nest-open-source / nest-learning-thermostat / 5.0.2 / curl / refs/heads/master / . / curl-7.25.0 / lib / curl_rand.c

/*************************************************************************** | |

* _ _ ____ _ | |

* Project ___| | | | _ \| | | |

* / __| | | | |_) | | | |

* | (__| |_| | _ <| |___ | |

* \___|\___/|_| \_\_____| | |

* | |

* Copyright (C) 1998 - 2009, Daniel Stenberg, <daniel@haxx.se>, et al. | |

* | |

* This software is licensed as described in the file COPYING, which | |

* you should have received as part of this distribution. The terms | |

* are also available at http://curl.haxx.se/docs/copyright.html. | |

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* You may opt to use, copy, modify, merge, publish, distribute and/or sell | |

* copies of the Software, and permit persons to whom the Software is | |

* furnished to do so, under the terms of the COPYING file. | |

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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY | |

* KIND, either express or implied. | |

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***************************************************************************/ | |

#include "setup.h" | |

#include <curl/curl.h> | |

#include "curl_rand.h" | |

#define _MPRINTF_REPLACE /* use our functions only */ | |

#include <curl/mprintf.h> | |

#include "curl_memory.h" | |

/* The last #include file should be: */ | |

#include "memdebug.h" | |

/* Private pseudo-random number seed. Unsigned integer >= 32bit. Threads | |

mutual exclusion is not implemented to acess it since we do not require | |

high quality random numbers (only used in form boudary generation). */ | |

static unsigned int randseed; | |

/* Pseudo-random number support. */ | |

unsigned int Curl_rand(void) | |

{ | |

unsigned int r; | |

/* Return an unsigned 32-bit pseudo-random number. */ | |

r = randseed = randseed * 1103515245 + 12345; | |

return (r << 16) | ((r >> 16) & 0xFFFF); | |

} | |

void Curl_srand(void) | |

{ | |

/* Randomize pseudo-random number sequence. */ | |

randseed = (unsigned int) time(NULL); | |

Curl_rand(); | |

Curl_rand(); | |

Curl_rand(); | |

} | |