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authorGuido van Rossum <guido@python.org>2000-05-08 14:29:38 (GMT)
committerGuido van Rossum <guido@python.org>2000-05-08 14:29:38 (GMT)
commitc554505ca1318fd7aed32086ceb4b53ae767ffa3 (patch)
treea1b19d31b3d48ee03d28585b6484f3e93dc66c48 /Demo
parent23ef82ffe330c16cac7406c202ce55cc0d828f0a (diff)
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Trent Mick:
Fix overflow bug in ldexp(x, exp). The 'exp' argument maps to a C int for the math library call [double ldexp(double, int)], however the 'd' PyArg_ParseTuple formatter was used to yield a double, which was subsequently cast to an int. This could overflow. [GvR: mysteriously, on Solaris 2.7, ldexp(1, 2147483647) returns Inf while ldexp(1, 2147483646) raises OverflowError; this seems a bug in the math library (it also takes a real long time to compute the Inf outcome). Does this point to a bug in the CHECK() macro? It should have discovered that the result was outside the HUGE_VAL range.]
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