Replace base exception class with standard library

There is no point to having our own generic exception class. Let's use
the one provided by the standard C++ library.

5 files changed, 56 insertions, 25 deletions

diff --git a/common/rdr/AESInStream.cxx b/common/rdr/AESInStream.cxx
index d6d944a3..3a56ef73 100644
--- a/common/rdr/AESInStream.cxx
+++ b/common/rdr/AESInStream.cxx
@@ -21,8 +21,8 @@
 #endif
 
 #include <assert.h>
+
 #include <rdr/AESInStream.h>
-#include <rdr/Exception.h>
 
 #ifdef HAVE_NETTLE
 using namespace rdr;
@@ -68,7 +68,7 @@ bool AESInStream::fillBuffer()
     EAX_DIGEST(&eaxCtx256, aes256_encrypt, 16, macComputed);
   }
   if (memcmp(mac, macComputed, 16) != 0)
-    throw Exception("AESInStream: failed to authenticate message");
+    throw std::runtime_error("AESInStream: failed to authenticate message");
   in->setptr(2 + length + 16);
   end += length;
 
diff --git a/common/rdr/Exception.cxx b/common/rdr/Exception.cxx
index b2c7e7d0..65bd9720 100644
--- a/common/rdr/Exception.cxx
+++ b/common/rdr/Exception.cxx
@@ -44,7 +44,15 @@ using namespace rdr;
 
 
 GAIException::GAIException(const char* s, int err_)
-  : Exception(rfb::format("%s: %s (%d)", s, strerror(err_).c_str(), err_)),
+  : std::runtime_error(rfb::format("%s: %s (%d)", s,
+                                   strerror(err_).c_str(), err_)),
+    err(err_)
+{
+}
+
+GAIException::GAIException(const std::string& s, int err_)
+  : std::runtime_error(rfb::format("%s: %s (%d)", s.c_str(),
+                                   strerror(err_).c_str(), err_)),
     err(err_)
 {
 }
@@ -63,8 +71,16 @@ std::string GAIException::strerror(int err_) const
 #endif
 }
 
-PosixException::PosixException(const char* s, int err_)
-  : Exception(rfb::format("%s: %s (%d)", s, strerror(err_).c_str(), err_)),
+PosixException::PosixException(const char* what_arg, int err_)
+  : std::runtime_error(rfb::format("%s: %s (%d)", what_arg,
+                                   strerror(err_).c_str(), err_)),
+    err(err_)
+{
+}
+
+PosixException::PosixException(const std::string& what_arg, int err_)
+  : std::runtime_error(rfb::format("%s: %s (%d)", what_arg.c_str(),
+                                   strerror(err_).c_str(), err_)),
     err(err_)
 {
 }
@@ -84,8 +100,16 @@ std::string PosixException::strerror(int err_) const
 }
 
 #ifdef WIN32
-Win32Exception::Win32Exception(const char* s, unsigned err_)
-  : Exception(rfb::format("%s: %s (%d)", s, strerror(err_).c_str(), err_)),
+Win32Exception::Win32Exception(const char* what_arg, unsigned err_)
+  : std::runtime_error(rfb::format("%s: %s (%d)", what_arg,
+                                   strerror(err_).c_str(), err_)),
+    err(err_)
+{
+}
+
+Win32Exception::Win32Exception(const std::string& what_arg, unsigned err_)
+  : std::runtime_error(rfb::format("%s: %s (%d)", what_arg.c_str(),
+                                   strerror(err_).c_str(), err_)),
     err(err_)
 {
 }
diff --git a/common/rdr/Exception.h b/common/rdr/Exception.h
index 9ce0462a..3e0ec467 100644
--- a/common/rdr/Exception.h
+++ b/common/rdr/Exception.h
@@ -27,47 +27,52 @@
 
 namespace rdr {
 
-  class Exception : public std::runtime_error {
+  class PosixException : public std::runtime_error {
   public:
-    Exception(const char* what_arg) : std::runtime_error(what_arg) {}
-    Exception(const std::string& what_arg) : std::runtime_error(what_arg) {}
-  };
-
-  struct PosixException : public Exception {
     int err;
-    PosixException(const char* s, int err_);
+    PosixException(const char* what_arg, int err_);
+    PosixException(const std::string& what_arg, int err_);
   private:
     std::string strerror(int err_) const;
   };
 
 #ifdef WIN32
-  struct Win32Exception : public Exception {
+  class Win32Exception : public std::runtime_error {
+  public:
     unsigned err;
-    Win32Exception(const char* s, unsigned err_);
+    Win32Exception(const char* what_arg, unsigned err_);
+    Win32Exception(const std::string& what_arg, unsigned err_);
   private:
     std::string strerror(unsigned err_) const;
   };
 #endif
 
 #ifdef WIN32
-  struct SocketException : public Win32Exception {
-    SocketException(const char* text, unsigned err_) : Win32Exception(text, err_) {}
+  class SocketException : public Win32Exception {
+  public:
+    SocketException(const char* what_arg, unsigned err_) : Win32Exception(what_arg, err_) {}
+    SocketException(const std::string& what_arg, unsigned err_) : Win32Exception(what_arg, err_) {}
   };
 #else
-  struct SocketException : public PosixException {
-    SocketException(const char* text, int err_) : PosixException(text, err_) {}
+  class SocketException : public PosixException {
+  public:
+    SocketException(const char* what_arg, unsigned err_) : PosixException(what_arg, err_) {}
+    SocketException(const std::string& what_arg, unsigned err_) : PosixException(what_arg, err_) {}
   };
 #endif
 
-  struct GAIException : public Exception {
+  class GAIException : public std::runtime_error {
+  public:
     int err;
     GAIException(const char* s, int err_);
+    GAIException(const std::string& s, int err_);
   private:
     std::string strerror(int err_) const;
   };
 
-  struct EndOfStream : public Exception {
-    EndOfStream() : Exception("End of stream") {}
+  class EndOfStream : public std::runtime_error {
+  public:
+    EndOfStream() : std::runtime_error("End of stream") {}
   };
 
 }
diff --git a/common/rdr/TLSException.cxx b/common/rdr/TLSException.cxx
index df2701d3..7061f38b 100644
--- a/common/rdr/TLSException.cxx
+++ b/common/rdr/TLSException.cxx
@@ -36,7 +36,8 @@ using namespace rdr;
 
 #ifdef HAVE_GNUTLS
 TLSException::TLSException(const char* s, int err_)
-  : Exception(rfb::format("%s: %s (%d)", s, gnutls_strerror(err_), err_)),
+  : std::runtime_error(rfb::format("%s: %s (%d)", s,
+                                   gnutls_strerror(err_), err_)),
     err(err_)
 {
 }
diff --git a/common/rdr/TLSException.h b/common/rdr/TLSException.h
index b519bfef..f58b618d 100644
--- a/common/rdr/TLSException.h
+++ b/common/rdr/TLSException.h
@@ -25,7 +25,8 @@
 
 namespace rdr {
 
-  struct TLSException : public Exception {
+  class TLSException : public std::runtime_error {
+  public:
     int err;
     TLSException(const char* s, int err_);
   };