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better error control

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This commit is contained in:
krangelov
2021-10-25 09:30:22 +02:00
parent d1c25ce1c1
commit 2acc4be306
1 changed files with 200 additions and 61 deletions
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261
src/runtime/python/ffi.c
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@@ -30,24 +30,25 @@ PgfExnType handleError(PgfExn err)
PgfText *
CString_AsPgfText(const char *s, size_t size) {
PgfText *txt = (PgfText *)PyMem_RawMalloc(sizeof(PgfText)+size+1);
memcpy(txt->text, s, size+1);
txt->size = size;
if (txt) {
memcpy(txt->text, s, size+1);
txt->size = size;
}
return txt;
}
PgfText *
PyUnicode_AsPgfText(PyObject *pystr)
{
if (!PyUnicode_Check(pystr)) {
PyErr_SetString(PyExc_TypeError, "input to PyUnicode_AsPgfText is not a string");
return NULL;
}
Py_ssize_t size;
const char *enc = PyUnicode_AsUTF8AndSize(pystr, &size);
if (!enc)
return NULL;
PgfText *ptext = PyMem_RawMalloc(sizeof(PgfText)+size+1);
memcpy(ptext->text, enc, size+1);
ptext->size = size;
if (ptext) {
memcpy(ptext->text, enc, size+1);
ptext->size = size;
}
return ptext;
}
@@ -67,6 +68,8 @@ PySequence_AsHypos(PyObject *pyseq, Py_ssize_t *n_hypos)
Py_ssize_t n = PySequence_Size(pyseq);
*n_hypos = n;
PgfTypeHypo *hypos = PyMem_RawMalloc(sizeof(PgfTypeHypo)*n);
if (!hypos)
return NULL;
for (Py_ssize_t i = 0; i < n; i++) {
PyObject *tup = PySequence_GetItem(pyseq, i);
@@ -91,6 +94,10 @@ PySequence_AsHypos(PyObject *pyseq, Py_ssize_t *n_hypos)
return NULL;
}
hypos[i].cid = PyUnicode_AsPgfText(t1);
if (!hypos[i].cid) {
FreeHypos(hypos, i);
return NULL;
}
PyObject *t2 = PyTuple_GET_ITEM(tup, 2);
if (!PyObject_TypeCheck(t2, &pgf_TypeType)) {
@@ -117,17 +124,24 @@ PyTuple_FromHypos(PgfTypeHypo *hypos, const size_t n_hypos)
for (size_t i = 0; i < n_hypos; i++) {
PyObject *tup = PyTuple_New(3);
if (!tup) {
Py_DECREF(pytuple);
return NULL;
}
PyTuple_SET_ITEM(pytuple, i, tup);
PyObject *cid = PyUnicode_FromStringAndSize(hypos[i].cid->text, hypos[i].cid->size);
if (!cid) {
Py_DECREF(pytuple);
return NULL;
}
PyObject *bt = hypos[i].bind_type == 0 ? Py_True : Py_False;
PyTuple_SET_ITEM(tup, 0, bt);
PyTuple_SET_ITEM(tup, 1, PyUnicode_FromStringAndSize(hypos[i].cid->text, hypos[i].cid->size));
PyTuple_SET_ITEM(tup, 1, cid);
PyTuple_SET_ITEM(tup, 2, (PyObject *)hypos[i].type);
Py_INCREF(bt);
Py_INCREF(hypos[i].type);
PyTuple_SET_ITEM(pytuple, i, tup);
}
if (PyErr_Occurred()) {
Py_DECREF(pytuple);
return NULL;
}
return pytuple;
@@ -141,17 +155,21 @@ PyList_AsPgfPrintContext(PyObject *pylist)
PyObject *item = PyList_GetItem(pylist, i-1);
if (!PyUnicode_Check(item)) {
PyErr_SetString(PyExc_TypeError, "variable argument in context must be a string");
return NULL;
goto fail;
}
if (PyUnicode_READY(item) != 0) {
return NULL;
goto fail;
}
Py_ssize_t size;
const char *enc = PyUnicode_AsUTF8AndSize(item, &size);
if (!enc)
goto fail;
PgfPrintContext *this = (PgfPrintContext *)PyMem_RawMalloc(sizeof(PgfPrintContext) + size + 1);
