But firstly I have to write a program, that will convert this file to hex file.' You said: 'I' d like to upload file on server, for example pdf file. I still claim the exercise is a complete waste of time,since blobs can contain binary data: that's what blobs were invented for. He wants to convert his pdf file to its hex representation, as I see now, because he wants to put that file in a text blob field in some database table. After that, I will upload this file line by line with PL/SQL.ĮDIT: I completely misunderstood what the OP was aiming for. I'd like that the length of a line in hex file would be equal 1024. But firstly I have to write a program, that will convert this file to a hex file. I' d like to upload a file on server, for example a PDF file. After invoking this code I have still strange characters in my file_test file. N = fread(buffer, 1, bufferSize, source)

I have written something, but it does not work properly. I' d like to convert binary files to hex. If you want to put the result intoĪn array you could something like sprintf() to put your output into some buffer(s).I am trying to write some simple program to uploading files to my server. If you have any questions please feel free to let me know! Thanks in advance for all your help! I really do appreciate it!įgets(file_name, sizeof(file_name), stdin)

I hope my question and what I'm trying to do makes sense. txt file, but I want the hexadecimal values underneath (in other words a sort of hexdump of the file). I tried googling to see if others were trying to do the same thing, but people were either already reading from a binary file or already had hexadecimal values in the file. How can I structure this program so that it reads the hexadecimal values of a standard text file and either (a) puts them in an array (which I think should be simple enough with a for loop) or (b) prints them out to the screen?

However, the problem is that even though I'm in 'read binary' mode, it won't give me the hexadecimal values of the text file. Printf('The contents of %s file are : ', file_name) Īs you can see this is really just a simple file in, read and print contents. Perror('Error while opening the file. ') Printf('Enter the name of file you wish to see ') įp = fopen(file_name,'rb') // read binary mode txt file and not a binary file) and store it in an array for later. For example, say I had the text file 'helloworld.txt' that simply had the words 'Hello World!' in it, I want to specify to the program to take that file, read its hexidecimal values (again the file is a simple. I want to take in a file and view its hexadecimal values. I am writing a c program that functions much like a hex editor.

Convert file to hex for c