1 /* Lisp parsing and input streams.
3 Copyright (C) 1985-1989, 1993-1995, 1997-2016 Free Software Foundation,
6 This file is part of GNU Emacs.
8 GNU Emacs is free software: you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation, either version 3 of the License, or (at
11 your option) any later version.
13 GNU Emacs is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */
21 /* Tell globals.h to define tables needed by init_obarray. */
22 #define DEFINE_SYMBOLS
27 #include <sys/types.h>
32 #include <stat-time.h>
34 #include "dispextern.h"
35 #include "intervals.h"
36 #include "character.h"
43 #include "termhooks.h"
44 #include "blockinput.h"
49 #if __DJGPP__ == 2 && __DJGPP_MINOR__ < 5
50 # define INFINITY __builtin_inf()
51 # define NAN __builtin_nan("")
63 #endif /* HAVE_SETLOCALE */
68 #define file_offset off_t
69 #define file_tell ftello
71 #define file_offset long
72 #define file_tell ftell
75 /* The association list of objects read with the #n=object form.
76 Each member of the list has the form (n . object), and is used to
77 look up the object for the corresponding #n# construct.
78 It must be set to nil before all top-level calls to read0. */
79 static Lisp_Object read_objects
;
81 /* File for get_file_char to read from. Use by load. */
82 static FILE *instream
;
84 /* For use within read-from-string (this reader is non-reentrant!!) */
85 static ptrdiff_t read_from_string_index
;
86 static ptrdiff_t read_from_string_index_byte
;
87 static ptrdiff_t read_from_string_limit
;
89 /* Number of characters read in the current call to Fread or
91 static EMACS_INT readchar_count
;
93 /* This contains the last string skipped with #@. */
94 static char *saved_doc_string
;
95 /* Length of buffer allocated in saved_doc_string. */
96 static ptrdiff_t saved_doc_string_size
;
97 /* Length of actual data in saved_doc_string. */
98 static ptrdiff_t saved_doc_string_length
;
99 /* This is the file position that string came from. */
100 static file_offset saved_doc_string_position
;
102 /* This contains the previous string skipped with #@.
103 We copy it from saved_doc_string when a new string
104 is put in saved_doc_string. */
105 static char *prev_saved_doc_string
;
106 /* Length of buffer allocated in prev_saved_doc_string. */
107 static ptrdiff_t prev_saved_doc_string_size
;
108 /* Length of actual data in prev_saved_doc_string. */
109 static ptrdiff_t prev_saved_doc_string_length
;
110 /* This is the file position that string came from. */
111 static file_offset prev_saved_doc_string_position
;
113 /* True means inside a new-style backquote
114 with no surrounding parentheses.
115 Fread initializes this to false, so we need not specbind it
116 or worry about what happens to it when there is an error. */
117 static bool new_backquote_flag
;
119 /* A list of file names for files being loaded in Fload. Used to
120 check for recursive loads. */
122 static Lisp_Object Vloads_in_progress
;
124 static int read_emacs_mule_char (int, int (*) (int, Lisp_Object
),
127 static void readevalloop (Lisp_Object
, FILE *, Lisp_Object
, bool,
128 Lisp_Object
, Lisp_Object
,
129 Lisp_Object
, Lisp_Object
);
131 /* Functions that read one byte from the current source READCHARFUN
132 or unreads one byte. If the integer argument C is -1, it returns
133 one read byte, or -1 when there's no more byte in the source. If C
134 is 0 or positive, it unreads C, and the return value is not
137 static int readbyte_for_lambda (int, Lisp_Object
);
138 static int readbyte_from_file (int, Lisp_Object
);
139 static int readbyte_from_string (int, Lisp_Object
);
141 /* Handle unreading and rereading of characters.
