uuid functions

src/lib/Makefile.am

@@ -29,6 +29,7 @@ liblumi_a_SOURCES = \
 	$(liblumi_a_srcdir)/rwlock.c \
 	$(liblumi_a_srcdir)/condition.c \
 	$(liblumi_a_srcdir)/references.c \
+	$(liblumi_a_srcdir)/uuid.c \
 	$(liblumi_a_srcdir)/safeclib.c
 
 
@@ -42,5 +43,6 @@ noinst_HEADERS += \
 	$(liblumi_a_srcdir)/rwlock.h \
 	$(liblumi_a_srcdir)/condition.h \
 	$(liblumi_a_srcdir)/references.h \
+	$(liblumi_a_srcdir)/uuid.h \
 	$(liblumi_a_srcdir)/safeclib.h
 

src/lib/uuid.c

@@ -0,0 +1,94 @@
+/*
+  uuid  -  Universal unique identifiers
+
+  Copyright (C)         CinelerraCV
+    2008,               Christian Thaeter <ct@pipapo.org>
+
+  This program is free software; you can redistribute it and/or
+  modify it under the terms of the GNU General Public License as
+  published by the Free Software Foundation; either version 2 of the
+  License, or (at your option) any later version.
+
+  This program is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with this program; if not, write to the Free Software
+  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+*/
+
+#include "uuid.h"
+
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <time.h>
+#include <fcntl.h>
+#include <unistd.h>
+
+void
+lumiera_uuid_set_ptr (lumiera_uuid* uuid, void* ptr)
+{
+  memset (uuid, 0, 16);
+  *(void**)uuid = ptr;
+}
+
+
+void*
+lumiera_uuid_ptr_get (lumiera_uuid* uuid)
+{
+  return *(void**)uuid;
+}
+
+
+void
+lumiera_uuid_gen (lumiera_uuid* uuid)
+{
+  static int fd = -2;
+  if (!uuid)
+    return;
+
+  if (fd == -2)
+    {
+      fd = open ("/dev/urandom", O_RDONLY);
+      if (fd == -1)
+        fd = open ("/dev/random", O_RDONLY);
+      if (fd >= 0)
+        fcntl (fd, F_SETFD, FD_CLOEXEC);
+      else
+        srand (getpid () + time (NULL));
+    }
+  if (fd < 0)
+    {
+      for (int i = 0; i < 16; ++i)
+        ((unsigned char*)uuid)[i] = (unsigned char)(rand()>>7);
+    }
+  else
+    {
+      if (read (fd, uuid, 16) < 0)
+        abort ();
+    }
+}
+
+
+void
+lumiera_uuid_copy (lumiera_uuid* dest, lumiera_uuid* src)
+{
+  memcpy (dest, src, 16);
+}
+
+
+int
+lumiera_uuid_eq (lumiera_uuid* uuida, lumiera_uuid* uuidb)
+{
+  return !memcmp (uuida, uuidb, 16);
+}
+
+size_t
+lumiera_uuid_hash (lumiera_uuid* uuid)
+{
+  return *(size_t*)uuid;
+}
+
+

src/lib/uuid.h

@@ -0,0 +1,66 @@
+/*
+  uuid  -  Universal unique identifiers
+
+  Copyright (C)         CinelerraCV
+    2008,               Christian Thaeter <ct@pipapo.org>
+
+  This program is free software; you can redistribute it and/or
+  modify it under the terms of the GNU General Public License as
+  published by the Free Software Foundation; either version 2 of the
+  License, or (at your option) any later version.
+
+  This program is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with this program; if not, write to the Free Software
+  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+*/
+#ifndef LUMIERA_UUID_H
+#define LUMIERA_UUID_H
+#include "lumiera.h"
+
+typedef unsigned char lumiera_uuid[16];
+
+/**
+ * Retrieve a generic pointer stored in a uuid
+ */
+void*
+lumiera_uuid_ptr_get (lumiera_uuid* uuid);
+
+/**
+ * Generate a new uuid
+ */
+void
+lumiera_uuid_gen (lumiera_uuid* uuid);
+
+/**
+ * Store a generic pointer in a uuid
+ */
+void
+lumiera_uuid_set_ptr (lumiera_uuid* uuid, void* ptr);
+
+
+/**
+ * Copy an uuid
+ */
+void
+lumiera_uuid_copy (lumiera_uuid* dest, lumiera_uuid* src);
+
+
+/**
+ * Test 2 uuid's for equality
+ */
+int
+lumiera_uuid_eq (lumiera_uuid* uuida, lumiera_uuid* uuidb);
+
+
+/**
+ * Generate a hashsum over an uuid
+ */
+size_t
+lumiera_uuid_hash (lumiera_uuid* uuid);
+
+#endif

