43 lines
2.2 KiB
Factor
43 lines
2.2 KiB
Factor
USING: help.markup help.syntax byte-arrays ;
|
|
IN: specialized-arrays
|
|
|
|
ARTICLE: "specialized-arrays" "Specialized arrays"
|
|
"The " { $vocab-link "specialized-arrays" } " vocabulary implements fixed-length sequence types for storing machine values in a space-efficient manner without boxing."
|
|
$nl
|
|
"For each primitive C type " { $snippet "T" } ", a set of words are defined in the vocabulary named " { $snippet "specialized-arrays.T" } ":"
|
|
{ $table
|
|
{ { $snippet "T-array" } { "The class of arrays with elements of type " { $snippet "T" } } }
|
|
{ { $snippet "<T-array>" } { "Constructor for arrays with elements of type " { $snippet "T" } "; stack effect " { $snippet "( len -- array )" } } }
|
|
{ { $snippet ">T-array" } { "Converts a sequence into a specialized array of type " { $snippet "T" } "; stack effect " { $snippet "( seq -- array )" } } }
|
|
{ { $snippet "byte-array>T-array" } { "Converts a byte array into a specialized array by interpreting the bytes in as machine-specific values. Code which uses this word is unportable" } }
|
|
{ { $snippet "T-array{" } { "Literal syntax, consists of a series of values terminated by " { $snippet "}" } } }
|
|
}
|
|
"Each specialized array has a " { $slot "underlying" } " slot holding a " { $link byte-array } " with the raw data. This data can be passed to C functions."
|
|
$nl
|
|
"The primitive C types for which specialized arrays exist:"
|
|
{ $list
|
|
{ $snippet "char" }
|
|
{ $snippet "uchar" }
|
|
{ $snippet "short" }
|
|
{ $snippet "ushort" }
|
|
{ $snippet "int" }
|
|
{ $snippet "uint" }
|
|
{ $snippet "long" }
|
|
{ $snippet "ulong" }
|
|
{ $snippet "longlong" }
|
|
{ $snippet "ulonglong" }
|
|
{ $snippet "float" }
|
|
{ $snippet "double" }
|
|
{ $snippet "complex-float" }
|
|
{ $snippet "complex-double" }
|
|
{ $snippet "void*" }
|
|
{ $snippet "bool" }
|
|
}
|
|
"Note that " { $vocab-link "specialized-arrays.bool" } " behaves like a C " { $snippet "bool[]" } " array, and each element takes up 8 bits of space. For a more space-efficient boolean array, see " { $link "bit-arrays" } "."
|
|
$nl
|
|
"Specialized arrays are generated with a functor in the " { $vocab-link "specialized-arrays.functor" } " vocabulary."
|
|
$nl
|
|
"The " { $vocab-link "specialized-vectors" } " vocabulary provides resizable versions of the above." ;
|
|
|
|
ABOUT: "specialized-arrays"
|