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added small hack against re-hashing due to stat64 depending on local time on windows

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mr-alice 2016-09-23 20:07:57 +02:00
parent 9ce4b13e50
commit 71a5bffed8
1 changed files with 21 additions and 1 deletions
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22
libretroshare/src/file_sharing/hash_cache.cc
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@ -191,9 +191,29 @@ bool HashStorage::requestHash(const std::string& full_path,uint64_t size,time_t
time_t now = time(NULL) ;
std::map<std::string,HashStorageInfo>::iterator it = mFiles.find(full_path) ;
if(it != mFiles.end() && (uint64_t)mod_time == it->second.modf_stamp && size == it->second.size)
// On windows we compare the time up to +/- 3600 seconds. This avoids re-hashing files in case of daylight saving change.
//
// See:
// https://support.microsoft.com/en-us/kb/190315
//
if(it != mFiles.end()
#ifdef WINDOWS_SYS
&& ( (uint64_t)mod_time == it->second.modf_stamp || (uint64_t)mod_time+3600 == it->second.modf_stamp ||(uint64_t)mod_time == it->second.modf_stamp+3600)
#else
&& (uint64_t)mod_time == it->second.modf_stamp
#endif
&& size == it->second.size)
{
it->second.time_stamp = now ;
#ifdef WINDOWS_SYS
if(it->second.time_stamp != (uint64_t)mod_time)
{
std::cerr << "(WW) detected a 1 hour shift in file modification time. This normally happens to many files at once, when daylight saving time shifts (file=\"" << full_path << "\")." << std::endl;
it->second.time_stamp = (uint64_t)mod_time;
}
#endif
known_hash = it->second.hash;
#ifdef HASHSTORAGE_DEBUG
std::cerr << "Found in cache." << std::endl ;