first commit

projecten1/lib/python3.6/site-packages/numpy/random/randomkit.h

@@ -0,0 +1,226 @@
+/* Random kit 1.3 */
+
+/*
+ * Copyright (c) 2003-2005, Jean-Sebastien Roy (js@jeannot.org)
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+ * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+ * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+ * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+/* @(#) $Jeannot: randomkit.h,v 1.24 2005/07/21 22:14:09 js Exp $ */
+
+/*
+ * Typical use:
+ *
+ * {
+ *  rk_state state;
+ *  unsigned long seed = 1, random_value;
+ *
+ *  rk_seed(seed, &state); // Initialize the RNG
+ *  ...
+ *  random_value = rk_random(&state); // Generate random values in [0..RK_MAX]
+ * }
+ *
+ * Instead of rk_seed, you can use rk_randomseed which will get a random seed
+ * from /dev/urandom (or the clock, if /dev/urandom is unavailable):
+ *
+ * {
+ *  rk_state state;
+ *  unsigned long random_value;
+ *
+ *  rk_randomseed(&state); // Initialize the RNG with a random seed
+ *  ...
+ *  random_value = rk_random(&state); // Generate random values in [0..RK_MAX]
+ * }
+ */
+
+/*
+ * Useful macro:
+ *  RK_DEV_RANDOM: the device used for random seeding.
+ *                 defaults to "/dev/urandom"
+ */
+
+#ifndef _RANDOMKIT_
+#define _RANDOMKIT_
+
+#include <stddef.h>
+#include <numpy/npy_common.h>
+
+
+#define RK_STATE_LEN 624
+
+typedef struct rk_state_
+{
+    unsigned long key[RK_STATE_LEN];
+    int pos;
+    int has_gauss; /* !=0: gauss contains a gaussian deviate */
+    double gauss;
+
+    /* The rk_state structure has been extended to store the following
+     * information for the binomial generator. If the input values of n or p
+     * are different than nsave and psave, then the other parameters will be
+     * recomputed. RTK 2005-09-02 */
+
+    int has_binomial; /* !=0: following parameters initialized for
+                              binomial */
+    double psave;
+    long nsave;
+    double r;
+    double q;
+    double fm;
+    long m;
+    double p1;
+    double xm;
+    double xl;
+    double xr;
+    double c;
+    double laml;
+    double lamr;
+    double p2;
+    double p3;
+    double p4;
+
+}
+rk_state;
+
+typedef enum {
+    RK_NOERR = 0, /* no error */
+    RK_ENODEV = 1, /* no RK_DEV_RANDOM device */
+    RK_ERR_MAX = 2
+} rk_error;
+
+/* error strings */
+extern char *rk_strerror[RK_ERR_MAX];
+
+/* Maximum generated random value */
+#define RK_MAX 0xFFFFFFFFUL
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/*
+ * Initialize the RNG state using the given seed.
+ */
+extern void rk_seed(unsigned long seed, rk_state *state);
+
+/*
+ * Initialize the RNG state using a random seed.
+ * Uses /dev/random or, when unavailable, the clock (see randomkit.c).
+ * Returns RK_NOERR when no errors occurs.
+ * Returns RK_ENODEV when the use of RK_DEV_RANDOM failed (for example because
+ * there is no such device). In this case, the RNG was initialized using the
+ * clock.
+ */
+extern rk_error rk_randomseed(rk_state *state);
+
+/*
+ * Returns a random unsigned long between 0 and RK_MAX inclusive
+ */
+extern unsigned long rk_random(rk_state *state);
+
+/*
+ * Returns a random long between 0 and LONG_MAX inclusive
+ */
+extern long rk_long(rk_state *state);
+
+/*
+ * Returns a random unsigned long between 0 and ULONG_MAX inclusive
+ */
+extern unsigned long rk_ulong(rk_state *state);
+
+/*
+ * Returns a random unsigned long between 0 and max inclusive.
+ */
+extern unsigned long rk_interval(unsigned long max, rk_state *state);
+
+/*
+ * Fills an array with cnt random npy_uint64 between off and off + rng
+ * inclusive. The numbers wrap if rng is sufficiently large.
+ */
+extern void rk_random_uint64(npy_uint64 off, npy_uint64 rng, npy_intp cnt,
+                             npy_uint64 *out, rk_state *state);
+
+/*
+ * Fills an array with cnt random npy_uint32 between off and off + rng
+ * inclusive. The numbers wrap if rng is sufficiently large.
+ */
+extern void rk_random_uint32(npy_uint32 off, npy_uint32 rng, npy_intp cnt,
+                             npy_uint32 *out, rk_state *state);
+
+/*
+ * Fills an array with cnt random npy_uint16 between off and off + rng
+ * inclusive. The numbers wrap if rng is sufficiently large.
+ */
+extern void rk_random_uint16(npy_uint16 off, npy_uint16 rng, npy_intp cnt,
+                             npy_uint16 *out, rk_state *state);
+
+/*
+ * Fills an array with cnt random npy_uint8 between off and off + rng
+ * inclusive. The numbers wrap if rng is sufficiently large.
+ */
+extern void rk_random_uint8(npy_uint8 off, npy_uint8 rng, npy_intp cnt,
+                            npy_uint8 *out, rk_state *state);
+
+/*
+ * Fills an array with cnt random npy_bool between off and off + rng
+ * inclusive. It is assumed tha npy_bool as the same size as npy_uint8.
+ */
+extern void rk_random_bool(npy_bool off, npy_bool rng, npy_intp cnt,
+                           npy_bool *out, rk_state *state);
+
+/*
+ * Returns a random double between 0.0 and 1.0, 1.0 excluded.
+ */
+extern double rk_double(rk_state *state);
+
+/*
+ * fill the buffer with size random bytes
+ */
+extern void rk_fill(void *buffer, size_t size, rk_state *state);
+
+/*
+ * fill the buffer with randombytes from the random device
+ * Returns RK_ENODEV if the device is unavailable, or RK_NOERR if it is
+ * On Unix, if strong is defined, RK_DEV_RANDOM is used. If not, RK_DEV_URANDOM
+ * is used instead. This parameter has no effect on Windows.
+ * Warning: on most unixes RK_DEV_RANDOM will wait for enough entropy to answer
+ * which can take a very long time on quiet systems.
+ */
+extern rk_error rk_devfill(void *buffer, size_t size, int strong);
+
+/*
+ * fill the buffer using rk_devfill if the random device is available and using
+ * rk_fill if is is not
+ * parameters have the same meaning as rk_fill and rk_devfill
+ * Returns RK_ENODEV if the device is unavailable, or RK_NOERR if it is
+ */
+extern rk_error rk_altfill(void *buffer, size_t size, int strong,
+                            rk_state *state);
+
+/*
+ * return a random gaussian deviate with variance unity and zero mean.
+ */
+extern double rk_gauss(rk_state *state);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _RANDOMKIT_ */