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, 2 insertions, 2 deletions

diff --git a/src/lib/misc/fpe_fe1/fpe_fe1.cpp b/src/lib/misc/fpe_fe1/fpe_fe1.cpp
index f2502014b..bc14c425c 100644
--- a/src/lib/misc/fpe_fe1/fpe_fe1.cpp
+++ b/src/lib/misc/fpe_fe1/fpe_fe1.cpp
@@ -57,7 +57,7 @@ void factor(BigInt n, BigInt& a, BigInt& b)
       std::swap(a, b);
 
    if(a <= 1 || b <= 1)
-      throw std::runtime_error("Could not factor n for use in FPE");
+      throw Exception("Could not factor n for use in FPE");
    }
 
 /*
@@ -100,7 +100,7 @@ FPE_Encryptor::FPE_Encryptor(const SymmetricKey& key,
    std::vector<byte> n_bin = BigInt::encode(n);
 
    if(n_bin.size() > MAX_N_BYTES)
-      throw std::runtime_error("N is too large for FPE encryption");
+      throw Exception("N is too large for FPE encryption");
 
    mac->update_be(static_cast<u32bit>(n_bin.size()));
    mac->update(n_bin.data(), n_bin.size());