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, 2 insertions, 0 deletions

diff --git a/lib.c b/lib.c
index 4e60a727..8ba217a8 100644
--- a/lib.c
+++ b/lib.c
@@ -55,6 +55,7 @@
 #include "unwind.h"
 #include "args.h"
 #include "stream.h"
+#include "strudel.h"
 #include "utf8.h"
 #include "filter.h"
 #include "eval.h"
@@ -11704,6 +11705,7 @@ void init(val *stack_bottom)
   arith_init();
   rand_init();
   stream_init();
+  strudel_init();
 #if HAVE_POSIX_SIGS
   sig_init();
 #endif