|Bill Allombert on Fri, 26 Aug 2011 14:11:09 +0200|
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|Re: embedding GP in GUI applications (android-port)|
On Wed, Aug 24, 2011 at 10:50:10PM -0400, Charles Boyd wrote: > Hello, > > I have produced a statically compiled GP binary for Android, and now want to > build a light graphical application to improve the usability of PARI/GP on > Android <https://code.google.com/p/paridroid/>. > > Android applications are written in Java, and may interface with native > C/C++ functions via the Java Native Interface (JNI). > > Is there a relatively simple way to send commands for evaluation by GP from > an external application? There is a distinction to make between the gp programm and the GP interpreter. The gp programm is a standalone exectutable that provide an interface to the GP interpretor which is included in libpari. In the context of a graphical application you probably want to use the GP interpreter directly since gp mostly provide the text-based user interface which you do not need. > For example, if it is possible to embed the GP interpreter in a C program > (similar to Python embedding <http://www.linuxjournal.com/article/8497>) -- > then I could write a small wrapper library in C that interfaces with GP and > then load this library in the Java GUI application via JNI. For example, > this library would provide simple functions...roughly prototyped as: Yes, you can embed the GP interpretor in your C program, since the GP interpretor is part of the libpari library. See examples/minigp.c in the distribution for an example. Basically you do out = gp_read_str(in); where 'in' is the input and 'out' is the output. You can convert 'out' to a char * using GENtostr. Cheers, Bill.