summaryrefslogtreecommitdiff
path: root/src/gb18030.c
diff options
context:
space:
mode:
Diffstat (limited to 'src/gb18030.c')
-rw-r--r--src/gb18030.c497
1 files changed, 497 insertions, 0 deletions
diff --git a/src/gb18030.c b/src/gb18030.c
new file mode 100644
index 0000000..beeda06
--- /dev/null
+++ b/src/gb18030.c
@@ -0,0 +1,497 @@
+/**********************************************************************
+ gb18030.c - Oniguruma (regular expression library)
+**********************************************************************/
+/*-
+ * Copyright (c) 2005-2016 KUBO Takehiro <kubo AT jiubao DOT org>
+ * 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"
+
+#if 1
+#define DEBUG_GB18030(arg)
+#else
+#define DEBUG_GB18030(arg) printf arg
+#endif
+
+enum {
+ C1, /* one-byte char */
+ C2, /* one-byte or second of two-byte char */
+ C4, /* one-byte or second or fourth of four-byte char */
+ CM /* first of two- or four-byte char or second of two-byte char */
+};
+
+static const char GB18030_MAP[] = {
+ C1, C1, C1, C1, C1, C1, C1, C1, C1, C1, C1, C1, C1, C1, C1, C1,
+ C1, C1, C1, C1, C1, C1, C1, C1, C1, C1, C1, C1, C1, C1, C1, C1,
+ C1, C1, C1, C1, C1, C1, C1, C1, C1, C1, C1, C1, C1, C1, C1, C1,
+ C4, C4, C4, C4, C4, C4, C4, C4, C4, C4, C1, C1, C1, C1, C1, C1,
+ C2, C2, C2, C2, C2, C2, C2, C2, C2, C2, C2, C2, C2, C2, C2, C2,
+ C2, C2, C2, C2, C2, C2, C2, C2, C2, C2, C2, C2, C2, C2, C2, C2,
+ C2, C2, C2, C2, C2, C2, C2, C2, C2, C2, C2, C2, C2, C2, C2, C2,
+ C2, C2, C2, C2, C2, C2, C2, C2, C2, C2, C2, C2, C2, C2, C2, C1,
+ C2, CM, CM, CM, CM, CM, CM, CM, CM, CM, CM, CM, CM, CM, CM, CM,
+ CM, CM, CM, CM, CM, CM, CM, CM, CM, CM, CM, CM, CM, CM, CM, CM,
+ CM, CM, CM, CM, CM, CM, CM, CM, CM, CM, CM, CM, CM, CM, CM, CM,
+ CM, CM, CM, CM, CM, CM, CM, CM, CM, CM, CM, CM, CM, CM, CM, CM,
+ CM, CM, CM, CM, CM, CM, CM, CM, CM, CM, CM, CM, CM, CM, CM, CM,
+ CM, CM, CM, CM, CM, CM, CM, CM, CM, CM, CM, CM, CM, CM, CM, CM,
+ CM, CM, CM, CM, CM, CM, CM, CM, CM, CM, CM, CM, CM, CM, CM, CM,
+ CM, CM, CM, CM, CM, CM, CM, CM, CM, CM, CM, CM, CM, CM, CM, C1
+};
+
+static int
+gb18030_mbc_enc_len(const UChar* p)
+{
+ if (GB18030_MAP[*p] != CM)
+ return 1;
+ p++;
+ if (GB18030_MAP[*p] == C4)
+ return 4;
+ if (GB18030_MAP[*p] == C1)
+ return 1; /* illegal sequence */
+ return 2;
+}
+
+static OnigCodePoint
+gb18030_mbc_to_code(const UChar* p, const UChar* end)
+{
+ return onigenc_mbn_mbc_to_code(ONIG_ENCODING_GB18030, p, end);
+}
+
+static int
+gb18030_code_to_mbc(OnigCodePoint code, UChar *buf)
+{
+ return onigenc_mb4_code_to_mbc(ONIG_ENCODING_GB18030, code, buf);
+}
+
+static int
+gb18030_mbc_case_fold(OnigCaseFoldType flag, const UChar** pp, const UChar* end,
+ UChar* lower)
+{
+ return onigenc_mbn_mbc_case_fold(ONIG_ENCODING_GB18030, flag,
