version 1.8, 2007/12/31 19:02:24
|
version 1.13, 2011/01/01 14:22:47
|
Line 1
|
Line 1
|
\ dynamic string handling 10aug99py |
\ dynamic string handling 10aug99py |
|
|
\ Copyright (C) 2000,2005,2007 Free Software Foundation, Inc. |
\ Copyright (C) 2000,2005,2007,2010 Free Software Foundation, Inc. |
|
|
\ This file is part of Gforth. |
\ This file is part of Gforth. |
|
|
Line 17
|
Line 17
|
\ You should have received a copy of the GNU General Public License |
\ You should have received a copy of the GNU General Public License |
\ along with this program. If not, see http://www.gnu.org/licenses/. |
\ along with this program. If not, see http://www.gnu.org/licenses/. |
|
|
: delete ( buffer size count -- ) |
: delete ( buffer size n -- ) \ gforth-string |
over min >r r@ - ( left over ) dup 0> |
\G deletes the first @var{n} bytes from a buffer and fills the |
IF 2dup swap dup r@ + -rot swap move THEN + r> bl fill ; |
\G rest at the end with blanks. |
|
over min >r r@ - ( left over ) dup 0> |
[IFUNDEF] insert |
IF 2dup swap dup r@ + -rot swap move THEN + r> bl fill ; |
: insert ( string length buffer size -- ) |
|
rot over min >r r@ - ( left over ) |
: insert ( string length buffer size -- ) \ gforth-string |
over dup r@ + rot move r> move ; |
\G inserts a string at the front of a buffer. The remaining |
[THEN] |
\G bytes are moved on. |
|
rot over min >r r@ - ( left over ) |
: $padding ( n -- n' ) |
over dup r@ + rot move r> move ; |
[ 6 cells ] Literal + [ -4 cells ] Literal and ; |
|
: $! ( addr1 u addr2 -- ) |
: $padding ( n -- n' ) \ gforth-string |
dup @ IF dup @ free throw THEN |
[ 6 cells ] Literal + [ -4 cells ] Literal and ; |
over $padding allocate throw over ! @ |
: $! ( addr1 u addr2 -- ) \ gforth-string string-store |
over >r rot over cell+ r> move 2dup ! + cell+ bl swap c! ; |
\G stores a string at an address, If there was a string there |
: $@len ( addr -- u ) @ @ ; |
\G already, that string will be lost. |
: $@ ( addr1 -- addr2 u ) @ dup cell+ swap @ ; |
dup @ IF dup @ free throw THEN |
: $!len ( u addr -- ) |
over $padding allocate throw over ! @ |
over $padding over @ swap resize throw over ! @ ! ; |
over >r rot over cell+ r> move 2dup ! + cell+ bl swap c! ; |
: $del ( addr off u -- ) >r >r dup $@ r> /string r@ delete |
: $@len ( addr -- u ) \ gforth-string string-fetch-len |
dup $@len r> - swap $!len ; |
\G returns the length of the stored string. |
: $ins ( addr1 u addr2 off -- ) >r |
@ @ ; |
2dup dup $@len rot + swap $!len $@ 1+ r> /string insert ; |
: $@ ( addr1 -- addr2 u ) \ gforth-string string-fetch |
: $+! ( addr1 u addr2 -- ) dup $@len $ins ; |
\G returns the stored string. |
: $off ( addr -- ) dup @ free throw off ; |
@ dup cell+ swap @ ; |
|
: $!len ( u addr -- ) \ gforth-string string-store-len |
|
\G changes the length of the stored string. Therefore we must |
|
\G change the memory area and adjust address and count cell as |
|
\G well. |
|
over $padding over @ swap resize throw over ! @ ! ; |
|
: $del ( addr off u -- ) \ gforth-string string-del |
|
\G deletes @var{u} bytes from a string with offset @var{off}. |
|
>r >r dup $@ r> /string r@ delete |
|
dup $@len r> - swap $!len ; |
|
: $ins ( addr1 u addr2 off -- ) \ gforth-string string-ins |
|
\G inserts a string at offset @var{off}. |
|
>r 2dup dup $@len rot + swap $!len $@ 1+ r> /string insert ; |
|
: $+! ( addr1 u addr2 -- ) \ gforth-string string-plus-store |
|
\G appends a string to another. |
|
dup $@len $ins ; |
|
: $off ( addr -- ) \ gforth-string string-off |
|
\G releases a string. |
|
dup @ dup IF free throw off ELSE 2drop THEN ; |
|
: $init ( addr -- ) \ gforth-string string-init |
|
\G initializes a string to empty (doesn't look at what was there before). |
|
>r r@ off s" " r> $! ; |
|
|
\ dynamic string handling 12dec99py |
\ dynamic string handling 12dec99py |
|
|
: $split ( addr u char -- addr1 u1 addr2 u2 ) |
: $split ( addr u char -- addr1 u1 addr2 u2 ) \ gforth-string string-split |
>r 2dup r> scan dup >r dup IF 1 /string THEN |
\G divides a string into two, with one char as separator (e.g. '?' |
2swap r> - 2swap ; |
\G for arguments in an HTML query) |
|
>r 2dup r> scan dup >r dup IF 1 /string THEN |
: $iter ( .. $addr char xt -- .. ) { char xt } |
2swap r> - 2swap ; |
$@ BEGIN dup WHILE char $split >r >r xt execute r> r> |
|
REPEAT 2drop ; |
: $iter ( .. $addr char xt -- .. ) \ gforth-string string-iter |
|
\G takes a string apart piece for piece, also with a character as |
|
\G separator. For each part a passed token will be called. With |
|
\G this you can take apart arguments -- separated with '&' -- at |
|
\G ease. |
|
>r >r |
|
$@ BEGIN dup WHILE r@ $split i' -rot >r >r execute r> r> |
|
REPEAT 2drop rdrop rdrop ; |