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[Emacs-diffs] Changes to emacs/src/print.c [emacs-unicode-2]
|
From: |
Kenichi Handa |
|
Subject: |
[Emacs-diffs] Changes to emacs/src/print.c [emacs-unicode-2] |
|
Date: |
Mon, 08 Sep 2003 08:49:21 -0400 |
Index: emacs/src/print.c
diff -c /dev/null emacs/src/print.c:1.190.2.1
*** /dev/null Mon Sep 8 08:49:21 2003
--- emacs/src/print.c Mon Sep 8 08:48:12 2003
***************
*** 0 ****
--- 1,2183 ----
+ /* Lisp object printing and output streams.
+ Copyright (C) 1985, 86, 88, 93, 94, 95, 97, 98, 1999, 2000, 01, 2003
+ Free Software Foundation, Inc.
+
+ This file is part of GNU Emacs.
+
+ GNU Emacs 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.
+
+ GNU Emacs 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 GNU Emacs; see the file COPYING. If not, write to
+ the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, USA. */
+
+
+ #include <config.h>
+ #include <stdio.h>
+ #include "lisp.h"
+ #include "buffer.h"
+ #include "character.h"
+ #include "keyboard.h"
+ #include "frame.h"
+ #include "window.h"
+ #include "process.h"
+ #include "dispextern.h"
+ #include "termchar.h"
+ #include "intervals.h"
+
+ Lisp_Object Vstandard_output, Qstandard_output;
+
+ Lisp_Object Qtemp_buffer_setup_hook;
+
+ /* These are used to print like we read. */
+ extern Lisp_Object Qbackquote, Qcomma, Qcomma_at, Qcomma_dot, Qfunction;
+
+ Lisp_Object Vfloat_output_format, Qfloat_output_format;
+
+ /* Work around a problem that happens because math.h on hpux 7
+ defines two static variables--which, in Emacs, are not really static,
+ because `static' is defined as nothing. The problem is that they are
+ defined both here and in lread.c.
+ These macros prevent the name conflict. */
+ #if defined (HPUX) && !defined (HPUX8)
+ #define _MAXLDBL print_maxldbl
+ #define _NMAXLDBL print_nmaxldbl
+ #endif
+
+ #include <math.h>
+
+ #if STDC_HEADERS
+ #include <float.h>
+ #endif
+
+ /* Default to values appropriate for IEEE floating point. */
+ #ifndef FLT_RADIX
+ #define FLT_RADIX 2
+ #endif
+ #ifndef DBL_MANT_DIG
+ #define DBL_MANT_DIG 53
+ #endif
+ #ifndef DBL_DIG
+ #define DBL_DIG 15
+ #endif
+ #ifndef DBL_MIN
+ #define DBL_MIN 2.2250738585072014e-308
+ #endif
+
+ #ifdef DBL_MIN_REPLACEMENT
+ #undef DBL_MIN
+ #define DBL_MIN DBL_MIN_REPLACEMENT
+ #endif
+
+ /* Define DOUBLE_DIGITS_BOUND, an upper bound on the number of decimal digits
+ needed to express a float without losing information.
+ The general-case formula is valid for the usual case, IEEE floating point,
+ but many compilers can't optimize the formula to an integer constant,
+ so make a special case for it. */
+ #if FLT_RADIX == 2 && DBL_MANT_DIG == 53
+ #define DOUBLE_DIGITS_BOUND 17 /* IEEE floating point */
+ #else
+ #define DOUBLE_DIGITS_BOUND ((int) ceil (log10 (pow (FLT_RADIX,
DBL_MANT_DIG))))
+ #endif
+
+ /* 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];
+
+ /* When printing into a buffer, first we put the text in this
+ block, then insert it all at once. */
+ char *print_buffer;
+
+ /* Size allocated in print_buffer. */
+ int print_buffer_size;
+ /* Chars stored in print_buffer. */
+ int print_buffer_pos;
+ /* Bytes stored in print_buffer. */
+ int print_buffer_pos_byte;
+
+ /* Maximum length of list to print in full; noninteger means
+ effectively infinity */
+
+ Lisp_Object Vprint_length;
+
+ /* Maximum depth of list to print in full; noninteger means
+ effectively infinity. */
+
+ Lisp_Object Vprint_level;
+
+ /* Nonzero means print newlines in strings as \n. */
+
+ int print_escape_newlines;
+
+ /* Nonzero means to print single-byte non-ascii characters in strings as
+ octal escapes. */
+
+ int print_escape_nonascii;
+
+ /* Nonzero means to print multibyte characters in strings as hex escapes. */
+
+ int print_escape_multibyte;
+
+ Lisp_Object Qprint_escape_newlines;
+ Lisp_Object Qprint_escape_multibyte, Qprint_escape_nonascii;
+
+ /* Nonzero means print (quote foo) forms as 'foo, etc. */
+
+ int print_quoted;
+
+ /* Non-nil means print #: before uninterned symbols. */
+
+ Lisp_Object Vprint_gensym;
+
+ /* Non-nil means print recursive structures using #n= and #n# syntax. */
+
+ Lisp_Object Vprint_circle;
+
+ /* Non-nil means keep continuous number for #n= and #n# syntax
+ between several print functions. */
+
+ Lisp_Object Vprint_continuous_numbering;
+
+ /* Vprint_number_table is a vector like [OBJ1 STAT1 OBJ2 STAT2 ...],
+ where OBJn are objects going to be printed, and STATn are their status,
+ which may be different meanings during process. See the comments of
+ the functions print and print_preprocess for details.
+ print_number_index keeps the last position the next object should be added,
+ twice of which is the actual vector position in Vprint_number_table. */
+ int print_number_index;
+ Lisp_Object Vprint_number_table;
+
+ /* PRINT_NUMBER_OBJECT returns the I'th object in Vprint_number_table TABLE.
+ PRINT_NUMBER_STATUS returns the status of the I'th object in TABLE.
+ See the comment of the variable Vprint_number_table. */
+ #define PRINT_NUMBER_OBJECT(table,i) XVECTOR ((table))->contents[(i) * 2]
+ #define PRINT_NUMBER_STATUS(table,i) XVECTOR ((table))->contents[(i) * 2 + 1]
+
+ /* Nonzero means print newline to stdout before next minibuffer message.
