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to reflect the new license. We understand that people may be surprised that we're moving the header entirely to discuss the new license. We checked this carefully with the Foundation's lawyer and we believe this is the correct approach. Essentially, all code in the project is now made available by the LLVM project under our new license, so you will see that the license headers include that license only. Some of our contributors have contributed code under our old license, and accordingly, we have retained a copy of our old license notice in the top-level files in each project and repository. llvm-svn: 351636
44 lines
1.2 KiB
C++
44 lines
1.2 KiB
C++
//===- LEB128.cpp - LEB128 utility functions implementation -----*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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// This file implements 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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#include "llvm/Support/LEB128.h"
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namespace llvm {
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/// Utility function to get the size of the ULEB128-encoded value.
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unsigned getULEB128Size(uint64_t Value) {
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unsigned Size = 0;
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do {
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Value >>= 7;
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Size += sizeof(int8_t);
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} while (Value);
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return Size;
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}
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/// Utility function to get the size of the SLEB128-encoded value.
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unsigned getSLEB128Size(int64_t Value) {
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unsigned Size = 0;
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int Sign = Value >> (8 * sizeof(Value) - 1);
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bool IsMore;
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do {
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unsigned Byte = Value & 0x7f;
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Value >>= 7;
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IsMore = Value != Sign || ((Byte ^ Sign) & 0x40) != 0;
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Size += sizeof(int8_t);
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} while (IsMore);
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return Size;
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}
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} // namespace llvm
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