version 1.13, 2011/01/01 14:22:47
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version 1.20, 2012/12/31 15:25:18
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\ dynamic string handling 10aug99py |
\ dynamic string handling 10aug99py |
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\ Copyright (C) 2000,2005,2007,2010 Free Software Foundation, Inc. |
\ Copyright (C) 2000,2005,2007,2010,2011,2012 Free Software Foundation, Inc. |
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\ This file is part of Gforth. |
\ This file is part of Gforth. |
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\ 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/. |
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[IFUNDEF] $! |
: delete ( buffer size n -- ) \ gforth-string |
: delete ( buffer size n -- ) \ gforth-string |
\G deletes the first @var{n} bytes from a buffer and fills the |
\G deletes the first @var{n} bytes from a buffer and fills the |
\G rest at the end with blanks. |
\G rest at the end with blanks. |
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>r >r |
>r >r |
$@ BEGIN dup WHILE r@ $split i' -rot >r >r execute r> r> |
$@ BEGIN dup WHILE r@ $split i' -rot >r >r execute r> r> |
REPEAT 2drop rdrop rdrop ; |
REPEAT 2drop rdrop rdrop ; |
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: $over ( addr u $addr off -- ) |
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\G overwrite string at offset off with addr u |
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swap >r |
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r@ @ 0= IF s" " r@ $! THEN |
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2dup + r@ $@len > IF |
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2dup + r@ $@len tuck max r@ $!len |
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r@ $@ rot /string bl fill |
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THEN |
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r> $@ rot /string rot umin move ; |
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\ string array words |
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: $[] ( n addr -- addr' ) >r |
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\G index into the string array and return the address at index n |
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r@ @ 0= IF s" " r@ $! THEN |
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r@ $@ 2 pick cells /string |
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dup cell < IF |
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2drop r@ $@len |
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over 1+ cells r@ $!len |
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r@ $@ rot /string 0 fill |
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r@ $@ 2 pick cells /string |
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THEN drop nip rdrop ; |
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: $[]! ( addr u n $[]addr -- ) $[] $! ; |
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\G store a string into an array at index n |
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: $[]+! ( addr u n $[]addr -- ) $[] $+! ; |
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\G add a string to the string at addr n |
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: $[]@ ( n $[]addr -- addr u ) $[] dup @ IF $@ ELSE drop s" " THEN ; |
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\G fetch a string from array index n -- return the zero string if empty |
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[THEN] |
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