Add graph references

2026-06-28 13:49:01 +01:00
parent 0a9807e448
commit a11edf0c53
2578 changed files with 868045 additions and 0 deletions
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+/*
+ * PCG Random Number Generation for C.
+ *
+ * Copyright 2014-2019 Melissa O'Neill <oneill@pcg-random.org>,
+ *                     and the PCG Project contributors.
+ *
+ * SPDX-License-Identifier: (Apache-2.0 OR MIT)
+ *
+ * Licensed under the Apache License, Version 2.0 (provided in
+ * LICENSE-APACHE.txt and at http://www.apache.org/licenses/LICENSE-2.0)
+ * or under the MIT license (provided in LICENSE-MIT.txt and at
+ * http://opensource.org/licenses/MIT), at your option. This file may not
+ * be copied, modified, or distributed except according to those terms.
+ *
+ * Distributed on an "AS IS" BASIS, WITHOUT WARRANTY OF ANY KIND, either
+ * express or implied.  See your chosen license for details.
+ *
+ * For additional information about the PCG random number generation scheme,
+ * visit http://www.pcg-random.org/.
+ */
+
+/*
+ * This code is derived from the canonical C++ PCG implementation, which
+ * has many additional features and is preferable if you can use C++ in
+ * your project.
+ *
+ * The contents of this file were mechanically derived from pcg_variants.h
+ * (every inline function defined there gets a generated extern declaration).
+ */
+
+#include "pcg_variants.h"
+
+/* Functions to advance the underlying LCG, one version for each size and
+ * each style.  These functions are considered semi-private.  There is rarely
+ * a good reason to call them directly.
+ */
+
+#if PCG_HAS_128BIT_OPS
+extern inline void pcg_oneseq_128_step_r(struct pcg_state_128* rng);
+#endif
+
+#if PCG_HAS_128BIT_OPS
+extern inline void pcg_oneseq_128_advance_r(struct pcg_state_128* rng,
+                                            pcg128_t delta);
+#endif
+
+#if PCG_HAS_128BIT_OPS
+extern inline void pcg_mcg_128_step_r(struct pcg_state_128* rng);
+#endif
+
+#if PCG_HAS_128BIT_OPS
+extern inline void pcg_mcg_128_advance_r(struct pcg_state_128* rng,
+                                         pcg128_t delta);
+#endif
+
+#if PCG_HAS_128BIT_OPS
+extern inline void pcg_unique_128_step_r(struct pcg_state_128* rng);
+#endif
+
+#if PCG_HAS_128BIT_OPS
+extern inline void pcg_unique_128_advance_r(struct pcg_state_128* rng,
+                                            pcg128_t delta);
+#endif
+
+#if PCG_HAS_128BIT_OPS
+extern inline void pcg_setseq_128_step_r(struct pcg_state_setseq_128* rng);
+#endif
+
+#if PCG_HAS_128BIT_OPS
+extern inline void pcg_setseq_128_advance_r(struct pcg_state_setseq_128* rng,
+                                            pcg128_t delta);
+#endif
+
+/* Functions to seed the RNG state, one version for each size and each
+ * style.  Unlike the step functions, regular users can and should call
+ * these functions.
+ */
+
+#if PCG_HAS_128BIT_OPS
+extern inline void pcg_oneseq_128_srandom_r(struct pcg_state_128* rng,
+                                            pcg128_t initstate);
+#endif
+
+#if PCG_HAS_128BIT_OPS
+extern inline void pcg_mcg_128_srandom_r(struct pcg_state_128* rng,
+                                         pcg128_t initstate);
+#endif
+
+#if PCG_HAS_128BIT_OPS
+extern inline void pcg_unique_128_srandom_r(struct pcg_state_128* rng,
+                                            pcg128_t initstate);
+#endif
+
+#if PCG_HAS_128BIT_OPS
+extern inline void pcg_setseq_128_srandom_r(struct pcg_state_setseq_128* rng,
+                                            pcg128_t initstate,
+                                            pcg128_t initseq);
+#endif
+
+/* Now, finally we create each of the individual generators. We provide
+ * a random_r function that provides a random number of the appropriate
+ * type (using the full range of the type) and a boundedrand_r version
+ * that provides
+ *
+ * Implementation notes for boundedrand_r:
+ *
+ *     To avoid bias, we need to make the range of the RNG a multiple of
+ *     bound, which we do by dropping output less than a threshold.
+ *     Let's consider a 32-bit case...  A naive scheme to calculate the
+ *     threshold would be to do
+ *
+ *         uint32_t threshold = 0x100000000ull % bound;
+ *
+ *     but 64-bit div/mod is slower than 32-bit div/mod (especially on
+ *     32-bit platforms).  In essence, we do
+ *
+ *         uint32_t threshold = (0x100000000ull-bound) % bound;
+ *
+ *     because this version will calculate the same modulus, but the LHS
+ *     value is less than 2^32.
+ *
+ *     (Note that using modulo is only wise for good RNGs, poorer RNGs
+ *     such as raw LCGs do better using a technique based on division.)
