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123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166#ifndef BUFFER_H#define BUFFER_H
#include <stdatomic.h>#include <stdint.h>#include <stddef.h>#include "types.h"#include "native_tag.h"
typedef enum { ARRAY_BUFFER_STORAGE_EXTERNAL, ARRAY_BUFFER_STORAGE_INLINE, ARRAY_BUFFER_STORAGE_BORROWED,} array_buffer_storage_t;
typedef struct ArrayBufferData { uint8_t *data; size_t length; size_t capacity; struct ArrayBufferData *owner; _Atomic int ref_count; uint32_t registry_slot; uint8_t is_shared; uint8_t is_detached; uint8_t storage; uint8_t untransferable; uint8_t resizable; uint8_t views_slow;} ArrayBufferData;
#if UINTPTR_MAX == UINT64_MAXstatic_assert(sizeof(ArrayBufferData) == 48, "ArrayBufferData layout changed");#elif UINTPTR_MAX == UINT32_MAXstatic_assert(sizeof(ArrayBufferData) == 28, "ArrayBufferData layout changed");#endif
typedef enum { TYPED_ARRAY_INT8, TYPED_ARRAY_UINT8, TYPED_ARRAY_UINT8_CLAMPED, TYPED_ARRAY_INT16, TYPED_ARRAY_UINT16, TYPED_ARRAY_INT32, TYPED_ARRAY_UINT32, TYPED_ARRAY_FLOAT16, TYPED_ARRAY_FLOAT32, TYPED_ARRAY_FLOAT64, TYPED_ARRAY_BIGINT64, TYPED_ARRAY_BIGUINT64, TYPED_ARRAY_COUNT} TypedArrayType;
typedef struct { ArrayBufferData *buffer; TypedArrayType type; bool length_tracking; size_t byte_offset; size_t byte_length; size_t length; ArrayBufferData *backing; size_t base_length;} TypedArrayData;
typedef struct { ArrayBufferData *buffer; size_t byte_offset; size_t byte_length; ArrayBufferData *backing; size_t base_length; bool length_tracking;} DataViewData;
typedef enum { BUFFER_TA_ACCESS_NONE, BUFFER_TA_ACCESS_SLOW, BUFFER_TA_ACCESS_INLINE,} buffer_ta_access_t;
static constexpr size_t BUFFER_INSPECT_MAX_BYTES = 50;
static constexpr uint32_t BUFFER_ARRAYBUFFER_NATIVE_TAG = Ant_NativeTag("ABUF");static constexpr uint32_t BUFFER_TYPEDARRAY_NATIVE_TAG = Ant_NativeTag("TYAR");static constexpr uint32_t BUFFER_DATAVIEW_NATIVE_TAG = Ant_NativeTag("DVIW");
ant_value_t buffer_library(ant_t *js);size_t buffer_get_external_memory(ant_t *js);
buffer_ta_access_t buffer_typedarray_inline_get(ant_value_t obj, ant_value_t key, TypedArrayType *type);buffer_ta_access_t buffer_typedarray_inline_put(ant_value_t obj, ant_value_t key, ant_value_t value, TypedArrayType *type);
void init_buffer_module(ant_t *js);void cleanup_buffer_module(ant_t *js);void free_array_buffer_data(ant_t *js, ArrayBufferData *data);void buffer_transfer_storage(ant_t *js, ArrayBufferData *from, ArrayBufferData *to);void buffer_move_storage(ant_t *js, ArrayBufferData *from, ArrayBufferData *to);void buffer_detach(ant_t *js, ArrayBufferData *data);
ant_value_t create_arraybuffer_obj(ant_t *js, ArrayBufferData *buffer);ant_value_t create_arraybuffer_copy(ant_t *js, const void *bytes, size_t length);ant_value_t create_resizable_arraybuffer_copy(ant_t *js, const void *bytes, size_t length, size_t max_length);ant_value_t buffer_clone_arraybuffer(ant_t *js, const ArrayBufferData *data);ant_value_t create_shared_arraybuffer_obj(ant_t *js, ArrayBufferData *buffer);
const void *buffer_typedarray_exotic_ops(void);const char *buffer_typedarray_type_name(TypedArrayType type);
ArrayBufferData *create_array_buffer_data(ant_t *js, size_t length);ArrayBufferData *buffer_get_arraybuffer_data(ant_value_t value);TypedArrayData *buffer_get_typedarray_data(ant_value_t value);DataViewData *buffer_get_dataview_data(ant_value_t value);ArrayBufferData *create_external_array_buffer_data(uint8_t *data, size_t length);ArrayBufferData *buffer_storage_holder_new(void);
bool buffer_is_dataview(ant_value_t obj);bool buffer_is_binary_source(ant_value_t value);bool buffer_can_transfer(const ArrayBufferData *data);
bool buffer_source_get_bytes(ant_t *js, ant_value_t value, const uint8_t **out, size_t *len);bool buffer_typedarray_data_read_index(ant_t *js, const TypedArrayData *ta_data, size_t index, ant_value_t *out);bool buffer_typedarray_read_index(ant_t *js, ant_value_t value, size_t index, ant_value_t *out);bool buffer_typedarray_get_index(ant_t *js, ant_value_t obj, uint32_t index, ant_value_t *out);bool buffer_typedarray_set_index(ant_t *js, ant_value_t obj, uint32_t index, ant_value_t value, ant_value_t *result);
bool buffer_bytes_to_string( ant_t *js, const uint8_t *data, size_t len, const char *encoding, size_t encoding_len, ant_value_t *out);
ant_value_t create_typed_array( ant_t *js, TypedArrayType type, ArrayBufferData *buffer, size_t byte_offset, size_t length, ant_value_t proto);
ant_value_t create_typed_array_with_buffer( ant_t *js, TypedArrayType type, ArrayBufferData *buffer, size_t byte_offset, size_t length, ant_value_t proto, ant_value_t arraybuffer_obj);
ant_value_t create_dataview_with_buffer( ant_t *js, ArrayBufferData *buffer, size_t byte_offset, size_t byte_length, ant_value_t arraybuffer_obj);
static inline bool Ant_Buffer_IsLive(const ArrayBufferData *buffer) { return buffer && !buffer->is_detached;}
#define Ant_Buffer_ViewIsLive(view) ({ \ typeof(view) _ant_view = (view); \ _ant_view && Ant_Buffer_IsLive(_ant_view->buffer); \})
#define Ant_Buffer_GetViewBytes(view, ptr, len) ({ \ typeof(view) _ant_bytes_view = (view); \ bool _ant_bytes_live = Ant_Buffer_ViewIsLive(_ant_bytes_view); \ *(ptr) = _ant_bytes_live \ ? _ant_bytes_view->buffer->data + _ant_bytes_view->byte_offset \ : NULL; \ *(len) = _ant_bytes_live ? _ant_bytes_view->byte_length : 0; \ _ant_bytes_live; \})
#endif