--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/print.c	Mon Aug 13 08:45:50 2007 +0200
@@ -0,0 +1,1532 @@
+/* Lisp object printing and output streams.
+   Copyright (C) 1985, 1986, 1988, 1992-1995 Free Software Foundation, Inc.
+   Copyright (C) 1995, 1996 Ben Wing.
+
+This file is part of XEmacs.
+
+XEmacs 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, or (at your option) any
+later version.
+
+XEmacs is distributed in the hope that it will be useful, but WITHOUT
+ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+for more details.
+
+You should have received a copy of the GNU General Public License
+along with XEmacs; see the file COPYING.  If not, write to
+the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+Boston, MA 02111-1307, USA.  */
+
+/* Synched up with: Not synched with FSF. */
+
+/* This file has been Mule-ized. */
+
+/* Seriously hacked on by Ben Wing for Mule. */
+
+#include <config.h>
+#include "lisp.h"
+
+#ifndef standalone
+#include "backtrace.h"
+#include "buffer.h"
+#include "bytecode.h"
+#include "console-tty.h"
+#include "console-stream.h"
+#include "extents.h"
+#include "frame.h"
+#include "emacsfns.h"
+#include "insdel.h"
+#include "lstream.h"
+
+#endif /* not standalone */
+
+Lisp_Object Vstandard_output, Qstandard_output;
+
+/* The subroutine object for external-debugging-output is kept here
+   for the convenience of the debugger.  */
+Lisp_Object Qexternal_debugging_output;
+Lisp_Object Qalternate_debugging_output;
+ 
+/* Avoid actual stack overflow in print.  */
+static int print_depth;
+
+/* Maximum length of list or vector to print in full; noninteger means
+   effectively infinity */
+
+Lisp_Object Vprint_length;
+Lisp_Object Qprint_length;
+
+/* Maximum length of string to print in full; noninteger means
+   effectively infinity */
+
+Lisp_Object Vprint_string_length;
+Lisp_Object Qprint_string_length;
+
+/* Maximum depth of list to print in full; noninteger means
+   effectively infinity.  */
+
+Lisp_Object Vprint_level;
+
+/* Label to use when making echo-area messages. */
+
+Lisp_Object Vprint_message_label;
+
+/* Nonzero means print newlines in strings as \n.  */
+
+int print_escape_newlines;
+int print_readably;
+int print_gensym;
+
+Lisp_Object Qprint_escape_newlines;
+Lisp_Object Qprint_readably;
+
+/* Force immediate output of all printed data.  Used for debugging. */
+int print_unbuffered;
+
+FILE *termscript;	/* Stdio stream being used for copy of all output.  */
+
+
+
+int stdout_needs_newline;
+
+/* Write a string (in internal format) to stdio stream STREAM. */
+   
+void
+write_string_to_stdio_stream (FILE *stream, struct console *con,
+			      CONST Bufbyte *str,
+			      Bytecount offset, Bytecount len,
+			      enum external_data_format fmt)
+{
+  int extlen;
+  CONST Extbyte *extptr;
+
+  GET_CHARPTR_EXT_DATA_ALLOCA (str + offset, len, fmt, extptr, extlen);
+  if (stream)
+    fwrite (extptr, 1, extlen, stream);
+  else
+    {
+      assert (CONSOLE_TTY_P (con));
+      Lstream_write (XLSTREAM (CONSOLE_TTY_DATA (con)->outstream),
+		     extptr, extlen);
+    }
+  if (stream == stdout || stream == stderr ||
+      (!stream && CONSOLE_TTY_DATA (con)->is_stdio))
+    {
+      if (termscript)
+	{
+	  fwrite (extptr, 1, extlen, termscript);
+	  fflush (termscript);
+	}
+      stdout_needs_newline = (extptr[extlen - 1] != '\n');
+    }
+}
+
+/* Write a string to the output location specified in FUNCTION.
+   Arguments NONRELOC, RELOC, OFFSET, and LEN are as in
+   buffer_insert_string_1() in insdel.c. */
+
+static void
+output_string (Lisp_Object function, CONST Bufbyte *nonreloc,
+	       Lisp_Object reloc, Bytecount offset, Bytecount len)
+{
+  /* This function can GC */
+  Charcount ccoff, cclen;
+  /* We change the value of nonreloc (fetching it from reloc as
+     necessary), but we don't want to pass this changed value on to
+     other functions that take both a nonreloc and a reloc, or things
+     may get confused and an assertion failure in
+     fixup_internal_substring() may get triggered. */
+  CONST Bufbyte *newnonreloc = nonreloc;
+  struct gcpro gcpro1, gcpro2;
+
+  /* Emacs won't print whilst GCing, but an external debugger might */
+  if (gc_in_progress) return;
+
+  /* Perhaps not necessary but probably safer. */
+  GCPRO2 (function, reloc);
+
+  fixup_internal_substring (newnonreloc, reloc, offset, &len);
+
+  if (STRINGP (reloc))
+    newnonreloc = string_data (XSTRING (reloc));
+
+  ccoff = bytecount_to_charcount (newnonreloc, offset);
+  cclen = bytecount_to_charcount (newnonreloc + offset, len);
+
+  if (LSTREAMP (function))
+    {
+      /* Lstream_write() could easily cause GC inside of it, if the
+	 stream is a print-stream. (It will call output_string()
+	 recursively.) This is probably the fastest way to fix this
+	 problem. (alloca() is very fast on machines that have it
+	 built-in, and you avoid some nasty problems with recursion
+	 that could result from using a static buffer somewhere.)
