Re: Reading Adobe Photoshop header, Obj-C
Re: Reading Adobe Photoshop header, Obj-C
- Subject: Re: Reading Adobe Photoshop header, Obj-C
- From: Francis Devereux <email@hidden>
- Date: Tue, 28 Jun 2011 22:27:18 +0100
On 28 Jun 2011, at 18:00, Jens Alfke wrote:
> Another way (that I often use) is to define a C struct that matches the fields and layout of the header, then cast the bytes to a pointer to that struct and read the fields. It makes your code look a lot cleaner, but you have to be careful to (a) make sure the compiler packs the struct fields properly
You can do this with __attribute__((packed)) - see http://developer.apple.com/library/mac/#documentation/DeveloperTools/gcc-4.2.1/gcc/Type-Attributes.html. Be aware that __attribute__((packed)) is a GCC extension though, so it may not be supported by other compilers.
Francis
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