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thirdparty/capstone/LEB128.h

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+//===- 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