+ Defined in xdisp.c */
+
+ extern int noninteractive_need_newline;
+
+ extern int minibuffer_auto_raise;
+
+ #ifdef MAX_PRINT_CHARS
+ static int print_chars;
+ static int max_print;
+ #endif /* MAX_PRINT_CHARS */
+
+ void print_interval ();
+
+
+ /* Low level output routines for characters and strings */
+
+ /* Lisp functions to do output using a stream
+ must have the stream in a variable called printcharfun
+ 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. */
+
+ #define PRINTDECLARE \
+ struct buffer *old = current_buffer;
\
+ 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
+
+ #define PRINTPREPARE \
+ original = printcharfun; \
+ if (NILP (printcharfun)) printcharfun = Qt;
\
+ if (BUFFERP (printcharfun))
\
+ {
\
+ if (XBUFFER (printcharfun) != current_buffer) \
+ Fset_buffer (printcharfun); \
+ printcharfun = Qnil; \
+ }
\
+ if (MARKERP (printcharfun))
\
+ {
\
+ if (!(XMARKER (original)->buffer)) \
+ error ("Marker does not point anywhere"); \
+ if (XMARKER (original)->buffer != current_buffer) \
+ set_buffer_internal (XMARKER (original)->buffer); \
+ old_point = PT;
\
+ old_point_byte = PT_BYTE; \
+ SET_PT_BOTH (marker_position (printcharfun), \
+ marker_byte_position (printcharfun)); \
+ start_point = PT; \
+ start_point_byte = PT_BYTE; \
+ printcharfun = Qnil; \
+ }
\
+ if (NILP (printcharfun)) \
+ {
\
+ Lisp_Object string; \
+ if (NILP (current_buffer->enable_multibyte_characters) \
+ && ! print_escape_multibyte) \
+ specbind (Qprint_escape_multibyte, Qt); \
+ if (! NILP (current_buffer->enable_multibyte_characters)
\
+ && ! print_escape_nonascii) \
+ specbind (Qprint_escape_nonascii, Qt);
\
+ if (print_buffer != 0) \
+ { \
+ string = make_string_from_bytes (print_buffer, \
+ print_buffer_pos, \
+ print_buffer_pos_byte); \
+ record_unwind_protect (print_unwind, string); \
+ } \
+ else \
+ { \
+ print_buffer_size = 1000; \
+ print_buffer = (char *) xmalloc (print_buffer_size);
\
+ free_print_buffer = 1; \
+ } \
+ print_buffer_pos = 0; \
+ print_buffer_pos_byte = 0; \
+ }
\
+ if (EQ (printcharfun, Qt) && ! noninteractive) \
+ setup_echo_area_for_printing (multibyte);
+
+ #define PRINTFINISH \
+ if (NILP (printcharfun)) \
+ {
\
+ if (print_buffer_pos != print_buffer_pos_byte \
+ && NILP (current_buffer->enable_multibyte_characters)) \
+ { \
+ unsigned char *temp \
+ = (unsigned char *) alloca (print_buffer_pos + 1); \
+ copy_text (print_buffer, temp, print_buffer_pos_byte, \
+ 1, 0); \
+ insert_1_both (temp, print_buffer_pos, \
+ print_buffer_pos, 0, 1, 0); \
+ } \
+ else \
+ insert_1_both (print_buffer, print_buffer_pos, \
+ print_buffer_pos_byte, 0, 1, 0); \
+ }
\
+ if (free_print_buffer) \
+ {
\
+ xfree (print_buffer); \
+ print_buffer = 0; \
+ }
\
+ unbind_to (specpdl_count, Qnil); \
+ if (MARKERP (original)) \
+ set_marker_both (original, Qnil, PT, PT_BYTE); \
+ if (old_point >= 0)
\
+ SET_PT_BOTH (old_point + (old_point >= start_point
\
+ ? PT - start_point : 0), \
+ old_point_byte + (old_point_byte >= start_point_byte \
+ ? PT_BYTE - start_point_byte : 0)); \
+ if (old != current_buffer) \
+ set_buffer_internal (old);
+
+ #define PRINTCHAR(ch) printchar (ch, printcharfun)
+
+ /* This is used to restore the saved contents of print_buffer
+ when there is a recursive call to print. */
+
+ static Lisp_Object
+ print_unwind (saved_text)
+ Lisp_Object saved_text;
+ {
+ bcopy (SDATA (saved_text), print_buffer, SCHARS (saved_text));
+ return Qnil;
+ }
+
+
+ /* Print character CH using method FUN. FUN nil means print to
+ print_buffer. FUN t means print to echo area or stdout if
+ non-interactive. If FUN is neither nil nor t, call FUN with CH as
+ argument. */
+
+ static void
+ printchar (ch, fun)
+ unsigned int ch;
+ Lisp_Object fun;
+ {
+ #ifdef MAX_PRINT_CHARS
+ if (max_print)
+ print_chars++;
+ #endif /* MAX_PRINT_CHARS */
+
+ if (!NILP (fun) && !EQ (fun, Qt))
+ call1 (fun, make_number (ch));
+ else
+ {
+ 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)
+ print_buffer = (char *) xrealloc (print_buffer,
+ print_buffer_size *= 2);
+ bcopy (str, print_buffer + print_buffer_pos_byte, len);
+ print_buffer_pos += 1;
+ print_buffer_pos_byte += len;
+ }
+ else if (noninteractive)
+ {
+ fwrite (str, 1, len, stdout);
+ noninteractive_need_newline = 1;
+ }
+ else
+ {
+ int multibyte_p
+ = !NILP (current_buffer->enable_multibyte_characters);
+
+ setup_echo_area_for_printing (multibyte_p);
+ insert_char (ch);
+ message_dolog (str, len, 0, multibyte_p);
+ }
+ }
+ }
+
+
+ /* Output SIZE characters, SIZE_BYTE bytes from string PTR using
+ method PRINTCHARFUN. If SIZE < 0, use the string length of PTR for
+ both SIZE and SIZE_BYTE. PRINTCHARFUN nil means output to
+ print_buffer. PRINTCHARFUN t means output to the echo area or to
+ stdout if non-interactive. If neither nil nor t, call Lisp
+ function PRINTCHARFUN for each character printed. MULTIBYTE
+ non-zero means PTR contains multibyte characters. */
+
+ static void
+ strout (ptr, size, size_byte, printcharfun, multibyte)
+ char *ptr;
+ int size, size_byte;
+ Lisp_Object printcharfun;
+ int multibyte;
+ {
+ if (size < 0)
+ size_byte = size = strlen (ptr);
+
+ if (NILP (printcharfun))
+ {
+ if (print_buffer_pos_byte + size_byte > print_buffer_size)
+ {
+ print_buffer_size = print_buffer_size * 2 + size_byte;
+ print_buffer = (char *) xrealloc (print_buffer,
+ print_buffer_size);
+ }
+ bcopy (ptr, print_buffer + print_buffer_pos_byte, size_byte);
+ print_buffer_pos += size;
+ print_buffer_pos_byte += size_byte;
+
+ #ifdef MAX_PRINT_CHARS
+ if (max_print)
+ print_chars += size;
+ #endif /* MAX_PRINT_CHARS */
+ }
+ else if (noninteractive && EQ (printcharfun, Qt))
+ {
+ fwrite (ptr, 1, size_byte, stdout);
+ noninteractive_need_newline = 1;
+ }
+ else if (EQ (printcharfun, Qt))
+ {
+ /* Output to echo area. We're trying to avoid a little overhead
+ here, that's the reason we don't call printchar to do the
+ job. */
+ int i;
+ int multibyte_p
+ = !NILP (current_buffer->enable_multibyte_characters);
+
+ 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 ((unsigned char )*ptr++);
+ }
+ else
+ {
+ int len;
+ for (i = 0; i < size_byte; i += len)
+ {
+ int ch = STRING_CHAR_AND_LENGTH (ptr + i, size_byte - i, len);
+ insert_char (ch);
+ }
+ }
+
+ #ifdef MAX_PRINT_CHARS
+ if (max_print)
+ print_chars += size;
+ #endif /* MAX_PRINT_CHARS */
+ }
+ else
+ {
+ /* PRINTCHARFUN is a Lisp function. */
+ int i = 0;
+
+ if (size == size_byte)
+ {
+ while (i < size_byte)
+ {
+ int ch = ptr[i++];
+ PRINTCHAR (ch);
+ }
+ }
+ else
+ {
+ while (i < size_byte)
+ {
+ /* 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 (ptr + i, size_byte - i, len);
+ PRINTCHAR (ch);
+ i += len;
+ }
+ }
+ }
+ }
+
+ /* Print the contents of a string STRING using PRINTCHARFUN.
