[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>
 *
 */

/* The purpose of this file is to doa recursive find on a given
   directory, calling a given function for each file found. */

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

#include "port.h"

static void (*for_each)(char *, unsigned int);
static char dir[_MAX_PATH], *found_part;

static int
find_sub ()
{
  WIN32_FIND_DATA wfd;
  HANDLE h;
  char *end = dir + strlen (dir);
  int rv = 0;

  *end++ = '/';
  strcpy (end, "*");

  h = FindFirstFile (dir, &wfd);

  if (h == INVALID_HANDLE_VALUE)
    return 0;

  do {
    if (strcmp (wfd.cFileName, ".") == 0
	|| strcmp (wfd.cFileName, "..") == 0)
      continue;

    strcpy (end, wfd.cFileName);

    if (wfd.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)
      find_sub ();
    else
      {
	for_each (found_part, wfd.nFileSizeLow);
	rv ++;
      }

  } while (FindNextFile (h, &wfd));

  FindClose (h);
  return rv;
}

int
find (char *starting_dir, void (*_for_each)(char *, unsigned int))
{
  strcpy (dir, starting_dir);
  for_each = _for_each;
  found_part = dir + strlen (dir) + 1;

  return find_sub ();
}