#include "Python.h"

#include "importdl.h"

#include <mach-o/dyld.h>

const struct filedescr _PyImport_DynLoadFiletab[] = {

{".so", "rb", C_EXTENSION},

{"module.so", "rb", C_EXTENSION},

{0, 0}

};

#ifdef USE_DYLD_GLOBAL_NAMESPACE

#define LINKOPTIONS NSLINKMODULE_OPTION_BINDNOW|NSLINKMODULE_OPTION_RETURN_ON_ERROR

#define LINKOPTIONS NSLINKMODULE_OPTION_BINDNOW| \

NSLINKMODULE_OPTION_RETURN_ON_ERROR|NSLINKMODULE_OPTION_PRIVATE

dl_funcptr _PyImport_GetDynLoadFunc(const char *fqname, const char *shortname,

const char *pathname, FILE *fp)

{

dl_funcptr p = NULL;

char funcname[258];

NSObjectFileImageReturnCode rc;

NSObjectFileImage image;

NSModule newModule;

NSSymbol theSym;

const char *errString;

char errBuf[512];

PyOS_snprintf(funcname, sizeof(funcname), "_init%.200s", shortname);

#ifdef USE_DYLD_GLOBAL_NAMESPACE

if (NSIsSymbolNameDefined(funcname)) {

theSym = NSLookupAndBindSymbol(funcname);

p = (dl_funcptr)NSAddressOfSymbol(theSym);

return p;

}

rc = NSCreateObjectFileImageFromFile(pathname, &image);

switch(rc) {

default:

case NSObjectFileImageFailure:

case NSObjectFileImageFormat:

/* for these a message is printed on stderr by dyld */

errString = "Can't create object file image";

break;

case NSObjectFileImageSuccess:

errString = NULL;

break;

case NSObjectFileImageInappropriateFile:

errString = "Inappropriate file type for dynamic loading";

break;

case NSObjectFileImageArch:

errString = "Wrong CPU type in object file";

break;

case NSObjectFileImageAccess:

errString = "Can't read object file (no access)";

break;

}

if (errString == NULL) {

newModule = NSLinkModule(image, pathname, LINKOPTIONS);

if (newModule == NULL) {

int errNo;

const char *fileName, *moreErrorStr;

NSLinkEditErrors c;

NSLinkEditError( &c, &errNo, &fileName, &moreErrorStr );

PyOS_snprintf(errBuf, 512, "Failure linking new module: %s: %s",

fileName, moreErrorStr);

errString = errBuf;

}

}

if (errString != NULL) {

PyErr_SetString(PyExc_ImportError, errString);

return NULL;

}

#ifdef USE_DYLD_GLOBAL_NAMESPACE

if (!NSIsSymbolNameDefined(funcname)) {

/* UnlinkModule() isn't implemented in current versions, but calling it does no harm */

NSUnLinkModule(newModule, FALSE);

PyErr_Format(PyExc_ImportError,

"Loaded module does not contain symbol %.200s",

funcname);

return NULL;

}

theSym = NSLookupAndBindSymbol(funcname);

theSym = NSLookupSymbolInModule(newModule, funcname);

if ( theSym == NULL ) {

NSUnLinkModule(newModule, FALSE);

PyErr_Format(PyExc_ImportError,

"Loaded module does not contain symbol %.200s",

funcname);

return NULL;

}

p = (dl_funcptr)NSAddressOfSymbol(theSym);

return p;

}