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Annotation of gforth/kernel/io.fs, revision 1.5

1.1       anton       1: \ input output basics                          (extra since)   02mar97jaw
                      2: 
                      3: \ Copyright (C) 1995-1997 Free Software Foundation, Inc.
                      4: 
                      5: \ This file is part of Gforth.
                      6: 
                      7: \ Gforth is free software; you can redistribute it and/or
                      8: \ modify it under the terms of the GNU General Public License
                      9: \ as published by the Free Software Foundation; either version 2
                     10: \ of the License, or (at your option) any later version.
                     11: 
                     12: \ This program is distributed in the hope that it will be useful,
                     13: \ but WITHOUT ANY WARRANTY; without even the implied warranty of
                     14: \ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
                     15: \ GNU General Public License for more details.
                     16: 
                     17: \ You should have received a copy of the GNU General Public License
                     18: \ along with this program; if not, write to the Free Software
                     19: \ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
                     20: 
1.2       jwilke     21: \ Output                                               13feb93py
                     22: 
1.3       jwilke     23: has? os [IF]
1.2       jwilke     24: 0 Value outfile-id ( -- file-id ) \ gforth
1.5     ! pazsan     25: 0 Value infile-id ( -- file-id ) \ gforth
1.2       jwilke     26: 
                     27: : (type) ( c-addr u -- ) \ gforth
                     28:     outfile-id write-file drop \ !! use ?DUP-IF THROW ENDIF instead of DROP ?
                     29: ;
                     30: 
                     31: : (emit) ( c -- ) \ gforth
                     32:     outfile-id emit-file drop \ !! use ?DUP-IF THROW ENDIF instead of DROP ?
                     33: ;
1.5     ! pazsan     34: 
        !            35: : (key) ( -- c ) \ gforth
        !            36:     infile-id key-file ;
        !            37: 
        !            38: : (key?) ( -- flag ) \ gforth
        !            39:     infile-id key?-file ;
1.2       jwilke     40: [THEN]
                     41: 
1.4       pazsan     42: [IFUNDEF] (type)
                     43: : (type)  BEGIN  dup  WHILE
                     44:     >r dup c@ (emit) 1+ r> 1-  REPEAT  2drop ;
                     45: [THEN]
                     46: 
1.2       jwilke     47: Defer type ( c-addr u -- ) \ core
                     48: ' (type) IS Type
                     49: 
                     50: Defer emit ( c -- ) \ core
                     51: ' (Emit) IS Emit
                     52: 
                     53: Defer key ( -- c ) \ core
                     54: ' (key) IS key
1.5     ! pazsan     55: 
        !            56: Defer key? ( -- flag ) \ core
        !            57: ' (key?) IS key?
1.2       jwilke     58: 
                     59: : (.")     "lit count type ;
                     60: : (S")     "lit count ;
                     61: 
1.1       anton      62: \ Input                                                13feb93py
                     63: 
                     64: 07 constant #bell ( -- c ) \ gforth
                     65: 08 constant #bs ( -- c ) \ gforth
                     66: 09 constant #tab ( -- c ) \ gforth
                     67: 7F constant #del ( -- c ) \ gforth
                     68: 0D constant #cr   ( -- c ) \ gforth
                     69: \ the newline key code
                     70: 0C constant #ff ( -- c ) \ gforth
                     71: 0A constant #lf ( -- c ) \ gforth
                     72: 
1.3       jwilke     73: : bell  #bell emit [ has? os [IF] ] outfile-id flush-file drop [ [THEN] ] ;
1.1       anton      74: : cr ( -- ) \ core
                     75:     \ emit a newline
1.3       jwilke     76: [ has? crlf [IF] ]     #cr emit #lf emit 
1.1       anton      77: [ [ELSE] ]             #lf emit
                     78: [ [THEN] ]
                     79:     ;
                     80: 
                     81: 1 [IF]
                     82: \ space spaces                                         21mar93py
                     83: decimal
                     84: Create spaces ( u -- ) \ core
                     85: bl 80 times \ times from target compiler! 11may93jaw
                     86: DOES>   ( u -- )
                     87:     swap
                     88:     0 max 0 ?DO  I' I - &80 min 2dup type  +LOOP  drop ;
                     89: Create backspaces
                     90: 08 80 times \ times from target compiler! 11may93jaw
                     91: DOES>   ( u -- )
                     92:    swap
                     93:    0 max 0 ?DO  I' I - &80 min 2dup type  +LOOP  drop ;
                     94: hex
                     95: : space ( -- ) \ core
                     96:     1 spaces ;
                     97: [ELSE]
                     98: : space bl emit ;
                     99: : spaces 0 max 0 ?DO space LOOP ;
                    100: 
                    101: [THEN]
                    102: