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238 lines
6.4 KiB
C
238 lines
6.4 KiB
C
/****************************************************************
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Copyright 1990, 1993, 1994 by AT&T Bell Laboratories and Bellcore.
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Permission to use, copy, modify, and distribute this software
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and its documentation for any purpose and without fee is hereby
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granted, provided that the above copyright notice appear in all
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copies and that both that the copyright notice and this
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permission notice and warranty disclaimer appear in supporting
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documentation, and that the names of AT&T Bell Laboratories or
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Bellcore or any of their entities not be used in advertising or
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publicity pertaining to distribution of the software without
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specific, written prior permission.
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AT&T and Bellcore disclaim all warranties with regard to this
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software, including all implied warranties of merchantability
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and fitness. In no event shall AT&T or Bellcore be liable for
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any special, indirect or consequential damages or any damages
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whatsoever resulting from loss of use, data or profits, whether
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in an action of contract, negligence or other tortious action,
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arising out of or in connection with the use or performance of
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this software.
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****************************************************************/
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#define _POSIX_SOURCE
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#include "stdio.h"
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#ifndef KR_headers
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#include "stdlib.h"
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#include "sys/types.h"
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#include "fcntl.h" /* for declaration of open, O_RDONLY */
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#include "unistd.h" /* for read, close */
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#endif
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#ifdef MSDOS
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#include "io.h"
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#endif
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#ifndef O_RDONLY
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#define O_RDONLY 0
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#endif
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#ifndef O_BINARY
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#define O_BINARY O_RDONLY
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#endif
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char *progname;
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static int ignore_cr;
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void
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#ifdef KR_headers
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usage(rc)
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#else
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usage(int rc)
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#endif
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{
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fprintf(stderr, "usage: %s [-r] [file [file...]]\n\
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option -r ignores carriage return characters\n", progname);
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exit(rc);
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}
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typedef unsigned char Uchar;
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long
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#ifdef KR_headers
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sum32(sum, x, n)
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register long sum;
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register Uchar *x;
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int n;
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#else
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sum32(register long sum, register Uchar *x, int n)
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#endif
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{
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register Uchar *xe;
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static long crc_table[256] = {
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0, 151466134, 302932268, 453595578,
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-9583591, -160762737, -312236747, -463170141,
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-19167182, -136529756, -321525474, -439166584,
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28724267, 145849533, 330837255, 448732561,
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-38334364, -189783822, -273059512, -423738914,
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47895677, 199091435, 282375505, 433292743,
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57448534, 174827712, 291699066, 409324012,
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-67019697, -184128295, -300991133, -418902539,
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-76668728, -227995554, -379567644, -530091662,
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67364049, 218420295, 369985021, 520795499,
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95791354, 213031020, 398182870, 515701056,
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-86479645, -203465611, -388624945, -506380967,
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114897068, 266207290, 349655424, 500195606,
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-105581387, -256654301, -340093543, -490887921,
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-134039394, -251295736, -368256590, -485758684,
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124746887, 241716241, 358686123, 476458301,
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-153337456, -2395898, -455991108, -304803798,
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162629001, 11973919, 465560741, 314102835,
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134728098, 16841012, 436840590, 319723544,
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-144044613, -26395347, -446403433, -329032703,
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191582708, 40657250, 426062040, 274858062,
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-200894995, -50223749, -435620671, -284179369,
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-172959290, -55056048, -406931222, -289830788,
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182263263, 64630089, 416513267, 299125861,
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229794136, 78991822, 532414580, 381366498,
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-220224191, -69691945, -523123603, -371788549,
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-211162774, -93398532, -513308602, -396314416,
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201600371, 84090341, 503991391, 386759881,
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-268078788, -117292630, -502591472, -351526778,
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258520357, 107972019, 493278217, 341959839,
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249493774, 131713432, 483432482, 366454964,
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-239911657, -122417791, -474129349, -356881235,
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-306674912, -457198666, -4791796, -156118374,
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315967289, 466778031, 14362133, 165418627,
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325258002, 442776452, 23947838, 141187752,
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-334573813, -452329571, -33509849, -150495567,
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269456196, 419996626, 33682024, 184992510,
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-278767779, -429561909, -43239823, -194312473,
