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js_native_api.h
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#ifndef SRC_JS_NATIVE_API_H_
#define SRC_JS_NATIVE_API_H_
// This file needs to be compatible with C compilers.
#include <stdbool.h> // NOLINT(modernize-deprecated-headers)
#include <stddef.h> // NOLINT(modernize-deprecated-headers)
// Use INT_MAX, this should only be consumed by the pre-processor anyway.
#define NAPI_VERSION_EXPERIMENTAL 2147483647
#ifndef NAPI_VERSION
#ifdef NAPI_EXPERIMENTAL
#define NAPI_VERSION NAPI_VERSION_EXPERIMENTAL
#else
// The baseline version for N-API.
// The NAPI_VERSION controls which version will be used by default when
// compilling a native addon. If the addon developer specifically wants to use
// functions available in a new version of N-API that is not yet ported in all
// LTS versions, they can set NAPI_VERSION knowing that they have specifically
// depended on that version.
#define NAPI_VERSION 8
#endif
#endif
#include "js_native_api_types.h"
// If you need __declspec(dllimport), either include <node_api.h> instead, or
// define NAPI_EXTERN as __declspec(dllimport) on the compiler's command line.
#ifndef NAPI_EXTERN
#ifdef _WIN32
#define NAPI_EXTERN __declspec(dllexport)
#elif defined(__wasm32__)
#define NAPI_EXTERN \
__attribute__((visibility("default"))) \
__attribute__((__import_module__("napi")))
#else
#define NAPI_EXTERN __attribute__((visibility("default")))
#endif
#endif
#define NAPI_AUTO_LENGTH SIZE_MAX
#ifdef __cplusplus
#define EXTERN_C_START extern "C" {
#define EXTERN_C_END }
#else
#define EXTERN_C_START
#define EXTERN_C_END
#endif
EXTERN_C_START
NAPI_EXTERN napi_status NAPI_CDECL
napi_get_last_error_info(napi_env env, const napi_extended_error_info** result);
// Getters for defined singletons
NAPI_EXTERN napi_status NAPI_CDECL napi_get_undefined(napi_env env,
napi_value* result);
NAPI_EXTERN napi_status NAPI_CDECL napi_get_null(napi_env env,
napi_value* result);
NAPI_EXTERN napi_status NAPI_CDECL napi_get_global(napi_env env,
napi_value* result);
NAPI_EXTERN napi_status NAPI_CDECL napi_get_boolean(napi_env env,
bool value,
napi_value* result);
// Methods to create Primitive types/Objects
NAPI_EXTERN napi_status NAPI_CDECL napi_create_object(napi_env env,
napi_value* result);
NAPI_EXTERN napi_status NAPI_CDECL napi_create_array(napi_env env,
napi_value* result);
NAPI_EXTERN napi_status NAPI_CDECL
napi_create_array_with_length(napi_env env, size_t length, napi_value* result);
NAPI_EXTERN napi_status NAPI_CDECL napi_create_double(napi_env env,
double value,
napi_value* result);
NAPI_EXTERN napi_status NAPI_CDECL napi_create_int32(napi_env env,
int32_t value,
napi_value* result);
NAPI_EXTERN napi_status NAPI_CDECL napi_create_uint32(napi_env env,
uint32_t value,
napi_value* result);
NAPI_EXTERN napi_status NAPI_CDECL napi_create_int64(napi_env env,
int64_t value,
napi_value* result);
NAPI_EXTERN napi_status NAPI_CDECL napi_create_string_latin1(
napi_env env, const char* str, size_t length, napi_value* result);
NAPI_EXTERN napi_status NAPI_CDECL napi_create_string_utf8(napi_env env,
const char* str,
size_t length,
napi_value* result);
NAPI_EXTERN napi_status NAPI_CDECL napi_create_string_utf16(napi_env env,
const char16_t* str,
size_t length,
napi_value* result);
NAPI_EXTERN napi_status NAPI_CDECL napi_create_symbol(napi_env env,
napi_value description,
napi_value* result);
#ifdef NAPI_EXPERIMENTAL
NAPI_EXTERN napi_status NAPI_CDECL
node_api_symbol_for(napi_env env,
const char* utf8description,
size_t length,
napi_value* result);
#endif // NAPI_EXPERIMENTAL
NAPI_EXTERN napi_status NAPI_CDECL napi_create_function(napi_env env,
const char* utf8name,
size_t length,
napi_callback cb,
void* data,
napi_value* result);
NAPI_EXTERN napi_status NAPI_CDECL napi_create_error(napi_env env,
