| File: | src/lib/libelf/elf_hash.c |
| Warning: | line 44, column 6 Although the value stored to 't' is used in the enclosing expression, the value is never actually read from 't' |
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| 1 | /*- |
| 2 | * Copyright (c) 2006,2008 Joseph Koshy |
| 3 | * All rights reserved. |
| 4 | * |
| 5 | * Redistribution and use in source and binary forms, with or without |
| 6 | * modification, are permitted provided that the following conditions |
| 7 | * are met: |
| 8 | * 1. Redistributions of source code must retain the above copyright |
| 9 | * notice, this list of conditions and the following disclaimer. |
| 10 | * 2. Redistributions in binary form must reproduce the above copyright |
| 11 | * notice, this list of conditions and the following disclaimer in the |
| 12 | * documentation and/or other materials provided with the distribution. |
| 13 | * |
| 14 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND |
| 15 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 16 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 17 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
| 18 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 19 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 20 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 21 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 22 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 23 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 24 | * SUCH DAMAGE. |
| 25 | */ |
| 26 | |
| 27 | #include <libelf.h> |
| 28 | |
| 29 | #include "_libelf.h" |
| 30 | |
| 31 | ELFTC_VCSID("$Id: elf_hash.c,v 1.1 2019/02/01 05:27:37 jsg Exp $"); |
| 32 | |
| 33 | /* |
| 34 | * This elf_hash function is defined by the System V ABI. |
| 35 | */ |
| 36 | |
| 37 | unsigned long |
| 38 | elf_hash(const char *name) |
| 39 | { |
| 40 | unsigned long h, t; |
| 41 | const unsigned char *s; |
| 42 | |
| 43 | s = (const unsigned char *) name; |
| 44 | h = t = 0; |
Although the value stored to 't' is used in the enclosing expression, the value is never actually read from 't' | |
| 45 | |
| 46 | for (; *s != '\0'; h = h & ~t) { |
| 47 | h = (h << 4) + *s++; |
| 48 | t = h & 0xF0000000UL; |
| 49 | if (t) |
| 50 | h ^= t >> 24; |
| 51 | } |
| 52 | |
| 53 | return (h); |
| 54 | } |