Issue #18701: Remove support of old CPython versions (<3.0) from C code.

Misc/NEWS

@@ -28,6 +28,8 @@ Core and Builtins
 Library
 -------
 
+- Issue #18701: Remove support of old CPython versions (<3.0) from C code.
+
 - Issue #18756: Improve error reporting in os.urandom() when the failure
   is due to something else than /dev/urandom not existing (for example,
   exhausting the file descriptor limit).

Modules/_ctypes/_ctypes.c

@@ -428,13 +428,7 @@ CDataType_from_buffer(PyObject *type, PyObject *args)
     StgDictObject *dict = PyType_stgdict(type);
     assert (dict);
 
-    if (!PyArg_ParseTuple(args,
-#if (PY_VERSION_HEX < 0x02050000)
-                          "O|i:from_buffer",
-#else
-                          "O|n:from_buffer",
-#endif
-                          &obj, &offset))
+    if (!PyArg_ParseTuple(args, "O|n:from_buffer", &obj, &offset))
         return NULL;
 
     if (-1 == PyObject_AsWriteBuffer(obj, &buffer, &buffer_len))
@@ -447,11 +441,7 @@ CDataType_from_buffer(PyObject *type, PyObject *args)
     }
     if (dict->size > buffer_len - offset) {
         PyErr_Format(PyExc_ValueError,
-#if (PY_VERSION_HEX < 0x02050000)
-                     "Buffer size too small (%d instead of at least %d bytes)",
-#else
                      "Buffer size too small (%zd instead of at least %zd bytes)",
-#endif
                      buffer_len, dict->size + offset);
         return NULL;
     }
@@ -484,13 +474,7 @@ CDataType_from_buffer_copy(PyObject *type, PyObject *args)
     StgDictObject *dict = PyType_stgdict(type);
     assert (dict);
 
-    if (!PyArg_ParseTuple(args,
-#if (PY_VERSION_HEX < 0x02050000)
-                          "O|i:from_buffer",
-#else
-                          "O|n:from_buffer",
-#endif
-                          &obj, &offset))
+    if (!PyArg_ParseTuple(args, "O|n:from_buffer", &obj, &offset))
         return NULL;
 
     if (-1 == PyObject_AsReadBuffer(obj, (const void**)&buffer, &buffer_len))
@@ -504,11 +488,7 @@ CDataType_from_buffer_copy(PyObject *type, PyObject *args)
 
     if (dict->size > buffer_len - offset) {
         PyErr_Format(PyExc_ValueError,
-#if (PY_VERSION_HEX < 0x02050000)
-                     "Buffer size too small (%d instead of at least %d bytes)",
-#else
                      "Buffer size too small (%zd instead of at least %zd bytes)",
-#endif
                      buffer_len, dict->size + offset);
         return NULL;
     }

Modules/_sqlite/cache.c

@@ -21,7 +21,6 @@
  * 3. This notice may not be removed or altered from any source distribution.
  */
 
-#include "sqlitecompat.h"
 #include "cache.h"
 #include <limits.h>
 

Modules/_sqlite/connection.c

@@ -29,7 +29,6 @@
 #include "cursor.h"
 #include "prepare_protocol.h"
 #include "util.h"
-#include "sqlitecompat.h"
 
 #include "pythread.h"
 

Modules/_sqlite/cursor.c

@@ -24,7 +24,6 @@
 #include "cursor.h"
 #include "module.h"
 #include "util.h"
-#include "sqlitecompat.h"
 
 PyObject* pysqlite_cursor_iternext(pysqlite_Cursor* self);
 

Modules/_sqlite/prepare_protocol.c

@@ -21,7 +21,6 @@
  * 3. This notice may not be removed or altered from any source distribution.
  */
 
-#include "sqlitecompat.h"
 #include "prepare_protocol.h"
 
 int pysqlite_prepare_protocol_init(pysqlite_PrepareProtocol* self, PyObject* args, PyObject* kwargs)

Modules/_sqlite/row.c

@@ -23,7 +23,6 @@
 
 #include "row.h"
 #include "cursor.h"
-#include "sqlitecompat.h"
 
 void pysqlite_row_dealloc(pysqlite_Row* self)
 {

Modules/_sqlite/statement.c

@@ -27,7 +27,6 @@
 #include "microprotocols.h"
 #include "prepare_protocol.h"
 #include "util.h"
-#include "sqlitecompat.h"
 
 /* prototypes */
 static int pysqlite_check_remaining_sql(const char* tail);

Modules/_sre.c

@@ -70,10 +70,6 @@ static char copyright[] =
 /* enables copy/deepcopy handling (work in progress) */
 #undef USE_BUILTIN_COPY
 