napi_value code,
napi_value msg,
napi_value* result);
NAPI_EXTERN napi_status NAPI_CDECL napi_create_type_error(napi_env env,
napi_value code,
napi_value msg,
napi_value* result);
NAPI_EXTERN napi_status NAPI_CDECL napi_create_range_error(napi_env env,
napi_value code,
napi_value msg,
napi_value* result);
#ifdef NAPI_EXPERIMENTAL
NAPI_EXTERN napi_status NAPI_CDECL node_api_create_syntax_error(
napi_env env, napi_value code, napi_value msg, napi_value* result);
#endif // NAPI_EXPERIMENTAL
// Methods to get the native napi_value from Primitive type
NAPI_EXTERN napi_status NAPI_CDECL napi_typeof(napi_env env,
napi_value value,
napi_valuetype* result);
NAPI_EXTERN napi_status NAPI_CDECL napi_get_value_double(napi_env env,
napi_value value,
double* result);
NAPI_EXTERN napi_status NAPI_CDECL napi_get_value_int32(napi_env env,
napi_value value,
int32_t* result);
NAPI_EXTERN napi_status NAPI_CDECL napi_get_value_uint32(napi_env env,
napi_value value,
uint32_t* result);
NAPI_EXTERN napi_status NAPI_CDECL napi_get_value_int64(napi_env env,
napi_value value,
int64_t* result);
NAPI_EXTERN napi_status NAPI_CDECL napi_get_value_bool(napi_env env,
napi_value value,
bool* result);
// Copies LATIN-1 encoded bytes from a string into a buffer.
NAPI_EXTERN napi_status NAPI_CDECL napi_get_value_string_latin1(
napi_env env, napi_value value, char* buf, size_t bufsize, size_t* result);
// Copies UTF-8 encoded bytes from a string into a buffer.
NAPI_EXTERN napi_status NAPI_CDECL napi_get_value_string_utf8(
napi_env env, napi_value value, char* buf, size_t bufsize, size_t* result);
// Copies UTF-16 encoded bytes from a string into a buffer.
NAPI_EXTERN napi_status NAPI_CDECL napi_get_value_string_utf16(napi_env env,
napi_value value,
char16_t* buf,
size_t bufsize,
size_t* result);
// Methods to coerce values
// These APIs may execute user scripts
NAPI_EXTERN napi_status NAPI_CDECL napi_coerce_to_bool(napi_env env,
napi_value value,
napi_value* result);
NAPI_EXTERN napi_status NAPI_CDECL napi_coerce_to_number(napi_env env,
napi_value value,
napi_value* result);
NAPI_EXTERN napi_status NAPI_CDECL napi_coerce_to_object(napi_env env,
napi_value value,
napi_value* result);
NAPI_EXTERN napi_status NAPI_CDECL napi_coerce_to_string(napi_env env,
napi_value value,
napi_value* result);
// Methods to work with Objects
NAPI_EXTERN napi_status NAPI_CDECL napi_get_prototype(napi_env env,
napi_value object,
napi_value* result);
NAPI_EXTERN napi_status NAPI_CDECL napi_get_property_names(napi_env env,
napi_value object,
napi_value* result);
NAPI_EXTERN napi_status NAPI_CDECL napi_set_property(napi_env env,
napi_value object,
napi_value key,
napi_value value);
NAPI_EXTERN napi_status NAPI_CDECL napi_has_property(napi_env env,
napi_value object,
napi_value key,
bool* result);
NAPI_EXTERN napi_status NAPI_CDECL napi_get_property(napi_env env,
napi_value object,
napi_value key,
napi_value* result);
NAPI_EXTERN napi_status NAPI_CDECL napi_delete_property(napi_env env,
napi_value object,
napi_value key,
bool* result);
NAPI_EXTERN napi_status NAPI_CDECL napi_has_own_property(napi_env env,
napi_value object,
napi_value key,
bool* result);
NAPI_EXTERN napi_status NAPI_CDECL napi_set_named_property(napi_env env,
napi_value object,
const char* utf8name,
napi_value value);
NAPI_EXTERN napi_status NAPI_CDECL napi_has_named_property(napi_env env,
napi_value object,
const char* utf8name,
bool* result);
NAPI_EXTERN napi_status NAPI_CDECL napi_get_named_property(napi_env env,
napi_value object,
const char* utf8name,
napi_value* result);
NAPI_EXTERN napi_status NAPI_CDECL napi_set_element(napi_env env,
napi_value object,
uint32_t index,
napi_value value);
NAPI_EXTERN napi_status NAPI_CDECL napi_has_element(napi_env env,
napi_value object,
uint32_t index,
