These two files don't do much at the moment. I'm hoping someone else might

take these and run with them.  I'm sick of looking at them.


SVN revision: 2383

2 files changed, 343 insertions, 0 deletions

diff --git a/src/encoding.c b/src/encoding.c
new file mode 100644
index 0000000..707df9e
--- /dev/null
+++ b/src/encoding.c
@@ -0,0 +1,279 @@
+/*
+ * Copyright (C) 1997-2000, Michael Jennings
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to
+ * deal in the Software without restriction, including without limitation the
+ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+ * sell copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies of the Software, its documentation and marketing & publicity
+ * materials, and acknowledgment shall be given in the documentation, materials
+ * and software packages that this Software was used.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+ * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+static const char cvs_ident[] = "$Id$";
+
+#include "config.h"
+#include "feature.h"
+
+#include <stdlib.h>
+#include <unistd.h>
+#include <errno.h>
+#include <limits.h>
+
+#include "../libmej/debug.h"
+#include "../libmej/mem.h"
+#include "../libmej/strings.h"
+#include "debug.h"
+#include "command.h"
+#include "encoding.h"
+#include "startup.h"
+#include "options.h"
+#include "screen.h"
+#include "term.h"
+#include "windows.h"
+
+enc_context_t *encoder = NULL;
+static enc_context_t builtin_context_cyrillic, builtin_context_greek_elot_928, builtin_context_greek_ibm_437;
+
+static trans_table_t in_table_iso_8859_5 = {
+  0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,
+
+  0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,
+
+  0x80, 0x81, 0x82, 0x83,  0x84, 0x85, 0x86, 0x87,  0x88, 0x89, 0x8a, 0x8b,  0x8c, 0x8d, 0x8e, 0x8f,
+  0x90, 0x91, 0x92, 0x93,  0x94, 0x95, 0x96, 0x97,  0x98, 0x99, 0x9a, 0x9b,  0x9c, 0x9d, 0x9e, 0x9f,
+  0xa0, 0xae, 0xfe, 0xf1,  0x20, 0xb3, 0x20, 0xfd,  0xa1, 0x20, 0xa4, 0x8b,  0x20, 0x20, 0x20, 0xa7,
+  0x20, 0x20, 0xa6, 0xa1,  0xd3, 0x20, 0x20, 0x20,  0xf1, 0xf0, 0xf4, 0x9b,  0xf8, 0xa5, 0xf5, 0xf7,
+                                                    
+  0xee, 0xd0, 0xd1, 0xe6,  0xd4, 0xd5, 0xe4, 0xd3,  0xe5, 0xd8, 0xd9, 0xda,  0xdb, 0xdc, 0xdd, 0xde,
+  0xdf, 0xef, 0xe0, 0xe1,  0xe2, 0xe3, 0xd6, 0xd2,  0xec, 0xeb, 0xd7, 0xe8,  0xed, 0xe9, 0xe7, 0xea,
+  0xce, 0xb0, 0xb1, 0xc6,  0xb4, 0xb5, 0xc4, 0xb3,  0xc5, 0xb8, 0xb9, 0xba,  0xbb, 0xbc, 0xbd, 0xbe,
+  0xbf, 0xcf, 0xc0, 0xc1,  0xc2, 0xc3, 0xb6, 0xb2,  0xcc, 0xcb, 0xb7, 0xc8,  0xcd, 0xc9, 0xc7, 0xca
+};
+                                                    
+static trans_table_t out_table_iso_8859_5 = {
+  0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,
+
+  0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,
+
+  0x80, 0x81, 0x82, 0x83,  0x84, 0x85, 0x86, 0x87,  0x88, 0x89, 0x8a, 0x8b,  0x8c, 0x8d, 0x8e, 0x8f,
+  0x90, 0x91, 0x92, 0x93,  0x94, 0x95, 0x96, 0x97,  0x98, 0x99, 0x9a, 0x9b,  0x9c, 0x9d, 0x9e, 0x9f,
+  0xa0, 0xb3, 0x80, 0x81,  0xaa, 0xbd, 0xb2, 0xaf,  0x4a, 0x8a, 0x8c, 0x8e,  0x8d, 0x20, 0xa1, 0x8f,
