X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=firmjni%2FREADME;h=7b342475086a2377ca002868722731ba37f87d4e;hb=a43b15ac7314af2946cbf5519f4f5e5cdc5f630e;hp=4695431bdfeeeaea776bd9fcedb5d81d1ccc1a0b;hpb=95af0a8da6ee81b607da91eab80cda44b2165768;p=libfirm

diff --git a/firmjni/README b/firmjni/README
index 4695431bd..7b3424750 100644
--- a/firmjni/README
+++ b/firmjni/README
@@ -1,23 +1,44 @@
 
+This directory contains tools to generate a Java Native Interface
+for libfirm.
 
-Call
-  sh build_firm_jni
-to generate a Java native interface for firm.
+The tools generate for each libfirm header file a Java class
+containing native method calls and static fields.  The native methods
+are derived from the methods in the corresponding libfirm header.  The
+method names are generated by replacing all occurences of '_x' by 'X'.
+(The libfirm headers may not contain method names that only differ by
+capitalizing the letter after an underscore.)
+The static fields are derived from the enumerators in libfirm.
+
+The generator copies the comments from the header files to the Java
+files.  Sometimes it places the comments slightly wrong, i.e. a bit
+too high or too low.  As the comments are directly copied they refer
+to the C names.
 
 Generating the JNI requires various syntactic properties of the
-header files that restrict legal C.
+header files that restrict legal C.  These restrictions will be
+relaxed at some point.
 
 Do not use methods that generate a non null terminated String
 from Idents (as idToStr).  This will probably cause a segmentation
 fault.
+Do not use methods that accept or return function pointers.
 
-Some methods generated might not work yet.  Please report this to
-goetz@ipd.info.uni-karlsruhe.de. Do not use methods with function
-pointers as arguments.
+Some other methods generated might not work yet.  Please report this to
+goetz@ipd.info.uni-karlsruhe.de.
 
+WARNING:
 For now _all_ enumerators are generated into _all_ classes.
 This results from deficiencies in the crecoder and will be removed
 at some place.
 Use only the enumerators defined in the corresponding c headers.
 E.g., irm_X is defined in irmode.h, so use Irmode.irm_X, but not
 Type.irm_X or any other definition in the java files.
+
+========================================================================
+
+Call
+  sh build_firm_jni
+to generate a Java native interface for firm.
+
+========================================================================