+ pp, end, lower);
+}
+
+#if 0
+static int
+gb18030_is_mbc_ambiguous(OnigCaseFoldType flag,
+ const UChar** pp, const UChar* end)
+{
+ return onigenc_mbn_is_mbc_ambiguous(ONIG_ENCODING_GB18030, flag, pp, end);
+}
+#endif
+
+static int
+gb18030_is_code_ctype(OnigCodePoint code, unsigned int ctype)
+{
+ return onigenc_mb4_is_code_ctype(ONIG_ENCODING_GB18030, code, ctype);
+}
+
+enum state {
+ S_START,
+ S_one_C2,
+ S_one_C4,
+ S_one_CM,
+
+ S_odd_CM_one_CX,
+ S_even_CM_one_CX,
+
+ /* CMC4 : pair of "CM C4" */
+ S_one_CMC4,
+ S_odd_CMC4,
+ S_one_C4_odd_CMC4,
+ S_even_CMC4,
+ S_one_C4_even_CMC4,
+
+ S_odd_CM_odd_CMC4,
+ S_even_CM_odd_CMC4,
+
+ S_odd_CM_even_CMC4,
+ S_even_CM_even_CMC4,
+
+ /* C4CM : pair of "C4 CM" */
+ S_odd_C4CM,
+ S_one_CM_odd_C4CM,
+ S_even_C4CM,
+ S_one_CM_even_C4CM,
+
+ S_even_CM_odd_C4CM,
+ S_odd_CM_odd_C4CM,
+ S_even_CM_even_C4CM,
+ S_odd_CM_even_C4CM,
+};
+
+static UChar*
+gb18030_left_adjust_char_head(const UChar* start, const UChar* s)
+{
+ const UChar *p;
+ enum state state = S_START;
+
+ DEBUG_GB18030(("----------------\n"));
+ for (p = s; p >= start; p--) {
+ DEBUG_GB18030(("state %d --(%02x)-->\n", state, *p));
+ switch (state) {
+ case S_START:
+ switch (GB18030_MAP[*p]) {
+ case C1:
+ return (UChar *)s;
+ case C2:
+ state = S_one_C2; /* C2 */
+ break;
+ case C4:
+ state = S_one_C4; /* C4 */
+ break;
+ case CM:
+ state = S_one_CM; /* CM */
+ break;
+ }
+ break;
+ case S_one_C2: /* C2 */
+ switch (GB18030_MAP[*p]) {
+ case C1:
+ case C2:
+ case C4:
+ return (UChar *)s;
+ case CM:
+ state = S_odd_CM_one_CX; /* CM C2 */
+ break;
+ }
+ break;
+ case S_one_C4: /* C4 */
+ switch (GB18030_MAP[*p]) {
+ case C1:
+ case C2:
+ case C4:
+ return (UChar *)s;
+ case CM:
+ state = S_one_CMC4;
+ break;
+ }
+ break;
+ case S_one_CM: /* CM */
+ switch (GB18030_MAP[*p]) {
+ case C1:
+ case C2:
+ return (UChar *)s;
+ case C4:
+ state = S_odd_C4CM;
+ break;
+ case CM:
+ state = S_odd_CM_one_CX; /* CM CM */
+ break;
+ }
+ break;
+
+ case S_odd_CM_one_CX: /* CM C2 */ /* CM CM */ /* CM CM CM C4 */
+ switch (GB18030_MAP[*p]) {
+ case C1:
+ case C2:
+ case C4:
+ return (UChar *)(s - 1);
+ case CM:
+ state = S_even_CM_one_CX;
+ break;
+ }
+ break;
+ case S_even_CM_one_CX: /* CM CM C2 */ /* CM CM CM */ /* CM CM C4 */
+ switch (GB18030_MAP[*p]) {
+ case C1:
+ case C2:
+ case C4:
+ return (UChar *)s;
+ case CM:
+ state = S_odd_CM_one_CX;
+ break;
+ }
+ break;
+
+ case S_one_CMC4: /* CM C4 */
+ switch (GB18030_MAP[*p]) {
+ case C1:
+ case C2:
+ return (UChar *)(s - 1);
+ case C4:
+ state = S_one_C4_odd_CMC4; /* C4 CM C4 */
+ break;
+ case CM:
+ state = S_even_CM_one_CX; /* CM CM C4 */
+ break;
+ }
+ break;
+ case S_odd_CMC4: /* CM C4 CM C4 CM C4 */
+ switch (GB18030_MAP[*p]) {
+ case C1:
+ case C2:
+ return (UChar *)(s - 1);
+ case C4:
+ state = S_one_C4_odd_CMC4;
+ break;
+ case CM:
+ state = S_odd_CM_odd_CMC4;
+ break;
+ }
+ break;
+ case S_one_C4_odd_CMC4: /* C4 CM C4 */
+ switch (GB18030_MAP[*p]) {
+ case C1:
+ case C2:
+ case C4:
+ return (UChar *)(s - 1);
+ case CM:
+ state = S_even_CMC4; /* CM C4 CM C4 */
+ break;
+ }
+ break;
+ case S_even_CMC4: /* CM C4 CM C4 */
+ switch (GB18030_MAP[*p]) {
+ case C1:
+ case C2:
+ return (UChar *)(s - 3);
+ case C4:
+ state = S_one_C4_even_CMC4;
+ break;
+ case CM:
+ state = S_odd_CM_even_CMC4;
+ break;
+ }
+ break;
+ case S_one_C4_even_CMC4: /* C4 CM C4 CM C4 */
+ switch (GB18030_MAP[*p]) {
+ case C1:
+ case C2:
+ case C4:
+ return (UChar *)(s - 3);
+ case CM:
+ state = S_odd_CMC4;
+ break;
+ }
+ break;
+
+ case S_odd_CM_odd_CMC4: /* CM CM C4 CM C4 CM C4 */
+ switch (GB18030_MAP[*p]) {
+ case C1:
+ case C2:
+ case C4:
+ return (UChar *)(s - 3);
+ case CM:
+ state = S_even_CM_odd_CMC4;
+ break;
+ }
+ break;
+ case S_even_CM_odd_CMC4: /* CM CM CM C4 CM C4 CM C4 */
+ switch (GB18030_MAP[*p]) {
+ case C1:
+ case C2:
+ case C4:
+ return (UChar *)(s - 1);
+ case CM:
+ state = S_odd_CM_odd_CMC4;
+ break;
+ }
+ break;
+
+ case S_odd_CM_even_CMC4: /* CM CM C4 CM C4 */
+ switch (GB18030_MAP[*p]) {
+ case C1:
+ case C2:
+ case C4:
+ return (UChar *)(s - 1);
+ case CM:
+ state = S_even_CM_even_CMC4;
+ break;
+ }
+ break;
+ case S_even_CM_even_CMC4: /* CM CM CM C4 CM C4 */
+ switch (GB18030_MAP[*p]) {
+ case C1:
+ case C2:
+ case C4:
+ return (UChar *)(s - 3);
+ case CM:
+ state = S_odd_CM_even_CMC4;
+ break;
+ }
+ break;
+
+ case S_odd_C4CM: /* C4 CM */ /* C4 CM C4 CM C4 CM*/
+ switch (GB18030_MAP[*p]) {
+ case C1:
+ case C2:
+ case C4:
+ return (UChar *)s;
+ case CM:
+ state = S_one_CM_odd_C4CM; /* CM C4 CM */
+ break;
+ }
+ break;
+ case S_one_CM_odd_C4CM: /* CM C4 CM */ /* CM C4 CM C4 CM C4 CM */
+ switch (GB18030_MAP[*p]) {
+ case C1:
+ case C2:
+ return (UChar *)(s - 2); /* |CM C4 CM */
+ case C4:
+ state = S_even_C4CM;
+ break;
+ case CM:
+ state = S_even_CM_odd_C4CM;
+ break;
+ }
+ break;
+ case S_even_C4CM: /* C4 CM C4 CM */
+ switch (GB18030_MAP[*p]) {
+ case C1:
+ case C2:
+ case C4:
+ return (UChar *)(s - 2); /* C4|CM C4 CM */
+ case CM:
+ state = S_one_CM_even_C4CM;
+ break;
+ }
+ break;
+ case S_one_CM_even_C4CM: /* CM C4 CM C4 CM */
+ switch (GB18030_MAP[*p]) {
+ case C1:
+ case C2:
+ return (UChar *)(s - 0); /*|CM C4 CM C4|CM */
+ case C4:
+ state = S_odd_C4CM;
+ break;
+ case CM:
+ state = S_even_CM_even_C4CM;
+ break;
+ }
+ break;
+
+ case S_even_CM_odd_C4CM: /* CM CM C4 CM */
+ switch (GB18030_MAP[*p]) {
+ case C1:
+ case C2:
+ case C4:
+ return (UChar *)(s - 0); /* |CM CM|C4|CM */
+ case CM:
+ state = S_odd_CM_odd_C4CM;
+ break;
+ }
+ break;
