Re: [xmlvm-users] Maths

[Joseph R. F. <ruk...@op...>]

Hi, yes I did. I fixed the pow function name as suggested by Bjorn. I  
have managed to compile it, but fails during linking. Attached is my  
maths file and android source code.

The compile error I get is:

w.o obj/org_xmlvm_iphone_UITouch.o obj/org_xmlvm_iphone_UIView.o obj/ 
org_xmlvm_iphone_UIWindow.o obj/org_xmlvm_iphone_gl_BufferUtils.o obj/ 
org_xmlvm_iphone_gl_CAEAGLLayer.o obj/ 
org_xmlvm_iphone_gl_EAGLContext.o obj/ 
org_xmlvm_iphone_gl_EAGLDrawable.o obj/org_xmlvm_iphone_gl_GL.o obj/ 
org_xmlvm_iphone_gl_GLView.o obj/xmlvm.o
Undefined symbols:
   "_ERROR", referenced from:
       -[com_home_imageviewer_ImageViewer  
onCreate___android_os_Bundle:] in com_home_imageviewer_ImageViewer.o
       -[com_home_imageviewer_ImageViewer  
onCreate___android_os_Bundle:] in com_home_imageviewer_ImageViewer.o
ld: symbol(s) not found
collect2: ld returned 1 exit status
make: *** [build/test.app/test] Error 1





On 11/10/2009, at 6:09 PM, Wolfgang Korn wrote:

> Did you run the ant script to rebuild the library jars after  
> implementing these Math methods? If yes - please send me a patch  
> file with your implementation so that it is a little bit easier for  
> me to add things to my workspace. Then I will have a look at what's  
> going wrong and come back to as soon as possible.
>
> -- Wolfgang
>
>
> Joseph Rukshan Fonseka wrote:
>>
>> Ok I added these to java_lang_Math.m
>> + (float) pow___float: (float) x : (float) y
>> {
>>     return pow(x, y);
>> }
>>
>> + (double) pow___double: (double) x : (double) y
>> {
>>     return pow(x, y);
>> }
>> + (float) max___float_float :(float) x :(float) y
>> {
>>  return x < y ? y : x;
>> }
>>
>> + (double) max___double_double :(double) x :(double) y
>> {
>>  return x < y ? y : x;
>> }
>>
>> + (int) max___int_int :(int) x :(int) y
>> {
>>  return x < y ? y : x;
>> }
>>
>> + (float) min___float_float :(float) x :(float) y
>> {
>>  return x >  y ? y : x;
>> }
>>
>> + (double) min___double_double :(double) x :(double) y
>> {
>>  return x >  y ? y : x;
>> }
>>
>> + (int) min___int_int :(int) x :(int) y
>> {
>>  return x >  y ? y : x;
>> }
>>
>> and corresponding prototypes to the header file.
>>
>> However this android code:
>> public class ImageViewer extends Activity {
>>     /** Called when the activity is first created. */
>>     @SuppressWarnings("deprecation")
>>  @Override
>>     public void onCreate(Bundle savedInstanceState) {
>>         super.onCreate(savedInstanceState);
>>
>>         AbsoluteLayout layout = new AbsoluteLayout(this);
>>         layout.setLayoutParams(new LayoutParams 
>> (LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT));
>>         ImageView viewer = new ImageView(this);
>>         viewer.setImageResource(R.drawable.cat);
>>         layout.addView(viewer, new AbsoluteLayout.LayoutParams 
>> (AbsoluteLayout.LayoutParams.WRAP_CONTENT,  
>> AbsoluteLayout.LayoutParams.WRAP_CONTENT, 0, 100));
>>         TextView text = new TextView(this);
>>         layout.addView(text, new AbsoluteLayout.LayoutParams 
>> (AbsoluteLayout.LayoutParams.WRAP_CONTENT,  
>> AbsoluteLayout.LayoutParams.WRAP_CONTENT, 0, 0));
>>         setContentView(layout);
>>
>>         Math.pow(1.5,2*5);
>>         Math.min(1.2, 3.0);
>>         Math.max(3.4, 4.5);
>>     }
>> }
>>
>> However cross compiling to iphone give me this error message:
>> com_home_imageviewer_ImageViewer.m:131: warning: ‘java_lang_Math’  
>> may not respond to ‘+pow___double_double::’
>> com_home_imageviewer_ImageViewer.m:131: warning: (Messages without  
>> a matching method signature
>> com_home_imageviewer_ImageViewer.m:131: warning: will be assumed to  
>> return ‘id’ and accept
>> com_home_imageviewer_ImageViewer.m:131: warning: ‘...’ as arguments.)
>> com_home_imageviewer_ImageViewer.m:131: error: incompatible types  
>> in assignment
>> com_home_imageviewer_ImageViewer.m:133: warning: implicit  
>> declaration of function ‘ERROR’
>>
>>
>> I am pretty confident it is due to the Math functions I am calling  
>> at the end of my activity. Any idea what I am doing wrong?
>>
>>
>> On 09/10/2009, at 2:48 AM, Joseph Rukshan Fonseka wrote:
>>
>>> Ok I tried to convert an android application to iphone and noticed
>>> quite a few of the Maths functions don't compile such as
>>>
>>> Math.max()
>>> Math.min()
>>> Math.pow()
>>>
>>> I am guessing they aren't supported yet? I would like to extend the
>>> Maths library to have these functions. Which file should I be  
>>> looking
>>> at to add these?
>>>
>>> Regards,
>>> Rukshan Fonseka.
>>>
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>
>
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> Come build with us! The BlackBerry(R) Developer Conference in SF, CA
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> developing skills, take BlackBerry mobile applications to market and  
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