Rename xorshift_basic to xorshift_256

xorshift.c

@@ -9,9 +9,10 @@ typedef struct {
   u64 y;
   u64 z;
   u64 w;
-} XORShiftBasic;
+} XORShift256;
 
-u64 xor_shift_basic_generate(XORShiftBasic *state);
+void test_xorshift_256(Pixel *data, u64 w, u64 h);
+u64 xorshift_256_generate(XORShift256 *state);
 
 int main(int argc, char *argv[]) {
   struct timespec ts = {0};
@@ -19,23 +20,31 @@ int main(int argc, char *argv[]) {
 
   srand48(ts.tv_nsec);
 
-  XORShiftBasic state = {
+  u64 w = 1024;
+  u64 h = 1024;
+  u64 length = w * h;
+  Pixel data[length];
+
+	test_xorshift_256(data, w, h);
+
+  write_p6_ppm("./outputs/xorshift_256.ppm", w, h, data);
+
+  return EXIT_SUCCESS;
+}
+
+void test_xorshift_256(Pixel *data, u64 w, u64 h) {
+  XORShift256 state = {
       .x = lrand48(),
       .y = lrand48(),
       .z = lrand48(),
       .w = lrand48(),
   };
 
-  u64 w = 1024;
-  u64 h = 1024;
-  u64 length = w * h;
-
-  Pixel data[length];
   for (u64 y = 0; y < h; ++y) {
     for (u64 x = 0; x < w; ++x) {
       u64 i = y * w + x;
 
-      u8 pixel = xor_shift_basic_generate(&state) % UINT8_MAX;
+      u8 pixel = xorshift_256_generate(&state) % UINT8_MAX;
       data[i] = (Pixel){
           .r = pixel,
           .g = pixel,
@@ -43,13 +52,9 @@ int main(int argc, char *argv[]) {
       };
     }
   }
-
-  write_p6_ppm("./outputs/xorshift.ppm", w, h, data);
-
-  return EXIT_SUCCESS;
 }
 
-u64 xor_shift_basic_generate(XORShiftBasic *state) {
+u64 xorshift_256_generate(XORShift256 *state) {
   u64 t = state->x ^ (state->x << 11);
 
   state->x = state->y;