compat/compat_uuid.c

   1 /*
   2  * compat/compat_uuid.h
   3  *
   4  * Copyright (C) 2013   Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a copy
   7  * of this software and associated documentation files (the "Software"), to deal
   8  * in the Software without restriction, including without limitation the rights
   9  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  10  * copies of the Software, and to permit persons to whom the Software is
  11  * furnished to do so, subject to the following conditions:
  12  *
  13  * The above copyright notice and this permission notice shall be included in
  14  * all copies or substantial portions of the Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  19  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  21  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  22  * SOFTWARE.
  23  */
  24
  25 #define BT_LOG_TAG "COMPAT-UUID"
  26 #include "logging.h"
  27
  28 #ifdef __MINGW32__
  29
  30 #include <rpc.h>
  31 #include <stdlib.h>
  32 #include <babeltrace/compat/uuid-internal.h>
  33
  34 /* MinGW does not provide byteswap - implement our own version. */
  35 static
  36 void swap(unsigned char *ptr, unsigned int i, unsigned int j)
  37 {
  38         unsigned char tmp;
  39
  40         tmp = ptr[i];
  41         ptr[i] = ptr[j];
  42         ptr[j] = tmp;
  43 }
  44
  45 static
  46 void fix_uuid_endian(unsigned char * ptr)
  47 {
  48         swap(ptr, 0, 3);
  49         swap(ptr, 1, 2);
  50         swap(ptr, 4, 5);
  51         swap(ptr, 6, 7);
  52 }
  53
  54 int bt_uuid_generate(unsigned char *uuid_out)
  55 {
  56         RPC_STATUS status;
  57
  58         status = UuidCreate((UUID *) uuid_out);
  59         if (status == RPC_S_OK)
  60                 return 0;
  61         else
  62                 return -1;
  63 }
  64
  65 int bt_uuid_unparse(const unsigned char *uuid_in, char *str_out)
  66 {
  67         RPC_STATUS status;
  68         unsigned char *alloc_str;
  69         int ret;
  70         unsigned char copy_of_uuid_in[BABELTRACE_UUID_LEN];
  71
  72         /* make a modifyable copy of uuid_in */
  73         memcpy(copy_of_uuid_in, uuid_in, BABELTRACE_UUID_LEN);
  74
  75         fix_uuid_endian(copy_of_uuid_in);
  76         status = UuidToString((UUID *) copy_of_uuid_in, &alloc_str);
  77
  78         if (status == RPC_S_OK) {
  79                 strncpy(str_out, (char *) alloc_str, BABELTRACE_UUID_STR_LEN);
  80                 str_out[BABELTRACE_UUID_STR_LEN - 1] = '\0';
  81                 ret = 0;
  82         } else {
  83                 ret = -1;
  84         }
  85         RpcStringFree(&alloc_str);
  86         return ret;
  87 }
  88
  89 int bt_uuid_parse(const char *str_in, unsigned char *uuid_out)
  90 {
  91         RPC_STATUS status;
  92
  93         status = UuidFromString((unsigned char *) str_in,
  94                         (UUID *) uuid_out);
  95         fix_uuid_endian(uuid_out);
  96
  97         if (status == RPC_S_OK)
  98                 return 0;
  99         else
 100                 return -1;
 101 }
 102
 103 int bt_uuid_compare(const unsigned char *uuid_a,
 104                 const unsigned char *uuid_b)
 105 {
 106         RPC_STATUS status;
 107
 108         return !UuidCompare((UUID *) uuid_a, (UUID *) uuid_b, &status) ? 0 : -1;
 109 }
 110
 111 #endif