On Sunday, 6 January 2013 at 10:21:56 UTC, bearophile wrote:
MrOrdinaire:
My question is how this function declaration is written in D.
int av_image_alloc(uint8_t *pointers[4], int linesizes[4],
int w, int h, enum AVPixelFormat pix_fmt,
int align);
My best guess is the following.
extern(C) int av_image_alloc(ref uint8_t[4] *pointers, ref
int[4] linesizes,
int w, int h, AVPixelFormat
pix_fmt, int align_);
D ints are 32 bit long, while the length of C ints varies
across different architectures. So you can't use int in your D
signature. sizediff_t is better, but I remember there is a more
specific type for this purpose, something like cint_t, I don't
remember.
In D the pointer symbol "*" is better (more meaningful) written
justified on the right.
If you use a D ref, you can't put a null there.
Others will give you a better answer.
Bye,
bearophile
Thank you for your reply.
I cannot find "cint_t" nor "cint" in the d standard modules (mine
are at /usr/include/d/).
For the symbol "*", do you mean I should write something like
this?
uint8_t[4]* ptrs
- Minh
