nbt.h

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#ifndef LIBCLOD_NBT_H
#define LIBCLOD_NBT_H
 
#include <clod/lib.h>
#include <clod/string.h>
#include <stdint.h>
#include <stddef.h>
 
#define CLOD_NBT_ZERO        (uint8_t)(0)
#define CLOD_NBT_INT8        (uint8_t)(1)
#define CLOD_NBT_INT16       (uint8_t)(2)
#define CLOD_NBT_INT32       (uint8_t)(3)
#define CLOD_NBT_INT64       (uint8_t)(4)
#define CLOD_NBT_FLOAT32     (uint8_t)(5)
#define CLOD_NBT_FLOAT64     (uint8_t)(6)
#define CLOD_NBT_INT8_ARRAY  (uint8_t)(7)
#define CLOD_NBT_INT32_ARRAY (uint8_t)(11)
#define CLOD_NBT_INT64_ARRAY (uint8_t)(12)
#define CLOD_NBT_STRING      (uint8_t)(8)
#define CLOD_NBT_LIST        (uint8_t)(9)
#define CLOD_NBT_COMPOUND    (uint8_t)(10)
 
#define CLOD_NBT_ROOT_COMPOUND_INIT   ((uint8_t[]){CLOD_NBT_COMPOUND, 0, 0, 0})
#define CLOD_NBT_ROOT_LIST_INIT(type) ((uint8_t[]){CLOD_NBT_LIST, type, 0, 0, 0, 0})

CLOD_API CLOD_PURE CLOD_NONNULL(1, 2)
size_t clod_nbt_payload_size(
    const uint8_t *restrict payload,
    const void *end,
    uint8_t payload_type
);

CLOD_API CLOD_PURE CLOD_NONNULL(1)
size_t clod_nbt_tag_size(const uint8_t *restrict tag, const void *end);

CLOD_API CLOD_PURE CLOD_NONNULL(1, 2)
uint8_t *clod_nbt_tag_payload(const uint8_t *restrict tag, const void *end);

CLOD_API CLOD_PURE CLOD_NONNULL(1, 2)
struct clod_string clod_nbt_tag_name(const uint8_t *tag, const void *end);

struct clod_nbt_iter {
    uint8_t *tag;
    uint8_t *payload;
    size_t size;
    uint8_t type;
    uint32_t index;
};
#define CLOD_NBT_ITER_ZERO { .type = CLOD_NBT_ZERO }

CLOD_API CLOD_USE_RETURN CLOD_NONNULL(1, 2, 4)
bool clod_nbt_iter_next(
    const uint8_t *restrict payload,
    const void *end,
    uint8_t payload_type,
    struct clod_nbt_iter *iter
);

CLOD_API CLOD_NONNULL(1, 2)
uint8_t *clod_nbt_compound_get(
    const uint8_t *restrict compound,
    const void *end,
    struct clod_string name
);

CLOD_API CLOD_NONNULL(2, 3)
uint8_t *clod_nbt_compound_add(
    uint8_t *restrict compound,
    const void **end,
    ptrdiff_t *free,
    struct clod_string name,
    uint8_t type
);

CLOD_API CLOD_NONNULL(1, 2, 3)
bool clod_nbt_compound_del(
    uint8_t *restrict compound,
    const void **end,
    ptrdiff_t *free,
    struct clod_string name
);

CLOD_API CLOD_NONNULL(2)
bool clod_nbt_list_resize(
    uint8_t *restrict list,
    const uint8_t **end,
    ptrdiff_t *free,
    uint8_t type,
    uint32_t length
);

#endif