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authorNARUSE, Yui <naruse@airemix.jp>2019-06-17 08:50:44 +0900
committerNARUSE, Yui <naruse@airemix.jp>2019-06-24 12:58:33 +0900
commit7f64a0b4db7ee27a04579236950d88301c7bcabb (patch)
tree78bdba19bd599e32a87d29c882e5eee8cc360203 /enc
parent0e6396d2ac8bc3803742655896bb0fad70007dda (diff)
Add new encoding CESU-8 [Feature #15931]
Diffstat (limited to 'enc')
-rw-r--r--enc/cesu_8.c456
1 files changed, 456 insertions, 0 deletions
diff --git a/enc/cesu_8.c b/enc/cesu_8.c
new file mode 100644
index 0000000..b34b0fb
--- /dev/null
+++ b/enc/cesu_8.c
@@ -0,0 +1,456 @@
+/**********************************************************************
+ cesu_8.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"
+#ifdef RUBY
+# include "encindex.h"
+#endif
+
+#define USE_INVALID_CODE_SCHEME
+
+#ifdef USE_INVALID_CODE_SCHEME
+/* virtual codepoint values for invalid encoding byte 0xfe and 0xff */
+# define INVALID_CODE_FE 0xfffffffe
+# define INVALID_CODE_FF 0xffffffff
+#endif
+#define VALID_CODE_LIMIT 0x0010ffff
+
+#define utf8_islead(c) ((UChar )((c) & 0xc0) != 0x80)
+
+static const int EncLen_CESU8[] = {
+ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
+ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
+ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
+ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
+ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
+ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
+ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
+ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
+ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
+ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
+ 1, 1, 1, 1, 1, 1, 1, 1, 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, 2,
+ 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
+ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1
+};
+
+typedef enum {
+ FAILURE = -2,
+ ACCEPT,
+ S0, S1, S2, S3,
+ S4, S5, S6, S7
+} state_t;
+#define A ACCEPT
+#define F FAILURE
+static const signed char trans[][0x100] = {
+ { /* S0 0 1 2 3 4 5 6 7 8 9 a b c d e f */
+ /* 0 */ A, A, A, A, A, A, A, A, A, A, A, A, A, A, A, A,
+ /* 1 */ A, A, A, A, A, A, A, A, A, A, A, A, A, A, A, A,
+ /* 2 */ A, A, A, A, A, A, A, A, A, A, A, A, A, A, A, A,
+ /* 3 */ A, A, A, A, A, A, A, A, A, A, A, A, A, A, A, A,
+ /* 4 */ A, A, A, A, A, A, A, A, A, A, A, A, A, A, A, A,
+ /* 5 */ A, A, A, A, A, A, A, A, A, A, A, A, A, A, A, A,
+ /* 6 */ A, A, A, A, A, A, A, A, A, A, A, A, A, A, A, A,
+ /* 7 */ A, A, A, A, A, A, A, A, A, A, A, A, A, A, A, A,
+ /* 8 */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
+ /* 9 */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
+ /* a */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
+ /* b */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
+ /* c */ F, F, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
+ /* d */ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
+ /* e */ 2, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 4, 3, 3,
+ /* f */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F
+ },
+ { /* S1 0 1 2 3 4 5 6 7 8 9 a b c d e f */
+ /* 0 */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
+ /* 1 */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
+ /* 2 */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
+ /* 3 */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
+ /* 4 */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
+ /* 5 */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
+ /* 6 */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
+ /* 7 */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
+ /* 8 */ A, A, A, A, A, A, A, A, A, A, A, A, A, A, A, A,
+ /* 9 */ A, A, A, A, A, A, A, A, A, A, A, A, A, A, A, A,
+ /* a */ A, A, A, A, A, A, A, A, A, A, A, A, A, A, A, A,
+ /* b */ A, A, A, A, A, A, A, A, A, A, A, A, A, A, A, A,
+ /* c */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
+ /* d */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
+ /* e */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
+ /* f */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F
