return makes pointer from intger without a cast

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Fri, 2012-07-27 17:36

JosDuchIt

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return makes pointer from intger without a cast

I get the mentioned warning for the return below

void* findpath(const char *filename)
{
 
       if (IoErr() == ERROR_OBJECT_IN_USE)
         return -1;
 
 
 
}

The function is used as this #define ZERO ((BPTR)NULL) BPTR gcprog=ZERO; if ((gcprog = findpath("Gui4Cli")) != ((BPTR)-1)) I get the same warning though with with return (BPTR)-1; How can i get rid of it?

Fri, 2012-07-27 17:55

thomas

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If you declare your function

If you declare your function as returning a void* you need to cast to void*. If you want to cast to BPTR, you should declare your function as returning a BPTR. Generally you should declare your function as true as possible. So if you return a BPTR, declare it as BPTR. either void* findpath() { return (void*) -1; } or BPTR findpath() { return (BPTR) -1; }

Fri, 2012-07-27 20:41

corto

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JoshDuchIt: What findpath is

JoshDuchIt: What findpath is supposed to return ? A string ? If so, what about returning NULL and declaring the format of the return value as "char *" ? But maybe you want to distinguish the error case ERROR_OBJECT_IN_USE and others.

Wed, 2012-08-01 20:20

(Reply to #3) #4

JosDuchIt

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@thomas, thanks @corto What

@thomas, thanks @corto

What findpath is supposed to return ?

As shown in the usage of the function: BPTR gcprog=ZERO; and if ((gcprog = findpath("Gui4Cli")) != ((BPTR)-1)) findpath would be OK if it returned a BPTR I took over the suggestion of Thomas, and the stuff compiles OK now Thanks too

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