* enc/utf{16,32}_{be,le}.c: imported from Oniguruma 5.9.1.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@14945 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

4 files changed, 861 insertions, 0 deletions

diff --git a/enc/utf16_be.c b/enc/utf16_be.c
new file mode 100644
index 0000000000..5d98151706
--- /dev/null
+++ b/enc/utf16_be.c
@@ -0,0 +1,237 @@
+/**********************************************************************
+  utf16_be.c -  Oniguruma (regular expression library)
+**********************************************************************/
+/*-
+ * Copyright (c) 2002-2007  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"
+
+#define UTF16_IS_SURROGATE_FIRST(c)    (c >= 0xd8 && c <= 0xdb)
+#define UTF16_IS_SURROGATE_SECOND(c)   (c >= 0xdc && c <= 0xdf)
+
+static const int EncLen_UTF16[] = {
+  2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
+  2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
+  2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
+  2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
+  2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
+  2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
+  2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
+  2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
+  2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
+  2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
+  2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
+  2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
+  2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
+  2, 2, 2, 2, 2, 2, 2, 2, 4, 4, 4, 4, 2, 2, 2, 2,
+  2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
+  2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2
+};
+
+static int
+utf16be_mbc_enc_len(const UChar* p, const OnigUChar* e ARG_UNUSED,
+		    struct OnigEncodingTypeST* enc ARG_UNUSED)
+{
+  return EncLen_UTF16[*p];
+}
+
+static int
+utf16be_is_mbc_newline(const UChar* p, const UChar* end,
+		       struct OnigEncodingTypeST* enc ARG_UNUSED)
+{
+  if (p + 1 < end) {
+    if (*(p+1) == 0x0a && *p == 0x00)
+      return 1;
+#ifdef USE_UNICODE_ALL_LINE_TERMINATORS
+    if ((
+#ifndef USE_CRNL_AS_LINE_TERMINATOR
+	 *(p+1) == 0x0d ||
+#endif
+	 *(p+1) == 0x85) && *p == 0x00)
+      return 1;
+    if (*p == 0x20 && (*(p+1) == 0x29 || *(p+1) == 0x28))
+      return 1;
+#endif
+  }
+  return 0;
+}
+
+static OnigCodePoint
+utf16be_mbc_to_code(const UChar* p, const UChar* end ARG_UNUSED,
+		    struct OnigEncodingTypeST* enc ARG_UNUSED)
+{
+  OnigCodePoint code;
+
+  if (UTF16_IS_SURROGATE_FIRST(*p)) {
+    code = ((((p[0] - 0xd8) << 2) + ((p[1] & 0xc0) >> 6) + 1) << 16)
+         + ((((p[1] & 0x3f) << 2) + (p[2] - 0xdc)) << 8)
+         + p[3];
+  }
+  else {
+    code = p[0] * 256 + p[1];
+  }
+  return code;
+}
+
+static int
+utf16be_code_to_mbclen(OnigCodePoint code,
+		       struct OnigEncodingTypeST* enc ARG_UNUSED)
+{
+  return (code > 0xffff ? 4 : 2);
+}
+
+static int
+utf16be_code_to_mbc(OnigCodePoint code, UChar *buf,
+		    struct OnigEncodingTypeST* enc ARG_UNUSED)
+{
+  UChar* p = buf;
+
+  if (code > 0xffff) {
+    unsigned int plane, high;
+
+    plane = code >> 16;
+    *p++ = (plane >> 2) + 0xd8;
+    high = (code & 0xff00) >> 8;
+    *p++ = ((plane & 0x03) << 6) + (high >> 2);
