[xemacs-hg @ 2003-02-14 12:05:06 by ben] speedups to build process autoload.el: Factor out common code in generate-{c-,}file-autoloads-1 into new function generate-autoload-ish-1. \(I was originally going to use this for custom as well but ended up thinking better of it.) cus-dep.el: Cache the old computed values in custom-load.el and reuse them as necessary, to speed up running cus-dep (which would take 25-30 seconds to do all files in lisp/*, lisp/*/* on my Pentium III 700). Use `message' not `princ' to get correct newline behavior. Output messages showing each file we do actually process. update-elc-2.el: Rewrite algorithm to be much faster -- cache calls to directory-files and don't make needless calls to file-exists-p, file-directory-p because they're way way slow. Autoload early and only when update-elc has told us to. update-elc.el: If no files need byte compilation, signal to update-elc-2 to do any necessary autoload updating (using the file REBUILD_AUTOLOADS) rather than doing it ourselves, which would be way slow. Ignore updates to custom-load.el and auto-autoloads.el when checking to see whether autoloads need updating. Optimize out many unnecessary calls to file-exists-p to speed it up somewhat. (#### The remaining time is 50% or more in locate-file; this is presumably because, even though it has a cache, it's still statting each file to determine it's actually there. By calling directory-files ourselves, building a tree, and then looking in that tree, we could drastically shorten the time needed to do the locate operation.)

/*
 * Copyright (c) 2000, Red Hat, Inc.
 *
 *     This program is free software; you can redistribute it and/or modify
 *     it under the terms of the GNU General Public License as published by
 *     the Free Software Foundation; either version 2 of the License, or
 *     (at your option) any later version.
 *
 *     A copy of the GNU General Public License can be found at
 *     http://www.gnu.org/
 *
 * Written by DJ Delorie <dj@cygnus.com>
 *
 */

/* see mkdir.h */

#include "win32.h"
#include <stdio.h>
#include "mkdir.h"

int
mkdir_p (int isadir, char *path)
{
  char saved_char, *slash = 0;
  char *c;
  DWORD d, gse;

  d = GetFileAttributes (path);
  if (d != 0xffffffff && d & FILE_ATTRIBUTE_DIRECTORY)
    return 0;

  if (isadir)
    {
      if (CreateDirectory (path, 0))
	return 0;
      gse = GetLastError ();
      if (gse != ERROR_PATH_NOT_FOUND && gse != ERROR_FILE_NOT_FOUND)
	{
	  if (gse == ERROR_ALREADY_EXISTS)
	    {
	      fprintf (stderr, "warning: deleting \"%s\" so I can make a directory there\n",
		       path);
	      if (DeleteFileA (path))
		return mkdir_p (isadir, path);
	    }
	  return 1;
	}
    }

  for (c=path; *c; c++)
    {
      if (*c == ':')
	slash = 0;
      if (*c == '/' || *c == '\\')
	slash = c;
    }

  if (!slash)
    return 0;

  saved_char = *slash;
  *slash = 0;
  if (mkdir_p (1, path))
    {
      *slash = saved_char;
      return 1;
    }
  *slash = saved_char;

  if (!isadir)
    return 0;

  return mkdir_p (isadir, path);
}