bool* result);
NAPI_EXTERN napi_status NAPI_CDECL napi_get_element(napi_env env,
napi_value object,
uint32_t index,
napi_value* result);
NAPI_EXTERN napi_status NAPI_CDECL napi_delete_element(napi_env env,
napi_value object,
uint32_t index,
bool* result);
NAPI_EXTERN napi_status NAPI_CDECL
napi_define_properties(napi_env env,
napi_value object,
size_t property_count,
const napi_property_descriptor* properties);
// Methods to work with Arrays
NAPI_EXTERN napi_status NAPI_CDECL napi_is_array(napi_env env,
napi_value value,
bool* result);
NAPI_EXTERN napi_status NAPI_CDECL napi_get_array_length(napi_env env,
napi_value value,
uint32_t* result);
// Methods to compare values
NAPI_EXTERN napi_status NAPI_CDECL napi_strict_equals(napi_env env,
napi_value lhs,
napi_value rhs,
bool* result);
// Methods to work with Functions
NAPI_EXTERN napi_status NAPI_CDECL napi_call_function(napi_env env,
napi_value recv,
napi_value func,
size_t argc,
const napi_value* argv,
napi_value* result);
NAPI_EXTERN napi_status NAPI_CDECL napi_new_instance(napi_env env,
napi_value constructor,
size_t argc,
const napi_value* argv,
napi_value* result);
NAPI_EXTERN napi_status NAPI_CDECL napi_instanceof(napi_env env,
napi_value object,
napi_value constructor,
bool* result);
// Methods to work with napi_callbacks
// Gets all callback info in a single call. (Ugly, but faster.)
NAPI_EXTERN napi_status NAPI_CDECL napi_get_cb_info(
napi_env env, // [in] NAPI environment handle
napi_callback_info cbinfo, // [in] Opaque callback-info handle
size_t* argc, // [in-out] Specifies the size of the provided argv array
// and receives the actual count of args.
napi_value* argv, // [out] Array of values
napi_value* this_arg, // [out] Receives the JS 'this' arg for the call
void** data); // [out] Receives the data pointer for the callback.
NAPI_EXTERN napi_status NAPI_CDECL napi_get_new_target(
napi_env env, napi_callback_info cbinfo, napi_value* result);
NAPI_EXTERN napi_status NAPI_CDECL
napi_define_class(napi_env env,
const char* utf8name,
size_t length,
napi_callback constructor,
void* data,
size_t property_count,
const napi_property_descriptor* properties,
napi_value* result);
// Methods to work with external data objects
NAPI_EXTERN napi_status NAPI_CDECL napi_wrap(napi_env env,
napi_value js_object,
void* native_object,
napi_finalize finalize_cb,
void* finalize_hint,
napi_ref* result);
NAPI_EXTERN napi_status NAPI_CDECL napi_unwrap(napi_env env,
napi_value js_object,
void** result);
NAPI_EXTERN napi_status NAPI_CDECL napi_remove_wrap(napi_env env,
napi_value js_object,
void** result);
NAPI_EXTERN napi_status NAPI_CDECL
napi_create_external(napi_env env,
void* data,
napi_finalize finalize_cb,
void* finalize_hint,
napi_value* result);
NAPI_EXTERN napi_status NAPI_CDECL napi_get_value_external(napi_env env,
napi_value value,
void** result);
// Methods to control object lifespan
// Set initial_refcount to 0 for a weak reference, >0 for a strong reference.
NAPI_EXTERN napi_status NAPI_CDECL
napi_create_reference(napi_env env,
napi_value value,
uint32_t initial_refcount,
napi_ref* result);
// Deletes a reference. The referenced value is released, and may
// be GC'd unless there are other references to it.
NAPI_EXTERN napi_status NAPI_CDECL napi_delete_reference(napi_env env,
napi_ref ref);
// Increments the reference count, optionally returning the resulting count.
// After this call the reference will be a strong reference because its
// refcount is >0, and the referenced object is effectively "pinned".
// Calling this when the refcount is 0 and the object is unavailable
// results in an error.
NAPI_EXTERN napi_status NAPI_CDECL napi_reference_ref(napi_env env,
napi_ref ref,
uint32_t* result);
// Decrements the reference count, optionally returning the resulting count.
