Merge branch 'upstream' into debian-cmake-fixes

1 files changed, 105 insertions, 0 deletions

diff --git a/src/z-rand.hpp b/src/z-rand.hpp
new file mode 100644
index 00000000..b04523c3
--- /dev/null
+++ b/src/z-rand.hpp
@@ -0,0 +1,105 @@
+#pragma once
+
+#include "h-basic.h"
+#include "seed_fwd.hpp"
+
+#include <string>
+
+/**** Available constants ****/
+
+
+/*
+ * Random Number Generator -- Degree of "complex" RNG -- see "misc.c"
+ * This value is hard-coded at 63 for a wide variety of reasons.
+ */
+#define RAND_DEG 63
+
+
+
+
+/**** Available Variables ****/
+
+
+/**
+ * Change to "quick" RNG, using the given seed.
+ */
+void set_quick_rng(seed_t const &seed);
+
+
+/**
+ * Change to "complex" RNG which uses the "non-deterministic" seed.
+ */
+void set_complex_rng();
+
+
+/**
+ * Get a copy of the state of the "complex" RNG.
+ */
+std::string get_complex_rng_state();
+
+
+/**
+ * Set the state of the "complex" RNG. The given array must have
+ * been previously obtained via the get_complex_rng_state() function.
+ */
+void set_complex_rng_state(std::string const &state);
+
+/**** Available Functions ****/
+
+
+void Rand_state_init();
+s16b randnor(int mean, int stand);
+s32b damroll(s16b num, s16b sides);
+s32b maxroll(s16b num, s16b sides);
+
+/**
+ * Evaluate to "true" p percent of the time.
+ */
+bool magik(s32b p);
+
+/*
+ * Generates a random long integer X where 0<=X<M.
+ * The integer X falls along a uniform distribution.
+ * For example, if M is 100, you get "percentile dice"
+ */
+s32b rand_int(s32b m);
+
+/*
+ * Generate a random long integer X where 1<=X<=M
+ * Also, "correctly" handle the case of M<=1
+ */
+s32b randint(s32b m);
+
+/*
+ * Generates a random long integer X where A<=X<=B
+ * The integer X falls along a uniform distribution.
+ * Note: rand_range(0,N-1) == rand_int(N)
+ */
+s32b rand_range(s32b a, s32b b);
+
+/*
+ * Generate a random long integer X where A-D<=X<=A+D
+ * The integer X falls along a uniform distribution.
+ * Note: rand_spread(A,D) == rand_range(A-D,A+D)
+ */
+s32b rand_spread(s32b a, s32b d);
+
+/**
+ * Choose a random element in from the given container.
+ * The container, C, must fulfill the Container concept
+ * whose iterators fulfill the RandomIterator concept.
+ **/
+template <class C> typename C::const_iterator uniform_element(C const &c)
+{
+	return c.cbegin() + rand_int(c.size());
+}
+
+/**
+ * Choose a random element in from the given container.
+ * The container, C, must fulfill the Container concept
+ * whose iterators fulfill the RandomIterator concept.
+ **/
+template <class C> typename C::iterator uniform_element(C &c)
+{
+	return c.begin() + rand_int(c.size());
+}