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strxnmov(dst, len, src1, ..., srcn, NULL)
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strxnmov(dst, len, src1, ..., srcn, NullS)
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moves the first len characters of the concatenation of src1,...,srcn
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25
to dst and add a closing NUL character.
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Beware: the last argument should be the null character pointer.
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and NOT to use 0, as on some machines 0 is not the same size as a
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characters; dst will be padded on the right with one '\0' character.
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if total-string-length >= length then dst[length] will be set to \0