fix idhash not public

We accidentally made idhash not public by not publishing its header
in the right place.  This is really generic utility stuff, so we
have posted it in the nng/supplemental/util/ directory.

We've also removed the ability to remove this -- its a very small amount
of additional code, as its just a wrapper on top of mandatory functionality.

cmake/NNGOptions.cmake

@@ -1,5 +1,5 @@
 #
-# Copyright 2023 Staysail Systems, Inc. <[email protected]>
+# Copyright 2024 Staysail Systems, Inc. <[email protected]>
 #
 # This software is supplied under the terms of the MIT License, a
 # copy of which should be located in the distribution where this
@@ -141,8 +141,3 @@ if (NNG_TRANSPORT_WS OR NNG_TRANSPORT_WSS)
     set(NNG_SUPP_BASE64 ON)
     set(NNG_SUPP_SHA1 ON)
 endif()
-
-# ID hash API is small wrapper around core, probably should always be enabled unless memory
-# is extraordinarily constrained.
-option(NNG_SUPP_IDHASH "Enable application IDHASH API" ON)
-mark_as_advanced(NNG_SUPP_IDHASH)

docs/man/nng_id_map.3supp.adoc

@@ -1,6 +1,6 @@
 = nng_id_map(3supp)
 //
-// Copyright 2023 Staysail Systems, Inc. <[email protected]>
+// Copyright 2024 Staysail Systems, Inc. <[email protected]>
 //
 // This document is supplied under the terms of the MIT License, a
 // copy of which should be located in the distribution where this
@@ -17,7 +17,7 @@ nng_id_map - identifier based mapping table
 [source, c]
 ----
 #include <nng/nng.h>
-#include <nng/supplemental/idhash/idhash.h>
+#include <nng/supplemental/util/idhash.h>
 
 typedef struct nng_id_map_s nng_id_map;
 

src/supplemental/idhash/idhash.h → include/nng/supplemental/util/idhash.h

@@ -1,14 +1,14 @@
 //
-// Copyright 2023 Staysail Systems, Inc. <[email protected]>
+// Copyright 2024 Staysail Systems, Inc. <[email protected]>
 //
 // This software is supplied under the terms of the MIT License, a
 // copy of which should be located in the distribution where this
 // file was obtained (LICENSE.txt).  A copy of the license may also be
 // found online at https://opensource.org/licenses/MIT.
 //
 
-#ifndef NNG_SUPPLEMENTAL_IDHASH_IDHASH_H
-#define NNG_SUPPLEMENTAL_IDHASH_IDHASH_H
+#ifndef NNG_SUPPLEMENTAL_UTIL_IDHASH_H
+#define NNG_SUPPLEMENTAL_UTIL_IDHASH_H
 
 #include <nng/nng.h>
 

src/supplemental/CMakeLists.txt

@@ -1,5 +1,5 @@
 #
-# Copyright 2021 Staysail Systems, Inc. <[email protected]>
+# Copyright 2024 Staysail Systems, Inc. <[email protected]>
 #
 # This software is supplied under the terms of the MIT License, a
 # copy of which should be located in the distribution where this
@@ -11,8 +11,7 @@ nng_directory(supplemental)
 
 add_subdirectory(base64)
 add_subdirectory(http)
-add_subdirectory(idhash)
 add_subdirectory(sha1)
 add_subdirectory(tls)
 add_subdirectory(util)
-add_subdirectory(websocket)
+add_subdirectory(websocket)

src/supplemental/util/CMakeLists.txt

@@ -1,11 +1,15 @@
 #
-# Copyright 2019 Staysail Systems, Inc. <[email protected]>
+# Copyright 2024 Staysail Systems, Inc. <[email protected]>
 #
 # This software is supplied under the terms of the MIT License, a
 # copy of which should be located in the distribution where this
 # file was obtained (LICENSE.txt).  A copy of the license may also be
 # found online at https://opensource.org/licenses/MIT.
 #
 
-nng_sources(options.c platform.c)
-nng_headers(nng/supplemental/util/options.h nng/supplemental/util/platform.h)
+nng_sources(idhash.c options.c platform.c)
+nng_headers(
+	nng/supplemental/util/idhash.h
+	nng/supplemental/util/options.h
+	nng/supplemental/util/platform.h)
+nng_test(idhash_test)

src/supplemental/idhash/idhash.c → src/supplemental/util/idhash.c

@@ -1,13 +1,15 @@
 //
-// Copyright 2023 Staysail Systems, Inc. <[email protected]>
+// Copyright 2024 Staysail Systems, Inc. <[email protected]>
 //
 // This software is supplied under the terms of the MIT License, a
 // copy of which should be located in the distribution where this
 // file was obtained (LICENSE.txt).  A copy of the license may also be
 // found online at https://opensource.org/licenses/MIT.
 //
 
-#include "supplemental/idhash/idhash.h"
+#include <nng/nng.h>
+#include <nng/supplemental/util/idhash.h>
+
 #include "core/nng_impl.h"
 
 struct nng_id_map_s {

src/supplemental/idhash/idhash_test.c → src/supplemental/util/idhash_test.c

@@ -1,5 +1,5 @@
 //
-// Copyright 2023 Staysail Systems, Inc. <[email protected]>
+// Copyright 2024 Staysail Systems, Inc. <[email protected]>
 //
 // This software is supplied under the terms of the MIT License, a
 // copy of which should be located in the distribution where this
@@ -9,7 +9,7 @@
 
 #include <nuts.h>
 
-#include "idhash.h"
+#include <nng/supplemental/util/idhash.h>
 
 void
 test_id_basic(void)