+ * Revision 1.24 1999-05-26 07:49:12 adam
+ * C++ compilation.
+ *
+ * Revision 1.23 1999/05/15 14:36:37 adam
+ * Updated dictionary. Implemented "compression" of dictionary.
+ *
+ * Revision 1.22 1999/02/02 14:50:23 adam
+ * Updated WIN32 code specific sections. Changed header.
+ *
+ * Revision 1.21 1998/06/24 12:16:12 adam
+ * Support for relations on text operands. Open range support in
+ * DFA module (i.e. [-j], [g-]).
+ *
+ * Revision 1.20 1997/10/27 14:33:03 adam
+ * Moved towards generic character mapping depending on "structure"
+ * field in abstract syntax file. Fixed a few memory leaks. Fixed
+ * bug with negative integers when doing searches with relational
+ * operators.
+ *
+ * Revision 1.19 1997/09/18 08:59:18 adam
+ * Extra generic handle for the character mapping routines.
+ *
+ * Revision 1.18 1997/09/05 15:29:58 adam
+ * Changed prototype for chr_map_input - added const.
+ * Added support for C++, headers uses extern "C" for public definitions.
+ *
+ * Revision 1.17 1996/06/04 10:20:06 adam
+ * Added support for character mapping.
+ *
+ * Revision 1.16 1996/05/24 14:46:04 adam
+ * Added dict_grep_cmap function to define user-mapping in grep lookups.
+ *
+ * Revision 1.15 1996/03/20 09:35:18 adam
+ * Function dict_lookup_grep got extra parameter, init_pos, which marks
+ * from which position in pattern approximate pattern matching should occur.
+ *
+ * Revision 1.14 1996/02/02 13:43:51 adam
+ * The public functions simply use char instead of Dict_char to represent
+ * search strings. Dict_char is used internally only.
+ *
+ * Revision 1.13 1996/01/08 09:09:30 adam
+ * Function dfa_parse got 'const' string argument.
+ *
+ * Revision 1.12 1995/12/11 09:04:48 adam
+ * Bug fix: the lookup/scan/lookgrep didn't handle empty dictionary.
+ *
+ * Revision 1.11 1995/12/06 14:43:02 adam