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/*
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/*
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 *  Mathlib : A C Library of Special Functions
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 *  Mathlib : A C Library of Special Functions
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 *  Copyright (C) 1998 Ross Ihaka
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 *  Copyright (C) 1998 Ross Ihaka
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 *  Copyright (C) 2000 The R Core Team
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 *  Copyright (C) 2000-12 The R Core Team
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 *  Copyright (C) 2003 The R Foundation
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 *  Copyright (C) 2003 The R Foundation
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 *
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 *
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 *  This program is free software; you can redistribute it and/or modify
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 *  This program is free software; you can redistribute it and/or modify
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 *  it under the terms of the GNU General Public License as published by
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 *  it under the terms of the GNU General Public License as published by
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 *  the Free Software Foundation; either version 2 of the License, or
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 *  the Free Software Foundation; either version 2 of the License, or
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	return lgammafn(p) + corr + p - p * log(p + q)
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	return lgammafn(p) + corr + p - p * log(p + q)
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		+ (q - 0.5) * log1p(-p / (p + q));
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		+ (q - 0.5) * log1p(-p / (p + q));
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    }
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    }
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    else
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    else
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	/* p and q are small: p <= q < 10. */
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	/* p and q are small: p <= q < 10. */
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	/* R change for very small args */
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	if (p < 1e-306) return lgamma(p) + (lgamma(q) - lgamma(p+q));
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	return log(gammafn(p) * (gammafn(q) / gammafn(p + q)));
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	return log(gammafn(p) * (gammafn(q) / gammafn(p + q)));
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}
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}