50 lines
1.4 KiB
C
50 lines
1.4 KiB
C
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/* cdb_make_add.c: basic cdb_make_add routine
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*
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* This file is a part of tinycdb package by Michael Tokarev, mjt@corpit.ru.
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* Public domain.
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*/
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#include <stdlib.h> /* for malloc */
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#include "cdb_int.h"
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int internal_function
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_cdb_make_add(struct cdb_make *cdbmp, unsigned hval,
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const void *key, unsigned klen,
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const void *val, unsigned vlen)
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{
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unsigned char rlen[8];
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struct cdb_rl *rl;
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unsigned i;
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if (klen > 0xffffffff - (cdbmp->cdb_dpos + 8) ||
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vlen > 0xffffffff - (cdbmp->cdb_dpos + klen + 8))
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return errno = ENOMEM, -1;
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i = hval & 255;
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rl = cdbmp->cdb_rec[i];
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if (!rl || rl->cnt >= sizeof(rl->rec)/sizeof(rl->rec[0])) {
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rl = (struct cdb_rl*)malloc(sizeof(struct cdb_rl));
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if (!rl)
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return errno = ENOMEM, -1;
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rl->cnt = 0;
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rl->next = cdbmp->cdb_rec[i];
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cdbmp->cdb_rec[i] = rl;
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}
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i = rl->cnt++;
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rl->rec[i].hval = hval;
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rl->rec[i].rpos = cdbmp->cdb_dpos;
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++cdbmp->cdb_rcnt;
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cdb_pack(klen, rlen);
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cdb_pack(vlen, rlen + 4);
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if (_cdb_make_write(cdbmp, rlen, 8) < 0 ||
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_cdb_make_write(cdbmp, key, klen) < 0 ||
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_cdb_make_write(cdbmp, val, vlen) < 0)
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return -1;
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return 0;
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}
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int
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cdb_make_add(struct cdb_make *cdbmp,
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const void *key, unsigned klen,
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const void *val, unsigned vlen) {
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return _cdb_make_add(cdbmp, cdb_hash(key, klen), key, klen, val, vlen);
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}
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