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specialized-arrays: generate slightly more efficient byte-array>T-array words

db4
Slava Pestov 2010-02-20 12:05:12 +13:00
parent 6501480a0e
commit 08a80e5ba2
1 changed files with 11 additions and 4 deletions
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15
basis/specialized-arrays/specialized-arrays.factor
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@ -1,4 +1,4 @@
! Copyright (C) 2008, 2009 Slava Pestov.
! Copyright (C) 2008, 2010 Slava Pestov.
! See http://factorcode.org/license.txt for BSD license.
USING: accessors alien alien.c-types alien.data alien.parser
assocs byte-arrays classes compiler.units functors kernel lexer
@ -19,6 +19,11 @@ ERROR: bad-byte-array-length byte-array type ;
M: bad-byte-array-length summary
drop "Byte array length doesn't divide type width" ;
ERROR: not-a-byte-array alien ;
M: not-a-byte-array summary
drop "Not a byte array" ;
: (underlying) ( n c-type -- array )
heap-size * (byte-array) ; inline
@ -61,9 +66,11 @@ TUPLE: A
[ \ T heap-size calloc ] keep <direct-A> ; inline
: byte-array>A ( byte-array -- specialized-array )
>c-ptr dup length \ T heap-size /mod 0 =
[ drop \ T bad-byte-array-length ] unless
<direct-A> ; inline
>c-ptr dup byte-array? [
dup length \ T heap-size /mod 0 =
[ <direct-A> ]
[ drop \ T bad-byte-array-length ] if
] [ not-a-byte-array ] if ; inline
M: A clone [ underlying>> clone ] [ length>> ] bi <direct-A> ; inline