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30 lines
775 B
30 lines
775 B
/*
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* UCW Library -- Universal Sorter: Radix-Split Module
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*
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* (c) 2007 Martin Mares <mj@ucw.cz>
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*
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* This software may be freely distributed and used according to the terms
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* of the GNU Lesser General Public License.
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*/
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#include <string.h>
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static void P(radix_split)(struct sort_context *ctx UNUSED, struct sort_bucket *bin, struct sort_bucket **bouts, uint bitpos, uint numbits)
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{
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uint nbucks = 1 << numbits;
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uint mask = nbucks - 1;
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struct fastbuf *in = sbuck_read(bin);
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P(key) k;
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struct fastbuf *outs[nbucks];
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bzero(outs, sizeof(outs));
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while (P(read_key)(in, &k))
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{
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P(hash_t) h = P(hash)(&k);
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uint i = (h >> bitpos) & mask;
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if (unlikely(!outs[i]))
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outs[i] = sbuck_write(bouts[i]);
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P(copy_data)(&k, in, outs[i]);
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}
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}
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