llvm/lib/Support/ELFAttributes.cpp

   1 //===-- ELFAttributes.cpp - ELF Attributes --------------------------------===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8
   9 #include "llvm/Support/ELFAttributes.h"
  10 #include "llvm/ADT/StringRef.h"
  11
  12 using namespace llvm;
  13
  14 StringRef ELFAttrs::attrTypeAsString(unsigned attr, TagNameMap tagNameMap,
  15                                      bool hasTagPrefix) {
  16   auto tagNameIt = find_if(
  17       tagNameMap, [attr](const TagNameItem item) { return item.attr == attr; });
  18   if (tagNameIt == tagNameMap.end())
  19     return "";
  20   StringRef tagName = tagNameIt->tagName;
  21   return hasTagPrefix ? tagName : tagName.drop_front(4);
  22 }
  23
  24 std::optional<unsigned> ELFAttrs::attrTypeFromString(StringRef tag,
  25                                                      TagNameMap tagNameMap) {
  26   bool hasTagPrefix = tag.starts_with("Tag_");
  27   auto tagNameIt =
  28       find_if(tagNameMap, [tag, hasTagPrefix](const TagNameItem item) {
  29         return item.tagName.drop_front(hasTagPrefix ? 0 : 4) == tag;
  30       });
  31   if (tagNameIt == tagNameMap.end())
  32     return std::nullopt;
  33   return tagNameIt->attr;
  34 }