On Mar 9, 2007, at 6:30 PM, Tim Jones wrote:
> On Mar 9, 2007, at 2:22 PM, Charles Yeomans wrote:
>
>> On Mar 9, 2007, at 3:53 PM, Tim Jones wrote:
>>
>>> On Mar 9, 2007, at 1:41 PM, Charles Yeomans wrote:
>>>>>>> FILE * popen(const char *command, const char *type);
>>
>> Looking at fread, I'm not sure what the problem is; popen returns a
>> FILE*, and fread wants a FILE*. So all you need to do is to pass the
>> value returned from popen (unless it's null, of course) to fread or
>> fwrite and have at it.
>
> I guess my issue is the creation of the declare. How should the FILE
> return be defined?
>
> Soft Declare Function popen Lib "/usr/lib/libc.dylib" (cmd As
> CString, \
> mode As CString) As Ptr
>
> Then, how do I deal with that returned value?
Soft Declare Function popen Lib "System.framework" (cmd As CString, \
mode As CString) As Integer
Store it as an Integer, and declare subsequent functions to take an
Integer parameter as appropriate. In general, for functions that
return a pointer type, I just declare it as Integer unless I need to
do something different. That habit may be a little out of date,
though; the Ptr datatype now appears to work equally well in this
sort of case.
Charles Yeomans
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