+  0xe1, 0xe2, 0xf7, 0xe7,  0xe4, 0xe5, 0xf6, 0xfa,  0xe9, 0xea, 0xeb, 0xec,  0xed, 0xee, 0xef, 0xf0,
+                                                    
+  0xf2, 0xf3, 0xf4, 0xf5,  0xe6, 0xe8, 0xe3, 0xfe,  0xfb, 0xfd, 0xff, 0xf9,  0xf8, 0xfc, 0xe0, 0xf1,
+  0xc1, 0xc2, 0xd7, 0xc7,  0xc4, 0xc5, 0xd6, 0xda,  0xc9, 0xca, 0xcb, 0xcc,  0xcd, 0xce, 0xcf, 0xd0,
+  0xd2, 0xd3, 0xd4, 0xd5,  0xc6, 0xc8, 0xc3, 0xde,  0xdb, 0xdd, 0xdf, 0xd9,  0xd8, 0xdc, 0xc0, 0xd1,
+  0xb9, 0xa3, 0x90, 0x83,  0xba, 0xbe, 0x69, 0xbf,  0xbc, 0x9a, 0x9c, 0x9e,  0x9d, 0xa7, 0xa2, 0x9f
+};
+
+static trans_table_t in_table_windows_1251 = {
+  0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,
+
+  0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,
+
+  0x80, 0x81, 0x82, 0x83,  0x84, 0x85, 0x86, 0x87,  0x88, 0x89, 0x8a, 0x8b,  0x8c, 0x8d, 0x8e, 0x8f,
+  0x90, 0x91, 0x92, 0x93,  0x94, 0x95, 0x96, 0x97,  0x98, 0x99, 0x9a, 0x9b,  0x9c, 0x9d, 0x9e, 0x9f,
+  0xa0, 0xa1, 0xa2, 0xb8,  0xa4, 0xa5, 0xa6, 0xa7,  0x22, 0xa9, 0x20, 0x22,  0x5e, 0x2d, 0xae, 0x7e,
+  0xb0, 0xb1, 0x20, 0xa8,  0x27, 0xb5, 0xb6, 0xb7,  0x2c, 0x20, 0x20, 0x22,  0x20, 0x20, 0x20, 0xd7,
+                                                    
+  0xfe, 0xe0, 0xe1, 0xf6,  0xe4, 0xe5, 0xf4, 0xe3,  0xf5, 0xe8, 0xe9, 0xea,  0xeb, 0xec, 0xed, 0xee,
+  0xef, 0xff, 0xf0, 0xf1,  0xf2, 0xf3, 0xe6, 0xe2,  0xfc, 0xfb, 0xe7, 0xf8,  0xfd, 0xf9, 0xf7, 0xfa,
+  0xde, 0xc0, 0xc1, 0xd6,  0xc4, 0xc5, 0xd4, 0xc3,  0xd5, 0xc8, 0xc9, 0xca,  0xcb, 0xcc, 0xcd, 0xce,
+  0xcf, 0xdf, 0xd0, 0xd1,  0xd2, 0xd3, 0xc6, 0xc2,  0xdc, 0xdb, 0xc7, 0xd8,  0xdd, 0xd9, 0xd7, 0xda
+};
+                                                    
+static trans_table_t out_table_windows_1251 = {
+  0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,
+
+  0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,
+
+  0x80, 0x81, 0x82, 0x83,  0x84, 0x85, 0x86, 0x87,  0x88, 0x89, 0x8a, 0x8b,  0x8c, 0x8d, 0x8e, 0x8f,
+  0x90, 0x91, 0x92, 0x93,  0x94, 0x95, 0x96, 0x97,  0x98, 0x99, 0x9a, 0x9b,  0x9c, 0x9d, 0x9e, 0x9f,
+  0xa0, 0xa1, 0xa2, 0x4a,  0xa4, 0xe7, 0x7c, 0xa7,  0xb3, 0xa9, 0xe5, 0x22,  0x5e, 0x2d, 0xae, 0x49,
+  0xb0, 0xb1, 0x49, 0x69,  0xc7, 0xb5, 0xb6, 0xb7,  0xa3, 0x4e, 0xc5, 0x22,  0x6a, 0x53, 0x73, 0xc0,
+                                                    
+  0xe1, 0xe2, 0xf7, 0xe7,  0xe4, 0xe5, 0xf6, 0xfa,  0xe9, 0xea, 0xeb, 0xec,  0xed, 0xee, 0xef, 0xf0,
+  0xf2, 0xf3, 0xf4, 0xf5,  0xe6, 0xe8, 0xe3, 0xfe,  0xfb, 0xfd, 0xff, 0xf9,  0xf8, 0xfc, 0xe0, 0xf1,
+  0xc1, 0xc2, 0xd7, 0xc7,  0xc4, 0xc5, 0xd6, 0xda,  0xc9, 0xca, 0xcb, 0xcc,  0xcd, 0xce, 0xcf, 0xd0,
+  0xd2, 0xd3, 0xd4, 0xd5,  0xc6, 0xc8, 0xc3, 0xde,  0xdb, 0xdd, 0xdf, 0xd9,  0xd8, 0xdc, 0xc0, 0xd1
+};
+                                                    
+                                                    
+static trans_table_t in_table_alt_866 = {
+  0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,
+
+  0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,
+
+  0x20, 0x20, 0x20, 0x20,  0x20, 0x20, 0x20, 0x20,  0x20, 0x20, 0x20, 0x20,  0x20, 0x20, 0x20, 0x20,