+ It isn't safe to use strout in many cases,
+ because printing one char can relocate. */
+
+ static void
+ print_string (string, printcharfun)
+ Lisp_Object string;
+ Lisp_Object printcharfun;
+ {
+ if (EQ (printcharfun, Qt) || NILP (printcharfun))
+ {
+ int chars;
+
+ if (print_escape_nonascii)
+ string = string_escape_byte8 (string);
+
+ if (STRING_MULTIBYTE (string))
+ chars = SCHARS (string);
+ else if (! print_escape_nonascii
+ && (EQ (printcharfun, Qt)
+ ? ! NILP (buffer_defaults.enable_multibyte_characters)
+ : ! NILP (current_buffer->enable_multibyte_characters)))
+ {
+ /* 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 = SBYTES (string);
+
+ /* strout is safe for output to a frame (echo area) or to print_buffer.
*/
+ 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 = SCHARS (string);
+ int size_byte = SBYTES (string);
+ struct gcpro gcpro1;
+ GCPRO1 (string);
+ if (size == size_byte)
+ for (i = 0; i < size; 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 (SDATA (string) + i,
+ size_byte - i, len);
+ PRINTCHAR (ch);
+ i += len;
+ }
+ UNGCPRO;
+ }
+ }
+
+ DEFUN ("write-char", Fwrite_char, Swrite_char, 1, 2, 0,
+ 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);
+ PRINTPREPARE;
+ PRINTCHAR (XINT (character));
+ PRINTFINISH;
+ return character;
+ }
+
+ /* Used from outside of print.c to print a block of SIZE
+ single-byte chars at DATA on the default output stream.
+ Do not use this on the contents of a Lisp string. */
+
+ void
+ write_string (data, size)
+ char *data;
+ int size;
+ {
+ PRINTDECLARE;
+ Lisp_Object printcharfun;
+
+ printcharfun = Vstandard_output;
+
+ PRINTPREPARE;
+ strout (data, size, size, printcharfun, 0);
+ PRINTFINISH;
+ }
+
+ /* Used from outside of print.c to print a block of SIZE
+ single-byte chars at DATA on a specified stream PRINTCHARFUN.
+ Do not use this on the contents of a Lisp string. */
+
+ void
+ write_string_1 (data, size, printcharfun)
+ char *data;
+ int size;
+ Lisp_Object printcharfun;
+ {
+ PRINTDECLARE;
+
+ PRINTPREPARE;
+ strout (data, size, size, printcharfun, 0);
+ PRINTFINISH;
+ }
+
+
+ void
+ temp_output_buffer_setup (bufname)
+ const char *bufname;
+ {
+ int count = SPECPDL_INDEX ();
+ register struct buffer *old = current_buffer;
+ register Lisp_Object buf;
+
+ record_unwind_protect (set_buffer_if_live, Fcurrent_buffer ());
+
+ Fset_buffer (Fget_buffer_create (build_string (bufname)));
+
+ Fkill_all_local_variables ();
+ delete_all_overlays (current_buffer);
+ current_buffer->directory = old->directory;
+ current_buffer->read_only = Qnil;
+ current_buffer->filename = Qnil;
+ current_buffer->undo_list = Qt;
+ eassert (current_buffer->overlays_before == NULL);
+ eassert (current_buffer->overlays_after == NULL);
+ current_buffer->enable_multibyte_characters
+ = buffer_defaults.enable_multibyte_characters;
+ Ferase_buffer ();
+ XSETBUFFER (buf, current_buffer);
+
+ Frun_hooks (1, &Qtemp_buffer_setup_hook);
+
+ unbind_to (count, Qnil);
+
+ specbind (Qstandard_output, buf);
+ }
+
+ Lisp_Object
+ internal_with_output_to_temp_buffer (bufname, function, args)
+ const char *bufname;
+ Lisp_Object (*function) P_ ((Lisp_Object));
+ Lisp_Object args;
+ {
+ int count = SPECPDL_INDEX ();
+ Lisp_Object buf, val;
+ struct gcpro gcpro1;
+
+ GCPRO1 (args);
+ record_unwind_protect (Fset_buffer, Fcurrent_buffer ());
+ temp_output_buffer_setup (bufname);
+ buf = Vstandard_output;
+ UNGCPRO;
+
+ val = (*function) (args);
+
+ GCPRO1 (val);
+ temp_output_buffer_show (buf);
+ UNGCPRO;
+
+ return unbind_to (count, val);
+ }
+
+ DEFUN ("with-output-to-temp-buffer",
+ Fwith_output_to_temp_buffer, Swith_output_to_temp_buffer,
+ 1, UNEVALLED, 0,
+ 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_INDEX ();
+ Lisp_Object buf, val;
+
+ GCPRO1(args);
+ name = Feval (Fcar (args));
+ CHECK_STRING (name);
+ temp_output_buffer_setup (SDATA (name));
+ buf = Vstandard_output;
+ UNGCPRO;
+
+ val = Fprogn (XCDR (args));
+
+ GCPRO1 (val);
+ temp_output_buffer_show (buf);
+ UNGCPRO;
+
+ return unbind_to (count, val);
+ }
+
+
+ static void print ();
+ static void print_preprocess ();
+ static void print_preprocess_string ();
+ static void print_object ();
+
+ DEFUN ("terpri", Fterpri, Sterpri, 0, 1, 0,
+ doc: /* Output a newline to stream PRINTCHARFUN.
+ If PRINTCHARFUN is omitted or nil, the value of `standard-output' is used.
*/)
+ (printcharfun)
+ Lisp_Object printcharfun;
+ {
+ PRINTDECLARE;
+
+ if (NILP (printcharfun))
+ printcharfun = Vstandard_output;
+ PRINTPREPARE;
+ PRINTCHAR ('\n');
+ PRINTFINISH;
+ return Qt;
+ }
+
+ DEFUN ("prin1", Fprin1, Sprin1, 1, 2, 0,
+ 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;
+
+ #ifdef MAX_PRINT_CHARS
+ max_print = 0;
+ #endif /* MAX_PRINT_CHARS */
+ if (NILP (printcharfun))
+ printcharfun = Vstandard_output;
+ PRINTPREPARE;
+ print (object, printcharfun, 1);
+ PRINTFINISH;
+ 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,
+ 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;
+ Lisp_Object printcharfun;
+ /* struct gcpro gcpro1, gcpro2; */
+ Lisp_Object save_deactivate_mark;
+ int count = specpdl_ptr - specpdl;
+
+ specbind (Qinhibit_modification_hooks, Qt);
+
+ /* Save and restore this--we are altering a buffer
+ but we don't want to deactivate the mark just for that.
