1 files changed, 139 insertions, 0 deletions
diff --git a/src/utilfuns/swunicod.cpp b/src/utilfuns/swunicod.cpp
new file mode 100644
index 0000000..f42fd86
--- /dev/null
+++ b/src/utilfuns/swunicod.cpp
@@ -0,0 +1,139 @@
+/*
+ *
+ * Copyright 1998 CrossWire Bible Society (http://www.crosswire.org)
+ *      CrossWire Bible Society
+ *      P. O. Box 2528
+ *      Tempe, AZ  85280-2528
+ *
+ * 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 version 2.
+ *
+ * This program 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
+ * General Public License for more details.
+ *
+ */
+
+#include "swunicod.h"
+unsigned char* UTF32to8 (unsigned long utf32, unsigned char * utf8) {
+  unsigned int i;
+  for (i = 0; i < 6; i++) utf8[i] = 0;
+
+  if (utf32 < 0x80) {
+    utf8[0] = (char)utf32;
+  }
+  else if (utf32 < 0x800) {
+    i = utf32 & 0x3f;
+    utf8[1] = 0x80 | i;
+    utf32 >>= 6;
+   
+    i = utf32 & 0x1f;
+    utf8[0] = 0xc0 | i;
+  }
+  else if (utf32 < 0x10000) {
+    i = utf32 & 0x3f;
+    utf8[2] = 0x80 | i;
+    utf32 >>= 6;
+
+    i = utf32 & 0x3f;
+    utf8[1] = 0x80 | i;
+    utf32 >>= 6;
+   
+    i = utf32 & 0x0f;
+    utf8[0] = 0xe0 | i;
+  }
+  else if (utf32 < 0x200000) {
+    i = utf32 & 0x3f;
+    utf8[3] = 0x80 | i;
+    utf32 >>= 6;
+
+    i = utf32 & 0x3f;
+    utf8[2] = 0x80 | i;
+    utf32 >>= 6;
+
+    i = utf32 & 0x3f;
+    utf8[1] = 0x80 | i;
+    utf32 >>= 6;
+   
+    i = utf32 & 0x07;
+    utf8[0] = 0xf0 | i;
+  }
+  else if (utf32 < 0x4000000) {
+    i = utf32 & 0x3f;
+    utf8[4] = 0x80 | i;
+    utf32 >>= 6;
+
+    i = utf32 & 0x3f;
+    utf8[3] = 0x80 | i;
+    utf32 >>= 6;
+
+    i = utf32 & 0x3f;
+    utf8[2] = 0x80 | i;
+    utf32 >>= 6;
+
+    i = utf32 & 0x3f;
+    utf8[1] = 0x80 | i;
+    utf32 >>= 6;
+   
+    i = utf32 & 0x03;
+    utf8[0] = 0xf8 | i;
+  }
+  else if (utf32 < 0x80000000) {
+    i = utf32 & 0x3f;
+    utf8[5] = 0x80 | i;
+    utf32 >>= 6;
+
+    i = utf32 & 0x3f;
+    utf8[4] = 0x80 | i;
+    utf32 >>= 6;
+
+    i = utf32 & 0x3f;
+    utf8[3] = 0x80 | i;
+    utf32 >>= 6;
+
+    i = utf32 & 0x3f;
+    utf8[2] = 0x80 | i;
+    utf32 >>= 6;
+
+    i = utf32 & 0x3f;
+    utf8[1] = 0x80 | i;
+    utf32 >>= 6;
+   
+    i = utf32 & 0x01;
+    utf8[0] = 0xfc | i;
+  }
+  return utf8;
+}
+
+/** Converts a UTF-8 encoded 1-6 byte array into a 32-bit unsigned integer UTF-32 value
+ * @param utf8 pointer to an array of 6 unsigned chars containing the UTF-8 value, starting in the utf8[0]
+ * @param utf32 the UTF-32 Unicode code point value
+ */
+unsigned long UTF8to32 (unsigned char * utf8) {
+
+  unsigned char i = utf8[0];
+  unsigned char count;
+  unsigned long utf32 = 0;
+
+  for (count = 0; i & 0x80; count++) i <<= 1;
+  if (!count) {
+    return utf8[0];
+  }
+  else if (count == 1) {
+    return 0xffff;
+  }
+  else {
+    count--;
+    utf32 = i >> count;
+    for (i = 1; i <= count; i++) {
+      if (0xc0 & utf8[i] != 0x80) {
+	return  0xffff;
+      }
+      utf32 <<= 6;
+      utf32 |= (utf8[i] & 0x3f);
+    }
+  }
+  return utf32;
+}