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