+ No need for specbind, since errors deactivate the mark. */
+ save_deactivate_mark = Vdeactivate_mark;
+ /* GCPRO2 (object, save_deactivate_mark); */
+ abort_on_gc++;
+
+ printcharfun = Vprin1_to_string_buffer;
+ PRINTPREPARE;
+ print (object, printcharfun, NILP (noescape));
+ /* Make Vprin1_to_string_buffer be the default buffer after PRINTFINSH */
+ 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);
+
+ Vdeactivate_mark = save_deactivate_mark;
+ /* UNGCPRO; */
+
+ abort_on_gc--;
+ return unbind_to (count, object);
+ }
+
+ DEFUN ("princ", Fprinc, Sprinc, 1, 2, 0,
+ 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;
+
+ if (NILP (printcharfun))
+ printcharfun = Vstandard_output;
+ PRINTPREPARE;
+ print (object, printcharfun, 0);
+ PRINTFINISH;
+ return object;
+ }
+
+ DEFUN ("print", Fprint, Sprint, 1, 2, 0,
+ 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;
+ struct gcpro gcpro1;
+
+ #ifdef MAX_PRINT_CHARS
+ print_chars = 0;
+ max_print = MAX_PRINT_CHARS;
+ #endif /* MAX_PRINT_CHARS */
+ if (NILP (printcharfun))
+ printcharfun = Vstandard_output;
+ GCPRO1 (object);
+ PRINTPREPARE;
+ PRINTCHAR ('\n');
+ print (object, printcharfun, 1);
+ PRINTCHAR ('\n');
+ PRINTFINISH;
+ #ifdef MAX_PRINT_CHARS
+ max_print = 0;
+ print_chars = 0;
+ #endif /* MAX_PRINT_CHARS */
+ UNGCPRO;
+ return object;
+ }
+
+ /* The subroutine object for external-debugging-output is kept here
+ for the convenience of the debugger. */
+ Lisp_Object Qexternal_debugging_output;
+
+ DEFUN ("external-debugging-output", Fexternal_debugging_output,
Sexternal_debugging_output, 1, 1, 0,
+ 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);
+ putc (XINT (character), stderr);
+
+ #ifdef WINDOWSNT
+ /* Send the output to a debugger (nothing happens if there isn't one). */
+ {
+ char buf[2] = {(char) XINT (character), '\0'};
+ OutputDebugString (buf);
+ }
+ #endif
+
+ return character;
+ }
+
+ /* This is the interface for debugging printing. */
+
+ void
+ debug_print (arg)
+ Lisp_Object arg;
+ {
+ Fprin1 (arg, Qexternal_debugging_output);
+ fprintf (stderr, "\r\n");
+ }
+
+ DEFUN ("error-message-string", Ferror_message_string, Serror_message_string,
+ 1, 1, 0,
+ doc: /* Convert an error value (ERROR-SYMBOL . DATA) to an error
message. */)
+ (obj)
+ Lisp_Object obj;
+ {
+ struct buffer *old = current_buffer;
+ Lisp_Object value;
+ struct gcpro gcpro1;
+
+ /* If OBJ is (error STRING), just return STRING.
+ That is not only faster, it also avoids the need to allocate
+ space here when the error is due to memory full. */
+ if (CONSP (obj) && EQ (XCAR (obj), Qerror)
+ && CONSP (XCDR (obj))
+ && STRINGP (XCAR (XCDR (obj)))
+ && NILP (XCDR (XCDR (obj))))
+ return XCAR (XCDR (obj));
+
+ print_error_message (obj, Vprin1_to_string_buffer, 0, Qnil);
+
+ set_buffer_internal (XBUFFER (Vprin1_to_string_buffer));
+ value = Fbuffer_string ();
+
+ GCPRO1 (value);
+ Ferase_buffer ();
+ set_buffer_internal (old);
+ UNGCPRO;
+
+ return value;
+ }
+
+ /* Print an error message for the error DATA onto Lisp output stream
+ STREAM (suitable for the print functions). */
+
+ void
+ 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;
+ errmsg = Fcar (data);
+ file_error = Qnil;
+ }
+ else
+ {
+ Lisp_Object error_conditions;
+ errmsg = Fget (errname, Qerror_message);
+ error_conditions = Fget (errname, Qerror_conditions);
+ file_error = Fmemq (Qfile_error, error_conditions);
+ }
+
+ /* Print an error message including the data items. */
+
+ tail = Fcdr_safe (data);
+ GCPRO1 (tail);
+
+ /* For file-error, make error message by concatenating
+ all the data items. They are all strings. */
+ if (!NILP (file_error) && CONSP (tail))
+ errmsg = XCAR (tail), tail = XCDR (tail);
+
+ if (STRINGP (errmsg))
+ Fprinc (errmsg, stream);
+ else
+ write_string_1 ("peculiar error", -1, stream);
+
+ for (i = 0; CONSP (tail); tail = XCDR (tail), i++)
+ {
+ Lisp_Object obj;
+
+ write_string_1 (i ? ", " : ": ", 2, stream);
+ obj = XCAR (tail);
+ if (!NILP (file_error) || EQ (errname, Qend_of_file))
+ Fprinc (obj, stream);
+ else
+ Fprin1 (obj, stream);
+ }
+
+ UNGCPRO;
+ }
+
+
+
+ /*
+ * 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)?
+ * -wsr
+ */
+
+ void
+ float_to_string (buf, data)
+ unsigned char *buf;
+ double data;
+ {
+ 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)
+ {
+ strcpy (buf, "1.0e+INF");
+ return;
+ }
+ /* Likewise for minus infinity. */
+ if (data == data / 2 && data < -1.0)
+ {
+ strcpy (buf, "-1.0e+INF");
+ return;
+ }
+ /* 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;
+ }
+
+ if (NILP (Vfloat_output_format)
+ || !STRINGP (Vfloat_output_format))
+ lose:
+ {
+ /* Generate the fewest number of digits that represent the
+ floating point value without losing information.
+ The following method is simple but a bit slow.
+ For ideas about speeding things up, please see:
+
+ Guy L Steele Jr & Jon L White, How to print floating-point numbers
+ accurately. SIGPLAN notices 25, 6 (June 1990), 112-126.
+
+ Robert G Burger & R Kent Dybvig, Printing floating point numbers
+ quickly and accurately, SIGPLAN notices 31, 5 (May 1996), 108-116. */
+
+ width = fabs (data) < DBL_MIN ? 1 : DBL_DIG;
+ do
+ sprintf (buf, "%.*g", width, data);
+ while (width++ < DOUBLE_DIGITS_BOUND && atof (buf) != 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 = SDATA (Vfloat_output_format);
+
+ if (cp[0] != '%')
+ goto lose;
+ if (cp[1] != '.')
