forums.silverfrost.com

[JohnyBergmann]

The following program does not correctly detect the number of characters transferred during the nonadvancing read
[pre]
program readlen_1
implicit none
integer length, ios
character(len=5):: c

open(10,file="test.txt")
write(10,"(A)") "1"
write(10,"(A)") "22"
write(10,"(A)") "333"
write(10,"(A)") "4444"
write(10,"(A)") "55555"
write(10,"(A)") "666666"
write(10,"(A)") "7777777"
write(10,"(A)") "88888888"
close(10)

open(10, file="test.txt")

ios = 0
do while(ios == 0 .or. ios == -2)
read(10,"(A)", advance="NO",size=length,iostat=ios) c
if (ios == -2) then
print *,"EOR :",c,":", len_trim(c), length
elseif(ios == 0) then
print *," :",c,":", len_trim(c), length
endif
enddo

end program readlen_1
[/pre]
The output should show "length" to be equal to len_trim but it is always zero except when 5 characters could be read
This is the expected outpu
[pre]
EOR :1 : 1 1
EOR :22 : 2 2
EOR :333 : 3 3
EOR :4444 : 4 4
:55555: 5 5
EOR : : 0 0
:66666: 5 5
EOR :6 : 1 1
:77777: 5 5
EOR :77 : 2 2
:88888: 5 5
EOR :888 : 3 3
[/pre]
and this is what I get with ftn95 readlen_1.f90 /lgo:
[pre]
EOR :1 : 1 0
EOR :22 : 2 0
EOR :333 : 3 0
EOR :4444 : 4 0
:55555: 5 5
EOR : : 0 0
:66666: 5 5
EOR :6 : 1 0
:77777: 5 5
EOR :77 : 2 0
:88888: 5 5
EOR :888 : 3 0
[/pre]

P.S. Just to say I'm not looking for this bugs on purpose. I'm porting a library of Fortran 77 code to Fortran 95 and trying to use a xml library (written in Fortran 95) with my Fortran programs. With both projects I'm currently experiencing a certain number of issues, and some of them I can trace back to problems with FTN95


Johny

[PaulLaidler]

Johny

Thanks for this. We will aim to investigate the problem as soon as we can.

[Martin]

This problem has now been fixed ready for the next release of FTN95.