From 34dd478848cc43bf9520d366207f20bdfe2c4962 Mon Sep 17 00:00:00 2001
From: Robin Mueller <muellerr@irs.uni-stuttgart.de>
Date: Thu, 8 Sep 2022 16:25:19 +0200
Subject: [PATCH] helper class OneRemoteConfigProvider

---
 src/fsfw/cfdp/VarLenFields.cpp              |  4 ++++
 src/fsfw/cfdp/VarLenFields.h                |  1 +
 src/fsfw/cfdp/handler/RemoteConfigTableIF.h | 19 +++++++++++++++++++
 3 files changed, 24 insertions(+)

diff --git a/src/fsfw/cfdp/VarLenFields.cpp b/src/fsfw/cfdp/VarLenFields.cpp
index 512c713c..b9e0b3a8 100644
--- a/src/fsfw/cfdp/VarLenFields.cpp
+++ b/src/fsfw/cfdp/VarLenFields.cpp
@@ -131,3 +131,7 @@ bool cfdp::VarLenField::operator<(const cfdp::VarLenField &other) const {
 bool cfdp::VarLenField::operator==(const cfdp::VarLenField &other) const {
   return getWidth() == other.getWidth() and getValue() == other.getValue();
 }
+
+bool cfdp::VarLenField::operator!=(const cfdp::VarLenField &other) const {
+  return not(*this == other);
+}
diff --git a/src/fsfw/cfdp/VarLenFields.h b/src/fsfw/cfdp/VarLenFields.h
index 03664995..37a9cf5c 100644
--- a/src/fsfw/cfdp/VarLenFields.h
+++ b/src/fsfw/cfdp/VarLenFields.h
@@ -27,6 +27,7 @@ class VarLenField : public SerializeIF {
   VarLenField(cfdp::WidthInBytes width, size_t value);
 
   bool operator==(const VarLenField &other) const;
+  bool operator!=(const VarLenField &other) const;
   bool operator<(const VarLenField &other) const;
 
   ReturnValue_t setValue(cfdp::WidthInBytes, size_t value);
diff --git a/src/fsfw/cfdp/handler/RemoteConfigTableIF.h b/src/fsfw/cfdp/handler/RemoteConfigTableIF.h
index 1cd1ec1d..d0e6121d 100644
--- a/src/fsfw/cfdp/handler/RemoteConfigTableIF.h
+++ b/src/fsfw/cfdp/handler/RemoteConfigTableIF.h
@@ -11,6 +11,25 @@ class RemoteConfigTableIF {
   virtual bool getRemoteCfg(const cfdp::EntityId& remoteId, cfdp::RemoteEntityCfg** cfg) = 0;
 };
 
+/**
+ * Helper class for the common case that there is exactly one remote entity
+ */
+class OneRemoteConfigProvider : public RemoteConfigTableIF {
+ public:
+  explicit OneRemoteConfigProvider(RemoteEntityCfg cfg) : cfg(std::move(cfg)) {}
+
+  bool getRemoteCfg(const EntityId& remoteId, cfdp::RemoteEntityCfg** cfg_) override {
+    if (remoteId != cfg.remoteId) {
+      return false;
+    }
+    *cfg_ = &cfg;
+    return true;
+  }
+
+ private:
+  RemoteEntityCfg cfg;
+};
+
 }  // namespace cfdp
 
 #endif  // FSFW_CFDP_HANDLER_REMOTECONFIGTABLEIF_H