3.1

1 files changed, 1217 insertions, 0 deletions

diff --git a/shared/ossp_uuid/uuid.c b/shared/ossp_uuid/uuid.c
new file mode 100644
index 00000000..1889a728
--- /dev/null
+++ b/shared/ossp_uuid/uuid.c
@@ -0,0 +1,1217 @@
+/*
+**  OSSP uuid - Universally Unique Identifier
+**  Copyright (c) 2004-2008 Ralf S. Engelschall <rse@engelschall.com>
+**  Copyright (c) 2004-2008 The OSSP Project <http://www.ossp.org/>
+**
+**  This file is part of OSSP uuid, a library for the generation
+**  of UUIDs which can found at http://www.ossp.org/pkg/lib/uuid/
+**
+**  Permission to use, copy, modify, and distribute this software for
+**  any purpose with or without fee is hereby granted, provided that
+**  the above copyright notice and this permission notice appear in all
+**  copies.
+**
+**  THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
+**  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+**  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+**  IN NO EVENT SHALL THE AUTHORS AND COPYRIGHT HOLDERS AND THEIR
+**  CONTRIBUTORS 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 ADVISED OF THE POSSIBILITY OF
+**  SUCH DAMAGE.
+**
+**  uuid.c: library API implementation
+*/
+
+/* own headers (part 1/2) */
+#include "uuid.h"
+#include "uuid_ac.h"
+
+/* system headers */
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdarg.h>
+#include <string.h>
+#include <unistd.h>
+#include <ctype.h>
+#include <fcntl.h>
+#include <time.h>
+#include <sys/time.h>
+#include <sys/types.h>
+
+/* own headers (part 2/2) */
+#include "uuid_vers.h"
+#include "uuid_md5.h"
+#include "uuid_sha1.h"
+#include "uuid_prng.h"
+#include "uuid_mac.h"
+#include "uuid_time.h"
+#include "uuid_ui64.h"
+#include "uuid_ui128.h"
+#include "uuid_str.h"
+#include "uuid_bm.h"
+#include "uuid_ac.h"
+
+/* maximum number of 100ns ticks of the actual resolution of system clock
+   (which in our case is 1us (= 1000ns) because we use gettimeofday(2) */
+#define UUIDS_PER_TICK 10
+
+/* time offset between UUID and Unix Epoch time according to standards.
+   (UUID UTC base time is October 15, 1582
+    Unix UTC base time is January  1, 1970) */
+#define UUID_TIMEOFFSET "01B21DD213814000"
+
+/* IEEE 802 MAC address encoding/decoding bit fields */
+#define IEEE_MAC_MCBIT BM_OCTET(0,0,0,0,0,0,0,1)
+#define IEEE_MAC_LOBIT BM_OCTET(0,0,0,0,0,0,1,0)
+
+/* IEEE 802 MAC address octet length */
+#define IEEE_MAC_OCTETS 6
+
+/* UUID binary representation according to UUID standards */
+typedef struct {
+    uuid_uint32_t  time_low;                  /* bits  0-31 of time field */
+    uuid_uint16_t  time_mid;                  /* bits 32-47 of time field */
+    uuid_uint16_t  time_hi_and_version;       /* bits 48-59 of time field plus 4 bit version */
+    uuid_uint8_t   clock_seq_hi_and_reserved; /* bits  8-13 of clock sequence field plus 2 bit variant */
+    uuid_uint8_t   clock_seq_low;             /* bits  0-7  of clock sequence field */
+    uuid_uint8_t   node[IEEE_MAC_OCTETS];     /* bits  0-47 of node MAC address */
+} uuid_obj_t;
+
+/* abstract data type (ADT) of API */
+struct uuid_st {
+    uuid_obj_t     obj;                       /* inlined UUID object */
+    prng_t        *prng;                      /* RPNG sub-object */
+    md5_t         *md5;                       /* MD5 sub-object */
+    sha1_t        *sha1;                      /* SHA-1 sub-object */
+    uuid_uint8_t   mac[IEEE_MAC_OCTETS];      /* pre-determined MAC address */
+    struct timeval time_last;                 /* last retrieved timestamp */
+    unsigned long  time_seq;                  /* last timestamp sequence counter */
+};
+
+/* create UUID object */
+uuid_rc_t uuid_create(uuid_t **uuid)
+{
+    uuid_t *obj;
+
+    /* argument sanity check */
+    if (uuid == NULL)
+        return UUID_RC_ARG;
+
+    /* allocate UUID object */
+    if ((obj = (uuid_t *)malloc(sizeof(uuid_t))) == NULL)
+        return UUID_RC_MEM;
+
+    /* create PRNG, MD5 and SHA1 sub-objects */
+    if (prng_create(&obj->prng) != PRNG_RC_OK) {
+        free(obj);
+        return UUID_RC_INT;
+    }
+    if (md5_create(&obj->md5) != MD5_RC_OK) {
+        (void)prng_destroy(obj->prng);
+        free(obj);
+        return UUID_RC_INT;
+    }
+    if (sha1_create(&obj->sha1) != SHA1_RC_OK) {
+        (void)md5_destroy(obj->md5);
+        (void)prng_destroy(obj->prng);
+        free(obj);
+        return UUID_RC_INT;
+    }
+
+    /* set UUID object initially to "Nil UUID" */
+    if (uuid_load(obj, "nil") != UUID_RC_OK) {
+        (void)sha1_destroy(obj->sha1);
+        (void)md5_destroy(obj->md5);
+        (void)prng_destroy(obj->prng);
+        free(obj);
+        return UUID_RC_INT;
+    }
+
+    /* resolve MAC address for insertion into node field of UUIDs */
+    if (!mac_address((unsigned char *)(obj->mac), sizeof(obj->mac))) {
+        memset(obj->mac, 0, sizeof(obj->mac));
+        obj->mac[0] = BM_OCTET(1,0,0,0,0,0,0,0);
+    }
+
+    /* initialize time attributes */
+    obj->time_last.tv_sec  = 0;
+    obj->time_last.tv_usec = 0;
+    obj->time_seq = 0;
+
+    /* store result object */
+    *uuid = obj;
+
