/* Lisp object printing and output streams.
- Copyright (C) 1985, 86, 88, 93, 94, 95, 97, 1998
+ Copyright (C) 1985, 86, 88, 93, 94, 95, 97, 98, 1999, 2000, 2001
Free Software Foundation, Inc.
This file is part of GNU Emacs.
#include "lisp.h"
#include "buffer.h"
#include "charset.h"
+#include "keyboard.h"
#include "frame.h"
#include "window.h"
#include "process.h"
#include "dispextern.h"
#include "termchar.h"
-#include "keyboard.h"
-
-#ifdef USE_TEXT_PROPERTIES
#include "intervals.h"
-#endif
Lisp_Object Vstandard_output, Qstandard_output;
/* These are used to print like we read. */
extern Lisp_Object Qbackquote, Qcomma, Qcomma_at, Qcomma_dot, Qfunction;
-#ifdef LISP_FLOAT_TYPE
Lisp_Object Vfloat_output_format, Qfloat_output_format;
/* Work around a problem that happens because math.h on hpux 7
#if STDC_HEADERS
#include <float.h>
-#include <stdlib.h>
#endif
/* Default to values appropriate for IEEE floating point. */
#define DOUBLE_DIGITS_BOUND ((int) ceil (log10 (pow (FLT_RADIX, DBL_MANT_DIG))))
#endif
-#endif /* LISP_FLOAT_TYPE */
-
/* Avoid actual stack overflow in print. */
int print_depth;
+/* Nonzero if inside outputting backquote in old style. */
+int old_backquote_output;
+
/* Detect most circularities to print finite output. */
#define PRINT_CIRCLE 200
Lisp_Object being_printed[PRINT_CIRCLE];
and must start with PRINTPREPARE, end with PRINTFINISH,
and use PRINTDECLARE to declare common variables.
Use PRINTCHAR to output one character,
- or call strout to output a block of characters. */
+ or call strout to output a block of characters. */
#define PRINTDECLARE \
struct buffer *old = current_buffer; \
- int old_point = -1, start_point; \
- int old_point_byte, start_point_byte; \
- int specpdl_count = specpdl_ptr - specpdl; \
+ int old_point = -1, start_point = -1; \
+ int old_point_byte = -1, start_point_byte = -1; \
+ int specpdl_count = SPECPDL_INDEX (); \
int free_print_buffer = 0; \
int multibyte = !NILP (current_buffer->enable_multibyte_characters); \
Lisp_Object original
print_buffer_pos = 0; \
print_buffer_pos_byte = 0; \
} \
- if (EQ (printcharfun, Qt)) \
+ if (EQ (printcharfun, Qt) && ! noninteractive) \
setup_echo_area_for_printing (multibyte);
#define PRINTFINISH \
#define PRINTCHAR(ch) printchar (ch, printcharfun)
-/* Nonzero if there is no room to print any more characters
- so print might as well return right away. */
-
-#define PRINTFULLP() \
- (EQ (printcharfun, Qt) && !noninteractive \
- && printbufidx >= FRAME_WIDTH (XFRAME (WINDOW_FRAME (XWINDOW (minibuf_window)))))
-
/* This is used to restore the saved contents of print_buffer
when there is a recursive call to print. */
print_unwind (saved_text)
Lisp_Object saved_text;
{
- bcopy (XSTRING (saved_text)->data, print_buffer, XSTRING (saved_text)->size);
+ bcopy (SDATA (saved_text), print_buffer, SCHARS (saved_text));
+ return Qnil;
}
call1 (fun, make_number (ch));
else
{
- unsigned char work[4], *str;
- int len = CHAR_STRING (ch, work, str);
-
+ unsigned char str[MAX_MULTIBYTE_LENGTH];
+ int len = CHAR_STRING (ch, str);
+
QUIT;
-
+
if (NILP (fun))
{
if (print_buffer_pos_byte + len >= print_buffer_size)
{
int multibyte_p
= !NILP (current_buffer->enable_multibyte_characters);
-
- if (!message_buf_print)
- setup_echo_area_for_printing (multibyte_p);
+ setup_echo_area_for_printing (multibyte_p);
insert_char (ch);
message_dolog (str, len, 0, multibyte_p);
}
print_chars += size;
#endif /* MAX_PRINT_CHARS */
}
- else if (noninteractive)
+ else if (noninteractive && EQ (printcharfun, Qt))
{
fwrite (ptr, 1, size_byte, stdout);
noninteractive_need_newline = 1;
int i;
int multibyte_p
= !NILP (current_buffer->enable_multibyte_characters);
-
- if (!message_buf_print)
- setup_echo_area_for_printing (multibyte_p);
-
+
+ setup_echo_area_for_printing (multibyte_p);
message_dolog (ptr, size_byte, 0, multibyte_p);
-
+
if (size == size_byte)
{
for (i = 0; i < size; ++i)
- insert_char (*ptr++);
+ insert_char ((unsigned char )*ptr++);
}
else
{
insert_char (ch);
}
}
-
+
#ifdef MAX_PRINT_CHARS
if (max_print)
print_chars += size;
int chars;
if (STRING_MULTIBYTE (string))
- chars = XSTRING (string)->size;
+ chars = SCHARS (string);
else if (EQ (printcharfun, Qt)
? ! NILP (buffer_defaults.enable_multibyte_characters)
: ! NILP (current_buffer->enable_multibyte_characters))
- chars = multibyte_chars_in_text (XSTRING (string)->data,
- STRING_BYTES (XSTRING (string)));
+ {
+ /* If unibyte string STRING contains 8-bit codes, we must
+ convert STRING to a multibyte string containing the same
+ character codes. */
+ Lisp_Object newstr;
+ int bytes;
+
+ chars = SBYTES (string);
+ bytes = parse_str_to_multibyte (SDATA (string), chars);
+ if (chars < bytes)
+ {
+ newstr = make_uninit_multibyte_string (chars, bytes);
+ bcopy (SDATA (string), SDATA (newstr), chars);
+ str_to_multibyte (SDATA (newstr), bytes, chars);
+ string = newstr;
+ }
+ }
else
- chars = STRING_BYTES (XSTRING (string));
+ chars = SBYTES (string);
/* strout is safe for output to a frame (echo area) or to print_buffer. */
- strout (XSTRING (string)->data,
- chars, STRING_BYTES (XSTRING (string)),
+ strout (SDATA (string),
+ chars, SBYTES (string),
printcharfun, STRING_MULTIBYTE (string));
}
else
/* Otherwise, string may be relocated by printing one char.
