🚀 go-pugleaf

I think I've found a bug in GNU sed-1.09.  Here is how to reproduce
the bug:


$ echo 1 > tester
$ echo 2 >> tester
$ echo 3 >> tester
$ gsed --version
GNU sed version 1.09
Usage: gsed [-nV] [--quiet] [--silent] [--version] [-e script]
        [-f script-file] [--expression=script] [--file=script-file] [file...]
$ gsed -e "1,1s/^/BEGIN /" tester
BEGIN 1
BEGIN 2
3
$ /bin/sed -e "1,1s/^/BEGIN /" tester
BEGIN 1
2
3
$ uname -a
HP-UX labejb B.08.00 B 9000/350 08000902bacf



Note that the sed script specified "starting at line number 1, and
ending at line number 1, substitute the string 'BEGIN ' at the start
of the line".  However, what happened is GNU sed did the substitution
on the first two lines.  This behavior is unexpected and is different
from what the sed on HP-UX 8.0 does.

The following patch appears to fix the problem:

*** sed.c.orig	Fri Sep 25 13:18:49 1992
--- sed.c	Fri Sep 25 14:33:51 1992
***************
*** 504,511 ****
  		}
  		if (   cur_cmd->a1.addr_type == ADDR_NUM
  		    && cur_cmd->a2.addr_type == ADDR_NUM
! 		    && cur_cmd->a2.addr_number <= cur_cmd->a1.addr_number)
! 		  cur_cmd->a2.addr_number = cur_cmd->a1.addr_number+1;
  
  		ch=inchar();
  		if(ch==EOF)
--- 504,511 ----
  		}
  		if (   cur_cmd->a1.addr_type == ADDR_NUM
  		    && cur_cmd->a2.addr_type == ADDR_NUM
! 		    && cur_cmd->a2.addr_number < cur_cmd->a1.addr_number)
! 		  cur_cmd->a2.addr_number = cur_cmd->a1.addr_number;
  
  		ch=inchar();
  		if(ch==EOF)
***************
*** 1062,1068 ****
  		} else if(match_address(&(cur_cmd->a1))) {
  			addr_matched=1;
  			if(cur_cmd->a2.addr_type!=ADDR_NULL)
! 				cur_cmd->aflags|=A1_MATCHED_BIT;
  		}
  		if(cur_cmd->aflags&ADDR_BANG_BIT)
  			addr_matched= !addr_matched;
--- 1062,1069 ----
  		} else if(match_address(&(cur_cmd->a1))) {
  			addr_matched=1;
  			if(cur_cmd->a2.addr_type!=ADDR_NULL)
! 				if(!match_address(&(cur_cmd->a2)))
! 					cur_cmd->aflags|=A1_MATCHED_BIT;
  		}
  		if(cur_cmd->aflags&ADDR_BANG_BIT)
  			addr_matched= !addr_matched;

--
				Eric Backus
				ericb%hplsla@hplabs.hp.com
				(206) 335-2495