| \ input output basics (extra since) 02mar97jaw |
\ input output basics (extra since) 02mar97jaw |
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| \ Copyright (C) 1995-1997 Free Software Foundation, Inc. |
\ Copyright (C) 1995,1996,1997,1998,2000 Free Software Foundation, Inc. |
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| \ This file is part of Gforth. |
\ This file is part of Gforth. |
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| \ You should have received a copy of the GNU General Public License |
\ You should have received a copy of the GNU General Public License |
| \ along with this program; if not, write to the Free Software |
\ along with this program; if not, write to the Free Software |
| \ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
\ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA. |
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require ./basics.fs |
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| \ Output 13feb93py |
\ Output 13feb93py |
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|
| has-os [IF] |
has? os [IF] |
| 0 Value outfile-id ( -- file-id ) \ gforth |
0 Value outfile-id ( -- file-id ) \ gforth |
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0 Value infile-id ( -- file-id ) \ gforth |
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|
| : (type) ( c-addr u -- ) \ gforth |
: (type) ( c-addr u -- ) \ gforth |
| outfile-id write-file drop \ !! use ?DUP-IF THROW ENDIF instead of DROP ? |
outfile-id write-file drop \ !! use ?DUP-IF THROW ENDIF instead of DROP ? |
| : (emit) ( c -- ) \ gforth |
: (emit) ( c -- ) \ gforth |
| outfile-id emit-file drop \ !! use ?DUP-IF THROW ENDIF instead of DROP ? |
outfile-id emit-file drop \ !! use ?DUP-IF THROW ENDIF instead of DROP ? |
| ; |
; |
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: (key) ( -- c ) \ gforth |
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infile-id key-file ; |
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|
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: (key?) ( -- flag ) \ gforth |
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infile-id key?-file ; |
| [THEN] |
[THEN] |
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|
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undef-words |
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| Defer type ( c-addr u -- ) \ core |
Defer type ( c-addr u -- ) \ core |
| ' (type) IS Type |
\G If @var{u}>0, display @var{u} characters from a string starting |
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\G with the character stored at @var{c-addr}. |
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[IFDEF] write-file |
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: (type) 0 write-file drop ; |
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[ELSE] |
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: (type) BEGIN dup WHILE |
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>r dup c@ (emit) 1+ r> 1- REPEAT 2drop ; |
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[THEN] |
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[IFDEF] (type) ' (type) IS Type [THEN] |
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| Defer emit ( c -- ) \ core |
Defer emit ( c -- ) \ core |
| ' (Emit) IS Emit |
\G Display the character associated with character value c. |
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: (emit) ( c -- ) \ gforth |
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0 emit-file drop \ !! use ?DUP-IF THROW ENDIF instead of DROP ? |
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; |
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[IFDEF] (emit) ' (emit) IS emit [THEN] |
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Defer key ( -- char ) \ core |
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\G Receive (but do not display) one character, @var{char}. |
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| Defer key ( -- c ) \ core |
[IFDEF] (key) ' (key) IS key [THEN] |
| ' (key) IS key |
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Defer key? ( -- flag ) \ facility key-question |
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\G Determine whether a character is available. If a character is |
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\G available, @var{flag} is true; the next call to @code{key} will |
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\G yield the character. Once @code{key?} returns true, subsequent |
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\G calls to @code{key?} before calling @code{key} or @code{ekey} will |
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\G also return true. |
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|
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[IFDEF] (key?) ' (key?) IS key? [THEN] |
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|
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all-words |
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|
| : (.") "lit count type ; |
: (.") "lit count type ; |
| : (S") "lit count ; |
: (S") "lit count ; |
| 0C constant #ff ( -- c ) \ gforth |
0C constant #ff ( -- c ) \ gforth |
| 0A constant #lf ( -- c ) \ gforth |
0A constant #lf ( -- c ) \ gforth |
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| : bell #bell emit [ has-os [IF] ] outfile-id flush-file drop [ [THEN] ] ; |
: bell #bell emit [ has? os [IF] ] outfile-id flush-file drop [ [THEN] ] ; |
| : cr ( -- ) \ core |
: cr ( -- ) \ core c-r |
| \ emit a newline |
\G Output a newline (of the favourite kind of the host OS). Note |
| [ ?? has-crlf [IF] ] #cr emit #lf emit |
\G that due to the way the Forth command line interpreter inserts |
| [ [ELSE] ] #lf emit |
\G newlines, the preferred way to use @code{cr} is at the start |
| [ [THEN] ] |
\G of a piece of text; e.g., @code{cr ." hello, world"}. |
| ; |
newline type ; |
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|
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: space ( -- ) \ core |
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\G Display one space. |
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bl emit ; |
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| 1 [IF] |
has? ec [IF] |
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: spaces ( n -- ) \ core |
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\G If n > 0, display n spaces. |
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0 max 0 ?DO space LOOP ; |
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: backspaces 0 max 0 ?DO #bs emit LOOP ; |
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[ELSE] |
| \ space spaces 21mar93py |
\ space spaces 21mar93py |
| decimal |
decimal |
| Create spaces ( u -- ) \ core |
Create spaces ( u -- ) \ core |
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\G Display @var{n} spaces. |
| bl 80 times \ times from target compiler! 11may93jaw |
bl 80 times \ times from target compiler! 11may93jaw |
| DOES> ( u -- ) |
DOES> ( u -- ) |
| swap |
swap |
| swap |
swap |
| 0 max 0 ?DO I' I - &80 min 2dup type +LOOP drop ; |
0 max 0 ?DO I' I - &80 min 2dup type +LOOP drop ; |
| hex |
hex |
| : space ( -- ) \ core |
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| 1 spaces ; |
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| [ELSE] |
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| : space bl emit ; |
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| : spaces 0 max 0 ?DO space LOOP ; |
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| [THEN] |
[THEN] |
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