OpenSolaris Launch

1 files changed, 88 insertions, 0 deletions

diff --git a/usr/src/cmd/geniconvtbl/hash.h b/usr/src/cmd/geniconvtbl/hash.h
new file mode 100644
index 0000000000..e4cc283913
--- /dev/null
+++ b/usr/src/cmd/geniconvtbl/hash.h
@@ -0,0 +1,88 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License, Version 1.0 only
+ * (the "License").  You may not use this file except in compliance
+ * with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright (c) 1999 by Sun Microsystems, Inc.
+ * All rights reserved.
+ */
+
+#ifndef	_ICONV_TM_HASH_H
+#define	_ICONV_TM_HASH_H
+
+#pragma ident	"%Z%%M%	%I%	%E% SMI"
+
+
+#ifdef	__cplusplus
+extern "C" {
+#endif
+
+
+
+static itm_size_t	hash(const char *, itm_size_t, itm_size_t);
+static itm_num_t	hash_dense_encoding(const unsigned char *, itm_size_t,
+				    const unsigned char *,
+				    const unsigned char *);
+
+
+static itm_size_t
+hash(const char *ptr, itm_size_t size, itm_size_t hash_size)
+{
+	itm_size_t	value;
+
+	value = *(ptr++);
+	--size;
+	for (; 0 < size; --size) {
+		value *= 27239;
+		value += *(ptr++);
+	}
+	return (value % hash_size);
+}
+
+static itm_num_t
+hash_dense_encoding(
+	const unsigned char	*byte_seq,
+	itm_size_t		length,
+	const unsigned char	*byte_seq_min,
+	const unsigned char	*byte_seq_max)
+{
+	long		i;
+	itm_num_t	num;
+
+	num = (*byte_seq - *byte_seq_min);
+	byte_seq_min++;
+	byte_seq_max++;
+	for (i = 1, byte_seq++; i < length;
+	    i++, byte_seq++, byte_seq_min++, byte_seq_max++) {
+		if ((*byte_seq < *byte_seq_min) ||
+		    (*byte_seq_max < *byte_seq)) {
+			return (-1);
+		}
+		num *= (*byte_seq_max - *byte_seq_min + 1);
+		num += (*byte_seq - *byte_seq_min);
+	}
+	return (num);
+}
+
+#ifdef	__cplusplus
+}
+#endif
+
+#endif /* !_ICONV_TM_HASH_H */