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Optionally, the user can supply the entry point \code{user_unif_init},
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Optionally, the user can supply the entry point \code{user_unif_init},
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which is called with an \code{unsigned int} argument when
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which is called with an \code{unsigned int} argument when
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\code{\link{RNGkind}} (or \code{set.seed}) is called, and is intended
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\code{\link{RNGkind}} (or \code{set.seed}) is called, and is intended
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to be used to initialize the user's RNG code. The argument is intended
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to be used to initialize the user's RNG code. The argument is intended
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to be used to set the ``seeds''; it is the \code{seed} argument to
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to be used to set the \dQuote{seeds}; it is the \code{seed} argument to
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\code{set.seed} or an essentially random seed if \code{\link{RNGkind}}
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\code{set.seed} or an essentially random seed if \code{\link{RNGkind}}
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is called.
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is called.
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If only these functions are supplied, no information about the
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If only these functions are supplied, no information about the
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generator's state is recorded in \code{.Random.seed}. Optionally,
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generator's state is recorded in \code{.Random.seed}. Optionally,
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functions \code{user_unif_nseed} and \code{user_unif_seedloc} can be
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functions \code{user_unif_nseed} and \code{user_unif_seedloc} can be
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supplied which are called with no arguments and should return pointers
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supplied which are called with no arguments and should return pointers
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to the number of ``seeds'' and to an integer array of ``seeds''. Calls
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to the number of \dQuote{seeds} and to an integer array of
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\dQuote{seeds}. Calls
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to \code{GetRNGstate} and \code{PutRNGstate} will then copy this array
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to \code{GetRNGstate} and \code{PutRNGstate} will then copy this array
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to and from \code{.Random.seed}.
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to and from \code{.Random.seed}.
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A user-specified normal RNG is specified by a single entry point
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A user-specified normal RNG is specified by a single entry point
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\code{user_norm_rand}, which takes no arguments and returns a
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\code{user_norm_rand}, which takes no arguments and returns a
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