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Read binary files of big sizes

 
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Helen Yu



Joined: 18 Jan 2007
Posts: 3

PostPosted: Mon Jan 29, 2007 4:57 pm    Post subject: Read binary files of big sizes Reply with quote

Hi,

I have a question using FTN95 version 4.9.

We are currently experiencing read large binary files that individual file size exceeds 4.0GB. From the manual/electronic documentation, integer definitions involved in functions such as FILE_SIZE@ and FPOS@ are defined as KIND=3(see definition of SIZE, POSITION, NEW_POSITION etc). This causes incorrect values returned.

As Integer (KIND=4) have been introduced, does this integer data type apply to the above mentioned functions and how does it work? I have tried to use Integer*8 SIZE in calling FILE_SIZE@ and it worked in one of my test case. However, I need to get confirmation from Silverfrost on the definitions of integer types regarding to such kind of issues.

In addition, I am interested to get information on technical support and charges.

Thanks

Helen Yu


FILE_SIZE@(FILE, SIZE, ERROR_CODE).
CHARACTER (LEN = *) FILE
INTEGER (KIND = 3) SIZE
INTEGER (KIND = 2) ERROR_CODE

FPOS@(HANDLE, POSITION, NEW_POSITION, ERROR_CODE)
INTEGER (KIND = 2) HANDLE, ERROR_CODE
INTEGER (KIND = 3) POSITON, NEW_POSITION
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PaulLaidler
Site Admin


Joined: 21 Feb 2005
Posts: 5044
Location: Salford, UK

PostPosted: Tue Jan 30, 2007 1:39 pm    Post subject: Reply with quote

Helen

FTN95 is a Win32/.NET compiler with only limited support for INTEGER*8 values.

With few exceptions, FTN95 implementations of standard Fortran routines and special FTN95 library routines do not support INTEGER*8 values.

In order to read etc. large files you would need to access the file handling functions of the Windows API. See ftn95.chm and "Using the Windows API".

For information on support and charges, contact Silverfrost by using the email address given in their website.
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