Branch data     Line data    Source code

       1                 :             : /* cdb_make_add.c: basic cdb_make_add routine
       2                 :             :  *
       3                 :             :  * This file is a part of tinycdb package.
       4                 :             :  * Copyright (C) 2001-2023 Michael Tokarev <mjt+cdb@corpit.ru>
       5                 :             :  *
       6                 :             :  * Permission is hereby granted, free of charge, to any person obtaining a
       7                 :             :  * copy of this software and associated documentation files (the "Software"),
       8                 :             :  * to deal in the Software without restriction, including without limitation
       9                 :             :  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
      10                 :             :  * and/or sell copies of the Software, and to permit persons to whom the
      11                 :             :  * Software is furnished to do so, subject to the following conditions:
      12                 :             :  *
      13                 :             :  * The above copyright notice and this permission notice shall be included
      14                 :             :  * in all copies or substantial portions of the Software.
      15                 :             :  *
      16                 :             :  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
      17                 :             :  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
      18                 :             :  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
      19                 :             :  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
      20                 :             :  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
      21                 :             :  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
      22                 :             :  * DEALINGS IN THE SOFTWARE.
      23                 :             :  */
      24                 :             : 
      25                 :             : #include <stdlib.h> /* for malloc */
      26                 :             : #include "cdb_int.h"
      27                 :             : 
      28                 :             : int internal_function
      29                 :           8 : _cdb_make_add(struct cdb_make *cdbmp, unsigned hval,
      30                 :             :               const void *key, unsigned klen,
      31                 :             :               const void *val, unsigned vlen)
      32                 :             : {
      33                 :             :   unsigned char rlen[8];
      34                 :             :   struct cdb_rl *rl;
      35                 :             :   unsigned i;
      36         [ +  - ]:           8 :   if (klen > 0xffffffff - (cdbmp->cdb_dpos + 8) ||
      37         [ -  + ]:           8 :       vlen > 0xffffffff - (cdbmp->cdb_dpos + klen + 8))
      38                 :           0 :     return errno = ENOMEM, -1;
      39                 :           8 :   i = hval & 255;
      40                 :           8 :   rl = cdbmp->cdb_rec[i];
      41   [ -  +  -  - ]:           8 :   if (!rl || rl->cnt >= sizeof(rl->rec)/sizeof(rl->rec[0])) {
      42                 :           8 :     rl = (struct cdb_rl*)malloc(sizeof(struct cdb_rl));
      43         [ -  + ]:           8 :     if (!rl)
      44                 :           0 :       return errno = ENOMEM, -1;
      45                 :           8 :     rl->cnt = 0;
      46                 :           8 :     rl->next = cdbmp->cdb_rec[i];
      47                 :           8 :     cdbmp->cdb_rec[i] = rl;
      48                 :             :   }
      49                 :           8 :   i = rl->cnt++;
      50                 :           8 :   rl->rec[i].hval = hval;
      51                 :           8 :   rl->rec[i].rpos = cdbmp->cdb_dpos;
      52                 :           8 :   ++cdbmp->cdb_rcnt;
      53                 :           8 :   cdb_pack(klen, rlen);
      54                 :           8 :   cdb_pack(vlen, rlen + 4);
      55   [ +  -  +  - ]:          16 :   if (_cdb_make_write(cdbmp, rlen, 8) < 0 ||
      56         [ -  + ]:          16 :       _cdb_make_write(cdbmp, key, klen) < 0 ||
      57                 :           8 :       _cdb_make_write(cdbmp, val, vlen) < 0)
      58                 :           0 :     return -1;
      59                 :           8 :   return 0;
      60                 :             : }
      61                 :             : 
      62                 :             : int
      63                 :           0 : cdb_make_add(struct cdb_make *cdbmp,
      64                 :             :              const void *key, unsigned klen,
      65                 :             :              const void *val, unsigned vlen) {
      66                 :           0 :   return _cdb_make_add(cdbmp, cdb_hash(key, klen), key, klen, val, vlen);
      67                 :             : }