+    return UUID_RC_OK;
+}
+
+/* destroy UUID object */
+uuid_rc_t uuid_destroy(uuid_t *uuid)
+{
+    /* argument sanity check */
+    if (uuid == NULL)
+        return UUID_RC_ARG;
+
+    /* destroy PRNG, MD5 and SHA-1 sub-objects */
+    (void)prng_destroy(uuid->prng);
+    (void)md5_destroy(uuid->md5);
+    (void)sha1_destroy(uuid->sha1);
+
+    /* free UUID object */
+    free(uuid);
+
+    return UUID_RC_OK;
+}
+
+/* clone UUID object */
+uuid_rc_t uuid_clone(const uuid_t *uuid, uuid_t **clone)
+{
+    uuid_t *obj;
+
+    /* argument sanity check */
+    if (uuid == NULL || uuid_clone == NULL)
+        return UUID_RC_ARG;
+
+    /* allocate UUID object */
+    if ((obj = (uuid_t *)malloc(sizeof(uuid_t))) == NULL)
+        return UUID_RC_MEM;
+
+    /* clone entire internal state */
+    memcpy(obj, uuid, sizeof(uuid_t));
+
+    /* re-initialize with new PRNG, MD5 and SHA1 sub-objects */
+    if (prng_create(&obj->prng) != PRNG_RC_OK) {
+        free(obj);
+        return UUID_RC_INT;
+    }
+    if (md5_create(&obj->md5) != MD5_RC_OK) {
+        (void)prng_destroy(obj->prng);
+        free(obj);
+        return UUID_RC_INT;
+    }
+    if (sha1_create(&obj->sha1) != SHA1_RC_OK) {
+        (void)md5_destroy(obj->md5);
+        (void)prng_destroy(obj->prng);
+        free(obj);
+        return UUID_RC_INT;
+    }
+
+    /* store result object */
+    *clone = obj;
+
+    return UUID_RC_OK;
+}
+
+/* check whether UUID object represents "Nil UUID" */
+uuid_rc_t uuid_isnil(const uuid_t *uuid, int *result)
+{
+    const unsigned char *ucp;
+    int i;
+
+    /* sanity check argument(s) */
+    if (uuid == NULL || result == NULL)
+        return UUID_RC_ARG;
+
+    /* a "Nil UUID" is defined as all octets zero, so check for this case */
+    *result = UUID_TRUE;
+    for (i = 0, ucp = (unsigned char *)&(uuid->obj); i < UUID_LEN_BIN; i++) {
+        if (*ucp++ != (unsigned char)'\0') {
+            *result = UUID_FALSE;
+            break;
+        }
+    }
+
+    return UUID_RC_OK;
+}
+
+/* compare UUID objects */
+uuid_rc_t uuid_compare(const uuid_t *uuid1, const uuid_t *uuid2, int *result)
+{
+    int r;
+
+    /* argument sanity check */
+    if (result == NULL)
+        return UUID_RC_ARG;
+
+    /* convenience macro for setting result */
+#define RESULT(r) \
+    /*lint -save -e801 -e717*/ \
+    do { \
+        *result = (r); \
+        goto result_exit; \
+    } while (0) \
+    /*lint -restore*/
+
+    /* special cases: NULL or equal UUIDs */
+    if (uuid1 == uuid2)
+        RESULT(0);
+    if (uuid1 == NULL && uuid2 == NULL)
+        RESULT(0);
+    if (uuid1 == NULL)
+        RESULT((uuid_isnil(uuid2, &r) == UUID_RC_OK ? r : 0) ? 0 : -1);
+    if (uuid2 == NULL)
+        RESULT((uuid_isnil(uuid1, &r) == UUID_RC_OK ? r : 0) ? 0 : 1);
+
+    /* standard cases: regular different UUIDs */
+    if (uuid1->obj.time_low != uuid2->obj.time_low)
+        RESULT((uuid1->obj.time_low < uuid2->obj.time_low) ? -1 : 1);
+    if ((r = (int)uuid1->obj.time_mid
+           - (int)uuid2->obj.time_mid) != 0)
+        RESULT((r < 0) ? -1 : 1);
+    if ((r = (int)uuid1->obj.time_hi_and_version
+           - (int)uuid2->obj.time_hi_and_version) != 0)
+        RESULT((r < 0) ? -1 : 1);
+    if ((r = (int)uuid1->obj.clock_seq_hi_and_reserved
+           - (int)uuid2->obj.clock_seq_hi_and_reserved) != 0)
+        RESULT((r < 0) ? -1 : 1);
+    if ((r = (int)uuid1->obj.clock_seq_low
+           - (int)uuid2->obj.clock_seq_low) != 0)
+        RESULT((r < 0) ? -1 : 1);
+    if ((r = memcmp(uuid1->obj.node, uuid2->obj.node, sizeof(uuid1->obj.node))) != 0)
+        RESULT((r < 0) ? -1 : 1);
+
+    /* default case: the keys are equal */
+    *result = 0;
+
+    result_exit:
+    return UUID_RC_OK;
+}
+
+/* INTERNAL: unpack UUID binary presentation into UUID object
+   (allows in-place operation for internal efficiency!) */
+static uuid_rc_t uuid_import_bin(uuid_t *uuid, const void *data_ptr, size_t data_len)
+{
+    const uuid_uint8_t *in;
+    uuid_uint32_t tmp32;
+    uuid_uint16_t tmp16;
+    unsigned int i;
+
+    /* sanity check argument(s) */
+    if (uuid == NULL || data_ptr == NULL || data_len < UUID_LEN_BIN)
+        return UUID_RC_ARG;
+
+    /* treat input data buffer as octet stream */
+    in = (const uuid_uint8_t *)data_ptr;
+
+    /* unpack "time_low" field */
+    tmp32 = (uuid_uint32_t)(*in++);
+    tmp32 = (tmp32 << 8) | (uuid_uint32_t)(*in++);
+    tmp32 = (tmp32 << 8) | (uuid_uint32_t)(*in++);
+    tmp32 = (tmp32 << 8) | (uuid_uint32_t)(*in++);
+    uuid->obj.time_low = tmp32;
+
+    /* unpack "time_mid" field */
+    tmp16 = (uuid_uint16_t)(*in++);
+    tmp16 = (uuid_uint16_t)(tmp16 << 8) | (uuid_uint16_t)(*in++);
+    uuid->obj.time_mid = tmp16;
+
+    /* unpack "time_hi_and_version" field */
+    tmp16 = (uuid_uint16_t)*in++;
+    tmp16 = (uuid_uint16_t)(tmp16 << 8) | (uuid_uint16_t)(*in++);
+    uuid->obj.time_hi_and_version = tmp16;
+
+    /* unpack "clock_seq_hi_and_reserved" field */
+    uuid->obj.clock_seq_hi_and_reserved = *in++;
+
+    /* unpack "clock_seq_low" field */
+    uuid->obj.clock_seq_low = *in++;
+
