Counter: Fix compiler warning about signed-unsigned comparison

2 files changed, 2 insertions, 1 deletions

diff --git a/src/_counter.c b/src/_counter.c
index a29b0ce..6579a5f 100644
--- a/src/_counter.c
+++ b/src/_counter.c
@@ -106,6 +106,7 @@ CounterObject_init(PCT_CounterObject *self, PyObject *args, PyObject *kwargs)
 
     /* Sanity-check pointers */
     assert(self->val <= self->p);
+    assert(self->buf_size >= 0);
     assert(self->p + self->nbytes <= self->val + self->buf_size);
     assert(self->val + PyBytes_GET_SIZE(self->prefix) == self->p);
     assert(PyBytes_GET_SIZE(self->prefix) + self->nbytes + PyBytes_GET_SIZE(self->suffix) == self->buf_size);
diff --git a/src/_counter.h b/src/_counter.h
index fc3e24e..f671094 100644
--- a/src/_counter.h
+++ b/src/_counter.h
@@ -38,7 +38,7 @@ typedef struct {
     PyBytesObject *prefix;     /* Prefix (useful for a nonce) */
     PyBytesObject *suffix;     /* Suffix (useful for a nonce) */
     uint8_t *val;       /* Buffer for our output string */
-    uint32_t buf_size;  /* Size of the buffer */
+    Py_ssize_t buf_size;/* Size of the buffer */
     uint8_t *p;         /* Pointer to the part of the buffer that we're allowed to update */
     uint16_t nbytes;    /* The number of bytes that from .p that are part of the counter */
     void (*inc_func)(void *);   /* Pointer to the counter increment function */