Merged revisions 76806,76808 via svnmerge from

svn+ssh://pythondev@svn.python.org/python/branches/py3k

................
  r76806 | benjamin.peterson | 2009-12-13 13:25:34 -0600 (Sun, 13 Dec 2009) | 14 lines

  Merged revisions 76805 via svnmerge from
  svn+ssh://pythondev@svn.python.org/python/trunk

  ........
    r76805 | benjamin.peterson | 2009-12-13 13:19:07 -0600 (Sun, 13 Dec 2009) | 7 lines

    accept None as the same as having passed no argument in file types #7349

    This is for consistency with imitation file objects like StringIO and BytesIO.

    This commit also adds a few tests, where they were lacking for concerned
    methods.
  ........
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  r76808 | benjamin.peterson | 2009-12-13 13:28:09 -0600 (Sun, 13 Dec 2009) | 9 lines

  Merged revisions 76807 via svnmerge from
  svn+ssh://pythondev@svn.python.org/python/trunk

  ........
    r76807 | benjamin.peterson | 2009-12-13 13:27:02 -0600 (Sun, 13 Dec 2009) | 1 line

    remove unused variable
  ........
................

Modules/_io/_iomodule.c

@@ -561,6 +561,30 @@ PyNumber_AsOff_t(PyObject *item, PyObject *err)
     return result;
 }
 
+
+/* Basically the "n" format code with the ability to turn None into -1. */
+int 
+_PyIO_ConvertSsize_t(PyObject *obj, void *result) {
+    Py_ssize_t limit;
+    if (obj == Py_None) {
+        limit = -1;
+    }
+    else if (PyNumber_Check(obj)) {
+        limit = PyNumber_AsSsize_t(obj, PyExc_OverflowError);
+        if (limit == -1 && PyErr_Occurred())
+            return 0;
+    }
+    else {
+        PyErr_Format(PyExc_TypeError,
+                     "integer argument expected, got '%.200s'",
+                     Py_TYPE(obj)->tp_name);
+        return 0;
+    }
+    *((Py_ssize_t *)result) = limit;
+    return 1;
+}
+
+
 static int
 iomodule_traverse(PyObject *mod, visitproc visit, void *arg) {
     _PyIO_State *state = IO_MOD_STATE(mod);
@@ -574,6 +598,7 @@ iomodule_traverse(PyObject *mod, visitproc visit, void *arg) {
     return 0;
 }
 
+
 static int
 iomodule_clear(PyObject *mod) {
     _PyIO_State *state = IO_MOD_STATE(mod);
@@ -591,6 +616,7 @@ iomodule_free(PyObject *mod) {
     iomodule_clear(mod);
 }
 
+
 /*
  * Module definition
  */

Modules/_io/_iomodule.h

@@ -19,6 +19,9 @@ extern PyTypeObject PyBufferedRandom_Type;
 extern PyTypeObject PyTextIOWrapper_Type;
 extern PyTypeObject PyIncrementalNewlineDecoder_Type;
 
+
+extern int _PyIO_ConvertSsize_t(PyObject *, void *);
+
 /* These functions are used as METH_NOARGS methods, are normally called
  * with args=NULL, and return a new reference.
  * BUT when args=Py_True is passed, they return a borrowed reference.

Modules/_io/bufferedio.c

@@ -716,7 +716,7 @@ buffered_read(buffered *self, PyObject *args)
     PyObject *res;
 
     CHECK_INITIALIZED(self)
-    if (!PyArg_ParseTuple(args, "|n:read", &n)) {
+    if (!PyArg_ParseTuple(args, "|O&:read", &_PyIO_ConvertSsize_t, &n)) {
         return NULL;
     }
     if (n < -1) {
@@ -949,10 +949,8 @@ buffered_readline(buffered *self, PyObject *args)
     Py_ssize_t limit = -1;
 
     CHECK_INITIALIZED(self)
-
-    if (!PyArg_ParseTuple(args, "|n:readline", &limit)) {
+    if (!PyArg_ParseTuple(args, "|O&:readline", &_PyIO_ConvertSsize_t, &limit))
         return NULL;
-    }
     return _buffered_readline(self, limit);
 }
 

Modules/_io/fileio.c

@@ -602,7 +602,7 @@ fileio_read(fileio *self, PyObject *args)
 	if (!self->readable)
 		return err_mode("reading");
 
-	if (!PyArg_ParseTuple(args, "|n", &size))
+	if (!PyArg_ParseTuple(args, "|O&", &_PyIO_ConvertSsize_t, &size))
 		return NULL;
 
         if (size < 0) {

Modules/_io/iobase.c

@@ -455,7 +455,7 @@ iobase_readline(PyObject *self, PyObject *args)
     PyObject *buffer, *result;
     Py_ssize_t old_size = -1;
 
-    if (!PyArg_ParseTuple(args, "|n:readline", &limit)) {
+    if (!PyArg_ParseTuple(args, "|O&:readline", &_PyIO_ConvertSsize_t, &limit)) {
         return NULL;
     }
 
@@ -577,16 +577,11 @@ static PyObject *
 iobase_readlines(PyObject *self, PyObject *args)
 {
     Py_ssize_t hint = -1, length = 0;
-    PyObject *hintobj = Py_None, *result;
+    PyObject *result;
 
-    if (!PyArg_ParseTuple(args, "|O:readlines", &hintobj)) {
+    if (!PyArg_ParseTuple(args, "|O&:readlines", &_PyIO_ConvertSsize_t, &hint)) {
         return NULL;
     }
-    if (hintobj != Py_None) {
-        hint = PyNumber_AsSsize_t(hintobj, PyExc_ValueError);
-        if (hint == -1 && PyErr_Occurred())
-            return NULL;
-    }
 
     result = PyList_New(0);
     if (result == NULL)

Modules/_io/textio.c

@@ -1479,7 +1479,7 @@ textiowrapper_read(textio *self, PyObject *args)
 
     CHECK_INITIALIZED(self);
 
-    if (!PyArg_ParseTuple(args, "|n:read", &n))
+    if (!PyArg_ParseTuple(args, "|O&:read", &_PyIO_ConvertSsize_t, &n))
         return NULL;
 
     CHECK_CLOSED(self);