From fcbf63e62c627deae76c1b8cb8c0876c536ed811 Mon Sep 17 00:00:00 2001
From: Jari Vetoniemi <jari.vetoniemi@indooratlas.com>
Date: Mon, 16 Mar 2020 18:49:26 +0900
Subject: Fresh start

---
 jni/iconv/lib/johab.h | 139 ++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 139 insertions(+)
 create mode 100644 jni/iconv/lib/johab.h

(limited to 'jni/iconv/lib/johab.h')

diff --git a/jni/iconv/lib/johab.h b/jni/iconv/lib/johab.h
new file mode 100644
index 0000000..fb2c17f
--- /dev/null
+++ b/jni/iconv/lib/johab.h
@@ -0,0 +1,139 @@
+/*
+ * Copyright (C) 1999-2001, 2007 Free Software Foundation, Inc.
+ * This file is part of the GNU LIBICONV Library.
+ *
+ * The GNU LIBICONV Library is free software; you can redistribute it
+ * and/or modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * The GNU LIBICONV Library is distributed in the hope that it will be
+ * useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with the GNU LIBICONV Library; see the file COPYING.LIB.
+ * If not, write to the Free Software Foundation, Inc., 51 Franklin Street,
+ * Fifth Floor, Boston, MA 02110-1301, USA.
+ */
+
+/*
+ * JOHAB
+ */
+
+/*
+   Conversion between JOHAB codes (s1,s2) and KSX1001 codes (c1,c2):
+   Example. (s1,s2) = 0xD931, (c1,c2) = 0x2121.
+            (s1,s2) = 0xDEF1, (c1,c2) = 0x2C71.
+            (s1,s2) = 0xE031, (c1,c2) = 0x4A21.
+            (s1,s2) = 0xF9FE, (c1,c2) = 0x7D7E.
+   0xD9 <= s1 <= 0xDE || 0xE0 <= s1 <= 0xF9,
+   0x31 <= s2 <= 0x7E || 0x91 <= s2 <= 0xFE,
+   0x21 <= c1 <= 0x2C || 0x4A <= c1 <= 0x7D,
+   0x21 <= c2 <= 0x7E.
+   Invariant:
+     94*(s1 < 0xE0 ? 2*s1-0x1B2 : 2*s1-0x197) + (s2 < 0x91 ? s2-0x31 : s2-0x43)
+     = 94*(c1-0x21)+(c2-0x21)
+   Conversion (s1,s2) -> (c1,c2):
+     t1 := (s1 < 0xE0 ? 2*s1-0x1B2 : 2*s1-0x197)
+     t2 := (s2 < 0x91 ? s2-0x31 : s2-0x43)
+     c1 := t1 + (t2 < 0x5E ? 0 : 1) + 0x21
+     c2 := (t2 < 0x5E ? t2 : t2-0x5E) + 0x21
+   Conversion (c1,c2) -> (s1,s2):
+     t := (c1 < 0x4A ? (c1-0x21+0x1B2) : (c1-0x21+0x197))
+     s1 := t >> 1
+     t2 := (t & 1) * 0x5E + (c2 - 0x21)
+     s2 := (t2 < 0x4E ? t2+0x31 : t2+0x43)
+ */
+
+static int
+johab_mbtowc (conv_t conv, ucs4_t *pwc, const unsigned char *s, int n)
+{
+  unsigned char c = *s;
+  if (c < 0x80) {
+    if (c == 0x5c)
+      *pwc = (ucs4_t) 0x20a9;
+    else
+      *pwc = (ucs4_t) c;
+    return 1;
+  } else if (c < 0xd8) {
+    return johab_hangul_mbtowc(conv,pwc,s,n);
+  } else {
+    unsigned char s1, s2;
+    s1 = c;
+    if ((s1 >= 0xd9 && s1 <= 0xde) || (s1 >= 0xe0 && s1 <= 0xf9)) {
+      if (n < 2)
+        return RET_TOOFEW(0);
+      s2 = s[1];
+      if ((s2 >= 0x31 && s2 <= 0x7e) || (s2 >= 0x91 && s2 <= 0xfe)) {
+        /* In KSC 5601, now KS X 1001, the region s1 = 0xDA, 0xA1 <= s2 <= 0xD3
+           contains the 51 Jamo (Hangul letters). But in the Johab encoding,
+           they have been moved to the Hangul section, see
+           johab_hangul_page31. */
+        if (!(s1 == 0xda && (s2 >= 0xa1 && s2 <= 0xd3))) {
+          unsigned char t1 = (s1 < 0xe0 ? 2*(s1-0xd9) : 2*s1-0x197);
+          unsigned char t2 = (s2 < 0x91 ? s2-0x31 : s2-0x43);
+          unsigned char buf[2];
+          buf[0] = t1 + (t2 < 0x5e ? 0 : 1) + 0x21;
+          buf[1] = (t2 < 0x5e ? t2 : t2-0x5e) + 0x21;
+          return ksc5601_mbtowc(conv,pwc,buf,2);
+        }
+      }
+    }
+    return RET_ILSEQ;
+  }
+}
+
+static int
+johab_wctomb (conv_t conv, unsigned char *r, ucs4_t wc, int n)
+{
+  unsigned char buf[2];
+  int ret;
+
+  /* Try ASCII variation. */
+  if (wc < 0x0080 && wc != 0x005c) {
+    *r = wc;
+    return 1;
+  }
+  if (wc == 0x20a9) {
+    *r = 0x5c;
+    return 1;
+  }
+
+  /* Try JOHAB Hangul table before KSC5601 table, because the KSC5601 table
+     contains some (2350 out of 11172) Hangul syllables (rows 0x30XX..0x48XX),
+     and we want the search to return the JOHAB Hangul table entry. */
+
+  /* Try JOHAB Hangul. */
+  ret = johab_hangul_wctomb(conv,buf,wc,2);
+  if (ret != RET_ILUNI) {
+    if (ret != 2) abort();
+    if (n < 2)
+      return RET_TOOSMALL;
+    r[0] = buf[0];
+    r[1] = buf[1];
+    return 2;
+  }
+
+  /* Try KSC5601, now KS X 1001. */
+  ret = ksc5601_wctomb(conv,buf,wc,2);
+  if (ret != RET_ILUNI) {
+    unsigned char c1, c2;
+    if (ret != 2) abort();
+    if (n < 2)
+      return RET_TOOSMALL;
+    c1 = buf[0];
+    c2 = buf[1];
+    if (((c1 >= 0x21 && c1 <= 0x2c) || (c1 >= 0x4a && c1 <= 0x7d))
+        && (c2 >= 0x21 && c2 <= 0x7e)) {
+      unsigned int t = (c1 < 0x4A ? (c1-0x21+0x1B2) : (c1-0x21+0x197));
+      unsigned char t2 = ((t & 1) ? 0x5e : 0) + (c2 - 0x21);
+      r[0] = t >> 1;
+      r[1] = (t2 < 0x4e ? t2+0x31 : t2+0x43);
+      return 2;
+    }
+  }
+
+  return RET_ILUNI;
+}
-- 
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