matrix math wrapper as well as various refactors for consistant and cleaner code

1 files changed, 81 insertions, 0 deletions

diff --git a/src/math/rodeo_rng.c b/src/math/rodeo_rng.c
new file mode 100644
index 0000000..bf94e0b
--- /dev/null
+++ b/src/math/rodeo_rng.c
@@ -0,0 +1,81 @@
+
+// internal
+// public
+#include "rodeo/math/rng.h"
+// private
+#include "math/irodeo_rng_t.h"
+
+// external
+#include "stc/crand.h"
+#include "SDL.h"
+
+// system
+#include <inttypes.h>
+
+void
+rodeo_math_rng_init(void)
+{
+	csrand(SDL_GetTicks64());
+}
+
+void
+rodeo_math_rng_deinit(void)
+{
+	// no need to do anything
+}
+
+rodeo_math_rng_generator_t
+rodeo_math_rng_generator_create(uint64_t seed)
+{
+	rodeo_math_rng_generator_t result = {
+		.seed = seed,
+		.data = malloc(sizeof(*(rodeo_math_rng_generator_t){0}.data))
+	};
+	result.data->crand = crand_init(seed);
+	return result;
+}
+
+void
+rodeo_math_rng_generator_destroy(rodeo_math_rng_generator_t generator)
+{
+	free(generator.data);
+}
+
+double
+rodeo_math_rng_double_get(rodeo_math_rng_generator_t generator)
+{
+	if(generator.seed == 0)
+	{
+		return crandf();
+	}
+	else
+	{
+		return crand_f64(&generator.data->crand);
+	}
+}
+
+float
+rodeo_math_rng_float_get(rodeo_math_rng_generator_t generator)
+{
+	return (float)rodeo_math_rng_double_get(generator);
+}
+
+uint64_t
+rodeo_math_rng_uint64_get(rodeo_math_rng_generator_t generator)
+{
+	if(generator.seed == 0)
+	{
+		return crand();
+	}
+	else
+	{
+		return crand_u64(&generator.data->crand);
+	}
+}
+
+uint32_t
+rodeo_math_rng_uint32_get(rodeo_math_rng_generator_t generator)
+{
+	return (uint32_t)rodeo_math_rng_uint64_get(generator);
+}
+