1 files changed, 37 insertions, 0 deletions
diff --git a/src/libs/libbib/common.cpp b/src/libs/libbib/common.cpp
new file mode 100644
index 0000000..05accd8
--- /dev/null
+++ b/src/libs/libbib/common.cpp
@@ -0,0 +1,37 @@
+/* Copyright (C) 1989-2020 Free Software Foundation, Inc.
+     Written by James Clark (jjc@jclark.com)
+
+This file is part of groff.
+
+groff 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.
+
+groff 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/>. */
+
+unsigned hash(const char *s, int len)
+{
+#if 0
+  unsigned h = 0, g;
+  while (*s != '\0') {
+    h <<= 4;
+    h += *s++;
+    if ((g = h & 0xf0000000) != 0) {
+      h ^= g >> 24;
+      h ^= g;
+    }
+  }
+#endif
+  unsigned h = 0;
+  while (--len >= 0)
+    h = *s++ + 65587*h;
+  return h;
+}
+