Merged revisions 59680-59695 via svnmerge from
svn+ssh://pythondev@svn.python.org/python/trunk
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r59686 | guido.van.rossum | 2008-01-04 00:54:04 +0100 (Fri, 04 Jan 2008) | 2 lines
Bug #1301: fixed a bad assert in _tkinter.
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r59687 | raymond.hettinger | 2008-01-04 01:01:15 +0100 (Fri, 04 Jan 2008) | 3 lines
Finish-up the struct module optimizations started at the Iceland NFS sprint.
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r59688 | christian.heimes | 2008-01-04 01:04:52 +0100 (Fri, 04 Jan 2008) | 1 line
Fixed #1687: plistlib.py restricts <integer> to Python int when writing
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r59689 | christian.heimes | 2008-01-04 01:37:34 +0100 (Fri, 04 Jan 2008) | 1 line
Bug #1481296: Fixed long(float('nan'))!=0L.
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r59691 | andrew.kuchling | 2008-01-04 02:15:50 +0100 (Fri, 04 Jan 2008) | 1 line
Markup fixes; grammar tweaks
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r59692 | andrew.kuchling | 2008-01-04 02:16:12 +0100 (Fri, 04 Jan 2008) | 1 line
Add items
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r59694 | christian.heimes | 2008-01-04 02:48:50 +0100 (Fri, 04 Jan 2008) | 1 line
Fixed math.copysign() on Windows
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r59695 | christian.heimes | 2008-01-04 03:03:25 +0100 (Fri, 04 Jan 2008) | 1 line
Filled in some XXX comments
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diff --git a/Modules/_struct.c b/Modules/_struct.c
index 3c02bc9..278b035 100644
--- a/Modules/_struct.c
+++ b/Modules/_struct.c
@@ -1464,11 +1464,28 @@
assert(PyStruct_Check(self));
- if (!PyArg_ParseTupleAndKeywords(args, kwds, "S:Struct", kwlist,
+ if (!PyArg_ParseTupleAndKeywords(args, kwds, "O:Struct", kwlist,
&o_format))
return -1;
- Py_INCREF(o_format);
+ if (PyUnicode_Check(o_format)) {
+ o_format = PyUnicode_AsASCIIString(o_format);
+ if (o_format == NULL)
+ return -1;
+ }
+ /* XXX support buffer interface, too */
+ else {
+ Py_INCREF(o_format);
+ }
+
+ if (!PyString_Check(o_format)) {
+ Py_DECREF(o_format);
+ PyErr_Format(PyExc_TypeError,
+ "Struct() argument 1 must be bytes, not %.200s",
+ Py_TYPE(o_format)->tp_name);
+ return -1;
+ }
+
Py_XDECREF(soself->s_format);
soself->s_format = o_format;
@@ -1861,12 +1878,226 @@
PyObject_Del, /* tp_free */
};
+
+/* ---- Standalone functions ---- */
+
+#define MAXCACHE 100
+static PyObject *cache = NULL;
+
+static PyObject *
+cache_struct(PyObject *fmt)
+{
+ PyObject * s_object;
+
+ if (cache == NULL) {
+ cache = PyDict_New();
+ if (cache == NULL)
+ return NULL;
+ }
+
+ s_object = PyDict_GetItem(cache, fmt);
+ if (s_object != NULL) {
+ Py_INCREF(s_object);
+ return s_object;
+ }
+
+ s_object = PyObject_CallFunctionObjArgs((PyObject *)(&PyStructType), fmt, NULL);
+ if (s_object != NULL) {
+ if (PyDict_Size(cache) >= MAXCACHE)
+ PyDict_Clear(cache);
+ /* Attempt to cache the result */
+ if (PyDict_SetItem(cache, fmt, s_object) == -1)
+ PyErr_Clear();
+ }
+ return s_object;
+}
+
+PyDoc_STRVAR(clearcache_doc,
+"Clear the internal cache.");
+
+static PyObject *
+clearcache(PyObject *self)
+{
+ if (cache != NULL)
+ PyDict_Clear(cache);
+ Py_RETURN_NONE;
+}
+
+PyDoc_STRVAR(calcsize_doc,
+"Return size of C struct described by format string fmt.");
+
+static PyObject *
+calcsize(PyObject *self, PyObject *fmt)
+{
+ Py_ssize_t n;
+ PyObject *s_object = cache_struct(fmt);
+ if (s_object == NULL)
+ return NULL;
+ n = ((PyStructObject *)s_object)->s_size;
+ Py_DECREF(s_object);
+ return PyLong_FromSsize_t(n);
+}
+
+PyDoc_STRVAR(pack_doc,
+"Return string containing values v1, v2, ... packed according to fmt.");
+
+static PyObject *
+pack(PyObject *self, PyObject *args)
+{
+ PyObject *s_object, *fmt, *newargs, *result;
+ Py_ssize_t n = PyTuple_GET_SIZE(args);
+
+ if (n == 0) {
+ PyErr_SetString(PyExc_TypeError, "missing format argument");
+ return NULL;
+ }
+ fmt = PyTuple_GET_ITEM(args, 0);
+ newargs = PyTuple_GetSlice(args, 1, n);
+ if (newargs == NULL)
+ return NULL;
+
+ s_object = cache_struct(fmt);
+ if (s_object == NULL) {
+ Py_DECREF(newargs);
+ return NULL;
+ }
+ result = s_pack(s_object, newargs);
+ Py_DECREF(newargs);
+ Py_DECREF(s_object);
+ return result;
+}
+
+PyDoc_STRVAR(pack_into_doc,
