From 8d3fc864d094eeadc721f8e93436b37a5fab173e Mon Sep 17 00:00:00 2001
From: "Roberto C. Sanchez" <roberto@connexer.com>
Date: Sat, 29 Mar 2014 10:53:33 -0400
Subject: Imported Upstream version 1.5.3

---
 src/modules/filters/utf8utf16.cpp | 79 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 79 insertions(+)
 create mode 100644 src/modules/filters/utf8utf16.cpp

(limited to 'src/modules/filters/utf8utf16.cpp')

diff --git a/src/modules/filters/utf8utf16.cpp b/src/modules/filters/utf8utf16.cpp
new file mode 100644
index 0000000..9aea6fe
--- /dev/null
+++ b/src/modules/filters/utf8utf16.cpp
@@ -0,0 +1,79 @@
+/******************************************************************************
+ *
+ * UTF8UTF16 -	SWFilter decendant to convert UTF-8 to UTF-16
+ *
+ */
+
+#include <stdlib.h>
+#include <stdio.h>
+
+#include <utf8utf16.h>
+
+UTF8UTF16::UTF8UTF16() {
+}
+
+
+char UTF8UTF16::ProcessText(char *text, int maxlen, const SWKey *key, const SWModule *module)
+{
+  unsigned char *from;
+  unsigned short *to;
+
+  int len;
+  unsigned long uchar;
+  unsigned char significantFirstBits, subsequent;
+  unsigned short schar;
+  
+  len = strlen(text) + 1;						// shift string to right of buffer
+  if (len < maxlen) {
+    memmove(&text[maxlen - len], text, len);
+    from = (unsigned char*)&text[maxlen - len];
+  }
+  else
+    from = (unsigned char*)text;
+  
+  
+  // -------------------------------
+  
+  for (to = (unsigned short*)text; *from; from++) {
+    uchar = 0;
+    if ((*from & 128) != 128) {
+      //          	if (*from != ' ')
+      uchar = *from;
+    }
+    else if ((*from & 128) && ((*from & 64) != 64)) {
+      // error, do nothing
+      continue;
+    }
+    else {
+      *from <<= 1;
+      for (subsequent = 1; (*from & 128); subsequent++) {
+	*from <<= 1;
+	from[subsequent] &= 63;
+	uchar <<= 6;
+	uchar |= from[subsequent];
+      }
+      subsequent--;
+      *from <<=1;
+      significantFirstBits = 8 - (2+subsequent);
+      
+      uchar |= (((short)*from) << (((6*subsequent)+significantFirstBits)-8));
+      from += subsequent;
+    }
+
+    if (uchar < 0x1ffff) {
+      *to++ = (unsigned short)uchar;
+    }
+    else {
+      uchar -= 0x10000;
+      schar = 0xD800 | (uchar & 0x03ff);
+      uchar >>= 10;
+      uchar |= 0xDC00;
+      *to++ = (unsigned short)schar;
+      *to++ = (unsigned short)uchar;
+    }
+  }
+  *to = (unsigned short)0;
+
+  return 0;
+}
+
-- 
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