Undiamond Python headers

This change gets the Python codebase into a state where it conforms to
the conventions of this codebase. It's now possible to include headers
from Python, without worrying about ordering. Python has traditionally
solved that problem by "diamonding" everything in Python.h, but that's
problematic since it means any change to any Python header invalidates
all the build artifacts. Lastly it makes tooling not work. Since it is
hard to explain to Emacs when I press C-c C-h to add an import line it
shouldn't add the header that actually defines the symbol, and instead
do follow the nonstandard Python convention.

Progress has been made on letting Python load source code from the zip
executable structure via the standard C library APIs. System calss now
recognizes zip!FILENAME alternative URIs as equivalent to zip:FILENAME
since Python uses colon as its delimiter.

Some progress has been made on embedding the notice license terms into
the Python object code. This is easier said than done since Python has
an extremely complicated ownership story.

- Some termios APIs have been added
- Implement rewinddir() dirstream API
- GetCpuCount() API added to Cosmopolitan Libc
- More bugs in Cosmopolitan Libc have been fixed
- zipobj.com now has flags for mangling the path
- Fixed bug a priori with sendfile() on certain BSDs
- Polyfill F_DUPFD and F_DUPFD_CLOEXEC across platforms
- FIOCLEX / FIONCLEX now polyfilled for fast O_CLOEXEC changes
- APE now supports a hybrid solution to no-self-modify for builds
- Many BSD-only magnums added, e.g. O_SEARCH, O_SHLOCK, SF_NODISKIO

third_party/python/Include/dictobject.h

@@ -1,5 +1,6 @@
 #ifndef Py_DICTOBJECT_H
 #define Py_DICTOBJECT_H
+#include "third_party/python/Include/object.h"
 COSMOPOLITAN_C_START_
 /* clang-format off */
 
@@ -45,13 +46,13 @@ typedef struct {
 
 #endif /* Py_LIMITED_API */
 
-PyAPI_DATA(PyTypeObject) PyDict_Type;
-PyAPI_DATA(PyTypeObject) PyDictIterKey_Type;
-PyAPI_DATA(PyTypeObject) PyDictIterValue_Type;
-PyAPI_DATA(PyTypeObject) PyDictIterItem_Type;
-PyAPI_DATA(PyTypeObject) PyDictKeys_Type;
-PyAPI_DATA(PyTypeObject) PyDictItems_Type;
-PyAPI_DATA(PyTypeObject) PyDictValues_Type;
+extern PyTypeObject PyDict_Type;
+extern PyTypeObject PyDictIterKey_Type;
+extern PyTypeObject PyDictIterValue_Type;
+extern PyTypeObject PyDictIterItem_Type;
+extern PyTypeObject PyDictKeys_Type;
+extern PyTypeObject PyDictItems_Type;
+extern PyTypeObject PyDictValues_Type;
 
 #define PyDict_Check(op) \
                  PyType_FastSubclass(Py_TYPE(op), Py_TPFLAGS_DICT_SUBCLASS)
@@ -64,71 +65,71 @@ PyAPI_DATA(PyTypeObject) PyDictValues_Type;
     (PyDictKeys_Check(op) || PyDictItems_Check(op))
 
