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Strange Warning...

Started by Galileo430 Dec 8, 2000 at 8:52 AM 5 replies 450+ views

Original Post

Dec 8, 2000 at 8:52 AM

I was wondering if this warning is a death blow or if it''s like a signed/unsigned mismatch, trivial?

  
global[nGifNumber]->entry = (struct COLORTABLE *)malloc( gdata[nGifNumber].nGCTSize * 3 );

C:\My Documents\C++\gifinter\gifinter.c(316) : warning C4133: ''='' : incompatible types - from ''struct COLORTABLE *'' to ''struct RGBTRIPLET *''

TwoFlower

Dec 8, 2000 at 9:16 AM

What type is global[nGifNumber]->entry ?
It should be struct COLORTABLE * since that''s what you are casting to.

Galileo430

Author

Galileo430

Dec 8, 2000 at 9:48 AM

these are the structs

  
struct RGBTRIPLET
{
    unsigned char byRed;
    unsigned char byGreen;
    unsigned char byBlue;
};

struct COLORTABLE
{
     RGBTRIPLET *entry;
};

the Dealy Lama

Dec 8, 2000 at 9:56 AM

so, if Global[nGifNumber]->entry is of type RGBTRIPLET *, why are you casting the malloc() to type COLORTABLE *? they are different data types, as one contains three unsigned chars, and the other contains a pointer (long)..

Gruad the Dealy Lama

"What sounds to you like a big bloat of trashy old noise
is in fact the brilliant music of a genius--myself" ~ Iggy Pop

Galileo430

Author

Galileo430

Dec 8, 2000 at 9:16 PM

Don''t look at me, I''m a C++ programmer... I don''t use malloc..

TwoFlower

Dec 8, 2000 at 10:17 PM

quote:
Original post by Galileo430

Don''t look at me, I''m a C++ programmer... I don''t use malloc..

Duh? You''re original code post uses malloc. What are you talking about? Are you mad?

If global[nGifNumber]->entry is not a pointer to a COLORTABLE then you''re code doesn''t make sense and will produce an error.

Galileo430

Author

Galileo430

Dec 9, 2000 at 9:09 AM

Ops.. ::smacks self in head::

I am so stupid!

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