+ case S_odd_CM_odd_C4CM: /* CM CM CM C4 CM */
+ switch (GB18030_MAP[*p]) {
+ case C1:
+ case C2:
+ case C4:
+ return (UChar *)(s - 2); /* |CM CM|CM C4 CM */
+ case CM:
+ state = S_even_CM_odd_C4CM;
+ break;
+ }
+ break;
+
+ case S_even_CM_even_C4CM: /* CM CM C4 CM C4 CM */
+ switch (GB18030_MAP[*p]) {
+ case C1:
+ case C2:
+ case C4:
+ return (UChar *)(s - 2); /* |CM CM|C4|CM C4 CM */
+ case CM:
+ state = S_odd_CM_even_C4CM;
+ break;
+ }
+ break;
+ case S_odd_CM_even_C4CM: /* CM CM CM C4 CM C4 CM */
+ switch (GB18030_MAP[*p]) {
+ case C1:
+ case C2:
+ case C4:
+ return (UChar *)(s - 0); /* |CM CM|CM C4 CM C4|CM */
+ case CM:
+ state = S_even_CM_even_C4CM;
+ break;
+ }
+ break;
+ }
+ }
+
+ DEBUG_GB18030(("state %d\n", state));
+ switch (state) {
+ case S_START: return (UChar *)(s - 0);
+ case S_one_C2: return (UChar *)(s - 0);
+ case S_one_C4: return (UChar *)(s - 0);
+ case S_one_CM: return (UChar *)(s - 0);
+
+ case S_odd_CM_one_CX: return (UChar *)(s - 1);
+ case S_even_CM_one_CX: return (UChar *)(s - 0);
+
+ case S_one_CMC4: return (UChar *)(s - 1);
+ case S_odd_CMC4: return (UChar *)(s - 1);
+ case S_one_C4_odd_CMC4: return (UChar *)(s - 1);
+ case S_even_CMC4: return (UChar *)(s - 3);
+ case S_one_C4_even_CMC4: return (UChar *)(s - 3);
+
+ case S_odd_CM_odd_CMC4: return (UChar *)(s - 3);
+ case S_even_CM_odd_CMC4: return (UChar *)(s - 1);
+
+ case S_odd_CM_even_CMC4: return (UChar *)(s - 1);
+ case S_even_CM_even_CMC4: return (UChar *)(s - 3);
+
+ case S_odd_C4CM: return (UChar *)(s - 0);
+ case S_one_CM_odd_C4CM: return (UChar *)(s - 2);
+ case S_even_C4CM: return (UChar *)(s - 2);
+ case S_one_CM_even_C4CM: return (UChar *)(s - 0);
+
+ case S_even_CM_odd_C4CM: return (UChar *)(s - 0);
+ case S_odd_CM_odd_C4CM: return (UChar *)(s - 2);
+ case S_even_CM_even_C4CM: return (UChar *)(s - 2);
+ case S_odd_CM_even_C4CM: return (UChar *)(s - 0);
+ }
+
+ return (UChar* )s; /* never come here. (escape warning) */
+}
+
+static int
+gb18030_is_allowed_reverse_match(const UChar* s, const UChar* end ARG_UNUSED)
+{
+ return GB18030_MAP[*s] == C1 ? TRUE : FALSE;
+}
+
+OnigEncodingType OnigEncodingGB18030 = {
+ gb18030_mbc_enc_len,
+ "GB18030", /* name */
+ 4, /* max enc length */
+ 1, /* min enc length */
+ onigenc_is_mbc_newline_0x0a,
+ gb18030_mbc_to_code,
+ onigenc_mb4_code_to_mbclen,
+ gb18030_code_to_mbc,
+ gb18030_mbc_case_fold,
+ onigenc_ascii_apply_all_case_fold,
+ onigenc_ascii_get_case_fold_codes_by_str,
+ onigenc_minimum_property_name_to_ctype,
+ gb18030_is_code_ctype,
+ onigenc_not_support_get_ctype_code_range,
+ gb18030_left_adjust_char_head,
+ gb18030_is_allowed_reverse_match,
+ NULL, /* init */
+ NULL /* is_initialized */
+};
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-27 07:13:11 +0000