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* lib/: a the thread-id field, store it in the database

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djcb
2012-12-25 16:43:34 +02:00
parent 58f5e39d34
commit a625371da2
5 changed files with 64 additions and 58 deletions
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27
lib/mu-store-read.cc
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@ -44,18 +44,13 @@
// note: not re-entrant
const char*
std::string
_MuStore::get_uid_term (const char* path)
{
// combination of DJB, BKDR hash functions to get a 64 bit
// value
unsigned djbhash, bkdrhash, bkdrseed;
unsigned u;
char real_path[PATH_MAX + 1];
static char hex[18];
static const char uid_prefix =
mu_msg_field_xapian_prefix(MU_MSG_FIELD_ID_UID);
static const std::string uid_prefix (
1, mu_msg_field_xapian_prefix(MU_MSG_FIELD_ID_UID));
/* check profile to see if realpath is expensive; we need
* realpath here (and in mu-msg-file) to ensure that the same
@ -66,19 +61,7 @@ _MuStore::get_uid_term (const char* path)
if (!realpath (path, real_path))
strcpy (real_path, path);
djbhash = 5381;
bkdrhash = 0;
bkdrseed = 1313;
for(u = 0; real_path[u]; ++u) {
djbhash = ((djbhash << 5) + djbhash) + real_path[u];
bkdrhash = bkdrhash * bkdrseed + real_path[u];
}
snprintf (hex, sizeof(hex), "%c%08x%08x",
uid_prefix, djbhash, bkdrhash);
return hex;
return std::string (uid_prefix + mu_util_get_hash (real_path));
}