+
+	 The other possibility is to inhibit GC, but that of course
+	 would require an unwind-protect, which is usually a lot
+	 slower than the small amount of memcpy()ing that happens
+	 here. */
+      if (STRINGP (reloc))
+	{
+	  Bufbyte *copied = (Bufbyte *) alloca (len);
+	  memcpy (copied, newnonreloc + offset, len);
+	  Lstream_write (XLSTREAM (function), copied, len);
+	}
+      else
+	Lstream_write (XLSTREAM (function), newnonreloc + offset, len);
+
+      if (print_unbuffered)
+	Lstream_flush (XLSTREAM (function));
+    }
+
+#ifndef standalone
+  else if (BUFFERP (function))
+    {
+      CHECK_LIVE_BUFFER (function);
+      buffer_insert_string (XBUFFER (function), nonreloc, reloc, offset, len);
+    }
+  else if (MARKERP (function))
+    {
+      /* marker_position will err if marker doesn't point anywhere */
+      Bufpos spoint = marker_position (function);
+
+      buffer_insert_string_1 (XBUFFER (Fmarker_buffer (function)),
+			      spoint, nonreloc, reloc, offset, len,
+			      0);
+      Fset_marker (function, make_int (spoint + cclen),
+		   Fmarker_buffer (function));
+    }
+  else if (FRAMEP (function))
+    {
+      struct frame *f = XFRAME (function);
+      if (!EQ (Vprint_message_label, echo_area_status (f)))
+	clear_echo_area_from_print (f, Qnil, 1);
+      echo_area_append (f, nonreloc, reloc, offset, len, Vprint_message_label);
+    }
+#endif /* not standalone */
+  else if (EQ (function, Qt) || EQ (function, Qnil))
+    {
+      write_string_to_stdio_stream (stdout, 0, newnonreloc, offset, len,
+				    FORMAT_DISPLAY);
+    }
+  else
+    {
+      Charcount iii;
+
+      for (iii = ccoff; iii < cclen + ccoff; iii++)
+	{
+	  call1 (function,
+		 make_char (charptr_emchar_n (newnonreloc, iii)));
+	  if (STRINGP (reloc))
+	    newnonreloc = string_data (XSTRING (reloc));
+	}
+    }
+
+  UNGCPRO;
+}
+
+struct print_stream
+{
+  FILE *file;
+  Lisp_Object fun;
+};
+
+#define get_print_stream(stream) \
+  ((struct print_stream *) Lstream_data (stream))
+
+DEFINE_LSTREAM_IMPLEMENTATION ("print", lstream_print,
+			       sizeof (struct print_stream));
+
+static Lisp_Object
+make_print_output_stream (FILE *file, Lisp_Object fun)
+{
+  Lstream *str = Lstream_new (lstream_print, "w");
+  struct print_stream *ps = get_print_stream (str);
+  Lisp_Object val = Qnil;
+
+  Lstream_set_character_mode (str);
+  ps->file = file;
+  ps->fun = fun;
+  XSETLSTREAM (val, str);
+  return val;
+}
+
+/* #### This isn't being used anywhere at the moment.  Is it supposed
+   to be? */
+#if 0
+static void
+reset_print_stream (Lstream *str, FILE *file, Lisp_Object fun)
+{
+  struct print_stream *ps = get_print_stream (str);
+
+  Lstream_reopen (str);
+  ps->file = file;
+  ps->fun = fun;
+}
+#endif
+
+static Lisp_Object
+print_marker (Lisp_Object obj, void (*markobj) (Lisp_Object))
+{
+  return get_print_stream (XLSTREAM (obj))->fun;
+}
+
+static int
+print_writer (Lstream *stream, CONST unsigned char *data, int size)
+{
+  struct print_stream *ps = get_print_stream (stream);
+
+  if (ps->file)
+    {
+      write_string_to_stdio_stream (ps->file, 0, data, 0, size,
+				    FORMAT_DISPLAY);
+      /* Make sure it really gets written now. */
+      if (print_unbuffered)
+	fflush (ps->file);
+    }
+  else
+    output_string (ps->fun, data, Qnil, 0, size);
+  return size;
+}
+
+static Lisp_Object
+canonicalize_printcharfun (Lisp_Object printcharfun)
+{
+  if (NILP (printcharfun))
+    printcharfun = Vstandard_output;
+
+  if (EQ (printcharfun, Qt) || NILP (printcharfun))
+    {
+#ifndef standalone
+      printcharfun = Fselected_frame (Qnil); /* print to minibuffer */
+#endif
+    }
+  return (printcharfun);
+}
+
+
+static Lisp_Object
+print_prepare (Lisp_Object printcharfun)
+{
+  FILE *stdio_stream = 0;
+
+  /* Emacs won't print whilst GCing, but an external debugger might */
+  if (gc_in_progress)
+    return (Qnil);
+
+  printcharfun = canonicalize_printcharfun (printcharfun);
+  if (EQ (printcharfun, Qnil))
+    {
+      stdio_stream = stdout;
+    }
+#if 0 /* Don't bother */
+  else if (SUBRP (indirect_function (printcharfun, 0))
+           && (XSUBR (indirect_function (printcharfun, 0)) 
+               == Sexternal_debugging_output))
+    {
+      stdio_stream = stderr;
+    }
+#endif
+  
+  return make_print_output_stream (stdio_stream, printcharfun);
+}
+
+static void
+print_finish (Lisp_Object stream)
+{
+  /* Emacs won't print whilst GCing, but an external debugger might */
+  if (gc_in_progress)
+    return;
+
+  Lstream_delete (XLSTREAM (stream));
+}
+
+#if 1 /* Prefer space over "speed" */
+#define write_char_internal(string_of_length_1, stream) \
+  write_string_1 ((CONST Bufbyte *) (string_of_length_1), 1, (stream))
+#else
+#define write_char_internal(string_of_length_1, stream) \
+  output_string ((stream), (CONST Bufbyte *) (string_of_length_1), Qnil, 0, 1)
+#endif
+
+/* NOTE:  Do not call this with the data of a Lisp_String,
+ *  as printcharfun might cause a GC, which might cause
+ *  the string's data to be relocated.
+ *  Use print_object_internal (string, printcharfun, 0)
+ *  to princ a Lisp_String
+ * Note: "stream" should be the result of "canonicalize_printcharfun"
+ *  (ie Qnil means stdout, not Vstandard_output, etc)
+ */
+void
+write_string_1 (CONST Bufbyte *str, Bytecount size, Lisp_Object stream)
+{
+  /* This function can GC */
+  assert (size >= 0);
+  output_string (stream, str, Qnil, 0, size);
+}
+
+void
+write_c_string (CONST char *str, Lisp_Object stream)
+{
+  /* This function can GC */
+  write_string_1 ((CONST Bufbyte *) str, strlen (str), stream);
+}
+
+
+DEFUN ("write-char", Fwrite_char, Swrite_char, 1, 2, 0 /*
+Output character CH to stream STREAM.
+STREAM defaults to the value of `standard-output' (which see).
