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| Rev | Author | Line No. | Line |
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| 14 | pmbaty | 1 | //===- SmallVectorMemoryBuffer.h --------------------------------*- C++ -*-===// |
| 2 | // |
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| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
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| 4 | // See https://llvm.org/LICENSE.txt for license information. |
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| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
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| 6 | // |
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| 7 | //===----------------------------------------------------------------------===// |
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| 8 | // |
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| 9 | // This file declares a wrapper class to hold the memory into which an |
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| 10 | // object will be generated. |
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| 11 | // |
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| 12 | //===----------------------------------------------------------------------===// |
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| 13 | |||
| 14 | #ifndef LLVM_SUPPORT_SMALLVECTORMEMORYBUFFER_H |
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| 15 | #define LLVM_SUPPORT_SMALLVECTORMEMORYBUFFER_H |
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| 16 | |||
| 17 | #include "llvm/ADT/SmallVector.h" |
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| 18 | #include "llvm/Support/MemoryBuffer.h" |
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| 19 | #include "llvm/Support/raw_ostream.h" |
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| 20 | |||
| 21 | namespace llvm { |
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| 22 | |||
| 23 | /// SmallVector-backed MemoryBuffer instance. |
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| 24 | /// |
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| 25 | /// This class enables efficient construction of MemoryBuffers from SmallVector |
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| 26 | /// instances. This is useful for MCJIT and Orc, where object files are streamed |
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| 27 | /// into SmallVectors, then inspected using ObjectFile (which takes a |
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| 28 | /// MemoryBuffer). |
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| 29 | class SmallVectorMemoryBuffer : public MemoryBuffer { |
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| 30 | public: |
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| 31 | /// Construct a SmallVectorMemoryBuffer from the given SmallVector r-value. |
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| 32 | SmallVectorMemoryBuffer(SmallVectorImpl<char> &&SV, |
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| 33 | bool RequiresNullTerminator = true) |
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| 34 | : SmallVectorMemoryBuffer(std::move(SV), "<in-memory object>", |
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| 35 | RequiresNullTerminator) {} |
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| 36 | |||
| 37 | /// Construct a named SmallVectorMemoryBuffer from the given SmallVector |
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| 38 | /// r-value and StringRef. |
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| 39 | SmallVectorMemoryBuffer(SmallVectorImpl<char> &&SV, StringRef Name, |
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| 40 | bool RequiresNullTerminator = true) |
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| 41 | : SV(std::move(SV)), BufferName(std::string(Name)) { |
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| 42 | if (RequiresNullTerminator) { |
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| 43 | this->SV.push_back('\0'); |
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| 44 | this->SV.pop_back(); |
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| 45 | } |
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| 46 | init(this->SV.begin(), this->SV.end(), false); |
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| 47 | } |
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| 48 | |||
| 49 | // Key function. |
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| 50 | ~SmallVectorMemoryBuffer() override; |
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| 51 | |||
| 52 | StringRef getBufferIdentifier() const override { return BufferName; } |
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| 53 | |||
| 54 | BufferKind getBufferKind() const override { return MemoryBuffer_Malloc; } |
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| 55 | |||
| 56 | private: |
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| 57 | SmallVector<char, 0> SV; |
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| 58 | std::string BufferName; |
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| 59 | }; |
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| 60 | |||
| 61 | } // namespace llvm |
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| 62 | |||
| 63 | #endif |