Copy the KDE 3.5 branch to branches/trinity for new KDE 3.5 features.

BUG:215923


git-svn-id: svn://anonsvn.kde.org/home/kde/branches/trinity/kdenetwork@1054174 283d02a7-25f6-0310-bc7c-ecb5cbfe19da

1 files changed, 245 insertions, 0 deletions

diff --git a/krfb/srvloc/uuid.cpp b/krfb/srvloc/uuid.cpp
new file mode 100644
index 00000000..61f78d86
--- /dev/null
+++ b/krfb/srvloc/uuid.cpp
@@ -0,0 +1,245 @@
+/*
+ * libuuid - library for generating UUIDs
+ * 
+ * Copyright (C) 1996, 1997, 1998, 1999 Theodore Ts'o.
+ * Copyright (C) 2002 Tim Jansen
+ *
+ * %Begin-Header%
+ * This file may be redistributed under the terms of the GNU 
+ * Library General Public License.
+ * %End-Header%
+ *
+ * 2002-12-15, tim@tjansen.de: 
+ *   merged all *.c files, 
+ *   replaced all function that are not needed to generate a time uuid,
+ *   added createUUID()
+ */
+
+#include "uuid.h"
+
+#include <string.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <ctype.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <sys/types.h>
+#include <sys/time.h>
+#include <time.h>
+
+#ifndef _SVID_SOURCE
+#define _SVID_SOURCE
+#endif
+
+#include <fcntl.h>
+#include <errno.h>
+#ifdef HAVE_SRANDOM
+#define srand(x) 	srandom(x)
+#define rand() 		random()
+#endif
+
+typedef unsigned char uuid_t[16];
+typedef unsigned char __u8;
+typedef unsigned short __u16;
+typedef unsigned int __u32;
+
+
+struct uuid {
+        __u32   time_low;
+        __u16   time_mid;
+        __u16   time_hi_and_version;
+        __u16   clock_seq;
+        __u8    node[6];
+};
+
+void uuid_unpack(const uuid_t in, struct uuid *uu)
+{
+        const __u8      *ptr = in;
+        __u32           tmp;
+
+        tmp = *ptr++;
+        tmp = (tmp << 8) | *ptr++;
+        tmp = (tmp << 8) | *ptr++;
+        tmp = (tmp << 8) | *ptr++;
+        uu->time_low = tmp;
+
+        tmp = *ptr++;
+        tmp = (tmp << 8) | *ptr++;
+        uu->time_mid = tmp;
+
+        tmp = *ptr++;
+        tmp = (tmp << 8) | *ptr++;
+        uu->time_hi_and_version = tmp;
+
+        tmp = *ptr++;
+        tmp = (tmp << 8) | *ptr++;
+        uu->clock_seq = tmp;
+
+        memcpy(uu->node, ptr, 6);
+}
+
+static int get_random_fd(void)
+{
+	struct timeval	tv;
+	static int	fd = -2;
+	int		i;
+
+	if (fd == -2) {
+		gettimeofday(&tv, 0);
+		fd = open("/dev/urandom", O_RDONLY);
+		if (fd == -1)
+			fd = open("/dev/random", O_RDONLY | O_NONBLOCK);
+		srand((getpid() << 16) ^ getuid() ^ tv.tv_sec ^ tv.tv_usec);
+	}
+	/* Crank the random number generator a few times */
+	gettimeofday(&tv, 0);
+	for (i = (tv.tv_sec ^ tv.tv_usec) & 0x1F; i > 0; i--)
+		rand();
+	return fd;
+}
+
+
+/*
+ * Generate a series of random bytes.  Use /dev/urandom if possible,
+ * and if not, use srandom/random.
+ */
+static void get_random_bytes(void *buf, int nbytes)
+{
+	int i, fd = get_random_fd();
+	int lose_counter = 0;
+	char *cp = (char *) buf;
+
+	if (fd >= 0) {
+		while (nbytes > 0) {
+			i = read(fd, cp, nbytes);
+			if (i <= 0) {
