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38 lines
1.0 KiB
38 lines
1.0 KiB
//===- 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>, 2013-2014 */ |
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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 <stdint.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 += (*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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