+    /* unpack "node" field */
+    for (i = 0; i < (unsigned int)sizeof(uuid->obj.node); i++)
+        uuid->obj.node[i] = *in++;
+
+    return UUID_RC_OK;
+}
+
+/* INTERNAL: pack UUID object into binary representation
+   (allows in-place operation for internal efficiency!) */
+static uuid_rc_t uuid_export_bin(const uuid_t *uuid, void *_data_ptr, size_t *data_len)
+{
+    uuid_uint8_t **data_ptr;
+    uuid_uint8_t *out;
+    uuid_uint32_t tmp32;
+    uuid_uint16_t tmp16;
+    unsigned int i;
+
+    /* cast generic data pointer to particular pointer to pointer type */
+    data_ptr = (uuid_uint8_t **)_data_ptr;
+
+    /* sanity check argument(s) */
+    if (uuid == NULL || data_ptr == NULL)
+        return UUID_RC_ARG;
+
+    /* optionally allocate octet data buffer */
+    if (*data_ptr == NULL) {
+        if ((*data_ptr = (uuid_uint8_t *)malloc(sizeof(uuid_t))) == NULL)
+            return UUID_RC_MEM;
+        if (data_len != NULL)
+            *data_len = UUID_LEN_BIN;
+    }
+    else {
+        if (data_len == NULL)
+            return UUID_RC_ARG;
+        if (*data_len < UUID_LEN_BIN)
+            return UUID_RC_MEM;
+        *data_len = UUID_LEN_BIN;
+    }
+
+    /* treat output data buffer as octet stream */
+    out = *data_ptr;
+
+    /* pack "time_low" field */
+    tmp32 = uuid->obj.time_low;
+    out[3] = (uuid_uint8_t)(tmp32 & 0xff); tmp32 >>= 8;
+    out[2] = (uuid_uint8_t)(tmp32 & 0xff); tmp32 >>= 8;
+    out[1] = (uuid_uint8_t)(tmp32 & 0xff); tmp32 >>= 8;
+    out[0] = (uuid_uint8_t)(tmp32 & 0xff);
+
+    /* pack "time_mid" field */
+    tmp16 = uuid->obj.time_mid;
+    out[5] = (uuid_uint8_t)(tmp16 & 0xff); tmp16 >>= 8;
+    out[4] = (uuid_uint8_t)(tmp16 & 0xff);
+
+    /* pack "time_hi_and_version" field */
+    tmp16 = uuid->obj.time_hi_and_version;
+    out[7] = (uuid_uint8_t)(tmp16 & 0xff); tmp16 >>= 8;
+    out[6] = (uuid_uint8_t)(tmp16 & 0xff);
+
+    /* pack "clock_seq_hi_and_reserved" field */
+    out[8] = uuid->obj.clock_seq_hi_and_reserved;
+
+    /* pack "clock_seq_low" field */
+    out[9] = uuid->obj.clock_seq_low;
+
+    /* pack "node" field */
+    for (i = 0; i < (unsigned int)sizeof(uuid->obj.node); i++)
+        out[10+i] = uuid->obj.node[i];
+
+    return UUID_RC_OK;
+}
+
+/* INTERNAL: check for valid UUID string representation syntax */
+static int uuid_isstr(const char *str, size_t str_len)
+{
+    int i;
+    const char *cp;
+
+    /* example reference:
+       f81d4fae-7dec-11d0-a765-00a0c91e6bf6
+       012345678901234567890123456789012345
+       0         1         2         3       */
+    if (str == NULL)
+        return UUID_FALSE;
+    if (str_len == 0)
+        str_len = strlen(str);
+    if (str_len < UUID_LEN_STR)
+        return UUID_FALSE;
+    for (i = 0, cp = str; i < UUID_LEN_STR; i++, cp++) {
+        if ((i == 8) || (i == 13) || (i == 18) || (i == 23)) {
+            if (*cp == '-')
+                continue;
+            else
+                return UUID_FALSE;
+        }
+        if (!isxdigit((int)(*cp)))
+            return UUID_FALSE;
+    }
+    return UUID_TRUE;
+}
+
+/* INTERNAL: import UUID object from string representation */
+static uuid_rc_t uuid_import_str(uuid_t *uuid, const void *data_ptr, size_t data_len)
+{
+    uuid_uint16_t tmp16;
+    const char *cp;
+    char hexbuf[3];
+    const char *str;
+    unsigned int i;
+
+    /* sanity check argument(s) */
+    if (uuid == NULL || data_ptr == NULL || data_len < UUID_LEN_STR)
+        return UUID_RC_ARG;
+
+    /* check for correct UUID string representation syntax */
+    str = (const char *)data_ptr;
+    if (!uuid_isstr(str, 0))
+        return UUID_RC_ARG;
+
+    /* parse hex values of "time" parts */
+    uuid->obj.time_low            = (uuid_uint32_t)strtoul(str,    NULL, 16);
+    uuid->obj.time_mid            = (uuid_uint16_t)strtoul(str+9,  NULL, 16);
+    uuid->obj.time_hi_and_version = (uuid_uint16_t)strtoul(str+14, NULL, 16);
+
+    /* parse hex values of "clock" parts */
+    tmp16 = (uuid_uint16_t)strtoul(str+19, NULL, 16);
+    uuid->obj.clock_seq_low             = (uuid_uint8_t)(tmp16 & 0xff); tmp16 >>= 8;
+    uuid->obj.clock_seq_hi_and_reserved = (uuid_uint8_t)(tmp16 & 0xff);
+
+    /* parse hex values of "node" part */
+    cp = str+24;
+    hexbuf[2] = '\0';
+    for (i = 0; i < (unsigned int)sizeof(uuid->obj.node); i++) {
+        hexbuf[0] = *cp++;
+        hexbuf[1] = *cp++;
+        uuid->obj.node[i] = (uuid_uint8_t)strtoul(hexbuf, NULL, 16);
+    }
+
+    return UUID_RC_OK;
+}
+
+/* INTERNAL: import UUID object from single integer value representation */
+static uuid_rc_t uuid_import_siv(uuid_t *uuid, const void *data_ptr, size_t data_len)
+{
+    const char *str;
+    uuid_uint8_t tmp_bin[UUID_LEN_BIN];
+    ui128_t ui, ui2;
+    uuid_rc_t rc;
+    int i;
+
+    /* sanity check argument(s) */
+    if (uuid == NULL || data_ptr == NULL || data_len < 1)
+        return UUID_RC_ARG;
+
+    /* check for correct UUID single integer value syntax */
+    str = (const char *)data_ptr;
+    for (i = 0; i < (int)data_len; i++)
+        if (!isdigit((int)str[i]))
+            return UUID_RC_ARG;