+*/ )
+  (ch, stream)
+     Lisp_Object ch, stream;
+{
+  /* This function can GC */
+  Bufbyte str[MAX_EMCHAR_LEN];
+  Bytecount len;
+
+  CHECK_CHAR_COERCE_INT (ch);
+  len = set_charptr_emchar (str, XCHAR (ch));
+  output_string (canonicalize_printcharfun (stream), str, Qnil, 0, len);
+  return ch;
+}
+
+#ifndef standalone
+
+void
+temp_output_buffer_setup (CONST char *bufname)
+{
+  /* This function can GC */
+  struct buffer *old = current_buffer;
+  Lisp_Object buf;
+
+#ifdef I18N3
+  /* #### This function should accept a Lisp_Object instead of a char *,
+     so that proper translation on the buffer name can occur. */
+#endif
+
+  Fset_buffer (Fget_buffer_create (build_string (bufname)));
+
+  current_buffer->read_only = Qnil;
+  Ferase_buffer (Fcurrent_buffer ());
+
+  XSETBUFFER (buf, current_buffer);
+  specbind (Qstandard_output, buf);
+
+  set_buffer_internal (old);
+}
+
+Lisp_Object
+internal_with_output_to_temp_buffer (CONST char *bufname, 
+                                     Lisp_Object (*function) (Lisp_Object arg),
+                                     Lisp_Object arg, 
+                                     Lisp_Object same_frame)
+{
+  int speccount = specpdl_depth ();
+  struct gcpro gcpro1, gcpro2, gcpro3;
+  Lisp_Object buf = Qnil;
+
+  GCPRO3 (buf, arg, same_frame);
+
+  temp_output_buffer_setup (GETTEXT (bufname));
+  buf = Vstandard_output;
+
+  arg = (*function) (arg);
+
+  temp_output_buffer_show (buf, same_frame);
+  UNGCPRO;
+
+  return unbind_to (speccount, arg);
+}
+
+DEFUN ("with-output-to-temp-buffer", Fwith_output_to_temp_buffer, Swith_output_to_temp_buffer,
+       1, UNEVALLED, 0 /*
+Bind `standard-output' to buffer BUFNAME, eval BODY, then show that buffer.
+The buffer is cleared out initially, and marked as unmodified when done.
+All output done by BODY is inserted in that buffer by default.
+The buffer is displayed in another window, but not selected.
+The value of the last form in BODY is returned.
+If BODY does not finish normally, the buffer BUFNAME is not displayed.
+
+If variable `temp-buffer-show-function' is non-nil, call it at the end
+to get the buffer displayed.  It gets one argument, the buffer to display.
+*/ )
+  (args)
+     Lisp_Object args;
+{
+  /* This function can GC */
+  struct gcpro gcpro1;
+  Lisp_Object name;
+  int speccount = specpdl_depth ();
+  Lisp_Object buf, val;
+
+#ifdef I18N3
+  /* #### should set the buffer to be translating.  See print_internal(). */
+#endif
+
+  GCPRO1 (args);
+  name = Feval (Fcar (args));
+  UNGCPRO;
+
+  CHECK_STRING (name);
+  temp_output_buffer_setup ((char *) string_data (XSTRING (name)));
+  buf = Vstandard_output;
+
+  val = Fprogn (Fcdr (args));
+
+  temp_output_buffer_show (buf, Qnil);
+
+  return unbind_to (speccount, val);
+}
+#endif /* not standalone */
+
+DEFUN ("terpri", Fterpri, Sterpri, 0, 1, 0 /*
+Output a newline to STREAM.
+If STREAM is omitted or nil, the value of `standard-output' is used.
+*/ )
+  (stream)
+     Lisp_Object stream;
+{
+  /* This function can GC */
+  Bufbyte str[1];
+  str[0] = '\n';
+  output_string (canonicalize_printcharfun (stream), str, Qnil, 0, 1);
+  return Qt;
+}
+
+DEFUN ("prin1", Fprin1, Sprin1, 1, 2, 0 /*
+Output the printed representation of OBJECT, any Lisp object.
+Quoting characters are printed when needed to make output that `read'
+can handle, whenever this is possible.
+Output stream is STREAM, or value of `standard-output' (which see).
+*/ )
+  (object, stream)
+     Lisp_Object object, stream;
+{
+  /* This function can GC */
+  Lisp_Object the_stream = Qnil;
+  struct gcpro gcpro1, gcpro2, gcpro3;
+
+  GCPRO3 (object, stream, the_stream);
+  print_depth = 0;
+  the_stream = print_prepare (stream);
+  print_internal (object, the_stream, 1);
+  print_finish (the_stream);
+  UNGCPRO;
+  return object;
+}
+
+/* a buffer which is used to hold output being built by prin1-to-string */
+Lisp_Object Vprin1_to_string_buffer;
+
+DEFUN ("prin1-to-string", Fprin1_to_string, Sprin1_to_string, 1, 2, 0 /*
+Return a string containing the printed representation of OBJECT,
+any Lisp object.  Quoting characters are used when needed to make output
+that `read' can handle, whenever this is possible, unless the optional
+second argument NOESCAPE is non-nil.
+*/ )
+  (object, noescape)
+     Lisp_Object object, noescape;
+{
+  /* This function can GC */
+  Lisp_Object old = Fcurrent_buffer ();
+  struct buffer *out = XBUFFER (Vprin1_to_string_buffer);
+  Lisp_Object stream = Qnil;
+  struct gcpro gcpro1, gcpro2, gcpro3;
+
+  GCPRO3 (object, old, stream);
+  stream = print_prepare (Vprin1_to_string_buffer);
+  set_buffer_internal (out);
+  Ferase_buffer (Fcurrent_buffer ());
+  print_depth = 0;
+  print_internal (object, stream, NILP (noescape));
+  print_finish (stream);
+  stream = Qnil;                /* No GC surprises! */
+  object = make_string_from_buffer (out, 
+				    BUF_BEG (out),
+				    BUF_Z (out) - 1);
+  Ferase_buffer (Fcurrent_buffer ());
+  Fset_buffer (old);
+  UNGCPRO;
+  return (object);
+}
+
+DEFUN ("princ", Fprinc, Sprinc, 1, 2, 0 /*
+Output the printed representation of OBJECT, any Lisp object.
+No quoting characters are used; no delimiters are printed around
+the contents of strings.
+Output stream is STREAM, or value of standard-output (which see).
+*/ )
+  (obj, stream)
+     Lisp_Object obj, stream;
+{
+  /* This function can GC */
+  Lisp_Object the_stream = Qnil;
+  struct gcpro gcpro1, gcpro2, gcpro3;
+
+  GCPRO3 (obj, stream, the_stream);
+  the_stream = print_prepare (stream);
+  print_depth = 0;
+  print_internal (obj, the_stream, 0);
+  print_finish (the_stream);
+  UNGCPRO;
+  return (obj);
+}
+
+DEFUN ("print", Fprint, Sprint, 1, 2, 0 /*
+Output the printed representation of OBJECT, with newlines around it.
+Quoting characters are printed when needed to make output that `read'
+can handle, whenever this is possible.
+Output stream is STREAM, or value of `standard-output' (which see).
