diff options
Diffstat (limited to 'usr/src/lib/libcmd/common/revlib.c')
| -rw-r--r-- | usr/src/lib/libcmd/common/revlib.c | 112 |
1 files changed, 0 insertions, 112 deletions
diff --git a/usr/src/lib/libcmd/common/revlib.c b/usr/src/lib/libcmd/common/revlib.c deleted file mode 100644 index 90b44a0128..0000000000 --- a/usr/src/lib/libcmd/common/revlib.c +++ /dev/null @@ -1,112 +0,0 @@ -/*********************************************************************** -* * -* This software is part of the ast package * -* Copyright (c) 1992-2010 AT&T Intellectual Property * -* and is licensed under the * -* Common Public License, Version 1.0 * -* by AT&T Intellectual Property * -* * -* A copy of the License is available at * -* http://www.opensource.org/licenses/cpl1.0.txt * -* (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9) * -* * -* Information and Software Systems Research * -* AT&T Research * -* Florham Park NJ * -* * -* Glenn Fowler <gsf@research.att.com> * -* David Korn <dgk@research.att.com> * -* * -***********************************************************************/ -#pragma prototyped -/* - * common support for tail and rev - */ - -#include <cmd.h> -#include <rev.h> - -#define BUFSIZE SF_BUFSIZE -#define rounddown(n,size) (((n)-1)&~((size)-1)) - -/* - * copy the lines starting at offset <start> from in <in> to <out> - * in reverse order - */ -int rev_line(Sfio_t *in, Sfio_t *out, off_t start) -{ - register char *cp, *cpold; - register int n, nleft=0; - char buff[BUFSIZE]; - off_t offset; - if(sfseek(in,(off_t)0,SEEK_CUR) < 0) - { - Sfio_t *tmp = sftmp(4*SF_BUFSIZE); - if(!tmp) - return(-1); - if(start>0 && sfmove(in, (Sfio_t*)0, start, -1) != start) - return(-1); - if(sfmove(in, tmp, SF_UNBOUND, -1) < 0 || !sfeof(in) || sferror(tmp)) - return(-1); - in = tmp; - start=0; - } - if((offset = sfseek(in,(off_t)0,SEEK_END)) <= start) - return(0); - offset = rounddown(offset,BUFSIZE); - while(1) - { - n = BUFSIZE; - if(offset < start) - { - n -= (start-offset); - offset = start; - } - sfseek(in, offset, SEEK_SET); - if((n=sfread(in, buff, n)) <=0) - break; - cp = buff+n; - n = *buff; - *buff = '\n'; - while(1) - { - cpold = cp; - if(nleft==0) - cp--; - if(cp==buff) - { - nleft= 1; - break; - } - while(*--cp != '\n'); - if(cp==buff && n!='\n') - { - *cp = n; - nleft += cpold-cp; - break; - } - else - cp++; - if(sfwrite(out,cp,cpold-cp) < 0) - return(-1); - if(nleft) - { - if(nleft==1) - sfputc(out,'\n'); - else if(sfmove(in,out,nleft,-1) != nleft) - return(-1); - nleft = 0; - } - } - if(offset <= start) - break; - offset -= BUFSIZE; - } - if(nleft) - { - sfseek(in, start, SEEK_SET); - if(sfmove(in,out,nleft,-1) != nleft) - return(-1); - } - return(0); -} |