* Makefile.in, */Makefile.sub (VPATH): add enc directory.

* common.mk (ENCOBJS): encoding objects.

* enc: directory for encodings.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@13675 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 320 insertions, 0 deletions

diff --git a/enc/sjis.c b/enc/sjis.c
new file mode 100644
index 0000000000..fbfddcc612
--- /dev/null
+++ b/enc/sjis.c
@@ -0,0 +1,320 @@
+/**********************************************************************
+  sjis.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 "regint.h"
+
+static const int EncLen_SJIS[] = {
+  1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
+  1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
+  1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
+  1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
+  1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
+  1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
+  1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
+  1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
+  1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
+  2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
+  1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
+  1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
+  1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
+  1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
+  2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
+  2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1
+};
+
+static const char SJIS_CAN_BE_TRAIL_TABLE[256] = {
+  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+  1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
+  1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
+  1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
+  1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0,
+  1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
+  1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
+  1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
+  1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
+  1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
+  1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
+  1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
+  1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0
+};
+
+#define SJIS_ISMB_FIRST(byte)  (EncLen_SJIS[byte] > 1)
+#define SJIS_ISMB_TRAIL(byte)  SJIS_CAN_BE_TRAIL_TABLE[(byte)]
+
+static int
+mbc_enc_len(const UChar* p, const UChar* e, OnigEncoding enc)
+{
+  return EncLen_SJIS[*p];
+}
+
+static int
+code_to_mbclen(OnigCodePoint code, OnigEncoding enc)
+{
+  if (code < 256) {
+    if (EncLen_SJIS[(int )code] == 1)
+      return 1;
+    else
+      return 0;
+  }
+  else if (code <= 0xffff) {
+    return 2;
+  }
+  else
+    return 0;
+}
+
+static OnigCodePoint
+mbc_to_code(const UChar* p, const UChar* end, OnigEncoding enc)
+{
+  int c, i, len;
+  OnigCodePoint n;
+
+  len = enc_len(ONIG_ENCODING_SJIS, p, end);
+  c = *p++;
+  n = c;
+  if (len == 1) return n;
+
+  for (i = 1; i < len; i++) {
+    if (p >= end) break;
+    c = *p++;
+    n <<= 8;  n += c;
+  }
+  return n;
+}
+
+static int
+code_to_mbc(OnigCodePoint code, UChar *buf, OnigEncoding enc)
+{
+  UChar *p = buf;
+
+  if ((code & 0xff00) != 0) *p++ = (UChar )(((code >>  8) & 0xff));
+  *p++ = (UChar )(code & 0xff);
+
+#if 0
+  if (enc_len(ONIG_ENCODING_SJIS, buf) != (p - buf))
+    return REGERR_INVALID_WIDE_CHAR_VALUE;
+#endif
+  return p - buf;
+}
+
+static int
+mbc_case_fold(OnigCaseFoldType flag,
+	      const UChar** pp, const UChar* end, UChar* lower,
+	      OnigEncoding enc)
+{
+  const UChar* p = *pp;
+
+  if (ONIGENC_IS_MBC_ASCII(p)) {
+    *lower = ONIGENC_ASCII_CODE_TO_LOWER_CASE(*p);
+    (*pp)++;
+    return 1;
+  }
+  else {
+    int i;
