Implementing file reading in C/Python

[Johannes Bauer]

James Mills schrieb:

> I have tested this against a randomly generated
> file from /dev/urandom (10M). Yes the Python
> one is much slower, but I believe it's bebcause
> the Python implementation is _correct_ where
> teh C one is _wrong_ :)
> 
> The resulting test.bin.pgm from python is exactly
> 3.5M (from 10M). The resulting test.bin.pgm from
> the C version is 16K.
> 
> Something is not quite right here :)

Uhh, yes, you're right there... I must admit that I was too lazy to
include all the stat headers and to a proper st_size check in the C
version (just a quick hack), so it's practically hardcoded.

With files of exactly 2GB in size the results should be the same (more
or less, +- 1 line doesn't matter really), because 2 GB / 2048 (the
buffer) = 1 Million.

Sorry I didn't mention that, it was really kind of sloppy,
quick-and-dirty C writing on my part. But you're right, the Python
implementation does what is actually supposed to happen.

Kind regards,
Johannes

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