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39 lines
1.4 KiB
C
39 lines
1.4 KiB
C
/* -*- mode: C; c-basic-offset: 4 -*- */
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#ident "Copyright (c) 2007, 2008 Tokutek Inc. All rights reserved."
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#include "includes.h"
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// Calculate the fingerprint for a kvpair
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static void toku_calc_more_murmur_kvpair (struct x1764 *mm, const void *key, int keylen, const void *val, int vallen) {
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int i;
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i = toku_htonl(keylen);
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x1764_add(mm, (void*)&i, 4);
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x1764_add(mm, key, keylen);
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i = toku_htonl(vallen);
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x1764_add(mm, (void*)&i, 4);
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x1764_add(mm, val, vallen);
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}
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#if 0
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u_int32_t toku_calccrc32_kvpair (const void *key, int keylen, const void *val, int vallen) {
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return toku_calc_more_crc32_kvpair(toku_null_crc, key, keylen, val, vallen);
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}
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u_int32_t toku_calccrc32_kvpair_struct (const struct kv_pair *kvp) {
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return toku_calccrc32_kvpair(kv_pair_key_const(kvp), kv_pair_keylen(kvp),
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kv_pair_val_const(kvp), kv_pair_vallen(kvp));
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}
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#endif
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u_int32_t toku_calc_fingerprint_cmd (u_int32_t type, TXNID xid, const void *key, u_int32_t keylen, const void *val, u_int32_t vallen) {
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unsigned char type_c = (unsigned char)type;
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unsigned int a = toku_htonl(xid>>32);
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unsigned int b = toku_htonl(xid&0xffffffff);
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struct x1764 mm;
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x1764_init(&mm);
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x1764_add(&mm, &type_c, 1);
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x1764_add(&mm, &a, 4);
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x1764_add(&mm, &b, 4);
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toku_calc_more_murmur_kvpair(&mm, key, keylen, val, vallen);
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return x1764_finish(&mm);
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}
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