+    *p++ = (high & 0x02) + 0xdc;
+    *p   = (UChar )(code & 0xff);
+    return 4;
+  }
+  else {
+    *p++ = (UChar )((code & 0xff00) >> 8);
+    *p++ = (UChar )(code & 0xff);
+    return 2;
+  }
+}
+
+static int
+utf16be_mbc_case_fold(OnigCaseFoldType flag,
+		      const UChar** pp, const UChar* end, UChar* fold,
+		      struct OnigEncodingTypeST* enc ARG_UNUSED)
+{
+  const UChar* p = *pp;
+
+  if (ONIGENC_IS_ASCII_CODE(*(p+1)) && *p == 0) {
+    p++;
+#ifdef USE_UNICODE_CASE_FOLD_TURKISH_AZERI
+    if ((flag & ONIGENC_CASE_FOLD_TURKISH_AZERI) != 0) {
+      if (*p == 0x49) {
+	*fold++ = 0x01;
+	*fold   = 0x31;
+	(*pp) += 2;
+	return 2;
+      }
+    }
+#endif
+
+    *fold++ = 0;
+    *fold   = ONIGENC_ASCII_CODE_TO_LOWER_CASE(*p);
+    *pp += 2;
+    return 2;
+  }
+  else
+    return onigenc_unicode_mbc_case_fold(ONIG_ENCODING_UTF16_BE, flag,
+					 pp, end, fold);
+}
+
+#if 0
+static int
+utf16be_is_mbc_ambiguous(OnigCaseFoldType flag, const UChar** pp, const UChar* end)
+{
+  const UChar* p = *pp;
+
+  (*pp) += EncLen_UTF16[*p];
+
+  if (*p == 0) {
+    int c, v;
+
+    p++;
+    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*
+utf16be_left_adjust_char_head(const UChar* start, const UChar* s,
+			      struct OnigEncodingTypeST* enc ARG_UNUSED)
+{
+  if (s <= start) return (UChar* )s;
+
+  if ((s - start) % 2 == 1) {
+    s--;
+  }
+
+  if (UTF16_IS_SURROGATE_SECOND(*s) && s > start + 1)
+    s -= 2;
+
+  return (UChar* )s;
+}
+
+static int
+utf16be_get_case_fold_codes_by_str(OnigCaseFoldType flag,
+				   const OnigUChar* p, const OnigUChar* end,
+				   OnigCaseFoldCodeItem items[],
+				   struct OnigEncodingTypeST* enc ARG_UNUSED)
+{
+  return onigenc_unicode_get_case_fold_codes_by_str(ONIG_ENCODING_UTF16_BE,
+						    flag, p, end, items);
+}
+
+OnigEncodingType OnigEncodingUTF16_BE = {
+  utf16be_mbc_enc_len,
+  "UTF-16BE",   /* name */
+  4,            /* max byte length */
+  2,            /* min byte length */
+  utf16be_is_mbc_newline,
+  utf16be_mbc_to_code,
+  utf16be_code_to_mbclen,
+  utf16be_code_to_mbc,
+  utf16be_mbc_case_fold,
+  onigenc_unicode_apply_all_case_fold,
+  utf16be_get_case_fold_codes_by_str,
+  onigenc_unicode_property_name_to_ctype,
+  onigenc_unicode_is_code_ctype,
+  onigenc_utf16_32_get_ctype_code_range,
+  utf16be_left_adjust_char_head,
+  onigenc_always_false_is_allowed_reverse_match
+};
diff --git a/enc/utf16_le.c b/enc/utf16_le.c
new file mode 100644
index 0000000000..7b50b8481a
--- /dev/null
+++ b/enc/utf16_le.c
@@ -0,0 +1,238 @@
+/**********************************************************************
+  utf16_le.c -  Oniguruma (regular expression library)
+**********************************************************************/
+/*-
+ * Copyright (c) 2002-2007  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"
+
+#define UTF16_IS_SURROGATE_FIRST(c)    (c >= 0xd8 && c <= 0xdb)
+#define UTF16_IS_SURROGATE_SECOND(c)   (c >= 0xdc && c <= 0xdf)
+
+static const int EncLen_UTF16[] = {
+  2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
+  2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
+  2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
+  2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
+  2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
+  2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