+  0x20, 0x20, 0x20, 0x20,  0x20, 0xf9, 0x2d, 0x2d,  0x20, 0x20, 0x20, 0x20,  0x20, 0x20, 0xfa, 0x20,
+  0x20, 0x20, 0x20, 0xf1,  0xf5, 0x20, 0x69, 0xf9,  0x20, 0x20, 0x20, 0x20,  0x20, 0x20, 0x20, 0x20,
+  0x20, 0x20, 0x20, 0xf0,  0xf4, 0x20, 0x49, 0xf8,  0x20, 0xfc, 0x20, 0x20,  0x20, 0x20, 0x20, 0x20,
+                                                    
+  0xee, 0xa0, 0xa1, 0xe6,  0xa4, 0xa5, 0xe4, 0xa3,  0xe5, 0xa8, 0xa9, 0xaa,  0xab, 0xac, 0xad, 0xae,
+  0xaf, 0xef, 0xe0, 0xe1,  0xe2, 0xe3, 0xa6, 0xa2,  0xec, 0xeb, 0xa7, 0xe8,  0xed, 0xe9, 0xe7, 0xea,
+  0x9e, 0x80, 0x81, 0x96,  0x84, 0x85, 0x94, 0x83,  0x95, 0x88, 0x89, 0x8a,  0x8b, 0x8c, 0x8d, 0x8e,
+  0x8f, 0x9f, 0x90, 0x91,  0x92, 0x93, 0x86, 0x82,  0x9c, 0x9b, 0x87, 0x98,  0x9d, 0x99, 0x97, 0x9a
+};
+                                                    
+static trans_table_t out_table_alt_866 = {
+  0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,
+
+  0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,
+
+  0xe1, 0xe2, 0xf7, 0xe7,  0xe4, 0xe5, 0xf6, 0xfa,  0xe9, 0xea, 0xeb, 0xec,  0xed, 0xee, 0xef, 0xf0,
+  0xf2, 0xf3, 0xf4, 0xf5,  0xe6, 0xe8, 0xe3, 0xfe,  0xfb, 0xfd, 0xff, 0xf9,  0xf8, 0xfc, 0xe0, 0xf1,
+  0xc1, 0xc2, 0xd7, 0xc7,  0xc4, 0xc5, 0xd6, 0xda,  0xc9, 0xca, 0xcb, 0xcc,  0xcd, 0xce, 0xcf, 0xd0,
+  0x02, 0x02, 0x02, 0x19,  0x16, 0x16, 0x16, 0x0c,  0x0c, 0x16, 0x19, 0x0c,  0x0b, 0x0b, 0x0b, 0x0c,
+                                                    
+  0x0e, 0x17, 0x18, 0x15,  0x12, 0x0f, 0x15, 0x15,  0x0e, 0x0d, 0x17, 0x18,  0x15, 0x12, 0x0f, 0x17,
+  0x17, 0x18, 0x18, 0x0e,  0x0e, 0x0d, 0x0d, 0x0f,  0x0f, 0x0b, 0x0d, 0x00,  0x00, 0x00, 0x00, 0x00,
+  0xd2, 0xd3, 0xd4, 0xd5,  0xc6, 0xc8, 0xc3, 0xde,  0xdb, 0xdd, 0xdf, 0xd9,  0xd8, 0xdc, 0xc0, 0xd1,
+  0xb3, 0xa3, 0x20, 0x20,  0xb4, 0xa4, 0x49, 0x69,  0xb7, 0xa7, 0x20, 0x20,  0xb9, 0x20, 0x20, 0x20
+};
+
+static enc_context_t *
+enc_create_context(const char *id)
+{
+  enc_context_t *tmp;
+
+  tmp = (enc_context_t *) MALLOC(sizeof(enc_context_t));
+  MEMSET(tmp, 0, sizeof(enc_context_t));
+  tmp->id = StrDup(id);
+  return tmp;
+}
+
+static void
+enc_context_add_state(enc_context_t *context, enc_state_t *state)
+{
+  ASSERT(context != NULL);
+  ASSERT(state != NULL);
+
+  state->next = context->states;
+  context->states = state;
+}
+
+static enc_state_t *
+enc_create_state(const char *id, unsigned char lifetime)
+{
+  enc_state_t *tmp;
+
+  tmp = (enc_state_t *) MALLOC(sizeof(enc_state_t));
+  MEMSET(tmp, 0, sizeof(enc_state_t));
+  tmp->id = StrDup(id);
+  tmp->lifetime = lifetime;
+  return tmp;
+}
+
+static void
+enc_state_add_switch(enc_state_t *state, unsigned char key, enc_state_t *next_state)
+{
+  state_switch_t *stsw;
+
+  stsw = (state_switch_t *) MALLOC(sizeof(state_switch_t));
+  stsw->key = key;
+  stsw->next_state = next_state;
+  stsw->next = state->switches;
+  state->switches = stsw;
+}
+
+static void
+enc_state_set_in_table(enc_state_t *state, trans_table_t in_tbl)
+{
+  ASSERT(state != NULL);
+  state->in_tbl = in_tbl;
+}
+
+static void
+enc_state_set_out_table(enc_state_t *state, trans_table_t out_tbl)
+{
