From d4651589b3b392a11a256452813ee7d7396cdf85 Mon Sep 17 00:00:00 2001
From: Mitya Selivanov <0x7fffff@guattari.ru>
Date: Tue, 30 Aug 2022 09:14:07 +0400
Subject: [mt64] kit_mt64_init_array

---
 source/kit/mersenne_twister_64.c | 16 ++++++++++++----
 source/kit/mersenne_twister_64.h |  4 ++++
 2 files changed, 16 insertions(+), 4 deletions(-)

(limited to 'source')

diff --git a/source/kit/mersenne_twister_64.c b/source/kit/mersenne_twister_64.c
index 9ab39d3..c8bbbe2 100644
--- a/source/kit/mersenne_twister_64.c
+++ b/source/kit/mersenne_twister_64.c
@@ -2,9 +2,12 @@
 
 #include "time.h"
 
-void kit_mt64_init(kit_mt64_state_t *state, uint64_t seed) {
-  state->mt[0] = seed;
-  for (state->index = 1; state->index < KIT_MT64_N; state->index++)
+void kit_mt64_init_array(kit_mt64_state_t *const state,
+                         ptrdiff_t const         size,
+                         uint64_t const *const   seed) {
+  for (ptrdiff_t i = 0; i < size && i < KIT_MT64_N; i++)
+    state->mt[i] = seed[i];
+  for (state->index = size; state->index < KIT_MT64_N; state->index++)
     state->mt[state->index] = (6364136223846793005ull *
                                    (state->mt[state->index - 1] ^
                                     (state->mt[state->index - 1] >>
@@ -12,7 +15,12 @@ void kit_mt64_init(kit_mt64_state_t *state, uint64_t seed) {
                                state->index);
 }
 
-uint64_t kit_mt64_generate(kit_mt64_state_t *state) {
+void kit_mt64_init(kit_mt64_state_t *const state,
+                   uint64_t const          seed) {
+  kit_mt64_init_array(state, 1, &seed);
+}
+
+uint64_t kit_mt64_generate(kit_mt64_state_t *const state) {
   static uint64_t const mag01[2] = { 0ull, 0xB5026F5AA96619E9ull };
 
   int      i;
diff --git a/source/kit/mersenne_twister_64.h b/source/kit/mersenne_twister_64.h
index 416ef27..fb509c2 100644
--- a/source/kit/mersenne_twister_64.h
+++ b/source/kit/mersenne_twister_64.h
@@ -17,6 +17,9 @@ typedef struct {
   uint64_t index;
 } kit_mt64_state_t;
 
+void kit_mt64_init_array(kit_mt64_state_t *state, ptrdiff_t size,
+                         uint64_t const *seed);
+
 void kit_mt64_init(kit_mt64_state_t *state, uint64_t seed);
 
 uint64_t kit_mt64_generate(kit_mt64_state_t *state);
@@ -25,6 +28,7 @@ uint64_t kit_mt64_seed();
 
 #ifndef KIT_DISABLE_SHORT_NAMES
 #  define mt64_state_t kit_mt64_state_t
+#  define mt64_init_array kit_mt64_init_array
 #  define mt64_init kit_mt64_init
 #  define mt64_generate kit_mt64_generate
 #  define mt64_seed kit_mt64_seed
-- 
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