// If the result is 0 the reference is now weak and the object may be GC'd
// at any time if there are no other references. Calling this when the
// refcount is already 0 results in an error.
NAPI_EXTERN napi_status NAPI_CDECL napi_reference_unref(napi_env env,
napi_ref ref,
uint32_t* result);
// Attempts to get a referenced value. If the reference is weak,
// the value might no longer be available, in that case the call
// is still successful but the result is NULL.
NAPI_EXTERN napi_status NAPI_CDECL napi_get_reference_value(napi_env env,
napi_ref ref,
napi_value* result);
NAPI_EXTERN napi_status NAPI_CDECL
napi_open_handle_scope(napi_env env, napi_handle_scope* result);
NAPI_EXTERN napi_status NAPI_CDECL
napi_close_handle_scope(napi_env env, napi_handle_scope scope);
NAPI_EXTERN napi_status NAPI_CDECL napi_open_escapable_handle_scope(
napi_env env, napi_escapable_handle_scope* result);
NAPI_EXTERN napi_status NAPI_CDECL napi_close_escapable_handle_scope(
napi_env env, napi_escapable_handle_scope scope);
NAPI_EXTERN napi_status NAPI_CDECL
napi_escape_handle(napi_env env,
napi_escapable_handle_scope scope,
napi_value escapee,
napi_value* result);
// Methods to support error handling
NAPI_EXTERN napi_status NAPI_CDECL napi_throw(napi_env env, napi_value error);
NAPI_EXTERN napi_status NAPI_CDECL napi_throw_error(napi_env env,
const char* code,
const char* msg);
NAPI_EXTERN napi_status NAPI_CDECL napi_throw_type_error(napi_env env,
const char* code,
const char* msg);
NAPI_EXTERN napi_status NAPI_CDECL napi_throw_range_error(napi_env env,
const char* code,
const char* msg);
#ifdef NAPI_EXPERIMENTAL
NAPI_EXTERN napi_status NAPI_CDECL node_api_throw_syntax_error(napi_env env,
const char* code,
const char* msg);
#endif // NAPI_EXPERIMENTAL
NAPI_EXTERN napi_status NAPI_CDECL napi_is_error(napi_env env,
napi_value value,
bool* result);
// Methods to support catching exceptions
NAPI_EXTERN napi_status NAPI_CDECL napi_is_exception_pending(napi_env env,
bool* result);
NAPI_EXTERN napi_status NAPI_CDECL
napi_get_and_clear_last_exception(napi_env env, napi_value* result);
// Methods to work with array buffers and typed arrays
NAPI_EXTERN napi_status NAPI_CDECL napi_is_arraybuffer(napi_env env,
napi_value value,
bool* result);
NAPI_EXTERN napi_status NAPI_CDECL napi_create_arraybuffer(napi_env env,
size_t byte_length,
void** data,
napi_value* result);
NAPI_EXTERN napi_status NAPI_CDECL
napi_create_external_arraybuffer(napi_env env,
void* external_data,
size_t byte_length,
napi_finalize finalize_cb,
void* finalize_hint,
napi_value* result);
NAPI_EXTERN napi_status NAPI_CDECL napi_get_arraybuffer_info(
napi_env env, napi_value arraybuffer, void** data, size_t* byte_length);
NAPI_EXTERN napi_status NAPI_CDECL napi_is_typedarray(napi_env env,
napi_value value,
bool* result);
NAPI_EXTERN napi_status NAPI_CDECL
napi_create_typedarray(napi_env env,
napi_typedarray_type type,
size_t length,
napi_value arraybuffer,
size_t byte_offset,
napi_value* result);
NAPI_EXTERN napi_status NAPI_CDECL
napi_get_typedarray_info(napi_env env,
napi_value typedarray,
napi_typedarray_type* type,
size_t* length,
void** data,
napi_value* arraybuffer,
size_t* byte_offset);
NAPI_EXTERN napi_status NAPI_CDECL napi_create_dataview(napi_env env,
size_t length,
napi_value arraybuffer,
size_t byte_offset,
napi_value* result);
NAPI_EXTERN napi_status NAPI_CDECL napi_is_dataview(napi_env env,
napi_value value,
bool* result);
NAPI_EXTERN napi_status NAPI_CDECL
napi_get_dataview_info(napi_env env,
napi_value dataview,
size_t* bytelength,
void** data,
napi_value* arraybuffer,
