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Diffstat (limited to 'capstone/LEB128.h')
| -rw-r--r-- | capstone/LEB128.h | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/capstone/LEB128.h b/capstone/LEB128.h new file mode 100644 index 000000000..10329fdc9 --- /dev/null +++ b/capstone/LEB128.h @@ -0,0 +1,38 @@ +//===- llvm/Support/LEB128.h - [SU]LEB128 utility functions -----*- C++ -*-===// +// +// The LLVM Compiler Infrastructure +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// +// +// This file declares some utility functions for encoding SLEB128 and +// ULEB128 values. +// +//===----------------------------------------------------------------------===// + +/* Capstone Disassembly Engine */ +/* By Nguyen Anh Quynh <aquynh@gmail.com>, 2013-2019 */ + +#ifndef CS_LLVM_SUPPORT_LEB128_H +#define CS_LLVM_SUPPORT_LEB128_H + +#include "include/capstone/capstone.h" + +/// Utility function to decode a ULEB128 value. +static inline uint64_t decodeULEB128(const uint8_t *p, unsigned *n) +{ + const uint8_t *orig_p = p; + uint64_t Value = 0; + unsigned Shift = 0; + do { + Value += (uint64_t)(*p & 0x7f) << Shift; + Shift += 7; + } while (*p++ >= 128); + if (n) + *n = (unsigned)(p - orig_p); + return Value; +} + +#endif // LLVM_SYSTEM_LEB128_H |