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reading a file in hex

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Join Date: Jun 2007

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Daco

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reading a file in hex

Oct 13th, 2008

hey there everyone
i was working on a program of mine when that should read the file in hex and display the value of a certain hex address (0x000068FC as example).

but i have no clue where to begin except that ppl say it should work with fseek & fread
ive tried but i can't seem to work with it.
anyone might wanna help me with this?

thx
Daco

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Re: reading a file in hex

Oct 13th, 2008

post what you have tried. And post an example data file.

Don't PM me with questions -- you might get a nasty PM in response. If you have a question then post it in one of the forums.

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Daco

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Re: reading a file in hex

Oct 13th, 2008

i didn't post code cause i knew i was totally wrong >_<

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FILE *pFile;
char* buffer;
pFile = fopen("file.raw","rb");
//ill use the example address from original post
if(fseek(pFile, 0x000068FC, SEEK_SET)) 
{
//the 2 means to read 2 bytes right?
     fread(buffer,1,2,pFile);
fread(memory_card_content, 1, memory_card_size, pFile);
}
// final check to see what value buffer contains using command PanicAlert
PanicAlert("buffer = %x or %c",buffer,buffer");
 
FILE *pFile;
char* buffer;
pFile = fopen("file.raw","rb");
//ill use the example address from original post
if(fseek(pFile, 0x000068FC, SEEK_SET)) 
{
//the 2 means to read 2 bytes right?
     fread(buffer,1,2,pFile);
fread(memory_card_content, 1, memory_card_size, pFile);
}
// final check to see what value buffer contains using command PanicAlert
PanicAlert("buffer = %x or %c",buffer,buffer");

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Re: reading a file in hex

Oct 13th, 2008

Also please post actual text of the assignment, not how you interpreted it.

Don't PM me with questions -- you might get a nasty PM in response. If you have a question then post it in one of the forums.

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Daco

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Re: reading a file in hex

Oct 14th, 2008

this is the file it should read in the code.
if that is what you mean

Last edited by Daco; Oct 14th, 2008 at 5:57 am.

Attached Files

file.txt (2.00 MB, 7 views)

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Re: reading a file in hex

Oct 14th, 2008

That wasn't what I meant -- There must have been more the the instructions your teacher gave you what what you posted because what you posted doesn't make any sense. Post exactly the words given to you.

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Daco

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Re: reading a file in hex

Oct 14th, 2008

i dont follow coding classes. im doing this on my own.

ill explain all over again
when you hex edit a file you have a certain value on a certain address
for example you have value 04 on address 0x000068FC
my question was how do i check if hex address 0x000068FC has 04 as value

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Re: reading a file in hex

Oct 14th, 2008

where did you get that address from? 68FCH == 26876 decimal. If that's the byte offset in the file where that value is found, then you should be able to just seek to that position and read that byte.

Don't PM me with questions -- you might get a nasty PM in response. If you have a question then post it in one of the forums.