if (!this)
goto fail;
this->next = ctxt;
this->name.size = size;
memcpy(&this->name.text, enc, size+1);
@@ -159,6 +177,10 @@ PyList_AsPgfPrintContext(PyObject *pylist)
}
return ctxt;
fail:
FreePgfPrintContext(ctxt);
return NULL;
}
// ----------------------------------------------------------------------------
@@ -183,9 +205,11 @@ FreeHypos(PgfTypeHypo *hypos, Py_ssize_t n_hypos)
void
FreePgfPrintContext(PgfPrintContext *ctxt)
{
if (ctxt == NULL) return;
FreePgfPrintContext(ctxt->next);
PyMem_RawFree(ctxt);
while (ctxt) {
PgfPrintContext *tmp = ctxt->next;
PyMem_RawFree(ctxt);
ctxt = tmp;
}
}
// ----------------------------------------------------------------------------
@@ -195,11 +219,21 @@ static PgfExpr
eabs(PgfUnmarshaller *this, PgfBindType btype, PgfText *name, PgfExpr body)
{
ExprAbsObject *pyexpr = (ExprAbsObject *)pgf_ExprAbsType.tp_alloc(&pgf_ExprAbsType, 0);
if (!pyexpr)
return 0;
pyexpr->bind_type = btype == 0 ? Py_True : Py_False;
pyexpr->name = PyUnicode_FromPgfText(name);
pyexpr->body = (ExprObject *)body;
Py_INCREF(pyexpr->bind_type);
pyexpr->name = PyUnicode_FromPgfText(name);
if (!pyexpr->name) {
Py_DECREF(pyexpr);
return 0;
}
pyexpr->body = (ExprObject *)body;
Py_INCREF(body);
return (PgfExpr) pyexpr;
}
@@ -207,6 +241,8 @@ static PgfExpr
eapp(PgfUnmarshaller *this, PgfExpr fun, PgfExpr arg)
{
ExprAppObject *pyexpr = (ExprAppObject *)pgf_ExprAppType.tp_alloc(&pgf_ExprAppType, 0);
if (!pyexpr)
return 0;
pyexpr->fun = (ExprObject *)fun;
pyexpr->arg = (ExprObject *)arg;
Py_INCREF(fun);
@@ -218,6 +254,8 @@ static PgfExpr
elit(PgfUnmarshaller *this, PgfLiteral lit)
{
ExprLitObject *pyexpr = (ExprLitObject *)pgf_ExprLitType.tp_alloc(&pgf_ExprLitType, 0);
if (!pyexpr)
return 0;
PyObject *pyobj = (PyObject *)lit;
pyexpr->lit = pyobj;
Py_INCREF(pyobj);
@@ -228,7 +266,15 @@ static PgfExpr
emeta(PgfUnmarshaller *this, PgfMetaId meta)
{
ExprMetaObject *pyexpr = (ExprMetaObject *)pgf_ExprMetaType.tp_alloc(&pgf_ExprMetaType, 0);
if (!pyexpr)
return 0;
pyexpr->id = PyLong_FromLong(meta);
if (!pyexpr->id) {
Py_DECREF(pyexpr);
return 0;
}
return (PgfExpr) pyexpr;
}
@@ -236,7 +282,15 @@ static PgfExpr
efun(PgfUnmarshaller *this, PgfText *name)
{
ExprFunObject *pyexpr = (ExprFunObject *)pgf_ExprFunType.tp_alloc(&pgf_ExprFunType, 0);
if (!pyexpr)
return 0;
pyexpr->name = PyUnicode_FromPgfText(name);
if (!pyexpr->name) {
Py_DECREF(pyexpr);
return 0;
}
return (PgfExpr) pyexpr;
}
@@ -244,7 +298,15 @@ static PgfExpr
evar(PgfUnmarshaller *this, int index)
{
ExprVarObject *pyexpr = (ExprVarObject *)pgf_ExprVarType.tp_alloc(&pgf_ExprVarType, 0);
if (!pyexpr)
return 0;
pyexpr->var = PyLong_FromLong(index);
if (!pyexpr->var) {
Py_DECREF(pyexpr);
return 0;
}
return (PgfExpr) pyexpr;
}
@@ -252,10 +314,15 @@ static PgfExpr
etyped(PgfUnmarshaller *this, PgfExpr expr, PgfType typ)
{
ExprTypedObject *pyexpr = (ExprTypedObject *)pgf_ExprTypedType.tp_alloc(&pgf_ExprTypedType, 0);
if (!pyexpr)
return 0;
pyexpr->expr = (ExprObject *)expr;
pyexpr->type = (TypeObject *)typ;
Py_INCREF(expr);
