mirror of
https://github.com/protocolbuffers/protobuf
synced 2026-08-26 02:23:14 -04:00
5695a882bd
Putting it into BUILD files unintentionally forces it on all our downstream users. Instead, we just want to enable this during testing and let them choose for themselves in their builds. Note, that this expands the scope of -Werror to our entire repo for CI, so a bunch of fixes and opt-outs had to be applied to get this change passing. Closed #14714 PiperOrigin-RevId: 666903224
60 lines
1.7 KiB
C++
60 lines
1.7 KiB
C++
// Protocol Buffers - Google's data interchange format
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// Copyright 2024 Google LLC. All rights reserved.
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//
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file or at
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// https://developers.google.com/open-source/licenses/bsd
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#ifndef GOOGLE_PROTOBUF_RUST_CPP_KERNEL_STRINGS_H__
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#define GOOGLE_PROTOBUF_RUST_CPP_KERNEL_STRINGS_H__
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#include <cstddef>
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#include <cstring>
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#include <string>
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namespace google {
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namespace protobuf {
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namespace rust {
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// Represents an ABI-stable version of &[u8]/string_view (borrowed slice of
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// bytes) for FFI use only.
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struct PtrAndLen {
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/// Borrows the memory.
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const char* ptr;
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size_t len;
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};
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// Represents an owned string for FFI purposes.
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//
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// This must only be used to transfer a string from C++ to Rust. The
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// below invariants must hold:
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// * Rust and C++ versions of this struct are ABI compatible.
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// * The data were allocated using the Rust allocator and are 1 byte aligned.
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// * The data is valid UTF-8.
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struct RustStringRawParts {
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// Owns the memory.
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const char* data;
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size_t len;
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RustStringRawParts() = delete;
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// Copies src.
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explicit RustStringRawParts(std::string src);
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};
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} // namespace rust
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} // namespace protobuf
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} // namespace google
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extern "C" {
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// Allocates a new std::string on the C++ heap and returns a pointer to it.
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std::string* proto2_rust_cpp_new_string(google::protobuf::rust::PtrAndLen src);
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// Deletes a std::string object from the C++ heap.
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void proto2_rust_cpp_delete_string(std::string* str);
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// Obtain a PtrAndLen, the FFI-safe view type, from a std::string.
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google::protobuf::rust::PtrAndLen proto2_rust_cpp_string_to_view(std::string* str);
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}
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#endif // GOOGLE_PROTOBUF_RUST_CPP_KERNEL_STRINGS_H__
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