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utils/UUID_gen: Add bytes_view variant of get_name_UUID()

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Signed-off-by: Pekka Enberg <penberg@cloudius-systems.com>
This commit is contained in:
Pekka Enberg
2015-07-14 14:46:18 +03:00
parent 0b9eecc2d1
commit c003f89484
2 changed files with 12 additions and 4 deletions
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14
utils/UUID_gen.cc
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@@ -107,16 +107,22 @@ static int64_t make_clock_seq_and_node()
return lsb;
}
UUID UUID_gen::get_name_UUID(bytes_view b) {
return get_name_UUID(reinterpret_cast<const unsigned char*>(b.begin()), b.size());
}
UUID UUID_gen::get_name_UUID(sstring_view str) {
UUID UUID_gen::get_name_UUID(sstring_view s) {
static_assert(sizeof(char) == sizeof(sstring_view::value_type), "Assumed that str.size() counts in chars");
return get_name_UUID(reinterpret_cast<const unsigned char*>(s.begin()), s.size());
}
UUID UUID_gen::get_name_UUID(const unsigned char *s, size_t len) {
static_assert(CryptoPP::Weak1::MD5::DIGESTSIZE == 16, "MD5 digests should be 16 bytes long");
int8_t digest[16];
CryptoPP::Weak::MD5 hash;
static_assert(sizeof(char) == sizeof(sstring_view::value_type), "Assumed that str.size() counts in chars");
static_assert(sizeof(char) == sizeof(int8_t), "Assumed that chars are bytes");
hash.CalculateDigest(reinterpret_cast<unsigned char*>(digest),
reinterpret_cast<const unsigned char*>(str.begin()), str.size());
hash.CalculateDigest(reinterpret_cast<unsigned char*>(digest), s, len);
// set version to 3
digest[6] &= 0x0f;

2
utils/UUID_gen.hh
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@@ -108,7 +108,9 @@ public:
/**
* Creates a type 3 (name based) UUID based on the specified byte array.
*/
static UUID get_name_UUID(bytes_view b);
static UUID get_name_UUID(sstring_view str);
static UUID get_name_UUID(const unsigned char* s, size_t len);
/** decomposes a uuid into raw bytes. */
static std::array<int8_t, 16> decompose(const UUID& uuid)