+
+    /* parse single integer value representation (SIV) */
+    ui = ui128_s2i(str, NULL, 10);
+
+    /* import octets into UUID binary representation */
+    for (i = 0; i < UUID_LEN_BIN; i++) {
+        ui = ui128_rol(ui, 8, &ui2);
+        tmp_bin[i] = (uuid_uint8_t)(ui128_i2n(ui2) & 0xff);
+    }
+
+    /* import into internal UUID representation */
+    if ((rc = uuid_import(uuid, UUID_FMT_BIN, (void *)&tmp_bin, UUID_LEN_BIN)) != UUID_RC_OK)
+        return rc;
+
+    return UUID_RC_OK;
+}
+
+/* INTERNAL: export UUID object to string representation */
+static uuid_rc_t uuid_export_str(const uuid_t *uuid, void *_data_ptr, size_t *data_len)
+{
+    char **data_ptr;
+    char *data_buf;
+
+    /* cast generic data pointer to particular pointer to pointer type */
+    data_ptr = (char **)_data_ptr;
+
+    /* sanity check argument(s) */
+    if (uuid == NULL || data_ptr == NULL)
+        return UUID_RC_ARG;
+
+    /* determine output buffer */
+    if (*data_ptr == NULL) {
+        if ((data_buf = (char *)malloc(UUID_LEN_STR+1)) == NULL)
+            return UUID_RC_MEM;
+        if (data_len != NULL)
+            *data_len = UUID_LEN_STR+1;
+    }
+    else {
+        data_buf = (char *)(*data_ptr);
+        if (data_len == NULL)
+            return UUID_RC_ARG;
+        if (*data_len < UUID_LEN_STR+1)
+            return UUID_RC_MEM;
+        *data_len = UUID_LEN_STR+1;
+    }
+
+    /* format UUID into string representation */
+    if (str_snprintf(data_buf, UUID_LEN_STR+1,
+        "%08lx-%04x-%04x-%02x%02x-%02x%02x%02x%02x%02x%02x",
+        (unsigned long)uuid->obj.time_low,
+        (unsigned int)uuid->obj.time_mid,
+        (unsigned int)uuid->obj.time_hi_and_version,
+        (unsigned int)uuid->obj.clock_seq_hi_and_reserved,
+        (unsigned int)uuid->obj.clock_seq_low,
+        (unsigned int)uuid->obj.node[0],
+        (unsigned int)uuid->obj.node[1],
+        (unsigned int)uuid->obj.node[2],
+        (unsigned int)uuid->obj.node[3],
+        (unsigned int)uuid->obj.node[4],
+        (unsigned int)uuid->obj.node[5]) != UUID_LEN_STR) {
+        if (*data_ptr == NULL)
+            free(data_buf);
+        return UUID_RC_INT;
+    }
+
+    /* pass back new buffer if locally allocated */
+    if (*data_ptr == NULL)
+        *data_ptr = data_buf;
+
+    return UUID_RC_OK;
+}
+
+/* INTERNAL: export UUID object to single integer value representation */
+static uuid_rc_t uuid_export_siv(const uuid_t *uuid, void *_data_ptr, size_t *data_len)
+{
+    char **data_ptr;
+    char *data_buf;
+    void *tmp_ptr;
+    size_t tmp_len;
+    uuid_uint8_t tmp_bin[UUID_LEN_BIN];
+    ui128_t ui, ui2;
+    uuid_rc_t rc;
+    int i;
+
+    /* cast generic data pointer to particular pointer to pointer type */
+    data_ptr = (char **)_data_ptr;
+
+    /* sanity check argument(s) */
+    if (uuid == NULL || data_ptr == NULL)
+        return UUID_RC_ARG;
+
+    /* determine output buffer */
+    if (*data_ptr == NULL) {
+        if ((data_buf = (char *)malloc(UUID_LEN_SIV+1)) == NULL)
+            return UUID_RC_MEM;
+        if (data_len != NULL)
+            *data_len = UUID_LEN_SIV+1;
+    }
+    else {
+        data_buf = (char *)(*data_ptr);
+        if (data_len == NULL)
+            return UUID_RC_ARG;
+        if (*data_len < UUID_LEN_SIV+1)
+            return UUID_RC_MEM;
+        *data_len = UUID_LEN_SIV+1;
+    }
+
+    /* export into UUID binary representation */
+    tmp_ptr = (void *)&tmp_bin;
+    tmp_len = sizeof(tmp_bin);
+    if ((rc = uuid_export(uuid, UUID_FMT_BIN, &tmp_ptr, &tmp_len)) != UUID_RC_OK) {
+        if (*data_ptr == NULL)
+            free(data_buf);
+        return rc;
+    }
+
+    /* import from UUID binary representation */
+    ui = ui128_zero();
+    for (i = 0; i < UUID_LEN_BIN; i++) {
+        ui2 = ui128_n2i((unsigned long)tmp_bin[i]);
+        ui = ui128_rol(ui, 8, NULL);
+        ui = ui128_or(ui, ui2);
+    }
+
+    /* format into single integer value representation */
+    (void)ui128_i2s(ui, data_buf, UUID_LEN_SIV+1, 10);
+
+    /* pass back new buffer if locally allocated */
+    if (*data_ptr == NULL)
+        *data_ptr = data_buf;
+
+    return UUID_RC_OK;
+}
+
+/* decoding tables */
+static struct {
+    uuid_uint8_t num;
+    const char *desc;
+} uuid_dectab_variant[] = {
+    { (uuid_uint8_t)BM_OCTET(0,0,0,0,0,0,0,0), "reserved (NCS backward compatible)" },
+    { (uuid_uint8_t)BM_OCTET(1,0,0,0,0,0,0,0), "DCE 1.1, ISO/IEC 11578:1996" },
+    { (uuid_uint8_t)BM_OCTET(1,1,0,0,0,0,0,0), "reserved (Microsoft GUID)" },
+    { (uuid_uint8_t)BM_OCTET(1,1,1,0,0,0,0,0), "reserved (future use)" }
+};
+static struct {
+    int num;
+    const char *desc;
+} uuid_dectab_version[] = {
+    { 1, "time and node based" },
+    { 3, "name based, MD5" },
+    { 4, "random data based" },
+    { 5, "name based, SHA-1" }
+};
+
+/* INTERNAL: dump UUID object as descriptive text */
+static uuid_rc_t uuid_export_txt(const uuid_t *uuid, void *_data_ptr, size_t *data_len)
+{
+    char **data_ptr;
+    uuid_rc_t rc;
+    char **out;
+    char *out_ptr;
+    size_t out_len;
+    const char *version;
