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#include <Python.h>
#include "pgf.h"
#define NEWOBJECT(OBJ, GFTYPE) typedef struct {\
PyObject_HEAD \
GFTYPE obj; \
} OBJ;
#define NEWTYPE(TYPE,NAME,OBJECT,DOC) static PyTypeObject TYPE = {\
PyObject_HEAD_INIT(NULL)\
0, /*ob_size*/\
NAME, /*tp_name*/\
sizeof(OBJECT), /*tp_basicsize*/\
0, /*tp_itemsize*/\
0, /*tp_dealloc*/\
0, /*tp_print*/\
0, /*tp_getattr*/\
0, /*tp_setattr*/\
0, /*tp_compare*/\
0, /*tp_repr*/\
0, /*tp_as_number*/\
0, /*tp_as_sequence*/\
0, /*tp_as_mapping*/\
0, /*tp_hash */\
0, /*tp_call*/\
0, /*tp_str*/\
0, /*tp_getattro*/\
0, /*tp_setattro*/\
0, /*tp_as_buffer*/\
Py_TPFLAGS_DEFAULT, /*tp_flags*/\
DOC, /* tp_doc */\
};
#define NEWGF(OBJ,GFTYPE,TYPE,NAME,DOC) NEWOBJECT(OBJ,GFTYPE) \
NEWTYPE(TYPE,NAME,OBJ,DOC)
#ifdef DEBUG
#define DEALLOCFN(delname,t,cb,cbname) static void \
delname(t *self){ cb(self->obj);\
printf("gf_%s has been called for stable pointer 0x%x\n", cbname, self->obj);\
self->ob_type->tp_free((PyObject*)self); }
#else
#define DEALLOCFN(delname,t,cb,cbname) static void \
delname(t *self){ cb(self->obj);\
self->ob_type->tp_free((PyObject*)self); }
#endif
#ifdef DEBUG
#define REPRCB(cbid,t,gfcb) static PyObject* \
cbid(t *self) { \
const char *str = gfcb(self->obj); \
return PyString_FromFormat("0x%x: %s", self->obj, str); }
#else
#define REPRCB(cbid,t,gfcb) static PyObject* \
cbid(t *self) { \
const char *str = gfcb(self->obj); \
return PyString_FromString(str); }
#endif
/* utilities */
int
checkType(PyObject* obj, PyTypeObject* tp)
{
int isRight = PyObject_TypeCheck(obj, tp);
if (!isRight)
PyErr_Format(PyExc_TypeError, "Expected a %s", tp->tp_doc);
return isRight;
}
/* new types and declarations */
NEWGF(Lang,GF_Language,LangType,"gf.lang","language")
NEWGF(gfType,GF_Type,gfTypeType,"gf.type","gf type")
NEWGF(PGFModule,GF_PGF,PGFType,"gf.pgf","PGF module")
NEWGF(Expr,GF_Expr,ExprType,"gf.expr","gf expression")
NEWGF(Tree,GF_Tree,TreeType,"gf.tree","gf tree")
/* PGF methods, constructor and destructor */
DEALLOCFN(PGF_dealloc, PGFModule, gf_freePGF, "freePGF")
static gfType*
startCategory(PyObject *self, PyObject *noarg)
{
gfType *cat;
if (!checkType(self, &PGFType)) return NULL;
cat = (gfType*)gfTypeType.tp_new(&gfTypeType,NULL,NULL);
cat->obj = gf_startCat(((PGFModule*)self)->obj);
return cat;
}
static PyObject*
parse(PyObject *self, PyObject *args, PyObject *kws)
{
PyObject *lang_pyob, *cat_pyob = NULL;
GF_PGF pgf;
GF_Language lang;
GF_Type cat;
char *lexed;
static char *kwlist[] = {"lexed", "lang", "cat", NULL};
if (!PyArg_ParseTupleAndKeywords(args, kws, "sO|O", kwlist,
&lexed, &lang_pyob, &cat_pyob))
return NULL;
if (!checkType(self, &PGFType)) return NULL;
if (!checkType(lang_pyob, &LangType)) return NULL;
if (cat_pyob) {
if (!checkType(cat_pyob, &gfTypeType)) return NULL;
cat = ((gfType*)cat_pyob)->obj;
} else {
cat = startCategory(self,NULL)->obj;
}
pgf = ((PGFModule*)self)->obj;
lang = ((Lang*)lang_pyob)->obj;
PyObject *parsed = PyList_New(0);
GF_Tree *p = gf_parse(pgf,lang,cat,lexed);
if (*p) {
do {
Tree* expr; //Expr
expr = (Tree*)TreeType.tp_new(&TreeType,NULL,NULL); // Expr* -> Tree*
expr->obj = *(p++);
PyList_Append(parsed, (PyObject*)expr);
Py_DECREF(expr); //??
/* char *str = gf_showExpr(exp);
puts(str);
free(str); */
} while (*p);
}
return parsed;
}
static PGFModule*
readPGF(PyObject *self, PyObject *args)
{
char *path;
PGFModule *pgf;
if (!PyArg_ParseTuple(args, "s", &path))
return NULL;
pgf = (PGFModule*)PGFType.tp_new(&PGFType,NULL,NULL);
if (!pgf) return NULL;
pgf->obj = gf_readPGF(path);
return pgf;
}
//Todo: repr
static PyMethodDef pgf_methods[] = {
{"parse", (PyCFunction)parse, METH_VARARGS|METH_KEYWORDS,"Parse a string."},
{"startcat", (PyCFunction)startCategory, METH_NOARGS,"Get the start category."},
{NULL, NULL, 0, NULL} /* Sentinel */
};
/* Language methods, constructor and destructor */
REPRCB(lang_repr, Lang, gf_showLanguage)
DEALLOCFN(Lang_dealloc, Lang, gf_freeLanguage, "freeLanguage")
static Lang*
readLang(PyObject *self, PyObject *args)
{
char *langName;
Lang *l;
if (!PyArg_ParseTuple(args,"s",&langName))
return NULL;
l = (Lang*)LangType.tp_new(&LangType,NULL,NULL);
if(!l) return NULL;
l->obj = gf_readLanguage(langName);
return l;
}
/* gf types: methods, constructor and destructor */
DEALLOCFN(gfType_dealloc, gfType, gf_freeType, "freeType")
REPRCB(gfType_repr, gfType, gf_showType)
/* expression type: methods, destructor */
DEALLOCFN(expr_dealloc, Expr, gf_freeExpr, "freeExpr")
REPRCB(expr_repr, Expr, gf_showExpr)
/* tree typr: methods, constructor and destructor */
// Are Expr and Tree equivalent ?
REPRCB(tree_repr, Tree, gf_showExpr)
DEALLOCFN(Tree_dealloc, Tree, gf_freeTree, "freeTree")
/* gf module methods */
static PyMethodDef gf_methods[] = {
{"read_pgf", (PyCFunction)readPGF, METH_VARARGS,"Read pgf file."},
{"read_language", (PyCFunction)readLang, METH_VARARGS,"Get the language."},
{"startcat", (PyCFunction)startCategory, METH_VARARGS,"Get the start category of a pgf module."},
{NULL, NULL, 0, NULL} /* Sentinel */
};
#ifndef PyMODINIT_FUNC/* declarations for DLL import/export */
#define PyMODINIT_FUNC void
#endif
PyMODINIT_FUNC
initgf(void)
{
PyObject* m;
#define READYTYPE(t,trepr,tdealloc) t.tp_new = PyType_GenericNew; \
t.tp_repr = (reprfunc)trepr; \
t.tp_dealloc = (destructor)tdealloc; \
if (PyType_Ready(&t) < 0) return;
PGFType.tp_methods = pgf_methods;
READYTYPE(PGFType,NULL,PGF_dealloc)
READYTYPE(LangType, lang_repr, Lang_dealloc)
READYTYPE(gfTypeType, gfType_repr, gfType_dealloc)
READYTYPE(ExprType, expr_repr, expr_dealloc)
READYTYPE(TreeType, tree_repr, Tree_dealloc)
m = Py_InitModule3("gf", gf_methods,
"Grammatical Framework.");
static char *argv[] = {"gf.so", 0}, **argv_ = argv;
static int argc = 1;
gf_init (&argc, &argv_);
hs_add_root (__stginit_PGFFFI);
#define ADDTYPE(t) Py_INCREF(&t);\
PyModule_AddObject(m, "gf", (PyObject *)&t);
ADDTYPE(PGFType)
ADDTYPE(LangType)
ADDTYPE(gfTypeType)
ADDTYPE(TreeType)
ADDTYPE(ExprType)
}
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