pyexpr->type = (TypeObject *)typ;
Py_INCREF(typ);
return (PgfExpr) pyexpr;
}
@@ -263,8 +330,12 @@ static PgfExpr
eimplarg(PgfUnmarshaller *this, PgfExpr expr)
{
ExprImplArgObject *pyexpr = (ExprImplArgObject *)pgf_ExprImplArgType.tp_alloc(&pgf_ExprImplArgType, 0);
if (!pyexpr)
return 0;
pyexpr->expr = (ExprObject *)expr;
Py_INCREF(expr);
return (PgfExpr) pyexpr;
}
@@ -276,25 +347,47 @@ lint(PgfUnmarshaller *this, size_t size, uintmax_t *v)
} else {
intmax_t *v0 = (intmax_t *)v;
PyObject *i = PyLong_FromLong(*v0);
PyObject *intShifter = PyLong_FromUnsignedLong(LINT_BASE);
for (size_t n = 1; n < size; n++) {
PyObject *tmp = PyNumber_Multiply(i, intShifter);
Py_DECREF(i);
i = tmp;
PyObject *py_v = PyLong_FromUnsignedLong(v[n]);
if (*v0 >= 0) {
tmp = PyNumber_Add(i, py_v);
} else {
tmp = PyNumber_Subtract(i, py_v);
}
Py_DECREF(py_v);
Py_DECREF(i);
i = tmp;
}
Py_DECREF(intShifter);
if (PyErr_Occurred()) {
if (!i)
return 0;
if (size > 1) {
PyObject *intShifter = PyLong_FromUnsignedLong(LINT_BASE);
if (!intShifter) {
Py_DECREF(i);
return 0;
}
for (size_t n = 1; n < size; n++) {
PyObject *tmp = PyNumber_Multiply(i, intShifter);
Py_DECREF(i);
i = tmp;
if (!i) {
break;
}
PyObject *py_v = PyLong_FromUnsignedLong(v[n]);
if (!py_v) {
Py_DECREF(i);
i = NULL;
break;
}
if (*v0 >= 0) {
tmp = PyNumber_Add(i, py_v);
} else {
tmp = PyNumber_Subtract(i, py_v);
}
Py_DECREF(py_v);
Py_DECREF(i);
i = tmp;
if (!i) {
break;
}
}
Py_DECREF(intShifter);
}
return (PgfLiteral) i;
}
}
@@ -317,10 +410,27 @@ static PgfType
dtyp(PgfUnmarshaller *this, int n_hypos, PgfTypeHypo *hypos, PgfText *cat, int n_exprs, PgfExpr *exprs)
{
TypeObject *pytype = (TypeObject *)pgf_TypeType.tp_alloc(&pgf_TypeType, 0);
if (!pytype)
return 0;
pytype->hypos = PyTuple_FromHypos(hypos, n_hypos);
if (!pytype->hypos) {
Py_DECREF(pytype);
return 0;
}
pytype->name = PyUnicode_FromStringAndSize(cat->text, cat->size);
if (!pytype->name) {
Py_DECREF(pytype);
return 0;
}
pytype->exprs = PyTuple_New(n_exprs);
if (!pytype->exprs) {
Py_DECREF(pytype);
return 0;
}
for (int i = 0; i < n_exprs; i++) {
PyObject *expr = (PyObject *)exprs[i];
PyTuple_SET_ITEM(pytype->exprs, i, expr);
@@ -365,31 +475,66 @@ match_lit(PgfMarshaller *this, PgfUnmarshaller *u, PgfLiteral lit)
if (PyLong_Check(pyobj)) {
PyObject *intShifter = PyLong_FromUnsignedLong(LINT_BASE);
if (!intShifter)
return 0;
// determine size
size_t size = 1;
PyObject *x = PyNumber_Absolute(pyobj); // make a copy, ignore sign
if (!x) {
Py_DECREF(intShifter);
return 0;
}
while (PyObject_RichCompareBool(x, intShifter, Py_GE) == 1) {
size++;
PyObject *tmp = PyNumber_FloorDivide(x, intShifter);
Py_DECREF(x);
x = tmp;
if (!x) {
Py_DECREF(intShifter);
return 0;
}
}
Py_DECREF(x);
// chop up into chunks, always positive
PyObject *zero = PyLong_FromLong(0);
if (!zero) {
Py_DECREF(intShifter);
return 0;
}
bool isPos = PyObject_RichCompareBool(pyobj, zero, Py_GE) == 1;
Py_DECREF(zero);
x = PyNumber_Absolute(pyobj); // make a copy, ignore sign
uintmax_t *i = PyMem_RawMalloc(sizeof(uintmax_t)*size); // TODO when does this get freed?
