mirror of
https://github.com/GrammaticalFramework/gf-core.git
synced 2026-04-10 05:29:30 -06:00
340 lines
8.4 KiB
C
340 lines
8.4 KiB
C
// GF Python bindings
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// Jordi Saludes, upc.edu 2010, 2011
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//
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#include <Python.h>
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#include <sys/stat.h>
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#include "pygf.h"
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/* utilities */
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int
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checkType(void* obj, PyTypeObject* tp)
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{
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int isRight = PyObject_TypeCheck((PyObject*)obj, tp);
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if (!isRight)
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PyErr_Format(PyExc_TypeError, "Expecting a %s.", tp->tp_doc);
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return isRight;
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}
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/* new types and declarations */
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NEWGF(CId,GF_CId,CIdType,"gf.cid","identifier")
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NEWGF(Lang,GF_Language,LangType,"gf.lang","language")
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NEWGF(gfType,GF_Type,gfTypeType,"gf.type","gf type")
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NEWGF(PGF,GF_PGF,PGFType,"gf.pgf","PGF module")
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NEWGF(Expr,GF_Expr,ExprType,"gf.expr","gf expression")
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NEWGF(Tree,GF_Tree,TreeType,"gf.tree","gf tree")
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/* CId methods, constructor and destructor */
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DEALLOCFN(CId_dealloc, CId, gf_freeCId, "freeCId")
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/* PGF methods, constructor and destructor */
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DEALLOCFN(PGF_dealloc, PGF, gf_freePGF, "freePGF")
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static PyObject*
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pgf_repr(PGF *self) {
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Lang* lang = gf_abstractName(self);
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char* abs = gf_showLanguage(lang);
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Py_DECREF(lang);
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PyObject* str = PyString_FromFormat("<gf.pgf with abstract %s>", abs);
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free(abs);
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return str;
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}
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static PyObject*
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languageCode(PGF *self, PyObject *args)
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{
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Lang *lang;
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if (!PyArg_ParseTuple(args, "O", &lang))
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return NULL;
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if (!checkType(lang, &LangType)) return NULL;
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char* scode = gf_languageCode(self, lang);
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if (scode) {
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PyObject* result = PyString_FromString(scode);
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free(scode);
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return result;
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} else {
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Py_INCREF(Py_None);
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return Py_None;
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}
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}
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static PyObject*
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linearize(PGF *self, PyObject *args)
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{
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Lang *lang;
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Tree *tree;
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if (!PyArg_ParseTuple(args, "OO", &lang, &tree))
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return NULL;
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if (!checkType(lang,&LangType)) return NULL;
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if (!checkType(tree,&TreeType)) return NULL;
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char* c_lin = gf_linearize(self, lang, tree);
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PyObject* lin = PyString_FromString(c_lin);
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free(c_lin);
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return lin;
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}
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static Lang*
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abstractName(PGF *self)
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{
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if (!checkType(self,&PGFType)) return NULL;
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return gf_abstractName(self);
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}
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static PyObject*
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printName(PGF *self, PyObject *args)
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{
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Lang* lang;
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CId* id;
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if (!PyArg_ParseTuple(args, "OO", &lang, &id))
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return NULL;
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if (!checkType(lang,&LangType)) return NULL;
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if (!checkType(id,&CIdType)) return NULL;
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char *pname = gf_showPrintName(self, lang, id);
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PyObject* result = PyString_FromString(pname);
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free(pname);
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return result;
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}
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static gfType*
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functiontype(PGF *self, PyObject* args)
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{
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CId* cid;
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gfType* gftp;
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if (!PyArg_ParseTuple(args, "O", &cid))
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return NULL;
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if (!checkType(cid,&CIdType)) {
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PyErr_Format(PyExc_TypeError, "Must be a gf identifier.");
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return NULL;
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}
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return gf_functiontype(self, cid);
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}
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static PyObject*
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parse(PGF *self, PyObject *args, PyObject *kws)
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{
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Lang *lang;
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gfType *cat = NULL;
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char *lexed;
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static char *kwlist[] = {"lang", "lexed", "cat", NULL};
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if (!PyArg_ParseTupleAndKeywords(args, kws, "Os|O", kwlist, &lang, &lexed, &cat))
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return NULL;
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if (!checkType(self, &PGFType)) return NULL;
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if (!checkType(lang, &LangType)) return NULL;
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if (cat) {
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if (!checkType(cat, &gfTypeType)) return NULL;
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} else {
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cat = gf_startCat(self);
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}
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return gf_parse(self, lang, cat, lexed);
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}
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static PGF*
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readPGF(PyObject *self, PyObject *args)
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{
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char *path;
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struct stat info;
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if (!PyArg_ParseTuple(args, "s", &path))
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return NULL;
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if (stat(path, &info) == 0) {
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PGF* pgf = gf_readPGF(path);
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return pgf;
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} else {
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PyErr_Format(PyExc_IOError, "No such file: %s", path);
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return NULL;
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}
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}
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static PyObject*
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completions(PGF *self, PyObject *args, PyObject *kws)
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{ char *tokens;
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Lang *lang;
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gfType *cat = NULL;
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static char *kwlist[] = {"lang", "tokens", "category", NULL};
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if (!PyArg_ParseTupleAndKeywords(args, kws, "Os|O", kwlist, &lang, &tokens, &cat))
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return NULL;
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if (!checkType(self, &PGFType)) return NULL;
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if (!checkType(lang, &LangType)) return NULL;
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if (cat) {
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if (!checkType(cat, &gfTypeType)) return NULL;
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} else {
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cat = gf_startCat(self);
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}
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return gf_completions(self, lang, cat, tokens);
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}
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static PyMethodDef pgf_methods[] = {
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{"parse", (PyCFunction)parse, METH_VARARGS|METH_KEYWORDS, "Parse a string."},
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{"linearize", (PyCFunction)linearize, METH_VARARGS,"Linearize tree."},
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{"lang_code", (PyCFunction)languageCode, METH_VARARGS,"Get the language code."},
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{"print_name", (PyCFunction)printName, METH_VARARGS,"Get the print name for a id."},
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{"fun_type", (PyCFunction)functiontype, METH_VARARGS,"Get the type of a fun expression."},
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{"startcat", (PyCFunction)gf_startCat, METH_NOARGS,"Get the start category."},
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{"categories", (PyCFunction)gf_categories, METH_NOARGS,"Get all categories."},
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{"functions", (PyCFunction)gf_functions, METH_NOARGS,"Get all functions."},
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{"abstract", (PyCFunction)abstractName, METH_NOARGS,"Get the module abstract name."},
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{"languages", (PyCFunction)gf_languages, METH_NOARGS,"Get the module languages."},
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{"complete", (PyCFunction)completions, METH_VARARGS|METH_KEYWORDS, "Get completions for tokens."},
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{NULL, NULL, 0, NULL} /* Sentinel */
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};
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REPRCB(CId_repr, CId, gf_showCId)
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/* Language methods, constructor and destructor */
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REPRCB(lang_repr, Lang, gf_showLanguage)
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DEALLOCFN(Lang_dealloc, Lang, gf_freeLanguage, "freeLanguage")
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static Lang*
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readLang(PyObject *self, PyObject *args)
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{
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char *langName;
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Lang *l;
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if (!PyArg_ParseTuple(args,"s",&langName))
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return NULL;
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l = (Lang*)LangType.tp_new(&LangType,NULL,NULL);
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if(!l) return NULL;
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gf_readLanguage(l,langName);
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return l;
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}
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/* gf types: methods, constructor and destructor */
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DEALLOCFN(gfType_dealloc, gfType, gf_freeType, "freeType")
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REPRCB(gfType_repr, gfType, gf_showType)
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/* expression type: methods, destructor */
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DEALLOCFN(expr_dealloc, Expr, gf_freeExpr, "freeExpr")
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REPRCB(expr_repr, Expr, gf_showExpr)
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static PyObject*
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unapp(Expr *self) {
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PyObject* obj = gf_unapp(self);
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if (!obj) {
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char* s = gf_unstr(self);
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if (s) {
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obj = PyString_FromString(s);
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free(s);
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} else {
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long n = gf_unint(self);
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if (n != -9) {
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obj = PyInt_FromLong(n);
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} else {
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PyErr_Format(PyExc_TypeError, "Cannot unapply expr.");
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}
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}
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}
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return obj;
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}
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static PyObject*
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infer_expr(Expr *self, PyObject* args) {
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PGF* pgf;
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if (!PyArg_ParseTuple(args, "O", &pgf))
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return NULL;
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if (!checkType(pgf, &PGFType)) {
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PyErr_Format(PyExc_ValueError, "Must be a pgf module.");
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return NULL;
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}
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return gf_inferexpr(pgf, self);
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}
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/* todo: Is Tree == Expr ? */
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static PyMethodDef expr_methods[] = {
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{"unapply", (PyCFunction)unapp, METH_NOARGS, "Unapply an expression."},
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{"infer", (PyCFunction)infer_expr, METH_VARARGS, "Infer the type of an expression."},
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{NULL, NULL, 0, NULL} /* Sentinel */
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};
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/* tree type: methods, constructor and destructor */
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// Are Expr and Tree equivalent ?
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REPRCB(tree_repr, Tree, gf_showExpr)
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DEALLOCFN(Tree_dealloc, Tree, gf_freeTree, "freeTree")
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/* gf module methods */
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static PyMethodDef gf_methods[] = {
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{"read_pgf", (PyCFunction)readPGF, METH_VARARGS,"Read pgf file."},
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{"read_language", (PyCFunction)readLang, METH_VARARGS,"Get the language."},
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{NULL, NULL, 0, NULL} /* Sentinel */
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};
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#ifndef PyMODINIT_FUNC/* declarations for DLL import/export */
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#define PyMODINIT_FUNC void
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#endif
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PyMODINIT_FUNC
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initgf(void)
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{
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PyObject* m;
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#define READYTYPE(t,trepr,tdealloc) t.tp_new = PyType_GenericNew; \
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t.tp_repr = (reprfunc)trepr; \
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t.tp_dealloc = (destructor)tdealloc; \
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if (PyType_Ready(&t) < 0) return;
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READYTYPE(CIdType, CId_repr, CId_dealloc)
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PGFType.tp_methods = pgf_methods;
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READYTYPE(PGFType, pgf_repr, PGF_dealloc)
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READYTYPE(LangType, lang_repr, Lang_dealloc)
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READYTYPE(gfTypeType, gfType_repr, gfType_dealloc)
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ExprType.tp_methods = expr_methods;
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READYTYPE(ExprType, expr_repr, expr_dealloc)
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TreeType.tp_methods = expr_methods; // Tree == Expr ?
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READYTYPE(TreeType, tree_repr, Tree_dealloc)
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m = Py_InitModule3("gf", gf_methods,
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"Grammatical Framework.");
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static char *argv[] = {"gf.so", 0}, **argv_ = argv;
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static int argc = 1;
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gf_init (&argc, &argv_);
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hs_add_root (__stginit_PyGF);
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#define ADDTYPE(t) Py_INCREF(&t);\
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PyModule_AddObject(m, "gf", (PyObject *)&t);
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ADDTYPE(PGFType)
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ADDTYPE(LangType)
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ADDTYPE(gfTypeType)
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ADDTYPE(TreeType)
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ADDTYPE(ExprType)
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}
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/* List utilities to be imported by FFI */
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inline PyObject* newList() { return PyList_New(0); }
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inline PyObject* newString(const char *s) { return PyString_FromString(s); }
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inline void append(PyObject* l, PyObject* ob) { PyList_Append(l, ob); }
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