Posted on May 17, 2011 at 09:49Hi,
I use the KEIL Realview MDK-ARM
I want to define a functionpointer in the __FILE struct (stdio.h).
By changing this functionpointer in my mainprogram I can redirect stdout to some device.
To do this I changed the file retarget.c to following
#include
extern ''C'' {
struct __FILE {
int handle;
int *(*stdoutProc)(int ch); //THIS IS THE FUNCTIONPOINTER I CREATED
};
FILE __stdout;
FILE __stdin;
InitStdOut(int *MyStdOut(int Ch)) {
__stdout.stdoutProc = MyStdOut;
}
int fputc (int ch, FILE *f) {
__stdout.stdoutProc(ch);
return(ch);
}
} //extern C
I did not test the code, so maybe the code doesn't do the thing I want to do, but however I can compile it without errors !
When I rename all the files to *.cpp, to use the compilers C++ extentions, I have the error (at the line FILE __stdout;)
error #70: incomplete type is not allowed
How can I add a functionpointer to the __FILE struct in C++ environment ????
Thank you !
