cpp: Add API for swdb queries

* lang/cpp/src/swdbresult.cpp,
 lang/cpp/src/swdbresult.h (SwdbResult): New.
* lang/cpp/src/Makefile.am: Update accordingly.

NEWS

@@ -16,6 +16,7 @@ Noteworthy changes in version 1.7.2 (unreleased)
  qt: DN::Attribute               NEW.
  cpp: EngineInfo::Version::Version(const char*) NEW.
  cpp: EngineInfo::Version::Version()            NEW.
+ cpp: SwdbResult                                NEW.
 
 
 Noteworthy changes in version 1.7.1 (2016-10-18)

lang/cpp/src/Makefile.am

@@ -33,7 +33,7 @@ main_sources = \
     gpgsetownertrusteditinteractor.cpp gpgsignkeyeditinteractor.cpp \
     gpgadduserideditinteractor.cpp defaultassuantransaction.cpp \
     scdgetinfoassuantransaction.cpp gpgagentgetinfoassuantransaction.cpp \
-    vfsmountresult.cpp configuration.cpp tofuinfo.cpp
+    vfsmountresult.cpp configuration.cpp tofuinfo.cpp swdbresult.cpp
 
 gpgmepp_headers = \
     configuration.h context.h data.h decryptionresult.h \
@@ -45,7 +45,7 @@ gpgmepp_headers = \
     importresult.h keygenerationresult.h key.h keylistresult.h \
     notation.h result.h scdgetinfoassuantransaction.h signingresult.h \
     trustitem.h verificationresult.h vfsmountresult.h gpgmepp_export.h \
-    tofuinfo.h
+    tofuinfo.h swdbresult.h
 
 private_gpgmepp_headers = \
     result_p.h context_p.h util.h callbacks.h data_p.h