size_t* byte_offset);
// version management
NAPI_EXTERN napi_status NAPI_CDECL napi_get_version(napi_env env,
uint32_t* result);
// Promises
NAPI_EXTERN napi_status NAPI_CDECL napi_create_promise(napi_env env,
napi_deferred* deferred,
napi_value* promise);
NAPI_EXTERN napi_status NAPI_CDECL napi_resolve_deferred(napi_env env,
napi_deferred deferred,
napi_value resolution);
NAPI_EXTERN napi_status NAPI_CDECL napi_reject_deferred(napi_env env,
napi_deferred deferred,
napi_value rejection);
NAPI_EXTERN napi_status NAPI_CDECL napi_is_promise(napi_env env,
napi_value value,
bool* is_promise);
// Running a script
NAPI_EXTERN napi_status NAPI_CDECL napi_run_script(napi_env env,
napi_value script,
napi_value* result);
// Memory management
NAPI_EXTERN napi_status NAPI_CDECL napi_adjust_external_memory(
napi_env env, int64_t change_in_bytes, int64_t* adjusted_value);
#if NAPI_VERSION >= 5
// Dates
NAPI_EXTERN napi_status NAPI_CDECL napi_create_date(napi_env env,
double time,
napi_value* result);
NAPI_EXTERN napi_status NAPI_CDECL napi_is_date(napi_env env,
napi_value value,
bool* is_date);
NAPI_EXTERN napi_status NAPI_CDECL napi_get_date_value(napi_env env,
napi_value value,
double* result);
// Add finalizer for pointer
NAPI_EXTERN napi_status NAPI_CDECL napi_add_finalizer(napi_env env,
napi_value js_object,
void* native_object,
napi_finalize finalize_cb,
void* finalize_hint,
napi_ref* result);
#endif // NAPI_VERSION >= 5
#if NAPI_VERSION >= 6
// BigInt
NAPI_EXTERN napi_status NAPI_CDECL napi_create_bigint_int64(napi_env env,
int64_t value,
napi_value* result);
NAPI_EXTERN napi_status NAPI_CDECL
napi_create_bigint_uint64(napi_env env, uint64_t value, napi_value* result);
NAPI_EXTERN napi_status NAPI_CDECL
napi_create_bigint_words(napi_env env,
int sign_bit,
size_t word_count,
const uint64_t* words,
napi_value* result);
NAPI_EXTERN napi_status NAPI_CDECL napi_get_value_bigint_int64(napi_env env,
napi_value value,
int64_t* result,
bool* lossless);
NAPI_EXTERN napi_status NAPI_CDECL napi_get_value_bigint_uint64(
napi_env env, napi_value value, uint64_t* result, bool* lossless);
NAPI_EXTERN napi_status NAPI_CDECL
napi_get_value_bigint_words(napi_env env,
napi_value value,
int* sign_bit,
size_t* word_count,
uint64_t* words);
// Object
NAPI_EXTERN napi_status NAPI_CDECL
napi_get_all_property_names(napi_env env,
napi_value object,
napi_key_collection_mode key_mode,
napi_key_filter key_filter,
napi_key_conversion key_conversion,
napi_value* result);
// Instance data
NAPI_EXTERN napi_status NAPI_CDECL napi_set_instance_data(
napi_env env, void* data, napi_finalize finalize_cb, void* finalize_hint);
NAPI_EXTERN napi_status NAPI_CDECL napi_get_instance_data(napi_env env,
void** data);
#endif // NAPI_VERSION >= 6
#if NAPI_VERSION >= 7
// ArrayBuffer detaching
NAPI_EXTERN napi_status NAPI_CDECL
napi_detach_arraybuffer(napi_env env, napi_value arraybuffer);
NAPI_EXTERN napi_status NAPI_CDECL
napi_is_detached_arraybuffer(napi_env env, napi_value value, bool* result);
#endif // NAPI_VERSION >= 7
#if NAPI_VERSION >= 8
// Type tagging
NAPI_EXTERN napi_status NAPI_CDECL napi_type_tag_object(
napi_env env, napi_value value, const napi_type_tag* type_tag);
NAPI_EXTERN napi_status NAPI_CDECL
napi_check_object_type_tag(napi_env env,
napi_value value,
const napi_type_tag* type_tag,
bool* result);
NAPI_EXTERN napi_status NAPI_CDECL napi_object_freeze(napi_env env,
napi_value object);
NAPI_EXTERN napi_status NAPI_CDECL napi_object_seal(napi_env env,
napi_value object);
#endif // NAPI_VERSION >= 8
EXTERN_C_END
#endif // SRC_JS_NATIVE_API_H_