forked from Telodendria/Telodendria
Format source code.
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9 changed files with 41 additions and 37 deletions
21
src/Rand.c
21
src/Rand.c
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@ -29,24 +29,25 @@
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#include <pthread.h>
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#include <unistd.h>
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/* Generate random numbers using rejection sampling.
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* The basic idea is to "reroll" if a number happens to be
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* outside the range. However this could be extremely inefficient.
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/* Generate random numbers using rejection sampling. The basic idea is
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* to "reroll" if a number happens to be outside the range. However
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* this could be extremely inefficient.
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*
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* Another idea would just be to "reroll" if the generated number
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* ends up in the previously "biased" range, and THEN do a modulo.
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* Another idea would just be to "reroll" if the generated number ends up
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* in the previously "biased" range, and THEN do a modulo.
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*
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* This would be far more efficient for small values of max,
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* and fixes the bias issue. */
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* This would be far more efficient for small values of max, and fixes the
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* bias issue. */
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/* This algorithm therefore computes N random numbers generally in
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* O(N) time, while being less biased. */
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/* This algorithm therefore computes N random numbers generally in O(N)
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* time, while being less biased. */
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void
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RandIntN(int *buf, size_t size, unsigned int max)
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{
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static pthread_mutex_t seedLock = PTHREAD_MUTEX_INITIALIZER;
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static unsigned int seed = 0;
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int tmp;
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/* Limit the range to banish all previously biased results */
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const int allowed = RAND_MAX - RAND_MAX % max;
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@ -73,11 +74,13 @@ RandIntN(int * buf, size_t size, unsigned int max)
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}
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pthread_mutex_unlock(&seedLock);
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}
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/* Generate just 1 random number */
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int
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RandInt(unsigned int max)
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{
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int val = 0;
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RandIntN(&val, 1, max);
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return val;
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}
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@ -147,7 +147,8 @@ ROUTE_IMPL(RouteRefresh, args)
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/* Update the refresh token to point to the new access token */
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JsonValueFree(HashMapSet(DbJson(rtRef), "refreshes", JsonValueString(StrDuplicate(newAccessToken->string))));
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/* Return the new access token and expiration timestamp to the client */
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/* Return the new access token and expiration timestamp to the
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* client */
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response = HashMapCreate();
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HashMapSet(response, "access_token", JsonValueString(StrDuplicate(newAccessToken->string)));
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HashMapSet(response, "expires_in_ms", JsonValueInteger(newAccessToken->lifetime));
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