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38 lines
1.1 KiB
C++
38 lines
1.1 KiB
C++
//===- llvm/Support/LEB128.h - [SU]LEB128 utility functions -----*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file declares some utility functions for encoding SLEB128 and
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// ULEB128 values.
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//
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//===----------------------------------------------------------------------===//
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/* Capstone Disassembly Engine */
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/* By Nguyen Anh Quynh <aquynh@gmail.com>, 2013-2019 */
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#ifndef CS_LLVM_SUPPORT_LEB128_H
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#define CS_LLVM_SUPPORT_LEB128_H
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#include "include/capstone/capstone.h"
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/// Utility function to decode a ULEB128 value.
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static inline uint64_t decodeULEB128(const uint8_t *p, unsigned *n)
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{
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const uint8_t *orig_p = p;
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uint64_t Value = 0;
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unsigned Shift = 0;
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do {
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Value += (uint64_t)(*p & 0x7f) << Shift;
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Shift += 7;
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} while (*p++ >= 128);
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if (n)
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*n = (unsigned)(p - orig_p);
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return Value;
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}
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#endif // LLVM_SYSTEM_LEB128_H
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