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| From | "D. Aaron Sawyer" <aaron@110.net> |
|---|---|
| Newsgroups | comp.lang.c |
| Subject | Re: Question |
| Date | 2016-07-28 13:55 -0300 |
| Organization | Hardly any |
| Message-ID | <nndddp$8th$1@dont-email.me> (permalink) |
| References | <nnd8ue$nnp$2@dont-email.me> |
On 2016.07.28 12:38, DFS wrote:
> Take a C structure:
>
> struct imageType {
> imageOpsType *ops;
> coordType width;
> coordType height;
> int32_t depth; /* 1..32 */
> int32_t linebytes; /* bytes per line */
> int32_t allocated; /* bytes allocated */
> int64_t fill; /* color to fill with */
> int8_t sign;
> imageType *primary; /* for secondary, assoc primary */
> coordType primaryX; /* for secondary, offset in primary */
> coordType primaryY; /* for secondary, offset in primary */
> int8_t *data;
> uint32_t flags; /* image access mode(s) */
> int32_t verbose;
> int32_t page; /* number of the current page */
> double resX; /* pixels per unit in X */
> double resY; /* pixels per unit in Y */
> int32_t resUnit; /* 0=nores 1=unk 2=inch 3=cm */
> char modes[MAX_MODES]; /* modes used with open */
> char name[MAX_NAME];
> int64_t clientData[CLIENT_SIZE]; };
>
>
> What does the following statement accomplish, given that
> "image" and "src" are both pointers to imageType?
>
> (*(imageType**)&(image)->clientData[0])=(src)
>
>
>
> Thanks for help.
>
What is sizeof (imageType *) ?
What is sizeof int64_t ?
If they are different:
At best, you will get a compiler warning or error.
At worst, you get a silent corruption of clientData.
If they are the same:
Good luck with that.
=Aaron
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Question DFS <nospam@dfs.com> - 2016-07-28 11:38 -0400
Re: Question Melzzzzz <mel@zzzzz.com> - 2016-07-28 17:50 +0200
Re: Question BartC <bc@freeuk.com> - 2016-07-28 17:49 +0100
Re: Question Melzzzzz <mel@zzzzz.com> - 2016-07-28 18:52 +0200
Re: Question Keith Thompson <kst-u@mib.org> - 2016-07-28 11:58 -0700
Re: Question BartC <bc@freeuk.com> - 2016-07-28 20:57 +0100
Re: Question "D. Aaron Sawyer" <aaron@110.net> - 2016-07-28 13:55 -0300
Re: Question Barry Schwarz <schwarzb@dqel.com> - 2016-07-28 11:38 -0700
Re: Question DFS <nospam@dfs.com> - 2016-07-28 15:20 -0400
Re: Question Tim Rentsch <txr@alumni.caltech.edu> - 2016-07-30 09:24 -0700
Re: Question Ian Collins <ian-news@hotmail.com> - 2016-07-29 07:23 +1200
Re: Question James Kuyper <jameskuyper@verizon.net> - 2016-07-28 16:05 -0400
Re: Question DFS <nospam@dfs.com> - 2016-07-29 10:14 -0400
Re: Question "James R. Kuyper" <jameskuyper@verizon.net> - 2016-07-30 14:45 -0400
Re: Question supercat@casperkitty.com - 2016-08-01 05:19 -0700
Re: Question Tim Rentsch <txr@alumni.caltech.edu> - 2016-07-30 09:17 -0700
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