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GlueGen Revised Struct Mapping (esp pointer to array or single element), Struct String Charset, .. and Documentation
- Documentation:
- Added README.md
Let's have a proper face for the git repo
- Added doc/GlueGen_Mapping.md (and its html conversion doc/GlueGen_Mapping.html)
Created a new document covering application and implementation details suitable for users/devs.
- Added doc/JogAmpMacOSVersions.md conversion to doc/JogAmpMacOSVersions.html
- Updated www/index.html
- Use *CodeUnit instead of PrintWriter, representing a Java or C code unit covering a set of functions and structs.
The CCodeUnit also handles common code shared by its unit across functions etc.
- Dropping 'static initializer', as its no more required
due to simplified `JVMUtil_NewDirectByteBufferCopy()` variant.
- Revised Struct Mapping:
- Pure Java implementation to map primitive and struct fields within a struct
by utilizing ElementBuffer.
Only 'Function Pointer' fields within a struct require native code.
Exposes `static boolean usesNativeCode()` to query whether native code is used/required.
- Transparent native memory address API
Expose `long getDirectBufferAddress()` and `static TK_Struct derefPointer(long addr)`,
allowing to
- pass the native struct-pointer with native code
- reconstruct the struct from a native struct-pointer
- have a fully functional `TK_Struct.derefPointer(struct.getDirectBufferAddress())` cycle.
- Add 'boolean is<Val>Null() to query whether a pointer (array) is NULL
- *Changed* array get/set method for more flexibility alike `System.arraycopy(src, srcPos, dest, destPos, len)`,
where 'src' is being dropped for the getter and 'dest' is being dropped for the setter
as both objects are reflected by the struct instance.
- *Changed* `get<Val>ArrayLength()` -> `get<Val>ElemCount()` for clarity
- Considering all ConstElemCount values with config 'ReturnedArrayLength <int>'
to be owned by native code -> NativeOwnership -> Not changing the underlying memory region!
JavaOwnership is considered for all pointer-arrays not of NativeOwnership.
Hence any setter on a NativeOwnership pointer-array will fail with non-matching elem-count.
- Add 'release<Val>()' for JavaOwnership pointer-arrays,
allowing to release the Java owned native memory incl. null-ing pointer and set<Val>ElemCount(0).
- Support setter for 'const <type>*' w/ JavaOwnership, i.e. pointer to const value of a primitive or struct,
setter and getter using pointer to array or single element in general.
- Added Config `ImmutableAccess symbol` to disable all setter for whole struct or a field
- Added Config `MaxOneElement symbol` to restrict a pointer to maximum one element and unset
initial value (zero elements)
- Added Config `ReturnsStringOnly symbol` to restrict mapping only to a Java String,
dropping the ByteBuffer variant for 'char'
- String mapping default is UTF-8 and can be read and set via [get|set]Charset(..) per class.
- Dynamic string length retrieval in case no `ReturnedArrayLength` has been configured
has changed from `strlen()` to `strnlen(aptr, max_len)` to be on the safe site.
The maximum length default is 8192 bytes and can be read and set via [get|set]MaxStrnlen(..) per class.
FIXME: strnlen(..) using EOS byte non-functional for non 8-bit codecs like UTF-8, US-ASCII.
This is due to e.g. UTF-16 doesn't use an EOS byte, but interprets it as part of a code point.
- TODO: Perhaps a few more unit tests
- TODO: Allow plain 'int' to be mapped in structs IFF their size is same for all MachineDescriptions used.
Currently this is the case -> 4 bytes like int32_t.
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