s/yylex/bgl_undir_lex/g
s/yyerror/bgl_undir_error/g
s/yylval/bgl_undir_lval/g
s/yychar/bgl_undir_char/g
s/yydebug/bgl_undir_debug/g
s/yynerrs/bgl_undir_nerrs/g
s/yyin/bgl_undir_in/g
s/yyout/bgl_undir_out/g
s/yy_create_buffer/bgl_undir_create_buffer/g
s/yy_load_buffer_state/bgl_undir_load_buffer_state/g
s/yyrestart/bgl_undir_restart/g
s/yy_init_buffer/bgl_undir_init_buffer/g
s/yy_switch_to_buffer/bgl_undir_switch_to_buffer/g
s/yy_delete_buffer/bgl_undir_delete_buffer/g
s/yy_flush_buffer/bgl_undir_flush_buffer/g
s/yy_scan_buffer/bgl_undir_scan_buffer/g
s/yy_scan_string/bgl_undir_scan_string/g
s/yy_scan_bytes/bgl_undir_scan_bytes/g
s/yyleng/bgl_undir_leng/g
s/yytext/bgl_undir_text/g
