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gh-90822: Redefined PY_SSIZE_T_MAX and PY_SSIZE_T_MIN #92071

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Merged
methane merged 1 commit into from
May 2, 2022
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gh-90822: Redefined PY_SSIZE_T_MAX and PY_SSIZE_T_MIN #92071

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11 changes: 6 additions & 5 deletions Include/pyport.h
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Original file line number Diff line number Diff line change
Expand Up @@ -114,17 +114,23 @@ typedef intptr_t Py_intptr_t;
/* Py_ssize_t is a signed integral type such that sizeof(Py_ssize_t) ==
* sizeof(size_t). C99 doesn't define such a thing directly (size_t is an
* unsigned integral type). See PEP 353 for details.
* PY_SSIZE_T_MAX is the largest positive value of type Py_ssize_t.
*/
#ifdef HAVE_PY_SSIZE_T

#elif HAVE_SSIZE_T
typedef ssize_t Py_ssize_t;
# define PY_SSIZE_T_MAX SSIZE_MAX
#elif SIZEOF_VOID_P == SIZEOF_SIZE_T
typedef Py_intptr_t Py_ssize_t;
# define PY_SSIZE_T_MAX INTPTR_MAX
#else
# error "Python needs a typedef for Py_ssize_t in pyport.h."
#endif

/* Smallest negative value of type Py_ssize_t. */
#define PY_SSIZE_T_MIN (-PY_SSIZE_T_MAX-1)
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/* Py_hash_t is the same size as a pointer. */
#define SIZEOF_PY_HASH_T SIZEOF_SIZE_T
typedef Py_ssize_t Py_hash_t;
Expand All @@ -138,11 +144,6 @@ typedef Py_ssize_t Py_ssize_clean_t;
/* Largest possible value of size_t. */
#define PY_SIZE_MAX SIZE_MAX

/* Largest positive value of type Py_ssize_t. */
#define PY_SSIZE_T_MAX ((Py_ssize_t)(((size_t)-1)>>1))
/* Smallest negative value of type Py_ssize_t. */
#define PY_SSIZE_T_MIN (-PY_SSIZE_T_MAX-1)

/* Macro kept for backward compatibility: use "z" in new code.
*
* PY_FORMAT_SIZE_T is a platform-specific modifier for use in a printf
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2 changes: 2 additions & 0 deletions PC/pyconfig.h
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Expand Up @@ -162,8 +162,10 @@ WIN32 is still required for the locale module.
/* Define like size_t, omitting the "unsigned" */
#ifdef MS_WIN64
typedef __int64 Py_ssize_t;
# define PY_SSIZE_T_MAX LLONG_MAX
#else
typedef _W64 int Py_ssize_t;
# define PY_SSIZE_T_MAX INT_MAX
#endif
#define HAVE_PY_SSIZE_T 1

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