src: remove icu usage from node_string.cc

PR-URL: #46548
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: Michael Dawson <midawson@redhat.com>
Reviewed-By: James M Snell <jasnell@gmail.com>

src/inspector/node_string.cc

@@ -1,9 +1,8 @@
 #include "node_string.h"
 #include "node/inspector/protocol/Protocol.h"
+#include "node_util.h"
 #include "simdutf.h"
 
-#include <unicode/unistr.h>
-
 namespace node {
 namespace inspector {
 namespace protocol {
@@ -12,27 +11,34 @@ namespace StringUtil {
 size_t kNotFound = std::string::npos;
 
 // NOLINTNEXTLINE(runtime/references) V8 API requirement
-void builderAppendQuotedString(StringBuilder& builder, const String& string) {
+void builderAppendQuotedString(StringBuilder& builder,
+                               const std::string_view string) {
   builder.put('"');
   if (!string.empty()) {
-    icu::UnicodeString utf16 = icu::UnicodeString::fromUTF8(
-        icu::StringPiece(string.data(), string.length()));
-    escapeWideStringForJSON(
-        reinterpret_cast<const uint16_t*>(utf16.getBuffer()), utf16.length(),
-        &builder);
+    size_t expected_utf16_length =
+        simdutf::utf16_length_from_utf8(string.data(), string.length());
+    MaybeStackBuffer<char16_t> buffer(expected_utf16_length);
+    size_t utf16_length = simdutf::convert_utf8_to_utf16(
+        string.data(), string.length(), buffer.out());
+    CHECK_EQ(expected_utf16_length, utf16_length);
+    escapeWideStringForJSON(reinterpret_cast<const uint16_t*>(buffer.out()),
+                            utf16_length,
+                            &builder);
   }
   builder.put('"');
 }
 
-std::unique_ptr<Value> parseJSON(const String& string) {
+std::unique_ptr<Value> parseJSON(const std::string_view string) {
   if (string.empty())
     return nullptr;
-
-  icu::UnicodeString utf16 =
-      icu::UnicodeString::fromUTF8(icu::StringPiece(string.data(),
-                                                    string.length()));
-  return parseJSONCharacters(
-      reinterpret_cast<const uint16_t*>(utf16.getBuffer()), utf16.length());
+  size_t expected_utf16_length =
+      simdutf::utf16_length_from_utf8(string.data(), string.length());
+  MaybeStackBuffer<char16_t> buffer(expected_utf16_length);
+  size_t utf16_length = simdutf::convert_utf8_to_utf16(
+      string.data(), string.length(), buffer.out());
+  CHECK_EQ(expected_utf16_length, utf16_length);
+  return parseJSONCharacters(reinterpret_cast<const uint16_t*>(buffer.out()),
+                             utf16_length);
 }
 
 std::unique_ptr<Value> parseJSON(v8_inspector::StringView string) {
@@ -50,24 +56,15 @@ String StringViewToUtf8(v8_inspector::StringView view) {
     return std::string(reinterpret_cast<const char*>(view.characters8()),
                        view.length());
   }
-  const uint16_t* source = view.characters16();
-  const UChar* unicodeSource = reinterpret_cast<const UChar*>(source);
-  static_assert(sizeof(*source) == sizeof(*unicodeSource),
-                "sizeof(*source) == sizeof(*unicodeSource)");
-
-  size_t result_length = view.length() * sizeof(*source);
-  std::string result(result_length, '\0');
-  icu::UnicodeString utf16(unicodeSource, view.length());
-  // ICU components for std::string compatibility are not enabled in build...
-  bool done = false;
-  while (!done) {
-    icu::CheckedArrayByteSink sink(&result[0], result_length);
-    utf16.toUTF8(sink);
-    result_length = sink.NumberOfBytesAppended();
-    result.resize(result_length);
-    done = !sink.Overflowed();
-  }
-  return result;
+  const char16_t* source =
+      reinterpret_cast<const char16_t*>(view.characters16());
+  size_t expected_utf8_length =
+      simdutf::utf8_length_from_utf16(source, view.length());
+  MaybeStackBuffer<char> buffer(expected_utf8_length);
+  size_t utf8_length =
+      simdutf::convert_utf16_to_utf8(source, view.length(), buffer.out());
+  CHECK_EQ(expected_utf8_length, utf8_length);
+  return String(buffer.out(), utf8_length);
 }
 
