comparison mercurial/cext/revlog.c @ 44502:166349510398

revlog: using two new functions in C capsule from Rust code

We expose `index_length` and `index_node` in the C capsule, so that
the Rust representation of the C index can implement the `RevlogIndex`
trait.

Because our `Node` is actually a one-field struct, we have
to decorate it for direct FFI exchange with the C `char*`

It would be a good thing to get a length from the C layer, but doing
so right now would probably interfere with the upcoming changes that
will happen there for the hash length.

Differential Revision: https://phab.mercurial-scm.org/D8152

44501:87b327de772c

	int children[16];
} nodetreenode;

typedef struct {
	int abi_version;
	int (*index_parents)(PyObject *, int, int *);
} Revlog_CAPI;

/*
 * A base-16 trie for fast node->rev mapping.

}

static Revlog_CAPI CAPI = {
    /* increment the abi_version field upon each change in the Revlog_CAPI
       struct or in the ABI of the listed functions */
    1,
    HgRevlogIndex_GetParents,
};

void revlog_module_init(PyObject *mod)
{

44502:166349510398

	int children[16];
} nodetreenode;

typedef struct {
	int abi_version;
	Py_ssize_t (*index_length)(const indexObject *);
	const char *(*index_node)(indexObject *, Py_ssize_t);
	int (*index_parents)(PyObject *, int, int *);
} Revlog_CAPI;

/*
 * A base-16 trie for fast node->rev mapping.

}

static Revlog_CAPI CAPI = {
    /* increment the abi_version field upon each change in the Revlog_CAPI
       struct or in the ABI of the listed functions */
    2,
    index_length,
    index_node,
    HgRevlogIndex_GetParents,
};

void revlog_module_init(PyObject *mod)
{