1 files changed, 102 insertions, 0 deletions
diff --git a/src/utf8.cc b/src/utf8.cc
new file mode 100644
index 00000000..0138c616
--- /dev/null
+++ b/src/utf8.cc
@@ -0,0 +1,102 @@
+/*
+ * File: utf8.c
+ *
+ * Copyright (C) 2009 Jorge Arellano Cid <jcid@dillo.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ */
+
+#include <fltk/utf.h>
+
+#include "../dlib/dlib.h"    /* TRUE/FALSE */
+#include "utf8.hh"
+
+// C++ functions with C linkage ----------------------------------------------
+
+/*
+ * Return index of the last byte of the UTF-8-encoded character that str + i
+ * points to or into.
+ */
+uint_t a_Utf8_end_of_char(const char *str, uint_t i)
+{
+   /* We can almost get what we want from utf8fwd(p+1,...)-1, but that
+    * does not work for the last character in a string, and the fn makes some
+    * assumptions that do not suit us.
+    * Here's something very simpleminded instead:
+    */
+   if (str && *str && (str[i] & 0x80)) {
+      int internal_bytes = (str[i] & 0x40) ? 0 : 1;
+
+      while (((str[i + 1] & 0xc0) == 0x80) && (++internal_bytes < 4))
+         i++;
+   }
+   return i;
+}
+
+/*
+ * Decode a single UTF-8-encoded character starting at p.
+ * The resulting Unicode value (in the range 0-0x10ffff) is returned,
+ * and len is set to the number of bytes in the UTF-8 encoding.
+ * Note that utf8decode(), if given non-UTF-8 data, will interpret
+ * it as ISO-8859-1 or CP1252 if possible.
+ */
+uint_t a_Utf8_decode(const char* str, const char* end, int* len)
+{
+   return utf8decode(str, end, len);
+}
+
+/*
+ * Write UTF-8 encoding of ucs into buf and return number of bytes written.
+ */
+int a_Utf8_encode(unsigned int ucs, char *buf)
+{
+   return utf8encode(ucs, buf);
+}
+
+/*
+ * Examine first srclen bytes of src.
+ * Return 0 if not legal UTF-8, 1 if all ASCII, 2 if all below 0x800,
+ * 3 if all below 0x10000, and 4 otherwise.
+ */
+int a_Utf8_test(const char* src, unsigned int srclen)
+{
+   return utf8test(src, srclen);
+}
+
+/*
+ * Does s point to a UTF-8-encoded ideographic character?
+ *
+ * This is based on http://unicode.org/reports/tr14/#ID plus some guesses
+ * for what might make the most sense for Dillo. Surprisingly, they include
+ * Hangul Compatibility Jamo, but they're the experts, so I'll follow along.
+ */
+bool_t a_Utf8_ideographic(const char *s, const char *end, int *len)
+{
+   bool_t ret = FALSE;
+
+   if ((uchar_t)*s >= 0xe2) {
+      /* Unicode char >= U+2000. */
+      unsigned unicode = a_Utf8_decode(s, end, len);
+
+      if (unicode >= 0x2e80 &&
+           ((unicode <= 0xa4cf) ||
+            (unicode >= 0xf900 && unicode <= 0xfaff) ||
+            (unicode >= 0xff00 && unicode <= 0xff9f))) {
+         ret = TRUE;
+     }
+   } else {
+      *len = 1 + (int)a_Utf8_end_of_char(s, 0);
+   }
+   return ret;
+}
+
+bool_t a_Utf8_combining_char(int unicode)
+{
+   return ((unicode >= 0x0300 && unicode <= 0x036f) ||
+           (unicode >= 0x1dc0 && unicode <= 0x1dff) ||
+           (unicode >= 0x20d0 && unicode <= 0x20ff) ||
+           (unicode >= 0xfe20 && unicode <= 0xfe2f));
+}