+ },
+ { /* S2 0 1 2 3 4 5 6 7 8 9 a b c d e f */
+ /* 0 */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
+ /* 1 */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
+ /* 2 */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
+ /* 3 */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
+ /* 4 */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
+ /* 5 */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
+ /* 6 */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
+ /* 7 */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
+ /* 8 */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
+ /* 9 */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
+ /* a */ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
+ /* b */ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
+ /* c */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
+ /* d */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
+ /* e */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
+ /* f */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F
+ },
+ { /* S3 0 1 2 3 4 5 6 7 8 9 a b c d e f */
+ /* 0 */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
+ /* 1 */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
+ /* 2 */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
+ /* 3 */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
+ /* 4 */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
+ /* 5 */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
+ /* 6 */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
+ /* 7 */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
+ /* 8 */ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
+ /* 9 */ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
+ /* a */ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
+ /* b */ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
+ /* c */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
+ /* d */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
+ /* e */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
+ /* f */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F
+ },
+ { /* S4 0 1 2 3 4 5 6 7 8 9 a b c d e f */
+ /* 0 */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
+ /* 1 */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
+ /* 2 */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
+ /* 3 */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
+ /* 4 */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
+ /* 5 */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
+ /* 6 */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
+ /* 7 */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
+ /* 8 */ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
+ /* 9 */ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
+ /* a */ 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5,
+ /* b */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
+ /* c */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
+ /* d */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
+ /* e */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
+ /* f */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F
+ },
+ { /* S5 0 1 2 3 4 5 6 7 8 9 a b c d e f */
+ /* 0 */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
+ /* 1 */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
+ /* 2 */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
+ /* 3 */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
+ /* 4 */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
+ /* 5 */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
+ /* 6 */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
+ /* 7 */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
+ /* 8 */ 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6,
+ /* 9 */ 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6,
+ /* a */ 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6,
+ /* b */ 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6,
+ /* c */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
+ /* d */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
