src: use ArrayBufferViewContents more frequently

Using `ArrayBufferViewContents` over
`Buffer::Data()`/`Buffer::Length()` or `SPREAD_BUFFER_ARG` has the
advantages of creating fewer individual variables to keep track off,
not being a “magic” macro that creates variables, reducing code size,
and being faster when receiving on-heap TypedArrays.

PR-URL: https://github.com/nodejs/node/pull/27920
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: Sam Roberts <vieuxtech@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>

1 files changed, 6 insertions, 8 deletions

diff --git a/src/node_i18n.cc b/src/node_i18n.cc
index 8ccda35056..ad5c828392 100644
--- a/src/node_i18n.cc
+++ b/src/node_i18n.cc
@@ -205,14 +205,13 @@ class ConverterObject : public BaseObject, Converter {
 
     ConverterObject* converter;
     ASSIGN_OR_RETURN_UNWRAP(&converter, args[0].As<Object>());
-    SPREAD_BUFFER_ARG(args[1], input_obj);
+    ArrayBufferViewContents<char> input(args[1]);
     int flags = args[2]->Uint32Value(env->context()).ToChecked();
 
     UErrorCode status = U_ZERO_ERROR;
     MaybeStackBuffer<UChar> result;
     MaybeLocal<Object> ret;
-    size_t limit = ucnv_getMinCharSize(converter->conv) *
-                   input_obj_length;
+    size_t limit = ucnv_getMinCharSize(converter->conv) * input.length();
     if (limit > 0)
       result.AllocateSufficientStorage(limit);
 
@@ -225,8 +224,8 @@ class ConverterObject : public BaseObject, Converter {
       }
     });
 
-    const char* source = input_obj_data;
-    size_t source_length = input_obj_length;
+    const char* source = input.data();
+    size_t source_length = input.length();
 
     if (converter->unicode_ && !converter->ignoreBOM_ && !converter->bomSeen_) {
       int32_t bomOffset = 0;
@@ -455,8 +454,7 @@ void Transcode(const FunctionCallbackInfo<Value>&args) {
   UErrorCode status = U_ZERO_ERROR;
   MaybeLocal<Object> result;
 
-  CHECK(Buffer::HasInstance(args[0]));
-  SPREAD_BUFFER_ARG(args[0], ts_obj);
+  ArrayBufferViewContents<char> input(args[0]);
   const enum encoding fromEncoding = ParseEncoding(isolate, args[1], BUFFER);
   const enum encoding toEncoding = ParseEncoding(isolate, args[2], BUFFER);
 
@@ -490,7 +488,7 @@ void Transcode(const FunctionCallbackInfo<Value>&args) {
     }
 
     result = tfn(env, EncodingName(fromEncoding), EncodingName(toEncoding),
-                 ts_obj_data, ts_obj_length, &status);
+                 input.data(), input.length(), &status);
   } else {
     status = U_ILLEGAL_ARGUMENT_ERROR;
   }