 
-PyAPI_FUNC(PyObject *) PyDict_New(void);
-PyAPI_FUNC(PyObject *) PyDict_GetItem(PyObject *mp, PyObject *key);
+PyObject * PyDict_New(void);
+PyObject * PyDict_GetItem(PyObject *mp, PyObject *key);
 #ifndef Py_LIMITED_API
-PyAPI_FUNC(PyObject *) _PyDict_GetItem_KnownHash(PyObject *mp, PyObject *key,
+PyObject * _PyDict_GetItem_KnownHash(PyObject *mp, PyObject *key,
                                        Py_hash_t hash);
 #endif
-PyAPI_FUNC(PyObject *) PyDict_GetItemWithError(PyObject *mp, PyObject *key);
+PyObject * PyDict_GetItemWithError(PyObject *mp, PyObject *key);
 #ifndef Py_LIMITED_API
-PyAPI_FUNC(PyObject *) _PyDict_GetItemIdWithError(PyObject *dp,
+PyObject * _PyDict_GetItemIdWithError(PyObject *dp,
                                                   struct _Py_Identifier *key);
-PyAPI_FUNC(PyObject *) PyDict_SetDefault(
+PyObject * PyDict_SetDefault(
     PyObject *mp, PyObject *key, PyObject *defaultobj);
 #endif
-PyAPI_FUNC(int) PyDict_SetItem(PyObject *mp, PyObject *key, PyObject *item);
+int PyDict_SetItem(PyObject *mp, PyObject *key, PyObject *item);
 #ifndef Py_LIMITED_API
-PyAPI_FUNC(int) _PyDict_SetItem_KnownHash(PyObject *mp, PyObject *key,
+int _PyDict_SetItem_KnownHash(PyObject *mp, PyObject *key,
                                           PyObject *item, Py_hash_t hash);
 #endif
-PyAPI_FUNC(int) PyDict_DelItem(PyObject *mp, PyObject *key);
+int PyDict_DelItem(PyObject *mp, PyObject *key);
 #ifndef Py_LIMITED_API
-PyAPI_FUNC(int) _PyDict_DelItem_KnownHash(PyObject *mp, PyObject *key,
+int _PyDict_DelItem_KnownHash(PyObject *mp, PyObject *key,
                                           Py_hash_t hash);
-PyAPI_FUNC(int) _PyDict_DelItemIf(PyObject *mp, PyObject *key,
+int _PyDict_DelItemIf(PyObject *mp, PyObject *key,
                                   int (*predicate)(PyObject *value));
 #endif
-PyAPI_FUNC(void) PyDict_Clear(PyObject *mp);
-PyAPI_FUNC(int) PyDict_Next(
+void PyDict_Clear(PyObject *mp);
+int PyDict_Next(
     PyObject *mp, Py_ssize_t *pos, PyObject **key, PyObject **value);
 #ifndef Py_LIMITED_API
 PyDictKeysObject *_PyDict_NewKeysForClass(void);
-PyAPI_FUNC(PyObject *) PyObject_GenericGetDict(PyObject *, void *);
-PyAPI_FUNC(int) _PyDict_Next(
+PyObject * PyObject_GenericGetDict(PyObject *, void *);
+int _PyDict_Next(
     PyObject *mp, Py_ssize_t *pos, PyObject **key, PyObject **value, Py_hash_t *hash);
 PyObject *_PyDictView_New(PyObject *, PyTypeObject *);
 #endif
-PyAPI_FUNC(PyObject *) PyDict_Keys(PyObject *mp);
-PyAPI_FUNC(PyObject *) PyDict_Values(PyObject *mp);
-PyAPI_FUNC(PyObject *) PyDict_Items(PyObject *mp);
-PyAPI_FUNC(Py_ssize_t) PyDict_Size(PyObject *mp);
-PyAPI_FUNC(PyObject *) PyDict_Copy(PyObject *mp);
-PyAPI_FUNC(int) PyDict_Contains(PyObject *mp, PyObject *key);
+PyObject * PyDict_Keys(PyObject *mp);
+PyObject * PyDict_Values(PyObject *mp);
+PyObject * PyDict_Items(PyObject *mp);
+Py_ssize_t PyDict_Size(PyObject *mp);
+PyObject * PyDict_Copy(PyObject *mp);
+int PyDict_Contains(PyObject *mp, PyObject *key);
 #ifndef Py_LIMITED_API
-PyAPI_FUNC(int) _PyDict_Contains(PyObject *mp, PyObject *key, Py_hash_t hash);
-PyAPI_FUNC(PyObject *) _PyDict_NewPresized(Py_ssize_t minused);
-PyAPI_FUNC(void) _PyDict_MaybeUntrack(PyObject *mp);
-PyAPI_FUNC(int) _PyDict_HasOnlyStringKeys(PyObject *mp);
+int _PyDict_Contains(PyObject *mp, PyObject *key, Py_hash_t hash);
+PyObject * _PyDict_NewPresized(Py_ssize_t minused);
+void _PyDict_MaybeUntrack(PyObject *mp);
+int _PyDict_HasOnlyStringKeys(PyObject *mp);
 Py_ssize_t _PyDict_KeysSize(PyDictKeysObject *keys);
 Py_ssize_t _PyDict_SizeOf(PyDictObject *);
-PyAPI_FUNC(PyObject *) _PyDict_Pop(PyObject *, PyObject *, PyObject *);
+PyObject * _PyDict_Pop(PyObject *, PyObject *, PyObject *);
 PyObject *_PyDict_Pop_KnownHash(PyObject *, PyObject *, Py_hash_t, PyObject *);
 PyObject *_PyDict_FromKeys(PyObject *, PyObject *, PyObject *);
 #define _PyDict_HasSplitTable(d) ((d)->ma_values != NULL)
 