+  2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
+  2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
+  2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
+  2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
+  2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
+  2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
+  2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
+  2, 2, 2, 2, 2, 2, 2, 2, 4, 4, 4, 4, 2, 2, 2, 2,
+  2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
+  2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2
+};
+
+static int
+utf16le_mbc_enc_len(const UChar* p, const OnigUChar* e ARG_UNUSED,
+		    struct OnigEncodingTypeST* enc ARG_UNUSED)
+{
+  return EncLen_UTF16[*(p+1)];
+}
+
+static int
+utf16le_is_mbc_newline(const UChar* p, const UChar* end,
+		       struct OnigEncodingTypeST* enc ARG_UNUSED)
+{
+  if (p + 1 < end) {
+    if (*p == 0x0a && *(p+1) == 0x00)
+      return 1;
+#ifdef USE_UNICODE_ALL_LINE_TERMINATORS
+    if ((
+#ifndef USE_CRNL_AS_LINE_TERMINATOR
+	 *p == 0x0d ||
+#endif
+	 *p == 0x85) && *(p+1) == 0x00)
+      return 1;
+    if (*(p+1) == 0x20 && (*p == 0x29 || *p == 0x28))
+      return 1;
+#endif
+  }
+  return 0;
+}
+
+static OnigCodePoint
+utf16le_mbc_to_code(const UChar* p, const UChar* end ARG_UNUSED,
+		    struct OnigEncodingTypeST* enc ARG_UNUSED)
+{
+  OnigCodePoint code;
+  UChar c0 = *p;
+  UChar c1 = *(p+1);
+
+  if (UTF16_IS_SURROGATE_FIRST(c1)) {
+    code = ((((c1 - 0xd8) << 2) + ((c0  & 0xc0) >> 6) + 1) << 16)
+         + ((((c0 & 0x3f) << 2) + (p[3] - 0xdc)) << 8)
+         + p[2];
+  }
+  else {
+    code = c1 * 256 + p[0];
+  }
+  return code;
+}
+
+static int
+utf16le_code_to_mbclen(OnigCodePoint code,
+		       struct OnigEncodingTypeST* enc ARG_UNUSED)
+{
+  return (code > 0xffff ? 4 : 2);
+}
+
+static int
+utf16le_code_to_mbc(OnigCodePoint code, UChar *buf,
+		    struct OnigEncodingTypeST* enc ARG_UNUSED)
+{
+  UChar* p = buf;
+
+  if (code > 0xffff) {
+    unsigned int plane, high;
+
+    plane = code >> 16;
+    high = (code & 0xff00) >> 8;
+
+    *p++ = ((plane & 0x03) << 6) + (high >> 2);
+    *p++ = (plane >> 2) + 0xd8;
+    *p++ = (UChar )(code & 0xff);
+    *p   = (high & 0x02) + 0xdc;
+    return 4;
+  }
+  else {
+    *p++ = (UChar )(code & 0xff);
+    *p++ = (UChar )((code & 0xff00) >> 8);
+    return 2;
+  }
+}
+
+static int
+utf16le_mbc_case_fold(OnigCaseFoldType flag,
+		      const UChar** pp, const UChar* end, UChar* fold,
+		      struct OnigEncodingTypeST* enc ARG_UNUSED)
+{
+  const UChar* p = *pp;
+
+  if (ONIGENC_IS_ASCII_CODE(*p) && *(p+1) == 0) {
+#ifdef USE_UNICODE_CASE_FOLD_TURKISH_AZERI
+    if ((flag & ONIGENC_CASE_FOLD_TURKISH_AZERI) != 0) {
+      if (*p == 0x49) {
+	*fold++ = 0x31;
+	*fold   = 0x01;
+	(*pp) += 2;
+	return 2;
+      }
+    }
+#endif
+
+    *fold++ = ONIGENC_ASCII_CODE_TO_LOWER_CASE(*p);
+    *fold   = 0;
+    *pp += 2;
+    return 2;
+  }
+  else
+    return onigenc_unicode_mbc_case_fold(ONIG_ENCODING_UTF16_LE, flag, pp, end,
+					 fold);
+}
+
+#if 0
+static int
+utf16le_is_mbc_ambiguous(OnigCaseFoldType flag, const UChar** pp,
+			 const UChar* end)
+{
+  const UChar* p = *pp;
+
+  (*pp) += EncLen_UTF16[*(p+1)];
+
+  if (*(p+1) == 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*
