PATCH       (${PROJECT_VERSION_PATCH}-0)
+#define PROJECT_TWEAK       (${PROJECT_VERSION_TWEAK}-0)
+
+#endif  // ! CONFIG_H

xW/xW-highlighted.svg

@@ -0,0 +1,24 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<svg version="1.1" width="48" height="48" viewBox="0 0 48 48"
+   xmlns="http://www.w3.org/2000/svg">
+
+  <defs>
+    <clipPath id="outer">
+      <rect x="-1" y="-0.15" width="5" height="3.30" />
+    </clipPath>
+    <clipPath id="inner">
+      <rect x="-1" y="0" width="5" height="3" />
+    </clipPath>
+  </defs>
+
+  <g transform="translate(6, 6) scale(12)" stroke-linecap="square">
+    <g clip-path="url(#outer)">
+      <path stroke="#ffffff" stroke-width="1.5" d="M 0.5,0 2.5,3" />
+      <path stroke="#ffffff" stroke-width="1.5" d="M 0.5,3 2.5,0" />
+    </g>
+    <g clip-path="url(#inner)">
+      <path stroke="#ff0000" stroke-width="0.9" d="M 0.5,0 2.5,3" />
+      <path stroke="#ff0000" stroke-width="0.9" d="M 0.5,3 2.5,0" />
+    </g>
+  </g>
+</svg>

xW/xW-resources.h

@@ -0,0 +1,18 @@
+#define IDI_ICON                1
+#define IDI_HIGHLIGHTED         2
+#define IDR_BEEP                3
+#define IDA_ACCELERATORS       10
+
+// Named after input_add_functions() in xC.
+#define ID_PREVIOUS_BUFFER     11
+#define ID_NEXT_BUFFER         12
+#define ID_SWITCH_BUFFER       13
+#define ID_GOTO_HIGHLIGHT      14
+#define ID_GOTO_ACTIVITY       15
+#define ID_TOGGLE_UNIMPORTANT  16
+#define ID_DISPLAY_FULL_LOG    17
+
+#define IDD_CONNECT            20
+#define IDC_STATIC             21
+#define IDC_HOST               22
+#define IDC_PORT               23

xW/xW.manifest

@@ -0,0 +1,25 @@
+<?xml version="1.0" encoding="UTF-8" standalone="yes" ?>
+<assembly xmlns="urn:schemas-microsoft-com:asm.v1" manifestVersion="1.0">
+	<assemblyIdentity name="xW" version="1.0.0.0" type="win32" />
+	<dependency>
+		<dependentAssembly>
+			<assemblyIdentity name="Microsoft.Windows.Common-Controls"
+				version="6.0.0.0" type="win32" processorArchitecture="*"
+				publicKeyToken="6595b64144ccf1df" language="*" />
+		</dependentAssembly>
+	</dependency>
+	<compatibility xmlns="urn:schemas-microsoft-com:compatibility.v1">
+		<application>
+			<!-- Windows 10 -->
+			<supportedOS Id="{8e0f7a12-bfb3-4fe8-b9a5-48fd50a15a9a}" />
+			<!-- Windows 8.1 -->
+			<supportedOS Id="{1f676c76-80e1-4239-95bb-83d0f6d0da78}" />
+			<!-- Windows 8 -->
+			<supportedOS Id="{4a2f28e3-53b9-4441-ba9c-d69d4a4a6e38}" />
+			<!-- Windows 7 -->
+			<supportedOS Id="{35138b9a-5d96-4fbd-8e2d-a2440225f93a}" />
+			<!-- Windows Vista -->
+			<supportedOS Id="{e2011457-1546-43c5-a5fe-008deee3d3f0}" />
+		</application>
+	</compatibility>
+</assembly>

