File:  [gforth] / gforth / kernel / files.fs
Revision 1.10: download - view: text, annotated - select for diffs
Wed Sep 6 20:30:07 2000 UTC (21 years, 1 month ago) by anton
Branches: MAIN
CVS tags: HEAD
improved error messages for errors happening in non-files.

    1: \ File specifiers                                       11jun93jaw
    2: 
    3: \ Copyright (C) 1995,1996,1997,1998 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:     newline r> write-file ;
   36: 
   37: \ include-file                                         07apr93py
   38: 
   39: : push-file  ( -- )  r>
   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 ! ;
   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>
   61:   r> >in      !
   62:   r> #tib     !
   63:   r> >tib     !
   64:   r> tibstack !
   65:   r> blk      !
   66:   r> loadfile !
   67:   r> loadline !  >r ;
   68: 
   69: : read-loop ( i*x -- j*x )
   70:   BEGIN  refill  WHILE  interpret  REPEAT ;
   71: 
   72: : include-file1 ( i*x wfileid -- j*x ior1 ior2 )
   73:     \G Interpret (process using the text interpreter) the contents of
   74:     \G the file @var{wfileid}.
   75:     push-file  loadfile !
   76:     0 loadline ! blk off  ['] read-loop catch
   77:     loadfile @ close-file swap 2dup or
   78:     pop-file  drop ;
   79: 
   80: : include-file2 ( i*x wfileid -- j*x )
   81:     \ like include-file, but does not update loadfile#
   82:     include-file1 throw throw ;
   83: 
   84: : include-file ( i*x wfileid -- j*x ) \ file
   85:     loadfilename# @ >r
   86:     3 loadfilename# ! \ "\a file/"
   87:     include-file1
   88:     r> loadfilename# !
   89:     throw throw ;
   90:     
   91: \ additional words only needed if there is file support
   92: 
   93: Warnings off
   94: 
   95: : ( ( compilation 'ccc<close-paren>' -- ; run-time -- ) \ core,file	paren
   96:     loadfile @ 0= IF  postpone (  EXIT  THEN
   97:     BEGIN
   98: 	>in @
   99: 	[char] ) parse nip
  100: 	>in @ rot - = \ is there no delimter?
  101:     WHILE
  102: 	refill 0=
  103: 	IF
  104: 	    warnings @
  105: 	    IF
  106: 		." warning: ')' missing" cr
  107: 	    THEN
  108: 	    EXIT
  109: 	THEN
  110:     REPEAT ; immediate
  111: 
  112: Warnings on

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