+*/ )
+  (obj, stream)
+     Lisp_Object obj, stream;
+{
+  /* This function can GC */
+  Lisp_Object the_stream = Qnil;
+  struct gcpro gcpro1, gcpro2, gcpro3;
+
+  GCPRO3 (obj, stream, the_stream);
+  the_stream = print_prepare (stream);
+  print_depth = 0;
+  write_char_internal ("\n", the_stream);
+  print_internal (obj, the_stream, 1);
+  write_char_internal ("\n", the_stream);
+  print_finish (the_stream);
+  UNGCPRO;
+  return obj;
+}
+
+#ifdef LISP_FLOAT_TYPE
+
+Lisp_Object Vfloat_output_format;
+Lisp_Object Qfloat_output_format;
+
+void
+float_to_string (char *buf, double data)
+/*
+ * This buffer should be at least as large as the max string size of the
+ * largest float, printed in the biggest notation.  This is undoubtably
+ * 20d float_output_format, with the negative of the C-constant "HUGE"
+ * from <math.h>.
+ * 
+ * On the vax the worst case is -1e38 in 20d format which takes 61 bytes.
+ * 
+ * I assume that IEEE-754 format numbers can take 329 bytes for the worst
+ * case of -1e307 in 20d float_output_format. What is one to do (short of
+ * re-writing _doprnt to be more sane)?
+ * 			-wsr
+ */
+{
+  Bufbyte *cp, c;
+  int width;
+      
+  if (NILP (Vfloat_output_format)
+      || !STRINGP (Vfloat_output_format))
+  lose:
+    sprintf (buf, "%.16g", data);
+  else			/* oink oink */
+    {
+      /* Check that the spec we have is fully valid.
+	 This means not only valid for printf,
+	 but meant for floats, and reasonable.  */
+      cp = string_data (XSTRING (Vfloat_output_format));
+
+      if (cp[0] != '%')
+	goto lose;
+      if (cp[1] != '.')
+	goto lose;
+
+      cp += 2;
+      for (width = 0; (c = *cp, isdigit (c)); cp++)
+	{
+	  width *= 10;
+	  width += c - '0';
+	}
+
+      if (*cp != 'e' && *cp != 'f' && *cp != 'g' && *cp != 'E' && *cp != 'G') 
+	goto lose;
+
+      if (width < (int) (*cp != 'e' && *cp != 'E') || width > DBL_DIG)
+	goto lose;
+
+      if (cp[1] != 0)
+	goto lose;
+
+      sprintf (buf, (char *) string_data (XSTRING (Vfloat_output_format)),
+	       data);
+    }
+
+  /* added by jwz: don't allow "1.0" to print as "1"; that destroys
+     the read-equivalence of lisp objects.  (* x 1) and (* x 1.0) do
+     not do the same thing, so it's important that the printed
+     representation of that form not be corrupted by the printer.
+   */
+  {
+    Bufbyte *s = (Bufbyte *) buf; /* don't use signed chars here!
+				     isdigit() can't hack them! */
+    if (*s == '-') s++;
+    for (; *s; s++)
+      /* if there's a non-digit, then there is a decimal point, or
+	 it's in exponential notation, both of which are ok. */
+      if (!isdigit (*s))
+	goto DONE_LABEL;
+    /* otherwise, we need to hack it. */
+    *s++ = '.';
+    *s++ = '0';
+    *s = 0;
+  }
+ DONE_LABEL:
+
+  /* Some machines print "0.4" as ".4".  I don't like that. */
+  if (buf [0] == '.' || (buf [0] == '-' && buf [1] == '.'))
+    {
+      int i;
+      for (i = strlen (buf) + 1; i >= 0; i--)
+	buf [i+1] = buf [i];
+      buf [(buf [0] == '-' ? 1 : 0)] = '0';
+    }
+}
+#endif /* LISP_FLOAT_TYPE */
+
+static void
+print_vector_internal (CONST char *start, CONST char *end,
+                       Lisp_Object obj, 
+                       Lisp_Object printcharfun, int escapeflag)
+{
+  /* This function can GC */
+  int i;
+  int len = vector_length (XVECTOR (obj));
+  int last = len;
+  struct gcpro gcpro1, gcpro2;
+  GCPRO2 (obj, printcharfun);
+
+  if (INTP (Vprint_length))
+    {
+      int max = XINT (Vprint_length);
+      if (max < len) last = max;
+    }
+
+  write_c_string (start, printcharfun);
+  for (i = 0; i < last; i++)
+    {
+      Lisp_Object elt = vector_data (XVECTOR (obj))[i];
+      if (i != 0) write_char_internal (" ", printcharfun);
+      print_internal (elt, printcharfun, escapeflag);
+    }
+  UNGCPRO;
+  if (last != len)
+    write_c_string (" ...", printcharfun);
+  write_c_string (end, printcharfun);
+}
+
+static void
+default_object_printer (Lisp_Object obj, Lisp_Object printcharfun,
+			int escapeflag)
+{
+  struct lcrecord_header *header =
+    (struct lcrecord_header *) XPNTR (obj);
+  char buf[200];
+
+  if (print_readably)
+    error ("printing unreadable object #<%s 0x%x>",
+	   header->lheader.implementation->name, header->uid);
+
+  sprintf (buf, "#<%s 0x%x>", header->lheader.implementation->name,
+	   header->uid);
+  write_c_string (buf, printcharfun);
+}
+
+void
+internal_object_printer (Lisp_Object obj, Lisp_Object printcharfun,
+			 int escapeflag)
+{
+  char buf[200];
+  sprintf (buf, "#<INTERNAL OBJECT (XEmacs bug?) (%s) 0x%x>",
+	   XRECORD_LHEADER (obj)->implementation->name,
+	   (EMACS_INT) XPNTR (obj));
+  write_c_string (buf, printcharfun);
+}
+
+void
+print_internal (Lisp_Object obj, Lisp_Object printcharfun, int escapeflag)
+{
+  /* This function can GC */
+  char buf[256];
+
+  QUIT;
+
+  /* Emacs won't print whilst GCing, but an external debugger might */
+  if (gc_in_progress) return;
+
+#ifdef I18N3
+  /* #### Both input and output streams should have a flag associated