tests/15uuid.tests

@@ -0,0 +1,15 @@
+TESTING "UUID's" ./test-uuid
+
+TEST "uuid generate" uuidgen_2 <<END
+out: 0
+END
+
+TEST "uuid copy" uuidgen_copy <<END
+out: 1
+END
+
+TEST "storing pointers" ptrs <<END
+out: 1
+END
+
+

tests/Makefile.am

@@ -36,6 +36,11 @@ test_llist_SOURCES = $(tests_srcdir)/library/test-llist.c
 test_llist_CPPFLAGS = $(AM_CPPFLAGS) -std=gnu99 -Wall -Werror -I$(top_srcdir)/src/
 test_llist_LDADD = liblumi.a -lnobugmt -lpthread -ldl -lm
 
+check_PROGRAMS += test-uuid
+test_uuid_SOURCES = $(tests_srcdir)/library/test-uuid.c
+test_uuid_CPPFLAGS = $(AM_CPPFLAGS) -std=gnu99 -Wall -Werror -I$(top_srcdir)/src/
+test_uuid_LDADD = $(builddir)/liblumi.a -lnobugmt -lpthread -ldl -lm
+
 check_PROGRAMS += test-references
 test_references_SOURCES = $(tests_srcdir)/library/test-references.c
 test_references_CPPFLAGS = $(AM_CPPFLAGS) -std=gnu99 -Wall -Werror -I$(top_srcdir)/src/

tests/library/test-uuid.c

@@ -0,0 +1,71 @@
+/*
+  test-uuid.c  -  test the uuid lib
+
+  Copyright (C)         CinelerraCV
+    2007,               Christian Thaeter <ct@pipapo.org>
+
+  This program is free software; you can redistribute it and/or
+  modify it under the terms of the GNU General Public License as
+  published by the Free Software Foundation; either version 2 of the
+  License, or (at your option) any later version.
+
+  This program is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with this program; if not, write to the Free Software
+  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+*/
+//#include "cinelerra-config.h"
+
+//#include <stdio.h>
+//#include <string.h>
+
+#include "lib/uuid.h"
+
+//CINELERRA_ERROR_DEFINE(TEST, "test error");
+
+int
+main (int argc, char** argv)
+{
+  NOBUG_INIT;
+
+  if (argc == 1)
+    return 0;
+
+  if (!strcmp(argv[1], "uuidgen_2"))
+    {
+      lumiera_uuid uuid1;
+      lumiera_uuid uuid2;
+
+      lumiera_uuid_gen (&uuid1);
+      lumiera_uuid_gen (&uuid2);
+
+      printf ("%d\n", lumiera_uuid_eq (&uuid2, &uuid1));
+    }
+  else if (!strcmp(argv[1], "uuidgen_copy"))
+    {
+      lumiera_uuid uuid1;
+      lumiera_uuid uuid2;
+
+      lumiera_uuid_gen (&uuid1);
+
+      lumiera_uuid_copy (&uuid2, &uuid1);
+
+      printf ("%d\n", lumiera_uuid_eq (&uuid2, &uuid1));
+    }
+  else if (!strcmp(argv[1], "ptrs"))
+    {
+      lumiera_uuid uuid;
+
+      lumiera_uuid_set_ptr (&uuid, &uuid);
+
+      printf ("%d\n", lumiera_uuid_ptr_get (&uuid) == &uuid);
+    }
+  else
+    return 1;
+
+  return 0;
+}