version 1.1, 2000/03/26 21:53:16
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version 1.13, 2011/01/01 14:22:47
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\ dynamic string handling 10aug99py |
\ dynamic string handling 10aug99py |
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: delete ( buffer size count -- ) |
\ Copyright (C) 2000,2005,2007,2010 Free Software Foundation, Inc. |
over min >r r@ - ( left over ) dup 0> |
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IF 2dup swap dup r@ + -rot swap move THEN + r> bl fill ; |
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: insert ( string length buffer size -- ) |
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rot over min >r r@ - ( left over ) |
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over dup r@ + rot move r> move ; |
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: $padding ( n -- n' ) |
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[ 6 cells ] Literal + [ -4 cells ] Literal and ; |
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: $! ( addr1 u addr2 -- ) |
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dup @ IF dup @ free throw THEN |
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over $padding allocate throw over ! @ |
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over >r rot over cell+ r> move 2dup ! + cell+ bl swap c! ; |
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: $@len ( addr -- u ) @ @ ; |
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: $@ ( addr1 -- addr2 u ) @ dup cell+ swap @ ; |
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: $!len ( u addr -- ) |
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over $padding over @ swap resize throw over ! @ ! ; |
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: $del ( addr off u -- ) >r >r dup $@ r> /string r@ delete |
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dup $@len r> - swap $!len ; |
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: $ins ( addr1 u addr2 off -- ) >r |
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2dup dup $@len rot + swap $!len $@ 1+ r> /string insert ; |
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: $+! ( addr1 u addr2 -- ) dup $@len $ins ; |
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: $off ( addr -- ) dup @ free throw off ; |
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\ dynamic string handling 12dec99py |
\ This file is part of Gforth. |
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\ Gforth is free software; you can redistribute it and/or |
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\ modify it under the terms of the GNU General Public License |
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\ as published by the Free Software Foundation, either version 3 |
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\ of the License, or (at your option) any later version. |
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\ This program is distributed in the hope that it will be useful, |
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\ but WITHOUT ANY WARRANTY; without even the implied warranty of |
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\ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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\ GNU General Public License for more details. |
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\ You should have received a copy of the GNU General Public License |
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\ along with this program. If not, see http://www.gnu.org/licenses/. |
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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. |
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over min >r r@ - ( left over ) dup 0> |
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IF 2dup swap dup r@ + -rot swap move THEN + r> bl fill ; |
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: insert ( string length buffer size -- ) \ gforth-string |
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\G inserts a string at the front of a buffer. The remaining |
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\G bytes are moved on. |
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rot over min >r r@ - ( left over ) |
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over dup r@ + rot move r> move ; |
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: $padding ( n -- n' ) \ gforth-string |
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[ 6 cells ] Literal + [ -4 cells ] Literal and ; |
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: $! ( 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. |
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dup @ IF dup @ free throw THEN |
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over $padding allocate throw over ! @ |
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over >r rot over cell+ r> move 2dup ! + cell+ bl swap c! ; |
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: $@len ( addr -- u ) \ gforth-string string-fetch-len |
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\G returns the length of the stored string. |
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@ @ ; |
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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. |
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over $padding over @ swap resize throw over ! @ ! ; |
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: $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 |
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dup $@len r> - swap $!len ; |
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: $ins ( addr1 u addr2 off -- ) \ gforth-string string-ins |
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\G inserts a string at offset @var{off}. |
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>r 2dup dup $@len rot + swap $!len $@ 1+ r> /string insert ; |
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: $+! ( 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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: $split ( addr u char -- addr1 u1 addr2 u2 ) |
\ dynamic string handling 12dec99py |
>r 2dup r> scan dup >r 1 /string 2swap r> - 2swap ; |
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: $iter ( .. $addr char xt -- .. ) { char xt } |
: $split ( addr u char -- addr1 u1 addr2 u2 ) \ gforth-string string-split |
$@ BEGIN dup WHILE char $split >r >r xt execute r> r> |
\G divides a string into two, with one char as separator (e.g. '?' |
REPEAT 2drop ; |
\G for arguments in an HTML query) |
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>r 2dup r> scan dup >r dup IF 1 /string THEN |
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2swap r> - 2swap ; |
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: $iter ( .. $addr char xt -- .. ) \ gforth-string string-iter |
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\G takes a string apart piece for piece, also with a character as |
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\G separator. For each part a passed token will be called. With |
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\G this you can take apart arguments -- separated with '&' -- at |
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\G ease. |
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>r >r |
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$@ BEGIN dup WHILE r@ $split i' -rot >r >r execute r> r> |
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REPEAT 2drop rdrop rdrop ; |