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/* $Id: cdb_make_add.c,v 1.8 2006/06/28 17:49:21 mjt Exp $
* basic cdb_make_add routine
*
* This file is a part of tinycdb package by Michael Tokarev, mjt@corpit.ru.
* Public domain.
*/
#include <stdlib.h> /* for malloc */
#include "cdb_int.h"
int internal_function
_cdb_make_add(struct cdb_make *cdbmp, unsigned hval,
const void *key, unsigned klen,
const void *val, unsigned vlen)
{
unsigned char rlen[8];
struct cdb_rl *rl;
unsigned i;
if (klen > 0xffffffff - (cdbmp->cdb_dpos + 8) ||
vlen > 0xffffffff - (cdbmp->cdb_dpos + klen + 8))
return errno = ENOMEM, -1;
i = hval & 255;
rl = cdbmp->cdb_rec[i];
if (!rl || rl->cnt >= sizeof(rl->rec)/sizeof(rl->rec[0])) {
rl = (struct cdb_rl*)malloc(sizeof(struct cdb_rl));
if (!rl)
return errno = ENOMEM, -1;
rl->cnt = 0;
rl->next = cdbmp->cdb_rec[i];
cdbmp->cdb_rec[i] = rl;
}
i = rl->cnt++;
rl->rec[i].hval = hval;
rl->rec[i].rpos = cdbmp->cdb_dpos;
++cdbmp->cdb_rcnt;
cdb_pack(klen, rlen);
cdb_pack(vlen, rlen + 4);
if (_cdb_make_write(cdbmp, rlen, 8) < 0 ||
_cdb_make_write(cdbmp, key, klen) < 0 ||
_cdb_make_write(cdbmp, val, vlen) < 0)
return -1;
return 0;
}
int
cdb_make_add(struct cdb_make *cdbmp,
const void *key, unsigned klen,
const void *val, unsigned vlen) {
return _cdb_make_add(cdbmp, cdb_hash(key, klen), key, klen, val, vlen);
}
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