+     with them indicating whether output to that stream, or strings
+     read from the stream, get translated using Fgettext().  Such a
+     stream is called a "translating stream".  For the minibuffer and
+     external-debugging-output this is always true on output, and
+     with-output-to-temp-buffer sets the flag to true for the buffer
+     it creates.  This flag should also be user-settable.  Perhaps it
+     should be split up into two flags, one for input and one for
+     output. */
+#endif
+
+  print_depth++;
+
+  if (print_depth > 200)
+    error ("Apparently circular structure being printed");
+
+  switch (XTYPE (obj))
+    {
+    case Lisp_Int:
+      {
+	sprintf (buf, "%d", XINT (obj));
+	write_c_string (buf, printcharfun);
+	break;
+      }
+
+    case Lisp_String:
+      {
+	Bytecount size = string_length (XSTRING (obj));
+	struct gcpro gcpro1, gcpro2;
+	int max = size;
+	GCPRO2 (obj, printcharfun);
+
+	if (INTP (Vprint_string_length) &&
+	    XINT (Vprint_string_length) < max)
+	  max = XINT (Vprint_string_length);
+	if (max < 0)
+	  max = 0;
+
+	/* !!#### This handles MAX incorrectly for Mule. */
+	if (!escapeflag)
+	  {
+	    /* This deals with GC-relocation */
+	    output_string (printcharfun, 0, obj, 0, max);
+	    if (max < size)
+	      write_c_string (" ...", printcharfun);
+	  }
+	else
+	  {
+	    Bytecount i;
+	    struct Lisp_String *s = XSTRING (obj);
+	    Bytecount last = 0;
+
+	    write_char_internal ("\"", printcharfun);
+	    for (i = 0; i < max; i++)
+	      {
+		Bufbyte ch = string_byte (s, i);
+		if (ch == '\"' || ch == '\\' 
+		    || (ch == '\n' && print_escape_newlines))
+		  {
+		    if (i > last)
+		      {
+			output_string (printcharfun, 0, obj, last,
+				       i - last);
+		      }
+		    if (ch == '\n')
+		      {
+			write_c_string ("\\n", printcharfun);
+		      }
+		    else
+		      {
+			write_char_internal ("\\", printcharfun);
+			/* This is correct for Mule because the
+			   character is either \ or " */
+			write_char_internal ((char *) (string_data (s) + i),
+					     printcharfun);
+		      }
+		    last = i + 1;
+		  }
+	      }
+	    if (max > last)
+	      {
+		output_string (printcharfun, 0, obj, last,
+			       max - last);
+	      }
+	    if (max < size)
+	      write_c_string (" ...", printcharfun);
+	    write_char_internal ("\"", printcharfun);
+	  }
+	UNGCPRO;
+	break;
+      }
+
+    case Lisp_Cons:
+      {
+	struct gcpro gcpro1, gcpro2;
+
+	/* If deeper than spec'd depth, print placeholder.  */
+	if (INTP (Vprint_level)
+	    && print_depth > XINT (Vprint_level))
+	  {
+	    write_c_string ("...", printcharfun);
+	    break;
+	  }
+
+	/* If print_readably is on, print (quote -foo-) as '-foo-
+	   (Yeah, this should really be what print-pretty does, but we
+	   don't have the rest of a pretty printer, and this actually
+	   has non-negligible impact on size/speed of .elc files.)
+	 */
+	if (print_readably &&
+	    EQ (XCAR (obj), Qquote) &&
+	    CONSP (XCDR (obj)) &&
+	    NILP (XCDR (XCDR (obj))))
+	  {
+	    obj = XCAR (XCDR (obj));
+	    GCPRO2 (obj, printcharfun);
+	    write_char_internal ("'", printcharfun);
+	    UNGCPRO;
+	    print_internal (obj, printcharfun, escapeflag);
+	    break;
+	  }
+
+	GCPRO2 (obj, printcharfun);
+	write_char_internal ("(", printcharfun);
+	{
+	  int i = 0;
+	  int max = 0;
+
+	  if (INTP (Vprint_length))
+	    max = XINT (Vprint_length);
+	  while (CONSP (obj))
+	    {
+	      if (i++)
+		write_char_internal (" ", printcharfun);
+	      if (max && i > max)
+		{
+		  write_c_string ("...", printcharfun);
+		  break;
+		}
+	      print_internal (Fcar (obj), printcharfun,
+			      escapeflag);
+	      obj = Fcdr (obj);
+	    }
+	}
+	if (!NILP (obj) && !CONSP (obj))
+	  {
+	    write_c_string (" . ", printcharfun);
+	    print_internal (obj, printcharfun, escapeflag);
+	  }
+	UNGCPRO;
+	write_char_internal (")", printcharfun);
+	break;
+      }
+
+#ifndef LRECORD_VECTOR
+    case Lisp_Vector:
+      {
+	/* If deeper than spec'd depth, print placeholder.  */
+	if (INTP (Vprint_level)
+	    && print_depth > XINT (Vprint_level))
+	  {
+	    write_c_string ("...", printcharfun);
+	    break;
+	  }
+
+	/* God intended that this be #(...), you know. */
+	print_vector_internal ("[", "]", obj, printcharfun, escapeflag);
+	break;
+      }
+#endif /* !LRECORD_VECTOR */
+
+#ifndef LRECORD_SYMBOL
+    case Lisp_Symbol:
+      {
+        print_symbol (obj, printcharfun, escapeflag);
+        break;
+      }
+#endif /* !LRECORD_SYMBOL */
+
+    case Lisp_Record:
+      {
+	struct lrecord_header *lheader = XRECORD_LHEADER (obj);
+	struct gcpro gcpro1, gcpro2;
+
+	GCPRO2 (obj, printcharfun);
+	if (lheader->implementation->printer)
+	  ((lheader->implementation->printer)
+	   (obj, printcharfun, escapeflag));
+	else
+	  default_object_printer (obj, printcharfun, escapeflag);
+	UNGCPRO;
+	break;
+      }
+
+    default:
+      {
+	/* We're in trouble if this happens!
