How to write and read a binary file?
BlitzMax Forums/BlitzMax Programming/How to write and read a binary file?
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| Hi, I am trying to learn how to write and read a binary file. This binary file would need to store a string e.g. "Hello World" and I would need to retrieve it from the file in my code. Does anybody know how to do this and would care to give me a hand? Thanks a lot best regards |
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| ReadStream() WriteStream() OpenStream() stream.WriteString() stream.WriteInt() ... Hopefully this are enough keywords to make your search results containing something useful. A potential hit in google might be this: https://en.wikibooks.org/wiki/BlitzMax/Modules/Streams/Streams bye Ron |
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| Hi Ron, Thanks a lot for your help. I came up with these lines of codes. They give me the correct sequences of Hexadecimal values when I compare with my file (opened in an Hex editor online). This binary file was generated from Excel VBA. How would I put all of this data back into a string? Sorry for the newbish questions...binary files are new territory to me. Thank you for your help. Best regards
filename:TStream=ReadStream("chanson.strum")
While Not Eof(filename)
Print Hex(ReadByte(filename))
Wend
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filename:TStream=ReadStream("chanson.strum")
While Not Eof(filename)
strin$:+chr(ReadByte(filename))
Wend
print strinor if you like a very long sequence of numeric values... strin$:+ReadByte(filename) |
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| Just be aware: reading a byte at a time is a LOT slower than reading a string at a time, so unless you really need the single byte you may want to skip that. (Alternatively: you can also use LoadBank to load an entire file into a memory bank, and then parse that a byte at a time if needed -- faster than telling the hard drive to load a byte at a time.) |
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| Guys, Thanks a lot for your help! I decided to drop the RC4 encryption for the Vernam encryption algorithm that I found on this site. It works like a charm! Many thanks for helping me making progress. Until next time. ;-) Cheers |
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