QPID-3540 Typecasting and alignment requirements for various platforms

On sparc platform:

SchemaHash::update() fails when the hash byte array is cast as two quadwords
in a union. This fix uses the union in the definition of the hash byte array
to coerce the compiler to place them in quadword alignment when they are
created.

git-svn-id: https://svn.apache.org/repos/asf/qpid/trunk@1183456 13f79535-47bb-0310-9956-ffa450edef68

1 files changed, 5 insertions, 2 deletions

diff --git a/qpid/cpp/src/qmf/engine/SchemaImpl.h b/qpid/cpp/src/qmf/engine/SchemaImpl.h
index 8b079a5ec6..683fb6f8f0 100644
--- a/qpid/cpp/src/qmf/engine/SchemaImpl.h
+++ b/qpid/cpp/src/qmf/engine/SchemaImpl.h
@@ -35,7 +35,10 @@ namespace engine {
     //       they've been registered.
 
     class SchemaHash {
-        uint8_t hash[16];
+        union h {
+            uint8_t  b[16];
+            uint64_t q[2];
+        } hash;
     public:
         SchemaHash();
         void encode(qpid::framing::Buffer& buffer) const;
@@ -47,7 +50,7 @@ namespace engine {
         void update(Direction d) { update((uint8_t) d); }
         void update(Access a) { update((uint8_t) a); }
         void update(bool b) { update((uint8_t) (b ? 1 : 0)); }
-        const uint8_t* get() const { return hash; }
+        const uint8_t* get() const { return hash.b; }
         bool operator==(const SchemaHash& other) const;
         bool operator<(const SchemaHash& other) const;
         bool operator>(const SchemaHash& other) const;