[11746] | 1 | /* ***** BEGIN LICENSE BLOCK *****
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| 2 | * Version: MPL 1.1/GPL 2.0/LGPL 2.1
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| 3 | *
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| 4 | * The contents of this file are subject to the Mozilla Public License Version
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| 5 | * 1.1 (the "License"); you may not use this file except in compliance with
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| 6 | * the License. You may obtain a copy of the License at
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| 7 | * http://www.mozilla.org/MPL/
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| 8 | *
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| 9 | * Software distributed under the License is distributed on an "AS IS" basis,
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| 10 | * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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| 11 | * for the specific language governing rights and limitations under the
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| 12 | * License.
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| 13 | *
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| 14 | * The Original Code is the Python XPCOM language bindings.
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| 15 | *
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| 16 | * The Initial Developer of the Original Code is
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| 17 | * ActiveState Tool Corp.
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| 18 | * Portions created by the Initial Developer are Copyright (C) 2000
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| 19 | * the Initial Developer. All Rights Reserved.
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| 20 | *
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| 21 | * Contributor(s):
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| 22 | * Mark Hammond <mhammond@skippinet.com.au> (original author)
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| 23 | *
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| 24 | * Alternatively, the contents of this file may be used under the terms of
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| 25 | * either the GNU General Public License Version 2 or later (the "GPL"), or
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| 26 | * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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| 27 | * in which case the provisions of the GPL or the LGPL are applicable instead
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| 28 | * of those above. If you wish to allow use of your version of this file only
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| 29 | * under the terms of either the GPL or the LGPL, and not to allow others to
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| 30 | * use your version of this file under the terms of the MPL, indicate your
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| 31 | * decision by deleting the provisions above and replace them with the notice
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| 32 | * and other provisions required by the GPL or the LGPL. If you do not delete
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| 33 | * the provisions above, a recipient may use your version of this file under
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| 34 | * the terms of any one of the MPL, the GPL or the LGPL.
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| 35 | *
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| 36 | * ***** END LICENSE BLOCK ***** */
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| 37 |
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| 38 | //
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| 39 | // This code is part of the XPCOM extensions for Python.
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| 40 | //
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| 41 | // Written September 2000 by Mark Hammond.
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| 42 | //
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| 43 | // Based heavily on the Python COM support, which is
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| 44 | // (c) Mark Hammond and Greg Stein.
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| 45 | //
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| 46 | // (c) 2000, ActiveState corp.
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| 47 |
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| 48 | #include "PyXPCOM_std.h"
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| 49 | #include "nsIInputStream.h"
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| 50 |
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| 51 | // Prevents us needing to use an nsIScriptableInputStream
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| 52 | // (and even that can't read binary data!!!)
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| 53 |
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| 54 | static nsIInputStream *GetI(PyObject *self) {
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| 55 | nsIID iid = NS_GET_IID(nsIInputStream);
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| 56 |
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| 57 | if (!Py_nsISupports::Check(self, iid)) {
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| 58 | PyErr_SetString(PyExc_TypeError, "This object is not the correct interface");
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| 59 | return NULL;
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| 60 | }
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| 61 | return (nsIInputStream *)Py_nsISupports::GetI(self);
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| 62 | }
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| 63 |
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| 64 | static PyObject *DoPyRead_Buffer(nsIInputStream *pI, PyObject *obBuffer, PRUint32 n)
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| 65 | {
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| 66 | PRUint32 nread;
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| 67 | void *buf;
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| 68 | #ifndef VBOX /* unsafe cast on 64-bit hosts. */
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| 69 | PRUint32 buf_len;
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| 70 | if (PyObject_AsWriteBuffer(obBuffer, &buf, (Py_ssize_t *)&buf_len) != 0) {
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| 71 | #else /* VBOX */
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| 72 | # if PY_VERSION_HEX >= 0x02050000 || defined(PY_SSIZE_T_MIN)
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| 73 | Py_ssize_t buf_len;
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| 74 | # else
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| 75 | int buf_len;
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| 76 | # endif /* VBOX */
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| 77 | if (PyObject_AsWriteBuffer(obBuffer, &buf, &buf_len) != 0) {
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| 78 | #endif
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| 79 | PyErr_Clear();
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| 80 | PyErr_SetString(PyExc_TypeError, "The buffer object does not have a write buffer!");
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| 81 | return NULL;
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| 82 | }
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| 83 | if (n==(PRUint32)-1) {
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| 84 | n = buf_len;
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| 85 | } else {
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| 86 | if (n > buf_len) {
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| 87 | NS_WARNING("Warning: PyIInputStream::read() was passed an integer size greater than the size of the passed buffer! Buffer size used.\n");
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| 88 | n = buf_len;
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| 89 | }
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| 90 | }
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| 91 | nsresult r;
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| 92 | Py_BEGIN_ALLOW_THREADS;
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| 93 | r = pI->Read((char *)buf, n, &nread);
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| 94 | Py_END_ALLOW_THREADS;
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| 95 | if ( NS_FAILED(r) )
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| 96 | return PyXPCOM_BuildPyException(r);
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| 97 | return PyInt_FromLong(nread);
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| 98 | }
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| 99 |
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| 100 | static PyObject *DoPyRead_Size(nsIInputStream *pI, PRUint32 n)
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| 101 | {
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| 102 | if (n==(PRUint32)-1) {
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| 103 | nsresult r;
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| 104 | Py_BEGIN_ALLOW_THREADS;
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| 105 | r = pI->Available(&n);
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| 106 | Py_END_ALLOW_THREADS;
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| 107 | if (NS_FAILED(r))
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| 108 | return PyXPCOM_BuildPyException(r);
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| 109 | }
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| 110 | if (n==0) { // mozilla will assert if we alloc zero bytes.
