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diff --git a/src/utf32_le.c b/src/utf32_le.c
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+/**********************************************************************
+ utf32_le.c - Oniguruma (regular expression library)
+**********************************************************************/
+/*-
+ * Copyright (c) 2002-2016 K.Kosako <sndgk393 AT ybb DOT ne DOT jp>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include "regenc.h"
+
+static int
+utf32le_mbc_enc_len(const UChar* p ARG_UNUSED)
+{
+ return 4;
+}
+
+static int
+utf32le_is_mbc_newline(const UChar* p, const UChar* end)
+{
+ if (p + 3 < end) {
+ if (*p == 0x0a && *(p+1) == 0 && *(p+2) == 0 && *(p+3) == 0)
+ return 1;
+#ifdef USE_UNICODE_ALL_LINE_TERMINATORS
+ if ((
+#ifndef USE_CRNL_AS_LINE_TERMINATOR
+ *p == 0x0d ||
+#endif
+ *p == 0x85)
+ && *(p+1) == 0x00 && (p+2) == 0x00 && *(p+3) == 0x00)
+ return 1;
+
+ if (*(p+1) == 0x20 && (*p == 0x29 || *p == 0x28)
+ && *(p+2) == 0x00 && *(p+3) == 0x00)
+ return 1;
+#endif
+ }
+ return 0;
+}
+
+static OnigCodePoint
+utf32le_mbc_to_code(const UChar* p, const UChar* end ARG_UNUSED)
+{
+ return (OnigCodePoint )(((p[3] * 256 + p[2]) * 256 + p[1]) * 256 + p[0]);
+}
+
+static int
+utf32le_code_to_mbclen(OnigCodePoint code ARG_UNUSED)
+{
+ return 4;
+}
+
+static int
+utf32le_code_to_mbc(OnigCodePoint code, UChar *buf)
+{
+ UChar* p = buf;
+
+ *p++ = (UChar ) (code & 0xff);
+ *p++ = (UChar )((code & 0xff00) >> 8);
+ *p++ = (UChar )((code & 0xff0000) >>16);
+ *p++ = (UChar )((code & 0xff000000) >>24);
+ return 4;
+}
+
+static int
+utf32le_mbc_case_fold(OnigCaseFoldType flag,
+ const UChar** pp, const UChar* end, UChar* fold)
+{
+ const UChar* p = *pp;
+
+ if (ONIGENC_IS_ASCII_CODE(*p) && *(p+1) == 0 && *(p+2) == 0 && *(p+3) == 0) {
+#ifdef USE_UNICODE_CASE_FOLD_TURKISH_AZERI
+ if ((flag & ONIGENC_CASE_FOLD_TURKISH_AZERI) != 0) {
+ if (*p == 0x49) {
+ *fold++ = 0x31;
+ *fold++ = 0x01;
+ }
+ }
+ else {
+#endif
+ *fold++ = ONIGENC_ASCII_CODE_TO_LOWER_CASE(*p);
+ *fold++ = 0;
+#ifdef USE_UNICODE_CASE_FOLD_TURKISH_AZERI
+ }
+#endif
+
+ *fold++ = 0;
+ *fold = 0;
+ *pp += 4;
+ return 4;
+ }
+ else
+ return onigenc_unicode_mbc_case_fold(ONIG_ENCODING_UTF32_LE, flag, pp, end,
+ fold);
+}
+
+#if 0
+static int
+utf32le_is_mbc_ambiguous(OnigCaseFoldType flag, const UChar** pp, const UChar* end)
+{
+ const UChar* p = *pp;
+
+ (*pp) += 4;
+
+ if (*(p+1) == 0 && *(p+2) == 0 && *(p+3) == 0) {
+ int c, v;
+
+ if (*p == 0xdf && (flag & INTERNAL_ONIGENC_CASE_FOLD_MULTI_CHAR) != 0) {
+ return TRUE;
+ }
+
+ c = *p;
+ v = ONIGENC_IS_UNICODE_ISO_8859_1_BIT_CTYPE(c,
+ (BIT_CTYPE_UPPER | BIT_CTYPE_LOWER));
+ if ((v | BIT_CTYPE_LOWER) != 0) {
+ /* 0xaa, 0xb5, 0xba are lower case letter, but can't convert. */
+ if (c >= 0xaa && c <= 0xba)
+ return FALSE;
+ else
+ return TRUE;
+ }
+ return (v != 0 ? TRUE : FALSE);
+ }
+
+ return FALSE;
+}
+#endif
+
+static UChar*
+utf32le_left_adjust_char_head(const UChar* start, const UChar* s)
+{
+ int rem;
+
+ if (s <= start) return (UChar* )s;
+
+ rem = (s - start) % 4;
+ return (UChar* )(s - rem);
+}
+
+static int
+utf32le_get_case_fold_codes_by_str(OnigCaseFoldType flag,
+ const OnigUChar* p, const OnigUChar* end, OnigCaseFoldCodeItem items[])
+{
+ return onigenc_unicode_get_case_fold_codes_by_str(ONIG_ENCODING_UTF32_LE,
+ flag, p, end, items);
+}
+
+OnigEncodingType OnigEncodingUTF32_LE = {
+ utf32le_mbc_enc_len,
+ "UTF-32LE", /* name */
+ 4, /* max byte length */
+ 4, /* min byte length */
+ utf32le_is_mbc_newline,
+ utf32le_mbc_to_code,
+ utf32le_code_to_mbclen,
+ utf32le_code_to_mbc,
+ utf32le_mbc_case_fold,
+ onigenc_unicode_apply_all_case_fold,
+ utf32le_get_case_fold_codes_by_str,
+ onigenc_unicode_property_name_to_ctype,
+ onigenc_unicode_is_code_ctype,
+ onigenc_utf16_32_get_ctype_code_range,
+ utf32le_left_adjust_char_head,
+ onigenc_always_false_is_allowed_reverse_match,
+ NULL, /* init */
+ NULL /* is_initialized */
+};