+"Pack the values v1, v2, ... according to fmt.\n\
+Write the packed bytes into the writable buffer buf starting at offset.");
+
+static PyObject *
+pack_into(PyObject *self, PyObject *args)
+{
+ PyObject *s_object, *fmt, *newargs, *result;
+ Py_ssize_t n = PyTuple_GET_SIZE(args);
+
+ if (n == 0) {
+ PyErr_SetString(PyExc_TypeError, "missing format argument");
+ return NULL;
+ }
+ fmt = PyTuple_GET_ITEM(args, 0);
+ newargs = PyTuple_GetSlice(args, 1, n);
+ if (newargs == NULL)
+ return NULL;
+
+ s_object = cache_struct(fmt);
+ if (s_object == NULL) {
+ Py_DECREF(newargs);
+ return NULL;
+ }
+ result = s_pack_into(s_object, newargs);
+ Py_DECREF(newargs);
+ Py_DECREF(s_object);
+ return result;
+}
+
+PyDoc_STRVAR(unpack_doc,
+"Unpack the string containing packed C structure data, according to fmt.\n\
+Requires len(string) == calcsize(fmt).");
+
+static PyObject *
+unpack(PyObject *self, PyObject *args)
+{
+ PyObject *s_object, *fmt, *inputstr, *result;
+
+ if (!PyArg_UnpackTuple(args, "unpack", 2, 2, &fmt, &inputstr))
+ return NULL;
+
+ s_object = cache_struct(fmt);
+ if (s_object == NULL)
+ return NULL;
+ result = s_unpack(s_object, inputstr);
+ Py_DECREF(s_object);
+ return result;
+}
+
+PyDoc_STRVAR(unpack_from_doc,
+"Unpack the buffer, containing packed C structure data, according to\n\
+fmt, starting at offset. Requires len(buffer[offset:]) >= calcsize(fmt).");
+
+static PyObject *
+unpack_from(PyObject *self, PyObject *args, PyObject *kwds)
+{
+ PyObject *s_object, *fmt, *newargs, *result;
+ Py_ssize_t n = PyTuple_GET_SIZE(args);
+
+ if (n == 0) {
+ PyErr_SetString(PyExc_TypeError, "missing format argument");
+ return NULL;
+ }
+ fmt = PyTuple_GET_ITEM(args, 0);
+ newargs = PyTuple_GetSlice(args, 1, n);
+ if (newargs == NULL)
+ return NULL;
+
+ s_object = cache_struct(fmt);
+ if (s_object == NULL) {
+ Py_DECREF(newargs);
+ return NULL;
+ }
+ result = s_unpack_from(s_object, newargs, kwds);
+ Py_DECREF(newargs);
+ Py_DECREF(s_object);
+ return result;
+}
+
+static struct PyMethodDef module_functions[] = {
+ {"_clearcache", (PyCFunction)clearcache, METH_NOARGS, clearcache_doc},
+ {"calcsize", calcsize, METH_O, calcsize_doc},
+ {"pack", pack, METH_VARARGS, pack_doc},
+ {"pack_into", pack_into, METH_VARARGS, pack_into_doc},
+ {"unpack", unpack, METH_VARARGS, unpack_doc},
+ {"unpack_from", (PyCFunction)unpack_from,
+ METH_VARARGS|METH_KEYWORDS, unpack_from_doc},
+ {NULL, NULL} /* sentinel */
+};
+
+
/* Module initialization */
+PyDoc_STRVAR(module_doc,
+"Functions to convert between Python values and C structs.\n\
+Python strings are used to hold the data representing the C struct\n\
+and also as format strings to describe the layout of data in the C struct.\n\
+\n\
+The optional first format char indicates byte order, size and alignment:\n\
+ @: native order, size & alignment (default)\n\
+ =: native order, std. size & alignment\n\
+ <: little-endian, std. size & alignment\n\
+ >: big-endian, std. size & alignment\n\
+ !: same as >\n\
+\n\
+The remaining chars indicate types of args and must match exactly;\n\
+these can be preceded by a decimal repeat count:\n\
+ x: pad byte (no data); c:char; b:signed byte; B:unsigned byte;\n\
+ h:short; H:unsigned short; i:int; I:unsigned int;\n\
+ l:long; L:unsigned long; f:float; d:double.\n\
+Special cases (preceding decimal count indicates length):\n\
+ s:string (array of char); p: pascal string (with count byte).\n\
+Special case (only available in native format):\n\
+ P:an integer type that is wide enough to hold a pointer.\n\
+Special case (not in native mode unless 'long long' in platform C):\n\
+ q:long long; Q:unsigned long long\n\
+Whitespace between formats is ignored.\n\
+\n\
+The variable struct.error is an exception raised on errors.\n");
+
PyMODINIT_FUNC
init_struct(void)
{
- PyObject *m = Py_InitModule("_struct", NULL);
+ PyObject *ver, *m;
+
+ ver = PyString_FromString("0.2");
+ if (ver == NULL)
+ return;
+
+ m = Py_InitModule3("_struct", module_functions, module_doc);
if (m == NULL)
return;
@@ -1947,6 +2178,8 @@
Py_INCREF((PyObject*)&PyStructType);
PyModule_AddObject(m, "Struct", (PyObject*)&PyStructType);
+ PyModule_AddObject(m, "__version__", ver);
+
PyModule_AddIntConstant(m, "_PY_STRUCT_RANGE_CHECKING", 1);
#ifdef PY_STRUCT_OVERFLOW_MASKING
PyModule_AddIntConstant(m, "_PY_STRUCT_OVERFLOW_MASKING", 1);