[gdal-dev] Redirect CPLDebug output?

[Jim Pendleton]

Is there any model for redirecting CPLDebug output from stdout to an
alternative path?

 

Since I have no command line or stdout in my Android activity where I
call GDAL as a library, "|" and ">" are not available.  

 

I'd like the option to send the output of CPLDebug to Android's LogCat
or even to an output file, if required.

 

I confess to being a C++ lightweight, in addition to having a lack of
expertise in GDAL, so port/cpl_port.h's syntax for CPL_PRINT_FUNC_FORMAT
at the root of the definition of CPLDebug has me flummoxed:

 

#define CPL_PRINT_FUNC_FORMAT( format_idx, arg_idx )
__attribute__((__format__ (__printf__, format_idx, arg_idx)))

 

The __android_log_print() function for sending output to the LogCat
stream is similar to printf(), but with two extra initial arguments that
I could in theory hardwire for my own purposes in an ifdef so existing
calls to CPL_DEBUG throughout GDAL would not need to be modified.

 

Conceptually, but not syntactically, in cpl_port.h I would like an
overriding definition something like this:

 

#if defined(__GNUC__) && __GNUC__ >= 3 && !defined(DOXYGEN_SKIP)

#ifdef ANDROID

#include <android/log.h>

#define CPL_PRINT_FUNC_FORMAT( format_idx, arg_idx )
__attribute__((__format__ (__android_log_print, ANDROID_LOG_DEBUG,
"GDAL", format_idx, arg_idx)))

#else

#define CPL_PRINT_FUNC_FORMAT( format_idx, arg_idx )
__attribute__((__format__ (__printf__, format_idx, arg_idx)))

...

 

As always, thanks for any assistance.

Jim P.

 

 

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