+	   Probably should just abort () */
+	if (print_readably)
+	  error ("printing illegal data type #o%03o",
+		 (int) XTYPE (obj));
+	write_c_string ("#<EMACS BUG: ILLEGAL DATATYPE ",
+			printcharfun);
+	sprintf (buf, "(#o%3o)", (int) XTYPE (obj));
+	write_c_string (buf, printcharfun);
+	write_c_string
+	  (" Save your buffers immediately and please report this bug>",
+	   printcharfun);
+	break;
+      }
+    }
+
+  print_depth--;
+}
+
+static void
+print_compiled_function_internal (CONST char *start, CONST char *end,
+				  Lisp_Object obj, 
+				  Lisp_Object printcharfun, int escapeflag)
+{
+  /* This function can GC */
+  struct Lisp_Compiled_Function *b =
+    XCOMPILED_FUNCTION (obj); /* GC doesn't relocate */
+  int docp = b->flags.documentationp;
+  int intp = b->flags.interactivep;
+  struct gcpro gcpro1, gcpro2;
+  char buf[100];
+  GCPRO2 (obj, printcharfun);
+
+  write_c_string (start, printcharfun);
+#ifdef COMPILED_FUNCTION_ANNOTATION_HACK
+  if (!print_readably)
+    {
+      Lisp_Object ann = compiled_function_annotation (b);
+      if (!NILP (ann))
+	{
+	  write_c_string ("(from ", printcharfun);
+	  print_internal (ann, printcharfun, 1);
+	  write_c_string (") ", printcharfun);
+	}
+    }
+#endif /* COMPILED_FUNCTION_ANNOTATION_HACK */
+  /* COMPILED_ARGLIST = 0 */
+  print_internal (b->arglist, printcharfun, escapeflag);
+  /* COMPILED_BYTECODE = 1 */
+  write_char_internal (" ", printcharfun);
+  /* we don't really want to see that junk in the bytecode instructions. */
+  if (STRINGP (b->bytecodes) && !print_readably)
+    {
+      sprintf (buf, "\"...(%ld)\"", string_length (XSTRING (b->bytecodes)));
+      write_c_string (buf, printcharfun);
+    }
+  else
+    print_internal (b->bytecodes, printcharfun, escapeflag);
+  /* COMPILED_CONSTANTS = 2 */
+  write_char_internal (" ", printcharfun);
+  print_internal (b->constants, printcharfun, escapeflag);
+  /* COMPILED_STACK_DEPTH = 3 */
+  sprintf (buf, " %d", b->maxdepth);
+  write_c_string (buf, printcharfun);
+  /* COMPILED_DOC_STRING = 4 */
+  if (docp || intp)
+    {
+      write_char_internal (" ", printcharfun);
+      print_internal (compiled_function_documentation (b), printcharfun,
+		      escapeflag);
+    }
+  /* COMPILED_INTERACTIVE = 5 */
+  if (intp)
+    {
+      write_char_internal (" ", printcharfun);
+      print_internal (compiled_function_interactive (b), printcharfun,
+		      escapeflag);
+    }
+  UNGCPRO;
+  write_c_string (end, printcharfun);
+}
+
+void
+print_compiled_function (Lisp_Object obj, Lisp_Object printcharfun,
+			 int escapeflag)
+{
+  /* This function can GC */
+  print_compiled_function_internal (((print_readably) ? "#[" :
+				     "#<compiled-function "),
+				    ((print_readably) ? "]" : ">"),
+				    obj, printcharfun, escapeflag);
+}
+
+#ifdef LISP_FLOAT_TYPE
+void
+print_float (Lisp_Object obj, Lisp_Object printcharfun, int escapeflag)
+{
+  char pigbuf[350];	/* see comments in float_to_string */
+
+  float_to_string (pigbuf, float_data (XFLOAT (obj)));
+  write_c_string (pigbuf, printcharfun);
+}
+#endif /* LISP_FLOAT_TYPE */
+
+void
+print_symbol (Lisp_Object obj, Lisp_Object printcharfun, int escapeflag)
+{
+  /* This function can GC */
+  /* #### Bug!! (intern "") isn't printed in some distinguished way */
+  /* ####  (the reader also loses on it) */
+  struct Lisp_String *name = XSYMBOL (obj)->name;
+  Bytecount size = string_length (name);
+  struct gcpro gcpro1, gcpro2;
+
+  if (!escapeflag)
+    {
+      /* This deals with GC-relocation */
+      Lisp_Object nameobj;
+      XSETSTRING (nameobj, name);
+      output_string (printcharfun, 0, nameobj, 0, size);
+      return;
+    }
+  GCPRO2 (obj, printcharfun);
+
+  if (print_gensym) 
+    {
+      Lisp_Object tem = oblookup (Vobarray, string_data (name), size);
+      if (!EQ (tem, obj))
+	/* (read) would return a new symbol with the same name.
+	   This isn't quite correct, because that symbol might not
+	   really be uninterned (it might be interned in some other
+	   obarray) but there's no way to win in that case without
+	   implementing a real package system.
+	   */
+	write_c_string ("#:", printcharfun);
+    }
+
+  /* Does it look like an integer or a float? */
+  {
+    Bufbyte *data = string_data (name);
+    Bytecount confusing = 0;
+
+    if (size == 0)
+      goto not_yet_confused;    /* Really confusing */
+    else if (isdigit (data[0]))
+      confusing = 0;
+    else if (size == 1)
+      goto not_yet_confused;
+    else if (data[0] == '-' || data[0] == '+')
+      confusing = 1;
+    else
+      goto not_yet_confused;
+
+    for (; confusing < size; confusing++)
+      { 
+        if (!isdigit (data[confusing]))
+          {
+            confusing = 0;
+            break;
+          }
+      }
+  not_yet_confused:
+
+#ifdef LISP_FLOAT_TYPE
+    if (!confusing)
+      confusing = isfloat_string ((char *) data);
+#endif
+    if (confusing)
+      write_char_internal ("\\", printcharfun);
+  }
+
+  {
+    Lisp_Object nameobj;
+    Bytecount i;
+    Bytecount last = 0;
+        
+    XSETSTRING (nameobj, name);
+    for (i = 0; i < size; i++)
+      {
+	Bufbyte c = string_byte (name, i);
+
+	if (c == '\"' || c == '\\' || c == '\'' || c == ';' || c == '#' ||
+	    c == '(' || c == ')' || c == ',' || c =='.' || c == '`' ||
+	    c == '[' || c == ']' || c == '?' || c <= 040)
+	  {
+	    if (i > last)
+	      {
+		output_string (printcharfun, 0, nameobj, last,
+			       i - last);
+	      }
+	    write_char_internal ("\\", printcharfun);
+	    last = i;
+	  }
+      }
+    output_string (printcharfun, 0, nameobj, last, size - last);
+  }
+  UNGCPRO;
+}
+
+
+int alternate_do_pointer;
+char alternate_do_string[5000];
+
+DEFUN ("alternate-debugging-output", Falternate_debugging_output,
+       Salternate_debugging_output, 1, 1, 0 /*
+Append CHARACTER to the array `alternate_do_string'.
+This can be used in place of `external-debugging-output' as a function
+to be passed to `print'.  Before calling `print', set `alternate_do_pointer'
+to 0.