So re-fetch the string address for each character. */
int i;
- int size = XSTRING (string)->size;
- int size_byte = STRING_BYTES (XSTRING (string));
+ int size = SCHARS (string);
+ int size_byte = SBYTES (string);
struct gcpro gcpro1;
GCPRO1 (string);
if (size == size_byte)
for (i = 0; i < size; i++)
- PRINTCHAR (XSTRING (string)->data[i]);
+ PRINTCHAR (SREF (string, i));
else
for (i = 0; i < size_byte; i++)
{
/* Here, we must convert each multi-byte form to the
corresponding character code before handing it to PRINTCHAR. */
int len;
- int ch = STRING_CHAR_AND_LENGTH (XSTRING (string)->data + i,
+ int ch = STRING_CHAR_AND_LENGTH (SDATA (string) + i,
size_byte - i, len);
if (!CHAR_VALID_P (ch, 0))
{
- ch = XSTRING (string)->data[i];
+ ch = SREF (string, i);
len = 1;
}
PRINTCHAR (ch);
}
\f
DEFUN ("write-char", Fwrite_char, Swrite_char, 1, 2, 0,
- "Output character CHARACTER to stream PRINTCHARFUN.\n\
-PRINTCHARFUN defaults to the value of `standard-output' (which see).")
- (character, printcharfun)
+ doc: /* Output character CHARACTER to stream PRINTCHARFUN.
+PRINTCHARFUN defaults to the value of `standard-output' (which see). */)
+ (character, printcharfun)
Lisp_Object character, printcharfun;
{
PRINTDECLARE;
if (NILP (printcharfun))
printcharfun = Vstandard_output;
- CHECK_NUMBER (character, 0);
+ CHECK_NUMBER (character);
PRINTPREPARE;
PRINTCHAR (XINT (character));
PRINTFINISH;
void
temp_output_buffer_setup (bufname)
- char *bufname;
+ const char *bufname;
{
- int count = specpdl_ptr - specpdl;
+ int count = SPECPDL_INDEX ();
register struct buffer *old = current_buffer;
register Lisp_Object buf;
Fset_buffer (Fget_buffer_create (build_string (bufname)));
+ Fkill_all_local_variables ();
current_buffer->directory = old->directory;
current_buffer->read_only = Qnil;
current_buffer->filename = Qnil;
Ferase_buffer ();
XSETBUFFER (buf, current_buffer);
- call1 (Vrun_hooks, Qtemp_buffer_setup_hook);
+ Frun_hooks (1, &Qtemp_buffer_setup_hook);
unbind_to (count, Qnil);
Lisp_Object
internal_with_output_to_temp_buffer (bufname, function, args)
- char *bufname;
+ const char *bufname;
Lisp_Object (*function) P_ ((Lisp_Object));
Lisp_Object args;
{
- int count = specpdl_ptr - specpdl;
+ int count = SPECPDL_INDEX ();
Lisp_Object buf, val;
struct gcpro gcpro1;
return unbind_to (count, val);
}
-DEFUN ("with-output-to-temp-buffer", Fwith_output_to_temp_buffer, Swith_output_to_temp_buffer,
+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.\n\
-The buffer is cleared out initially, and marked as unmodified when done.\n\
-All output done by BODY is inserted in that buffer by default.\n\
-The buffer is displayed in another window, but not selected.\n\
-The value of the last form in BODY is returned.\n\
-If BODY does not finish normally, the buffer BUFNAME is not displayed.\n\
-\n\
-The hook `temp-buffer-setup-hook' is run before BODY,\n\
-with the buffer BUFNAME temporarily current.\n\
-The hook `temp-buffer-show-hook' is run after the buffer is displayed,\n\
-with the buffer temporarily current, and the window that was used\n\
-to display it temporarily selected.\n\
-\n\
-If variable `temp-buffer-show-function' is non-nil, call it at the end\n\
-to get the buffer displayed instead of just displaying the non-selected\n\
-buffer and calling the hook. It gets one argument, the buffer to display.")
- (args)
+ doc: /* 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.
+
+The hook `temp-buffer-setup-hook' is run before BODY,
+with the buffer BUFNAME temporarily current.
+The hook `temp-buffer-show-hook' is run after the buffer is displayed,
+with the buffer temporarily current, and the window that was used
+to display it temporarily selected.
+
+If variable `temp-buffer-show-function' is non-nil, call it at the end
+to get the buffer displayed instead of just displaying the non-selected
+buffer and calling the hook. It gets one argument, the buffer to display.
+
+usage: (with-output-to-temp-buffer BUFFNAME BODY ...) */)
+ (args)
Lisp_Object args;
{
struct gcpro gcpro1;
Lisp_Object name;
- int count = specpdl_ptr - specpdl;
+ int count = SPECPDL_INDEX ();
Lisp_Object buf, val;
GCPRO1(args);
name = Feval (Fcar (args));
- UNGCPRO;
-
- CHECK_STRING (name, 0);
- temp_output_buffer_setup (XSTRING (name)->data);
+ CHECK_STRING (name);
+ temp_output_buffer_setup (SDATA (name));
buf = Vstandard_output;
+ UNGCPRO;
- val = Fprogn (Fcdr (args));
+ val = Fprogn (XCDR (args));
+ GCPRO1 (val);
temp_output_buffer_show (buf);
+ UNGCPRO;
return unbind_to (count, val);
}
\f
static void print ();
static void print_preprocess ();
-#ifdef USE_TEXT_PROPERTIES
static void print_preprocess_string ();
-#endif /* USE_TEXT_PROPERTIES */
static void print_object ();
DEFUN ("terpri", Fterpri, Sterpri, 0, 1, 0,
- "Output a newline to stream PRINTCHARFUN.\n\
-If PRINTCHARFUN is omitted or nil, the value of `standard-output' is used.")
