Make whitespace changes

Status lines for Emacs and Vim have been added to Python sources so
they'll be easier to edit using Python's preferred coding style.

Some DNS helper functions have been broken up into multiple files. It's
nice to have one function per file whenever possible, since that way we
don't need -ffunction-sections.  Another reason it's good to have small
source files, is because the build will be enforcing resource limits on
compilation and testing soon.

third_party/python/Modules/ossaudiodev.c

@@ -1,6 +1,14 @@
+/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:4;tab-width:8;coding:utf-8 -*-│
+│vi: set net ft=c ts=4 sts=4 sw=4 fenc=utf-8                                :vi│
+╞══════════════════════════════════════════════════════════════════════════════╡
+│ Python 3                                                                     │
+│ https://docs.python.org/3/license.html                                       │
+╚─────────────────────────────────────────────────────────────────────────────*/
 #define PY_SSIZE_T_CLEAN
+#include "libc/sysv/consts/o.h"
 #include "third_party/python/Include/structmember.h"
 /* clang-format off */
+
 /*
  * ossaudiodev -- Python interface to the OSS (Open Sound System) API.
  *                This is the standard audio API for Linux and some
@@ -22,25 +30,8 @@
  * $Id$
  */
 
-#ifdef HAVE_FCNTL_H
-#include <fcntl.h>
-#else
-#define O_RDONLY 00
-#define O_WRONLY 01
-#endif
-
-#ifdef __linux__
-
-#ifndef HAVE_STDINT_H
-typedef unsigned long uint32_t;
-#endif
-
-#elif defined(__FreeBSD__)
-
-# ifndef SNDCTL_DSP_CHANNELS
-#  define SNDCTL_DSP_CHANNELS SOUND_PCM_WRITE_CHANNELS
-# endif
-
+#ifndef SNDCTL_DSP_CHANNELS
+#define SNDCTL_DSP_CHANNELS SOUND_PCM_WRITE_CHANNELS
 #endif
 
 typedef struct {
@@ -58,13 +49,10 @@ typedef struct {
     int      fd;                      /* The open mixer device */
 } oss_mixer_t;
 
-
 static PyTypeObject OSSAudioType;
 static PyTypeObject OSSMixerType;
-
 static PyObject *OSSAudioError;
 
-
 /* ----------------------------------------------------------------------
  * DSP object initialization/deallocation
  */
@@ -151,7 +139,6 @@ oss_dealloc(oss_audio_t *self)
     PyObject_Del(self);
 }
 
-
 /* ----------------------------------------------------------------------
  * Mixer object initialization/deallocation
  */
@@ -196,7 +183,6 @@ oss_mixer_dealloc(oss_mixer_t *self)
     PyObject_Del(self);
 }
 
-
 /* Methods to wrap the OSS ioctls.  The calling convention is pretty
    simple:
      nonblock()        -> ioctl(fd, SNDCTL_DSP_NONBLOCK)
@@ -204,7 +190,6 @@ oss_mixer_dealloc(oss_mixer_t *self)
      etc.
 */
 
-
 /* ----------------------------------------------------------------------
  * Helper functions
  */
@@ -249,7 +234,6 @@ _do_ioctl_1(int fd, PyObject *args, char *fname, int cmd)
     return PyLong_FromLong(arg);
 }
 
-
 /* _do_ioctl_1_internal() is a wrapper for ioctls that take no inputs
    but return an output -- ie. we need to pass a pointer to a local C
    variable so the driver can write its output there, but from Python
@@ -275,7 +259,6 @@ _do_ioctl_1_internal(int fd, PyObject *args, char *fname, int cmd)
 }
 
 
-
 /* _do_ioctl_0() is a private helper for the no-argument ioctls:
    SNDCTL_DSP_{SYNC,RESET,POST}. */
 static PyObject *
@@ -303,7 +286,6 @@ _do_ioctl_0(int fd, PyObject *args, char *fname, int cmd)
     return Py_None;
 }
 
-
 /* ----------------------------------------------------------------------
  * Methods of DSP objects (OSSAudioType)
  */
@@ -389,7 +371,6 @@ oss_post(oss_audio_t *self, PyObject *args)
     return _do_ioctl_0(self->fd, args, "post", SNDCTL_DSP_POST);
 }
 
-
 /* Regular file methods: read(), write(), close(), etc. as well
    as one convenience method, writeall(). */
 
@@ -551,7 +532,6 @@ oss_fileno(oss_audio_t *self, PyObject *unused)
     return PyLong_FromLong(self->fd);
 }
 
-
 /* Convenience methods: these generally wrap a couple of ioctls into one
    common task. */
 
@@ -639,7 +619,6 @@ _ssize(oss_audio_t *self, int *nchannels, int *ssize)
     return 0;
 }
 
-
 /* bufsize returns the size of the hardware audio buffer in number
    of samples */
 static PyObject *
@@ -727,7 +706,6 @@ oss_getptr(oss_audio_t *self, PyObject *unused)
     return Py_BuildValue("iii", info.bytes, info.blocks, info.ptr);
 }
 
-
 /* ----------------------------------------------------------------------
  * Methods of mixer objects (OSSMixerType)
  */
@@ -857,7 +835,6 @@ oss_mixer_set_recsrc(oss_mixer_t *self, PyObject *args)
         SOUND_MIXER_WRITE_RECSRC);
 }
 
-
 /* ----------------------------------------------------------------------
  * Method tables and other bureaucracy
  */
@@ -1022,7 +999,6 @@ static PyTypeObject OSSMixerType = {
     oss_mixer_methods,              /*tp_methods*/
 };
 
-
 static PyObject *
 ossopen(PyObject *self, PyObject *args)
 {
@@ -1041,15 +1017,12 @@ static PyMethodDef ossaudiodev_methods[] = {
     { 0, 0 },
 };
 
-
 #define _EXPORT_INT(mod, name) \
   if (PyModule_AddIntConstant(mod, #name, (long) (name)) == -1) return NULL;
 
-
 static char *control_labels[] = SOUND_DEVICE_LABELS;
 static char *control_names[] = SOUND_DEVICE_NAMES;
 
-
 static int
 build_namelists (PyObject *module)
 {
@@ -1092,7 +1065,6 @@ error1:
     return -1;
 }
 
-
 static struct PyModuleDef ossaudiodevmodule = {
         PyModuleDef_HEAD_INIT,
         "ossaudiodev",