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Annotation of gforth/kernel/files.fs, revision 1.11

1.1       anton       1: \ File specifiers                                       11jun93jaw
                      2: 
1.5       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: 
1.9       anton      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
1.1       anton      24: 
1.9       anton      25: : bin ( fam1 -- fam2 ) \ file
1.1       anton      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
1.8       anton      35:     newline r> write-file ;
1.1       anton      36: 
1.11    ! pazsan     37: : read-line ( c_addr u1 wfileid -- u2 flag wior )
        !            38:     (read-line) drop ;
        !            39: 
1.1       anton      40: \ include-file                                         07apr93py
                     41: 
                     42: : push-file  ( -- )  r>
1.3       pazsan     43:     loadline @ >r
                     44:     loadfile @ >r
                     45:     blk @      >r
                     46:     tibstack @ >r
                     47:     >tib @     >r
                     48:     #tib @     >r
                     49:     >in @      >r  >r
                     50:     >tib @ tibstack @ = IF  #tib @ tibstack +!  THEN
                     51:     tibstack @ >tib ! ;
1.1       anton      52: 
                     53: : pop-file   ( throw-code -- throw-code )
                     54:   dup IF
                     55:          source >in @ sourceline# sourcefilename
                     56:         error-stack dup @ dup 1+
                     57:         max-errors 1- min error-stack !
                     58:         6 * cells + cell+
                     59:         5 cells bounds swap DO
                     60:                            I !
                     61:         -1 cells +LOOP
                     62:   THEN
                     63:   r>
1.3       pazsan     64:   r> >in      !
                     65:   r> #tib     !
                     66:   r> >tib     !
                     67:   r> tibstack !
                     68:   r> blk      !
                     69:   r> loadfile !
                     70:   r> loadline !  >r ;
1.1       anton      71: 
                     72: : read-loop ( i*x -- j*x )
                     73:   BEGIN  refill  WHILE  interpret  REPEAT ;
                     74: 
1.10      anton      75: : include-file1 ( i*x wfileid -- j*x ior1 ior2 )
1.6       crook      76:     \G Interpret (process using the text interpreter) the contents of
1.7       crook      77:     \G the file @var{wfileid}.
1.4       anton      78:     push-file  loadfile !
                     79:     0 loadline ! blk off  ['] read-loop catch
                     80:     loadfile @ close-file swap 2dup or
1.10      anton      81:     pop-file  drop ;
                     82: 
                     83: : include-file2 ( i*x wfileid -- j*x )
                     84:     \ like include-file, but does not update loadfile#
                     85:     include-file1 throw throw ;
1.1       anton      86: 
1.10      anton      87: : include-file ( i*x wfileid -- j*x ) \ file
                     88:     loadfilename# @ >r
                     89:     3 loadfilename# ! \ "\a file/"
                     90:     include-file1
                     91:     r> loadfilename# !
                     92:     throw throw ;
                     93:     
1.1       anton      94: \ additional words only needed if there is file support
                     95: 
1.2       jwilke     96: Warnings off
                     97: 
1.1       anton      98: : ( ( compilation 'ccc<close-paren>' -- ; run-time -- ) \ core,file    paren
                     99:     loadfile @ 0= IF  postpone (  EXIT  THEN
                    100:     BEGIN
                    101:        >in @
                    102:        [char] ) parse nip
                    103:        >in @ rot - = \ is there no delimter?
                    104:     WHILE
                    105:        refill 0=
                    106:        IF
                    107:            warnings @
                    108:            IF
                    109:                ." warning: ')' missing" cr
                    110:            THEN
                    111:            EXIT
                    112:        THEN
                    113:     REPEAT ; immediate
                    114: 
1.2       jwilke    115: Warnings on