+    const char *variant;
+    char *content;
+    int isnil;
+    uuid_uint8_t tmp8;
+    uuid_uint16_t tmp16;
+    uuid_uint32_t tmp32;
+    uuid_uint8_t tmp_bin[UUID_LEN_BIN];
+    char tmp_str[UUID_LEN_STR+1];
+    char tmp_siv[UUID_LEN_SIV+1];
+    void *tmp_ptr;
+    size_t tmp_len;
+    ui64_t t;
+    ui64_t t_offset;
+    int t_nsec;
+    int t_usec;
+    time_t t_sec;
+    char t_buf[19+1]; /* YYYY-MM-DD HH:MM:SS */
+    struct tm *tm;
+    int i;
+
+    /* cast generic data pointer to particular pointer to pointer type */
+    data_ptr = (char **)_data_ptr;
+
+    /* sanity check argument(s) */
+    if (uuid == NULL || data_ptr == NULL)
+        return UUID_RC_ARG;
+
+    /* initialize output buffer */
+    out_ptr = NULL;
+    out = &out_ptr;
+
+    /* check for special case of "Nil UUID" */
+    if ((rc = uuid_isnil(uuid, &isnil)) != UUID_RC_OK)
+        return rc;
+
+    /* decode into various representations */
+    tmp_ptr = (void *)&tmp_str;
+    tmp_len = sizeof(tmp_str);
+    if ((rc = uuid_export(uuid, UUID_FMT_STR, &tmp_ptr, &tmp_len)) != UUID_RC_OK)
+        return rc;
+    tmp_ptr = (void *)&tmp_siv;
+    tmp_len = sizeof(tmp_siv);
+    if ((rc = uuid_export(uuid, UUID_FMT_SIV, &tmp_ptr, &tmp_len)) != UUID_RC_OK)
+        return rc;
+    (void)str_rsprintf(out, "encode: STR:     %s\n", tmp_str);
+    (void)str_rsprintf(out, "        SIV:     %s\n", tmp_siv);
+
+    /* decode UUID variant */
+    tmp8 = uuid->obj.clock_seq_hi_and_reserved;
+    if (isnil)
+        variant = "n.a.";
+    else {
+        variant = "unknown";
+        for (i = 7; i >= 0; i--) {
+            if ((tmp8 & (uuid_uint8_t)BM_BIT(i,1)) == 0) {
+                tmp8 &= ~(uuid_uint8_t)BM_MASK(i,0);
+                break;
+            }
+        }
+        for (i = 0; i < (int)(sizeof(uuid_dectab_variant)/sizeof(uuid_dectab_variant[0])); i++) {
+            if (uuid_dectab_variant[i].num == tmp8) {
+                variant = uuid_dectab_variant[i].desc;
+                break;
+            }
+        }
+    }
+    (void)str_rsprintf(out, "decode: variant: %s\n", variant);
+
+    /* decode UUID version */
+    tmp16 = (BM_SHR(uuid->obj.time_hi_and_version, 12) & (uuid_uint16_t)BM_MASK(3,0));
+    if (isnil)
+        version = "n.a.";
+    else {
+        version = "unknown";
+        for (i = 0; i < (int)(sizeof(uuid_dectab_version)/sizeof(uuid_dectab_version[0])); i++) {
+            if (uuid_dectab_version[i].num == (int)tmp16) {
+                version = uuid_dectab_version[i].desc;
+                break;
+            }
+        }
+    }
+    str_rsprintf(out, "        version: %d (%s)\n", (int)tmp16, version);
+
+    /*
+     * decode UUID content
+     */
+
+    if (tmp8 == BM_OCTET(1,0,0,0,0,0,0,0) && tmp16 == 1) {
+        /* decode DCE 1.1 version 1 UUID */
+
+        /* decode system time */
+        t = ui64_rol(ui64_n2i((unsigned long)(uuid->obj.time_hi_and_version & BM_MASK(11,0))), 48, NULL),
+        t = ui64_or(t, ui64_rol(ui64_n2i((unsigned long)(uuid->obj.time_mid)), 32, NULL));
+        t = ui64_or(t, ui64_n2i((unsigned long)(uuid->obj.time_low)));
+        t_offset = ui64_s2i(UUID_TIMEOFFSET, NULL, 16);
+        t = ui64_sub(t, t_offset, NULL);
+        t = ui64_divn(t, 10, &t_nsec);
+        t = ui64_divn(t, 1000000, &t_usec);
+        t_sec = (time_t)ui64_i2n(t);
+        tm = gmtime(&t_sec);
+        (void)strftime(t_buf, sizeof(t_buf), "%Y-%m-%d %H:%M:%S", tm);
+        (void)str_rsprintf(out, "        content: time:  %s.%06d.%d UTC\n", t_buf, t_usec, t_nsec);
+
+        /* decode clock sequence */
+        tmp32 = ((uuid->obj.clock_seq_hi_and_reserved & BM_MASK(5,0)) << 8)
+                + uuid->obj.clock_seq_low;
+        (void)str_rsprintf(out, "                 clock: %ld (usually random)\n", (long)tmp32);
+
+        /* decode node MAC address */
+        (void)str_rsprintf(out, "                 node:  %02x:%02x:%02x:%02x:%02x:%02x (%s %s)\n",
+            (unsigned int)uuid->obj.node[0],
+            (unsigned int)uuid->obj.node[1],
+            (unsigned int)uuid->obj.node[2],
+            (unsigned int)uuid->obj.node[3],
+            (unsigned int)uuid->obj.node[4],
+            (unsigned int)uuid->obj.node[5],
+            (uuid->obj.node[0] & IEEE_MAC_LOBIT ? "local" : "global"),
+            (uuid->obj.node[0] & IEEE_MAC_MCBIT ? "multicast" : "unicast"));
+    }
+    else {
+        /* decode anything else as hexadecimal byte-string only */
+
+        /* determine annotational hint */
+        content = "not decipherable: unknown UUID version";
+        if (isnil)
+            content = "special case: DCE 1.1 Nil UUID";
+        else if (tmp16 == 3)
+            content = "not decipherable: MD5 message digest only";
+        else if (tmp16 == 4)
+            content = "no semantics: random data only";
+        else if (tmp16 == 5)
+            content = "not decipherable: truncated SHA-1 message digest only";
+
+        /* pack UUID into binary representation */
+        tmp_ptr = (void *)&tmp_bin;
+        tmp_len = sizeof(tmp_bin);
+        if ((rc = uuid_export(uuid, UUID_FMT_BIN, &tmp_ptr, &tmp_len)) != UUID_RC_OK)
+            return rc;
+
+        /* mask out version and variant parts */
+        tmp_bin[6] &= BM_MASK(3,0);
+        tmp_bin[8] &= BM_MASK(5,0);
+
+        /* dump as colon-seperated hexadecimal byte-string */
+        (void)str_rsprintf(out,
+            "        content: %02X:%02X:%02X:%02X:%02X:%02X:%02X:%02X:%02X:%02X:%02X:%02X:%02X:%02X:%02X:%02X\n"
+            "                 (%s)\n",
+            (unsigned int)tmp_bin[0],  (unsigned int)tmp_bin[1],  (unsigned int)tmp_bin[2],
+            (unsigned int)tmp_bin[3],  (unsigned int)tmp_bin[4],  (unsigned int)tmp_bin[5],
+            (unsigned int)tmp_bin[6],  (unsigned int)tmp_bin[7],  (unsigned int)tmp_bin[8],
+            (unsigned int)tmp_bin[9],  (unsigned int)tmp_bin[10], (unsigned int)tmp_bin[11],
+            (unsigned int)tmp_bin[12], (unsigned int)tmp_bin[13], (unsigned int)tmp_bin[14],
+            (unsigned int)tmp_bin[15], content);
+    }
+
+    /* provide result */
+    out_len = strlen(out_ptr)+1;
+    if (*data_ptr == NULL) {
+        *data_ptr = (void *)out_ptr;
+        if (data_len != NULL)
+            *data_len = out_len;
+    }
+    else {
+        if (data_len == NULL)
+            return UUID_RC_ARG;
+        if (*data_len < out_len)
+            return UUID_RC_MEM;
+        memcpy(*data_ptr, out_ptr, out_len);
+    }
+
+    return UUID_RC_OK;
+}
+
+/* UUID importing */
+uuid_rc_t uuid_import(uuid_t *uuid, uuid_fmt_t fmt, const void *data_ptr, size_t data_len)
+{
+    uuid_rc_t rc;
+
+    /* sanity check argument(s) */
+    if (uuid == NULL || data_ptr == NULL)
+        return UUID_RC_ARG;
+
+    /* dispatch into format-specific functions */
+    switch (fmt) {
+        case UUID_FMT_BIN: rc = uuid_import_bin(uuid, data_ptr, data_len); break;
+        case UUID_FMT_STR: rc = uuid_import_str(uuid, data_ptr, data_len); break;
+        case UUID_FMT_SIV: rc = uuid_import_siv(uuid, data_ptr, data_len); break;
+        case UUID_FMT_TXT: rc = UUID_RC_IMP; /* not implemented */ break;
+        default:           rc = UUID_RC_ARG;
+    }
+
+    return rc;
+}
+
+/* UUID exporting */
+uuid_rc_t uuid_export(const uuid_t *uuid, uuid_fmt_t fmt, void *data_ptr, size_t *data_len)
+{
+    uuid_rc_t rc;
+
+    /* sanity check argument(s) */
+    if (uuid == NULL || data_ptr == NULL)
+        return UUID_RC_ARG;
+
+    /* dispatch into format-specific functions */
+    switch (fmt) {
+        case UUID_FMT_BIN: rc = uuid_export_bin(uuid, data_ptr, data_len); break;
+        case UUID_FMT_STR: rc = uuid_export_str(uuid, data_ptr, data_len); break;
+        case UUID_FMT_SIV: rc = uuid_export_siv(uuid, data_ptr, data_len); break;
+        case UUID_FMT_TXT: rc = uuid_export_txt(uuid, data_ptr, data_len); break;
+        default:           rc = UUID_RC_ARG;
+    }
+
+    return rc;
+}
+
+/* INTERNAL: brand UUID with version and variant */
+static void uuid_brand(uuid_t *uuid, unsigned int version)
+{
+    /* set version (as given) */
+    uuid->obj.time_hi_and_version &= BM_MASK(11,0);
+    uuid->obj.time_hi_and_version |= (uuid_uint16_t)BM_SHL(version, 12);
+
+    /* set variant (always DCE 1.1 only) */
+    uuid->obj.clock_seq_hi_and_reserved &= BM_MASK(5,0);
+    uuid->obj.clock_seq_hi_and_reserved |= BM_SHL(0x02, 6);
+    return;
+}
+
+/* INTERNAL: generate UUID version 1: time, clock and node based */
+static uuid_rc_t uuid_make_v1(uuid_t *uuid, unsigned int mode, va_list ap)
+{
+    struct timeval time_now;
+    ui64_t t;
+    ui64_t offset;
+    ui64_t ov;
+    uuid_uint16_t clck;
+
+    /*
+     *  GENERATE TIME
+     */
+
+    /* determine current system time and sequence counter */
+    for (;;) {
+        /* determine current system time */
+        if (time_gettimeofday(&time_now) == -1)
+            return UUID_RC_SYS;
+
+        /* check whether system time changed since last retrieve */
+        if (!(   time_now.tv_sec  == uuid->time_last.tv_sec
+              && time_now.tv_usec == uuid->time_last.tv_usec)) {
+            /* reset time sequence counter and continue */
+            uuid->time_seq = 0;
+            break;
+        }
+
+        /* until we are out of UUIDs per tick, increment
+           the time/tick sequence counter and continue */
+        if (uuid->time_seq < UUIDS_PER_TICK) {
+            uuid->time_seq++;
+            break;
+        }
+
+        /* stall the UUID generation until the system clock (which
+           has a gettimeofday(2) resolution of 1us) catches up */
+        time_usleep(1);
+    }
+
+    /* convert from timeval (sec,usec) to OSSP ui64 (100*nsec) format */
+    t = ui64_n2i((unsigned long)time_now.tv_sec);
+    t = ui64_muln(t, 1000000, NULL);
+    t = ui64_addn(t, (int)time_now.tv_usec, NULL);
+    t = ui64_muln(t, 10, NULL);
+
+    /* adjust for offset between UUID and Unix Epoch time */
+    offset = ui64_s2i(UUID_TIMEOFFSET, NULL, 16);
+    t = ui64_add(t, offset, NULL);
+
+    /* compensate for low resolution system clock by adding
+       the time/tick sequence counter */
+    if (uuid->time_seq > 0)
+        t = ui64_addn(t, (int)uuid->time_seq, NULL);
+
+    /* store the 60 LSB of the time in the UUID */
+    t = ui64_rol(t, 16, &ov);
+    uuid->obj.time_hi_and_version =
+        (uuid_uint16_t)(ui64_i2n(ov) & 0x00000fff); /* 12 of 16 bit only! */
+    t = ui64_rol(t, 16, &ov);
+    uuid->obj.time_mid =
+        (uuid_uint16_t)(ui64_i2n(ov) & 0x0000ffff); /* all 16 bit */
+    t = ui64_rol(t, 32, &ov);
+    uuid->obj.time_low =
+        (uuid_uint32_t)(ui64_i2n(ov) & 0xffffffff); /* all 32 bit */
+
+    /*
+     *  GENERATE CLOCK
+     */
+
+    /* retrieve current clock sequence */
+    clck = ((uuid->obj.clock_seq_hi_and_reserved & BM_MASK(5,0)) << 8)
+           + uuid->obj.clock_seq_low;
+
+    /* generate new random clock sequence (initially or if the
+       time has stepped backwards) or else just increase it */
+    if (   clck == 0
+        || (   time_now.tv_sec < uuid->time_last.tv_sec
+            || (   time_now.tv_sec == uuid->time_last.tv_sec
+                && time_now.tv_usec < uuid->time_last.tv_usec))) {
+        if (prng_data(uuid->prng, (void *)&clck, sizeof(clck)) != PRNG_RC_OK)
+            return UUID_RC_INT;
+    }
+    else
+        clck++;
+    clck %= BM_POW2(14);
+
+    /* store back new clock sequence */
+    uuid->obj.clock_seq_hi_and_reserved =
+        (uuid->obj.clock_seq_hi_and_reserved & BM_MASK(7,6))
+        | (uuid_uint8_t)((clck >> 8) & 0xff);
+    uuid->obj.clock_seq_low =
+        (uuid_uint8_t)(clck & 0xff);
+
+    /*
+     *  GENERATE NODE
+     */
+
+    if ((mode & UUID_MAKE_MC) || (uuid->mac[0] & BM_OCTET(1,0,0,0,0,0,0,0))) {
+        /* generate random IEEE 802 local multicast MAC address */
+        if (prng_data(uuid->prng, (void *)&(uuid->obj.node), sizeof(uuid->obj.node)) != PRNG_RC_OK)
+            return UUID_RC_INT;
+        uuid->obj.node[0] |= IEEE_MAC_MCBIT;
+        uuid->obj.node[0] |= IEEE_MAC_LOBIT;
+    }
+    else {
+        /* use real regular MAC address */
+        memcpy(uuid->obj.node, uuid->mac, sizeof(uuid->mac));
+    }
+
+    /*
+     *  FINISH
+     */
+
+    /* remember current system time for next iteration */
+    uuid->time_last.tv_sec  = time_now.tv_sec;
+    uuid->time_last.tv_usec = time_now.tv_usec;
+
+    /* brand with version and variant */
+    uuid_brand(uuid, 1);
+
+    return UUID_RC_OK;
+}
+
+/* INTERNAL: pre-defined UUID values.
+   (defined as network byte ordered octet stream) */
+#define UUID_MAKE(a1,a2,a3,a4,a5,a6,a7,a8,a9,a10,a11,a12,a13,a14,a15,a16) \
+    { (uuid_uint8_t)(a1),  (uuid_uint8_t)(a2),  (uuid_uint8_t)(a3),  (uuid_uint8_t)(a4),  \
+      (uuid_uint8_t)(a5),  (uuid_uint8_t)(a6),  (uuid_uint8_t)(a7),  (uuid_uint8_t)(a8),  \
+      (uuid_uint8_t)(a9),  (uuid_uint8_t)(a10), (uuid_uint8_t)(a11), (uuid_uint8_t)(a12), \
+      (uuid_uint8_t)(a13), (uuid_uint8_t)(a14), (uuid_uint8_t)(a15), (uuid_uint8_t)(a16) }
+static struct {
+    char *name;
+    uuid_uint8_t uuid[UUID_LEN_BIN];
+} uuid_value_table[] = {
+    { "nil",     /* 00000000-0000-0000-0000-000000000000 ("Nil UUID") */
+      UUID_MAKE(0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00) },
+    { "ns:DNS",  /* 6ba7b810-9dad-11d1-80b4-00c04fd430c8 (see RFC 4122) */
+      UUID_MAKE(0x6b,0xa7,0xb8,0x10,0x9d,0xad,0x11,0xd1,0x80,0xb4,0x00,0xc0,0x4f,0xd4,0x30,0xc8) },
+    { "ns:URL",  /* 6ba7b811-9dad-11d1-80b4-00c04fd430c8 (see RFC 4122) */
+      UUID_MAKE(0x6b,0xa7,0xb8,0x11,0x9d,0xad,0x11,0xd1,0x80,0xb4,0x00,0xc0,0x4f,0xd4,0x30,0xc8) },
+    { "ns:OID",  /* 6ba7b812-9dad-11d1-80b4-00c04fd430c8 (see RFC 4122) */
+      UUID_MAKE(0x6b,0xa7,0xb8,0x12,0x9d,0xad,0x11,0xd1,0x80,0xb4,0x00,0xc0,0x4f,0xd4,0x30,0xc8) },
+    { "ns:X500", /* 6ba7b814-9dad-11d1-80b4-00c04fd430c8 (see RFC 4122) */
+      UUID_MAKE(0x6b,0xa7,0xb8,0x14,0x9d,0xad,0x11,0xd1,0x80,0xb4,0x00,0xc0,0x4f,0xd4,0x30,0xc8) }
+};
+
+/* load UUID object with pre-defined value */
+uuid_rc_t uuid_load(uuid_t *uuid, const char *name)
+{
+    uuid_uint8_t *uuid_octets;
+    uuid_rc_t rc;
+    unsigned int i;
+
+    /* sanity check argument(s) */
+    if (uuid == NULL || name == NULL)
+        return UUID_RC_ARG;
+
+    /* search for UUID in table */
+    uuid_octets = NULL;
+    for (i = 0; i < (unsigned int)sizeof(uuid_value_table)/sizeof(uuid_value_table[0]); i++) {
+         if (strcmp(uuid_value_table[i].name, name) == 0) {
+             uuid_octets = uuid_value_table[i].uuid;
+             break;
+         }
+    }
+    if (uuid_octets == NULL)
+        return UUID_RC_ARG;
+
+    /* import value into UUID object */
+    if ((rc = uuid_import(uuid, UUID_FMT_BIN, uuid_octets, UUID_LEN_BIN)) != UUID_RC_OK)
+        return rc;
+
+    return UUID_RC_OK;
+}
+
+/* INTERNAL: generate UUID version 3: name based with MD5 */
+static uuid_rc_t uuid_make_v3(uuid_t *uuid, unsigned int mode, va_list ap)
+{
+    char *str;
+    uuid_t *uuid_ns;
+    uuid_uint8_t uuid_buf[UUID_LEN_BIN];
+    void *uuid_ptr;
+    size_t uuid_len;
+    uuid_rc_t rc;
+
+    /* determine namespace UUID and name string arguments */
+    if ((uuid_ns = (uuid_t *)va_arg(ap, void *)) == NULL)
+        return UUID_RC_ARG;
+    if ((str = (char *)va_arg(ap, char *)) == NULL)
+        return UUID_RC_ARG;
+