+ *     Empirical tests show that division is preferable to modulus for
+ *     reducing the range of an RNG.  It's faster, and sometimes it can
+ *     even be statistically prefereable.
+ */
+
+/* Generation functions for XSH RS */
+
+#if PCG_HAS_128BIT_OPS
+extern inline uint64_t
+pcg_oneseq_128_xsh_rs_64_random_r(struct pcg_state_128* rng);
+#endif
+
+#if PCG_HAS_128BIT_OPS
+extern inline uint64_t
+pcg_oneseq_128_xsh_rs_64_boundedrand_r(struct pcg_state_128* rng,
+                                       uint64_t bound);
+#endif
+
+#if PCG_HAS_128BIT_OPS
+extern inline uint64_t
+pcg_unique_128_xsh_rs_64_random_r(struct pcg_state_128* rng);
+#endif
+
+#if PCG_HAS_128BIT_OPS
+extern inline uint64_t
+pcg_unique_128_xsh_rs_64_boundedrand_r(struct pcg_state_128* rng,
+                                       uint64_t bound);
+#endif
+
+#if PCG_HAS_128BIT_OPS
+extern inline uint64_t
+pcg_setseq_128_xsh_rs_64_random_r(struct pcg_state_setseq_128* rng);
+#endif
+
+#if PCG_HAS_128BIT_OPS
+extern inline uint64_t
+pcg_setseq_128_xsh_rs_64_boundedrand_r(struct pcg_state_setseq_128* rng,
+                                       uint64_t bound);
+#endif
+
+#if PCG_HAS_128BIT_OPS
+extern inline uint64_t
+pcg_mcg_128_xsh_rs_64_random_r(struct pcg_state_128* rng);
+#endif
+
+#if PCG_HAS_128BIT_OPS
+extern inline uint64_t
+pcg_mcg_128_xsh_rs_64_boundedrand_r(struct pcg_state_128* rng, uint64_t bound);
+#endif
+
+/* Generation functions for XSH RR */
+
+#if PCG_HAS_128BIT_OPS
+extern inline uint64_t
+pcg_oneseq_128_xsh_rr_64_random_r(struct pcg_state_128* rng);
+#endif
+
+#if PCG_HAS_128BIT_OPS
+extern inline uint64_t
+pcg_oneseq_128_xsh_rr_64_boundedrand_r(struct pcg_state_128* rng,
+                                       uint64_t bound);
+#endif
+
+#if PCG_HAS_128BIT_OPS
+extern inline uint64_t
+pcg_unique_128_xsh_rr_64_random_r(struct pcg_state_128* rng);
+#endif
+
+#if PCG_HAS_128BIT_OPS
+extern inline uint64_t
+pcg_unique_128_xsh_rr_64_boundedrand_r(struct pcg_state_128* rng,
+                                       uint64_t bound);
+#endif
+
+#if PCG_HAS_128BIT_OPS
+extern inline uint64_t
+pcg_setseq_128_xsh_rr_64_random_r(struct pcg_state_setseq_128* rng);
+#endif
+
+#if PCG_HAS_128BIT_OPS
+extern inline uint64_t
+pcg_setseq_128_xsh_rr_64_boundedrand_r(struct pcg_state_setseq_128* rng,
+                                       uint64_t bound);
+#endif
+
+#if PCG_HAS_128BIT_OPS
+extern inline uint64_t
+pcg_mcg_128_xsh_rr_64_random_r(struct pcg_state_128* rng);
+#endif
+
+#if PCG_HAS_128BIT_OPS
+extern inline uint64_t
+pcg_mcg_128_xsh_rr_64_boundedrand_r(struct pcg_state_128* rng, uint64_t bound);
+#endif
+
+/* Generation functions for RXS M XS (no MCG versions because they
+ * don't make sense when you want to use the entire state)
+ */
+
+#if PCG_HAS_128BIT_OPS
+extern inline pcg128_t
+pcg_oneseq_128_rxs_m_xs_128_random_r(struct pcg_state_128* rng);
+#endif
+
+#if PCG_HAS_128BIT_OPS
+extern inline pcg128_t
+pcg_oneseq_128_rxs_m_xs_128_boundedrand_r(struct pcg_state_128* rng,
+                                          pcg128_t bound);
+#endif
+
+#if PCG_HAS_128BIT_OPS
+extern inline pcg128_t
+pcg_unique_128_rxs_m_xs_128_random_r(struct pcg_state_128* rng);
+#endif
+
+#if PCG_HAS_128BIT_OPS
+extern inline pcg128_t
+pcg_unique_128_rxs_m_xs_128_boundedrand_r(struct pcg_state_128* rng,
+                                          pcg128_t bound);
+#endif
+
+#if PCG_HAS_128BIT_OPS
+extern inline pcg128_t
+pcg_setseq_128_rxs_m_xs_128_random_r(struct pcg_state_setseq_128* rng);
+#endif
+
+#if PCG_HAS_128BIT_OPS
+extern inline pcg128_t
