1 files changed, 112 insertions, 0 deletions
diff --git a/src/libnetdata/uuid/uuid.h b/src/libnetdata/uuid/uuid.h
new file mode 100644
index 00000000..cde45761
--- /dev/null
+++ b/src/libnetdata/uuid/uuid.h
@@ -0,0 +1,112 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+#ifndef NETDATA_UUID_H
+#define NETDATA_UUID_H
+
+// for compatibility with libuuid
+typedef unsigned char nd_uuid_t[16];
+
+// for quickly managing it as 2x 64-bit numbers
+typedef struct _uuid {
+    union {
+        nd_uuid_t uuid;
+        struct {
+            uint64_t hig64;
+            uint64_t low64;
+        } parts;
+    };
+} ND_UUID;
+
+#ifdef __GNUC__
+#define ND_UUID_DEFINE(name,u0,u1,u2,u3,u4,u5,u6,u7,u8,u9,u10,u11,u12,u13,u14,u15) \
+	static const nd_uuid_t name __attribute__ ((unused)) = {u0,u1,u2,u3,u4,u5,u6,u7,u8,u9,u10,u11,u12,u13,u14,u15}
+#else
+#define ND_UUID_DEFINE(name,u0,u1,u2,u3,u4,u5,u6,u7,u8,u9,u10,u11,u12,u13,u14,u15) \
+	static const nd_uuid_t name = {u0,u1,u2,u3,u4,u5,u6,u7,u8,u9,u10,u11,u12,u13,u14,u15}
+#endif
+
+static const ND_UUID UUID_ZERO = (ND_UUID){ { .parts = { .hig64 = 0, .low64 = 0 } }};
+ND_UUID_DEFINE(streaming_from_child_msgid, 0xed,0x4c,0xdb, 0x8f, 0x1b, 0xeb, 0x4a, 0xd3, 0xb5, 0x7c, 0xb3, 0xca, 0xe2, 0xd1, 0x62, 0xfa);
+ND_UUID_DEFINE(streaming_to_parent_msgid, 0x6e, 0x2e, 0x38, 0x39, 0x06, 0x76, 0x48, 0x96, 0x8b, 0x64, 0x60, 0x45, 0xdb, 0xf2, 0x8d, 0x66);
+ND_UUID_DEFINE(health_alert_transition_msgid, 0x9c, 0xe0, 0xcb, 0x58, 0xab, 0x8b, 0x44, 0xdf, 0x82, 0xc4, 0xbf, 0x1a, 0xd9, 0xee, 0x22, 0xde);
+
+// this is also defined in alarm-notify.sh.in
+ND_UUID_DEFINE(health_alert_notification_msgid, 0x6d, 0xb0, 0x01, 0x8e, 0x83, 0xe3, 0x43, 0x20, 0xae, 0x2a, 0x65, 0x9d, 0x78, 0x01, 0x9f, 0xb7);
+
+ND_UUID UUID_generate_from_hash(const void *payload, size_t payload_len);
+
+#define UUIDeq(a, b) ((a).parts.hig64 == (b).parts.hig64 && (a).parts.low64 == (b).parts.low64)
+
+static inline ND_UUID uuid2UUID(const nd_uuid_t uu1) {
+    // uu1 may not be aligned, so copy it to the output
+    ND_UUID copy;
+    memcpy(copy.uuid, uu1, sizeof(nd_uuid_t));
+    return copy;
+}
+
+#ifndef UUID_STR_LEN
+// CentOS 7 has older version that doesn't define this
+// same goes for MacOS
+#define UUID_STR_LEN	37
+#endif
+
+#define UUID_COMPACT_STR_LEN 33
+
+void uuid_unparse_lower_compact(const nd_uuid_t uuid, char *out);
+int uuid_parse_compact(const char *in, nd_uuid_t uuid);
+
+int uuid_parse_flexi(const char *in, nd_uuid_t uuid);
+#define uuid_parse(in, uuid) uuid_parse_flexi(in, uuid)
+
+static inline int hex_char_to_int(char c) {
+    if (c >= '0' && c <= '9') return c - '0';
+    if (c >= 'a' && c <= 'f') return c - 'a' + 10;
+    if (c >= 'A' && c <= 'F') return c - 'A' + 10;
+    return -1; // Invalid hexadecimal character
+}
+
+static inline void nd_uuid_clear(nd_uuid_t uu) {
+    memset(uu, 0, sizeof(nd_uuid_t));
+}
+
+// Netdata does not need to sort UUIDs lexicographically and this kind
+// of sorting does not need to be portable between little/big endian.
+// So, any kind of sorting will work, as long as it compares UUIDs.
+// The fastest possible, is good enough.
+static inline int nd_uuid_compare(const nd_uuid_t uu1, const nd_uuid_t uu2) {
+    // IMPORTANT:
+    // uu1 or uu2 may not be aligned to word boundaries on this call,
+    // so casting this to a struct may give SIGBUS on some architectures.
+    return memcmp(uu1, uu2, sizeof(nd_uuid_t));
+}
+
+static inline void nd_uuid_copy(nd_uuid_t dst, const nd_uuid_t src) {
+    memcpy(dst, src, sizeof(nd_uuid_t));
+}
+
+static inline bool nd_uuid_eq(const nd_uuid_t uu1, const nd_uuid_t uu2) {
+    return nd_uuid_compare(uu1, uu2) == 0;
+}
+
+static inline int nd_uuid_is_null(const nd_uuid_t uu) {
+    return nd_uuid_compare(uu, UUID_ZERO.uuid) == 0;
+}
+
+void nd_uuid_unparse_lower(const nd_uuid_t uuid, char *out);
+void nd_uuid_unparse_upper(const nd_uuid_t uuid, char *out);
+
+#define uuid_is_null(uu) nd_uuid_is_null(uu)
+#define uuid_clear(uu) nd_uuid_clear(uu)
+#define uuid_compare(uu1, uu2) nd_uuid_compare(uu1, uu2)
+#define uuid_copy(dst, src) nd_uuid_copy(dst, src)
+#define uuid_eq(uu1, uu2) nd_uuid_eq(uu1, uu2)
+
+#define uuid_generate(out) os_uuid_generate(out)
+#define uuid_generate_random(out) os_uuid_generate_random(out)
+#define uuid_generate_time(out) os_uuid_generate_time(out)
+
+#define uuid_unparse(uu, out) nd_uuid_unparse_lower(uu, out)
+#define uuid_unparse_lower(uu, out) nd_uuid_unparse_lower(uu, out)
+#define uuid_unparse_upper(uu, out) nd_uuid_unparse_upper(uu, out)
+
+#endif //NETDATA_UUID_H