A mapping from TypeSpecifiers to Haskell types. Needed both to parse C types, and to convert them to Haskell types.

A data type to indicate whether the user requested pure or IO function from Haskell

Given a Context, it uses its ctxTypesTable to convert arbitrary C types.

An alias for Ptr.

An identifier for a AntiQuoter.

Existential wrapper around AntiQuoter.

A Context stores various information needed to produce the files with the C code derived from the inline C snippets.

Contexts can be composed with their Monoid instance, where mappend is right-biased -- in mappend x y y will take precedence over x.

Context useful to work with vanilla C. Used by default.

ctxTypesTable: converts C basic types to their counterparts in Foreign.C.Types.

No ctxAntiQuoters.

This Context adds support for ForeignPtr arguments. It adds a unique marshaller called fptr-ptr. For example, $fptr-ptr:(int *x) extracts the bare C pointer out of foreign pointer x.

This Context includes a AntiQuoter that removes the need for explicitely creating FunPtrs, named "fun" along with one which allocates new memory which must be manually freed named "fun-alloc".

For example, we can capture function f of type CInt -> CInt -> IO CInt in C code using $fun:(int (*f)(int, int)).

When used in a pure embedding, the Haskell function will have to be pure too. Continuing the example above we'll have CInt -> CInt -> IO CInt.

Does not include the baseCtx, since most of the time it's going to be included as part of larger contexts.

IMPORTANT: When using the fun anti quoter, one must be aware that the function pointer which is automatically generated is freed when the code contained in the block containing the anti quoter exits. Thus, if you need the function pointer to be longer-lived, you must allocate it and free it manually using freeHaskellFunPtr. We provide utilities to easily allocate them (see mkFunPtr).

IMPORTANT: When using the fun-alloc anti quoter, one must free the allocated function pointer. The GHC runtime provides a function to do this, hs_free_fun_ptr available in the h header.

This Context includes two AntiQuoters that allow to easily use Haskell vectors in C.

Specifically, the vec-len and vec-ptr will get the length and the pointer underlying mutable (IOVector) and immutable (Vector) storable vectors.

Note that if you use vecCtx to manipulate immutable vectors you must make sure that the vector is not modified in the C code.

To use vec-len, simply write $vec-len:x, where x is something of type IOVector a or Vector a, for some a. To use vec-ptr you need to specify the type of the pointer, e.g. $vec-len:(int *x) will work if x has type IOVector CInt.

Type class used to implement the anti-quoters in vecCtx.

bsCtx serves exactly the same purpose as vecCtx, but only for ByteString. vec-ptr becomes bs-ptr, and vec-len becomes bs-len. You don't need to specify the type of the pointer in bs-ptr, it will always be char*.

Moreover, bs-cstr works as bs-ptr but it provides a null-terminated copy of the given ByteString.