+  ASSERT(state != NULL);
+  state->out_tbl = out_tbl;
+}
+
+void
+enc_init(void)
+{
+
+}
+
+static void
+enc_init_builtins(void)
+{
+  enc_state_t *st;
+  state_switch_t *stsw;
+
+  builtin_context_cyrillic.id = "Cyrillic";
+  st = enc_create_state("alt-866", 0);
+  enc_state_set_in_table(st, in_table_alt_866);
+  enc_state_set_out_table(st, out_table_alt_866);
+  enc_context_add_state(&builtin_context_cyrillic, st);
+  builtin_context_cyrillic.current = st;
+
+  st = enc_create_state("windows-1251", 0);
+  enc_state_set_in_table(st, in_table_windows_1251);
+  enc_state_set_out_table(st, out_table_windows_1251);
+  enc_state_add_switcher(st, 0x0f, builtin_context_cyrillic.current);
+  enc_context_add_state(&builtin_context_cyrillic, st);
+  builtin_context_cyrillic.current = st;
+
+  st = enc_create_state("iso-8859-5", 0);
+  enc_state_set_in_table(st, in_table_iso_8859_5);
+  enc_state_set_out_table(st, out_table_iso_8859_5);
+  enc_state_add_switcher(st, 0x0f, builtin_context_cyrillic.current);
+  enc_context_add_state(&builtin_context_cyrillic, st);
+  builtin_context_cyrillic.current = st;
+
+  st = enc_create_state("koi8-r", 0);
+  enc_state_add_switcher(st, 0x0f, builtin_context_cyrillic.current);
+  enc_context_add_state(&builtin_context_cyrillic, st);
+  builtin_context_cyrillic.current = st;
+
+}
diff --git a/src/encoding.h b/src/encoding.h
new file mode 100644
index 0000000..e4822ad
--- /dev/null
+++ b/src/encoding.h
@@ -0,0 +1,64 @@
+/*
+ * Copyright (C) 1997-2000, Michael Jennings
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to
+ * deal in the Software without restriction, including without limitation the
+ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+ * sell copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies of the Software, its documentation and marketing & publicity
+ * materials, and acknowledgment shall be given in the documentation, materials
+ * and software packages that this Software was used.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+ * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#ifndef _ENCODING_H
+# define _ENCODING_H
+
+# include <X11/Xfuncproto.h>
+
+/************ Macros and Definitions ************/
+#define ENC_US_ASCII         0UL
+#define ENC_GREEK_ELOT_928   1UL
+#define ENC_GREEK_IBM_437    2UL
+#define ENC_CYRILLIC         3UL
+#define ENC_USERDEF          255
+
+/************ Structures ************/
+typedef unsigned char trans_tbl_t[256];
+typedef struct state_switch_struct {
+  unsigned char key;
+  unsigned char next_state;
+  struct state_switch_struct *next;
+} state_switch_t;
+typedef struct enc_state_struct {
+  char *id;
+  trans_tbl_t in_tbl, out_tbl;
+  state_switch_t *switches;
+  unsigned char lifetime:4, life_left:4;
+  struct enc_state_struct *next;
+} enc_state_t;
+typedef struct enc_context_struct {
+  char *id;
+  enc_state_t *states, *current, *prev;
+} enc_context_t;
+
+/************ Variables ************/
+extern enc_context_t *encoder;
+
+/************ Function Prototypes ************/
+_XFUNCPROTOBEGIN
+
+
+_XFUNCPROTOEND
+
+#endif	/* _ENCODING_H */