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6145969e3a
Summary: Move the function renaming logic into the Function class, and the MD5Hash routine into the MD5 header. This will enable these routines to be shared with ThinLTO, which will be changed to store the MD5 hash instead of full function name in the combined index for significant size reductions. And using the same function naming for locals in the function index facilitates future integration with indirect call value profiles. Reviewers: davidxl Subscribers: llvm-commits Differential Revision: http://reviews.llvm.org/D17006 llvm-svn: 260197
84 lines
2.4 KiB
C++
84 lines
2.4 KiB
C++
/*
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* This code is derived from (original license follows):
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*
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* This is an OpenSSL-compatible implementation of the RSA Data Security, Inc.
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* MD5 Message-Digest Algorithm (RFC 1321).
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*
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* Homepage:
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* http://openwall.info/wiki/people/solar/software/public-domain-source-code/md5
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*
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* Author:
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* Alexander Peslyak, better known as Solar Designer <solar at openwall.com>
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*
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* This software was written by Alexander Peslyak in 2001. No copyright is
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* claimed, and the software is hereby placed in the public domain.
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* In case this attempt to disclaim copyright and place the software in the
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* public domain is deemed null and void, then the software is
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* Copyright (c) 2001 Alexander Peslyak and it is hereby released to the
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* general public under the following terms:
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted.
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*
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* There's ABSOLUTELY NO WARRANTY, express or implied.
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*
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* See md5.c for more information.
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*/
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#ifndef LLVM_SUPPORT_MD5_H
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#define LLVM_SUPPORT_MD5_H
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#include "llvm/ADT/ArrayRef.h"
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#include "llvm/ADT/SmallString.h"
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#include "llvm/Support/DataTypes.h"
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#include "llvm/Support/Endian.h"
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namespace llvm {
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class MD5 {
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// Any 32-bit or wider unsigned integer data type will do.
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typedef uint32_t MD5_u32plus;
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MD5_u32plus a, b, c, d;
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MD5_u32plus hi, lo;
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uint8_t buffer[64];
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MD5_u32plus block[16];
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public:
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typedef uint8_t MD5Result[16];
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MD5();
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/// \brief Updates the hash for the byte stream provided.
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void update(ArrayRef<uint8_t> Data);
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/// \brief Updates the hash for the StringRef provided.
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void update(StringRef Str);
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/// \brief Finishes off the hash and puts the result in result.
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void final(MD5Result &Result);
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/// \brief Translates the bytes in \p Res to a hex string that is
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/// deposited into \p Str. The result will be of length 32.
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static void stringifyResult(MD5Result &Result, SmallString<32> &Str);
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private:
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const uint8_t *body(ArrayRef<uint8_t> Data);
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};
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/// Helper to compute and return a 64-bit MD5 Hash of a given string.
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inline uint64_t MD5Hash(StringRef Str) {
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MD5 Hash;
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Hash.update(Str);
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llvm::MD5::MD5Result Result;
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Hash.final(Result);
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// Return the least significant 8 bytes. Our MD5 implementation returns the
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// result in little endian, so we may need to swap bytes.
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using namespace llvm::support;
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return endian::read<uint64_t, little, unaligned>(Result);
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}
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}
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#endif
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