File:  [gforth] / gforth / kernel / files.fs
Revision 1.11: download - view: text, annotated - select for diffs
Sat Sep 9 20:32:58 2000 UTC (21 years, 1 month ago) by pazsan
Branches: MAIN
CVS tags: HEAD
Fixed CR/LF bug wrt save/restore-input

    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: : read-line ( c_addr u1 wfileid -- u2 flag wior )
   38:     (read-line) drop ;
   39: 
   40: \ include-file                                         07apr93py
   41: 
   42: : push-file  ( -- )  r>
   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 ! ;
   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>
   64:   r> >in      !
   65:   r> #tib     !
   66:   r> >tib     !
   67:   r> tibstack !
   68:   r> blk      !
   69:   r> loadfile !
   70:   r> loadline !  >r ;
   71: 
   72: : read-loop ( i*x -- j*x )
   73:   BEGIN  refill  WHILE  interpret  REPEAT ;
   74: 
   75: : include-file1 ( i*x wfileid -- j*x ior1 ior2 )
   76:     \G Interpret (process using the text interpreter) the contents of
   77:     \G the file @var{wfileid}.
   78:     push-file  loadfile !
   79:     0 loadline ! blk off  ['] read-loop catch
   80:     loadfile @ close-file swap 2dup or
   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 ;
   86: 
   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:     
   94: \ additional words only needed if there is file support
   95: 
   96: Warnings off
   97: 
   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: 
  115: Warnings on

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