X-Git-Url: https://git.whamcloud.com/?a=blobdiff_plain;f=libcfs%2Flibcfs%2Fposix%2Fposix-adler.c;fp=libcfs%2Flibcfs%2Fposix%2Fposix-adler.c;h=0000000000000000000000000000000000000000;hb=3f90f344ae059b30e7d23e4fe554a985eb827b02;hp=36931d4fa9a664b1c36d842c03313e0f47122007;hpb=020924966d4acd98e96ede094d72a49b762233db;p=fs%2Flustre-release.git diff --git a/libcfs/libcfs/posix/posix-adler.c b/libcfs/libcfs/posix/posix-adler.c deleted file mode 100644 index 36931d4..0000000 --- a/libcfs/libcfs/posix/posix-adler.c +++ /dev/null @@ -1,83 +0,0 @@ -/* Copyright (C) 1995-2005 Jean-loup Gailly and Mark Adler - - This software is provided 'as-is', without any express or implied - warranty. In no event will the authors be held liable for any damages - arising from the use of this software. - - Permission is granted to anyone to use this software for any purpose, - including commercial applications, and to alter it and redistribute it - freely, subject to the following restrictions: - - 1. The origin of this software must not be misrepresented; you must not - claim that you wrote the original software. If you use this software - in a product, an acknowledgment in the product documentation would be - appreciated but is not required. - 2. Altered source versions must be plainly marked as such, and must not be - misrepresented as being the original software. - 3. This notice may not be removed or altered from any source distribution. - - Jean-loup Gailly Mark Adler - jloup@gzip.org madler@alumni.caltech.edu - - - The data format used by the zlib library is described by RFCs (Request for - Comments) 1950 to 1952 in the files http://www.ietf.org/rfc/rfc1950.txt - (zlib format), rfc1951.txt (deflate format) and rfc1952.txt (gzip format). -*/ -#include - - -#define BASE 65521L /* largest prime smaller than 65536 */ -#define NMAX 5552 -/* NMAX is the largest n such that 255n(n+1)/2 + (n+1)(BASE-1) <= 2^32-1 */ - -#define DO1(buf, i) {s1 += buf[i]; s2 += s1; } -#define DO2(buf, i) DO1(buf, i); DO1(buf, i + 1); -#define DO4(buf, i) DO2(buf, i); DO2(buf, i + 2); -#define DO8(buf, i) DO4(buf, i); DO4(buf, i + 4); -#define DO16(buf) DO8(buf, 0); DO8(buf, 8); - -/* ========================================================================= */ -/* - Update a running Adler-32 checksum with the bytes buf[0..len-1] and - return the updated checksum. If buf is NULL, this function returns - the required initial value for the checksum. - An Adler-32 checksum is almost as reliable as a CRC32 but can be computed - much faster. Usage example: - - uLong adler = adler32(0L, NULL, 0); - - while (read_buffer(buffer, length) != EOF) { - adler = adler32(adler, buffer, length); - } - if (adler != original_adler) error(); -*/ -unsigned long zlib_adler32(unsigned long adler, - const unsigned char *buf, - unsigned int len) -{ - unsigned long s1 = adler & 0xffff; - unsigned long s2 = (adler >> 16) & 0xffff; - int k; - - if (buf == NULL) - return 1L; - - while (len > 0) { - k = len < NMAX ? len : NMAX; - len -= k; - while (k >= 16) { - DO16(buf); - buf += 16; - k -= 16; - } - if (k != 0) - do { - s1 += *buf++; - s2 += s1; - } while (--k); - s1 %= BASE; - s2 %= BASE; - } - return (s2 << 16) | s1; -}