Reading in from .raw file

This is a discussion on Reading in from .raw file within the C Programming forums, part of the General Programming Boards category; I got an assignment where i have to read in unsigned short values from a .raw file. Im abit unsure ...

  1. #1
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    Reading in from .raw file

    I got an assignment where i have to read in unsigned short values from a .raw file. Im abit unsure on how i do this in C and what i get when i do it like i have tried to do

    http://pastebin.com/NNQDitWe
    Code:
    void main()
    {
            //data is also an usnigned *short declared somewhere else in the program
            data = ReadFile();
    }
     
    unsigned short* ReadFile()
    {
     
    FILE *file = fopen("Kaisa.raw", "r");
    if(!file)
    {
            return NULL;
           
            unsigned short* value = (unsigned short*)malloc(512*512*210*sizeof(unsigned short*));
            fread(value, 512*512*210, 1, file);
            fclose(file);
           
            return value;
     
    }
    First of all, does this work?

    If so what and how is the values stored in data. Is the numbers all in one line(that is 512*512*210 elements long)?
    Last edited by sidesprang; 04-23-2010 at 06:38 PM.

  2. #2
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    Since your listing does not include any header files, the answer has to be "NO", it doesn't work.

    In general, if you have a hammer in your hand, you don't need to ask all your neighbors if it will work or not. Just try hammering in a nail or two, and you'll know.

  3. #3
    and the Hat of Guessing tabstop's Avatar
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    There's not One True ".raw" Format. That is to say, just saying your data is in a file labeled .raw doesn't tell us what's in the file.

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    Quote Originally Posted by tabstop View Post
    There's not One True ".raw" Format. That is to say, just saying your data is in a file labeled .raw doesn't tell us what's in the file.
    K, i've never used .raw files before did not really know how they worked. When i tried to open one in notepad++ i got just garbage. But i noticed there was another file that also was in my assignment. Kaisa.mhd. I guess that one has the information of what is in the file.
    Code:
    NDims = 3 
    BinaryData = True 
    BinaryDataByteOrderMSB = False 
    Offset = -103.604 -114.96 0.0
    ElementSpacing = 0.449 0.449 1.000 
    DimSize = 512 512 210
    ElementType = MET_USHORT 
    ElementDataFile = Kaisa.raw

  5. #5
    and the Hat of Guessing tabstop's Avatar
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    What's probably wrong with your fread is that you are trying to read 512*512*210 pointers to ushort, when you would want 512*512*210 ushorts instead.

    Searching on ".mhd file extension" gives interesting reading about MetaImage, but I don't know if it will help.

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