Feature #9799 ยป f36b9cd63c8218d17a4ddf346a88b9d64a62f557.diff
| math.c | ||
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return DBL2NUM(M_PI);
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return DBL2NUM(-M_PI);
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}
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if (isinf(dx) && isinf(dy)) domain_error("atan2");
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if (isinf(dx) && isinf(dy)) {
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double dz = (dx < 0.0) ? (3.0 * M_PI / 4.0) : (M_PI / 4.0);
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if (dy < 0.0) dz = -dz;
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return DBL2NUM(dz);
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}
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return DBL2NUM(atan2(dy, dx));
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}
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| test/ruby/test_math.rb | ||
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check(-0.0, Math.atan2(-0.0, +0.0))
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check(+Math::PI, Math.atan2(+0.0, -0.0))
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check(-Math::PI, Math.atan2(-0.0, -0.0))
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assert_raise(Math::DomainError) { Math.atan2(Float::INFINITY, Float::INFINITY) }
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assert_raise(Math::DomainError) { Math.atan2(Float::INFINITY, -Float::INFINITY) }
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assert_raise(Math::DomainError) { Math.atan2(-Float::INFINITY, Float::INFINITY) }
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assert_raise(Math::DomainError) { Math.atan2(-Float::INFINITY, -Float::INFINITY) }
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inf = Float::INFINITY
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expected = 3.0 * Math::PI / 4.0
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assert_nothing_raised { check(+expected, Math.atan2(+inf, -inf)) }
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assert_nothing_raised { check(-expected, Math.atan2(-inf, -inf)) }
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expected = Math::PI / 4.0
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assert_nothing_raised { check(+expected, Math.atan2(+inf, +inf)) }
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assert_nothing_raised { check(-expected, Math.atan2(-inf, +inf)) }
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check(0, Math.atan2(0, 1))
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check(Math::PI / 4, Math.atan2(1, 1))
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check(Math::PI / 2, Math.atan2(1, 0))
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