Add MinGW implementation of UUID functions

[babeltrace.git] / compat / compat_uuid.c

diff --git a/compat/compat_uuid.c b/compat/compat_uuid.c
new file mode 100644 (file)
index 0000000..6216f79
--- /dev/null
+++ b/compat/compat_uuid.c
@@ -0,0 +1,111 @@
+/*
+ * compat/compat_uuid.h
+ *
+ * Copyright (C) 2013   Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+/* This file is only built under MINGW32 */
+
+#include <windows.h>
+#include <stdlib.h>
+#include <babeltrace/compat/uuid.h>
+
+/* MinGW does not provide byteswap - implement our own version. */
+static
+void swap(unsigned char *ptr, unsigned int i, unsigned int j)
+{
+       unsigned char tmp;
+
+       tmp = ptr[i];
+       ptr[i] = ptr[j];
+       ptr[j] = tmp;
+}
+
+static
+void fix_uuid_endian(unsigned char * ptr)
+{
+       swap(ptr, 0, 3)
+       swap(ptr, 1, 2)
+       swap(ptr, 4, 5)
+       swap(ptr, 6, 7)
+}
+
+int babeltrace_uuid_generate(unsigned char *uuid_out)
+{
+       RPC_STATUS status;
+
+       status = UuidCreate((struct UUID *)uuid_out);
+       if (status == RPC_S_OK)
+               return 0;
+       else
+               return -1;
+}
+
+int babeltrace_uuid_unparse(const unsigned char *uuid_in, char *str_out)
+{
+       RPC_STATUS status;
+       unsigned char *alloc_str;
+       int ret;
+       unsigned char copy_of_uuid_in[BABELTRACE_UUID_LEN];
+
+       /* make a modifyable copy of uuid_in */
+       memcpy(copy_of_uuid_in, uuid_in, BABELTRACE_UUID_LEN);
+
+       fix_uuid_endian(copy_of_uuid_in);
+       status = UuidToString((struct UUID *) copy_of_uuid_in, &alloc_str);
+
+       if (status == RPC_S_OK) {
+               strncpy(str_out, (char *) alloc_str, BABELTRACE_UUID_STR_LEN);
+               str_out[BABELTRACE_UUID_STR_LEN - 1] = '\0';
+               ret = 0;
+       } else {
+               ret = -1;
+       }
+       RpcStringFree(&alloc_str);
+       return ret;
+}
+
+int babeltrace_uuid_parse(const char *str_in, unsigned char *uuid_out)
+{
+       RPC_STATUS status;
+
+       status = UuidFromString((unsigned char *) str_in,
+                       (struct UUID *) uuid_out);
+       fix_uuid_endian(uuid_out);
+
+       if (status == RPC_S_OK)
+               return 0;
+       else
+               return -1;
+}
+
+int babeltrace_uuid_compare(const unsigned char *uuid_a,
+               const unsigned char *uuid_b)
+{
+       RPC_STATUS status;
+
+       if (!UuidCompare((struct UUID *) uuid_a, (struct UUID *) uuid_b,
+                       &status)) {
+               return 0;
+       } else {
+               return -1;
+       }
+}