CODEWITHSUNDEEP
cc-preprocessorstringification
user48956
user48956

Reputation: 15794

How to cause macro expansion before concatenation?

#define JNI_DECLARE( classname, methodname ) \
     classname  ## methodname( JNI* env ) 

#define JAVA_CLASS Java_com_example
void JNI_DECLARE( JAVA_CLASS, open ) {}

This expands to:

void JAVA_CLASS_open( JNI* env ) {}

How do I get:

void Java_com_example_open( JNI* env ) {}

?

Upvotes: 13

Views: 3066

Answers (1)

Karoly Horvath
Karoly Horvath

Reputation: 96258

#define JNI_DECLARE_INNER( classname, methodname ) \
     classname  ## _ ## methodname( JNI* env )
#define JNI_DECLARE( classname, methodname ) \
     JNI_DECLARE_INNER(classname, methodname)

see more here: C Preprocessor, Stringify the result of a macro

Upvotes: 15

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