+utf16le_left_adjust_char_head(const UChar* start, const UChar* s,
+			      struct OnigEncodingTypeST* enc ARG_UNUSED)
+{
+  if (s <= start) return (UChar* )s;
+
+  if ((s - start) % 2 == 1) {
+    s--;
+  }
+
+  if (UTF16_IS_SURROGATE_SECOND(*(s+1)) && s > start + 1)
+    s -= 2;
+
+  return (UChar* )s;
+}
+
+static int
+utf16le_get_case_fold_codes_by_str(OnigCaseFoldType flag,
+				   const OnigUChar* p, const OnigUChar* end,
+				   OnigCaseFoldCodeItem items[],
+				   struct OnigEncodingTypeST* enc ARG_UNUSED)
+{
+  return onigenc_unicode_get_case_fold_codes_by_str(ONIG_ENCODING_UTF16_LE,
+						    flag, p, end, items);
+}
+
+OnigEncodingType OnigEncodingUTF16_LE = {
+  utf16le_mbc_enc_len,
+  "UTF-16LE",   /* name */
+  4,            /* max byte length */
+  2,            /* min byte length */
+  utf16le_is_mbc_newline,
+  utf16le_mbc_to_code,
+  utf16le_code_to_mbclen,
+  utf16le_code_to_mbc,
+  utf16le_mbc_case_fold,
+  onigenc_unicode_apply_all_case_fold,
+  utf16le_get_case_fold_codes_by_str,
+  onigenc_unicode_property_name_to_ctype,
+  onigenc_unicode_is_code_ctype,
+  onigenc_utf16_32_get_ctype_code_range,
+  utf16le_left_adjust_char_head,
+  onigenc_always_false_is_allowed_reverse_match
+};
diff --git a/enc/utf32_be.c b/enc/utf32_be.c
new file mode 100644
index 0000000000..7ebf1a2eaf
--- /dev/null
+++ b/enc/utf32_be.c
@@ -0,0 +1,193 @@
+/**********************************************************************
+  utf32_be.c -  Oniguruma (regular expression library)
+**********************************************************************/
+/*-
+ * Copyright (c) 2002-2007  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
+utf32be_mbc_enc_len(const UChar* p ARG_UNUSED, const OnigUChar* e ARG_UNUSED,
+		    struct OnigEncodingTypeST* enc ARG_UNUSED)
+{
+  return 4;
+}
+
+static int
+utf32be_is_mbc_newline(const UChar* p, const UChar* end,
+		       struct OnigEncodingTypeST* enc ARG_UNUSED)
+{
+  if (p + 3 < end) {
+    if (*(p+3) == 0x0a && *(p+2) == 0 && *(p+1) == 0 && *p == 0)
+      return 1;
+#ifdef USE_UNICODE_ALL_LINE_TERMINATORS
+    if ((
+#ifndef USE_CRNL_AS_LINE_TERMINATOR
+	 *(p+3) == 0x0d ||
+#endif
+	 *(p+3) == 0x85)
+	&& *(p+2) == 0 && *(p+1) == 0 && *p == 0x00)
+      return 1;
+    if (*(p+2) == 0x20 && (*(p+3) == 0x29 || *(p+3) == 0x28)
+	&& *(p+1) == 0 && *p == 0)
+      return 1;
+#endif
+  }
+  return 0;
+}
+
+static OnigCodePoint
+utf32be_mbc_to_code(const UChar* p, const UChar* end ARG_UNUSED,
+		    struct OnigEncodingTypeST* enc ARG_UNUSED)
+{
+  return (OnigCodePoint )(((p[0] * 256 + p[1]) * 256 + p[2]) * 256 + p[3]);
+}
+
+static int
+utf32be_code_to_mbclen(OnigCodePoint code ARG_UNUSED,
+		       struct OnigEncodingTypeST* enc ARG_UNUSED)
+{
+  return 4;
+}
+
+static int
+utf32be_code_to_mbc(OnigCodePoint code, UChar *buf,
+		    struct OnigEncodingTypeST* enc ARG_UNUSED)
+{
+  UChar* p = buf;
+
+  *p++ = (UChar )((code & 0xff000000) >>24);
+  *p++ = (UChar )((code & 0xff0000)   >>16);
+  *p++ = (UChar )((code & 0xff00)     >> 8);
+  *p++ = (UChar ) (code & 0xff);
+  return 4;
+}
+
+static int
+utf32be_mbc_case_fold(OnigCaseFoldType flag,
+		      const UChar** pp, const UChar* end, UChar* fold,
+		      struct OnigEncodingTypeST* enc ARG_UNUSED)
+{
+  const UChar* p = *pp;
+
+  if (ONIGENC_IS_ASCII_CODE(*(p+3)) && *(p+2) == 0 && *(p+1) == 0 && *p == 0) {