+ goto lose;
+
+ cp += 2;
+
+ /* Check the width specification. */
+ width = -1;
+ if ('0' <= *cp && *cp <= '9')
+ {
+ width = 0;
+ do
+ width = (width * 10) + (*cp++ - '0');
+ while (*cp >= '0' && *cp <= '9');
+
+ /* A precision of zero is valid only for %f. */
+ if (width > DBL_DIG
+ || (width == 0 && *cp != 'f'))
+ goto lose;
+ }
+
+ if (*cp != 'e' && *cp != 'f' && *cp != 'g')
+ goto lose;
+
+ if (cp[1] != 0)
+ goto lose;
+
+ sprintf (buf, SDATA (Vfloat_output_format), data);
+ }
+
+ /* Make sure there is a decimal point with digit after, or an
+ exponent, so that the value is readable as a float. But don't do
+ this with "%.0f"; it's valid for that not to produce a decimal
+ point. Note that width can be 0 only for %.0f. */
+ if (width != 0)
+ {
+ for (cp = buf; *cp; cp++)
+ if ((*cp < '0' || *cp > '9') && *cp != '-')
+ break;
+
+ if (*cp == '.' && cp[1] == 0)
+ {
+ cp[1] = '0';
+ cp[2] = 0;
+ }
+
+ if (*cp == 0)
+ {
+ *cp++ = '.';
+ *cp++ = '0';
+ *cp++ = 0;
+ }
+ }
+ }
+
+
+ static void
+ print (obj, printcharfun, escapeflag)
+ Lisp_Object obj;
+ register Lisp_Object printcharfun;
+ 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,
+ the values of these variables will be kept between several
+ print functions. */
+ if (NILP (Vprint_continuous_numbering))
+ {
+ print_number_index = 0;
+ Vprint_number_table = Qnil;
+ }
+
+ /* Construct Vprint_number_table for print-gensym and print-circle. */
+ if (!NILP (Vprint_gensym) || !NILP (Vprint_circle))
+ {
+ 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. 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);
+ 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;
+ }
+
+ print_object (obj, printcharfun, escapeflag);
+ }
+
+ /* Construct Vprint_number_table according to the structure of OBJ.
+ OBJ itself and all its elements will be added to Vprint_number_table
+ recursively if it is a list, vector, compiled function, char-table,
+ string (its text properties will be traced), or a symbol that has
+ no obarray (this is for the print-gensym feature).
+ The status fields of Vprint_number_table mean whether each object appears
+ more than once in OBJ: Qnil at the first time, and Qt after that . */
+ static void
+ print_preprocess (obj)
+ Lisp_Object obj;
+ {
+ int i, size;
+
+ loop:
+ if (STRINGP (obj) || CONSP (obj) || VECTORP (obj)
+ || COMPILEDP (obj) || CHAR_TABLE_P (obj)
+ || (! NILP (Vprint_gensym)
+ && SYMBOLP (obj)
+ && !SYMBOL_INTERNED_P (obj)))
+ {
+ /* 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))
+ {
+ 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)
+ {
+ /* 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++;
+ }
+
+ switch (XGCTYPE (obj))
+ {
+ case Lisp_String:
+ /* A string may have text properties, which can be circular. */
+ traverse_intervals_noorder (STRING_INTERVALS (obj),
+ print_preprocess_string, Qnil);
+ break;
+
+ case Lisp_Cons:
+ print_preprocess (XCAR (obj));
+ obj = XCDR (obj);
+ goto loop;
+
+ case Lisp_Vectorlike:
+ size = XVECTOR (obj)->size & PSEUDOVECTOR_SIZE_MASK;
+ for (i = 0; i < size; i++)
+ print_preprocess (XVECTOR (obj)->contents[i]);
+ break;
+
+ default:
+ break;
+ }
+ }
+ }
+
+ static void
+ print_preprocess_string (interval, arg)
+ INTERVAL interval;
+ Lisp_Object arg;
+ {
+ print_preprocess (interval->plist);
+ }
+
+ static void
+ print_object (obj, printcharfun, escapeflag)
+ Lisp_Object obj;
+ register Lisp_Object printcharfun;
+ int escapeflag;
+ {
+ char buf[30];
+
+ QUIT;
+
+ /* Detect circularities and truncate them. */
+ if (STRINGP (obj) || CONSP (obj) || VECTORP (obj)
+ || COMPILEDP (obj) || CHAR_TABLE_P (obj)
+ || (! NILP (Vprint_gensym)
+ && SYMBOLP (obj)
+ && !SYMBOL_INTERNED_P (obj)))
+ {
+ if (NILP (Vprint_circle) && NILP (Vprint_gensym))
+ {
+ /* Simple but incomplete way. */
+ int i;
+ for (i = 0; i < print_depth; i++)
+ if (EQ (obj, being_printed[i]))
+ {
+ sprintf (buf, "#%d", i);
+ strout (buf, -1, -1, printcharfun, 0);
+ return;
+ }
+ being_printed[print_depth] = obj;
+ }
+ else
+ {
+ /* With the print-circle feature. */
+ int i;
+ for (i = 0; i < print_number_index; i++)
+ if (EQ (PRINT_NUMBER_OBJECT (Vprint_number_table, i), obj))
+ {
+ if (NILP (PRINT_NUMBER_STATUS (Vprint_number_table, i)))
+ {
+ /* Add a prefix #n= if OBJ has not yet been printed;
+ that is, its status field is nil. */
+ sprintf (buf, "#%d=", i + 1);
+ strout (buf, -1, -1, printcharfun, 0);
+ /* OBJ is going to be printed. Set the status to t. */
+ PRINT_NUMBER_STATUS (Vprint_number_table, i) = Qt;
+ break;
+ }
+ else
+ {
+ /* Just print #n# if OBJ has already been printed. */
+ sprintf (buf, "#%d#", i + 1);
+ strout (buf, -1, -1, printcharfun, 0);
+ return;
+ }
+ }
+ }
+ }
+
+ print_depth++;
+
+ if (print_depth > PRINT_CIRCLE)
+ error ("Apparently circular structure being printed");
+ #ifdef MAX_PRINT_CHARS
+ if (max_print && print_chars > max_print)
+ {
+ PRINTCHAR ('\n');
+ print_chars = 0;
+ }
+ #endif /* MAX_PRINT_CHARS */
+
+ switch (XGCTYPE (obj))
+ {
+ case Lisp_Int:
+ if (sizeof (int) == sizeof (EMACS_INT))
+ sprintf (buf, "%d", XINT (obj));
+ else if (sizeof (long) == sizeof (EMACS_INT))
+ sprintf (buf, "%ld", (long) XINT (obj));
+ else
+ abort ();
+ strout (buf, -1, -1, printcharfun, 0);
+ break;
+
+ case Lisp_Float:
+ {
+ char pigbuf[350]; /* see comments in float_to_string */
+
+ float_to_string (pigbuf, XFLOAT_DATA (obj));
+ strout (pigbuf, -1, -1, printcharfun, 0);
+ }
+ break;
+
+ case Lisp_String:
+ if (!escapeflag)
+ print_string (obj, printcharfun);
+ else
+ {
+ register int i, i_byte;
+ 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);
+
+ if (!NULL_INTERVAL_P (STRING_INTERVALS (obj)))
+ {
+ PRINTCHAR ('#');
+ PRINTCHAR ('(');
+ }
+
+ PRINTCHAR ('\"');
+ str = SDATA (obj);
+ size_byte = SBYTES (obj);
+
+ 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.