+ /* e */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
+ /* f */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F
+ },
+ { /* S6 0 1 2 3 4 5 6 7 8 9 a b c d e f */
+ /* 0 */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
+ /* 1 */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
+ /* 2 */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
+ /* 3 */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
+ /* 4 */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
+ /* 5 */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
+ /* 6 */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
+ /* 7 */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
+ /* 8 */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
+ /* 9 */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
+ /* a */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
+ /* b */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
+ /* c */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
+ /* d */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
+ /* e */ F, F, F, F, F, F, F, F, F, F, F, F, F, 7, F, F,
+ /* f */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F
+ },
+ { /* S7 0 1 2 3 4 5 6 7 8 9 a b c d e f */
+ /* 0 */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
+ /* 1 */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
+ /* 2 */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
+ /* 3 */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
+ /* 4 */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
+ /* 5 */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
+ /* 6 */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
+ /* 7 */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
+ /* 8 */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
+ /* 9 */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
+ /* a */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
+ /* b */ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
+ /* c */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
+ /* d */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
+ /* e */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
+ /* f */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F
+ },
+};
+#undef A
+#undef F
+
+static int
+mbc_enc_len(const UChar* p, const UChar* e, OnigEncoding enc ARG_UNUSED)
+{
+ int firstbyte = *p++;
+ state_t s;
+ s = trans[0][firstbyte];
+ if (s < 0) return s == ACCEPT ? ONIGENC_CONSTRUCT_MBCLEN_CHARFOUND(1) :
+ ONIGENC_CONSTRUCT_MBCLEN_INVALID();
+
+ if (p == e) return ONIGENC_CONSTRUCT_MBCLEN_NEEDMORE(EncLen_CESU8[firstbyte]-1);
+ s = trans[s][*p++];
+ if (s < 0) return s == ACCEPT ? ONIGENC_CONSTRUCT_MBCLEN_CHARFOUND(2) :
+ ONIGENC_CONSTRUCT_MBCLEN_INVALID();
+
+ if (p == e) {
+ int len = EncLen_CESU8[firstbyte];
+ if (s == 4) { /* S4 is CESU-8's surrogate pair; len is 6 */
+ len = 6;
+ }
+ return ONIGENC_CONSTRUCT_MBCLEN_NEEDMORE(len-2);
+ }
+ s = trans[s][*p++];
+ if (s < 0) return s == ACCEPT ? ONIGENC_CONSTRUCT_MBCLEN_CHARFOUND(3) :
+ ONIGENC_CONSTRUCT_MBCLEN_INVALID();
+
+ if (p == e) return ONIGENC_CONSTRUCT_MBCLEN_NEEDMORE(3);
+ s = trans[s][*p++];
+ if (s < 0) return s == ACCEPT ? ONIGENC_CONSTRUCT_MBCLEN_CHARFOUND(4) :
+ ONIGENC_CONSTRUCT_MBCLEN_INVALID();
+
+ if (p == e) return ONIGENC_CONSTRUCT_MBCLEN_NEEDMORE(2);
+ s = trans[s][*p++];
+ if (s < 0) return s == ACCEPT ? ONIGENC_CONSTRUCT_MBCLEN_CHARFOUND(5) :
+ ONIGENC_CONSTRUCT_MBCLEN_INVALID();
+
+ if (p == e) return ONIGENC_CONSTRUCT_MBCLEN_NEEDMORE(1);
+ s = trans[s][*p++];
+ return s == ACCEPT ? ONIGENC_CONSTRUCT_MBCLEN_CHARFOUND(6) :
+ ONIGENC_CONSTRUCT_MBCLEN_INVALID();
+}
+
+static int
+is_mbc_newline(const UChar* p, const UChar* end, OnigEncoding enc)
+{
+ if (p < end) {
+ if (*p == 0x0a) return 1;
+
+#ifdef USE_UNICODE_ALL_LINE_TERMINATORS
+ if (*p == 0x0b || *p == 0x0c || *p == 0x0d) return 1;
+ if (p + 1 < end) {
+ if (*(p+1) == 0x85 && *p == 0xc2) /* U+0085 */
+ return 1;
+ if (p + 2 < end) {
+ if ((*(p+2) == 0xa8 || *(p+2) == 0xa9)
+ && *(p+1) == 0x80 && *p == 0xe2) /* U+2028, U+2029 */
+ return 1;
+ }
+ }
+#endif
+ }
+
+ return 0;
+}
+
+static OnigCodePoint
