Reroot the exception hierarchy into a toplevel Exception class

As the alternatives are unfortunate for applications trying to catch
all library errors, and it seems deriving from std::runtime_error
causes problems with MSVC DLLs (GH #340)

Effectively reverts 2837e915d82e43

1 files changed, 5 insertions, 5 deletions

diff --git a/src/lib/entropy/egd/es_egd.cpp b/src/lib/entropy/egd/es_egd.cpp
index c3b75e8f5..8392996ab 100644
--- a/src/lib/entropy/egd/es_egd.cpp
+++ b/src/lib/entropy/egd/es_egd.cpp
@@ -44,7 +44,7 @@ int EGD_EntropySource::EGD_Socket::open_socket(const std::string& path)
       addr.sun_family = PF_LOCAL;
 
       if(path.length() >= sizeof(addr.sun_path))
-         throw std::invalid_argument("EGD socket path is too long");
+         throw Invalid_Argument("EGD socket path is too long");
 
       std::strncpy(addr.sun_path, path.c_str(), sizeof(addr.sun_path));
 
@@ -82,19 +82,19 @@ size_t EGD_EntropySource::EGD_Socket::read(byte outbuf[], size_t length)
          1, static_cast<byte>(std::min<size_t>(length, 255)) };
 
       if(::write(m_fd, egd_read_command, 2) != 2)
-         throw std::runtime_error("Writing entropy read command to EGD failed");
+         throw Exception("Writing entropy read command to EGD failed");
 
       byte out_len = 0;
       if(::read(m_fd, &out_len, 1) != 1)
-         throw std::runtime_error("Reading response length from EGD failed");
+         throw Exception("Reading response length from EGD failed");
 
       if(out_len > egd_read_command[1])
-         throw std::runtime_error("Bogus length field received from EGD");
+         throw Exception("Bogus length field received from EGD");
 
       ssize_t count = ::read(m_fd, outbuf, out_len);
 
       if(count != out_len)
-         throw std::runtime_error("Reading entropy result from EGD failed");
+         throw Exception("Reading entropy result from EGD failed");
 
       return static_cast<size_t>(count);
       }