Add support for generating taler_signatures.h.

* contrib/sigp/: New dir.
* contrib/sigp/Makefile: New file.
* contrib/sigp/README: New file.
* contrib/sigp/h.footer: New file.
* contrib/sigp/h.header: New file.
* contrib/sigp/h.template: New file.

contrib/sigp/Makefile

@@ -0,0 +1,21 @@
+FILES = taler_signatures.h
+
+gana = ../gana
+
+
+all: check $(FILES)
+check: registry.rec
+	recfix --check registry.rec
+registry.rec:
+	ln -s $(gana)/gnunet-signatures/registry.rec
+distclean:
+	rm -f *.tmp
+clean:
+	rm -f $(FILES) *.tmp registry.rec
+taler_signatures.h.tmp: registry.rec h.template
+	$(gana)/format.sh h.template 'Package = "GNU Taler"' < registry.rec > $@
+
+taler_signatures.h: h.header taler_signatures.h.tmp h.footer
+	cat h.header taler_signatures.h.tmp h.footer > $@
+
+.PHONY: check clean distclean

contrib/sigp/README

@@ -0,0 +1,3 @@
+This directory contains bootstrap code to extract info from the
+Signature Purposes database (registry) and format it in various ways.
+It is a peer of ${top_srcdir}/contrib/gana/ (q.v.).

contrib/sigp/h.footer

@@ -0,0 +1,3 @@
+
+
+#endif

contrib/sigp/h.header

@@ -0,0 +1,32 @@
+/*
+  This file is part of TALER
+  Copyright (C) 2014-2022 Taler Systems SA
+
+  TALER is free software; you can redistribute it and/or modify it under the
+  terms of the GNU General Public License as published by the Free Software
+  Foundation; either version 3, or (at your option) any later version.
+
+  TALER is distributed in the hope that it will be useful, but WITHOUT ANY
+  WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
+  A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License along with
+  TALER; see the file COPYING.  If not, see <http://www.gnu.org/licenses/>
+*/
+/**
+ * @file taler_signatures.h
+ * @brief message formats and signature constants used to define
+ *        the binary formats of signatures in Taler
+ * @author Florian Dold
+ * @author Benedikt Mueller
+ *
+ * This file should define the constants and C structs that one needs
+ * to know to implement Taler clients (wallets or merchants or
+ * auditor) that need to produce or verify Taler signatures.
+ */
+#ifndef TALER_SIGNATURES_H
+#define TALER_SIGNATURES_H
+
+#include <gnunet/gnunet_util_lib.h>
+#include "taler_amount_lib.h"
+#include "taler_crypto_lib.h"

contrib/sigp/h.template

@@ -0,0 +1,6 @@
+
+
+/**
+ * {{Comment}}
+ */
+#define TALER_SIGNATURE_{{Name}} {{Number}}