Issue #11272: Fix input() and sys.stdin for Windows newline

On Windows, input() strips '\r' (and not only '\n'), and sys.stdin uses
universal newline (replace '\r\n' by '\n').

2 files changed, 19 insertions, 5 deletions

diff --git a/Python/bltinmodule.c b/Python/bltinmodule.c
index 42bc809..c6bb16c 100644
--- a/Python/bltinmodule.c
+++ b/Python/bltinmodule.c
@@ -1618,6 +1618,7 @@ builtin_input(PyObject *self, PyObject *args)
         PyObject *stdin_encoding;
         char *stdin_encoding_str;
         PyObject *result;
+        size_t len;
 
         stdin_encoding = PyObject_GetAttrString(fin, "encoding");
         if (!stdin_encoding)
@@ -1682,19 +1683,23 @@ builtin_input(PyObject *self, PyObject *args)
             Py_DECREF(stdin_encoding);
             return NULL;
         }
-        if (*s == '\0') {
+
+        len = strlen(s);
+        if (len == 0) {
             PyErr_SetNone(PyExc_EOFError);
             result = NULL;
         }
-        else { /* strip trailing '\n' */
-            size_t len = strlen(s);
+        else {
             if (len > PY_SSIZE_T_MAX) {
                 PyErr_SetString(PyExc_OverflowError,
                                 "input: input too long");
                 result = NULL;
             }
             else {
-                result = PyUnicode_Decode(s, len-1, stdin_encoding_str, NULL);
+                len--;   /* strip trailing '\n' */
+                if (len != 0 && s[len-1] == '\r')
+                    len--;   /* strip trailing '\r' */
+                result = PyUnicode_Decode(s, len, stdin_encoding_str, NULL);
             }
         }
         Py_DECREF(stdin_encoding);
diff --git a/Python/pythonrun.c b/Python/pythonrun.c
index 33f1873..8e97d7f 100644
--- a/Python/pythonrun.c
+++ b/Python/pythonrun.c
@@ -778,6 +778,7 @@ create_stdio(PyObject* io,
 {
     PyObject *buf = NULL, *stream = NULL, *text = NULL, *raw = NULL, *res;
     const char* mode;
+    const char* newline;
     PyObject *line_buffering;
     int buffering, isatty;
 
@@ -828,9 +829,17 @@ create_stdio(PyObject* io,
     Py_CLEAR(raw);
     Py_CLEAR(text);
 
+    newline = "\n";
+#ifdef MS_WINDOWS
+    if (!write_mode) {
+        /* translate \r\n to \n for sys.stdin on Windows */
+        newline = NULL;
+    }
+#endif
+
     stream = PyObject_CallMethod(io, "TextIOWrapper", "OsssO",
                                  buf, encoding, errors,
-                                 "\n", line_buffering);
+                                 newline, line_buffering);
     Py_CLEAR(buf);
     if (stream == NULL)
         goto error;