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    SubjectRE: [linux-pm] [PATCH] ACPI: replace strlen("string") with sizeof("string") -1
    Date
    Said it was a silly question.

    It's funny.

    I've been using "0123456789abcdef"[index] for a long time, so I "know"
    that "string" is a array of char, but it never occurred to me that
    "string" would work in sizeof() the same way as

    char string[] = { '0', '1', '2', '3', '4', '5', '6', '7',
    '8', '9', 'a', 'b', 'c', 'd', 'e', 'f', '\0' };

    int stringlength = sizeof(string);

    Learned something.

    Thanks,

    Dan


    > -----Original Message-----
    > From: Bernd Petrovitsch [mailto:bernd@petrovitsch.priv.at]
    > Sent: Tuesday, August 07, 2012 6:20 AM
    > To: Daniel Taylor
    > Cc: 'Alan Stern'; Pavel Vasilyev; Pavel Machek; Len Brown;
    > linux-acpi@vger.kernel.org;
    > linux-pm@lists.linux-foundation.org;
    > linux-kernel@vger.kernel.org; Len Brown
    > Subject: RE: [linux-pm] [PATCH] ACPI: replace
    > strlen("string") with sizeof("string") -1
    >
    > On Mon, 2012-08-06 at 22:57 +0000, Daniel Taylor wrote:
    > > Silly question: when did sizeof("string") get changed to
    > be anything
    > > other than the size of the pointer ("string" is, after all, an array
    > > of characters)?
    >
    > It is since K&R times that way.
    > If you do not know the difference between a pointer and an array (and
    > these are vastly different), go learn something new about C.
    >
    > Bernd
    > --
    > Bernd Petrovitsch Email : bernd@petrovitsch.priv.at
    > LUGA : http://www.luga.at
    >
    >

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