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Annotation of gforth/kernel/io.fs, revision 1.7

1.1       anton       1: \ input output basics                          (extra since)   02mar97jaw
                      2: 
1.6       anton       3: \ Copyright (C) 1995,1996,1997,1998 Free Software Foundation, Inc.
1.1       anton       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
1.7     ! pazsan     26:     
1.2       jwilke     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: 
1.7     ! pazsan     42: undef-words
        !            43:     
        !            44: Defer type ( c-addr u -- ) \ core
1.4       pazsan     45: : (type)  BEGIN  dup  WHILE
                     46:     >r dup c@ (emit) 1+ r> 1-  REPEAT  2drop ;
                     47: 
1.7     ! pazsan     48: [IFDEF] (type) ' (type) IS Type [THEN]
1.2       jwilke     49: 
                     50: Defer emit ( c -- ) \ core
1.7     ! pazsan     51: : (emit) ( c -- ) \ gforth
        !            52:     0 emit-file drop \ !! use ?DUP-IF THROW ENDIF instead of DROP ?
        !            53: ;
        !            54: 
        !            55: [IFDEF] (emit) ' (emit) IS emit [THEN]
1.2       jwilke     56: 
                     57: Defer key ( -- c ) \ core
1.7     ! pazsan     58: : (key) ( -- c ) \ gforth
        !            59:     0 key-file ;
        !            60: 
        !            61: [IFDEF] (key) ' (key) IS key [THEN]
1.5       pazsan     62: 
                     63: Defer key? ( -- flag ) \ core
1.7     ! pazsan     64: : (key?) ( -- flag ) \ gforth
        !            65:     0 key?-file ;
        !            66: 
        !            67: [IFDEF] (key?) ' (key?) IS key? [THEN]
        !            68: 
        !            69: all-words
1.2       jwilke     70: 
                     71: : (.")     "lit count type ;
                     72: : (S")     "lit count ;
                     73: 
1.1       anton      74: \ Input                                                13feb93py
                     75: 
                     76: 07 constant #bell ( -- c ) \ gforth
                     77: 08 constant #bs ( -- c ) \ gforth
                     78: 09 constant #tab ( -- c ) \ gforth
                     79: 7F constant #del ( -- c ) \ gforth
                     80: 0D constant #cr   ( -- c ) \ gforth
                     81: \ the newline key code
                     82: 0C constant #ff ( -- c ) \ gforth
                     83: 0A constant #lf ( -- c ) \ gforth
                     84: 
1.3       jwilke     85: : bell  #bell emit [ has? os [IF] ] outfile-id flush-file drop [ [THEN] ] ;
1.1       anton      86: : cr ( -- ) \ core
                     87:     \ emit a newline
1.3       jwilke     88: [ has? crlf [IF] ]     #cr emit #lf emit 
1.1       anton      89: [ [ELSE] ]             #lf emit
                     90: [ [THEN] ]
                     91:     ;
                     92: 
1.7     ! pazsan     93: : space bl emit ;
        !            94: has? ec [IF]
        !            95: : spaces 0 max 0 ?DO space LOOP ;
        !            96: : backspaces  0 max 0 ?DO  #bs emit  LOOP ;
        !            97: [ELSE]
1.1       anton      98: \ space spaces                                         21mar93py
                     99: decimal
                    100: Create spaces ( u -- ) \ core
                    101: bl 80 times \ times from target compiler! 11may93jaw
                    102: DOES>   ( u -- )
                    103:     swap
                    104:     0 max 0 ?DO  I' I - &80 min 2dup type  +LOOP  drop ;
                    105: Create backspaces
                    106: 08 80 times \ times from target compiler! 11may93jaw
                    107: DOES>   ( u -- )
                    108:    swap
                    109:    0 max 0 ?DO  I' I - &80 min 2dup type  +LOOP  drop ;
                    110: hex
                    111: [THEN]
                    112: