[Python-Dev] A cast from Py_ssize_t to long (original) (raw)

Alexander Belopolsky alexander.belopolsky at gmail.com
Mon Aug 21 16:47:35 CEST 2006

On Aug 21, 2006, at 10:34 AM, Thomas Wouters wrote:

Is there a simple automated way to detect situations like this? Maybe there is a win64 compiler that would generate a warning. I doubt it. Explicit casts are meant to silence warnings (among other things.) Warning for all casts is bound to generate quite a lot of warnings.

There are also cases of implicit casts like this that were not
caught so far:

static Py_ssize_t mmap_buffer_getreadbuf(mmap_object *self, Py_ssize_t index, const
void **ptr) { ... return self->size; }

static Py_ssize_t mmap_buffer_getwritebuf(mmap_object *self, Py_ssize_t index, const
void **ptr) { ... return self->size; }

I don't have any system with sizeof(size_t) != sizeof(long), but it
maybe worth the effort to review the warnings on such system.

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