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c52873e8b9
a SRFI 60 installed which imports (scheme base). This can still break in theory if a user installs a third-party SRFI 33 in the search path in front of the Chibi SRFI 33, but we can't always be safe against such behavior. Fixes issue #267.
19 lines
626 B
Scheme
19 lines
626 B
Scheme
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(define-library (chibi iset optimize)
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(cond-expand
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(chibi (import (chibi) (srfi 9)))
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(else (import (scheme base))))
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(import (chibi iset base)
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(chibi iset iterators)
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(chibi iset constructors))
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(cond-expand
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((library (srfi 33)) (import (srfi 33)))
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(else
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(import (srfi 60))
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(begin
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(define (%mask size) (bitwise-not (arithmetic-shift -1 size)))
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(define (extract-bit-field size position n)
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(bitwise-and (%mask size) (arithmetic-shift n (- position)))))))
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(include "optimize.scm")
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(export
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iset-balance iset-balance! iset-optimize iset-optimize! iset->code))
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