Date: 2007-08-20 21:37:58 +0200 (Mon, 20 Aug 2007)
New Revision: 570
forth/lib/tofile.fth - Initial checkin
--- forth/lib/tofile.fth (rev 0)
+++ forth/lib/tofile.fth 2007-08-20 19:37:58 UTC (rev 570)
@@ -0,0 +1,97 @@
+purpose: Redirect the output stream.
+\ See license at end of file
+\ to-file \ filename ( -- )
+\ causes output to be temporarily diverted to the named file.
+\ The file is created if it doesn't exist, and overwritten if it does.
+\ Output is restored to the console just before Forth prompts for a
+\ new line of input.
+\ append-to-file \ filename ( -- )
+\ Similar to to-file but if the file already exists, the new stuff is
+\ tacked onto the end, rather than overwriting the file.
+\ We really need to make the output stream a multi-field structure, and
+\ keep a stack of output streams.
+only forth also hidden also definitions
+variable old-status ' noop old-status token!
+variable old-(emit ' noop old-(emit token!
+variable old-(type ' noop old-(type token!
+variable old-cr ' noop old-cr token!
+variable old-exit? ' noop old-exit? token!
+variable old-#out 0 old-#out !
+variable old-#line 0 old-#line !
+variable saved-output-valid saved-output-valid off
+: save-output ( -- )
+ ['] status behavior old-status token!
+ ['] (emit behavior old-(emit token!
+ ['] (type behavior old-(type token!
+ ['] cr behavior old-cr token!
+ ['] exit? behavior old-exit? token!
+ #out @ old-#out !
+ #line @ old-#line !
+ saved-output-valid on
+: unsave-output ( -- )
+ saved-output-valid @ if
+ old-(emit token@ is (emit
+ old-(type token@ is (type
+ old-status token@ is status
+ old-cr token@ is cr
+ old-exit? token@ is exit?
+ old-#out @ #out !
+ old-#line @ #line !
+ saved-output-valid off
+: undo-file-output ( -- ) unsave-output ofd @ fclose ;
+: file-(emit ( char -- ) ofd @ fputc ;
+: file-(type ( adr len -- ) ofd @ fputs ;
+: file-cr ( adr len -- )
+ #out off 1 #line +! newline-string ofd @ fputs
+: file-output ( -- )
+ ['] undo-file-output is status
+ ['] file-(emit is (emit
+ ['] file-(type is (type
+ ['] file-cr is cr
+ ['] false is exit?
+ #out off #line off
+: to-file \ filename ( -- )
+ writing file-output
+: append-to-file \ filename ( -- )
+ appending file-output
+only forth also definitions
+\ Copyright (c) 2007 FirmWorks
+\ 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 or substantial portions of the Software.
+\ 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 OR COPYRIGHT HOLDERS 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.
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