+
+*/ )
+  (character)
+     Lisp_Object character;
+{
+  Bufbyte str[MAX_EMCHAR_LEN];
+  Bytecount len;
+  int extlen;
+  CONST Extbyte *extptr;
+
+  CHECK_CHAR_COERCE_INT (character);
+  len = set_charptr_emchar (str, XCHAR (character));
+  GET_CHARPTR_EXT_DATA_ALLOCA (str, len, FORMAT_DISPLAY, extptr, extlen);
+  memcpy (alternate_do_string + alternate_do_pointer, extptr, extlen);
+  alternate_do_pointer += extlen;
+  alternate_do_string[alternate_do_pointer] = 0;
+  return character;
+}
+
+DEFUN ("external-debugging-output", Fexternal_debugging_output,
+       Sexternal_debugging_output, 1, 3, 0 /*
+Write CHAR-OR-STRING to stderr or stdout.
+If optional arg STDOUT-P is non-nil, write to stdout; otherwise, write
+to stderr.  You can use this function to write directly to the terminal.
+This function can be used as the STREAM argument of Fprint() or the like.
+
+If you have opened a termscript file (using `open-termscript'), then
+the output also will be logged to this file.
+*/ )
+  (char_or_string, stdout_p, device)
+     Lisp_Object char_or_string, stdout_p, device;
+{
+  FILE *file = 0;
+  struct console *con = 0;
+
+  if (NILP (device))
+    {
+      if (!NILP (stdout_p))
+	file = stdout;
+      else
+	file = stderr;
+    }
+  else
+    {
+      CHECK_LIVE_DEVICE (device);
+      if (!DEVICE_TTY_P (XDEVICE (device)) &&
+	  !DEVICE_STREAM_P (XDEVICE (device)))
+	signal_simple_error ("Must be tty or stream device", device);
+      con = XCONSOLE (DEVICE_CONSOLE (XDEVICE (device)));
+      if (DEVICE_TTY_P (XDEVICE (device)))
+	file = 0;
+      else if (!NILP (stdout_p))
+	file = CONSOLE_STREAM_DATA (con)->outfd;
+      else
+	file = CONSOLE_STREAM_DATA (con)->errfd;
+    }
+
+  if (STRINGP (char_or_string))
+    write_string_to_stdio_stream (file, con,
+				  string_data (XSTRING (char_or_string)),
+				  0, string_length (XSTRING (char_or_string)),
+				  FORMAT_DISPLAY);
+  else
+    {
+      Bufbyte str[MAX_EMCHAR_LEN];
+      Bytecount len;
+
+      CHECK_CHAR_COERCE_INT (char_or_string);
+      len = set_charptr_emchar (str, XCHAR (char_or_string));
+      write_string_to_stdio_stream (file, con, str, 0, len, FORMAT_DISPLAY);
+    }
+
+  return char_or_string;
+}
+
+DEFUN ("open-termscript", Fopen_termscript, Sopen_termscript,
+  1, 1, "FOpen termscript file: " /*
+Start writing all terminal output to FILE as well as the terminal.
+FILE = nil means just close any termscript file currently open.
+*/ )
+  (file)
+     Lisp_Object file;
+{
+  /* This function can GC */
+  if (termscript != 0)
+    fclose (termscript);
+  termscript = 0;
+
+  if (! NILP (file))
+    {
+      file = Fexpand_file_name (file, Qnil);
+      termscript = fopen ((char *) string_data (XSTRING (file)), "w");
+      if (termscript == 0)
+	report_file_error ("Opening termscript", Fcons (file, Qnil));
+    }
+  return Qnil;
+}
+
+#if 1
+/* Debugging kludge -- unbuffered */
+static int debug_print_length = 50;
+static int debug_print_level = 15;
+Lisp_Object debug_temp;
+void debug_print_no_newline (Lisp_Object debug_print_obj);
+void
+debug_print_no_newline (Lisp_Object debug_print_obj)
+{
+  /* This function can GC */
+  int old_print_readably = print_readably;
+  int old_print_depth = print_depth;
+  Lisp_Object old_print_length = Vprint_length;
+  Lisp_Object old_print_level = Vprint_level;
+  Lisp_Object old_inhibit_quit = Vinhibit_quit;
+  struct gcpro gcpro1, gcpro2, gcpro3;
+  GCPRO3 (old_print_level, old_print_length, old_inhibit_quit);
+
+  if (gc_in_progress)
+    stderr_out ("** gc-in-progress!  Bad idea to print anything! **\n");
+
+  print_depth = 0;
+  print_readably = 0;
+  print_unbuffered++;
+  /* Could use unwind-protect, but why bother? */
+  if (debug_print_length > 0)
+    Vprint_length = make_int (debug_print_length);
+  if (debug_print_level > 0)
+    Vprint_level = make_int (debug_print_level);
+  print_internal (debug_print_obj, Qexternal_debugging_output, 1);
+  Vinhibit_quit = old_inhibit_quit;
+  Vprint_level = old_print_level;
+  Vprint_length = old_print_length;
+  print_depth = old_print_depth;
+  print_readably = old_print_readably;
+  print_unbuffered--;
+  UNGCPRO;
+}
+
+void debug_print (Lisp_Object debug_print_obj);
+void
+debug_print (Lisp_Object debug_print_obj)
+{
+  debug_print_no_newline (debug_print_obj);
+  stderr_out ("\n");
+  fflush (stderr);
+}
+
+/* Debugging kludge -- unbuffered */
+void
+debug_backtrace (void)
+{
+  /* This function can GC */
+  int old_print_readably = print_readably;
+  int old_print_depth = print_depth;
+  Lisp_Object old_print_length = Vprint_length;
+  Lisp_Object old_print_level = Vprint_level;
+  Lisp_Object old_inhibit_quit = Vinhibit_quit;
+  struct gcpro gcpro1, gcpro2, gcpro3;
+  GCPRO3 (old_print_level, old_print_length, old_inhibit_quit);
+
+  if (gc_in_progress)
+    stderr_out ("** gc-in-progress!  Bad idea to print anything! **\n");
+
+  print_depth = 0;
+  print_readably = 0;
+  print_unbuffered++;
+  /* Could use unwind-protect, but why bother? */
+  if (debug_print_length > 0)
+    Vprint_length = make_int (debug_print_length);
+  if (debug_print_level > 0)
+    Vprint_level = make_int (debug_print_level);
+  Fbacktrace (Qexternal_debugging_output, Qt);
+  stderr_out ("\n");
+  fflush (stderr);
+  Vinhibit_quit = old_inhibit_quit;
+  Vprint_level = old_print_level;
+  Vprint_length = old_print_length;
+  print_depth = old_print_depth;
+  print_readably = old_print_readably;
+  print_unbuffered--;
+  UNGCPRO;
+}
+
+void
+debug_short_backtrace (int length)
+{
+  int first = 1;
+  struct backtrace *bt = backtrace_list;
+  stderr_out ("   [");
+  fflush (stderr);
+  while (length > 0 && bt)
+    {
+      if (!first)
+	{
+	  stderr_out (", ");
+	  fflush (stderr);
+	}
+      if (COMPILED_FUNCTIONP (*bt->function))