*/
+ int len;
+ int c;
+
+ if (multibyte)
+ {
+ c = STRING_CHAR_AND_LENGTH (str + i_byte,
+ size_byte - i_byte, len);
+ i_byte += len;
+ }
+ else
+ c = str[i_byte++];
+
+ QUIT;
+
+ if (c == '\n' && print_escape_newlines)
+ {
+ PRINTCHAR ('\\');
+ PRINTCHAR ('n');
+ }
+ else if (c == '\f' && print_escape_newlines)
+ {
+ PRINTCHAR ('\\');
+ PRINTCHAR ('f');
+ }
+ else if (multibyte
+ && (CHAR_BYTE8_P (c) || print_escape_multibyte))
+ {
+ /* When multibyte is disabled,
+ 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];
+
+ if (CHAR_BYTE8_P (c))
+ sprintf (outbuf, "\\%03o", CHAR_TO_BYTE8 (c));
+ else
+ {
+ sprintf (outbuf, "\\x%04x", c);
+ need_nonhex = 1;
+ }
+ strout (outbuf, -1, -1, printcharfun, 0);
+ }
+ else if (! multibyte
+ && SINGLE_BYTE_CHAR_P (c) && ! ASCII_BYTE_P (c)
+ && print_escape_nonascii)
+ {
+ /* When printing in a multibyte buffer
+ or when explicitly requested,
+ print single-byte non-ASCII string chars
+ using octal escapes. */
+ unsigned char outbuf[5];
+ sprintf (outbuf, "\\%03o", c);
+ strout (outbuf, -1, -1, printcharfun, 0);
+ }
+ else
+ {
+ /* If we just had a hex escape, and this character
+ could be taken as part of it,
+ output `\ ' to prevent that. */
+ if (need_nonhex)
+ {
+ need_nonhex = 0;
+ if ((c >= 'a' && c <= 'f')
+ || (c >= 'A' && c <= 'F')
+ || (c >= '0' && c <= '9'))
+ strout ("\\ ", -1, -1, printcharfun, 0);
+ }
+
+ if (c == '\"' || c == '\\')
+ PRINTCHAR ('\\');
+ PRINTCHAR (c);
+ }
+ }
+ PRINTCHAR ('\"');
+
+ if (!NULL_INTERVAL_P (STRING_INTERVALS (obj)))
+ {
+ traverse_intervals (STRING_INTERVALS (obj),
+ 0, print_interval, printcharfun);
+ PRINTCHAR (')');
+ }
+
+ UNGCPRO;
+ }
+ break;
+
+ case Lisp_Symbol:
+ {
+ register int confusing;
+ 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;
+
+ name = SYMBOL_NAME (obj);
+
+ if (p != end && (*p == '-' || *p == '+')) p++;
+ if (p == end)
+ confusing = 0;
+ /* If symbol name begins with a digit, and ends with a digit,
+ and contains nothing but digits and `e', it could be treated
+ as a number. So set CONFUSING.
+
+ Symbols that contain periods could also be taken as numbers,
+ but periods are always escaped, so we don't have to worry
+ about them here. */
+ else if (*p >= '0' && *p <= '9'
+ && end[-1] >= '0' && end[-1] <= '9')
+ {
+ while (p != end && ((*p >= '0' && *p <= '9')
+ /* Needed for \2e10. */
+ || *p == 'e'))
+ p++;
+ confusing = (end == p);
+ }
+ else
+ confusing = 0;
+
+ if (! NILP (Vprint_gensym) && !SYMBOL_INTERNED_P (obj))
+ {
+ PRINTCHAR ('#');
+ PRINTCHAR (':');
+ }
+
+ 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. */
+ FETCH_STRING_CHAR_ADVANCE (c, name, i, i_byte);
+ QUIT;
+
+ if (escapeflag)
+ {
+ if (c == '\"' || c == '\\' || c == '\''
+ || c == ';' || c == '#' || c == '(' || c == ')'
+ || c == ',' || c =='.' || c == '`'
+ || c == '[' || c == ']' || c == '?' || c <= 040
+ || confusing)
+ PRINTCHAR ('\\'), confusing = 0;
+ }
+ PRINTCHAR (c);
+ }
+ }
+ break;
+
+ case Lisp_Cons:
+ /* If deeper than spec'd depth, print placeholder. */
+ if (INTEGERP (Vprint_level)
+ && print_depth > XINT (Vprint_level))
+ strout ("...", -1, -1, printcharfun, 0);
+ else if (print_quoted && CONSP (XCDR (obj)) && NILP (XCDR (XCDR (obj)))
+ && (EQ (XCAR (obj), Qquote)))
+ {
+ PRINTCHAR ('\'');
+ print_object (XCAR (XCDR (obj)), printcharfun, escapeflag);
+ }
+ else if (print_quoted && CONSP (XCDR (obj)) && NILP (XCDR (XCDR (obj)))
+ && (EQ (XCAR (obj), Qfunction)))
+ {
+ PRINTCHAR ('#');
+ PRINTCHAR ('\'');
+ 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)
+ || EQ (XCAR (obj), Qcomma_dot))))
+ {
+ print_object (XCAR (obj), printcharfun, 0);
+ print_object (XCAR (XCDR (obj)), printcharfun, escapeflag);
+ }
+ 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);
+ }
+
+ {
+ int print_length, i;
+ Lisp_Object halftail = obj;
+
+ /* 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. */
+ if (NILP (Vprint_circle))
+ {
+ /* Simple but imcomplete way. */
+ if (i != 0 && EQ (obj, halftail))
+ {
+ sprintf (buf, " . #%d", i / 2);
+ strout (buf, -1, -1, printcharfun, 0);
+ goto end_of_list;
+ }
+ }
+ else
+ {
+ /* With the print-circle feature. */
+ if (i != 0)
+ {
+ int i;
+ for (i = 0; i < print_number_index; i++)
+ if (EQ (PRINT_NUMBER_OBJECT (Vprint_number_table, i),
+ obj))
+ {
+ if (NILP (PRINT_NUMBER_STATUS
(Vprint_number_table, i)))
+ {
+ strout (" . ", 3, 3, printcharfun, 0);
+ print_object (obj, printcharfun, escapeflag);
+ }
+ else
+ {
+ sprintf (buf, " . #%d#", i + 1);
+ strout (buf, -1, -1, printcharfun, 0);
+ }
+ goto end_of_list;
+ }
+ }
+ }
+
+ 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 (')');
+ }
+ break;
+
+ case Lisp_Vectorlike:
+ if (PROCESSP (obj))
+ {
+ if (escapeflag)
+ {
+ strout ("#<process ", -1, -1, printcharfun, 0);
+ print_string (XPROCESS (obj)->name, printcharfun);
+ PRINTCHAR ('>');
+ }
+ else
+ print_string (XPROCESS (obj)->name, printcharfun);
+ }
+ else if (BOOL_VECTOR_P (obj))
+ {
+ register int i;
+ register unsigned char c;
+ struct gcpro gcpro1;
+ int size_in_chars
+ = (XBOOL_VECTOR (obj)->size + BITS_PER_CHAR - 1) / BITS_PER_CHAR;
+
+ GCPRO1 (obj);
+
+ PRINTCHAR ('#');
+ PRINTCHAR ('&');
