flask-jamlib/jamlib_build.py

from cffi import FFI
ffibuilder = FFI()
import pathlib
this_dir = pathlib.Path().absolute()

# cdef() expects a single string declaring the C types, functions and
# globals needed to use the shared object. It must be in valid C syntax.
ffibuilder.cdef("""
typedef struct {
    FILE* HdrFile_PS;      /* File handle for .JHR file */
    FILE* TxtFile_PS;      /* File handle for .JDT file */
    FILE* IdxFile_PS;      /* File handle for .JDX file */
    FILE* LrdFile_PS;      /* File handle for .JLR file */
    int   Errno_I;	   /* last i/o error */
    int   Locked_I;	   /* is area locked? */
    uint32_t LastUserPos_I;   /* last position of lastread record */
    uint32_t LastUserId_I;    /* userid for the last read lastread record */
} s_JamBase;

int JAM_OpenMB ( char* Basename_PC, s_JamBase** NewArea_PPS );
int JAM_CloseMB ( s_JamBase* Area_PS );
""")

# int JAM_CloseMB         ( s_JamBase* 		Area_PS );
# 
# """)

# set_source() gives the name of the python extension module to
# produce, and some C source code as a string.  This C code needs
# to make the declarated functions, types and globals available,
# so it is often just the "#include".
ffibuilder.set_source("_pi_cffi",
"""
     #include "jam.h"   // the C header of the library
""",
     # libraries=['jamlib.a'],
     # library_dirs=[this_dir.as_posix()],
     # extra_link_args=["-Wl,-rpath,."],
     extra_link_args=["jamlib.a"],
     )   # library name, for the linker

if __name__ == "__main__":
    ffibuilder.compile(verbose=True)