Add PY_SSIZE_T_MIN, as suggested by Ralf W. Grosse-Kunstleve.

diff --git a/Include/pyport.h b/Include/pyport.h
index 9b5c54d708ef2b695ea2ad3e78caae396586941f..e0d9b7db5840b73c6a38f0dc3fe96b3a01cc34ab 100644 (file)
--- a/Include/pyport.h
+++ b/Include/pyport.h
@@ -99,6 +99,8 @@ typedef Py_intptr_t   Py_ssize_t;
 
 /* Largest positive value of type Py_ssize_t. */
 #define PY_SSIZE_T_MAX ((Py_ssize_t)(((size_t)-1)>>1))
+/* Smallest positive value of type Py_ssize_t. */
+#define PY_SSIZE_T_MIN (-PY_SSIZE_T_MAX-1)
 
 /* PY_FORMAT_SIZE_T is a platform-specific modifier for use in a printf
  * format to convert an argument with the width of a size_t or Py_ssize_t.

diff --git a/Objects/longobject.c b/Objects/longobject.c
index ebcce45cfee07299a6c70cc2677462b0406b7fa5..26f78c22e87baed9f6416fc74b1618e739ab0685 100644 (file)
--- a/Objects/longobject.c
+++ b/Objects/longobject.c
@@ -281,7 +281,7 @@ _long_as_ssize_t(PyObject *vv) {
        if (sign > 0) 
                return PY_SSIZE_T_MAX;
        else 
-               return -PY_SSIZE_T_MAX-1;
+               return PY_SSIZE_T_MIN;
 }
 
 /* Get a Py_ssize_t from a long int object.