+    int len = enc_len(ONIG_ENCODING_SJIS, p, end);
+
+    for (i = 0; i < len; i++) {
+      *lower++ = *p++;
+    }
+    (*pp) += len;
+    return len; /* return byte length of converted char to lower */
+  }
+}
+
+#if 0
+static int
+is_mbc_ambiguous(OnigCaseFoldType flag,
+		 const UChar** pp, const UChar* end)
+{
+  return onigenc_mbn_is_mbc_ambiguous(ONIG_ENCODING_SJIS, flag, pp, end);
+                                      
+}
+#endif
+
+#if 0
+static int
+is_code_ctype(OnigCodePoint code, unsigned int ctype)
+{
+  if (code < 128)
+    return ONIGENC_IS_ASCII_CODE_CTYPE(code, ctype);
+  else {
+    if (CTYPE_IS_WORD_GRAPH_PRINT(ctype)) {
+      return (code_to_mbclen(code) > 1 ? TRUE : FALSE);
+    }
+  }
+
+  return FALSE;
+}
+#endif
+
+static UChar*
+left_adjust_char_head(const UChar* start, const UChar* s, OnigEncoding enc)
+{
+  const UChar *p;
+  int len;
+
+  if (s <= start) return (UChar* )s;
+  p = s;
+
+  if (SJIS_ISMB_TRAIL(*p)) {
+    while (p > start) {
+      if (! SJIS_ISMB_FIRST(*--p)) {
+	p++;
+	break;
+      }
+    } 
+  }
+  len = enc_len(ONIG_ENCODING_SJIS, p, s);
+  if (p + len > s) return (UChar* )p;
+  p += len;
+  return (UChar* )(p + ((s - p) & ~1));
+}
+
+static int
+is_allowed_reverse_match(const UChar* s, const UChar* end, OnigEncoding enc)
+{
+  const UChar c = *s;
+  return (SJIS_ISMB_TRAIL(c) ? FALSE : TRUE);
+}
+
+
+static int PropertyInited = 0;
+static const OnigCodePoint** PropertyList;
+static int PropertyListNum;
+static int PropertyListSize;
+static hash_table_type* PropertyNameTable;
+
+static const OnigCodePoint CR_Hiragana[] = {
+  1,
+  0x829f, 0x82f1
+}; /* CR_Hiragana */
+
+static const OnigCodePoint CR_Katakana[] = {
+  4,
+  0x00a6, 0x00af,
+  0x00b1, 0x00dd,
+  0x8340, 0x837e,
+  0x8380, 0x8396,
+}; /* CR_Katakana */
+
+static int
+init_property_list(void)
+{
+  int r;
+
+  PROPERTY_LIST_ADD_PROP("Hiragana", CR_Hiragana);
+  PROPERTY_LIST_ADD_PROP("Katakana", CR_Katakana);
+  PropertyInited = 1;
+
+ end:
+  return r;
+}
+
+static int
+property_name_to_ctype(OnigEncoding enc, UChar* p, UChar* end)
+{
+  int ctype;
+
+  PROPERTY_LIST_INIT_CHECK;
+
+  if (onig_st_lookup_strend(PropertyNameTable, p, end, (void*)&ctype) == 0) {
+    return onigenc_minimum_property_name_to_ctype(enc, p, end);
+  }
+
+  return ctype;
+}
+
+static int
+is_code_ctype(OnigCodePoint code, unsigned int ctype, OnigEncoding enc)
+{
+  if (ctype <= ONIGENC_MAX_STD_CTYPE) {
+    if (code < 128)
+      return ONIGENC_IS_ASCII_CODE_CTYPE(code, ctype);
+    else {
+      if (CTYPE_IS_WORD_GRAPH_PRINT(ctype)) {
+	return (code_to_mbclen(code, enc) > 1 ? TRUE : FALSE);
+      }
+    }
+  }
+  else {
+    PROPERTY_LIST_INIT_CHECK;
+
+    ctype -= (ONIGENC_MAX_STD_CTYPE + 1);
+    if (ctype >= (unsigned int )PropertyListNum)
+      return ONIGENC_ERR_TYPE_BUG;
+
+    return onig_is_in_code_range((UChar* )PropertyList[ctype], code);
+  }
+
+  return FALSE;
+}
+
+static int
+get_ctype_code_range(int ctype, OnigCodePoint* sb_out,
+		     const OnigCodePoint* ranges[], OnigEncoding enc)
+{
+  if (ctype <= ONIGENC_MAX_STD_CTYPE) {
+    return ONIG_NO_SUPPORT_CONFIG;
+  }
+  else {
+    *sb_out = 0x80;
+
+    PROPERTY_LIST_INIT_CHECK;
+
+    ctype -= (ONIGENC_MAX_STD_CTYPE + 1);
+    if (ctype >= PropertyListNum)
+      return ONIGENC_ERR_TYPE_BUG;
+
+    *ranges = PropertyList[ctype];
+    return 0;
+  }
+}
+
+OnigEncodingType OnigEncodingSJIS = {
+  mbc_enc_len,
+  "Shift_JIS",   /* name */
+  2,             /* max byte length */
+  1,             /* min byte length */
+  onigenc_is_mbc_newline_0x0a,
+  mbc_to_code,
+  code_to_mbclen,
+  code_to_mbc,
+  mbc_case_fold,
+  onigenc_ascii_apply_all_case_fold,
+  onigenc_ascii_get_case_fold_codes_by_str,
+  property_name_to_ctype,
+  is_code_ctype,
+  get_ctype_code_range,
+  left_adjust_char_head,
+  is_allowed_reverse_match,
+  0
+};