+    *fold++ = 0;
+    *fold++ = 0;
+
+#ifdef USE_UNICODE_CASE_FOLD_TURKISH_AZERI
+    if ((flag & ONIGENC_CASE_FOLD_TURKISH_AZERI) != 0) {
+      if (*(p+3) == 0x49) {
+	*fold++ = 0x01;
+	*fold   = 0x31;
+	(*pp) += 4;
+	return 4;
+      }
+    }
+#endif
+
+    *fold++ = 0;
+    *fold   = ONIGENC_ASCII_CODE_TO_LOWER_CASE(*(p+3));
+    *pp += 4;
+    return 4;
+  }
+  else
+    return onigenc_unicode_mbc_case_fold(ONIG_ENCODING_UTF32_BE, flag, pp, end,
+					 fold);
+}
+
+#if 0
+static int
+utf32be_is_mbc_ambiguous(OnigCaseFoldType flag, const UChar** pp, const UChar* end)
+{
+  const UChar* p = *pp;
+
+  (*pp) += 4;
+
+  if (*(p+2) == 0 && *(p+1) == 0 && *p == 0) {
+    int c, v;
+
+    p += 3;
+    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*
+utf32be_left_adjust_char_head(const UChar* start, const UChar* s,
+			      struct OnigEncodingTypeST* enc ARG_UNUSED)
+{
+  int rem;
+
+  if (s <= start) return (UChar* )s;
+
+  rem = (s - start) % 4;
+  return (UChar* )(s - rem);
+}
+
+static int
+utf32be_get_case_fold_codes_by_str(OnigCaseFoldType flag,
+				   const OnigUChar* p, const OnigUChar* end,
+				   OnigCaseFoldCodeItem items[],
+				   struct OnigEncodingTypeST* enc ARG_UNUSED)
+{
+  return onigenc_unicode_get_case_fold_codes_by_str(ONIG_ENCODING_UTF32_BE,
+						    flag, p, end, items);
+}
+
+OnigEncodingType OnigEncodingUTF32_BE = {
+  utf32be_mbc_enc_len,
+  "UTF-32BE",   /* name */
+  4,            /* max byte length */
+  4,            /* min byte length */
+  utf32be_is_mbc_newline,
+  utf32be_mbc_to_code,
+  utf32be_code_to_mbclen,
+  utf32be_code_to_mbc,
+  utf32be_mbc_case_fold,
+  onigenc_unicode_apply_all_case_fold,
+  utf32be_get_case_fold_codes_by_str,
+  onigenc_unicode_property_name_to_ctype,
+  onigenc_unicode_is_code_ctype,
+  onigenc_utf16_32_get_ctype_code_range,
+  utf32be_left_adjust_char_head,
+  onigenc_always_false_is_allowed_reverse_match
+};
diff --git a/enc/utf32_le.c b/enc/utf32_le.c
new file mode 100644
index 0000000000..0d443f1b75
--- /dev/null
+++ b/enc/utf32_le.c
@@ -0,0 +1,193 @@
+/**********************************************************************
+  utf32_le.c -  Oniguruma (regular expression library)
+**********************************************************************/
+/*-
+ * Copyright (c) 2002-2007  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, const OnigUChar* e ARG_UNUSED,
+		    struct OnigEncodingTypeST* enc ARG_UNUSED)
+{
+  return 4;
+}
+
+static int
+utf32le_is_mbc_newline(const UChar* p, const UChar* end,
+		       struct OnigEncodingTypeST* enc ARG_UNUSED)
+{
+  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,
+		    struct OnigEncodingTypeST* enc 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,
+		       struct OnigEncodingTypeST* enc ARG_UNUSED)
+{
+  return 4;
+}
+
+static int
+utf32le_code_to_mbc(OnigCodePoint code, UChar *buf,
+		    struct OnigEncodingTypeST* enc ARG_UNUSED)
+{
+  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,
+		      struct OnigEncodingTypeST* enc ARG_UNUSED)
+{
+  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,
+			      struct OnigEncodingTypeST* enc ARG_UNUSED)
+{
+  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[],
+				   struct OnigEncodingTypeST* enc ARG_UNUSED)
+{
+  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
+};