+				if (lose_counter++ > 16)
+					break;
+				continue;
+			}
+			nbytes -= i;
+			cp += i;
+			lose_counter = 0;
+		}
+	}
+
+	/* XXX put something better here if no /dev/random! */
+	for (i = 0; i < nbytes; i++)
+		*cp++ = rand() & 0xFF;
+	return;
+}
+
+
+/* Assume that the gettimeofday() has microsecond granularity */
+#define MAX_ADJUSTMENT 10
+
+static int get_clock(__u32 *clock_high, __u32 *clock_low, __u16 *ret_clock_seq)
+{
+	static int			adjustment = 0;
+	static struct timeval		last = {0, 0};
+	static __u16			clock_seq;
+	struct timeval 			tv;
+	unsigned long long		clock_reg;
+	
+try_again:
+	gettimeofday(&tv, 0);
+	if ((last.tv_sec == 0) && (last.tv_usec == 0)) {
+		get_random_bytes(&clock_seq, sizeof(clock_seq));
+		clock_seq &= 0x1FFF;
+		last = tv;
+		last.tv_sec--;
+	}
+	if ((tv.tv_sec < last.tv_sec) ||
+	    ((tv.tv_sec == last.tv_sec) &&
+	     (tv.tv_usec < last.tv_usec))) {
+		clock_seq = (clock_seq+1) & 0x1FFF;
+		adjustment = 0;
+		last = tv;
+	} else if ((tv.tv_sec == last.tv_sec) &&
+	    (tv.tv_usec == last.tv_usec)) {
+		if (adjustment >= MAX_ADJUSTMENT)
+			goto try_again;
+		adjustment++;
+	} else {
+		adjustment = 0;
+		last = tv;
+	}
+		
+	clock_reg = tv.tv_usec*10 + adjustment;
+	clock_reg += ((unsigned long long) tv.tv_sec)*10000000;
+	clock_reg += (((unsigned long long) 0x01B21DD2) << 32) + 0x13814000;
+
+	*clock_high = clock_reg >> 32;
+	*clock_low = clock_reg;
+	*ret_clock_seq = clock_seq;
+	return 0;
+}
+
+static void uuid_pack(const struct uuid *uu, uuid_t ptr)
+{
+	__u32	tmp;
+	unsigned char	*out = ptr;
+
+	tmp = uu->time_low;
+	out[3] = (unsigned char) tmp;
+	tmp >>= 8;
+	out[2] = (unsigned char) tmp;
+	tmp >>= 8;
+	out[1] = (unsigned char) tmp;
+	tmp >>= 8;
+	out[0] = (unsigned char) tmp;
+	
+	tmp = uu->time_mid;
+	out[5] = (unsigned char) tmp;
+	tmp >>= 8;
+	out[4] = (unsigned char) tmp;
+
+	tmp = uu->time_hi_and_version;
+	out[7] = (unsigned char) tmp;
+	tmp >>= 8;
+	out[6] = (unsigned char) tmp;
+
+	tmp = uu->clock_seq;
+	out[9] = (unsigned char) tmp;
+	tmp >>= 8;
+	out[8] = (unsigned char) tmp;
+
+	memcpy(out+10, uu->node, 6);
+}
+
+static void uuid_generate_time(uuid_t out)
+{
+	static unsigned char node_id[6];
+	struct uuid uu;
+	__u32	clock_mid;
+
+	get_random_bytes(node_id, 6);
+	get_clock(&clock_mid, &uu.time_low, &uu.clock_seq);
+	uu.clock_seq |= 0x8000;
+	uu.time_mid = (__u16) clock_mid;
+	uu.time_hi_and_version = (clock_mid >> 16) | 0x1000;
+	memcpy(uu.node, node_id, 6);
+	uuid_pack(&uu, out);
+}
+
+static void uuid_unparse(const uuid_t uu, char *out)
+{
+	struct uuid uuid;
+
+	uuid_unpack(uu, &uuid);
+	sprintf(out,
+		"%08x-%04x-%04x-%02x%02x-%02x%02x%02x%02x%02x%02x",
+		uuid.time_low, uuid.time_mid, uuid.time_hi_and_version,
+		uuid.clock_seq >> 8, uuid.clock_seq & 0xFF,
+		uuid.node[0], uuid.node[1], uuid.node[2],
+		uuid.node[3], uuid.node[4], uuid.node[5]);
+}
+
+QString createUUID() {
+	char s[37];
+	uuid_t uu;
+	uuid_generate_time(uu);
+	uuid_unparse(uu, s);
+	return QString(s);
+}
+