+ if (sizeof (int) == sizeof (EMACS_INT))
+ sprintf (buf, "%d", XBOOL_VECTOR (obj)->size);
+ else if (sizeof (long) == sizeof (EMACS_INT))
+ sprintf (buf, "%ld", XBOOL_VECTOR (obj)->size);
+ else
+ abort ();
+ strout (buf, -1, -1, printcharfun, 0);
+ PRINTCHAR ('\"');
+
+ /* 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++)
+ {
+ QUIT;
+ c = XBOOL_VECTOR (obj)->data[i];
+ if (! ASCII_BYTE_P (c))
+ {
+ sprintf (buf, "\\%03o", c);
+ strout (buf, -1, -1, printcharfun, 0);
+ }
+ else if (c == '\n' && print_escape_newlines)
+ {
+ PRINTCHAR ('\\');
+ PRINTCHAR ('n');
+ }
+ else if (c == '\f' && print_escape_newlines)
+ {
+ PRINTCHAR ('\\');
+ PRINTCHAR ('f');
+ }
+ else
+ {
+ if (c == '\"' || c == '\\')
+ PRINTCHAR ('\\');
+ PRINTCHAR (c);
+ }
+ }
+ PRINTCHAR ('\"');
+
+ UNGCPRO;
+ }
+ else if (SUBRP (obj))
+ {
+ strout ("#<subr ", -1, -1, printcharfun, 0);
+ strout (XSUBR (obj)->symbol_name, -1, -1, printcharfun, 0);
+ PRINTCHAR ('>');
+ }
+ else if (WINDOWP (obj))
+ {
+ strout ("#<window ", -1, -1, printcharfun, 0);
+ sprintf (buf, "%d", XFASTINT (XWINDOW (obj)->sequence_number));
+ strout (buf, -1, -1, printcharfun, 0);
+ if (!NILP (XWINDOW (obj)->buffer))
+ {
+ strout (" on ", -1, -1, printcharfun, 0);
+ print_string (XBUFFER (XWINDOW (obj)->buffer)->name,
printcharfun);
+ }
+ PRINTCHAR ('>');
+ }
+ else if (HASH_TABLE_P (obj))
+ {
+ struct Lisp_Hash_Table *h = XHASH_TABLE (obj);
+ strout ("#<hash-table", -1, -1, printcharfun, 0);
+ if (SYMBOLP (h->test))
+ {
+ PRINTCHAR (' ');
+ PRINTCHAR ('\'');
+ strout (SDATA (SYMBOL_NAME (h->test)), -1, -1, printcharfun, 0);
+ PRINTCHAR (' ');
+ strout (SDATA (SYMBOL_NAME (h->weak)), -1, -1, printcharfun, 0);
+ PRINTCHAR (' ');
+ sprintf (buf, "%d/%d", XFASTINT (h->count),
+ XVECTOR (h->next)->size);
+ strout (buf, -1, -1, printcharfun, 0);
+ }
+ sprintf (buf, " 0x%lx", (unsigned long) h);
+ strout (buf, -1, -1, printcharfun, 0);
+ PRINTCHAR ('>');
+ }
+ else if (BUFFERP (obj))
+ {
+ if (NILP (XBUFFER (obj)->name))
+ strout ("#<killed buffer>", -1, -1, printcharfun, 0);
+ else if (escapeflag)
+ {
+ strout ("#<buffer ", -1, -1, printcharfun, 0);
+ print_string (XBUFFER (obj)->name, printcharfun);
+ PRINTCHAR ('>');
+ }
+ else
+ print_string (XBUFFER (obj)->name, printcharfun);
+ }
+ else if (WINDOW_CONFIGURATIONP (obj))
+ {
+ strout ("#<window-configuration>", -1, -1, printcharfun, 0);
+ }
+ else if (FRAMEP (obj))
+ {
+ strout ((FRAME_LIVE_P (XFRAME (obj))
+ ? "#<frame " : "#<dead frame "),
+ -1, -1, printcharfun, 0);
+ print_string (XFRAME (obj)->name, printcharfun);
+ sprintf (buf, " 0x%lx", (unsigned long) (XFRAME (obj)));
+ strout (buf, -1, -1, printcharfun, 0);
+ PRINTCHAR ('>');
+ }
+ else
+ {
+ int size = XVECTOR (obj)->size;
+ if (COMPILEDP (obj))
+ {
+ PRINTCHAR ('#');
+ size &= PSEUDOVECTOR_SIZE_MASK;
+ }
+ if (CHAR_TABLE_P (obj) || SUB_CHAR_TABLE_P (obj))
+ {
+ /* We print a char-table as if it were a vector,
+ lumping the parent and default slots in with the
+ character slots. But we add #^ as a prefix. */
+ PRINTCHAR ('#');
+ PRINTCHAR ('^');
+ if (SUB_CHAR_TABLE_P (obj))
+ PRINTCHAR ('^');
+ size &= PSEUDOVECTOR_SIZE_MASK;
+ }
+ if (size & PSEUDOVECTOR_FLAG)
+ goto badtype;
+
+ PRINTCHAR ('[');
+ {
+ register int i;
+ register Lisp_Object tem;
+ int real_size = size;
+
+ /* Don't print more elements than the specified maximum. */
+ if (NATNUMP (Vprint_length)
+ && XFASTINT (Vprint_length) < size)
+ size = XFASTINT (Vprint_length);
+
+ for (i = 0; i < size; i++)
+ {
+ if (i) PRINTCHAR (' ');
+ tem = XVECTOR (obj)->contents[i];
+ print_object (tem, printcharfun, escapeflag);
+ }
+ if (size < real_size)
+ strout (" ...", 4, 4, printcharfun, 0);
+ }
+ PRINTCHAR (']');
+ }
+ break;
+
+ case Lisp_Misc:
+ switch (XMISCTYPE (obj))
+ {
+ case Lisp_Misc_Marker:
+ strout ("#<marker ", -1, -1, printcharfun, 0);
+ /* Do you think this is necessary? */
+ if (XMARKER (obj)->insertion_type != 0)
+ strout ("(moves after insertion) ", -1, -1, printcharfun, 0);
+ if (!(XMARKER (obj)->buffer))
+ strout ("in no buffer", -1, -1, printcharfun, 0);
+ else
+ {
+ sprintf (buf, "at %d", marker_position (obj));
+ strout (buf, -1, -1, printcharfun, 0);
+ strout (" in ", -1, -1, printcharfun, 0);
+ print_string (XMARKER (obj)->buffer->name, printcharfun);
+ }
+ PRINTCHAR ('>');
+ break;
+
+ case Lisp_Misc_Overlay:
+ strout ("#<overlay ", -1, -1, printcharfun, 0);
+ if (!(XMARKER (OVERLAY_START (obj))->buffer))
+ strout ("in no buffer", -1, -1, printcharfun, 0);
+ else
+ {
+ sprintf (buf, "from %d to %d in ",
+ marker_position (OVERLAY_START (obj)),
+ marker_position (OVERLAY_END (obj)));
+ strout (buf, -1, -1, printcharfun, 0);
+ print_string (XMARKER (OVERLAY_START (obj))->buffer->name,
+ printcharfun);
+ }
+ PRINTCHAR ('>');
+ break;
+
+ /* Remaining cases shouldn't happen in normal usage, but let's print
+ them anyway for the benefit of the debugger. */
+ case Lisp_Misc_Free:
+ strout ("#<misc free cell>", -1, -1, printcharfun, 0);
+ break;
+
+ case Lisp_Misc_Intfwd:
+ sprintf (buf, "#<intfwd to %d>", *XINTFWD (obj)->intvar);
+ strout (buf, -1, -1, printcharfun, 0);
+ break;
+
+ case Lisp_Misc_Boolfwd:
+ sprintf (buf, "#<boolfwd to %s>",
