1 files changed, 113 insertions, 0 deletions
diff --git a/contrib/llvm-project/lldb/source/Utility/UUID.cpp b/contrib/llvm-project/lldb/source/Utility/UUID.cpp
new file mode 100644
index 000000000000..57e3a39d1f8e
--- /dev/null
+++ b/contrib/llvm-project/lldb/source/Utility/UUID.cpp
@@ -0,0 +1,113 @@
+//===-- UUID.cpp ----------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#include "lldb/Utility/UUID.h"
+
+#include "lldb/Utility/Stream.h"
+#include "llvm/ADT/StringRef.h"
+#include "llvm/Support/Format.h"
+
+#include <cctype>
+#include <cstdio>
+#include <cstring>
+
+using namespace lldb_private;
+
+// Whether to put a separator after count uuid bytes.
+// For the first 16 bytes we follow the traditional UUID format. After that, we
+// simply put a dash after every 6 bytes.
+static inline bool separate(size_t count) {
+  if (count >= 10)
+    return (count - 10) % 6 == 0;
+
+  switch (count) {
+  case 4:
+  case 6:
+  case 8:
+    return true;
+  default:
+    return false;
+  }
+}
+
+UUID::UUID(UUID::CvRecordPdb70 debug_info) {
+  llvm::sys::swapByteOrder(debug_info.Uuid.Data1);
+  llvm::sys::swapByteOrder(debug_info.Uuid.Data2);
+  llvm::sys::swapByteOrder(debug_info.Uuid.Data3);
+  llvm::sys::swapByteOrder(debug_info.Age);
+  if (debug_info.Age)
+    *this = UUID(&debug_info, sizeof(debug_info));
+  else
+    *this = UUID(&debug_info.Uuid, sizeof(debug_info.Uuid));
+}
+
+std::string UUID::GetAsString(llvm::StringRef separator) const {
+  std::string result;
+  llvm::raw_string_ostream os(result);
+
+  for (auto B : llvm::enumerate(GetBytes())) {
+    if (separate(B.index()))
+      os << separator;
+
+    os << llvm::format_hex_no_prefix(B.value(), 2, true);
+  }
+  os.flush();
+
+  return result;
+}
+
+void UUID::Dump(Stream &s) const { s.PutCString(GetAsString()); }
+
+static inline int xdigit_to_int(char ch) {
+  ch = tolower(ch);
+  if (ch >= 'a' && ch <= 'f')
+    return 10 + ch - 'a';
+  return ch - '0';
+}
+
+llvm::StringRef
+UUID::DecodeUUIDBytesFromString(llvm::StringRef p,
+                                llvm::SmallVectorImpl<uint8_t> &uuid_bytes) {
+  uuid_bytes.clear();
+  while (p.size() >= 2) {
+    if (isxdigit(p[0]) && isxdigit(p[1])) {
+      int hi_nibble = xdigit_to_int(p[0]);
+      int lo_nibble = xdigit_to_int(p[1]);
+      // Translate the two hex nibble characters into a byte
+      uuid_bytes.push_back((hi_nibble << 4) + lo_nibble);
+
+      // Skip both hex digits
+      p = p.drop_front(2);
+    } else if (p.front() == '-') {
+      // Skip dashes
+      p = p.drop_front();
+    } else {
+      // UUID values can only consist of hex characters and '-' chars
+      break;
+    }
+  }
+  return p;
+}
+
+bool UUID::SetFromStringRef(llvm::StringRef str) {
+  llvm::StringRef p = str;
+
+  // Skip leading whitespace characters
+  p = p.ltrim();
+
+  llvm::SmallVector<uint8_t, 20> bytes;
+  llvm::StringRef rest = UUID::DecodeUUIDBytesFromString(p, bytes);
+
+  // Return false if we could not consume the entire string or if the parsed
+  // UUID is empty.
+  if (!rest.empty() || bytes.empty())
+    return false;
+
+  *this = UUID(bytes);
+  return true;
+}