thank you Gian i did take a rest and read but alas it did not help
as far as i see it he is saying don't use binary file for fixed length
strings
but as this is an mp3 file tag witch i have no control i am doomed
On 18/07/17 19:22, Gianluigi wrote:
Why do not you take a moment of rest and read what Tobias Boege recommend
me in the discussion [0] I told you here [1]?
[0]
http://gambas.8142.n7.nabble.com/Random-access-files-with-fixed-length-string-td50880.html
[1] http://gambas.8142.n7.nabble.com/vb-code-td59764.html
2017-07-18 9:04 GMT+02:00 Shane <buster6se...@gmail.com>:
I am very confused from the docs
_Variable_ *= READ* [ *#* _Stream_ ] *AS* _Datatype_
_Variable_ *= READ* [ *#* _Stream_ *,* ] _Length_
so wouldn't it be_
_
IDtag = read #hfile as ID3v1_TAG ?
with doesn't work by the way
On 18/07/17 12:44, nand...@nothingsimple.com wrote:
I think
Read #hfile, IDtag, ID3v1_TAG
should be
Read #hfile, IDtag as ID3v1_TAG
--
Open WebMail Project (http://openwebmail.org)
---------- Original Message -----------
From: Shane <buster6se...@gmail.com>
To: gambas-user@lists.sourceforge.net
Sent: Tue, 18 Jul 2017 10:50:43 +1000
Subject: Re: [Gambas-user] reading files
i don't know what i am doing wrong
Public Struct ID3v1_TAG '(128 bytes)
Tag[3] As String 'always TAG
Title[30] As String 'title, 30 characters
Artist[30] As String 'artist, 30 characters
Album[30] As String 'album, 30 characters
Year[4] As String 'year, 4 characters
Comment[30] As String 'comment, 30 characters (or 28 if
track# included)
Genre As Byte 'genre, 255 for none defined
End Struct
Private Sub GetID3v1(File As String)
Dim IDtag As ID3v1_TAG
Dim hfile As File
hfile = Open File For Read
'
'read the tag
' seek to end of less tag size
Read #hfile, IDtag, ID3v1_TAG
here i get IDtag is NULL
On 18/07/17 05:05, nand...@nothingsimple.com wrote:
Yes it is possible, I do it. here is some code (incomplete)
-Nando (Canada)
' top of class file
Public Struct recstruc
_a as integer
_b as integer
_c as integer
end struct
' a function
public function openAfile(filename as string) as file
dim hfile as file
dim arec as recstruc
hfile = open filename for read write create
with arec 'some values to write.
._a = 1
._b = 22
._c = 333
end with
write #hfile, arec as recstruc
'if you position the hfile pointer back to zero, you can...
read #hfile, arec as recstruc
close #hfile
end
--
Open WebMail Project (http://openwebmail.org)
---------- Original Message -----------
From: T Lee Davidson <t.lee.david...@gmail.com>
To: gambas-user@lists.sourceforge.net
Sent: Sun, 16 Jul 2017 12:42:35 -0400
Subject: Re: [Gambas-user] reading files
On 07/16/2017 06:57 AM, Shane wrote:
given this example
PRIVATE SUB BinaryRead(FilePath AS String)
DIM binaryFile AS File
DIM i AS Integer
DIM b AS Byte
DIM s AS Short
DIM s1 AS String
DIM s2 AS String
' Read binary file
binaryFile = OPEN FilePath FOR READ
READ #binaryFile, i
READ #binaryFile, b
READ #binaryFile, s
READ #binaryFile, s1
READ #binaryFile, s2
CLOSE #binaryFile
' Display results
PRINT i
PRINT b
PRINT s
PRINT s1
PRINT s2
END
is there a way for gambas to read a struct of all these variables
in one read ?
You may have hinted at the solution within your question. Have you
considered
using a Structure?
http://gambaswiki.org/wiki/lang/read :
"... reads the stream Stream as binary data whose type is specified by
the
Datatype argument."
"The returned datatype can be one of the following: NULL, Boolean,
Byte, Short,
Integer, Long, Pointer, Single, Float, Date, String, Variant, any
Array,
Collection or structure."
http://gambaswiki.org/wiki/lang/structdecl
--
Lee
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