1 // Copyright 2024 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_VIEW_RUST_H_ 6 #define BASE_STRINGS_STRING_VIEW_RUST_H_ 7 8 #include <stdint.h> 9 10 #include <string_view> 11 12 #include "build/build_config.h" 13 #include "third_party/rust/cxx/v1/cxx.h" 14 15 #if BUILDFLAG(IS_NACL) 16 #error "string_view_rust.h included under IS_NACL" 17 #endif 18 19 namespace base { 20 21 // Create a Rust str from a std::string_view. This will call std::abort 22 // if there is any invalid UTF8. If you're concerned about this, then 23 // instead use StringViewToRustSlice and convert the data to a string on 24 // the Rust side (or pass in a std::string). StringViewToRustStrUTF8(std::string_view string_piece)25inline rust::Str StringViewToRustStrUTF8(std::string_view string_piece) { 26 return rust::Str(string_piece.data(), string_piece.size()); 27 } 28 29 // Create a Rust slice from a std::string_view. No UTF8 check is performed. StringViewToRustSlice(std::string_view string_piece)30inline rust::Slice<const uint8_t> StringViewToRustSlice( 31 std::string_view string_piece) { 32 return rust::Slice<const uint8_t>( 33 reinterpret_cast<const uint8_t*>(string_piece.data()), 34 string_piece.length() * sizeof(std::string_view::value_type)); 35 } 36 37 // Create a std::string_view from a Rust str. RustStrToStringView(rust::Str str)38inline std::string_view RustStrToStringView(rust::Str str) { 39 return std::string_view(str.data(), str.size()); 40 } 41 42 } // namespace base 43 44 #endif // BASE_STRINGS_STRING_VIEW_RUST_H_ 45