68 lines
2.4 KiB
C
68 lines
2.4 KiB
C
/* 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.
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* Copyright (C) 2001-2023 Michael Tokarev <mjt+cdb@corpit.ru>
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included
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* in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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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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