1 files changed, 109 insertions, 0 deletions
diff --git a/MSVC/iconv/utf16.h b/MSVC/iconv/utf16.h
new file mode 100644
index 0000000..55447d7
--- /dev/null
+++ b/MSVC/iconv/utf16.h
@@ -0,0 +1,109 @@
+/*
+ * Copyright (C) 1999-2001 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., 59 Temple Place -
+ * Suite 330, Boston, MA 02111-1307, USA.
+ */
+
+/*
+ * UTF-16
+ */
+
+/* Specification: RFC 2781 */
+
+/* Here we accept FFFE/FEFF marks as endianness indicators everywhere
+   in the stream, not just at the beginning. (This is contrary to what
+   RFC 2781 section 3.2 specifies, but it allows concatenation of byte
+   sequences to work flawlessly, while disagreeing with the RFC behaviour
+   only for strings containing U+FEFF characters, which is quite rare.)
+   The default is big-endian. */
+/* The state is 0 if big-endian, 1 if little-endian. */
+static int
+utf16_mbtowc (conv_t conv, ucs4_t *pwc, const unsigned char *s, int n)
+{
+  state_t state = conv->istate;
+  int count = 0;
+  for (; n >= 2;) {
+    ucs4_t wc = (state ? s[0] + (s[1] << 8) : (s[0] << 8) + s[1]);
+    if (wc == 0xfeff) {
+    } else if (wc == 0xfffe) {
+      state ^= 1;
+    } else if (wc >= 0xd800 && wc < 0xdc00) {
+      if (n >= 4) {
+        ucs4_t wc2 = (state ? s[2] + (s[3] << 8) : (s[2] << 8) + s[3]);
+        if (!(wc2 >= 0xdc00 && wc2 < 0xe000))
+          return RET_ILSEQ;
+        *pwc = 0x10000 + ((wc - 0xd800) << 10) + (wc2 - 0xdc00);
+        conv->istate = state;
+        return count+4;
+      } else
+        break;
+    } else if (wc >= 0xdc00 && wc < 0xe000) {
+      return RET_ILSEQ;
+    } else {
+      *pwc = wc;
+      conv->istate = state;
+      return count+2;
+    }
+    s += 2; n -= 2; count += 2;
+  }
+  conv->istate = state;
+  return RET_TOOFEW(count);
+}
+
+/* We output UTF-16 in big-endian order, with byte-order mark.
+   See RFC 2781 section 3.3 for a rationale: Some document formats
+   mandate a BOM; the file concatenation issue is not so severe as
+   long as the above utf16_mbtowc function is used. */
+/* The state is 0 at the beginning, 1 after the BOM has been written. */
+static int
+utf16_wctomb (conv_t conv, unsigned char *r, ucs4_t wc, int n)
+{
+  if (wc != 0xfffe && !(wc >= 0xd800 && wc < 0xe000)) {
+    int count = 0;
+    if (!conv->ostate) {
+      if (n >= 2) {
+        r[0] = 0xFE;
+        r[1] = 0xFF;
+        r += 2; n -= 2; count += 2;
+      } else
+        return RET_TOOSMALL;
+    }
+    if (wc < 0x10000) {
+      if (n >= 2) {
+        r[0] = (unsigned char) (wc >> 8);
+        r[1] = (unsigned char) wc;
+        conv->ostate = 1;
+        return count+2;
+      } else
+        return RET_TOOSMALL;
+    }
+    else if (wc < 0x110000) {
+      if (n >= 4) {
+        ucs4_t wc1 = 0xd800 + ((wc - 0x10000) >> 10);
+        ucs4_t wc2 = 0xdc00 + ((wc - 0x10000) & 0x3ff);
+        r[0] = (unsigned char) (wc1 >> 8);
+        r[1] = (unsigned char) wc1;
+        r[2] = (unsigned char) (wc2 >> 8);
+        r[3] = (unsigned char) wc2;
+        conv->ostate = 1;
+        return count+4;
+      } else
+        return RET_TOOSMALL;
+    }
+  }
+  return RET_ILUNI;
+}