+ doc: /* Output a newline to stream PRINTCHARFUN.
+If PRINTCHARFUN is omitted or nil, the value of `standard-output' is used. */)
(printcharfun)
Lisp_Object printcharfun;
{
}
DEFUN ("prin1", Fprin1, Sprin1, 1, 2, 0,
- "Output the printed representation of OBJECT, any Lisp object.\n\
-Quoting characters are printed when needed to make output that `read'\n\
-can handle, whenever this is possible.\n\
-Output stream is PRINTCHARFUN, or value of `standard-output' (which see).")
- (object, printcharfun)
+ doc: /* 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. For complex objects, the behavior
+is controlled by `print-level' and `print-length', which see.
+
+OBJECT is any of the Lisp data types: a number, a string, a symbol,
+a list, a buffer, a window, a frame, etc.
+
+A printed representation of an object is text which describes that object.
+
+Optional argument PRINTCHARFUN is the output stream, which can be one
+of these:
+
+ - a buffer, in which case output is inserted into that buffer at point;
+ - a marker, in which case output is inserted at marker's position;
+ - a function, in which case that function is called once for each
+ character of OBJECT's printed representation;
+ - a symbol, in which case that symbol's function definition is called; or
+ - t, in which case the output is displayed in the echo area.
+
+If PRINTCHARFUN is omitted, the value of `standard-output' (which see)
+is used instead. */)
+ (object, printcharfun)
Lisp_Object object, printcharfun;
{
PRINTDECLARE;
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,\n\
-any Lisp object. Quoting characters are used when needed to make output\n\
-that `read' can handle, whenever this is possible, unless the optional\n\
-second argument NOESCAPE is non-nil.")
- (object, noescape)
+ doc: /* Return a string containing the printed representation of OBJECT.
+OBJECT can be any Lisp object. This function outputs quoting characters
+when necessary to make output that `read' can handle, whenever possible,
+unless the optional second argument NOESCAPE is non-nil.
+
+OBJECT is any of the Lisp data types: a number, a string, a symbol,
+a list, a buffer, a window, a frame, etc.
+
+A printed representation of an object is text which describes that object. */)
+ (object, noescape)
Lisp_Object object, noescape;
{
PRINTDECLARE;
PRINTFINISH;
set_buffer_internal (XBUFFER (Vprin1_to_string_buffer));
object = Fbuffer_string ();
+ if (SBYTES (object) == SCHARS (object))
+ STRING_SET_UNIBYTE (object);
Ferase_buffer ();
set_buffer_internal (old);
}
DEFUN ("princ", Fprinc, Sprinc, 1, 2, 0,
- "Output the printed representation of OBJECT, any Lisp object.\n\
-No quoting characters are used; no delimiters are printed around\n\
-the contents of strings.\n\
-Output stream is PRINTCHARFUN, or value of standard-output (which see).")
- (object, printcharfun)
+ doc: /* Output the printed representation of OBJECT, any Lisp object.
+No quoting characters are used; no delimiters are printed around
+the contents of strings.
+
+OBJECT is any of the Lisp data types: a number, a string, a symbol,
+a list, a buffer, a window, a frame, etc.
+
+A printed representation of an object is text which describes that object.
+
+Optional argument PRINTCHARFUN is the output stream, which can be one
+of these:
+
+ - a buffer, in which case output is inserted into that buffer at point;
+ - a marker, in which case output is inserted at marker's position;
+ - a function, in which case that function is called once for each
+ character of OBJECT's printed representation;
+ - a symbol, in which case that symbol's function definition is called; or
+ - t, in which case the output is displayed in the echo area.
+
+If PRINTCHARFUN is omitted, the value of `standard-output' (which see)
+is used instead. */)
+ (object, printcharfun)
Lisp_Object object, printcharfun;
{
PRINTDECLARE;
}
DEFUN ("print", Fprint, Sprint, 1, 2, 0,
- "Output the printed representation of OBJECT, with newlines around it.\n\
-Quoting characters are printed when needed to make output that `read'\n\
-can handle, whenever this is possible.\n\
-Output stream is PRINTCHARFUN, or value of `standard-output' (which see).")
- (object, printcharfun)
+ doc: /* 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. For complex objects, the behavior
+is controlled by `print-level' and `print-length', which see.
+
+OBJECT is any of the Lisp data types: a number, a string, a symbol,
+a list, a buffer, a window, a frame, etc.
+
+A printed representation of an object is text which describes that object.
+
+Optional argument PRINTCHARFUN is the output stream, which can be one
+of these:
+
+ - a buffer, in which case output is inserted into that buffer at point;
+ - a marker, in which case output is inserted at marker's position;
+ - a function, in which case that function is called once for each
+ character of OBJECT's printed representation;
+ - a symbol, in which case that symbol's function definition is called; or
+ - t, in which case the output is displayed in the echo area.
+
+If PRINTCHARFUN is omitted, the value of `standard-output' (which see)
+is used instead. */)
+ (object, printcharfun)
Lisp_Object object, printcharfun;
{
PRINTDECLARE;
Lisp_Object Qexternal_debugging_output;
DEFUN ("external-debugging-output", Fexternal_debugging_output, Sexternal_debugging_output, 1, 1, 0,
- "Write CHARACTER to stderr.\n\
-You can call print while debugging emacs, and pass it this function\n\
-to make it write to the debugging output.\n")
- (character)
+ doc: /* Write CHARACTER to stderr.
+You can call print while debugging emacs, and pass it this function
+to make it write to the debugging output. */)
+ (character)
Lisp_Object character;
{
- CHECK_NUMBER (character, 0);
+ CHECK_NUMBER (character);
putc (XINT (character), stderr);
#ifdef WINDOWSNT
\f
DEFUN ("error-message-string", Ferror_message_string, Serror_message_string,
1, 1, 0,
- "Convert an error value (ERROR-SYMBOL . DATA) to an error message.")
- (obj)
+ doc: /* Convert an error value (ERROR-SYMBOL . DATA) to an error message. */)
+ (obj)
Lisp_Object obj;
{
struct buffer *old = current_buffer;
- Lisp_Object original, printcharfun, value;
+ Lisp_Object value;
struct gcpro gcpro1;
/* If OBJ is (error STRING), just return STRING.
