forked from osmocom/wireshark
8ed7a73e22
Cast away some implicit 64-bit-to-32-bit conversion errors due to use of sizeof. Cast away some implicit 64-bit-to-32-bit conversion errors due to use of strtol() and strtoul(). Change some data types to avoid those implicit conversion warnings. When assigning a constant to a float, make sure the constant isn't a double, by appending "f" to the constant. Constify a bunch of variables, parameters, and return values to eliminate warnings due to strings being given const qualifiers. Cast away those warnings in some cases where an API we don't control forces us to do so. Enable a bunch of additional warnings by default. Note why at least some of the other warnings aren't enabled. randpkt.c and text2pcap.c are used to build programs, so they don't need to be in EXTRA_DIST. If the user specifies --enable-warnings-as-errors, add -Werror *even if the user specified --enable-extra-gcc-flags; assume they know what they're doing and are willing to have the compile fail due to the extra GCC warnings being treated as errors. svn path=/trunk/; revision=46748
62 lines
1.9 KiB
C
62 lines
1.9 KiB
C
/* adler32.c
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* Compute the Adler32 checksum (RFC 1950)
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* 2003 Tomas Kukosa
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* Based on code from RFC 1950 (Chapter 9. Appendix: Sample code)
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*
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* $Id$
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*
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* Wireshark - Network traffic analyzer
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* By Gerald Combs <gerald@wireshark.org>
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* Copyright 1998 Gerald Combs
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include <string.h>
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#include <glib.h>
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#include <epan/adler32.h>
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#define BASE 65521 /* largest prime smaller than 65536 */
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/*--- update_adler32 --------------------------------------------------------*/
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guint32 update_adler32(guint32 adler, const guint8 *buf, size_t len)
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{
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guint32 s1 = adler & 0xffff;
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guint32 s2 = (adler >> 16) & 0xffff;
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size_t n;
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for (n = 0; n < len; n++) {
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s1 = (s1 + buf[n]) % BASE;
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s2 = (s2 + s1) % BASE;
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}
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return (s2 << 16) + s1;
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}
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/*--- adler32 ---------------------------------------------------------------*/
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guint32 adler32_bytes(const guint8 *buf, size_t len)
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{
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return update_adler32(1, buf, len);
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}
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/*--- adler32_str -----------------------------------------------------------*/
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guint32 adler32_str(const char *buf)
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{
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return update_adler32(1, (const guint8*)buf, strlen(buf));
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}
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/*---------------------------------------------------------------------------*/
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