1 files changed, 56 insertions, 0 deletions
diff --git a/gdb/dwarf-index-common.c b/gdb/dwarf-index-common.c
new file mode 100644
index 0000000..991f640
--- /dev/null
+++ b/gdb/dwarf-index-common.c
@@ -0,0 +1,56 @@
+/* Things needed for both reading and writing DWARF indices.
+
+   Copyright (C) 1994-2018 Free Software Foundation, Inc.
+
+   This file is part of GDB.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
+
+#include "defs.h"
+#include "dwarf-index-common.h"
+
+/* See dwarf-index-common.h.  */
+
+hashval_t
+mapped_index_string_hash (int index_version, const void *p)
+{
+  const unsigned char *str = (const unsigned char *) p;
+  hashval_t r = 0;
+  unsigned char c;
+
+  while ((c = *str++) != 0)
+    {
+      if (index_version >= 5)
+	c = tolower (c);
+      r = r * 67 + c - 113;
+    }
+
+  return r;
+}
+
+/* See dwarf-index-common.h.  */
+
+uint32_t
+dwarf5_djb_hash (const char *str_)
+{
+  const unsigned char *str = (const unsigned char *) str_;
+
+  /* Note: tolower here ignores UTF-8, which isn't fully compliant.
+     See http://dwarfstd.org/ShowIssue.php?issue=161027.1.  */
+
+  uint32_t hash = 5381;
+  while (int c = *str++)
+    hash = hash * 33 + tolower (c);
+  return hash;
+}