lang/cpp/src/swdbresult.cpp

@@ -0,0 +1,231 @@
+/* swdbresult.cpp - wraps gpgme swdb result / query
+  Copyright (C) 2016 Intevation GmbH
+
+  This file is part of GPGME++.
+
+  GPGME++ is free software; you can redistribute it and/or
+  modify it under the terms of the GNU Library General Public
+  License as published by the Free Software Foundation; either
+  version 2 of the License, or (at your option) any later version.
+
+  GPGME++ 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 Library General Public License for more details.
+
+  You should have received a copy of the GNU Library General Public License
+  along with GPGME++; see the file COPYING.LIB.  If not, write to the
+  Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+  Boston, MA 02110-1301, USA.
+*/
+
+#ifdef HAVE_CONFIG_H
+ #include "config.h"
+#endif
+
+#include "swdbresult.h"
+
+#include <istream>
+
+#include "error.h"
+
+#include "gpgme.h"
+
+class GpgME::SwdbResult::Private
+{
+public:
+    Private() {}
+    Private(gpgme_query_swdb_result_t result)
+        : mResult(result ? new _gpgme_op_query_swdb_result (*result) : nullptr)
+    {
+        if (!result) {
+            mResult->name = nullptr;
+            return;
+        }
+        if (result->name) {
+            mResult->name = strdup(result->name);
+        }
+        if (result->version) {
+            mVersion = result->version;
+        }
+        if (result->iversion) {
+            mIVersion = result->iversion;
+        }
+    }
+
+    Private(const Private &other)
+        : mResult(other.mResult)
+    {
+        if (mResult && mResult->name) {
+            mResult->name = strdup(mResult->name);
+        }
+        mVersion = other.mVersion;
+        mIVersion = other.mIVersion;
+    }
+
+    ~Private()
+    {
+        if (mResult) {
+            std::free(mResult->name);
+            delete mResult;
+        }
+    }
+
+    GpgME::EngineInfo::Version mVersion;
+    GpgME::EngineInfo::Version mIVersion;
+    gpgme_query_swdb_result_t mResult;
+};
+
+GpgME::SwdbResult::SwdbResult(gpgme_query_swdb_result_t result)
+    : d(new Private(result))
+{
+}
+
+GpgME::SwdbResult::SwdbResult() : d()
+{
+}
+
+bool GpgME::SwdbResult::isNull() const
+{
+    return !d || !d->mResult;
+}
+
+std::string GpgME::SwdbResult::name() const
+{
+    if (isNull() || !d->mResult->name) {
+        return std::string();
+    }
+    return d->mResult->name;
+}
+
+GpgME::EngineInfo::Version GpgME::SwdbResult::version() const
+{
+    if (isNull()) {
+        return GpgME::EngineInfo::Version();
+    }
+    return d->mVersion;
+}
+
+GpgME::EngineInfo::Version GpgME::SwdbResult::installedVersion() const
+{
+    if (isNull()) {
+        return GpgME::EngineInfo::Version();
+    }
+    return d->mIVersion;
+}
+
+unsigned long GpgME::SwdbResult::created() const
+{
+    return isNull() ? 0 : d->mResult->created;
+}
+
+unsigned long GpgME::SwdbResult::retrieved() const
+{
+    return isNull() ? 0 : d->mResult->retrieved;
+}
+
+unsigned long GpgME::SwdbResult::releaseDate() const
+{
+    return isNull() ? 0 : d->mResult->reldate;
+}
+
+bool GpgME::SwdbResult::warning() const
+{
+    return isNull() ? 0 : d->mResult->warning;
+}
+
+bool GpgME::SwdbResult::update() const
+{
+    return isNull() ? 0 : d->mResult->update;
+}
+
+bool GpgME::SwdbResult::noinfo() const
+{
+    return isNull() ? 0 : d->mResult->noinfo;
+}
+
+bool GpgME::SwdbResult::unknown() const
+{
+    return isNull() ? 0 : d->mResult->unknown;
+}
+
+bool GpgME::SwdbResult::error() const
+{
+    return isNull() ? 0 : d->mResult->error;
+}
+
+bool GpgME::SwdbResult::tooOld() const
+{
+    return isNull() ? 0 : d->mResult->tooold;
+}
+
+bool GpgME::SwdbResult::urgent() const
+{
+    return isNull() ? 0 : d->mResult->urgent;
+}
+
+std::vector<GpgME::SwdbResult> GpgME::SwdbResult::query(const char *name,
+                                                        const char *iversion,
+                                                        Error *err)
+{
+  std::vector <GpgME::SwdbResult> ret;
+  gpgme_ctx_t ctx;
+  gpgme_error_t gpgerr = gpgme_new(&ctx);
+
+  if (gpgerr) {
+      if (err) {
+        *err = Error (gpgerr);
+      }
+      return ret;
+  }
+
+  gpgerr = gpgme_set_protocol(ctx, GPGME_PROTOCOL_GPGCONF);
+
+  if (gpgerr) {
+      if (err) {
+        *err = Error(gpgerr);
+      }
+      gpgme_release(ctx);
+      return ret;
+  }
+
+  gpgerr = gpgme_op_query_swdb(ctx, name, iversion, 0);
+
+  if (gpgerr) {
+      if (err) {
+        *err = Error(gpgerr);
+      }
+      gpgme_release(ctx);
+      return ret;
+  }
+  gpgme_query_swdb_result_t result = gpgme_op_query_swdb_result(ctx);
+  while (result) {
+      ret.push_back(SwdbResult(result));
+      result = result->next;
+  }
+
+  gpgme_release(ctx);
+  return ret;
+}
+
+std::ostream &GpgME::operator<<(std::ostream &os, const GpgME::SwdbResult &result)
+{
+    os << "GpgME::SwdbResult(";
+    if (!result.isNull()) {
+        os << "\n name: "     << result.name()
+           << "\n version: "  << result.version()
+           << "\n installed: "<< result.installedVersion()
+           << "\n created: "  << result.created()
+           << "\n retrieved: "<< result.retrieved()
+           << "\n warning: "  << result.warning()
+           << "\n update: "   << result.update()
+           << "\n urgent: "   << result.urgent()
+           << "\n noinfo: "   << result.noinfo()
+           << "\n unknown: "  << result.unknown()
+           << "\n tooOld: "   << result.tooOld()
+           << "\n error: "    << result.error()
+           << "\n reldate: "  << result.releaseDate()
+           << '\n';
+    }
+    return os << ")\n";
+}

