Fix TCP4/TCP6 connections. Connections were transitioning into the connected state...

[mirror_edk2.git] / StdLib / LibC / StdLib / Rand.c

/*-\r
 * Portions Copyright (c) 2010, Intel Corporation. All rights reserved.<BR>\r
 * Copyright (c) 1990, 1993\r
 *  The Regents of the University of California.  All rights reserved.\r
 *\r
 * Redistribution and use in source and binary forms, with or without\r
 * modification, are permitted provided that the following conditions\r
 * are met:\r
 * 1. Redistributions of source code must retain the above copyright\r
 *    notice, this list of conditions and the following disclaimer.\r
 * 2. Redistributions in binary form must reproduce the above copyright\r
 *    notice, this list of conditions and the following disclaimer in the\r
 *    documentation and/or other materials provided with the distribution.\r
 * 4. Neither the name of the University nor the names of its contributors\r
 *    may be used to endorse or promote products derived from this software\r
 *    without specific prior written permission.\r
 *\r
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND\r
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE\r
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE\r
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE\r
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL\r
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS\r
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)\r
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT\r
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY\r
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF\r
 * SUCH DAMAGE.\r
 *\r
 */\r
//__FBSDID("$FreeBSD: src/lib/libc/stdlib/rand.c,v 1.17.2.1.2.1 2009/10/25 01:10:29 kensmith Exp $");\r
#include  <LibConfig.h>\r
\r
#include  <stdlib.h>\r
\r
static UINT32 next = 1;\r
\r
/** Compute a pseudo-random number.\r
  *\r
  * Compute x = (7^5 * x) mod (2^31 - 1)\r
  * without overflowing 31 bits:\r
  *      (2^31 - 1) = 127773 * (7^5) + 2836\r
  * From "Random number generators: good ones are hard to find",\r
  * Park and Miller, Communications of the ACM, vol. 31, no. 10,\r
  * October 1988, p. 1195.\r
**/\r
int\r
rand()\r
{\r
  INT32 hi, lo, x;\r
\r
  /* Can't be initialized with 0, so use another value. */\r
  if (next == 0)\r
    next = 123459876;\r
  hi = next / 127773;\r
  lo = next % 127773;\r
  x = 16807 * lo - 2836 * hi;\r
  if (x < 0)\r
    x += 0x7fffffff;\r
  return ((next = x) % ((UINT32)RAND_MAX + 1));\r
}\r
\r
void\r
srand(unsigned int seed)\r
{\r
  next = (UINT32)seed;\r
}\r