+    /* initialize MD5 context */
+    if (md5_init(uuid->md5) != MD5_RC_OK)
+        return UUID_RC_MEM;
+
+    /* load the namespace UUID into MD5 context */
+    uuid_ptr = (void *)&uuid_buf;
+    uuid_len = sizeof(uuid_buf);
+    if ((rc = uuid_export(uuid_ns, UUID_FMT_BIN, &uuid_ptr, &uuid_len)) != UUID_RC_OK)
+        return rc;
+    if (md5_update(uuid->md5, uuid_buf, uuid_len) != MD5_RC_OK)
+        return UUID_RC_INT;
+
+    /* load the argument name string into MD5 context */
+    if (md5_update(uuid->md5, str, strlen(str)) != MD5_RC_OK)
+        return UUID_RC_INT;
+
+    /* store MD5 result into UUID
+       (requires MD5_LEN_BIN space, UUID_LEN_BIN space is available,
+       and both are equal in size, so we are safe!) */
+    uuid_ptr = (void *)&(uuid->obj);
+    if (md5_store(uuid->md5, &uuid_ptr, NULL) != MD5_RC_OK)
+        return UUID_RC_INT;
+
+    /* fulfill requirement of standard and convert UUID data into
+       local/host byte order (this uses fact that uuid_import_bin() is
+       able to operate in-place!) */
+    if ((rc = uuid_import(uuid, UUID_FMT_BIN, (void *)&(uuid->obj), UUID_LEN_BIN)) != UUID_RC_OK)
+        return rc;
+
+    /* brand UUID with version and variant */
+    uuid_brand(uuid, 3);
+
+    return UUID_RC_OK;
+}
+
+/* INTERNAL: generate UUID version 4: random number based */
+static uuid_rc_t uuid_make_v4(uuid_t *uuid, unsigned int mode, va_list ap)
+{
+    /* fill UUID with random data */
+    if (prng_data(uuid->prng, (void *)&(uuid->obj), sizeof(uuid->obj)) != PRNG_RC_OK)
+        return UUID_RC_INT;
+
+    /* brand UUID with version and variant */
+    uuid_brand(uuid, 4);
+
+    return UUID_RC_OK;
+}
+
+/* INTERNAL: generate UUID version 5: name based with SHA-1 */
+static uuid_rc_t uuid_make_v5(uuid_t *uuid, unsigned int mode, va_list ap)
+{
+    char *str;
+    uuid_t *uuid_ns;
+    uuid_uint8_t uuid_buf[UUID_LEN_BIN];
+    void *uuid_ptr;
+    size_t uuid_len;
+    uuid_uint8_t sha1_buf[SHA1_LEN_BIN];
+    void *sha1_ptr;
+    uuid_rc_t rc;
+
+    /* determine namespace UUID and name string arguments */
+    if ((uuid_ns = (uuid_t *)va_arg(ap, void *)) == NULL)
+        return UUID_RC_ARG;
+    if ((str = (char *)va_arg(ap, char *)) == NULL)
+        return UUID_RC_ARG;
+
+    /* initialize SHA-1 context */
+    if (sha1_init(uuid->sha1) != SHA1_RC_OK)
+        return UUID_RC_INT;
+
+    /* load the namespace UUID into SHA-1 context */
+    uuid_ptr = (void *)&uuid_buf;
+    uuid_len = sizeof(uuid_buf);
+    if ((rc = uuid_export(uuid_ns, UUID_FMT_BIN, &uuid_ptr, &uuid_len)) != UUID_RC_OK)
+        return rc;
+    if (sha1_update(uuid->sha1, uuid_buf, uuid_len) != SHA1_RC_OK)
+        return UUID_RC_INT;
+
+    /* load the argument name string into SHA-1 context */
+    if (sha1_update(uuid->sha1, str, strlen(str)) != SHA1_RC_OK)
+        return UUID_RC_INT;
+
+    /* store SHA-1 result into UUID
+       (requires SHA1_LEN_BIN space, but UUID_LEN_BIN space is available
+       only, so use a temporary buffer to store SHA-1 results and then
+       use lower part only according to standard */
+    sha1_ptr = (void *)sha1_buf;
+    if (sha1_store(uuid->sha1, &sha1_ptr, NULL) != SHA1_RC_OK)
+        return UUID_RC_INT;
+    uuid_ptr = (void *)&(uuid->obj);
+    memcpy(uuid_ptr, sha1_ptr, UUID_LEN_BIN);
+
+    /* fulfill requirement of standard and convert UUID data into
+       local/host byte order (this uses fact that uuid_import_bin() is
+       able to operate in-place!) */
+    if ((rc = uuid_import(uuid, UUID_FMT_BIN, (void *)&(uuid->obj), UUID_LEN_BIN)) != UUID_RC_OK)
+        return rc;
+
+    /* brand UUID with version and variant */
+    uuid_brand(uuid, 5);
+
+    return UUID_RC_OK;
+}
+
+/* generate UUID */
+uuid_rc_t uuid_make(uuid_t *uuid, unsigned int mode, ...)
+{
+    va_list ap;
+    uuid_rc_t rc;
+
+    /* sanity check argument(s) */
+    if (uuid == NULL)
+        return UUID_RC_ARG;
+
+    /* dispatch into version dependent generation functions */
+    va_start(ap, mode);
+    if (mode & UUID_MAKE_V1)
+        rc = uuid_make_v1(uuid, mode, ap);
+    else if (mode & UUID_MAKE_V3)
+        rc = uuid_make_v3(uuid, mode, ap);
+    else if (mode & UUID_MAKE_V4)
+        rc = uuid_make_v4(uuid, mode, ap);
+    else if (mode & UUID_MAKE_V5)
+        rc = uuid_make_v5(uuid, mode, ap);
+    else
+        rc = UUID_RC_ARG;
+    va_end(ap);
+
+    return rc;
+}
+
+/* translate UUID API error code into corresponding error string */
+char *uuid_error(uuid_rc_t rc)
+{
+    char *str;
+
+    switch (rc) {
+        case UUID_RC_OK:  str = "everything ok";    break;
+        case UUID_RC_ARG: str = "invalid argument"; break;
+        case UUID_RC_MEM: str = "out of memory";    break;
+        case UUID_RC_SYS: str = "system error";     break;
+        case UUID_RC_INT: str = "internal error";   break;
+        case UUID_RC_IMP: str = "not implemented";  break;
+        default:          str = NULL;               break;
+    }
+    return str;
+}
+
+/* OSSP uuid version (link-time information) */
+unsigned long uuid_version(void)
+{
+    return (unsigned long)(_UUID_VERSION);
+}
+