Add multi-byte ByteArray access methods to the Dart API.

runtime/vm/dart_api_impl.cc

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "include/dart_api.h"
 
 #include "vm/bigint_operations.h"
 #include "vm/class_finalizer.h"
 #include "vm/compiler.h"
 #include "vm/dart.h"
@@ skipping 1703 matching lines @@
   }
   if (peer == NULL) {
     return Api::NewError("%s expects argument 'peer' to be non-null.",
                          CURRENT_FUNC);
   }
   *peer = array.GetPeer();
   return Api::Success();
 }
 
 
+template<typename T>
+Dart_Handle ByteArrayGetAt(T* value, Dart_Handle array, intptr_t offset) {
+  const ByteArray& array_obj = Api::UnwrapByteArrayHandle(array);
+  if (array_obj.IsNull()) {
+    RETURN_TYPE_ERROR(array, ByteArray);
+  }
+  intptr_t length = sizeof(T);
+  if (!Utils::RangeCheck(offset, length, array_obj.Length())) {
+    return Api::NewError("Invalid index passed in to get byte array element");
+  }
+  uint8_t* dst = reinterpret_cast<uint8_t*>(value);
+  ByteArray::Copy(dst, array_obj, offset, length);
+  return Api::Success();
+}
+
+
+template<typename T>
+Dart_Handle ByteArraySetAt(Dart_Handle array, intptr_t offset, T value) {
+  const ByteArray& array_obj = Api::UnwrapByteArrayHandle(array);
+  if (array_obj.IsNull()) {
+    RETURN_TYPE_ERROR(array, ByteArray);
+  }
+  intptr_t length = sizeof(T);
+  if (!Utils::RangeCheck(offset, length, array_obj.Length())) {
+    return Api::NewError("Invalid index passed in to get byte array element");
+  }
+  const uint8_t* src = reinterpret_cast<uint8_t*>(&value);
+  ByteArray::Copy(array_obj, offset, src, length);
+  return Api::Success();
+}
+
+
+DART_EXPORT Dart_Handle Dart_ByteArrayGetInt8At(Dart_Handle array,
+                                                intptr_t offset,
+                                                int8_t* value) {
+  return ByteArrayGetAt(value, array, offset);
+}
+
+
+DART_EXPORT Dart_Handle Dart_ByteArraySetInt8At(Dart_Handle array,
+                                                intptr_t offset,
+                                                int8_t value) {
+  return ByteArraySetAt(array, offset, value);
+}
+
+
+DART_EXPORT Dart_Handle Dart_ByteArrayGetUint8At(Dart_Handle array,
+                                                 intptr_t offset,
+                                                 uint8_t* value) {
+  return ByteArrayGetAt(value, array, offset);
+}
+
+
+DART_EXPORT Dart_Handle Dart_ByteArraySetUint8At(Dart_Handle array,
+                                                 intptr_t offset,
+                                                 uint8_t value) {
+  return ByteArraySetAt(array, offset, value);
+}
+
+
+DART_EXPORT Dart_Handle Dart_ByteArrayGetInt16At(Dart_Handle array,
+                                                 intptr_t offset,
+                                                 int16_t* value) {
+  return ByteArrayGetAt(value, array, offset);
+}
+
+
+DART_EXPORT Dart_Handle Dart_ByteArraySetInt16At(Dart_Handle array,
+                                                 intptr_t offset,
+                                                 int16_t value) {
+  return ByteArraySetAt(array, offset, value);
+}
+
+
+DART_EXPORT Dart_Handle Dart_ByteArrayGetUint16At(Dart_Handle array,
+                                                  intptr_t offset,
+                                                  uint16_t* value) {
+  return ByteArrayGetAt(value, array, offset);
+}
+
+
+DART_EXPORT Dart_Handle Dart_ByteArraySetUint16At(Dart_Handle array,
+                                                  intptr_t offset,
+                                                  uint16_t value) {
+  return ByteArraySetAt(array, offset, value);
+}
+
+
+DART_EXPORT Dart_Handle Dart_ByteArrayGetInt32At(Dart_Handle array,
+                                                 intptr_t offset,
+                                                 int32_t* value) {
+  return ByteArrayGetAt(value, array, offset);
+}
+
+
+DART_EXPORT Dart_Handle Dart_ByteArraySetInt32At(Dart_Handle array,
+                                                 intptr_t offset,
+                                                 int32_t value) {
+  return ByteArraySetAt(array, offset, value);
+}
+
+
+DART_EXPORT Dart_Handle Dart_ByteArrayGetUint32At(Dart_Handle array,
+                                                  intptr_t offset,
+                                                  uint32_t* value) {
+  return ByteArrayGetAt(value, array, offset);
+}
+
+
+DART_EXPORT Dart_Handle Dart_ByteArraySetUint32At(Dart_Handle array,
+                                                  intptr_t offset,
+                                                  uint32_t value) {
+  return ByteArraySetAt(array, offset, value);
+}
+
+
+DART_EXPORT Dart_Handle Dart_ByteArrayGetInt64At(Dart_Handle array,
+                                                 intptr_t offset,
+                                                 int64_t* value) {
+  return ByteArrayGetAt(value, array, offset);
+}
+
+
+DART_EXPORT Dart_Handle Dart_ByteArraySetInt64At(Dart_Handle array,
+                                                 intptr_t offset,
+                                                 int64_t value) {
+  return ByteArraySetAt(array, offset, value);
+}
+
+
+DART_EXPORT Dart_Handle Dart_ByteArrayGetUint64At(Dart_Handle array,
+                                                  intptr_t offset,
+                                                  uint64_t* value) {
+  return ByteArrayGetAt(value, array, offset);
+}
+
+
+DART_EXPORT Dart_Handle Dart_ByteArraySetUint64At(Dart_Handle array,
+                                                  intptr_t offset,
+                                                  uint64_t value) {
+  return ByteArraySetAt(array, offset, value);
+}
+
+
+DART_EXPORT Dart_Handle Dart_ByteArrayGetFloat32At(Dart_Handle array,
+                                                   intptr_t offset,
+                                                   float* value) {
+  return ByteArrayGetAt(value, array, offset);
+}
+
+
+DART_EXPORT Dart_Handle Dart_ByteArraySetFloat32At(Dart_Handle array,
+                                                   intptr_t offset,
+                                                   float value) {
+  return ByteArraySetAt(array, offset, value);
+}
+
+
+DART_EXPORT Dart_Handle Dart_ByteArrayGetFloat64At(Dart_Handle array,
+                                                   intptr_t offset,
+                                                   double* value) {
+  return ByteArrayGetAt(value, array, offset);
+}
+
+
+DART_EXPORT Dart_Handle Dart_ByteArraySetFloat64At(Dart_Handle array,
+                                                   intptr_t offset,
+                                                   double value) {
+  return ByteArraySetAt(array, offset, value);
+}
+
+
 // --- Closures ---
 
 
 DART_EXPORT bool Dart_IsClosure(Dart_Handle object) {
   DARTSCOPE(Isolate::Current());
   const Object& obj = Object::Handle(Api::UnwrapHandle(object));
   return obj.IsClosure();
 }
 
 
@@ skipping 769 matching lines @@
       *buffer = NULL;
     }
     delete debug_region;
   } else {
     *buffer = NULL;
     *buffer_size = 0;
   }
 }
 
 }  // namespace dart