&& NILP (XCDR (XCDR (obj))))
return XCAR (XCDR (obj));
- print_error_message (obj, Vprin1_to_string_buffer);
+ print_error_message (obj, Vprin1_to_string_buffer, 0, Qnil);
set_buffer_internal (XBUFFER (Vprin1_to_string_buffer));
value = Fbuffer_string ();
return value;
}
-/* Print an error message for the error DATA
- onto Lisp output stream STREAM (suitable for the print functions). */
+/* Print an error message for the error DATA onto Lisp output stream
+ STREAM (suitable for the print functions). */
void
-print_error_message (data, stream)
+print_error_message (data, stream, context, caller)
Lisp_Object data, stream;
+ char *context;
+ Lisp_Object caller;
{
Lisp_Object errname, errmsg, file_error, tail;
struct gcpro gcpro1;
int i;
+ if (context != 0)
+ write_string_1 (context, -1, stream);
+
+ /* If we know from where the error was signaled, show it in
+ *Messages*. */
+ if (!NILP (caller) && SYMBOLP (caller))
+ {
+ const char *name = SDATA (SYMBOL_NAME (caller));
+ message_dolog (name, strlen (name), 0, 0);
+ message_dolog (": ", 2, 0, 0);
+ }
+
errname = Fcar (data);
if (EQ (errname, Qerror))
{
data = Fcdr (data);
- if (!CONSP (data)) data = Qnil;
+ if (!CONSP (data))
+ data = Qnil;
errmsg = Fcar (data);
file_error = Qnil;
}
else
{
+ Lisp_Object error_conditions;
errmsg = Fget (errname, Qerror_message);
- file_error = Fmemq (Qfile_error,
- Fget (errname, Qerror_conditions));
+ error_conditions = Fget (errname, Qerror_conditions);
+ file_error = Fmemq (Qfile_error, error_conditions);
}
/* Print an error message including the data items. */
else
write_string_1 ("peculiar error", -1, stream);
- for (i = 0; CONSP (tail); tail = Fcdr (tail), i++)
+ for (i = 0; CONSP (tail); tail = XCDR (tail), i++)
{
+ Lisp_Object obj;
+
write_string_1 (i ? ", " : ": ", 2, stream);
- if (!NILP (file_error))
- Fprinc (Fcar (tail), stream);
+ obj = XCAR (tail);
+ if (!NILP (file_error) || EQ (errname, Qend_of_file))
+ Fprinc (obj, stream);
else
- Fprin1 (Fcar (tail), stream);
+ Fprin1 (obj, stream);
}
+
UNGCPRO;
}
-\f
-#ifdef LISP_FLOAT_TYPE
+
+\f
/*
* The buffer should be at least as large as the max string size of the
* largest float, printed in the biggest notation. This is undoubtedly
* 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)?
{
unsigned char *cp;
int width;
-
+
/* Check for plus infinity in a way that won't lose
if there is no plus infinity. */
if (data == data / 2 && data > 1.0)
/* Check for NaN in a way that won't fail if there are no NaNs. */
if (! (data * 0.0 >= 0.0))
{
+ /* Prepend "-" if the NaN's sign bit is negative.
+ The sign bit of a double is the bit that is 1 in -0.0. */
+ int i;
+ union { double d; char c[sizeof (double)]; } u_data, u_minus_zero;
+ u_data.d = data;
+ u_minus_zero.d = - 0.0;
+ for (i = 0; i < sizeof (double); i++)
+ if (u_data.c[i] & u_minus_zero.c[i])
+ {
+ *buf++ = '-';
+ break;
+ }
+
strcpy (buf, "0.0e+NaN");
return;
}
/* Check that the spec we have is fully valid.
This means not only valid for printf,
but meant for floats, and reasonable. */
- cp = XSTRING (Vfloat_output_format)->data;
+ cp = SDATA (Vfloat_output_format);
if (cp[0] != '%')
goto lose;
if (cp[1] != 0)
goto lose;
- sprintf (buf, XSTRING (Vfloat_output_format)->data, data);
+ sprintf (buf, SDATA (Vfloat_output_format), data);
}
/* Make sure there is a decimal point with digit after, or an
}
}
}
-#endif /* LISP_FLOAT_TYPE */
+
\f
static void
print (obj, printcharfun, escapeflag)
int escapeflag;
{
print_depth = 0;
+ old_backquote_output = 0;
/* Reset print_number_index and Vprint_number_table only when
the variable Vprint_continuous_numbering is nil. Otherwise,
/* Construct Vprint_number_table for print-gensym and print-circle. */
if (!NILP (Vprint_gensym) || !NILP (Vprint_circle))
{
- int i, index = 0;
- /* Construct Vprint_number_table. */
+ int i, start, index;
+ start = index = print_number_index;
+ /* Construct Vprint_number_table.
