Need help simplifying this to hash lines of text file

[merclyn]

I was trying to use your code as a starting point to make a sha256 cuda hasher that takes lines from stdin (Or any text file) and hashes each line as a job (Outputing HASH and Original Line in the output separated by a space or other delimiter)

Your program is so close to doing this (You hash filesystem files), but my c++ is weak. Can you assist me? The way you read the files in for the –f switch, but instead of getting the file data from get_file_data, could you just hash the string?

[Horkyze]

Hi, of course you can!

Notice this line:

CudaSHA256/main.cu

Line 194 in adf4de7

jobs[i] = JOB_init(buff, temp, argv[index]);

buff stands for buffer and it's nothing else then a string. So you can pass in whatever you want.
If you dont know how to read input from stdin, I suggest you google that, there are a lot of good tutorials out there.

[merclyn]

I thought I tried that earlier, ill try it again.
In your code, if I passed in the variable line in place of buff, should I replace temp with strlen(line)? this is what I thought I did. Once I have it working with a string, I can easily get stdin working. Ill give it a shot later in the day.

Again, Thanks for the help.

[merclyn]

Im real close, but still cigar.

I added these 3 lines directly above the line 194 you refer to above:
buff = (BYTE *)"Hello";
checkCudaErrors(cudaMallocManaged(&buff, (5)*sizeof(char)));
jobs[i] = JOB_init(buff, 5, argv[index]);
and I get this hash:
8855508aade16ec573d21e6a485dfd0a7624085c1a14b5ecdd6485de0c6839a4 file.1
but I believe the hash is incorrect, because I compare it to:
$ echo -n "Hello" | sha256sum
and I get:
185f8db32271fe25f561a6fc938b2e264306ec304eda518007d1764826381969 -

I would expect the hash from both of those to match exactly.

BTW: If I dont cast buff to (BYTE *) then I get a compile error. Once I have this working with a simple string, ill be able to take it from there.

[merclyn]

I have some progress. I seem to need to better understand variable pointers in c++.

[Fyzjym]

Hello, may I ask for your help?

After I modify the code, I get an incorrect hash value.

			buff = (BYTE *)"abc";
			checkCudaErrors(cudaMallocManaged(&buff, (3)*sizeof(char)));
			jobs[i] = JOB_init(buff, 3, argv[index]);