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/*
* uuid_time.c --- Interpret the time field from a uuid. This program
* violates the UUID abstraction barrier by reaching into the guts
* of a UUID and interpreting it.
*
* Copyright (C) 1998, 1999 Theodore Ts'o.
*
* %Begin-Header%
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, and the entire permission notice in its entirety,
* including the disclaimer of warranties.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote
* products derived from this software without specific prior
* written permission.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, ALL OF
* WHICH ARE HEREBY DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
* USE OF THIS SOFTWARE, EVEN IF NOT ADVISED OF THE POSSIBILITY OF SUCH
* DAMAGE.
* %End-Header%
*/
#ifdef _WIN32
#define _WIN32_WINNT 0x0500
#include <windows.h>
#define UUID MYUUID
#endif
#include <errno.h>
#include <stdio.h>
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#include <stdlib.h>
#include <sys/types.h>
#ifdef HAVE_SYS_TIME_H
#include <sys/time.h>
#endif
#include <time.h>
#include "uuidP.h"
#undef uuid_time
/* prototype to make compiler happy */
time_t __uuid_time(const uuid_t uu, struct timeval *ret_tv);
/* this function could be 32bit time_t and 32bit timeval or 64bit,
depending on compiler flags and architecture. */
time_t __uuid_time(const uuid_t uu, struct timeval *ret_tv)
{
struct timeval tv;
struct uuid uuid;
uint32_t high;
uint64_t clock_reg;
uuid_unpack(uu, &uuid);
high = uuid.time_mid | ((uuid.time_hi_and_version & 0xFFF) << 16);
clock_reg = uuid.time_low | ((uint64_t) high << 32);
clock_reg -= (((uint64_t) 0x01B21DD2) << 32) + 0x13814000;
tv.tv_sec = clock_reg / 10000000;
tv.tv_usec = (clock_reg % 10000000) / 10;
if (ret_tv)
*ret_tv = tv;
return tv.tv_sec;
}
#if defined(__USE_TIME_BITS64) && defined(__GLIBC__)
extern time_t uuid_time64(const uuid_t uu, struct timeval *ret_tv) __attribute__((weak, alias("__uuid_time")));
#else
extern time_t uuid_time(const uuid_t uu, struct timeval *ret_tv) __attribute__((weak, alias("__uuid_time")));
#endif
#if defined(__USE_TIME_BITS64) && defined(__GLIBC__)
struct timeval32
{
int32_t tv_sec;
int32_t tv_usec;
};
/* prototype to make compiler happy */
int32_t __uuid_time32(const uuid_t uu, struct timeval32 *ret_tv);
/* Check whether time fits in 32bit time_t. */
static inline int
in_time32_t_range(time_t t)
{
int32_t s;
s = t;
return s == t;
}
int32_t __uuid_time32(const uuid_t uu, struct timeval32 *ret_tv)
{
struct timeval tv;
time_t ret_time = __uuid_time(uu, &tv);
if (! in_time32_t_range(ret_time)) {
ret_tv->tv_sec = -1;
ret_tv->tv_usec = -1;
errno = EOVERFLOW;
return -1;
}
if (ret_tv) {
ret_tv->tv_sec = tv.tv_sec;
ret_tv->tv_usec = tv.tv_usec;
}
return tv.tv_sec;
}
extern int32_t uuid_time(const uuid_t uu, struct timeval32 *ret_tv) __attribute__((weak, alias("__uuid_time32")));
#endif
int uuid_type(const uuid_t uu)
{
struct uuid uuid;
uuid_unpack(uu, &uuid);
return ((uuid.time_hi_and_version >> 12) & 0xF);
}
int uuid_variant(const uuid_t uu)
{
struct uuid uuid;
int var;
uuid_unpack(uu, &uuid);
var = uuid.clock_seq;
if ((var & 0x8000) == 0)
return UUID_VARIANT_NCS;
if ((var & 0x4000) == 0)
return UUID_VARIANT_DCE;
if ((var & 0x2000) == 0)
return UUID_VARIANT_MICROSOFT;
return UUID_VARIANT_OTHER;
}
#ifdef DEBUG
static const char *variant_string(int variant)
{
switch (variant) {
case UUID_VARIANT_NCS:
return "NCS";
case UUID_VARIANT_DCE:
return "DCE";
case UUID_VARIANT_MICROSOFT:
return "Microsoft";
default:
return "Other";
}
}
int
main(int argc, char **argv)
{
uuid_t buf;
time_t time_reg;
struct timeval tv;
int type, variant;
if (argc != 2) {
fprintf(stderr, "Usage: %s uuid\n", argv[0]);
exit(1);
}
if (uuid_parse(argv[1], buf)) {
fprintf(stderr, "Invalid UUID: %s\n", argv[1]);
exit(1);
}
variant = uuid_variant(buf);
type = uuid_type(buf);
time_reg = uuid_time(buf, &tv);
printf("UUID variant is %d (%s)\n", variant, variant_string(variant));
if (variant != UUID_VARIANT_DCE) {
printf("Warning: This program only knows how to interpret "
"DCE UUIDs.\n\tThe rest of the output is likely "
"to be incorrect!!\n");
}
printf("UUID type is %d", type);
switch (type) {
case 1:
printf(" (time based)\n");
break;
case 2:
printf(" (DCE)\n");
break;
case 3:
printf(" (name-based)\n");
break;
case 4:
printf(" (random)\n");
break;
default:
printf("\n");
}
if (type != 1) {
printf("Warning: not a time-based UUID, so UUID time "
"decoding will likely not work!\n");
}
printf("UUID time is: (%"PRId64", %"PRId64"): %s\n",
(int64_t)tv.tv_sec, (int64_t)tv.tv_usec, ctime(&time_reg));
return 0;
}
#endif
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