lang/cpp/src/swdbresult.h

@@ -0,0 +1,128 @@
+/*
+  swdbresult.h - wraps a gpgme swdb query / rsult
+  Copyright (C) 2016 Intevation GmbH
+
+  This file is part of GPGME++.
+
+  GPGME++ is free software; you can redistribute it and/or
+  modify it under the terms of the GNU Library General Public
+  License as published by the Free Software Foundation; either
+  version 2 of the License, or (at your option) any later version.
+
+  GPGME++ 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 Library General Public License for more details.
+
+  You should have received a copy of the GNU Library General Public License
+  along with GPGME++; see the file COPYING.LIB.  If not, write to the
+  Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+  Boston, MA 02110-1301, USA.
+*/
+#ifndef __GPGMEPP_SWDB_H__
+#define __GPGMEPP_SWDB_H__
+
+#include "gpgmepp_export.h"
+
+#include "global.h"
+#include "engineinfo.h"
+
+#include <vector>
+#include <string>
+#include <iostream>
+#include <ostream>
+
+namespace GpgME
+{
+
+class GPGMEPP_EXPORT SwdbResult
+{
+public:
+    /* Obtain swdb results through query() */
+    SwdbResult();
+    explicit SwdbResult(gpgme_query_swdb_result_t result);
+
+    /** Query the swdb to get information about updates.
+     *
+     * Runs gpgconf --query-swdb through gpgme and
+     * returns a list of results.
+     * If iversion is given as NULL a check is only done if GPGME
+     * can figure out the version by itself (for example when using
+     * "gpgme" or "gnupg").
+     *
+     * If NULL is used for name the current gpgme version is
+     * checked.
+     *
+     * @param name: Name of the component to query.
+     * @param iversion: Optionally the installed version.
+     * @param err: Optional error.
+     */
+    static std::vector<SwdbResult> query(const char *name,
+                                         const char *iversion = NULL,
+                                         Error *err = NULL);
+
+    const SwdbResult &operator=(SwdbResult other)
+    {
+        swap(other);
+        return *this;
+    }
+
+    void swap(SwdbResult &other)
+    {
+        using std::swap;
+        swap(this->d, other.d);
+    }
+    bool isNull() const;
+
+    /* The name of the package (e.g. "gpgme", "gnupg") */
+    std::string name() const;
+
+    /* The version of the installed version.  */
+    EngineInfo::Version installedVersion() const;
+
+    /* The time the online info was created.  */
+    unsigned long created() const;
+
+    /* The time the online info was retrieved.  */
+    unsigned long retrieved() const;
+
+    /* This bit is set if an error occured or some of the information
+     * in this structure may not be set.  */
+    bool warning() const;
+
+    /* An update is available.  */
+    bool update() const;
+
+    /* The update is important.  */
+    bool urgent() const;
+
+    /* No information at all available.  */
+    bool noinfo() const;
+
+    /* The package name is not known. */
+    bool unknown() const;
+
+    /* The information here is too old.  */
+    bool tooOld() const;
+
+    /* Other error.  */
+    bool error() const;
+
+    /* The version of the latest released version.  */
+    EngineInfo::Version version() const;
+
+    /* The release date of that version.  */
+    unsigned long releaseDate() const;
+
+private:
+    class Private;
+    std::shared_ptr<Private> d;
+};
+
+GPGMEPP_EXPORT std::ostream &operator<<(std::ostream &os, const SwdbResult &info);
+
+} // namespace GpgME
+
+GPGMEPP_MAKE_STD_SWAP_SPECIALIZATION(SwdbResult)
+
+#endif