[Haskell-cafe] Ptr Word8 display question

Antoine Latter aslatter at gmail.com
Sun Jun 29 00:57:32 EDT 2008

2008/6/28 Galchin, Vasili <vigalchin at gmail.com>:
> Hi,
>     Suppose I have a value of type Ptr Word8 and also an Int which is the
> length of the Ptr Word8(sorry if I am thinking too much in a C string frame
> of mind). How can I display the Ptr Word8 value of the given length?
> Vasili

You're best bet would be to use 'peekArray' or 'withArrayLen' to get a
list of Word8 values, and then display that however you want.

withArrayLen: http://haskell.org/ghc/docs/latest/html/libraries/base/Foreign-Marshal-Array.html#v%3AwithArrayLen

peekArray: http://haskell.org/ghc/docs/latest/html/libraries/base/Foreign-Marshal-Array.html#v%3ApeekArray

I hope that helps!


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