guid.cpp

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/* SPDX-License-Identifier: MIT */
#include "guid.h"
 
std::string CreateGuid (void)
{
    #if defined (AJA_WINDOWS)
        UUID    uuid;
        UuidCreate (&uuid);
 
        unsigned char * str (NULL);
        UuidToStringA (&uuid, &str);
 
        std::string result (reinterpret_cast <char *> (str));
        RpcStringFreeA (&str);
    #elif defined (AJA_LINUX)
        #include <stdio.h>
        #define GUID_LENGTH 36
 
        std::string result ("");
 
        FILE *fp = fopen ("/proc/sys/kernel/random/uuid", "r");
        if (fp)
        {
            char guid[GUID_LENGTH + 1];
 
            size_t readSize = fread (guid, 1, GUID_LENGTH, fp);
            if (readSize == GUID_LENGTH)
            {
                guid [GUID_LENGTH] = '\0';
                result = std::string((const char *) guid);
            }
            fclose (fp);
        }
    #else
        uuid_t  uuid;
        uuid_generate_random (uuid);
        char    result [37];
        uuid_unparse (uuid, result);
    #endif
    return result;
}