+ This increments print_number_index for the objects added. */
print_preprocess (obj);
+
/* Remove unnecessary objects, which appear only once in OBJ;
- that is, whose status is Qnil. */
- for (i = 0; i < print_number_index; i++)
+ that is, whose status is Qnil. Compactify the necessary objects. */
+ for (i = start; i < print_number_index; i++)
if (!NILP (PRINT_NUMBER_STATUS (Vprint_number_table, i)))
{
PRINT_NUMBER_OBJECT (Vprint_number_table, index)
= PRINT_NUMBER_OBJECT (Vprint_number_table, i);
- /* Reset the status field for the next print step. Now this
- field means whether the object has already been printed. */
- PRINT_NUMBER_STATUS (Vprint_number_table, index) = Qnil;
index++;
}
+
+ /* Clear out objects outside the active part of the table. */
+ for (i = index; i < print_number_index; i++)
+ PRINT_NUMBER_OBJECT (Vprint_number_table, i) = Qnil;
+
+ /* Reset the status field for the next print step. Now this
+ field means whether the object has already been printed. */
+ for (i = start; i < print_number_index; i++)
+ PRINT_NUMBER_STATUS (Vprint_number_table, i) = Qnil;
+
print_number_index = index;
}
if (STRINGP (obj) || CONSP (obj) || VECTORP (obj)
|| COMPILEDP (obj) || CHAR_TABLE_P (obj)
|| (! NILP (Vprint_gensym)
- && SYMBOLP (obj) && NILP (XSYMBOL (obj)->obarray)))
+ && SYMBOLP (obj)
+ && !SYMBOL_INTERNED_P (obj)))
{
- for (i = 0; i < print_number_index; i++)
- if (PRINT_NUMBER_OBJECT (Vprint_number_table, i) == obj)
- {
- /* OBJ appears more than once. Let's remember that. */
- PRINT_NUMBER_STATUS (Vprint_number_table, i) = Qt;
- return;
- }
-
- /* OBJ is not yet recorded. Let's add to the table. */
- if (print_number_index == 0)
+ /* In case print-circle is nil and print-gensym is t,
+ add OBJ to Vprint_number_table only when OBJ is a symbol. */
+ if (! NILP (Vprint_circle) || SYMBOLP (obj))
{
- /* Initialize the table. */
- Vprint_number_table = Fmake_vector (make_number (40), Qnil);
- }
- else if (XVECTOR (Vprint_number_table)->size == print_number_index * 2)
- {
- /* Reallocate the table. */
- int i = print_number_index * 4;
- Lisp_Object old_table = Vprint_number_table;
- Vprint_number_table = Fmake_vector (make_number (i), Qnil);
for (i = 0; i < print_number_index; i++)
+ if (EQ (PRINT_NUMBER_OBJECT (Vprint_number_table, i), obj))
+ {
+ /* OBJ appears more than once. Let's remember that. */
+ PRINT_NUMBER_STATUS (Vprint_number_table, i) = Qt;
+ return;
+ }
+
+ /* OBJ is not yet recorded. Let's add to the table. */
+ if (print_number_index == 0)
{
- PRINT_NUMBER_OBJECT (Vprint_number_table, i)
- = PRINT_NUMBER_OBJECT (old_table, i);
- PRINT_NUMBER_STATUS (Vprint_number_table, i)
- = PRINT_NUMBER_STATUS (old_table, i);
+ /* Initialize the table. */
+ Vprint_number_table = Fmake_vector (make_number (40), Qnil);
+ }
+ else if (XVECTOR (Vprint_number_table)->size == print_number_index * 2)
+ {
+ /* Reallocate the table. */
+ int i = print_number_index * 4;
+ Lisp_Object old_table = Vprint_number_table;
+ Vprint_number_table = Fmake_vector (make_number (i), Qnil);
+ for (i = 0; i < print_number_index; i++)
+ {
+ PRINT_NUMBER_OBJECT (Vprint_number_table, i)
+ = PRINT_NUMBER_OBJECT (old_table, i);
+ PRINT_NUMBER_STATUS (Vprint_number_table, i)
+ = PRINT_NUMBER_STATUS (old_table, i);
+ }
}
+ PRINT_NUMBER_OBJECT (Vprint_number_table, print_number_index) = obj;
+ /* If Vprint_continuous_numbering is non-nil and OBJ is a gensym,
+ always print the gensym with a number. This is a special for
+ the lisp function byte-compile-output-docform. */
+ if (!NILP (Vprint_continuous_numbering)
+ && SYMBOLP (obj)
+ && !SYMBOL_INTERNED_P (obj))
+ PRINT_NUMBER_STATUS (Vprint_number_table, print_number_index) = Qt;
+ print_number_index++;
}
- PRINT_NUMBER_OBJECT (Vprint_number_table, print_number_index) = obj;
- print_number_index++;
switch (XGCTYPE (obj))
{
case Lisp_String:
-#ifdef USE_TEXT_PROPERTIES
/* A string may have text properties, which can be circular. */
- traverse_intervals (XSTRING (obj)->intervals, 0, 0,
- print_preprocess_string, Qnil);
-#endif /* USE_TEXT_PROPERTIES */
+ traverse_intervals_noorder (STRING_INTERVALS (obj),
+ print_preprocess_string, Qnil);
break;
case Lisp_Cons:
size = XVECTOR (obj)->size & PSEUDOVECTOR_SIZE_MASK;
for (i = 0; i < size; i++)
print_preprocess (XVECTOR (obj)->contents[i]);
+ break;
+
+ default:
+ break;
}
}
}
-#ifdef USE_TEXT_PROPERTIES
static void
print_preprocess_string (interval, arg)
INTERVAL interval;
{
print_preprocess (interval->plist);
}
-#endif /* USE_TEXT_PROPERTIES */
static void
print_object (obj, printcharfun, escapeflag)
if (STRINGP (obj) || CONSP (obj) || VECTORP (obj)
|| COMPILEDP (obj) || CHAR_TABLE_P (obj)
|| (! NILP (Vprint_gensym)
- && SYMBOLP (obj) && NILP (XSYMBOL (obj)->obarray)))
+ && SYMBOLP (obj)
+ && !SYMBOL_INTERNED_P (obj)))
{
if (NILP (Vprint_circle) && NILP (Vprint_gensym))
{
/* With the print-circle feature. */
int i;
for (i = 0; i < print_number_index; i++)
- if (PRINT_NUMBER_OBJECT (Vprint_number_table, i) == obj)
+ if (EQ (PRINT_NUMBER_OBJECT (Vprint_number_table, i), obj))
{
if (NILP (PRINT_NUMBER_STATUS (Vprint_number_table, i)))
{
if (sizeof (int) == sizeof (EMACS_INT))
sprintf (buf, "%d", XINT (obj));
else if (sizeof (long) == sizeof (EMACS_INT))
- sprintf (buf, "%ld", XINT (obj));
+ sprintf (buf, "%ld", (long) XINT (obj));
else
abort ();
strout (buf, -1, -1, printcharfun, 0);
break;
-#ifdef LISP_FLOAT_TYPE
case Lisp_Float:
{
char pigbuf[350]; /* see comments in float_to_string */
strout (pigbuf, -1, -1, printcharfun, 0);
}
break;
-#endif
case Lisp_String:
if (!escapeflag)
else
{
register int i, i_byte;
- register unsigned char c;
struct gcpro gcpro1;
unsigned char *str;
int size_byte;
/* 1 means we must ensure that the next character we output
cannot be taken as part of a hex character escape. */
int need_nonhex = 0;
+ int multibyte = STRING_MULTIBYTE (obj);
GCPRO1 (obj);
-#ifdef USE_TEXT_PROPERTIES
- if (!NULL_INTERVAL_P (XSTRING (obj)->intervals))
+ if (!NULL_INTERVAL_P (STRING_INTERVALS (obj)))
{
PRINTCHAR ('#');
PRINTCHAR ('(');
}
-#endif
PRINTCHAR ('\"');
- str = XSTRING (obj)->data;
- size_byte = STRING_BYTES (XSTRING (obj));
+ str = SDATA (obj);
+ size_byte = SBYTES (obj);
for (i = 0, i_byte = 0; i_byte < size_byte;)
{
int len;
int c;
- if (STRING_MULTIBYTE (obj))
+ if (multibyte)
{
c = STRING_CHAR_AND_LENGTH (str + i_byte,
size_byte - i_byte, len);
PRINTCHAR ('\\');
PRINTCHAR ('f');
}
- else if (! SINGLE_BYTE_CHAR_P (c) && print_escape_multibyte)
+ else if (multibyte
+ && ! ASCII_BYTE_P (c)
+ && (SINGLE_BYTE_CHAR_P (c) || print_escape_multibyte))
{
/* When multibyte is disabled,
- print multibyte string chars using hex escapes. */
+ print multibyte string chars using hex escapes.
