LCOV - code coverage report
Current view: top level - common - keyword.cc (source / functions) Hit Total Coverage
Test: Test Coverage for xapian-core 7028d852e609 Lines: 18 35 51.4 %
Date: 2019-02-17 14:59:59 Functions: 1 2 50.0 %
Branches: 10 24 41.7 %

           Branch data     Line data    Source code
       1                 :            : /** @file keyword.cc
       2                 :            :  * @brief Efficient keyword to enum lookup
       3                 :            :  */
       4                 :            : /* Copyright (C) 2012,2016 Olly Betts
       5                 :            :  *
       6                 :            :  * Permission is hereby granted, free of charge, to any person obtaining a copy
       7                 :            :  * of this software and associated documentation files (the "Software"), to
       8                 :            :  * deal in the Software without restriction, including without limitation the
       9                 :            :  * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
      10                 :            :  * sell copies of the Software, and to permit persons to whom the Software is
      11                 :            :  * furnished to do so, subject to the following conditions:
      12                 :            :  *
      13                 :            :  * The above copyright notice and this permission notice shall be included in
      14                 :            :  * 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 THE
      19                 :            :  * 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 DEALINGS
      22                 :            :  * IN THE SOFTWARE.
      23                 :            :  */
      24                 :            : 
      25                 :            : #include <config.h>
      26                 :            : 
      27                 :            : #include "keyword.h"
      28                 :            : 
      29                 :            : #include <string.h>
      30                 :            : 
      31                 :            : int
      32                 :          0 : keyword(const unsigned char * p, const char * s, size_t len)
      33                 :            : {
      34 [ #  # ][ #  # ]:          0 :     if (len == 0 || len > p[0] || p[len] == 1)
                 [ #  # ]
      35                 :          0 :         return -1;
      36                 :          0 :     p = p + p[0] + p[len] + 3;
      37                 :          0 :     size_t n = len + 1;
      38                 :          0 :     const unsigned char * q = p + n * (p[-2] + 1);
      39                 :            :     /* Binary chop between p and q */
      40                 :          0 :     size_t d = n * 2;
      41         [ #  # ]:          0 :     while (p < q) {
      42                 :          0 :         const unsigned char * m = p + (q - p) / d * n;
      43                 :          0 :         int cmp = memcmp(s, m, len);
      44         [ #  # ]:          0 :         if (cmp < 0) {
      45                 :          0 :             q = m;
      46         [ #  # ]:          0 :         } else if (cmp > 0) {
      47                 :          0 :             p = m + n;
      48                 :            :         } else {
      49                 :          0 :             return m[-1];
      50                 :            :         }
      51                 :            :     }
      52                 :          0 :     return -1;
      53                 :            : }
      54                 :            : 
      55                 :            : int
      56                 :       1898 : keyword2(const unsigned char * p, const char * s, size_t len)
      57                 :            : {
      58 [ +  + ][ -  + ]:       1898 :     if (len == 0 || len > p[0])
      59                 :          2 :         return -1;
      60                 :       1896 :     unsigned offset = (p[len * 2 - 1] | p[len * 2] << 8);
      61         [ -  + ]:       1896 :     if (offset == 1)
      62                 :          0 :         return -1;
      63                 :       1896 :     p = p + 2 * p[0] + offset + 3;
      64                 :       1896 :     size_t n = len + 1;
      65                 :       1896 :     const unsigned char * q = p + n * (p[-2] + 1);
      66                 :            :     /* Binary chop between p and q */
      67                 :       1896 :     size_t d = n * 2;
      68         [ +  + ]:       6106 :     while (p < q) {
      69                 :       5850 :         const unsigned char * m = p + (q - p) / d * n;
      70                 :       5850 :         int cmp = memcmp(s, m, len);
      71         [ +  + ]:       5850 :         if (cmp < 0) {
      72                 :       3659 :             q = m;
      73         [ +  + ]:       2191 :         } else if (cmp > 0) {
      74                 :        551 :             p = m + n;
      75                 :            :         } else {
      76                 :       1640 :             return m[-1];
      77                 :            :         }
      78                 :            :     }
      79                 :        256 :     return -1;
      80                 :            : }

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