diff options
| -rw-r--r-- | Misc/NEWS | 2 | ||||
| -rw-r--r-- | Modules/_io/fileio.c | 13 |
2 files changed, 13 insertions, 2 deletions
@@ -10,6 +10,8 @@ What's New in Python 3.4.0 Alpha 1? Core and Builtins ----------------- +- Issue #16367: Fix FileIO.readall() on Windows for files larger than 2 GB. + - Issue #16761: Calling int() with base argument only now raises TypeError. - Issue #16759: Support the full DWORD (unsigned long) range in Reg2Py diff --git a/Modules/_io/fileio.c b/Modules/_io/fileio.c index beacd9f..34425b7 100644 --- a/Modules/_io/fileio.c +++ b/Modules/_io/fileio.c @@ -602,7 +602,7 @@ fileio_readall(fileio *self) #endif PyObject *result; Py_ssize_t total = 0; - int n; + Py_ssize_t n; size_t newsize; if (self->fd < 0) @@ -651,9 +651,18 @@ fileio_readall(fileio *self) } Py_BEGIN_ALLOW_THREADS errno = 0; + n = newsize - total; +#if defined(MS_WIN64) || defined(MS_WINDOWS) + if (n > INT_MAX) + n = INT_MAX; + n = read(self->fd, + PyBytes_AS_STRING(result) + total, + (int)n); +#else n = read(self->fd, PyBytes_AS_STRING(result) + total, - newsize - total); + n); +#endif Py_END_ALLOW_THREADS if (n == 0) break; |