From 5be3c38211c6e236fdf39c2885da571d93ad32ae Mon Sep 17 00:00:00 2001
From: Andrew Guschin <saintruler@gmail.com>
Date: Wed, 15 Sep 2021 00:20:47 +0400
Subject: Added systems support

---
 src/storage.c | 33 +++++++++++++++++++++++++++++++++
 1 file changed, 33 insertions(+)

(limited to 'src/storage.c')

diff --git a/src/storage.c b/src/storage.c
index 3b715ee..1935ae7 100644
--- a/src/storage.c
+++ b/src/storage.c
@@ -1,4 +1,5 @@
 #include "storage.h"
+#include "bitset.h"
 
 component_pair_t *
 findPair(storage_t *this, const char *name)
@@ -26,12 +27,42 @@ createEntity(storage_t *this)
 	return idx;
 }
 
+void
+registerSystem(storage_t *storage, system_t system, bitset_t components)
+{
+	int idx = storage->systemsStored++;
+	storage->systems[idx] = system;
+	bitarena_copy(&storage->systemSignatures, components, idx);
+}
+
+bitset_t
+createSignature(storage_t *storage, char **components)
+{
+	bitset_t bitset = bitset_create();
+
+	for (int i = 0; components[i] != NULL; ++i)
+	{
+		const char *componentName = components[i];
+		component_pair_t *pair = findPair(storage, componentName);
+		if (pair == NULL)
+		{
+			return NULL;
+		}
+		else
+		{
+			bitset_set(bitset, pair->idx);
+		}
+	}
+	return bitset;
+}
+
 // Not intended for use outside of macros
 void
 internal_registerComponent(storage_t *storage, const char *name, size_t size)
 {
 	unsigned int componentIdx = storage->componentsStored++;
 	storage->objects[componentIdx] = (component_pair_t) {
+		.idx = componentIdx,
 		.name = name,
 		.objectSize = size,
 		.objects = malloc(sizeof(char) * size * MAX_OBJECTS)
@@ -48,6 +79,8 @@ internal_addComponent(storage_t *this, entity_t idx, const char *name)
 	}
 
 	// TODO: add bitset implementation
+	bitset_t bitset = bitarena_at(&this->objectSignatures, idx);
+	bitset_set(bitset, pair->idx);
 
 	return &pair->objects[idx];
 }
-- 
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