02-25-2008
Parsing Binary
I have a binary file a particular format.
It contains the Length Bytes and the Type bytes i.e the first four bytes if the file indicate the length of the Type which is to follow.
for eg, if the int value of the first four bytes is 80, then it means that the length of the following "Type" is 80. after i read the 80 bytes, the next four bytes again refer to the length of the next "Type"
I need to open the binary file, read the first four bytes, and then get the obtain the the bytes equaling the length obtained and keep doing this till the end of the file.
The problem i am having is that sometime the length of the file that it detects it wrong and that throws off the entire reading of the file
This is how i am reading the 4 bytes for length and then getting the long value
fread (Len, 1, 4, fp_bin);
long Length =(((((Len[0] << 8) + Len[1]) << 8) + Len[2]) << 8) + Len[3];
where Len is the char array containing the 4 bytes
this is how i am reading in the next 'Length' number of bytes
read(Data, 1, Length, fp_bin);
10 More Discussions You Might Find Interesting
1. UNIX for Dummies Questions & Answers
Hello,
I am configurating Sendmail on Mac OS 10.x terminal. I tried to execute m4 to generate a new sendmail.cf. It complains "Command not found". Anybody knows where the m4 binary is? Is it something coming along with Unix or Sendmail? Appreciate any help.
Thanks in advance.
pw (2 Replies)
Discussion started by: hypamw
2 Replies
2. UNIX for Dummies Questions & Answers
please let me know
how can i mail the binary files
is it can be done thru pine?
is there any other way to do it?
wat are the changes in system i have to make
and one more thing
i am sending data to a message queue and then retriving the data from the queue
but when i do the ipcs... (1 Reply)
Discussion started by: ramneek
1 Replies
3. UNIX for Dummies Questions & Answers
when using telnet localhost 25
I can cat ASCII files into the email body and an attachment,
but how do i get a non-ASCII file into it, like a picture or a word document (.doc not rtf).
uuencode, just stalls.
Any ideas?
:confused: (1 Reply)
Discussion started by: markms
1 Replies
4. Solaris
Hi,
I have two Solaris machines.
1. SunOS X 5.8 Generic_108528-29 sun4u sparc SUNW,Sun-Blade-1500
2. SunOS Y 5.8 Generic_108528-13 sun4u sparc SUNW,Ultra-60
I am trying to buiild a project on both these machines. The Binary output file compiled on machine 2 runs on both the machines. Where... (0 Replies)
Discussion started by: scgupta
0 Replies
5. Shell Programming and Scripting
#! /usr/local/bin/perl -w
$ip = "$ARGV";
$rw = "$ARGV";
$snmpg = "/usr/local/bin/snmpbulkget -v2c -Cn1 -Cn2 -Os -c $rw";
$snmpw = "/usr/local/bin/snmpwalk -Os -c $rw";
$syst=`$snmpg $ip system sysName sysObjectID`;
sysDescr.0 = STRING: Cisco Internetwork Operating System Software... (1 Reply)
Discussion started by: popeye
1 Replies
6. Shell Programming and Scripting
Hey guys,
I have this file generated by me... i want to create some HTML output from it.
The problem is that i am really confused about how do I go about reading the file.
The file is in the following format:
TID1 Name1 ATime=xx AResult=yyy AExpected=yyy BTime=xx BResult=yyy... (8 Replies)
Discussion started by: umar.shaikh
8 Replies
7. HP-UX
Hello,
2 questions:
1. is the binary "machinfo" installed by default on HP-UX servers?
2. which is the packet that installs "machinfo" ?
Thank you (1 Reply)
Discussion started by: asanchez
1 Replies
8. Shell Programming and Scripting
Hi ,
I have a binary in a variable and i want to invert it and store in a new variable. i mean, replace 0 with 1 and vice versa. I tried reading character by character with the below script but it didnt provide me the proper result.
#!/bin/bash
count=1
var1="00100011"
while ]
do
... (4 Replies)
Discussion started by: srinivasayedla
4 Replies
9. Solaris
Why would a binary which was compiled on a Solaris-10 not be runnable in a SunOS 5.10? (they are supposed to be precisely equivalent).
When I run the file command on it, it says:
ELF 32-bit LSB executable 80386 Version 1, dynamically linked, not stripped, no debugging information available... (10 Replies)
Discussion started by: steve701
10 Replies
10. Shell Programming and Scripting
Hello *nix specialists,
Im working for a non profit organisation in Germany to transport DSL over WLAN to people in areas without no DSL. We are using Linksys WRT 54 router with DD-WRT firmware There are at the moment over 180 router running but we have to change some settings next time. So my... (7 Replies)
Discussion started by: digidax
7 Replies
egd(3erl) Erlang Module Definition egd(3erl)
NAME
egd - egd - erlang graphical drawer.
DESCRIPTION
egd - erlang graphical drawer
DATA TYPES
color() :
egd_image() :
font() :
point() = {integer(), integer()} :
render_option() = {render_engine, opaque} | {render_engine, alpha} :
EXPORTS
color(Color::Value | Name) -> color()
Types Value = {byte(), byte(), byte()} | {byte(), byte(), byte(), byte()}
Name = black | silver | gray | white | maroon | red | purple | fuchia | green | lime | olive | yellow | navy | blue | teal |
aqua
Creates a color reference.
create(Width::integer(), Height::integer()) -> egd_image()
Creates an image area and returns its reference.
destroy(Image::egd_image()) -> ok
Destroys the image.
filledEllipse(Image::egd_image(), P1::point(), P2::point(), Color::color()) -> ok
Creates a filled ellipse object.
filledRectangle(Image::egd_image(), P1::point(), P2::point(), Color::color()) -> ok
Creates a filled rectangle object.
line(Image::egd_image(), P1::point(), P2::point(), Color::color()) -> ok
Creates a line object from P1 to P2 in the image.
rectangle(Image::egd_image(), P1::point(), P2::point(), Color::color()) -> ok
Creates a rectangle object.
render(Image::egd_image()) -> binary()
Equivalent to render(Image, png, [{render_engine, opaque}]) .
render(Image::egd_image(), Type::png | raw_bitmap) -> binary()
Equivalent to render(Image, Type, [{render_engine, opaque}]) .
render(Image::egd_image(), Type::png | raw_bitmap, Options::[render_option()]) -> binary()
Renders a binary from the primitives specified by egd_image(). The binary can either be a raw bitmap with rgb tripplets or a binary
in png format.
save(Binary::binary(), Filename::string()) -> ok
Saves the binary to file.
text(Image::egd_image(), P::point(), Font::font(), Text::string(), Color::color()) -> ok
Creates a text object.
AUTHORS
<>
percept 0.8.5 egd(3erl)