nbt.h

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

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

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

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

CLOD_API CLOD_PURE CLOD_NONNULL(1, 2)
clod_sstr clod_nbt_tag_name(const char *tag, const void *end);

struct clod_nbt_iter {
    char *tag;
    char *payload;
    size_t size;
    char 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 char *restrict payload,
    const void *end,
    char payload_type,
    struct clod_nbt_iter *iter
);

CLOD_API CLOD_NONNULL(1, 2)
char *clod_nbt_compound_get(
    const char *restrict compound,
    const void *end,
    clod_sstr name
);

CLOD_API CLOD_NONNULL(2, 3)
char *clod_nbt_compound_add(
    char *restrict compound,
    const void **end,
    ptrdiff_t *free,
    clod_sstr name,
    char type
);

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

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

#endif