1 //===-- StringTableBuilder.cpp - String table building utility ------------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 #include "llvm/MC/StringTableBuilder.h"
11 #include "llvm/ADT/SmallVector.h"
15 static bool compareBySuffix(StringRef a, StringRef b) {
16 size_t sizeA = a.size();
17 size_t sizeB = b.size();
18 size_t len = std::min(sizeA, sizeB);
19 for (size_t i = 0; i < len; ++i) {
20 char ca = a[sizeA - i - 1];
21 char cb = b[sizeB - i - 1];
28 void StringTableBuilder::finalize() {
29 SmallVector<StringRef, 8> Strings;
30 for (auto i = StringIndexMap.begin(), e = StringIndexMap.end(); i != e; ++i)
31 Strings.push_back(i->getKey());
33 std::sort(Strings.begin(), Strings.end(), compareBySuffix);
35 // FIXME: Starting with a null byte is ELF specific. Generalize this so we
36 // can use the class with other object formats.
37 StringTable += '\x00';
40 for (StringRef s : Strings) {
41 if (Previous.endswith(s)) {
42 StringIndexMap[s] = StringTable.size() - 1 - s.size();
46 StringIndexMap[s] = StringTable.size();
48 StringTable += '\x00';