28 lines
618 B
C
28 lines
618 B
C
#ifndef __UIO_H
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#define __UIO_H
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struct iovec
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{
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void *iov_base; /* BSD uses caddr_t (1003.1g requires void *) */
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size_t iov_len; /* Must be size_t (1003.1g) */
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};
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/*
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* Total number of bytes covered by an iovec.
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*
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* NOTE that it is not safe to use this function until all the iovec's
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* segment lengths have been validated. Because the individual lengths can
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* overflow a size_t when added together.
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*/
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static inline size_t iov_length(const struct iovec *iov, unsigned long nr_segs)
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{
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unsigned long seg;
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size_t ret = 0;
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for (seg = 0; seg < nr_segs; seg++)
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ret += iov[seg].iov_len;
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return ret;
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}
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#endif
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