-PyAPI_FUNC(int) PyDict_ClearFreeList(void);
+int PyDict_ClearFreeList(void);
 #endif
 
 /* PyDict_Update(mp, other) is equivalent to PyDict_Merge(mp, other, 1). */
-PyAPI_FUNC(int) PyDict_Update(PyObject *mp, PyObject *other);
+int PyDict_Update(PyObject *mp, PyObject *other);
 
 /* PyDict_Merge updates/merges from a mapping object (an object that
    supports PyMapping_Keys() and PyObject_GetItem()).  If override is true,
    the last occurrence of a key wins, else the first.  The Python
    dict.update(other) is equivalent to PyDict_Merge(dict, other, 1).
 */
-PyAPI_FUNC(int) PyDict_Merge(PyObject *mp,
+int PyDict_Merge(PyObject *mp,
                                    PyObject *other,
                                    int override);
 
@@ -138,8 +139,8 @@ PyAPI_FUNC(int) PyDict_Merge(PyObject *mp,
    of a key wins, if override is 2, a KeyError with conflicting key as
    argument is raised.
 */
-PyAPI_FUNC(int) _PyDict_MergeEx(PyObject *mp, PyObject *other, int override);
-PyAPI_FUNC(PyObject *) _PyDictView_Intersect(PyObject* self, PyObject *other);
+int _PyDict_MergeEx(PyObject *mp, PyObject *other, int override);
+PyObject * _PyDictView_Intersect(PyObject* self, PyObject *other);
 #endif
 
 /* PyDict_MergeFromSeq2 updates/merges from an iterable object producing
@@ -147,23 +148,23 @@ PyAPI_FUNC(PyObject *) _PyDictView_Intersect(PyObject* self, PyObject *other);
    of a key wins, else the first.  The Python dict constructor dict(seq2)
    is equivalent to dict={}; PyDict_MergeFromSeq(dict, seq2, 1).
 */
-PyAPI_FUNC(int) PyDict_MergeFromSeq2(PyObject *d,
+int PyDict_MergeFromSeq2(PyObject *d,
                                            PyObject *seq2,
                                            int override);
 
-PyAPI_FUNC(PyObject *) PyDict_GetItemString(PyObject *dp, const char *key);
+PyObject * PyDict_GetItemString(PyObject *dp, const char *key);
 #ifndef Py_LIMITED_API
-PyAPI_FUNC(PyObject *) _PyDict_GetItemId(PyObject *dp, struct _Py_Identifier *key);
+PyObject * _PyDict_GetItemId(PyObject *dp, struct _Py_Identifier *key);
 #endif /* !Py_LIMITED_API */
-PyAPI_FUNC(int) PyDict_SetItemString(PyObject *dp, const char *key, PyObject *item);
+int PyDict_SetItemString(PyObject *dp, const char *key, PyObject *item);
 #ifndef Py_LIMITED_API
-PyAPI_FUNC(int) _PyDict_SetItemId(PyObject *dp, struct _Py_Identifier *key, PyObject *item);
+int _PyDict_SetItemId(PyObject *dp, struct _Py_Identifier *key, PyObject *item);
 #endif /* !Py_LIMITED_API */
-PyAPI_FUNC(int) PyDict_DelItemString(PyObject *dp, const char *key);
+int PyDict_DelItemString(PyObject *dp, const char *key);
 
 #ifndef Py_LIMITED_API
-PyAPI_FUNC(int) _PyDict_DelItemId(PyObject *mp, struct _Py_Identifier *key);
-PyAPI_FUNC(void) _PyDict_DebugMallocStats(FILE *out);
+int _PyDict_DelItemId(PyObject *mp, struct _Py_Identifier *key);
+void _PyDict_DebugMallocStats(FILE *out);
 
 int _PyObjectDict_SetItem(PyTypeObject *tp, PyObject **dictptr, PyObject *name, PyObject *value);
 PyObject *_PyDict_LoadGlobal(PyDictObject *, PyDictObject *, PyObject *);