109 lines
3.0 KiB
C++
109 lines
3.0 KiB
C++
//===- CXString.h - Routines for manipulating CXStrings -------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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// This file defines routines for manipulating CXStrings.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_CLANG_TOOLS_LIBCLANG_CXSTRING_H
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#define LLVM_CLANG_TOOLS_LIBCLANG_CXSTRING_H
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#include "clang-c/Index.h"
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#include "clang/Basic/LLVM.h"
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#include "llvm/ADT/SmallString.h"
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#include "llvm/ADT/StringRef.h"
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#include "llvm/Support/Compiler.h"
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#include <string>
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#include <vector>
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namespace clang {
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namespace cxstring {
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struct CXStringBuf;
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/// Create a CXString object for an empty "" string.
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CXString createEmpty();
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/// Create a CXString object for an NULL string.
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///
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/// A NULL string should be used as an "invalid" value in case of errors.
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CXString createNull();
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/// Create a CXString object from a nul-terminated C string. New
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/// CXString may contain a pointer to \p String.
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///
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/// \p String should not be changed by the caller afterwards.
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CXString createRef(const char *String);
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/// Create a CXString object from a nul-terminated C string. New
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/// CXString will contain a copy of \p String.
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///
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/// \p String can be changed or freed by the caller.
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CXString createDup(const char *String);
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/// Create a CXString object from a StringRef. New CXString may
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/// contain a pointer to the undrelying data of \p String.
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///
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/// \p String should not be changed by the caller afterwards.
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CXString createRef(StringRef String);
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/// Create a CXString object from a StringRef. New CXString will
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/// contain a copy of \p String.
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///
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/// \p String can be changed or freed by the caller.
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CXString createDup(StringRef String);
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// Usually std::string is intended to be used as backing storage for CXString.
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// In this case, call \c createRef(String.c_str()).
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//
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// If you need to make a copy, call \c createDup(StringRef(String)).
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CXString createRef(std::string String) = delete;
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/// Create a CXString object that is backed by a string buffer.
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CXString createCXString(CXStringBuf *buf);
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CXStringSet *createSet(const std::vector<std::string> &Strings);
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/// A string pool used for fast allocation/deallocation of strings.
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class CXStringPool {
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public:
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~CXStringPool();
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CXStringBuf *getCXStringBuf(CXTranslationUnit TU);
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private:
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std::vector<CXStringBuf *> Pool;
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friend struct CXStringBuf;
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};
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struct CXStringBuf {
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SmallString<128> Data;
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CXTranslationUnit TU;
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CXStringBuf(CXTranslationUnit TU) : TU(TU) {}
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/// Return this buffer to the pool.
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void dispose();
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};
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CXStringBuf *getCXStringBuf(CXTranslationUnit TU);
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/// Returns true if the CXString data is managed by a pool.
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bool isManagedByPool(CXString str);
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}
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static inline StringRef getContents(const CXUnsavedFile &UF) {
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return StringRef(UF.Contents, UF.Length);
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}
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}
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#endif
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