115 lines
3.0 KiB
Scheme
115 lines
3.0 KiB
Scheme
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(library (ikarus system parameters)
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(export make-parameter)
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(import (except (ikarus) make-parameter))
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(define make-parameter
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(case-lambda
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[(x)
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(case-lambda
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[() x]
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[(v) (set! x v)])]
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[(x guard)
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(unless (procedure? guard)
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(error 'make-parameter "~s is not a procedure" guard))
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(set! x (guard x))
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(case-lambda
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[() x]
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[(v) (set! x (guard v))])])))
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(library (ikarus system handlers)
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(export
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interrupt-handler $apply-nonprocedure-error-handler
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$incorrect-args-error-handler $multiple-values-error $debug
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$underflow-misaligned-error top-level-value-error car-error
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cdr-error fxadd1-error fxsub1-error cadr-error fx+-type-error
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fx+-types-error fx+-overflow-error $do-event)
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(import (except (ikarus) interrupt-handler)
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(only (ikarus system $interrupts) $interrupted? $unset-interrupted!))
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(define interrupt-handler
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(make-parameter
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(lambda ()
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(set-port-output-index! (console-output-port) 0)
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(error #f "interrupted"))
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(lambda (x)
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(if (procedure? x)
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x
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(error 'interrupt-handler "~s is not a procedure" x)))))
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(define $apply-nonprocedure-error-handler
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(lambda (x)
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(error 'apply "~s is not a procedure" x)))
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(define $incorrect-args-error-handler
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(lambda (p n)
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(error 'apply "incorrect number of argument (~s) to ~s" n p)))
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(define $multiple-values-error
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(lambda args
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(error 'apply
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"incorrect number of values ~s returned to single value context"
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args)))
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(define $debug
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(lambda (x)
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(foreign-call "ik_error" (cons "DEBUG" x))))
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(define $underflow-misaligned-error
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(lambda ()
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(foreign-call "ik_error" "misaligned")))
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(define top-level-value-error
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(lambda (x)
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(cond
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[(symbol? x)
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(if (symbol-bound? x)
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(error 'top-level-value-error "BUG in ~s" x)
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(error #f "unbound" (string->symbol (symbol->string x))))]
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[else
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(error 'top-level-value "~s is not a symbol" x)])))
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(define car-error
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(lambda (x)
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(error 'car "~s is not a pair" x)))
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(define cdr-error
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(lambda (x)
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(error 'cdr "~s is not a pair" x)))
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(define fxadd1-error
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(lambda (x)
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(if (fixnum? x)
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(error 'fxadd1 "overflow")
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(error 'fxadd1 "~s is not a fixnum" x))))
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(define fxsub1-error
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(lambda (x)
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(if (fixnum? x)
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(error 'fxsub1 "underflow")
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(error 'fxsub1 "~s is not a fixnum" x))))
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(define cadr-error
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(lambda (x)
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(error 'cadr "invalid list structure in ~s" x)))
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(define fx+-type-error
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(lambda (x)
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(error 'fx+ "~s is not a fixnum" x)))
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(define fx+-types-error
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(lambda (x y)
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(error 'fx+ "~s is not a fixnum"
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(if (fixnum? x) y x))))
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(define fx+-overflow-error
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(lambda (x y)
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(error 'fx+ "overflow")))
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(define $do-event
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(lambda ()
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(when ($interrupted?)
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($unset-interrupted!)
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((interrupt-handler)))))
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)
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