Just getting back into programming, stumped on this error message from some old code I wrote.  Function is determing size of memory to allocate.

struct runners * runner_alloc(struct runners *runmem_ptr, long *runsize_ptr,
FILE *runner_fp)
{
long file_size;

if( (fseek(runner_fp,(long) 0 ,SEEK_END)) != NULL)  ****** ERROR LINE ******
{
move_error("runners file");
}

file_size = ftell(runner_fp)/sizeof(struct runners);
rewind(runner_fp);

runmem_ptr = (struct runners *) malloc(file_size * sizeof(struct runners));

if( runmem_ptr == NULL)
mem_error("runners file");

if( fread(runmem_ptr,sizeof(struct runners),file_size,runner_fp) != file_size)
read_error("runners file");

*runsize_ptr = file_size;

return runmem_ptr;
}

ERROR MESSAGE!

"Need explicit cast to convert int to *void"

Any help appreciated.

Paul wrote:

> Just getting back into programming, stumped on this error message from some old code I wrote.  Function is determing size of memory to allocate.  
> 
> struct runners * runner_alloc(struct runners *runmem_ptr, long *runsize_ptr,
> FILE *runner_fp)
> {
> long file_size;
> 
> if( (fseek(runner_fp,(long) 0 ,SEEK_END)) != NULL)  ****** ERROR LINE ******
> {
> move_error("runners file");
> }
> 
> file_size = ftell(runner_fp)/sizeof(struct runners);
> rewind(runner_fp);
> 
> runmem_ptr = (struct runners *) malloc(file_size * sizeof(struct runners));
> 
> if( runmem_ptr == NULL)
> mem_error("runners file");
> 
> if( fread(runmem_ptr,sizeof(struct runners),file_size,runner_fp) != file_size)
> read_error("runners file");
> 
> *runsize_ptr = file_size;
> 
> return runmem_ptr;
> }
> 
> ERROR MESSAGE!
> 
> "Need explicit cast to convert int to *void"
> 

I see messages like this when there is failure to included the appropiate

header file declaring the function malloc, stdlib.h.



--------
Al Bowers
mailto: abowers.combase.com

There is insufficient information in your post. But typically such can be caused by calling a function that does not have a declaration for it in scope. -Walter

"Paul" <Paul_member@pathlink.com> wrote in message news:auj0n3$2cke$1@digitaldaemon.com...
> Just getting back into programming, stumped on this
> error message from some old code I wrote.  Function
> is determing size of memory to allocate.
>
> struct runners * runner_alloc(struct runners *runmem_ptr, long
*runsize_ptr,
> FILE *runner_fp)
> {
> long file_size;
>
> if( (fseek(runner_fp,(long) 0 ,SEEK_END)) != NULL)  ****** ERROR LINE
******
> {
> move_error("runners file");
> }
>
> file_size = ftell(runner_fp)/sizeof(struct runners);
> rewind(runner_fp);
>
> runmem_ptr = (struct runners *) malloc(file_size * sizeof(struct
runners));
>
> if( runmem_ptr == NULL)
> mem_error("runners file");
>
> if( fread(runmem_ptr,sizeof(struct runners),file_size,runner_fp) !=
file_size)
> read_error("runners file");
>
> *runsize_ptr = file_size;
>
> return runmem_ptr;
> }
>
> ERROR MESSAGE!
>
> "Need explicit cast to convert int to *void"
>
> Any help appreciated.
>
>

"Paul" <Paul_member@pathlink.com> wrote:

> Just getting back into programming, stumped on this
> error message from some old code I wrote.  Function
> is determing size of memory to allocate.
>
> struct runners * runner_alloc(struct runners *runmem_ptr, long *runsize_ptr,
> FILE *runner_fp)
> {
> long file_size;
>
> if( (fseek(runner_fp,(long) 0 ,SEEK_END)) != NULL)  ****** ERROR LINE ******

fseek() returns an int, not a pointer.

> ERROR MESSAGE!
>
> "Need explicit cast to convert int to *void"

Gisle V.

# rm /bin/laden
/bin/laden: Not found

Thanks for your help guys.  The below problem was solved
by changing the error line to:-  if( 0 == fseek(runner_fp,0L,SEEK_END))
as fseek returns an int!

Thanks for your help, its appreciated.



In article <aujcnn$2lct$1@digitaldaemon.com>, Walter says...
>
>There is insufficient information in your post. But typically such can be caused by calling a function that does not have a declaration for it in scope. -Walter
>
>"Paul" <Paul_member@pathlink.com> wrote in message news:auj0n3$2cke$1@digitaldaemon.com...
>> Just getting back into programming, stumped on this
>> error message from some old code I wrote.  Function
>> is determing size of memory to allocate.
>>
>> struct runners * runner_alloc(struct runners *runmem_ptr, long
>*runsize_ptr,
>> FILE *runner_fp)
>> {
>> long file_size;
>>
>> if( (fseek(runner_fp,(long) 0 ,SEEK_END)) != NULL)  ****** ERROR LINE
>******
>> {
>> move_error("runners file");
>> }
>>
>> file_size = ftell(runner_fp)/sizeof(struct runners);
>> rewind(runner_fp);
>>
>> runmem_ptr = (struct runners *) malloc(file_size * sizeof(struct
>runners));
>>
>> if( runmem_ptr == NULL)
>> mem_error("runners file");
>>
>> if( fread(runmem_ptr,sizeof(struct runners),file_size,runner_fp) !=
>file_size)
>> read_error("runners file");
>>
>> *runsize_ptr = file_size;
>>
>> return runmem_ptr;
>> }
>>
>> ERROR MESSAGE!
>>
>> "Need explicit cast to convert int to *void"
>>
>> Any help appreciated.
>>
>>
>
>