+ For a char code that could be in a unibyte string,
+ when found in a multibyte string, always use a hex escape
+ so it reads back as multibyte. */
unsigned char outbuf[50];
sprintf (outbuf, "\\x%x", c);
strout (outbuf, -1, -1, printcharfun, 0);
need_nonhex = 1;
}
- else if (SINGLE_BYTE_CHAR_P (c) && ! ASCII_BYTE_P (c)
+ else if (! multibyte
+ && SINGLE_BYTE_CHAR_P (c) && ! ASCII_BYTE_P (c)
&& print_escape_nonascii)
{
/* When printing in a multibyte buffer
}
PRINTCHAR ('\"');
-#ifdef USE_TEXT_PROPERTIES
- if (!NULL_INTERVAL_P (XSTRING (obj)->intervals))
+ if (!NULL_INTERVAL_P (STRING_INTERVALS (obj)))
{
- traverse_intervals (XSTRING (obj)->intervals,
- 0, 0, print_interval, printcharfun);
+ traverse_intervals (STRING_INTERVALS (obj),
+ 0, print_interval, printcharfun);
PRINTCHAR (')');
}
-#endif
UNGCPRO;
}
case Lisp_Symbol:
{
register int confusing;
- register unsigned char *p = XSYMBOL (obj)->name->data;
- register unsigned char *end = p + STRING_BYTES (XSYMBOL (obj)->name);
+ register unsigned char *p = SDATA (SYMBOL_NAME (obj));
+ register unsigned char *end = p + SBYTES (SYMBOL_NAME (obj));
register int c;
int i, i_byte, size_byte;
Lisp_Object name;
- XSETSTRING (name, XSYMBOL (obj)->name);
+ name = SYMBOL_NAME (obj);
if (p != end && (*p == '-' || *p == '+')) p++;
if (p == end)
else
confusing = 0;
- if (! NILP (Vprint_gensym) && NILP (XSYMBOL (obj)->obarray))
+ if (! NILP (Vprint_gensym) && !SYMBOL_INTERNED_P (obj))
{
PRINTCHAR ('#');
PRINTCHAR (':');
}
- size_byte = STRING_BYTES (XSTRING (name));
+ size_byte = SBYTES (name);
for (i = 0, i_byte = 0; i_byte < size_byte;)
{
/* Here, we must convert each multi-byte form to the
corresponding character code before handing it to PRINTCHAR. */
-
- if (STRING_MULTIBYTE (name))
- FETCH_STRING_CHAR_ADVANCE (c, name, i, i_byte);
- else
- c = XSTRING (name)->data[i_byte++];
-
+ FETCH_STRING_CHAR_ADVANCE (c, name, i, i_byte);
QUIT;
if (escapeflag)
print_object (XCAR (XCDR (obj)), printcharfun, escapeflag);
}
else if (print_quoted && CONSP (XCDR (obj)) && NILP (XCDR (XCDR (obj)))
+ && ! old_backquote_output
&& ((EQ (XCAR (obj), Qbackquote)
|| EQ (XCAR (obj), Qcomma)
|| EQ (XCAR (obj), Qcomma_at)
else
{
PRINTCHAR ('(');
+
+ /* If the first element is a backquote form,
+ print it old-style so it won't be misunderstood. */
+ if (print_quoted && CONSP (XCAR (obj))
+ && CONSP (XCDR (XCAR (obj)))
+ && NILP (XCDR (XCDR (XCAR (obj))))
+ && EQ (XCAR (XCAR (obj)), Qbackquote))
+ {
+ Lisp_Object tem;
+ tem = XCAR (obj);
+ PRINTCHAR ('(');
+
+ print_object (Qbackquote, printcharfun, 0);
+ PRINTCHAR (' ');
+
+ ++old_backquote_output;
+ print_object (XCAR (XCDR (tem)), printcharfun, 0);
+ --old_backquote_output;
+ PRINTCHAR (')');
+
+ obj = XCDR (obj);
+ }
+
{
- register int i = 0;
- register int print_length = 0;
+ int print_length, i;
Lisp_Object halftail = obj;
- if (INTEGERP (Vprint_length))
- print_length = XINT (Vprint_length);
+ /* Negative values of print-length are invalid in CL.
