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-rw-r--r--Modules/_struct.c117
1 files changed, 52 insertions, 65 deletions
diff --git a/Modules/_struct.c b/Modules/_struct.c
index 78cd0f3401..f66ee18bc4 100644
--- a/Modules/_struct.c
+++ b/Modules/_struct.c
@@ -85,6 +85,19 @@ typedef struct { char c; long long x; } s_long_long;
#pragma options align=reset
#endif
+/*[python input]
+class cache_struct_converter(CConverter):
+ type = 'PyStructObject *'
+ converter = 'cache_struct_converter'
+ c_default = "NULL"
+
+ def cleanup(self):
+ return "Py_XDECREF(%s);\n" % self.name
+[python start generated code]*/
+/*[python end generated code: output=da39a3ee5e6b4b0d input=49957cca130ffb63]*/
+
+static int cache_struct_converter(PyObject *, PyObject **);
+
#include "clinic/_struct.c.h"
/* Helper for integer format codes: converts an arbitrary Python object to a
@@ -2037,21 +2050,27 @@ PyTypeObject PyStructType = {
#define MAXCACHE 100
static PyObject *cache = NULL;
-static PyStructObject *
-cache_struct(PyObject *fmt)
+static int
+cache_struct_converter(PyObject *fmt, PyObject **ptr)
{
PyObject * s_object;
+ if (fmt == NULL) {
+ Py_DECREF(*ptr);
+ return 1;
+ }
+
if (cache == NULL) {
cache = PyDict_New();
if (cache == NULL)
- return NULL;
+ return 0;
}
s_object = PyDict_GetItem(cache, fmt);
if (s_object != NULL) {
Py_INCREF(s_object);
- return (PyStructObject *)s_object;
+ *ptr = s_object;
+ return Py_CLEANUP_SUPPORTED;
}
s_object = PyObject_CallFunctionObjArgs((PyObject *)(&PyStructType), fmt, NULL);
@@ -2061,8 +2080,10 @@ cache_struct(PyObject *fmt)
/* Attempt to cache the result */
if (PyDict_SetItem(cache, fmt, s_object) == -1)
PyErr_Clear();
+ *ptr = s_object;
+ return Py_CLEANUP_SUPPORTED;
}
- return (PyStructObject *)s_object;
+ return 0;
}
/*[clinic input]
@@ -2081,25 +2102,19 @@ _clearcache_impl(PyObject *module)
/*[clinic input]
-calcsize
+calcsize -> Py_ssize_t
- format: object
+ format as s_object: cache_struct
/
Return size in bytes of the struct described by the format string.
[clinic start generated code]*/
-static PyObject *
-calcsize(PyObject *module, PyObject *format)
-/*[clinic end generated code: output=90fbcf191fe9470a input=55488303a06777fa]*/
+static Py_ssize_t
+calcsize_impl(PyObject *module, PyStructObject *s_object)
+/*[clinic end generated code: output=db7d23d09c6932c4 input=96a6a590c7717ecd]*/
{
- Py_ssize_t n;
- PyStructObject *s_object = cache_struct(format);
- if (s_object == NULL)
- return NULL;
- n = s_object->s_size;
- Py_DECREF(s_object);
- return PyLong_FromSsize_t(n);
+ return s_object->s_size;
}
PyDoc_STRVAR(pack_doc,
@@ -2111,7 +2126,7 @@ to the format string. See help(struct) for more on format strings.");
static PyObject *
pack(PyObject *self, PyObject **args, Py_ssize_t nargs, PyObject *kwnames)
{
- PyStructObject *s_object;
+ PyObject *s_object = NULL;
PyObject *format, *result;
if (nargs == 0) {
@@ -2120,11 +2135,10 @@ pack(PyObject *self, PyObject **args, Py_ssize_t nargs, PyObject *kwnames)
}
format = args[0];
- s_object = cache_struct(format);
- if (s_object == NULL) {
+ if (!cache_struct_converter(format, &s_object)) {
return NULL;
}
- result = s_pack((PyObject *)s_object, args + 1, nargs - 1, kwnames);
+ result = s_pack(s_object, args + 1, nargs - 1, kwnames);
Py_DECREF(s_object);
return result;
}
@@ -2140,7 +2154,7 @@ on format strings.");
static PyObject *
pack_into(PyObject *self, PyObject **args, Py_ssize_t nargs, PyObject *kwnames)
{
- PyStructObject *s_object;
+ PyObject *s_object = NULL;
PyObject *format, *result;
if (nargs == 0) {
@@ -2149,11 +2163,10 @@ pack_into(PyObject *self, PyObject **args, Py_ssize_t nargs, PyObject *kwnames)
}
format = args[0];
- s_object = cache_struct(format);
- if (s_object == NULL) {
+ if (!cache_struct_converter(format, &s_object)) {
return NULL;
}
- result = s_pack_into((PyObject *)s_object, args + 1, nargs - 1, kwnames);
+ result = s_pack_into(s_object, args + 1, nargs - 1, kwnames);
Py_DECREF(s_object);
return result;
}
@@ -2161,7 +2174,7 @@ pack_into(PyObject *self, PyObject **args, Py_ssize_t nargs, PyObject *kwnames)
/*[clinic input]
unpack
- format: object
+ format as s_object: cache_struct
buffer: Py_buffer
/
@@ -2173,24 +2186,16 @@ See help(struct) for more on format strings.
[clinic start generated code]*/
static PyObject *
-unpack_impl(PyObject *module, PyObject *format, Py_buffer *buffer)
-/*[clinic end generated code: output=f75ada02aaa33b3b input=654078e6660c2df0]*/
+unpack_impl(PyObject *module, PyStructObject *s_object, Py_buffer *buffer)
+/*[clinic end generated code: output=48ddd4d88eca8551 input=05fa3b91678da727]*/
{
- PyStructObject *s_object;
- PyObject *result;
-
- s_object = cache_struct(format);
- if (s_object == NULL)
- return NULL;
- result = Struct_unpack_impl(s_object, buffer);
- Py_DECREF(s_object);
- return result;
+ return Struct_unpack_impl(s_object, buffer);
}
/*[clinic input]
unpack_from
- format: object
+ format as s_object: cache_struct
/
buffer: Py_buffer
offset: Py_ssize_t = 0
@@ -2203,27 +2208,17 @@ See help(struct) for more on format strings.
[clinic start generated code]*/
static PyObject *
-unpack_from_impl(PyObject *module, PyObject *format, Py_buffer *buffer,
- Py_ssize_t offset)
-/*[clinic end generated code: output=2492f0c3a0b82577 input=9ead76c6ac7164f7]*/
+unpack_from_impl(PyObject *module, PyStructObject *s_object,
+ Py_buffer *buffer, Py_ssize_t offset)
+/*[clinic end generated code: output=1042631674c6e0d3 input=6e80a5398e985025]*/
{
- PyStructObject *s_object;
- PyObject *result;
-
- s_object = cache_struct(format);
- if (s_object == NULL) {
- return NULL;
- }
- result = Struct_unpack_from_impl(s_object, buffer, offset);
-
- Py_DECREF(s_object);
- return result;
+ return Struct_unpack_from_impl(s_object, buffer, offset);
}
/*[clinic input]
iter_unpack
- format: object
+ format as s_object: cache_struct
buffer: object
/
@@ -2236,19 +2231,11 @@ Requires that the bytes length be a multiple of the format struct size.
[clinic start generated code]*/
static PyObject *
-iter_unpack_impl(PyObject *module, PyObject *format, PyObject *buffer)
-/*[clinic end generated code: output=b1291e97a6d4cf3c input=8674dfd2f0dae416]*/
+iter_unpack_impl(PyObject *module, PyStructObject *s_object,
+ PyObject *buffer)
+/*[clinic end generated code: output=0ae50e250d20e74d input=b214a58869a3c98d]*/
{
- PyStructObject *s_object;
- PyObject *result;
-
- s_object = cache_struct(format);
- if (s_object == NULL)
- return NULL;
-
- result = Struct_iter_unpack(s_object, buffer);
- Py_DECREF(s_object);
- return result;
+ return Struct_iter_unpack(s_object, buffer);
}
static struct PyMethodDef module_functions[] = {
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