 String fromDouble(double d) {
@@ -86,7 +83,8 @@ double toDouble(const char* buffer, size_t length, bool* ok) {
   return d;
 }
 
-std::unique_ptr<Value> parseMessage(const std::string& message, bool binary) {
+std::unique_ptr<Value> parseMessage(const std::string_view message,
+                                    bool binary) {
   if (binary) {
     return Value::parseBinary(
         reinterpret_cast<const uint8_t*>(message.data()),
@@ -109,16 +107,21 @@ String fromUTF8(const uint8_t* data, size_t length) {
 }
 
 String fromUTF16(const uint16_t* data, size_t length) {
-  icu::UnicodeString utf16(reinterpret_cast<const char16_t*>(data), length);
-  std::string result;
-  return utf16.toUTF8String(result);
+  auto casted_data = reinterpret_cast<const char16_t*>(data);
+  size_t expected_utf8_length =
+      simdutf::utf8_length_from_utf16(casted_data, length);
+  MaybeStackBuffer<char> buffer(expected_utf8_length);
+  size_t utf8_length =
+      simdutf::convert_utf16_to_utf8(casted_data, length, buffer.out());
+  CHECK_EQ(expected_utf8_length, utf8_length);
+  return String(buffer.out(), utf8_length);
 }
 
-const uint8_t* CharactersUTF8(const String& s) {
+const uint8_t* CharactersUTF8(const std::string_view s) {
   return reinterpret_cast<const uint8_t*>(s.data());
 }
 
-size_t CharacterCount(const String& s) {
+size_t CharacterCount(const std::string_view s) {
   // TODO(@anonrig): Test to make sure CharacterCount returns correctly.
   return simdutf::utf32_length_from_utf8(s.data(), s.length());
 }

src/inspector/node_string.h

@@ -64,21 +64,26 @@ double toDouble(const char* buffer, size_t length, bool* ok);
 String StringViewToUtf8(v8_inspector::StringView view);
 
 // NOLINTNEXTLINE(runtime/references)
-void builderAppendQuotedString(StringBuilder& builder, const String&);
-std::unique_ptr<Value> parseJSON(const String&);
+void builderAppendQuotedString(StringBuilder& builder, const std::string_view);
+std::unique_ptr<Value> parseJSON(const std::string_view);
 std::unique_ptr<Value> parseJSON(v8_inspector::StringView view);
 
-std::unique_ptr<Value> parseMessage(const std::string& message, bool binary);
+std::unique_ptr<Value> parseMessage(const std::string_view message,
+                                    bool binary);
 ProtocolMessage jsonToMessage(String message);
 ProtocolMessage binaryToMessage(std::vector<uint8_t> message);
 String fromUTF8(const uint8_t* data, size_t length);
 String fromUTF16(const uint16_t* data, size_t length);
-const uint8_t* CharactersUTF8(const String& s);
-size_t CharacterCount(const String& s);
+const uint8_t* CharactersUTF8(const std::string_view s);
+size_t CharacterCount(const std::string_view s);
 
 // Unimplemented. The generated code will fall back to CharactersUTF8().
-inline uint8_t* CharactersLatin1(const String& s) { return nullptr; }
-inline const uint16_t* CharactersUTF16(const String& s) { return nullptr; }
+inline uint8_t* CharactersLatin1(const std::string_view s) {
+  return nullptr;
+}
+inline const uint16_t* CharactersUTF16(const std::string_view s) {
+  return nullptr;
+}
 
 extern size_t kNotFound;
 }  // namespace StringUtil
@@ -92,7 +97,7 @@ class Binary {
   const uint8_t* data() const { UNREACHABLE(); }
   size_t size() const { UNREACHABLE(); }
   String toBase64() const { UNREACHABLE(); }
-  static Binary fromBase64(const String& base64, bool* success) {
+  static Binary fromBase64(const std::string_view base64, bool* success) {
     UNREACHABLE();
   }
   static Binary fromSpan(const uint8_t* data, size_t size) { UNREACHABLE(); }