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/*-------------------------------------------------------------------------
*
* plpython_system.h - pull in Python's system header files
*
* We break this out as a separate header file to precisely control
* the scope of the "system_header" pragma. No Postgres-specific
* declarations should be put here. However, we do include some stuff
* that is meant to prevent conflicts between our code and Python.
*
* Portions Copyright (c) 1996-2023, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* src/pl/plpython/plpython_system.h
*
*-------------------------------------------------------------------------
*/
#ifndef PLPYTHON_SYSTEM_H
#define PLPYTHON_SYSTEM_H
/*
* Newer versions of the Python headers trigger a lot of warnings with our
* preferred compiler flags (at least -Wdeclaration-after-statement is known
* to be problematic). The system_header pragma hides warnings from within
* the rest of this file, if supported.
*/
#ifdef HAVE_PRAGMA_GCC_SYSTEM_HEADER
#pragma GCC system_header
#endif
/*
* Undefine some things that get (re)defined in the Python headers. They aren't
* used by the PL/Python code, and all PostgreSQL headers should be included
* earlier, so this should be pretty safe.
*/
#undef _POSIX_C_SOURCE
#undef _XOPEN_SOURCE
/*
* Sometimes python carefully scribbles on our *printf macros.
* So we undefine them here and redefine them after it's done its dirty deed.
*/
#undef vsnprintf
#undef snprintf
#undef vsprintf
#undef sprintf
#undef vfprintf
#undef fprintf
#undef vprintf
#undef printf
#if defined(_MSC_VER) && defined(_DEBUG)
/* Python uses #pragma to bring in a non-default libpython on VC++ if
* _DEBUG is defined */
#undef _DEBUG
/* Also hide away errcode, since we load Python.h before postgres.h */
#define errcode __msvc_errcode
#include <Python.h>
#undef errcode
#define _DEBUG
#elif defined (_MSC_VER)
#define errcode __msvc_errcode
#include <Python.h>
#undef errcode
#else
#include <Python.h>
#endif
/*
* Python 2/3 strings/unicode/bytes handling. Python 2 has strings
* and unicode, Python 3 has strings, which are unicode on the C
* level, and bytes. The porting convention, which is similarly used
* in Python 2.6, is that "Unicode" is always unicode, and "Bytes" are
* bytes in Python 3 and strings in Python 2. Since we keep
* supporting Python 2 and its usual strings, we provide a
* compatibility layer for Python 3 that when asked to convert a C
* string to a Python string it converts the C string from the
* PostgreSQL server encoding to a Python Unicode object.
*/
#if PY_MAJOR_VERSION >= 3
#define PyString_Check(x) 0
#define PyString_AsString(x) PLyUnicode_AsString(x)
#define PyString_FromString(x) PLyUnicode_FromString(x)
#define PyString_FromStringAndSize(x, size) PLyUnicode_FromStringAndSize(x, size)
#endif
/*
* Python 3 only has long.
*/
#if PY_MAJOR_VERSION >= 3
#define PyInt_FromLong(x) PyLong_FromLong(x)
#define PyInt_AsLong(x) PyLong_AsLong(x)
#endif
/* Python 3 removed the Py_TPFLAGS_HAVE_ITER flag */
#if PY_MAJOR_VERSION >= 3
#define Py_TPFLAGS_HAVE_ITER 0
#endif
/* put back our *printf macros ... this must match src/include/port.h */
#ifdef vsnprintf
#undef vsnprintf
#endif
#ifdef snprintf
#undef snprintf
#endif
#ifdef vsprintf
#undef vsprintf
#endif
#ifdef sprintf
#undef sprintf
#endif
#ifdef vfprintf
#undef vfprintf
#endif
#ifdef fprintf
#undef fprintf
#endif
#ifdef vprintf
#undef vprintf
#endif
#ifdef printf
#undef printf
#endif
#define vsnprintf pg_vsnprintf
#define snprintf pg_snprintf
#define vsprintf pg_vsprintf
#define sprintf pg_sprintf
#define vfprintf pg_vfprintf
#define fprintf pg_fprintf
#define vprintf pg_vprintf
#define printf(...) pg_printf(__VA_ARGS__)
#endif /* PLPYTHON_SYSTEM_H */
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