File indexing completed on 2024-05-19 05:44:09

0001 /*
0002     Copyright (C) 2015 Volker Krause <vkrause@kde.org>
0003 
0004     This program is free software; you can redistribute it and/or modify it
0005     under the terms of the GNU Library General Public License as published by
0006     the Free Software Foundation; either version 2 of the License, or (at your
0007     option) any later version.
0008 
0009     This program is distributed in the hope that it will be useful, but WITHOUT
0010     ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
0011     FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Library General Public
0012     License for more details.
0013 
0014     You should have received a copy of the GNU General Public License
0015     along with this program.  If not, see <https://www.gnu.org/licenses/>.
0016 */
0017 
0018 #ifndef ELFHASHSECTION_H
0019 #define ELFHASHSECTION_H
0020 
0021 #include "elfsection.h"
0022 
0023 #include <QVector>
0024 
0025 class ElfSymbolTableEntry;
0026 
0027 /** Interface for hash table sections for symbol lookup. */
0028 class ElfHashSection : public ElfSection
0029 {
0030 public:
0031     ElfHashSection(ElfFile* file, ElfSectionHeader* shdr);
0032     ~ElfHashSection();
0033 
0034     virtual uint32_t bucketCount() const = 0;
0035     virtual uint32_t chainCount() const = 0;
0036 
0037     virtual ElfSymbolTableEntry *lookup(const char* name) const = 0;
0038 
0039     /** Histogram of the hash chain lengths. */
0040     virtual QVector<uint32_t> histogram() const = 0;
0041     /** Average length of common prefixes in case of hash collisions. */
0042     virtual double averagePrefixLength() const = 0;
0043 
0044 protected:
0045     static int commonPrefixLength(const char *s1, const char *s2);
0046 };
0047 
0048 #endif // ELFHASHSECTION_H