| crc.c (9b50d9027575220cb6dd09b3e62f03f511e908b8) | crc.c (4933ffaed9927902d8e810b6989996c0e1221321) |
|---|---|
| 1/*- 2 * Copyright (c) 1991, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * James W. Williams of NASA Goddard Space Flight Center. 7 * 8 * Redistribution and use in source and binary forms, with or without --- 27 unchanged lines hidden (view full) --- 36 37#ifndef lint 38static char sccsid[] = "@(#)crc.c 8.1 (Berkeley) 6/17/93"; 39#endif /* not lint */ 40 41#include <sys/types.h> 42#include <unistd.h> 43 | 1/*- 2 * Copyright (c) 1991, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * James W. Williams of NASA Goddard Space Flight Center. 7 * 8 * Redistribution and use in source and binary forms, with or without --- 27 unchanged lines hidden (view full) --- 36 37#ifndef lint 38static char sccsid[] = "@(#)crc.c 8.1 (Berkeley) 6/17/93"; 39#endif /* not lint */ 40 41#include <sys/types.h> 42#include <unistd.h> 43 |
| 44static u_long crctab[] = { | 44static const u_int32_t crctab[] = { |
| 45 0x0, 46 0x04c11db7, 0x09823b6e, 0x0d4326d9, 0x130476dc, 0x17c56b6b, 47 0x1a864db2, 0x1e475005, 0x2608edb8, 0x22c9f00f, 0x2f8ad6d6, 48 0x2b4bcb61, 0x350c9b64, 0x31cd86d3, 0x3c8ea00a, 0x384fbdbd, 49 0x4c11db70, 0x48d0c6c7, 0x4593e01e, 0x4152fda9, 0x5f15adac, 50 0x5bd4b01b, 0x569796c2, 0x52568b75, 0x6a1936c8, 0x6ed82b7f, 51 0x639b0da6, 0x675a1011, 0x791d4014, 0x7ddc5da3, 0x709f7b7a, 52 0x745e66cd, 0x9823b6e0, 0x9ce2ab57, 0x91a18d8e, 0x95609039, --- 44 unchanged lines hidden (view full) --- 97}; 98 99/* 100 * Compute a POSIX 1003.2 checksum. This routine has been broken out so that 101 * other programs can use it. It takes a file descriptor to read from and 102 * locations to store the crc and the number of bytes read. It returns 0 on 103 * success and 1 on failure. Errno is set on failure. 104 */ | 45 0x0, 46 0x04c11db7, 0x09823b6e, 0x0d4326d9, 0x130476dc, 0x17c56b6b, 47 0x1a864db2, 0x1e475005, 0x2608edb8, 0x22c9f00f, 0x2f8ad6d6, 48 0x2b4bcb61, 0x350c9b64, 0x31cd86d3, 0x3c8ea00a, 0x384fbdbd, 49 0x4c11db70, 0x48d0c6c7, 0x4593e01e, 0x4152fda9, 0x5f15adac, 50 0x5bd4b01b, 0x569796c2, 0x52568b75, 0x6a1936c8, 0x6ed82b7f, 51 0x639b0da6, 0x675a1011, 0x791d4014, 0x7ddc5da3, 0x709f7b7a, 52 0x745e66cd, 0x9823b6e0, 0x9ce2ab57, 0x91a18d8e, 0x95609039, --- 44 unchanged lines hidden (view full) --- 97}; 98 99/* 100 * Compute a POSIX 1003.2 checksum. This routine has been broken out so that 101 * other programs can use it. It takes a file descriptor to read from and 102 * locations to store the crc and the number of bytes read. It returns 0 on 103 * success and 1 on failure. Errno is set on failure. 104 */ |
| 105u_long crc_total = ~0; /* The crc over a number of files. */ | 105u_int32_t crc_total = ~0; /* The crc over a number of files. */ |
| 106 107int 108crc(fd, cval, clen) 109 register int fd; | 106 107int 108crc(fd, cval, clen) 109 register int fd; |
| 110 u_long *cval, *clen; | 110 u_int32_t *cval, *clen; |
| 111{ 112 register u_char *p; 113 register int nr; | 111{ 112 register u_char *p; 113 register int nr; |
| 114 register u_long crc, len; | 114 register u_int32_t crc, len; |
| 115 u_char buf[16 * 1024]; 116 117#define COMPUTE(var, ch) (var) = (var) << 8 ^ crctab[(var) >> 24 ^ (ch)] 118 119 crc = len = 0; 120 crc_total = ~crc_total; 121 while ((nr = read(fd, buf, sizeof(buf))) > 0) 122 for (len += nr, p = buf; nr--; ++p) { --- 18 unchanged lines hidden --- | 115 u_char buf[16 * 1024]; 116 117#define COMPUTE(var, ch) (var) = (var) << 8 ^ crctab[(var) >> 24 ^ (ch)] 118 119 crc = len = 0; 120 crc_total = ~crc_total; 121 while ((nr = read(fd, buf, sizeof(buf))) > 0) 122 for (len += nr, p = buf; nr--; ++p) { --- 18 unchanged lines hidden --- |