libsxmp/lib/uuid.c

/*
 * Secure X Message Passing Library v2 implementation.
 * (c) Askele Group 2013-2015 <http://askele.com>
 * (c) Alexander Vdolainen 2013-2015 <avdolainen@gmail.com>
 *
 * libsxmp is free software: you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as published
 * by the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * libsxmp is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 * See the GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.";
 *
 */

#include <stdlib.h>
#include <stdio.h>
#include <errno.h>
#include <string.h>
#include <pthread.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <sys/types.h>

#ifdef WIN32
#include <Winsock2.h>
#include <windows.h>
#include <rpc.h>
#else
#include <sys/select.h>
#include <netdb.h>
#include <unistd.h>
#include <uuid/uuid.h>
#endif

#include <fcntl.h>

#ifdef WIN32
#define UUID_T_LENGTH 16

#ifdef uuid_t
#undef uuid_t
#endif

typedef unsigned char uuid_t[16];

void uuid_generate_random(uuid_t out){
  int i,a=0;
  LARGE_INTEGER frequency,t1;
  long int d;

  for(i=0;i<UUID_T_LENGTH;i++){
     a=rand();
    *(out+i)=a;
  }

   QueryPerformanceFrequency(&frequency);

   QueryPerformanceCounter(&t1);
   d=(long int)t1.QuadPart*1000/frequency.QuadPart;
   memcpy(out,&d,sizeof(d));
}

#endif
/* this function is an ugly implementation to get C string with uuid */
char *__generate_uuid(void)
{
#ifdef WIN32
  char *uuidc = NULL;
  uuid_t uuid_t_m;
  int len, i = 0,r=0;

  len = 33;
  if(!(uuidc = malloc(len))) return NULL;

  uuid_generate_random(uuid_t_m);

  for(i = 0; i < 16; i++)
      snprintf(uuidc+(2*i*sizeof(char)), len, "%02x", uuid_t_m[i]);

  return uuidc;

#else
  char *uuidc = NULL;
  uuid_t uuid;
  int len, i = 0;

  len = sizeof(char)*(sizeof(uuid_t)*2) + sizeof(char);
  if(!(uuidc = malloc(len))) return NULL;

  uuid_generate_time_safe(uuid);

  for(i = 0; i < sizeof(uuid_t); i++)
      snprintf(uuidc+(2*i*sizeof(char)), len, "%02x", uuid[i]);

  return uuidc;
#endif
}