Annotation of gforth/kernel/files.fs, revision 1.4

1.1       anton       1: \ File specifiers                                       11jun93jaw
                      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: 
                     21: 4 Constant w/o ( -- fam ) \ file       w-o
                     22: 2 Constant r/w ( -- fam ) \ file       r-w
                     23: 0 Constant r/o ( -- fam ) \ file       r-o
                     24: 
                     25: : bin ( fam1 -- fam2 ) \ file
                     26:     1 or ;
                     27: 
                     28: \ BIN WRITE-LINE                                        11jun93jaw
                     29: 
                     30: : write-line ( c-addr u fileid -- ior ) \ file
                     31:     dup >r write-file
                     32:     ?dup IF
                     33:        r> drop EXIT
                     34:     THEN
                     35:     #lf r> emit-file ;
                     36: 
                     37: \ include-file                                         07apr93py
                     38: 
                     39: : push-file  ( -- )  r>
1.3       pazsan     40:     loadline @ >r
                     41:     loadfile @ >r
                     42:     blk @      >r
                     43:     tibstack @ >r
                     44:     >tib @     >r
                     45:     #tib @     >r
                     46:     >in @      >r  >r
                     47:     >tib @ tibstack @ = IF  #tib @ tibstack +!  THEN
                     48:     tibstack @ >tib ! ;
1.1       anton      49: 
                     50: : pop-file   ( throw-code -- throw-code )
                     51:   dup IF
                     52:          source >in @ sourceline# sourcefilename
                     53:         error-stack dup @ dup 1+
                     54:         max-errors 1- min error-stack !
                     55:         6 * cells + cell+
                     56:         5 cells bounds swap DO
                     57:                            I !
                     58:         -1 cells +LOOP
                     59:   THEN
                     60:   r>
1.3       pazsan     61:   r> >in      !
                     62:   r> #tib     !
                     63:   r> >tib     !
                     64:   r> tibstack !
                     65:   r> blk      !
                     66:   r> loadfile !
                     67:   r> loadline !  >r ;
1.1       anton      68: 
                     69: : read-loop ( i*x -- j*x )
                     70:   BEGIN  refill  WHILE  interpret  REPEAT ;
                     71: 
                     72: : include-file ( i*x fid -- j*x ) \ file
1.4     ! anton      73:     \G interpret (process using the text interpreter) the contents of
        !            74:     \G the file @var{fid}.
        !            75:     push-file  loadfile !
        !            76:     0 loadline ! blk off  ['] read-loop catch
        !            77:     loadfile @ close-file swap 2dup or
        !            78:     pop-file  drop throw throw ;
1.1       anton      79: 
                     80: \ additional words only needed if there is file support
                     81: 
1.2       jwilke     82: Warnings off
                     83: 
1.1       anton      84: : ( ( compilation 'ccc<close-paren>' -- ; run-time -- ) \ core,file    paren
                     85:     loadfile @ 0= IF  postpone (  EXIT  THEN
                     86:     BEGIN
                     87:        >in @
                     88:        [char] ) parse nip
                     89:        >in @ rot - = \ is there no delimter?
                     90:     WHILE
                     91:        refill 0=
                     92:        IF
                     93:            warnings @
                     94:            IF
                     95:                ." warning: ')' missing" cr
                     96:            THEN
                     97:            EXIT
                     98:        THEN
                     99:     REPEAT ; immediate
                    100: 
1.2       jwilke    101: Warnings on

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