if (!x) {
Py_DECREF(intShifter);
return 0;
}
uintmax_t *i = PyMem_RawMalloc(sizeof(uintmax_t)*size);
if (!i) {
Py_DECREF(x);
Py_DECREF(intShifter);
return 0;
}
for (int n = size-1; n > 0; n--) {
PyObject *rem = PyNumber_Remainder(x, intShifter);
if (!rem) {
PyMem_RawFree(i);
Py_DECREF(x);
Py_DECREF(intShifter);
return 0;
}
i[n] = PyLong_AsUnsignedLong(rem);
Py_DECREF(rem);
PyObject *tmp = PyNumber_FloorDivide(x, intShifter);
Py_DECREF(x);
x = tmp;
if (!x) {
PyMem_RawFree(i);
Py_DECREF(intShifter);
return 0;
}
}
Py_DECREF(intShifter);
@@ -402,10 +547,6 @@ match_lit(PgfMarshaller *this, PgfUnmarshaller *u, PgfLiteral lit)
Py_DECREF(x);
if (PyErr_Occurred()) {
return 0;
}
object res = u->vtbl->lint(u, size, i);
PyMem_RawFree(i);
@@ -416,6 +557,8 @@ match_lit(PgfMarshaller *this, PgfUnmarshaller *u, PgfLiteral lit)
return u->vtbl->lflt(u, d);
} else if (PyUnicode_Check(pyobj)) {
PgfText *t = PyUnicode_AsPgfText(pyobj);
if (!t)
return 0;
object res = u->vtbl->lstr(u, t);
FreePgfText(t);
return res;
@@ -434,38 +577,35 @@ match_expr(PgfMarshaller *this, PgfUnmarshaller *u, PgfExpr expr)
ExprAbsObject *eabs = (ExprAbsObject *)expr;
long bt = eabs->bind_type == Py_True ? 0 : 1;
PgfText *name = PyUnicode_AsPgfText(eabs->name);
if (!name)
return 0;
object res = u->vtbl->eabs(u, bt, name, (PgfExpr) eabs->body);
FreePgfText(name);
return res;
} else
if (PyObject_TypeCheck(pyobj, &pgf_ExprAppType)) {
} else if (PyObject_TypeCheck(pyobj, &pgf_ExprAppType)) {
ExprAppObject *eapp = (ExprAppObject *)expr;
return u->vtbl->eapp(u, (PgfExpr) eapp->fun, (PgfExpr) eapp->arg);
} else
if (PyObject_TypeCheck(pyobj, &pgf_ExprLitType)) {
} else if (PyObject_TypeCheck(pyobj, &pgf_ExprLitType)) {
ExprLitObject *elit = (ExprLitObject *)expr;
return this->vtbl->match_lit(this, u, (PgfLiteral) elit->lit);
} else
if (PyObject_TypeCheck(pyobj, &pgf_ExprMetaType)) {
} else if (PyObject_TypeCheck(pyobj, &pgf_ExprMetaType)) {
ExprMetaObject *emeta = (ExprMetaObject *)expr;
return u->vtbl->emeta(u, (PgfMetaId) PyLong_AsLong(emeta->id));
} else
if (PyObject_TypeCheck(pyobj, &pgf_ExprFunType)) {
} else if (PyObject_TypeCheck(pyobj, &pgf_ExprFunType)) {
ExprFunObject *efun = (ExprFunObject *)expr;
PgfText *name = PyUnicode_AsPgfText(efun->name);
if (!name)
return 0;
object res = u->vtbl->efun(u, name);
FreePgfText(name);
return res;
} else
if (PyObject_TypeCheck(pyobj, &pgf_ExprVarType)) {
} else if (PyObject_TypeCheck(pyobj, &pgf_ExprVarType)) {
ExprVarObject *evar = (ExprVarObject *)expr;
return u->vtbl->evar(u, PyLong_AsLong(evar->var));
} else
if (PyObject_TypeCheck(pyobj, &pgf_ExprTypedType)) {
} else if (PyObject_TypeCheck(pyobj, &pgf_ExprTypedType)) {
ExprTypedObject *etyped = (ExprTypedObject *)expr;
return u->vtbl->etyped(u, (PgfExpr) etyped->expr, (PgfType) etyped->type);
} else
if (PyObject_TypeCheck(pyobj, &pgf_ExprImplArgType)) {
} else if (PyObject_TypeCheck(pyobj, &pgf_ExprImplArgType)) {
ExprImplArgObject *eimplarg = (ExprImplArgObject *)expr;
return u->vtbl->eimplarg(u, (PgfExpr) eimplarg->expr);
} else {
@@ -493,8 +633,7 @@ match_type(PgfMarshaller *this, PgfUnmarshaller *u, PgfType ty)
Py_ssize_t n_exprs = PySequence_Size(type->exprs);
PgfExpr exprs[n_exprs];
for (Py_ssize_t i = 0; i < n_exprs; i++) {
exprs[i] = (PgfExpr)PySequence_GetItem(type->exprs, i);
Py_INCREF(exprs[i]);
exprs[i] = (PgfExpr)PySequence_ITEM(type->exprs, i);
}
object res = u->vtbl->dtyp(u, n_hypos, hypos, cat, n_exprs, exprs);