comm.c revision 3e14f97f673e8a630f076077de35afdd43dc1587
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin/***********************************************************************
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin* This software is part of the ast package *
3e14f97f673e8a630f076077de35afdd43dc1587Roger A. Faulkner* Copyright (c) 1992-2010 AT&T Intellectual Property *
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin* and is licensed under the *
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin* Common Public License, Version 1.0 *
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin* by AT&T Intellectual Property *
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin* A copy of the License is available at *
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin* (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9) *
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin* Information and Software Systems Research *
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin* AT&T Research *
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin* Florham Park NJ *
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin* Glenn Fowler <gsf@research.att.com> *
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin* David Korn <dgk@research.att.com> *
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin***********************************************************************/
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin * David Korn
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin * AT&T Bell Laboratories
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chinstatic const char usage[] =
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin"[-?\n@(#)$Id: comm (AT&T Research) 1999-04-28 $\n]"
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin"[+NAME?comm - select or reject lines common to two files]"
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin"[+DESCRIPTION?\bcomm\b reads two files \afile1\a and \afile2\a "
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin "which should be ordered in the collating sequence of the "
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin "current locale, and produces three text columns as output:]{"
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin "[+1?Lines only in \afile1\a.]"
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin "[+2?Lines only in \afile2\a.]"
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin "[+3?Lines in both files.]"
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin"[+?If lines in either file are not ordered according to the collating "
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin "sequence of the current locale, the results are not specified.]"
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin"[+?If either \afile1\a or \afile2\a is \b-\b, \bcomm\b "
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin "uses standard input starting at the current location.]"
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin"[1?Suppress the output column of lines unique to \afile1\a.]"
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin"[2?Suppress the output column of lines unique to \afile2\a.]"
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin"[3?Suppress the output column of lines duplicate in \afile1\a and \afile2\a.]"
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin"\nfile1 file2\n"
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin"[+EXIT STATUS?]{"
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin "[+0?Both files processed successfully.]"
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin "[+>0?An error occurred.]"
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin"[+SEE ALSO?\bcmp\b(1), \bdiff\b(1)]"
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chinstatic int comm(Sfio_t *in1, Sfio_t *in2, register Sfio_t *out,register int mode)
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin return(-1);
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin else if(comp > 0)
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin return(-1);
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin return(-1);
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin return(0);
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin /* process the remaining stream */
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin return(-1);
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin return(0);
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin /* NOT REACHED */
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin register int n;
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin register char *cp;