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 /* This file is only built under MINGW32 */
  26
  27 #include <windows.h>
  28 #include <stdlib.h>
  29 #include <babeltrace/compat/uuid.h>
  30
  31 /* MinGW does not provide byteswap - implement our own version. */
  32 static
  33 void swap(unsigned char *ptr, unsigned int i, unsigned int j)
  34 {
  35         unsigned char tmp;
  36
  37         tmp = ptr[i];
  38         ptr[i] = ptr[j];
  39         ptr[j] = tmp;
  40 }
  41
  42 static
  43 void fix_uuid_endian(unsigned char * ptr)
  44 {
  45         swap(ptr, 0, 3)
  46         swap(ptr, 1, 2)
  47         swap(ptr, 4, 5)
  48         swap(ptr, 6, 7)
  49 }
  50
  51 int babeltrace_uuid_generate(unsigned char *uuid_out)
  52 {
  53         RPC_STATUS status;
  54
  55         status = UuidCreate((struct UUID *)uuid_out);
  56         if (status == RPC_S_OK)
  57                 return 0;
  58         else
  59                 return -1;
  60 }
  61
  62 int babeltrace_uuid_unparse(const unsigned char *uuid_in, char *str_out)
  63 {
  64         RPC_STATUS status;
  65         unsigned char *alloc_str;
  66         int ret;
  67         unsigned char copy_of_uuid_in[BABELTRACE_UUID_LEN];
  68
  69         /* make a modifyable copy of uuid_in */
  70         memcpy(copy_of_uuid_in, uuid_in, BABELTRACE_UUID_LEN);
  71
  72         fix_uuid_endian(copy_of_uuid_in);
  73         status = UuidToString((struct UUID *) copy_of_uuid_in, &alloc_str);
  74
  75         if (status == RPC_S_OK) {
  76                 strncpy(str_out, (char *) alloc_str, BABELTRACE_UUID_STR_LEN);
  77                 str_out[BABELTRACE_UUID_STR_LEN - 1] = '\0';
  78                 ret = 0;
  79         } else {
  80                 ret = -1;
  81         }
  82         RpcStringFree(&alloc_str);
  83         return ret;
  84 }
  85
  86 int babeltrace_uuid_parse(const char *str_in, unsigned char *uuid_out)
  87 {
  88         RPC_STATUS status;
  89
  90         status = UuidFromString((unsigned char *) str_in,
  91                         (struct UUID *) uuid_out);
  92         fix_uuid_endian(uuid_out);
  93
  94         if (status == RPC_S_OK)
  95                 return 0;
  96         else
  97                 return -1;
  98 }
  99
 100 int babeltrace_uuid_compare(const unsigned char *uuid_a,
 101                 const unsigned char *uuid_b)
 102 {
 103         RPC_STATUS status;
 104
 105         if (!UuidCompare((struct UUID *) uuid_a, (struct UUID *) uuid_b,
 106                         &status)) {
 107                 return 0;
 108         } else {
 109                 return -1;
 110         }
 111 }