xW/xW.rc

@@ -0,0 +1,80 @@
+#include <windows.h>
+#include "xW-resources.h"
+
+// https://devblogs.microsoft.com/oldnewthing/20190607-00/?p=102569
+// For UTF-8 literals to work in both MinGW and Microsoft resource compilers,
+// the pragma needs to be in this file, and before they're included.
+#pragma code_page(65001)
+#include "config.h"
+
+// Beware of this madness https://gitlab.kitware.com/cmake/cmake/-/issues/23066
+CREATEPROCESS_MANIFEST_RESOURCE_ID RT_MANIFEST "xW.manifest"
+
+IDI_ICON ICON "xW.ico"
+IDI_HIGHLIGHTED ICON "xW-highlighted.ico"
+IDR_BEEP WAVE "beep.wav"
+
+IDA_ACCELERATORS ACCELERATORS
+BEGIN
+	"^p",     ID_PREVIOUS_BUFFER
+	"^n",     ID_NEXT_BUFFER
+	VK_F5,    ID_PREVIOUS_BUFFER,             VIRTKEY
+	VK_F6,    ID_NEXT_BUFFER,                 VIRTKEY
+	VK_PRIOR, ID_PREVIOUS_BUFFER,    CONTROL, VIRTKEY
+	VK_NEXT,  ID_NEXT_BUFFER,        CONTROL, VIRTKEY
+	VK_TAB,   ID_SWITCH_BUFFER,      CONTROL, VIRTKEY
+	// These are proper, but llvm-rc won't accept them (GitHub #64002).
+#ifndef __clang__
+	"!",      ID_GOTO_HIGHLIGHT,     ALT
+	"a",      ID_GOTO_ACTIVITY,      ALT
+	"H",      ID_TOGGLE_UNIMPORTANT, ALT
+	"h",      ID_DISPLAY_FULL_LOG,   ALT
+#endif
+END
+
+// https://devblogs.microsoft.com/oldnewthing/20050204-00/?p=36523
+// https://devblogs.microsoft.com/oldnewthing/20050207-00/?p=36513
+//
+// Note that this is still not the right font to use in newest Windows,
+// that would be 9pt Segoe UI, as described in:
+// https://learn.microsoft.com/en-us/windows/win32/uxguide/vis-fonts
+// or even better yet, NONCLIENTMETRICS::lfMessageFont.
+IDD_CONNECT DIALOGEX 0, 0, 150, 64
+STYLE DS_SHELLFONT | DS_MODALFRAME | DS_CENTER \
+	| WS_POPUP | WS_CAPTION | WS_SYSMENU
+CAPTION "Connect to Relay"
+FONT 8, "MS Shell Dlg", 400 /*FW_NORMAL*/, 0 /*FALSE*/, 0x1 /*DEFAULT_CHARSET*/
+BEGIN
+	LTEXT         "&Host:",   IDC_STATIC, 7, 10,  18,  8
+	EDITTEXT                  IDC_HOST,  39,  7, 104, 14, ES_AUTOHSCROLL
+	LTEXT         "&Port:",   IDC_STATIC, 7, 28,  18,  8
+	EDITTEXT                  IDC_PORT,  39, 25, 104, 14, ES_AUTOHSCROLL
+	DEFPUSHBUTTON "&Connect", IDOK,      39, 43,  50, 14
+	PUSHBUTTON    "E&xit",    IDCANCEL,  93, 43,  50, 14
+END
+
+VS_VERSION_INFO VERSIONINFO
+FILEVERSION     PROJECT_MAJOR, PROJECT_MINOR, PROJECT_PATCH, PROJECT_TWEAK
+PRODUCTVERSION  PROJECT_MAJOR, PROJECT_MINOR, PROJECT_PATCH, PROJECT_TWEAK
+FILETYPE        VFT_APP
+BEGIN
+	BLOCK "StringFileInfo"
+	BEGIN
+		BLOCK "040904B0"
+		BEGIN
+			VALUE "CompanyName",      PROJECT_AUTHOR
+			VALUE "FileDescription",  PROJECT_DESCRIPTION
+			VALUE "FileVersion",      PROJECT_VERSION
+			VALUE "InternalName",     PROJECT_NAME
+			VALUE "LegalCopyright",   PROJECT_AUTHOR
+			VALUE "OriginalFilename", PROJECT_NAME ".exe"
+			VALUE "ProductName",      PROJECT_NAME
+			VALUE "ProductVersion",   PROJECT_VERSION
+		END
+	END
+
+	BLOCK "VarFileInfo"
+	BEGIN
+		VALUE "Translation", 0x409, 1200
+	END
+END

xW/xW.svg

@@ -0,0 +1,24 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<svg version="1.1" width="48" height="48" viewBox="0 0 48 48"
+   xmlns="http://www.w3.org/2000/svg">
+
+  <defs>
+    <clipPath id="outer">
+      <rect x="-1" y="-0.15" width="5" height="3.30" />
+    </clipPath>
+    <clipPath id="inner">
+      <rect x="-1" y="0" width="5" height="3" />
+    </clipPath>
+  </defs>
+
+  <g transform="translate(6, 6) scale(12)" stroke-linecap="square">
+    <g clip-path="url(#outer)">
+      <path stroke="#ffffff" stroke-width="1.5" d="M 0.5,0 2.5,3" />
+      <path stroke="#ffffff" stroke-width="1.5" d="M 0.5,3 2.5,0" />
+    </g>
+    <g clip-path="url(#inner)">
+      <path stroke="#000000" stroke-width="0.2" d="M 0,0 2,3 M 1,0 3,3" />
+      <path stroke="#ff6600" stroke-width="0.3" d="M 0,3 2,0 M 1,3 3,0" />
+    </g>
+  </g>
+</svg>