-#if PY_VERSION_HEX < 0x01060000
-#define PyObject_DEL(op) PyMem_DEL((op))
-#endif
-
 /* -------------------------------------------------------------------- */
 
 #if defined(_MSC_VER)
@@ -1993,10 +1989,8 @@ join_list(PyObject* list, PyObject* string)
     /* join list elements */
 
     PyObject* joiner;
-#if PY_VERSION_HEX >= 0x01060000
     PyObject* function;
     PyObject* args;
-#endif
     PyObject* result;
 
     joiner = PySequence_GetSlice(string, 0, 0);
@@ -2008,7 +2002,6 @@ join_list(PyObject* list, PyObject* string)
         return joiner;
     }
 
-#if PY_VERSION_HEX >= 0x01060000
     function = PyObject_GetAttrString(joiner, "join");
     if (!function) {
         Py_DECREF(joiner);
@@ -2024,12 +2017,6 @@ join_list(PyObject* list, PyObject* string)
     result = PyObject_CallObject(function, args);
     Py_DECREF(args); /* also removes list */
     Py_DECREF(function);
-#else
-    result = call(
-        "string", "join",
-        PyTuple_Pack(2, list, joiner)
-        );
-#endif
     Py_DECREF(joiner);
 
     return result;
@@ -2136,7 +2123,6 @@ error:
 
 }
 
-#if PY_VERSION_HEX >= 0x02020000
 static PyObject*
 pattern_finditer(PatternObject* pattern, PyObject* args, PyObject* kw)
 {
@@ -2158,7 +2144,6 @@ pattern_finditer(PatternObject* pattern, PyObject* args, PyObject* kw)
 
     return iterator;
 }
-#endif
 
 static PyObject*
 pattern_split(PatternObject* self, PyObject* args, PyObject* kw)
@@ -2581,10 +2566,8 @@ static PyMethodDef pattern_methods[] = {
         pattern_split_doc},
     {"findall", (PyCFunction) pattern_findall, METH_VARARGS|METH_KEYWORDS,
         pattern_findall_doc},
-#if PY_VERSION_HEX >= 0x02020000
     {"finditer", (PyCFunction) pattern_finditer, METH_VARARGS|METH_KEYWORDS,
         pattern_finditer_doc},
-#endif
     {"scanner", (PyCFunction) pattern_scanner, METH_VARARGS|METH_KEYWORDS},
     {"__copy__", (PyCFunction) pattern_copy, METH_NOARGS},
     {"__deepcopy__", (PyCFunction) pattern_deepcopy, METH_O},

Objects/stringlib/unicodedefs.h

@@ -24,13 +24,8 @@
 #define STRINGLIB_CHECK          PyUnicode_Check
 #define STRINGLIB_CHECK_EXACT    PyUnicode_CheckExact
 
-#if PY_VERSION_HEX < 0x03000000
-#define STRINGLIB_TOSTR          PyObject_Unicode
-#define STRINGLIB_TOASCII        PyObject_Repr
-#else
 #define STRINGLIB_TOSTR          PyObject_Str
 #define STRINGLIB_TOASCII        PyObject_ASCII
-#endif
 
 #define STRINGLIB_WANT_CONTAINS_OBJ 1
 

PC/VS9.0/_sqlite3.vcproj

@@ -554,10 +554,6 @@
 				RelativePath="..\..\Modules\_sqlite\row.h"
 				>
 			</File>
-			<File
-				RelativePath="..\..\Modules\_sqlite\sqlitecompat.h"
-				>
-			</File>
 			<File
 				RelativePath="..\..\Modules\_sqlite\statement.h"
 				>

PCbuild/_sqlite3.vcxproj

@@ -243,7 +243,6 @@
     <ClInclude Include="..\Modules\_sqlite\module.h" />
     <ClInclude Include="..\Modules\_sqlite\prepare_protocol.h" />
     <ClInclude Include="..\Modules\_sqlite\row.h" />
-    <ClInclude Include="..\Modules\_sqlite\sqlitecompat.h" />
     <ClInclude Include="..\Modules\_sqlite\statement.h" />
     <ClInclude Include="..\Modules\_sqlite\util.h" />
   </ItemGroup>

PCbuild/_sqlite3.vcxproj.filters

@@ -30,9 +30,6 @@
     <ClInclude Include="..\Modules\_sqlite\row.h">
       <Filter>Header Files</Filter>
     </ClInclude>
-    <ClInclude Include="..\Modules\_sqlite\sqlitecompat.h">
-      <Filter>Header Files</Filter>
-    </ClInclude>
     <ClInclude Include="..\Modules\_sqlite\statement.h">
       <Filter>Header Files</Filter>
     </ClInclude>