+	{
+	  Lisp_Object ann = Fcompiled_function_annotation (*bt->function);
+	  if (!NILP (ann))
+	    {
+	      stderr_out ("<compiled-function from ");
+	      fflush (stderr);
+	      debug_print_no_newline (ann);
+	      stderr_out (">");
+	      fflush (stderr);
+	    }
+	  else
+	    {
+	      stderr_out ("<compiled-function of unknown origin>");
+	      fflush (stderr);
+	    }
+	}
+      else
+	debug_print_no_newline (*bt->function);
+      first = 0;
+      length--;
+      bt = bt->next;
+    }
+  stderr_out ("]\n");
+  fflush (stderr);
+}
+
+#endif /* debugging kludge */
+
+
+void
+syms_of_print (void)
+{
+  defsymbol (&Qprint_escape_newlines, "print-escape-newlines");
+  defsymbol (&Qprint_readably, "print-readably");
+
+  defsymbol (&Qstandard_output, "standard-output");
+
+#ifdef LISP_FLOAT_TYPE
+  defsymbol (&Qfloat_output_format, "float-output-format");
+#endif
+
+  defsymbol (&Qprint_length, "print-length");
+
+  defsymbol (&Qprint_string_length, "print-string-length");
+  defsubr (&Sprin1);
+  defsubr (&Sprin1_to_string);
+  defsubr (&Sprinc);
+  defsubr (&Sprint);
+  defsubr (&Sterpri);
+  defsubr (&Swrite_char);
+  defsubr (&Salternate_debugging_output);
+  defsymbol (&Qalternate_debugging_output, "alternate-debugging-output");
+  defsubr (&Sexternal_debugging_output);
+  defsubr (&Sopen_termscript);
+  defsymbol (&Qexternal_debugging_output, "external-debugging-output");
+#ifndef standalone
+  defsubr (&Swith_output_to_temp_buffer);
+#endif /* not standalone */
+}
+
+void
+lstream_type_create_print (void)
+{
+  LSTREAM_HAS_METHOD (print, writer);
+  LSTREAM_HAS_METHOD (print, marker);
+}
+
+void
+vars_of_print (void)
+{
+  alternate_do_pointer = 0;
+
+  DEFVAR_LISP ("standard-output", &Vstandard_output /*
+Output stream `print' uses by default for outputting a character.
+This may be any function of one argument.
+It may also be a buffer (output is inserted before point)
+or a marker (output is inserted and the marker is advanced)
+or the symbol t (output appears in the minibuffer line).
+*/ );
+  Vstandard_output = Qt;
+
+#ifdef LISP_FLOAT_TYPE
+  DEFVAR_LISP ("float-output-format", &Vfloat_output_format /*
+The format descriptor string that lisp uses to print floats.
+This is a %-spec like those accepted by `printf' in C,
+but with some restrictions.  It must start with the two characters `%.'.
+After that comes an integer precision specification,
+and then a letter which controls the format.
+The letters allowed are `e', `f' and `g'.
+Use `e' for exponential notation \"DIG.DIGITSeEXPT\"
+Use `f' for decimal point notation \"DIGITS.DIGITS\".
+Use `g' to choose the shorter of those two formats for the number at hand.
+The precision in any of these cases is the number of digits following
+the decimal point.  With `f', a precision of 0 means to omit the
+decimal point.  0 is not allowed with `f' or `g'.
+
+A value of nil means to use `%.16g'.
+
+Regardless of the value of `float-output-format', a floating point number
+will never be printed in such a way that it is ambiguous with an integer;
+that is, a floating-point number will always be printed with a decimal
+point and/or an exponent, even if the digits following the decimal point
+are all zero.  This is to preserve read-equivalence.
+*/ );
+  Vfloat_output_format = Qnil;
+#endif /* LISP_FLOAT_TYPE */
+
+  DEFVAR_LISP ("print-length", &Vprint_length /*
+Maximum length of list or vector to print before abbreviating.
+A value of nil means no limit.
+*/ );
+  Vprint_length = Qnil;
+
+  DEFVAR_LISP ("print-string-length", &Vprint_string_length /*
+Maximum length of string to print before abbreviating.
+A value of nil means no limit.
+*/ );
+  Vprint_string_length = Qnil;
+
+  DEFVAR_LISP ("print-level", &Vprint_level /*
+Maximum depth of list nesting to print before abbreviating.
+A value of nil means no limit.
+*/ );
+  Vprint_level = Qnil;
+
+  DEFVAR_BOOL ("print-escape-newlines", &print_escape_newlines /*
+Non-nil means print newlines in strings as backslash-n.
+*/ );
+  print_escape_newlines = 0;
+
+  DEFVAR_BOOL ("print-readably", &print_readably /*
+If non-nil, then all objects will be printed in a readable form.
+If an object has no readable representation, then an error is signalled.
+When print-readably is true, compiled-function objects will be written in
+ #[...] form instead of in #<compiled-function [...]> form, and two-element
+ lists of the form (quote object) will be written as the equivalent 'object.
+Do not SET this variable; bind it instead.
+*/ );
+  print_readably = 0;
+
+  DEFVAR_BOOL ("print-gensym", &print_gensym /*
+If non-nil, then uninterned symbols will be printed specially.
+Uninterned symbols are those which are not present in `obarray', that is,
+those which were made with `make-symbol' or by calling `intern' with a
+second argument.
+
+When print-gensym is true, such symbols will be preceeded by \"#:\", which
+causes the reader to create a new symbol instead of interning and returning
+an existing one.  Beware: the #: syntax creates a new symbol each time it is
+seen, so if you print an object which contains two pointers to the same
+uninterned symbol, `read' will not duplicate that structure.
+
+Also, since XEmacs has no real notion of packages, there is no way for the
+printer to distinguish between symbols interned in no obarray, and symbols
+interned in an alternate obarray.
+*/ );
+  print_gensym = 0;
+
+  DEFVAR_LISP ("print-message-label", &Vprint_message_label /*
+Label for minibuffer messages created with `print'.  This should
+generally be bound with `let' rather than set.  (See `display-message'.)
+*/ );
+  Vprint_message_label = Qprint;
+
+  /* prin1_to_string_buffer initialized in init_buffer_once in buffer.c */
+  staticpro (&Vprin1_to_string_buffer);
+}