+pcg_setseq_128_rxs_m_xs_128_boundedrand_r(struct pcg_state_setseq_128* rng,
+                                          pcg128_t bound);
+#endif
+
+/* Generation functions for RXS M */
+
+#if PCG_HAS_128BIT_OPS
+extern inline uint64_t
+pcg_oneseq_128_rxs_m_64_random_r(struct pcg_state_128* rng);
+#endif
+
+#if PCG_HAS_128BIT_OPS
+extern inline uint64_t
+pcg_oneseq_128_rxs_m_64_boundedrand_r(struct pcg_state_128* rng,
+                                      uint64_t bound);
+#endif
+
+#if PCG_HAS_128BIT_OPS
+extern inline uint64_t
+pcg_unique_128_rxs_m_64_random_r(struct pcg_state_128* rng);
+#endif
+
+#if PCG_HAS_128BIT_OPS
+extern inline uint64_t
+pcg_unique_128_rxs_m_64_boundedrand_r(struct pcg_state_128* rng,
+                                      uint64_t bound);
+#endif
+
+#if PCG_HAS_128BIT_OPS
+extern inline uint64_t
+pcg_setseq_128_rxs_m_64_random_r(struct pcg_state_setseq_128* rng);
+#endif
+
+#if PCG_HAS_128BIT_OPS
+extern inline uint64_t
+pcg_setseq_128_rxs_m_64_boundedrand_r(struct pcg_state_setseq_128* rng,
+                                      uint64_t bound);
+#endif
+
+#if PCG_HAS_128BIT_OPS
+extern inline uint64_t pcg_mcg_128_rxs_m_64_random_r(struct pcg_state_128* rng);
+#endif
+
+#if PCG_HAS_128BIT_OPS
+extern inline uint64_t
+pcg_mcg_128_rxs_m_64_boundedrand_r(struct pcg_state_128* rng, uint64_t bound);
+#endif
+
+/* Generation functions for XSL RR (only defined for "large" types) */
+
+#if PCG_HAS_128BIT_OPS
+extern inline uint64_t
+pcg_oneseq_128_xsl_rr_64_random_r(struct pcg_state_128* rng);
+#endif
+
+#if PCG_HAS_128BIT_OPS
+extern inline uint64_t
+pcg_oneseq_128_xsl_rr_64_boundedrand_r(struct pcg_state_128* rng,
+                                       uint64_t bound);
+#endif
+
+#if PCG_HAS_128BIT_OPS
+extern inline uint64_t
+pcg_unique_128_xsl_rr_64_random_r(struct pcg_state_128* rng);
+#endif
+
+#if PCG_HAS_128BIT_OPS
+extern inline uint64_t
+pcg_unique_128_xsl_rr_64_boundedrand_r(struct pcg_state_128* rng,
+                                       uint64_t bound);
+#endif
+
+#if PCG_HAS_128BIT_OPS
+extern inline uint64_t
+pcg_setseq_128_xsl_rr_64_random_r(struct pcg_state_setseq_128* rng);
+#endif
+
+#if PCG_HAS_128BIT_OPS
+extern inline uint64_t
+pcg_setseq_128_xsl_rr_64_boundedrand_r(struct pcg_state_setseq_128* rng,
+                                       uint64_t bound);
+#endif
+
+#if PCG_HAS_128BIT_OPS
+extern inline uint64_t
+pcg_mcg_128_xsl_rr_64_random_r(struct pcg_state_128* rng);
+#endif
+
+#if PCG_HAS_128BIT_OPS
+extern inline uint64_t
+pcg_mcg_128_xsl_rr_64_boundedrand_r(struct pcg_state_128* rng, uint64_t bound);
+#endif
+
+/* Generation functions for XSL RR RR (only defined for "large" types) */
+
+#if PCG_HAS_128BIT_OPS
+extern inline pcg128_t
+pcg_oneseq_128_xsl_rr_rr_128_random_r(struct pcg_state_128* rng);
+#endif
+
+#if PCG_HAS_128BIT_OPS
+extern inline pcg128_t
+pcg_oneseq_128_xsl_rr_rr_128_boundedrand_r(struct pcg_state_128* rng,
+                                           pcg128_t bound);
+#endif
+
+#if PCG_HAS_128BIT_OPS
+extern inline pcg128_t
+pcg_unique_128_xsl_rr_rr_128_random_r(struct pcg_state_128* rng);
+#endif
+
+#if PCG_HAS_128BIT_OPS
+extern inline pcg128_t
+pcg_unique_128_xsl_rr_rr_128_boundedrand_r(struct pcg_state_128* rng,
+                                           pcg128_t bound);
+#endif
+
+#if PCG_HAS_128BIT_OPS
+extern inline pcg128_t
+pcg_setseq_128_xsl_rr_rr_128_random_r(struct pcg_state_setseq_128* rng);
+#endif
+
+#if PCG_HAS_128BIT_OPS
+extern inline pcg128_t
+pcg_setseq_128_xsl_rr_rr_128_boundedrand_r(struct pcg_state_setseq_128* rng,
+                                           pcg128_t bound);
+#endif