| // Copyright 2024 The Abseil Authors | |
| // | |
| // Licensed under the Apache License, Version 2.0 (the "License"); | |
| // you may not use this file except in compliance with the License. | |
| // You may obtain a copy of the License at | |
| // | |
| // https://www.apache.org/licenses/LICENSE-2.0 | |
| // | |
| // Unless required by applicable law or agreed to in writing, software | |
| // distributed under the License is distributed on an "AS IS" BASIS, | |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |
| // See the License for the specific language governing permissions and | |
| // limitations under the License. | |
| namespace absl { | |
| ABSL_NAMESPACE_BEGIN | |
| namespace debugging_internal { | |
| struct DecodeRustPunycodeOptions { | |
| const char* punycode_begin; | |
| const char* punycode_end; | |
| char* out_begin; | |
| char* out_end; | |
| }; | |
| // Given Rust Punycode in `punycode_begin .. punycode_end`, writes the | |
| // corresponding UTF-8 plaintext into `out_begin .. out_end`, followed by a NUL | |
| // character, and returns a pointer to that final NUL on success. On failure | |
| // returns a null pointer, and the contents of `out_begin .. out_end` are | |
| // unspecified. | |
| // | |
| // Failure occurs in precisely these cases: | |
| // - Any input byte does not match [0-9a-zA-Z_]. | |
| // - The first input byte is an underscore, but no other underscore appears in | |
| // the input. | |
| // - The delta sequence does not represent a valid sequence of code-point | |
| // insertions. | |
| // - The plaintext would contain more than 256 code points. | |
| // | |
| // DecodeRustPunycode is async-signal-safe with bounded runtime and a small | |
| // stack footprint, making it suitable for use in demangling Rust symbol names | |
| // from a signal handler. | |
| absl::Nullable<char*> DecodeRustPunycode(DecodeRustPunycodeOptions options); | |
| } // namespace debugging_internal | |
| ABSL_NAMESPACE_END | |
| } // namespace absl | |