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- /*
- * Copyright 2014-present Facebook, Inc.
- *
- * 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
- *
- * http://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.
- */
- #pragma once
- #include <folly/FBString.h>
- namespace folly {
- /**
- * Return the demangled (prettyfied) version of a C++ type.
- *
- * This function tries to produce a human-readable type, but the type name will
- * be returned unchanged in case of error or if demangling isn't supported on
- * your system.
- *
- * Use for debugging -- do not rely on demangle() returning anything useful.
- *
- * This function may allocate memory (and therefore throw std::bad_alloc).
- */
- fbstring demangle(const char* name);
- inline fbstring demangle(const std::type_info& type) {
- return demangle(type.name());
- }
- /**
- * Return the demangled (prettyfied) version of a C++ type in a user-provided
- * buffer.
- *
- * The semantics are the same as for snprintf or strlcpy: bufSize is the size
- * of the buffer, the string is always null-terminated, and the return value is
- * the number of characters (not including the null terminator) that would have
- * been written if the buffer was big enough. (So a return value >= bufSize
- * indicates that the output was truncated)
- *
- * This function does not allocate memory and is async-signal-safe.
- *
- * Note that the underlying function for the fbstring-returning demangle is
- * somewhat standard (abi::__cxa_demangle, which uses malloc), the underlying
- * function for this version is less so (cplus_demangle_v3_callback from
- * libiberty), so it is possible for the fbstring version to work, while this
- * version returns the original, mangled name.
- */
- size_t demangle(const char* name, char* buf, size_t bufSize);
- inline size_t demangle(const std::type_info& type, char* buf, size_t bufSize) {
- return demangle(type.name(), buf, bufSize);
- }
- // glibc doesn't have strlcpy
- size_t strlcpy(char* dest, const char* const src, size_t size);
- } // namespace folly
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