问题
How can I figure out whether it's a big-endian or little-endian file? I just tried to write a big-endian file with matlab but probably it didn't work. Now I want to learn if it is possible to learn what type it is. Any suggestion?
回答1:
Use FOPEN:
fileID = fopen(fileName)
[filename, permission, machineformat] = fopen(fileID)
The third output, machineformat, tells you whether it's big endian ('b') or little endian ('l').
回答2:
There's no way in general to know whether a given data file was created using big-endian or little-endian byte formatting. You would need to know something about the type of file it is (if it has a standard format that only ever uses one or the other) or the type of system the file was created on.
When you use fopen to open a file in MATLAB, you have to specify which endian format to use for that file using the machinefmt input argument. If you don't specify a format, MATLAB will use the native machine format by default (which won't be correct for files created on machines with different endian formats). This usage of fopen:
[filename, permission, machinefmt] = fopen(fileID);
Will simply tell you what endian format you used to open the file in the first place, which may or may not be correct for the given file.
来源：https://stackoverflow.com/questions/5187469/how-to-find-out-endianness-of-a-file