[napi] Implement `napi_create_bigint_words`

warning: not tested

4 files changed, 42 insertions, 9 deletions

diff --git a/src/bun.js/bindings/napi.cpp b/src/bun.js/bindings/napi.cpp
index 943f37688..96489f081 100644
--- a/src/bun.js/bindings/napi.cpp
+++ b/src/bun.js/bindings/napi.cpp
@@ -46,6 +46,7 @@
 #include "JavaScriptCore/GetterSetter.h"
 #include "JavaScriptCore/JSSourceCode.h"
 #include "JavaScriptCore/JSNativeStdFunction.h"
+#include "JavaScriptCore/BigIntObject.h"
 
 #include "../modules/ObjectModule.h"
 
@@ -1507,4 +1508,33 @@ extern "C" napi_status napi_set_instance_data(napi_env env,
     globalObject->napiInstanceDataFinalizerHint = finalize_hint;
 
     return napi_ok;
+}
+
+extern "C" napi_status napi_create_bigint_words(napi_env env,
+    int sign_bit,
+    size_t word_count,
+    const uint64_t* words,
+    napi_value* result)
+{
+    Zig::GlobalObject* globalObject = toJS(env);
+    JSC::VM& vm = globalObject->vm();
+    auto* bigint = JSC::JSBigInt::tryCreateWithLength(vm, word_count);
+    if (UNLIKELY(!bigint)) {
+        return napi_generic_failure;
+    }
+
+    // TODO: verify sign bit is consistent
+    bigint->setSign(sign_bit);
+
+    if (words != nullptr) {
+        const uint64_t* word = words;
+        // TODO: add fast path that uses memcpy here instead of setDigit
+        // we need to add this to JSC. V8 has this optimization
+        for (size_t i = 0; i < word_count; i++) {
+            bigint->setDigit(i, *word++);
+        }
+    }
+
+    *result = toNapi(bigint);
+    return napi_ok;
 }
\ No newline at end of file
diff --git a/src/napi/napi.zig b/src/napi/napi.zig
index 0f868fe43..bcbbaf417 100644
--- a/src/napi/napi.zig
+++ b/src/napi/napi.zig
@@ -1510,6 +1510,7 @@ pub fn fixDeadCodeElimination() void {
     std.mem.doNotOptimizeAway(&napi_get_value_external);
     std.mem.doNotOptimizeAway(&napi_get_instance_data);
     std.mem.doNotOptimizeAway(&napi_set_instance_data);
+    std.mem.doNotOptimizeAway(&napi_create_bigint_words);
 
     std.mem.doNotOptimizeAway(&@import("../bun.js/node/buffer.zig").BufferVectorized.fill);
 }
diff --git a/src/symbols.dyn b/src/symbols.dyn
index 9eeed901e..e0b4b2489 100644
--- a/src/symbols.dyn
+++ b/src/symbols.dyn
@@ -12,18 +12,20 @@
     _napi_coerce_to_number;
     _napi_coerce_to_object;
     _napi_coerce_to_string;
-    _napi_create_array_with_length;
     _napi_create_array;
+    _napi_create_array_with_length;
     _napi_create_arraybuffer;
     _napi_create_async_work;
     _napi_create_bigint_int64;
     _napi_create_bigint_uint64;
-    _napi_create_buffer_copy;
+    _napi_create_bigint_words;
     _napi_create_buffer;
+    _napi_create_buffer_copy;
     _napi_create_dataview;
     _napi_create_date;
     _napi_create_double;
     _napi_create_error;
+    _napi_create_external;
     _napi_create_external_arraybuffer;
     _napi_create_external_buffer;
     _napi_create_function;
@@ -76,6 +78,7 @@
     _napi_get_value_bigint_uint64;
     _napi_get_value_bool;
     _napi_get_value_double;
+    _napi_get_value_external;
     _napi_get_value_int32;
     _napi_get_value_int64;
     _napi_get_value_string_latin1;
@@ -111,21 +114,19 @@
     _napi_release_threadsafe_function;
     _napi_remove_async_cleanup_hook;
     _napi_remove_env_cleanup_hook;
+    _napi_remove_wrap;
     _napi_resolve_deferred;
     _napi_run_script;
     _napi_set_element;
     _napi_set_named_property;
     _napi_set_property;
     _napi_strict_equals;
+    _napi_throw;
     _napi_throw_error;
     _napi_throw_range_error;
     _napi_throw_type_error;
-    _napi_throw;
     _napi_typeof;
     _napi_unref_threadsafe_function;
     _napi_unwrap;
     _napi_wrap;
-    _napi_remove_wrap;
-    _napi_create_external;
-    _napi_get_value_external;
 };
\ No newline at end of file
diff --git a/src/symbols.txt b/src/symbols.txt
index e88483515..24ae8ee38 100644
--- a/src/symbols.txt
+++ b/src/symbols.txt
@@ -17,12 +17,14 @@ _napi_create_arraybuffer
 _napi_create_async_work
 _napi_create_bigint_int64
 _napi_create_bigint_uint64
+_napi_create_bigint_words
 _napi_create_buffer
 _napi_create_buffer_copy
 _napi_create_dataview
 _napi_create_date
 _napi_create_double
 _napi_create_error
+_napi_create_external
 _napi_create_external_arraybuffer
 _napi_create_external_buffer
 _napi_create_function
@@ -75,6 +77,7 @@ _napi_get_value_bigint_int64
 _napi_get_value_bigint_uint64
 _napi_get_value_bool
 _napi_get_value_double
+_napi_get_value_external
 _napi_get_value_int32
 _napi_get_value_int64
 _napi_get_value_string_latin1
@@ -110,6 +113,7 @@ _napi_reject_deferred
 _napi_release_threadsafe_function
 _napi_remove_async_cleanup_hook
 _napi_remove_env_cleanup_hook
+_napi_remove_wrap
 _napi_resolve_deferred
 _napi_run_script
 _napi_set_element
@@ -124,6 +128,3 @@ _napi_typeof
 _napi_unref_threadsafe_function
 _napi_unwrap
 _napi_wrap
-_napi_remove_wrap
-_napi_create_external
-_napi_get_value_external