+ Treat them like nil, as CMUCL does. */
+ if (NATNUMP (Vprint_length))
+ print_length = XFASTINT (Vprint_length);
+ else
+ print_length = 0;
+
+ i = 0;
while (CONSP (obj))
{
/* Detect circular list. */
{
int i;
for (i = 0; i < print_number_index; i++)
- if (PRINT_NUMBER_OBJECT (Vprint_number_table, i) == obj)
+ if (EQ (PRINT_NUMBER_OBJECT (Vprint_number_table, i),
+ obj))
{
if (NILP (PRINT_NUMBER_STATUS (Vprint_number_table, i)))
{
}
}
}
+
if (i++)
PRINTCHAR (' ');
+
if (print_length && i > print_length)
{
strout ("...", 3, 3, printcharfun, 0);
goto end_of_list;
}
+
print_object (XCAR (obj), printcharfun, escapeflag);
+
obj = XCDR (obj);
if (!(i & 1))
halftail = XCDR (halftail);
}
}
+
+ /* OBJ non-nil here means it's the end of a dotted list. */
if (!NILP (obj))
{
strout (" . ", 3, 3, printcharfun, 0);
print_object (obj, printcharfun, escapeflag);
}
+
end_of_list:
PRINTCHAR (')');
}
strout (buf, -1, -1, printcharfun, 0);
PRINTCHAR ('\"');
- /* Don't print more characters than the specified maximum. */
- if (INTEGERP (Vprint_length)
- && XINT (Vprint_length) < size_in_chars)
- size_in_chars = XINT (Vprint_length);
+ /* Don't print more characters than the specified maximum.
+ Negative values of print-length are invalid. Treat them
+ like a print-length of nil. */
+ if (NATNUMP (Vprint_length)
+ && XFASTINT (Vprint_length) < size_in_chars)
+ size_in_chars = XFASTINT (Vprint_length);
for (i = 0; i < size_in_chars; i++)
{
{
PRINTCHAR (' ');
PRINTCHAR ('\'');
- strout (XSYMBOL (h->test)->name->data, -1, -1, printcharfun, 0);
+ strout (SDATA (SYMBOL_NAME (h->test)), -1, -1, printcharfun, 0);
PRINTCHAR (' ');
- strout (XSYMBOL (h->weak)->name->data, -1, -1, printcharfun, 0);
+ strout (SDATA (SYMBOL_NAME (h->weak)), -1, -1, printcharfun, 0);
PRINTCHAR (' ');
sprintf (buf, "%d/%d", XFASTINT (h->count),
XVECTOR (h->next)->size);
? "#<frame " : "#<dead frame "),
-1, -1, printcharfun, 0);
print_string (XFRAME (obj)->name, printcharfun);
- sprintf (buf, " 0x%lx\\ ", (unsigned long) (XFRAME (obj)));
+ sprintf (buf, " 0x%lx", (unsigned long) (XFRAME (obj)));
strout (buf, -1, -1, printcharfun, 0);
PRINTCHAR ('>');
}
{
register int i;
register Lisp_Object tem;
+ int real_size = size;
/* Don't print more elements than the specified maximum. */
- if (INTEGERP (Vprint_length)
- && XINT (Vprint_length) < size)
- size = XINT (Vprint_length);
+ if (NATNUMP (Vprint_length)
+ && XFASTINT (Vprint_length) < size)
+ size = XFASTINT (Vprint_length);
for (i = 0; i < size; i++)
{
tem = XVECTOR (obj)->contents[i];
print_object (tem, printcharfun, escapeflag);
}
+ if (size < real_size)
+ strout (" ...", 4, 4, printcharfun, 0);
}
PRINTCHAR (']');
}
strout ("#<marker ", -1, -1, printcharfun, 0);
/* Do you think this is necessary? */
if (XMARKER (obj)->insertion_type != 0)
- strout ("(before-insertion) ", -1, -1, printcharfun, 0);
+ strout ("(moves after insertion) ", -1, -1, printcharfun, 0);
if (!(XMARKER (obj)->buffer))
strout ("in no buffer", -1, -1, printcharfun, 0);
else
case Lisp_Misc_Buffer_Objfwd:
strout ("#<buffer_objfwd to ", -1, -1, printcharfun, 0);
- print_object (*(Lisp_Object *)((char *)current_buffer
- + XBUFFER_OBJFWD (obj)->offset),
- printcharfun, escapeflag);
+ print_object (PER_BUFFER_VALUE (current_buffer,
+ XBUFFER_OBJFWD (obj)->offset),
+ printcharfun, escapeflag);
PRINTCHAR ('>');
break;
strout ("#<kboard_objfwd to ", -1, -1, printcharfun, 0);
print_object (*(Lisp_Object *)((char *) current_kboard
+ XKBOARD_OBJFWD (obj)->offset),
- printcharfun, escapeflag);
+ printcharfun, escapeflag);
PRINTCHAR ('>');
break;
print_depth--;
}
\f
-#ifdef USE_TEXT_PROPERTIES
/* Print a description of INTERVAL using PRINTCHARFUN.
This is part of printing a string that has text properties. */
print_object (interval->plist, printcharfun, 1);
}
-#endif /* USE_TEXT_PROPERTIES */
\f
void
syms_of_print ()
staticpro (&Qtemp_buffer_setup_hook);
DEFVAR_LISP ("standard-output", &Vstandard_output,
- "Output stream `print' uses by default for outputting a character.\n\
-This may be any function of one argument.\n\
-It may also be a buffer (output is inserted before point)\n\
-or a marker (output is inserted and the marker is advanced)\n\
-or the symbol t (output appears in the echo area).");
+ doc: /* 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 echo area). */);
Vstandard_output = Qt;
Qstandard_output = intern ("standard-output");
staticpro (&Qstandard_output);
-#ifdef LISP_FLOAT_TYPE
DEFVAR_LISP ("float-output-format", &Vfloat_output_format,
- "The format descriptor string used to print floats.\n\
-This is a %-spec like those accepted by `printf' in C,\n\
-but with some restrictions. It must start with the two characters `%.'.\n\
-After that comes an integer precision specification,\n\
-and then a letter which controls the format.\n\
-The letters allowed are `e', `f' and `g'.\n\
-Use `e' for exponential notation \"DIG.DIGITSeEXPT\"\n\
-Use `f' for decimal point notation \"DIGITS.DIGITS\".\n\
-Use `g' to choose the shorter of those two formats for the number at hand.\n\
-The precision in any of these cases is the number of digits following\n\
-the decimal point. With `f', a precision of 0 means to omit the\n\
-decimal point. 0 is not allowed with `e' or `g'.\n\n\
-A value of nil means to use the shortest notation\n\
-that represents the number without losing information.");
+ doc: /* The format descriptor string used 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 `e' or `g'.
