time-to-botec

commit 00684179e11c26cb02cba9e9b15faa7b1a8f4ca6
parent 131ea138ae09e609d5bf01daf3c5bceafa0a9981
Author: NunoSempere <nuno.sempere@protonmail.com>
Date:   Sat,  3 Jun 2023 03:47:10 -0600

add 0 to 1 float to xorshift implementation

Diffstat:
M
C/scratchpad/xorshift
 | 
0

M
C/scratchpad/xorshift.c
 | 
15
++++++++++++---

2 files changed, 12 insertions(+), 3 deletions(-)
diff --git a/C/scratchpad/xorshift b/C/scratchpad/xorshift
Binary files differ.
diff --git a/C/scratchpad/xorshift.c b/C/scratchpad/xorshift.c
@@ -12,15 +12,21 @@ uint32_t xorshift32(uint32_t* state)
 	return *state = x;
 }
 
+float rand_xorshift32(uint32_t* state){
+	return (float) xorshift32(state) / UINT32_MAX;
+}
+
 int main(){
 	uint32_t** states = malloc(4 * sizeof(uint32_t*));
 	for(int i=0; i<4;i++){
 		states[i] = malloc(sizeof(uint32_t));
 		*states[i] = i + 1;
 	}
-
-	printf("%i\n", xorshift32(states[0]));
-	printf("%i\n", xorshift32(states[1]));
+  
+	for(int i=0; i<100; i++){
+		printf("%u\n", xorshift32(states[0]));
+		printf("%f\n", rand_xorshift32(states[1]));
+	}
 	for(int i=0; i<4;i++){
 		free(states[i]);
 	}
@@ -28,3 +34,6 @@ int main(){
 
   return 0;
 }
+
+// See <https://stackoverflow.com/questions/53886131/how-does-xorshift32-works>
+// https://en.wikipedia.org/wiki/Xorshift