1 // Copyright 2021 The Chromium Authors 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #ifndef BASE_STRINGS_STRING_PIECE_RUST_H_ 6 #define BASE_STRINGS_STRING_PIECE_RUST_H_ 7 8 #include <stdint.h> 9 10 #include "base/rust_buildflags.h" 11 #include "base/strings/string_piece.h" 12 #include "third_party/rust/cxx/v1/cxx.h" 13 14 #if !BUILDFLAG(BUILD_RUST_BASE_CONVERSIONS) 15 #error "string_piece_rust.h included without BUILD_RUST_BASE_CONVERSIONS" 16 #endif 17 18 namespace base { 19 20 // Create a Rust str from a base::BasicStringPiece. This will call std::abort 21 // if there is any invalid UTF8. If you're concerned about this, then 22 // instead use StringPieceToRustSlice and convert the data to a string on 23 // the Rust side (or pass in a std::string). StringPieceToRustStrUTF8(StringPiece string_piece)24inline rust::Str StringPieceToRustStrUTF8(StringPiece string_piece) { 25 return rust::Str(string_piece.data(), string_piece.size()); 26 } 27 28 // Create a Rust slice from a StringPiece. No UTF8 check is performed. StringPieceToRustSlice(StringPiece string_piece)29inline rust::Slice<const uint8_t> StringPieceToRustSlice( 30 StringPiece string_piece) { 31 return rust::Slice<const uint8_t>( 32 reinterpret_cast<const uint8_t*>(string_piece.data()), 33 string_piece.length() * sizeof(StringPiece::value_type)); 34 } 35 36 // Create a StringPiece from a Rust str. RustStrToStringPiece(rust::Str str)37inline StringPiece RustStrToStringPiece(rust::Str str) { 38 return StringPiece(str.data(), str.size()); 39 } 40 41 } // namespace base 42 43 #endif // BASE_STRINGS_STRING_PIECE_RUST_H_ 44