+ (*XBOOLFWD (obj)->boolvar ? "t" : "nil"));
+ strout (buf, -1, -1, printcharfun, 0);
+ break;
+
+ case Lisp_Misc_Objfwd:
+ strout ("#<objfwd to ", -1, -1, printcharfun, 0);
+ print_object (*XOBJFWD (obj)->objvar, printcharfun, escapeflag);
+ PRINTCHAR ('>');
+ break;
+
+ case Lisp_Misc_Buffer_Objfwd:
+ strout ("#<buffer_objfwd to ", -1, -1, printcharfun, 0);
+ print_object (PER_BUFFER_VALUE (current_buffer,
+ XBUFFER_OBJFWD (obj)->offset),
+ printcharfun, escapeflag);
+ PRINTCHAR ('>');
+ break;
+
+ case Lisp_Misc_Kboard_Objfwd:
+ strout ("#<kboard_objfwd to ", -1, -1, printcharfun, 0);
+ print_object (*(Lisp_Object *)((char *) current_kboard
+ + XKBOARD_OBJFWD (obj)->offset),
+ printcharfun, escapeflag);
+ PRINTCHAR ('>');
+ break;
+
+ case Lisp_Misc_Buffer_Local_Value:
+ strout ("#<buffer_local_value ", -1, -1, printcharfun, 0);
+ goto do_buffer_local;
+ case Lisp_Misc_Some_Buffer_Local_Value:
+ strout ("#<some_buffer_local_value ", -1, -1, printcharfun, 0);
+ do_buffer_local:
+ strout ("[realvalue] ", -1, -1, printcharfun, 0);
+ print_object (XBUFFER_LOCAL_VALUE (obj)->realvalue,
+ printcharfun, escapeflag);
+ if (XBUFFER_LOCAL_VALUE (obj)->found_for_buffer)
+ strout ("[local in buffer] ", -1, -1, printcharfun, 0);
+ else
+ strout ("[buffer] ", -1, -1, printcharfun, 0);
+ print_object (XBUFFER_LOCAL_VALUE (obj)->buffer,
+ printcharfun, escapeflag);
+ if (XBUFFER_LOCAL_VALUE (obj)->check_frame)
+ {
+ if (XBUFFER_LOCAL_VALUE (obj)->found_for_frame)
+ strout ("[local in frame] ", -1, -1, printcharfun, 0);
+ else
+ strout ("[frame] ", -1, -1, printcharfun, 0);
+ print_object (XBUFFER_LOCAL_VALUE (obj)->frame,
+ printcharfun, escapeflag);
+ }
+ strout ("[alist-elt] ", -1, -1, printcharfun, 0);
+ print_object (XCAR (XBUFFER_LOCAL_VALUE (obj)->cdr),
+ printcharfun, escapeflag);
+ strout ("[default-value] ", -1, -1, printcharfun, 0);
+ print_object (XCDR (XBUFFER_LOCAL_VALUE (obj)->cdr),
+ printcharfun, escapeflag);
+ PRINTCHAR ('>');
+ break;
+
+ default:
+ goto badtype;
+ }
+ break;
+
+ default:
+ badtype:
+ {
+ /* We're in trouble if this happens!
+ Probably should just abort () */
+ strout ("#<EMACS BUG: INVALID DATATYPE ", -1, -1, printcharfun, 0);
+ if (MISCP (obj))
+ sprintf (buf, "(MISC 0x%04x)", (int) XMISCTYPE (obj));
+ else if (VECTORLIKEP (obj))
+ sprintf (buf, "(PVEC 0x%08x)", (int) XVECTOR (obj)->size);
+ else
+ sprintf (buf, "(0x%02x)", (int) XTYPE (obj));
+ strout (buf, -1, -1, printcharfun, 0);
+ strout (" Save your buffers immediately and please report this bug>",
+ -1, -1, printcharfun, 0);
+ }
+ }
+
+ print_depth--;
+ }
+
+
+ /* Print a description of INTERVAL using PRINTCHARFUN.
+ This is part of printing a string that has text properties. */
+
+ void
+ print_interval (interval, printcharfun)
+ INTERVAL interval;
+ Lisp_Object printcharfun;
+ {
+ PRINTCHAR (' ');
+ print_object (make_number (interval->position), printcharfun, 1);
+ PRINTCHAR (' ');
+ print_object (make_number (interval->position + LENGTH (interval)),
+ printcharfun, 1);
+ PRINTCHAR (' ');
+ print_object (interval->plist, printcharfun, 1);
+ }
+
+
+ void
+ syms_of_print ()
+ {
+ Qtemp_buffer_setup_hook = intern ("temp-buffer-setup-hook");
+ staticpro (&Qtemp_buffer_setup_hook);
+
+ DEFVAR_LISP ("standard-output", &Vstandard_output,
+ 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);
+
+ DEFVAR_LISP ("float-output-format", &Vfloat_output_format,
+ 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);
+
+ DEFVAR_LISP ("print-length", &Vprint_length,
+ 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,
+ 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,
+ 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,
+ 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'.
+ When the output goes in a multibyte buffer, this feature is
+ enabled regardless of the value of the variable. */);
+ print_escape_nonascii = 0;
+
+ DEFVAR_BOOL ("print-escape-multibyte", &print_escape_multibyte,
+ 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,
+ 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,
+ 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,
+ 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,
+ 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,
+ 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 */
+ staticpro (&Vprin1_to_string_buffer);
+
+ defsubr (&Sprin1);
+ defsubr (&Sprin1_to_string);
+ defsubr (&Serror_message_string);
+ defsubr (&Sprinc);
+ defsubr (&Sprint);
+ defsubr (&Sterpri);
+ defsubr (&Swrite_char);
+ defsubr (&Sexternal_debugging_output);
+
+ Qexternal_debugging_output = intern ("external-debugging-output");
+ staticpro (&Qexternal_debugging_output);
+
+ Qprint_escape_newlines = intern ("print-escape-newlines");
+ staticpro (&Qprint_escape_newlines);
+
+ Qprint_escape_multibyte = intern ("print-escape-multibyte");
+ staticpro (&Qprint_escape_multibyte);
+
+ Qprint_escape_nonascii = intern ("print-escape-nonascii");
+ staticpro (&Qprint_escape_nonascii);
+
+ defsubr (&Swith_output_to_temp_buffer);
+ }
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- [Emacs-diffs] Changes to emacs/src/print.c [emacs-unicode-2],
Kenichi Handa <=