[xemacs-hg @ 2001-05-31 12:45:27 by ben] xemacs-faq.texi: Major rewrite. Update all MS Windows info to current. Redo section 6.1 almost completely. Incorporate sections 1 and 2 of Hrvoje's FAQ. etags.el: Fix infloop when going up to the root. s\cygwin32.h: Don't unilaterally include ntplay, but only when we're compiling with native sound (look in configure now). event-msw.c: Fix yet more problems with C-g handling. Implement debug-mswindows-events. event-stream.c, events.h, signal.c, sysdep.h: Rearrange the signal-handling code to eliminate the former spaghetti logic paths in it. Document clearly what "low-level" and "high-level" timeouts are. Rename some functions with unclear names (e.g. "...alarm...") to names that reflect what they actually do (e.g. "...async_timeout..."). Fix numerous bugs discovered in the process. console-x.h, event-Xt.c, event-msw.c, frame-x.c: Hopefully make XEmacs properly maintain the "iconified" state on frames at all times. This should fix the "can't delete a frame with C-x 5 0 when there's another iconified frame out there" bug. Put a notice in of further changes that should probably be made to clean up the frame-visibility support. (especially directed at Jan Vroonhof) lisp.h, miscplay.c: Rename SBufbyte to CBufbyte to avoid a misleading name. Eliminate UChar, which is not used anywhere and contributes no semantic info. Add a comment about the documentation-only properties of the char/unsigned char typedefs. Add SChar_Binary as an explicitly `signed' version of Char_Binary and put back the `signed' declarations in miscplay.c. alloc.c: Use char typedefs. console-msw.c, device-msw.c, dialog-msw.c, editfns.c, fileio.c, glyphs-eimage.c, menubar-msw.c, ntplay.c, objects-msw.c, realpath.c, redisplay-msw.c, select-msw.c, syswindows.h, win32.c: Eliminate numerous C++ errors. frame-msw.c: Eliminate numerous C++ errors and Mule-ize. glyphs-msw.c: Eliminate numerous C++ errors and use char typedefs. configure.in: Fix problems detecting both native and Linux sound on Cygwin when compiled with --with-msw=no. Rearrange file-coding handling a bit to avoid warning when compiling with Mule. configure.in, configure.usage, INSTALL: Document XEMACS_CC and corresponding compiler option --xemacs-compiler. Explain how to build xemacs using a C++ compiler.

/*
 * 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 concat.h.  Note that we canonicalize the result, this avoids
   multiple slashes being interpreted as UNCs. */

#include "win32.h"
#include <stdarg.h>
#include <stdlib.h>
#include <string.h>

char * CDECL
concat (char *s, ...)
{
  int len;
  char *rv, *arg;
  va_list v;

  if (!s)
    return 0;

  len = strlen (s);

  va_start (v, s);
  while (1)
    {
      arg = va_arg (v, char *);
      if (arg == 0)
	break;
      len += strlen (arg);
    }
  va_end (v);

  rv = (char *) malloc (len+1);
  strcpy (rv, s);
  va_start (v, s);
  while (1)
  {
    arg = va_arg (v, char *);
    if (arg == 0)
      break;
    strcat (rv, arg);
  }
  va_end (v);

  /* concat is only used for urls and files, so we can safely
     canonicalize the results */
  char *d;
  for (s=rv; *s; s++)
    if (*s == '\\')
      *s = '/';
  for (s=d=rv; *s; s++)
    {
      *d++ = *s;
      /* special case for URLs */
      if (*s == ':' && s[1] == '/' && s[2] == '/' && s > rv+1)
	{
	  *d++ = *++s;
	  *d++ = *++s;
	}
      else if (*s == '/')
	while (s[1] == '/')
	  s++;
    }
  *d = 0;

  return rv;
}

char *
backslash (char *s)
{
  for (char *t = s; *t; t++)
    if (*t == '/')
      *t = '\\';
  return s;
}