Imported Upstream version 6.0.0upstream/6.0.0

1 files changed, 229 insertions, 0 deletions

diff --git a/src/utf16_le.c b/src/utf16_le.c
new file mode 100644
index 0000000..2d9af52
--- /dev/null
+++ b/src/utf16_le.c
@@ -0,0 +1,229 @@
+/**********************************************************************
+  utf16_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 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_code_to_mbclen(OnigCodePoint code)
+{
+  return (code > 0xffff ? 4 : 2);
+}
+
+static int
+utf16le_mbc_enc_len(const UChar* p)
+{
+  return EncLen_UTF16[*(p+1)];
+}
+
+static int
+utf16le_is_mbc_newline(const UChar* p, const UChar* end)
+{
+  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)
+{
+  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_mbc(OnigCodePoint code, UChar *buf)
+{
+  UChar* p = buf;
+
+  if (code > 0xffff) {
+    unsigned int plane, high;
+
+    plane = (code >> 16) - 1;
+    high = (code & 0xff00) >> 8;
+
+    *p++ = ((plane & 0x03) << 6) + (high >> 2);
+    *p++ = (plane >> 2) + 0xd8;
+    *p++ = (UChar )(code & 0xff);
+    *p   = (high & 0x03) + 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)
+{
+  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)
+{
+  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[])
+{
+  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,
+  NULL, /* init */
+  NULL  /* is_initialized */
+};