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math.bitwise: fix docs for mask and unmask (they don't return a boolean).

db4
John Benediktsson 2014-02-09 15:36:49 -08:00
parent bffeeed589
commit ebbfa17b47
2 changed files with 4 additions and 4 deletions
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4
basis/math/bitwise/bitwise-docs.factor
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@ -184,7 +184,7 @@ HELP: >signed
HELP: mask
{ $values
{ "x" integer } { "n" integer }
{ "?" "a boolean" }
{ "y" integer }
}
{ $description "After the operation, only the bits that were set in both the mask and the original number are set." }
{ $examples
@ -297,7 +297,7 @@ HELP: shift-mod
HELP: unmask
{ $values
{ "x" integer } { "n" integer }
{ "?" "a boolean" }
{ "y" integer }
}
{ $description "Clears the bits in " { $snippet "x" } " if they are set in the mask " { $snippet "n" } "." }
{ $examples

4
basis/math/bitwise/bitwise.factor
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@ -10,9 +10,9 @@ IN: math.bitwise
! utilities
: clear-bit ( x n -- y ) 2^ bitnot bitand ; inline
: set-bit ( x n -- y ) 2^ bitor ; inline
: unmask ( x n -- ? ) bitnot bitand ; inline
: unmask ( x n -- y ) bitnot bitand ; inline
: unmask? ( x n -- ? ) unmask zero? not ; inline
: mask ( x n -- ? ) bitand ; inline
: mask ( x n -- y ) bitand ; inline
: mask? ( x n -- ? ) [ mask ] [ = ] bi ; inline
: wrap ( m n -- m' ) 1 - bitand ; inline
: on-bits ( m -- n ) dup 0 <= [ drop 0 ] [ 2^ 1 - ] if ; inline