Convert compression filters to in-place transforms and refactor

to minimize the amount of logic needed in the files specific to each
library.

1 files changed, 34 insertions, 0 deletions

diff --git a/src/lib/compression/comp_util.cpp b/src/lib/compression/comp_util.cpp
new file mode 100644
index 000000000..7fca1852d
--- /dev/null
+++ b/src/lib/compression/comp_util.cpp
@@ -0,0 +1,34 @@
+/*
+* Allocation Tracker
+* (C) 2014 Jack Lloyd
+*
+* Distributed under the terms of the Botan license
+*/
+
+#include <botan/internal/comp_util.h>
+#include <cstring>
+#include <cstdlib>
+
+namespace Botan {
+
+void* Compression_Alloc_Info::do_malloc(size_t n, size_t size)
+   {
+   const size_t total_sz = n * size;
+
+   void* ptr = std::malloc(total_sz);
+   m_current_allocs[ptr] = total_sz;
+   return ptr;
+   }
+
+void Compression_Alloc_Info::do_free(void* ptr)
+   {
+   auto i = m_current_allocs.find(ptr);
+   if(i == m_current_allocs.end())
+      throw std::runtime_error("Compression_Alloc_Info::free got pointer not allocated by us");
+
+   std::memset(ptr, 0, i->second);
+   std::free(ptr);
+   m_current_allocs.erase(i);
+   }
+
+}