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-288089226, -405591072, -52790694, -170046772,
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297394031, 415166457, 62373443, 179343061,
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383165416, 533828478, 81314500, 232780370,
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-373594127, -524527769, -72022307, -223201717,
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-401789990, -519431348, -100447498, -217810336,
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392228803, 510123861, 91131631, 208256633,
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-345918580, -496598246, -110112096, -261561802,
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336361365, 487278339, 100800185, 251995695,
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364526526, 482151208, 129260178, 246639108,
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-354943065, -472854735, -119955829, -237064675,
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459588272, 308539942, 157983644, 7181066,
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-469170519, -317835713, -167286907, -16754925,
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-440448382, -323454444, -139383890, -21619912,
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450006683, 332774925, 148697015, 31186721,
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-422325548, -271261118, -186797064, -36011154,
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431888077, 280569435, 196114401, 45565815,
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403200742, 286222960, 168180682, 50400092,
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-412770561, -295522711, -177471533, -59977915,
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-536157576, -384970002, -234585260, -83643454,
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526853729, 375396087, 225003341, 74348507,
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517040714, 399923932, 215944038, 98057200,
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-507728301, -390357307, -206385281, -88735767,
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498987548, 347783818, 263426864, 112501670,
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-489671163, -338229613, -253864151, -103192641,
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-479823314, -362722632, -244835582, -126932076,
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470531639, 353144481, 235265819, 117632909
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};
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xe = x + n;
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while(x < xe)
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sum = crc_table[(sum ^ *x++) & 0xff] ^ (sum >> 8 & 0xffffff);
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return sum;
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}
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int
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#ifdef KR_headers
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cr_purge(buf, n)
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Uchar *buf;
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int n;
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#else
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cr_purge(Uchar *buf, int n)
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#endif
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{
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register Uchar *b, *b1, *be;
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b = buf;
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be = b + n;
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while(b < be)
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if (*b++ == '\r') {
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b1 = b - 1;
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while(b < be)
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if ((*b1 = *b++) != '\r')
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b1++;
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return b1 - buf;
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}
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return n;
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}
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static Uchar Buf[16*1024];
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void
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#ifdef KR_headers
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process(s, x)
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char *s;
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int x;
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#else
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process(char *s, int x)
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#endif
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{
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register int n;
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long fsize, sum;
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sum = 0;
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fsize = 0;
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while((n = read(x, (char *)Buf, sizeof(Buf))) > 0) {
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if (ignore_cr)
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n = cr_purge(Buf, n);
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fsize += n;
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sum = sum32(sum, Buf, n);
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}
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sum &= 0xffffffff;
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if (n==0)
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printf("%s\t%lx\t%ld\n", s, sum & 0xffffffff, fsize);
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else { perror(s); }
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close(x);
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}
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#ifdef KR_headers
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main(argc, argv)
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char **argv;
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#else
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main(int argc, char **argv)
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#endif
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{
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int x;
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char *s;
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static int rc;
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progname = *argv;
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argc = argc; /* turn off "not used" warning */
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s = *++argv;
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if (s && *s == '-') {
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switch(s[1]) {
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case '?':
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usage(0);
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case 'r':
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ignore_cr = 1;
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case '-':
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break;
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default:
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fprintf(stderr, "invalid option %s\n", s);
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usage(1);
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}
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s = *++argv;
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}
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if (s) do {
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x = open(s, O_RDONLY|O_BINARY);
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if (x < 0) {
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fprintf(stderr, "%s: can't open %s\n", progname, s);
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rc |= 1;
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}
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else
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process(s, x);
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}
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while(s = *++argv);
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else {
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process("/dev/stdin", fileno(stdin));
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}
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return rc;
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}
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