+
+A value of nil means to use the shortest notation
+that represents the number without losing information. */);
Vfloat_output_format = Qnil;
Qfloat_output_format = intern ("float-output-format");
staticpro (&Qfloat_output_format);
-#endif /* LISP_FLOAT_TYPE */
DEFVAR_LISP ("print-length", &Vprint_length,
- "Maximum length of list to print before abbreviating.\n\
-A value of nil means no limit.");
+ doc: /* Maximum length of list to print before abbreviating.
+A value of nil means no limit. See also `eval-expression-print-length'. */);
Vprint_length = Qnil;
DEFVAR_LISP ("print-level", &Vprint_level,
- "Maximum depth of list nesting to print before abbreviating.\n\
-A value of nil means no limit.");
+ doc: /* Maximum depth of list nesting to print before abbreviating.
+A value of nil means no limit. See also `eval-expression-print-level'. */);
Vprint_level = Qnil;
DEFVAR_BOOL ("print-escape-newlines", &print_escape_newlines,
- "Non-nil means print newlines in strings as backslash-n.\n\
-Also print formfeeds as backslash-f.");
+ doc: /* Non-nil means print newlines in strings as `\\n'.
+Also print formfeeds as `\\f'. */);
print_escape_newlines = 0;
DEFVAR_BOOL ("print-escape-nonascii", &print_escape_nonascii,
- "Non-nil means print unibyte non-ASCII chars in strings as \\OOO.\n\
-\(OOO is the octal representation of the character code.)\n\
-Only single-byte characters are affected, and only in `prin1'.");
+ doc: /* Non-nil means print unibyte non-ASCII chars in strings as \\OOO.
+\(OOO is the octal representation of the character code.)
+Only single-byte characters are affected, and only in `prin1'. */);
print_escape_nonascii = 0;
DEFVAR_BOOL ("print-escape-multibyte", &print_escape_multibyte,
- "Non-nil means print multibyte characters in strings as \\xXXXX.\n\
-\(XXX is the hex representation of the character code.)\n\
-This affects only `prin1'.");
+ doc: /* Non-nil means print multibyte characters in strings as \\xXXXX.
+\(XXXX is the hex representation of the character code.)
+This affects only `prin1'. */);
print_escape_multibyte = 0;
DEFVAR_BOOL ("print-quoted", &print_quoted,
- "Non-nil means print quoted forms with reader syntax.\n\
-I.e., (quote foo) prints as 'foo, (function foo) as #'foo, and, backquoted\n\
-forms print in the new syntax.");
+ doc: /* Non-nil means print quoted forms with reader syntax.
+I.e., (quote foo) prints as 'foo, (function foo) as #'foo, and backquoted
+forms print as in the new syntax. */);
print_quoted = 0;
DEFVAR_LISP ("print-gensym", &Vprint_gensym,
- "Non-nil means print uninterned symbols so they will read as uninterned.\n\
-I.e., the value of (make-symbol \"foobar\") prints as #:foobar.\n\
-When the uninterned symbol appears within a recursive data structure\n\
-and the symbol appears more than once, in addition use the #N# and #N=\n\
-constructs as needed, so that multiple references to the same symbol are\n\
-shared once again when the text is read back.");
+ doc: /* Non-nil means print uninterned symbols so they will read as uninterned.
+I.e., the value of (make-symbol \"foobar\") prints as #:foobar.
+When the uninterned symbol appears within a recursive data structure,
+and the symbol appears more than once, in addition use the #N# and #N=
+constructs as needed, so that multiple references to the same symbol are
+shared once again when the text is read back. */);
Vprint_gensym = Qnil;
DEFVAR_LISP ("print-circle", &Vprint_circle,
- "*Non-nil means print recursive structures using #N= and #N# syntax.\n\
-If nil, printing proceeds recursively and may lead to\n\
-`max-lisp-eval-depth' being exceeded or an error may occur:\n\
-\"Apparently circular structure being printed.\" Also see\n\
-`print-length' and `print-level'.\n\
-If non-nil, shared substructures anywhere in the structure are printed\n\
-with `#N=' before the first occurrence (in the order of the print\n\
-representation) and `#N#' in place of each subsequent occurrence,\n\
-where N is a positive decimal integer.");
+ doc: /* *Non-nil means print recursive structures using #N= and #N# syntax.
+If nil, printing proceeds recursively and may lead to
+`max-lisp-eval-depth' being exceeded or an error may occur:
+\"Apparently circular structure being printed.\" Also see
+`print-length' and `print-level'.
+If non-nil, shared substructures anywhere in the structure are printed
+with `#N=' before the first occurrence (in the order of the print
+representation) and `#N#' in place of each subsequent occurrence,
+where N is a positive decimal integer. */);
Vprint_circle = Qnil;
DEFVAR_LISP ("print-continuous-numbering", &Vprint_continuous_numbering,
- "*Non-nil means keep numbering between several print functions.\n\
-See `print-gensym' nad `print-circle'. See also `print-number-table'.");
+ doc: /* *Non-nil means number continuously across print calls.
+This affects the numbers printed for #N= labels and #M# references.
+See also `print-circle', `print-gensym', and `print-number-table'.
+This variable should not be set with `setq'; bind it with a `let' instead. */);
Vprint_continuous_numbering = Qnil;
DEFVAR_LISP ("print-number-table", &Vprint_number_table,
- "A vector keeping the information of the current printed object.\n\
-This variable shouldn't be modified in Lisp level, but should be binded\n\
-with nil using let at the same position with `print-continuous-numbering',\n\
-so that the value of this variable can be freed after printing.");
+ doc: /* A vector used internally to produce `#N=' labels and `#N#' references.
+The Lisp printer uses this vector to detect Lisp objects referenced more
+than once.
+
+When you bind `print-continuous-numbering' to t, you should probably
+also bind `print-number-table' to nil. This ensures that the value of
+`print-number-table' can be garbage-collected once the printing is
+done. If all elements of `print-number-table' are nil, it means that
+the printing done so far has not found any shared structure or objects
+that need to be recorded in the table. */);
Vprint_number_table = Qnil;
/* prin1_to_string_buffer initialized in init_buffer_once in buffer.c */