chromium/third_party/zlib/adler32.c

/* adler32.c -- compute the Adler-32 checksum of a data stream
 * Copyright (C) 1995-2011, 2016 Mark Adler
 * For conditions of distribution and use, see copyright notice in zlib.h
 */

/* @(#) $Id$ */

#include "zutil.h"

#define BASE …
#define NMAX …
/* NMAX is the largest n such that 255n(n+1)/2 + (n+1)(BASE-1) <= 2^32-1 */

#define DO1(buf,i) …
#define DO2(buf,i) …
#define DO4(buf,i) …
#define DO8(buf,i) …
#define DO16(buf) …

/* use NO_DIVIDE if your processor does not do division in hardware --
   try it both ways to see which is faster */
#ifdef NO_DIVIDE
/* note that this assumes BASE is 65521, where 65536 % 65521 == 15
   (thank you to John Reiser for pointing this out) */
#define CHOP …
#define MOD28 …
#define MOD …
#define MOD63 …
#else
#define MOD(a) …
#define MOD28(a) …
#define MOD63(a) …
#endif

#include "cpu_features.h"
#if defined(ADLER32_SIMD_SSSE3) || defined(ADLER32_SIMD_NEON) || defined(ADLER32_SIMD_RVV)
#include "adler32_simd.h"
#endif

/* ========================================================================= */
uLong ZEXPORT adler32_z(uLong adler, const Bytef *buf, z_size_t len) { … }

/* ========================================================================= */
uLong ZEXPORT adler32(uLong adler, const Bytef *buf, uInt len) { … }

/* ========================================================================= */
local uLong adler32_combine_(uLong adler1, uLong adler2, z_off64_t len2) { … }

/* ========================================================================= */
uLong ZEXPORT adler32_combine(uLong adler1, uLong adler2, z_off_t len2) { … }

uLong ZEXPORT adler32_combine64(uLong adler1, uLong adler2, z_off64_t len2) { … }