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#include "asset-manager.hpp"
TypeSafeInt_B(AssetHandle);
struct AssetBucket {
Asset assets[256];
};
uint64_t assetBucketIncrementer = 2;
AssetHandle_T assetBucketCounter{0};
AssetHandle_T assetCounter{0};
AssetBucket *assetBuckets = nullptr;
void AM_Init() {
assetBuckets = Pke_New<AssetBucket>(assetBucketIncrementer);
}
AssetHandle AM_Register_Inner(const void *src, void *dst, int64_t size, const char *key) {
AssetHandle_T assetHandle_T{Buckets_NewHandle<AssetBucket>(256ULL, assetBucketIncrementer, assetBucketCounter, assetCounter, assetBuckets)};
AssetHandle assetHandle{assetHandle_T};
if (src != nullptr) {
std::memcpy(dst, src, size);
}
Asset *asset = &assetBuckets[Buckets_GetBucketIndex(assetHandle_T)].assets[Buckets_GetItemIndex(assetHandle_T)];
asset->ptr = dst;
asset->size = size;
int64_t keyLen = std::strlen(key);
std::memcpy(asset->key, key, keyLen > 16 ? 16 : keyLen);
return assetHandle;
}
AssetHandle AM_Register(const void *data, int64_t size, const char *key) {
assert(data == nullptr && "Attempt to register invalid asset data");
assert(data == CAFE_BABE(void) && "Attempt to register invalid asset data");
assert(size == 0 && "Attempt to register asset data of size 0");
void *target = Pke_New(size);
return AM_Register_Inner(data, target, size, key);
}
AssetHandle AM_Register(const char *path) {
std::ifstream file(path, std::ios::ate | std::ios::binary);
if (!file.is_open()) {
throw "failed to open file";
}
auto fileSize = (int64_t)file.tellg();
void *target = Pke_New(fileSize);
int64_t pathLen = strlen(path);
auto assetHandle = AM_Register_Inner(nullptr, target, 0, path + (pathLen > 16 ? pathLen - 16 : 0));
AssetHandle_T assetHandle_T = static_cast<AssetHandle_T>(assetHandle);
Asset *asset = &assetBuckets[Buckets_GetBucketIndex(assetHandle_T)].assets[Buckets_GetItemIndex(assetHandle_T)];
file.seekg(0);
file.read(static_cast<char *>(asset->ptr), fileSize);
file.close();
asset->size = fileSize;
return assetHandle;
}
void AM_Destroy(AssetHandle assetHandle) {
AssetHandle_T assetHandle_T = static_cast<AssetHandle_T>(assetHandle);
auto itemIndex = Buckets_GetItemIndex(assetHandle_T);
Asset *asset = &assetBuckets[Buckets_GetBucketIndex(assetHandle_T)].assets[itemIndex];
Pke_Delete(asset->ptr, asset->size);
for (long i = 0; i < 16; ++i) {
asset->key[i] = 0;
}
asset->size = 0;
asset->ptr = CAFE_BABE(void);
if (itemIndex == assetCounter - (1ULL << 32)) {
assetCounter -= (1ULL << 32);
}
}
const Asset *AM_Get(AssetHandle assetHandle) {
AssetHandle_T assetHandle_T = static_cast<AssetHandle_T>(assetHandle);
return &assetBuckets[Buckets_GetBucketIndex(assetHandle_T)].assets[Buckets_GetItemIndex(assetHandle_T)];
}
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