1: \ dynamic string handling 10aug99py
2:
3: \ Copyright (C) 2000 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., 59 Temple Place, Suite 330, Boston, MA 02111, USA.
20:
21: : delete ( buffer size count -- )
22: over min >r r@ - ( left over ) dup 0>
23: IF 2dup swap dup r@ + -rot swap move THEN + r> bl fill ;
24:
25: : insert ( string length buffer size -- )
26: rot over min >r r@ - ( left over )
27: over dup r@ + rot move r> move ;
28:
29: : $padding ( n -- n' )
30: [ 6 cells ] Literal + [ -4 cells ] Literal and ;
31: : $! ( addr1 u addr2 -- )
32: dup @ IF dup @ free throw THEN
33: over $padding allocate throw over ! @
34: over >r rot over cell+ r> move 2dup ! + cell+ bl swap c! ;
35: : $@len ( addr -- u ) @ @ ;
36: : $@ ( addr1 -- addr2 u ) @ dup cell+ swap @ ;
37: : $!len ( u addr -- )
38: over $padding over @ swap resize throw over ! @ ! ;
39: : $del ( addr off u -- ) >r >r dup $@ r> /string r@ delete
40: dup $@len r> - swap $!len ;
41: : $ins ( addr1 u addr2 off -- ) >r
42: 2dup dup $@len rot + swap $!len $@ 1+ r> /string insert ;
43: : $+! ( addr1 u addr2 -- ) dup $@len $ins ;
44: : $off ( addr -- ) dup @ free throw off ;
45:
46: \ dynamic string handling 12dec99py
47:
48: : $split ( addr u char -- addr1 u1 addr2 u2 )
49: >r 2dup r> scan dup >r dup IF 1 /string THEN
50: 2swap r> - 2swap ;
51:
52: : $iter ( .. $addr char xt -- .. ) { char xt }
53: $@ BEGIN dup WHILE char $split >r >r xt execute r> r>
54: REPEAT 2drop ;
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