Make fixes, improvements, and chibicc python bindings

- python now mixes audio 10x faster
- python octal notation is restored
- chibicc now builds code 3x faster
- chibicc now has help documentation
- chibicc can now generate basic python bindings
- linenoise now supports some paredit-like features

See #141

third_party/python/Python/cosmomodule.c

@@ -35,6 +35,7 @@
 #include "third_party/python/Include/moduleobject.h"
 #include "third_party/python/Include/pyerrors.h"
 #include "third_party/python/Include/pymacro.h"
+#include "third_party/python/Include/pyport.h"
 #include "third_party/python/Include/yoink.h"
 #include "third_party/xed/x86.h"
 /* clang-format off */
@@ -129,7 +130,7 @@ static PyObject *
 cosmo_ftrace(PyObject *self, PyObject *noargs)
 {
     ftrace_install();
-    return Py_None;
+    Py_RETURN_NONE;
 }
 
 PyDoc_STRVAR(crc32c_doc,

third_party/python/Python/getargs.c

@@ -968,7 +968,7 @@ convertsimple(PyObject *arg, const char **p_format, va_list *p_va, int flags,
                 *p = PyUnicode_AsUnicodeAndSize(arg, &len);
                 if (*p == NULL)
                     RETURN_ERR_OCCURRED;
-                if (Py_UNICODE_strlen(*p) != (size_t)len) {
+                if (wcslen(*p) != (size_t)len) {
                     PyErr_SetString(PyExc_ValueError, "embedded null character");
                     RETURN_ERR_OCCURRED;
                 }

third_party/python/Python/modsupport.c

@@ -301,7 +301,7 @@ do_mkvalue(const char **p_format, va_list *p_va, int flags)
             }
             else {
                 if (n < 0)
-                    n = Py_UNICODE_strlen(u);
+                    n = wcslen(u);
                 v = PyUnicode_FromUnicode(u, n);
             }
             return v;

third_party/python/Python/mystrtoul.c

@@ -137,11 +137,15 @@ PyOS_strtoul(const char *str, char **ptr, int base)
                 /* skip all zeroes... */
                 while (*str == '0')
                     ++str;
-                while (Py_ISSPACE(Py_CHARMASK(*str)))
-                    ++str;
-                if (ptr)
-                    *ptr = (char *)str;
-                return 0;
+                if ('0' <= *str && *str <= '7') {
+                    base = 8; /* [jart] restore octal */
+                } else {
+                    while (Py_ISSPACE(Py_CHARMASK(*str)))
+                        ++str;
+                    if (ptr)
+                        *ptr = (char *)str;
+                    return 0;
+                }
             }
         }
         else

third_party/python/Python/recursive.c

@@ -0,0 +1,32 @@
+/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
+│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8                                :vi│
+╞══════════════════════════════════════════════════════════════════════════════╡
+│ Copyright 2021 Justine Alexandra Roberts Tunney                              │
+│                                                                              │
+│ Permission to use, copy, modify, and/or distribute this software for         │
+│ any purpose with or without fee is hereby granted, provided that the         │
+│ above copyright notice and this permission notice appear in all copies.      │
+│                                                                              │
+│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL                │
+│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED                │
+│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE             │
+│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL         │
+│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR        │
+│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER               │
+│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR             │
+│ PERFORMANCE OF THIS SOFTWARE.                                                │
+╚─────────────────────────────────────────────────────────────────────────────*/
+#include "third_party/python/Include/ceval.h"
+/* clang-format off */
+
+int
+(Py_EnterRecursiveCall)(const char *where)
+{
+    return Py_EnterRecursiveCall(where);
+}
+
+void
+(Py_LeaveRecursiveCall)(void)
+{
+    Py_LeaveRecursiveCall();
+}