import cffi

import os

ffi = cffi.FFI()

with open(

    os.path.join(os.path.join(os.path.dirname(__file__), '..'), 'bdiff.c')

) as f:

    ffi.set_source(

        "mercurial.cffi._bdiff", f.read(), include_dirs=['mercurial']

    )

ffi.cdef(

    """

struct bdiff_line {

    int hash, n, e;

    ssize_t len;

    const char *l;

};

struct bdiff_hunk;

struct bdiff_hunk {

    int a1, a2, b1, b2;

    struct bdiff_hunk *next;

};

int bdiff_splitlines(const char *a, ssize_t len, struct bdiff_line **lr);

int bdiff_diff(struct bdiff_line *a, int an, struct bdiff_line *b, int bn,

    struct bdiff_hunk *base);

void bdiff_freehunks(struct bdiff_hunk *l);

void free(void*);

"""

)

if __name__ == '__main__':

    ffi.compile()