+mbc_to_code(const UChar* p, const UChar* end, OnigEncoding enc)
+{
+ int len;
+
+ len = mbc_enc_len(p, end, enc);
+ switch (len) {
+ case 1:
+ return *p;
+ case 2:
+ return ((p[0] & 0x1F) << 6) | (p[1] & 0x3f);
+ case 3:
+ return ((p[0] & 0xF) << 12) | ((p[1] & 0x3f) << 6) | (p[2] & 0x3f);
+ case 6:
+ {
+ int high = ((p[0] & 0xF) << 12) | ((p[1] & 0x3f) << 6) | (p[2] & 0x3f);
+ int low = ((p[3] & 0xF) << 12) | ((p[4] & 0x3f) << 6) | (p[5] & 0x3f);
+ return ((high & 0x03ff) << 10) + (low & 0x03ff) + 0x10000;
+ }
+ default:
+ UNREACHABLE;
+ }
+#ifdef USE_INVALID_CODE_SCHEME
+ if (*p > 0xfd) {
+ return ((*p == 0xfe) ? INVALID_CODE_FE : INVALID_CODE_FF);
+ }
+#endif
+ return (OnigCodePoint )*p;
+}
+
+static int
+code_to_mbclen(OnigCodePoint code, OnigEncoding enc ARG_UNUSED)
+{
+ if ((code & 0xffffff80) == 0) return 1;
+ else if ((code & 0xfffff800) == 0) return 2;
+ else if ((code & 0xffff0000) == 0) return 3;
+ else if (code <= VALID_CODE_LIMIT) return 6;
+#ifdef USE_INVALID_CODE_SCHEME
+ else if (code == INVALID_CODE_FE) return 1;
+ else if (code == INVALID_CODE_FF) return 1;
+#endif
+ else
+ return ONIGERR_TOO_BIG_WIDE_CHAR_VALUE;
+}
+
+static int
+code_to_mbc(OnigCodePoint code, UChar *buf, OnigEncoding enc ARG_UNUSED)
+{
+#define UTF8_TRAILS(code, shift) (UChar )((((code) >> (shift)) & 0x3f) | 0x80)
+#define UTF8_TRAIL0(code) (UChar )(((code) & 0x3f) | 0x80)
+
+ if ((code & 0xffffff80) == 0) {
+ *buf = (UChar )code;
+ return 1;
+ }
+ else {
+ UChar *p = buf;
+
+ if ((code & 0xfffff800) == 0) {
+ *p++ = (UChar )(((code>>6)& 0x1f) | 0xc0);
+ }
+ else if ((code & 0xffff0000) == 0) {
+ *p++ = (UChar )(((code>>12) & 0x0f) | 0xe0);
+ *p++ = UTF8_TRAILS(code, 6);
+ }
+ else if (code <= VALID_CODE_LIMIT) {
+ unsigned int high = (code >> 10) + 0xD7C0;
+ code = (code & 0x3FF) + 0xDC00;
+ *p++ = (UChar )(((high>>12) & 0x0f) | 0xe0);
+ *p++ = UTF8_TRAILS(high, 6);
+ *p++ = UTF8_TRAIL0(high);
+ *p++ = (UChar )(((code>>12) & 0x0f) | 0xe0);
+ *p++ = UTF8_TRAILS(code, 6);
+ }
+#ifdef USE_INVALID_CODE_SCHEME
+ else if (code == INVALID_CODE_FE) {
+ *p = 0xfe;
+ return 1;
+ }
+ else if (code == INVALID_CODE_FF) {
+ *p = 0xff;
+ return 1;
+ }
+#endif
+ else {
+ return ONIGERR_TOO_BIG_WIDE_CHAR_VALUE;
+ }
+
+ *p++ = UTF8_TRAIL0(code);
+ return (int )(p - buf);
+ }
+}
+
+static int
+mbc_case_fold(OnigCaseFoldType flag, const UChar** pp,
+ const UChar* end, UChar* fold, OnigEncoding enc)
+{
+ const UChar* p = *pp;
+
+ if (ONIGENC_IS_MBC_ASCII(p)) {
+#ifdef USE_UNICODE_CASE_FOLD_TURKISH_AZERI
+ if ((flag & ONIGENC_CASE_FOLD_TURKISH_AZERI) != 0) {
+ if (*p == 0x49) {
+ *fold++ = 0xc4;
+ *fold = 0xb1;
+ (*pp)++;
+ return 2;
+ }
+ }
+#endif
+
+ *fold = ONIGENC_ASCII_CODE_TO_LOWER_CASE(*p);
+ (*pp)++;
+ return 1; /* return byte length of converted char to lower */
+ }
+ else {
+ return onigenc_unicode_mbc_case_fold(enc, flag, pp, end, fold);
+ }
+}
+
+
+static int
+get_ctype_code_range(OnigCtype ctype, OnigCodePoint *sb_out,
+ const OnigCodePoint* ranges[], OnigEncoding enc ARG_UNUSED)
+{
+ *sb_out = 0x80;
+ return onigenc_unicode_ctype_code_range(ctype, ranges);
+}
+
+
+static UChar*
+left_adjust_char_head(const UChar* start, const UChar* s, const UChar* end, OnigEncoding enc ARG_UNUSED)
+{
+ const UChar *p;
+
+ if (s <= start) return (UChar* )s;
+ p = s;
+
+ while (!utf8_islead(*p) && p > start) p--;
+ return (UChar* )p;
+}
+
+static int
+get_case_fold_codes_by_str(OnigCaseFoldType flag,
+ const OnigUChar* p, const OnigUChar* end, OnigCaseFoldCodeItem items[],
+ OnigEncoding enc)
+{
+ return onigenc_unicode_get_case_fold_codes_by_str(enc, flag, p, end, items);
+}
+
+OnigEncodingDefine(cesu_8, CESU_8) = {
+ mbc_enc_len,
+ "CESU-8", /* name */
+ 6, /* max byte length */
+ 1, /* min byte length */
+ is_mbc_newline,
+ mbc_to_code,
+ code_to_mbclen,
+ code_to_mbc,
+ mbc_case_fold,
+ onigenc_unicode_apply_all_case_fold,
+ get_case_fold_codes_by_str,
+ onigenc_unicode_property_name_to_ctype,
+ onigenc_unicode_is_code_ctype,
+ get_ctype_code_range,
+ left_adjust_char_head,
+ onigenc_always_true_is_allowed_reverse_match,
+ onigenc_unicode_case_map,
+ ENCINDEX_UTF_8,
+ ONIGENC_FLAG_UNICODE,
+};