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[59809] | 111 | #if PY_MAJOR_VERSION <= 2
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[11746] | 112 | return PyBuffer_New(0);
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[59809] | 113 | #else
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| 114 | return PyBytes_FromString("");
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| 115 | #endif
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[11746] | 116 | }
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| 117 | char *buf = (char *)nsMemory::Alloc(n);
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| 118 | if (buf==NULL) {
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| 119 | PyErr_NoMemory();
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| 120 | return NULL;
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| 121 | }
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| 122 | nsresult r;
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| 123 | PRUint32 nread;
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| 124 | Py_BEGIN_ALLOW_THREADS;
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| 125 | r = pI->Read(buf, n, &nread);
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| 126 | Py_END_ALLOW_THREADS;
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| 127 | PyObject *rc = NULL;
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| 128 | if ( NS_SUCCEEDED(r) ) {
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[59809] | 129 | #if PY_MAJOR_VERSION <= 2
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[11746] | 130 | rc = PyBuffer_New(nread);
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| 131 | if (rc != NULL) {
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| 132 | void *ob_buf;
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| 133 | #ifndef VBOX /* unsafe cast on 64-bit hosts. */
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| 134 | PRUint32 buf_len;
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| 135 | if (PyObject_AsWriteBuffer(rc, &ob_buf, (Py_ssize_t *)&buf_len) != 0) {
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| 136 | #else /* VBOX */
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| 137 | # if PY_VERSION_HEX >= 0x02050000 || defined(PY_SSIZE_T_MIN)
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| 138 | Py_ssize_t buf_len;
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| 139 | # else
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| 140 | int buf_len;
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| 141 | # endif /* VBOX */
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| 142 | if (PyObject_AsWriteBuffer(rc, &ob_buf, &buf_len) != 0) {
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| 143 | #endif
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| 144 | // should never fail - we just created it!
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| 145 | return NULL;
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| 146 | }
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| 147 | if (buf_len != nread) {
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| 148 | PyErr_SetString(PyExc_RuntimeError, "New buffer isnt the size we create it!");
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| 149 | return NULL;
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| 150 | }
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| 151 | memcpy(ob_buf, buf, nread);
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| 152 | }
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[59809] | 153 | #else
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| 154 | rc = PyBytes_FromStringAndSize(buf, nread);
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| 155 | #endif
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[11746] | 156 | } else
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| 157 | PyXPCOM_BuildPyException(r);
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| 158 | nsMemory::Free(buf);
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| 159 | return rc;
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| 160 | }
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| 161 |
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| 162 | static PyObject *PyRead(PyObject *self, PyObject *args)
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| 163 | {
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| 164 | PyObject *obBuffer = NULL;
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| 165 | PRUint32 n = (PRUint32)-1;
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| 166 |
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| 167 | nsIInputStream *pI = GetI(self);
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| 168 | if (pI==NULL)
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| 169 | return NULL;
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| 170 | if (PyArg_ParseTuple(args, "|i", (int *)&n))
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| 171 | // This worked - no args, or just an int.
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| 172 | return DoPyRead_Size(pI, n);
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| 173 | // try our other supported arg format.
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| 174 | PyErr_Clear();
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| 175 | if (!PyArg_ParseTuple(args, "O|i", &obBuffer, (int *)&n)) {
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| 176 | PyErr_Clear();
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| 177 | PyErr_SetString(PyExc_TypeError, "'read()' must be called as (buffer_ob, int_size=-1) or (int_size=-1)");
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| 178 | return NULL;
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| 179 | }
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| 180 | return DoPyRead_Buffer(pI, obBuffer, n);
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| 181 | }
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| 182 |
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| 183 |
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| 184 | struct PyMethodDef
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| 185 | PyMethods_IInputStream[] =
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| 186 | {
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| 187 | { "read", PyRead, 1},
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| 188 | // The rest are handled as normal
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| 189 | {NULL}
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| 190 | };
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