New feature: structure delegate streams.

A new kind of stream object which redirects its operations to
the methods of a structure.

* Makefile (OBJS): New object file, strudel.o.

* lib.c (init): Call new strudel_init function.

* lisplib.c (stream_wrap_set_entries,
stream_wrap_instantiate): New static functions.
(lisplib_init): Arrange for autloading of new stream-wrap.tl.

* share/txr/stdlib/stream-wrap.tl: New file.

* stream.c (put_string_s, put_char_s, put_byte_s, get_line_s,
get_char_s, get_byte_s, unget_char_s, unget_byte_s, put_buf_s,
fill_buf_s, flush_s, seek_s, truncate_s, get_prop_s,
set_prop_s, get_error_s, get_error_str_s, clear_error_s,
get_fd_s): New symbol variables.
(stream_init): New symbol variables initialized. Numerous
functions registered via these variables now rather than
intern(...) expressions.

* stream.h (put_string_s, put_char_s, put_byte_s, get_line_s,
get_char_s, get_byte_s, unget_char_s, unget_byte_s, put_buf_s,
fill_buf_s, flush_s, seek_s, truncate_s, get_prop_s,
set_prop_s, get_error_s, get_error_str_s, clear_error_s,
get_fd_s): Declared.

* strudel.c, strudel.h: New files.

1 files changed, 5 insertions, 0 deletions

diff --git a/stream.h b/stream.h
index 17b64aa1..961694a3 100644
--- a/stream.h
+++ b/stream.h
@@ -125,6 +125,11 @@ extern val stdio_stream_s;
 
 extern val stdin_s, stdout_s, stddebug_s, stderr_s, stdnull_s;
 
+extern val put_string_s, put_char_s, put_byte_s, get_line_s, get_char_s;
+extern val get_byte_s, unget_char_s, unget_byte_s, put_buf_s, fill_buf_s;
+extern val close_s, flush_s, seek_s, truncate_s, get_prop_s, set_prop_s;
+extern val get_error_s, get_error_str_s, clear_error_s, get_fd_s;
+
 extern val print_flo_precision_s, print_flo_digits_s, print_flo_format_s;
 extern val pprint_flo_format_s, print_base_s, print_circle_s;