precomputed block hashes are now in blocks of N (currently 256)

This shaves a lot of space off binaries

1 files changed, 11 insertions, 3 deletions

diff --git a/src/blockchain_utilities/blocksdat_file.cpp b/src/blockchain_utilities/blocksdat_file.cpp
index 63224225f..32e93345e 100644
--- a/src/blockchain_utilities/blocksdat_file.cpp
+++ b/src/blockchain_utilities/blocksdat_file.cpp
@@ -82,7 +82,7 @@ bool BlocksdatFile::open_writer(const boost::filesystem::path& file_path, uint64
 
 bool BlocksdatFile::initialize_file(uint64_t block_stop)
 {
-  const uint32_t nblocks = block_stop + 1;
+  const uint32_t nblocks = (block_stop + 1) / HASH_OF_HASHES_STEP;
   unsigned char nblocksc[4];
 
   nblocksc[0] = nblocks & 0xff;
@@ -101,8 +101,16 @@ bool BlocksdatFile::initialize_file(uint64_t block_stop)
 
 void BlocksdatFile::write_block(const crypto::hash& block_hash)
 {
-  const std::string data(block_hash.data, sizeof(block_hash));
-  *m_raw_data_file << data;
+  m_hashes.push_back(block_hash);
+  while (m_hashes.size() >= HASH_OF_HASHES_STEP)
+  {
+    crypto::hash hash;
+    crypto::cn_fast_hash(m_hashes.data(), HASH_OF_HASHES_STEP * sizeof(crypto::hash), hash);
+    memmove(m_hashes.data(), m_hashes.data() + HASH_OF_HASHES_STEP * sizeof(crypto::hash), (m_hashes.size() - HASH_OF_HASHES_STEP) * sizeof(crypto::hash));
+    m_hashes.resize(m_hashes.size() - HASH_OF_HASHES_STEP);
+    const std::string data(hash.data, sizeof(hash));
+    *m_raw_data_file << data;
+  }
 }
 
 bool BlocksdatFile::close()