Added support for symbol codepage.
Improved handling of undefined codepage characters.

diff --git a/unicode/c_1255.c b/unicode/c_1255.c
index aa32b32..6b8f16b 100644
--- a/unicode/c_1255.c
+++ b/unicode/c_1255.c
@@ -31,13 +31,13 @@
     0x00b0, 0x00b1, 0x00b2, 0x00b3, 0x00b4, 0x00b5, 0x00b6, 0x00b7,
     0x00b8, 0x00b9, 0x00f7, 0x00bb, 0x00bc, 0x00bd, 0x00be, 0x00bf,
     0x05b0, 0x05b1, 0x05b2, 0x05b3, 0x05b4, 0x05b5, 0x05b6, 0x05b7,
-    0x05b8, 0x05b9, 0x00ca, 0x05bb, 0x05bc, 0x05bd, 0x05be, 0x05bf,
+    0x05b8, 0x05b9, 0x003f, 0x05bb, 0x05bc, 0x05bd, 0x05be, 0x05bf,
     0x05c0, 0x05c1, 0x05c2, 0x05c3, 0x05f0, 0x05f1, 0x05f2, 0x05f3,
-    0x05f4, 0x00d9, 0x00da, 0x00db, 0x00dc, 0x00dd, 0x00de, 0x00df,
+    0x05f4, 0x003f, 0x003f, 0x003f, 0x003f, 0x003f, 0x00de, 0x00df,
     0x05d0, 0x05d1, 0x05d2, 0x05d3, 0x05d4, 0x05d5, 0x05d6, 0x05d7,
     0x05d8, 0x05d9, 0x05da, 0x05db, 0x05dc, 0x05dd, 0x05de, 0x05df,
     0x05e0, 0x05e1, 0x05e2, 0x05e3, 0x05e4, 0x05e5, 0x05e6, 0x05e7,
-    0x05e8, 0x05e9, 0x05ea, 0x00fb, 0x00fc, 0x200e, 0x200f, 0x00ff
+    0x05e8, 0x05e9, 0x05ea, 0x003f, 0x003f, 0x200e, 0x200f, 0x003f
 };
 
 static const unsigned char uni2cp_low[4608] =
@@ -68,13 +68,13 @@
     0xb0, 0xb1, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6, 0xb7,
     0xb8, 0xb9, 0x6f, 0xbb, 0xbc, 0xbd, 0xbe, 0xbf,
     0x41, 0x41, 0x41, 0x41, 0x41, 0x41, 0x41, 0x43,
-    0x45, 0x45, 0xca, 0x45, 0x49, 0x49, 0x49, 0x49,
+    0x45, 0x45, 0x45, 0x45, 0x49, 0x49, 0x49, 0x49,
     0x44, 0x4e, 0x4f, 0x4f, 0x4f, 0x4f, 0x4f, 0xaa,
-    0x4f, 0xd9, 0xda, 0xdb, 0xdc, 0xdd, 0xde, 0xdf,
+    0x4f, 0x55, 0x55, 0x55, 0x55, 0x59, 0xde, 0xdf,
     0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x63,
     0x65, 0x65, 0x65, 0x65, 0x69, 0x69, 0x69, 0x69,
     0x64, 0x6e, 0x6f, 0x6f, 0x6f, 0x6f, 0x6f, 0xba,
-    0x6f, 0x75, 0x75, 0xfb, 0xfc, 0x79, 0x3f, 0xff,
+    0x6f, 0x75, 0x75, 0x75, 0x75, 0x79, 0x3f, 0x79,
     /* 0x0100 .. 0x01ff */
     0x41, 0x61, 0x41, 0x61, 0x41, 0x61, 0x43, 0x63,
     0x43, 0x63, 0x43, 0x63, 0x43, 0x63, 0x44, 0x64,
@@ -102,8 +102,8 @@
     0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f,
     0x7c, 0x3f, 0x3f, 0x21, 0x3f, 0x3f, 0x3f, 0x3f,
     0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x41, 0x61, 0x49,
-    0x69, 0x4f, 0x6f, 0x55, 0x75, 0xdc, 0xfc, 0xdc,
-    0xfc, 0xdc, 0xfc, 0xdc, 0xfc, 0x3f, 0x41, 0x61,
+    0x69, 0x4f, 0x6f, 0x55, 0x75, 0x55, 0x75, 0x55,
+    0x75, 0x55, 0x75, 0x55, 0x75, 0x3f, 0x41, 0x61,
     0x41, 0x61, 0x41, 0x61, 0x47, 0x67, 0x47, 0x67,
     0x4b, 0x6b, 0x4f, 0x6f, 0x4f, 0x6f, 0x3f, 0x3f,
     0x6a, 0x3f, 0x3f, 0x3f, 0x47, 0x67, 0x3f, 0x3f,
@@ -164,11 +164,11 @@
     0x3f, 0x49, 0x4b, 0x3f, 0x4d, 0x4e, 0x3f, 0x4f,
     0x3f, 0x50, 0x3f, 0x3f, 0x54, 0x59, 0x3f, 0x58,
     0x3f, 0x3f, 0x49, 0x59, 0x3f, 0x3f, 0x3f, 0x3f,
-    0x3f, 0x3f, 0xdf, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f,
+    0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f,
     0x3f, 0x3f, 0x3f, 0x3f, 0xb5, 0x3f, 0x3f, 0x3f,
     0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f,
     0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f,
-    0xdf, 0x3f, 0x59, 0x59, 0x59, 0x3f, 0x3f, 0x3f,
+    0x3f, 0x3f, 0x59, 0x59, 0x59, 0x3f, 0x3f, 0x3f,
     0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f,
     0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f,
     0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f,
@@ -231,8 +231,8 @@
     0x41, 0x61, 0x41, 0x61, 0x41, 0x61, 0x41, 0x61,
     0x41, 0x61, 0x41, 0x61, 0x41, 0x61, 0x41, 0x61,
     0x41, 0x61, 0x41, 0x61, 0x41, 0x61, 0x41, 0x61,
-    0x45, 0x65, 0x45, 0x65, 0x45, 0x65, 0xca, 0x65,
-    0xca, 0x65, 0xca, 0x65, 0xca, 0x65, 0x45, 0x65,
+    0x45, 0x65, 0x45, 0x65, 0x45, 0x65, 0x45, 0x65,
+    0x45, 0x65, 0x45, 0x65, 0x45, 0x65, 0x45, 0x65,
     0x49, 0x69, 0x49, 0x69, 0x4f, 0x6f, 0x4f, 0x6f,
     0x4f, 0x6f, 0x4f, 0x6f, 0x4f, 0x6f, 0x4f, 0x6f,
     0x4f, 0x6f, 0x4f, 0x6f, 0x4f, 0x6f, 0x4f, 0x6f,