oysteikt/mpd
0
0
Fork 0
Code Issues Pull Requests Releases Activity

storage/State: use std::hash() instead of boost::crc

Browse Source 
Also eliminate the useless std::set.
This commit is contained in:
Max Kellermann 2022-11-17 05:18:28 +01:00
parent a5d04be21f
commit 2e453ef58a
1 changed files with 8 additions and 13 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

21
src/storage/StorageState.cxx
View File

@ -40,9 +40,7 @@
#pragma GCC diagnostic ignored "-Wcomma"
#endif
#include <boost/crc.hpp>
#include <set>
#include <functional> // for std::hash()
#define MOUNT_STATE_BEGIN "mount_begin"
#define MOUNT_STATE_END "mount_end"
@ -150,19 +148,16 @@ storage_state_get_hash(const Instance &instance) noexcept
if (instance.storage == nullptr)
return 0;
std::set<std::string> mounts;
unsigned result = 0;
const auto visitor = [&mounts](const char *mount_uri, const Storage &storage) {
mounts.emplace(std::string(mount_uri) + ":" + storage.MapUTF8(""));
const std::hash<std::string_view> hash;
const auto visitor = [&result, &hash](const char *mount_uri, const Storage &storage) {
result = result * 33 + hash(mount_uri);
result = result * 33 + hash(storage.MapUTF8(""));
};
((CompositeStorage*)instance.storage)->VisitMounts(visitor);
boost::crc_32_type result;
for (const auto& mount : mounts) {
result.process_bytes(mount.c_str(), mount.length());
}
return result.checksum();
return result;
}