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Found and fixed a nasty array overrun problem.

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git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/branches/wsjtx@6730 ab8295b8-cf94-4d9e-aec4-7959e3be5d79
This commit is contained in:
Steven Franke 2016-06-05 16:40:45 +00:00
parent f7572dcc4e
commit 31d393cd45
2 changed files with 4 additions and 7 deletions
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3
lib/msk144_decode.f90
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@ -58,8 +58,7 @@ subroutine msk144_decode(id2,npts,nutc,nprint,line)
iz=ib-ia+1
cdat2(1:iz)=c(ia:ib) !Select nlen complex samples
t0=ia/12000.0
call syncmsk144(cdat2,iz,metric,msg,freq)
if(metric.eq.-9999) cycle !No output if no significant sync
call syncmsk144(cdat2,iz,msg,freq)
if(msg(1:1).ne.' ') then
! if(msg.ne.msg0) then
nline=nline+1

8
lib/syncmsk144.f90
View File

@ -1,4 +1,4 @@
subroutine syncmsk144(cdat,npts,metric,msgreceived,fest)
subroutine syncmsk144(cdat,npts,msgreceived,fest)
use iso_c_binding, only: c_loc,c_size_t
use packjt
use hashing
@ -25,7 +25,6 @@ subroutine syncmsk144(cdat,npts,metric,msgreceived,fest)
integer*1, allocatable :: message(:)
integer*1 i1hashdec
integer ipeaks(10)
integer metric
logical ismask(6000)
real cbi(42),cbq(42)
real tonespec(6000)
@ -42,7 +41,6 @@ subroutine syncmsk144(cdat,npts,metric,msgreceived,fest)
data s8/0,1,1,1,0,0,1,0/
save first,cb,pi,twopi,dt,f0,f1
! save
if(first) then
! These files can be found in /lib/ldpc/jtmode_codes directory
pchk_file="peg-128-80-reg3.pchk"
@ -136,7 +134,6 @@ subroutine syncmsk144(cdat,npts,metric,msgreceived,fest)
dd(max(1,ic2-7):min(npts-56*6-41,ic2+7))=0.0
enddo
! See if we can find "closed brackets" - a pair of peaks that differ by 864, plus or minus
! This information is not yet used for anything
do ii=1,5
@ -206,7 +203,7 @@ subroutine syncmsk144(cdat,npts,metric,msgreceived,fest)
fest=1500+ferr+ferr2
! Remove fine frequency error
call tweak1(c,npts,-ferr2,c)
call tweak1(c,NSPM,-ferr2,c)
! Estimate final frequency error and carrier phase.
cca=sum(c(1:1+41)*conjg(cb))
@ -268,6 +265,7 @@ subroutine syncmsk144(cdat,npts,metric,msgreceived,fest)
if( niterations .ge. 0.0 ) then
goto 778
endif
enddo
enddo
enddo