Writing to a file from C

[David Given <dg@...>]

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I have a program that's storing data in specially-encoded strings.

I would like to write a function that massages the data and writes it out to a
file. Because this needs to be fast, it has to be done from C. But the file
has been opened from Lua and is a standard io.open() object.

Is there a (standard) way I can get the FILE* corresponding to an io object,
from C?

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