142 Write READCHAR to read a character,
143 UNREAD(c) to unread c to be read again.
145 These macros correctly read/unread multibyte characters. */
147 #define READCHAR readchar (readcharfun, NULL)
148 #define UNREAD(c) unreadchar (readcharfun, c)
150 /* Same as READCHAR but set *MULTIBYTE to the multibyteness of the source. */
151 #define READCHAR_REPORT_MULTIBYTE(multibyte) readchar (readcharfun, multibyte)
153 /* When READCHARFUN is Qget_file_char, Qget_emacs_mule_file_char,
154 Qlambda, or a cons, we use this to keep an unread character because
155 a file stream can't handle multibyte-char unreading. The value -1
156 means that there's no unread character. */
157 static int unread_char
;
160 readchar (Lisp_Object readcharfun
, bool *multibyte
)
164 int (*readbyte
) (int, Lisp_Object
);
165 unsigned char buf
[MAX_MULTIBYTE_LENGTH
];
167 bool emacs_mule_encoding
= 0;
174 if (BUFFERP (readcharfun
))
176 register struct buffer
*inbuffer
= XBUFFER (readcharfun
);
178 ptrdiff_t pt_byte
= BUF_PT_BYTE (inbuffer
);
180 if (! BUFFER_LIVE_P (inbuffer
))
183 if (pt_byte
>= BUF_ZV_BYTE (inbuffer
))
186 if (! NILP (BVAR (inbuffer
, enable_multibyte_characters
)))
188 /* Fetch the character code from the buffer. */
189 unsigned char *p
= BUF_BYTE_ADDRESS (inbuffer
, pt_byte
);
190 BUF_INC_POS (inbuffer
, pt_byte
);
197 c
= BUF_FETCH_BYTE (inbuffer
, pt_byte
);
198 if (! ASCII_CHAR_P (c
))
199 c
= BYTE8_TO_CHAR (c
);
202 SET_BUF_PT_BOTH (inbuffer
, BUF_PT (inbuffer
) + 1, pt_byte
);
206 if (MARKERP (readcharfun
))
208 register struct buffer
*inbuffer
= XMARKER (readcharfun
)->buffer
;
210 ptrdiff_t bytepos
= marker_byte_position (readcharfun
);
212 if (bytepos
>= BUF_ZV_BYTE (inbuffer
))
215 if (! NILP (BVAR (inbuffer
, enable_multibyte_characters
)))
217 /* Fetch the character code from the buffer. */
218 unsigned char *p
= BUF_BYTE_ADDRESS (inbuffer
, bytepos
);
219 BUF_INC_POS (inbuffer
, bytepos
);
226 c
= BUF_FETCH_BYTE (inbuffer
, bytepos
);
227 if (! ASCII_CHAR_P (c
))
228 c
= BYTE8_TO_CHAR (c
);
232 XMARKER (readcharfun
)->bytepos
= bytepos
;
233 XMARKER (readcharfun
)->charpos
++;
238 if (EQ (readcharfun
, Qlambda
))
240 readbyte
= readbyte_for_lambda
;
244 if (EQ (readcharfun
, Qget_file_char
))
246 readbyte
= readbyte_from_file
;
250 if (STRINGP (readcharfun
))
252 if (read_from_string_index
>= read_from_string_limit
)
254 else if (STRING_MULTIBYTE (readcharfun
))
258 FETCH_STRING_CHAR_ADVANCE_NO_CHECK (c
, readcharfun
,
259 read_from_string_index
,
260 read_from_string_index_byte
);
264 c
= SREF (readcharfun
, read_from_string_index_byte
);
265 read_from_string_index
++;
266 read_from_string_index_byte
++;
271 if (CONSP (readcharfun
) && STRINGP (XCAR (readcharfun
)))
273 /* This is the case that read_vector is reading from a unibyte
274 string that contains a byte sequence previously skipped
275 because of #@NUMBER. The car part of readcharfun is that
276 string, and the cdr part is a value of readcharfun given to
278 readbyte
= readbyte_from_string
;
279 if (EQ (XCDR (readcharfun
), Qget_emacs_mule_file_char
))
280 emacs_mule_encoding
= 1;
284 if (EQ (readcharfun
, Qget_emacs_mule_file_char
))
286 readbyte
= readbyte_from_file
;
287 emacs_mule_encoding
= 1;
291 tem
= call0 (readcharfun
);
298 if (unread_char
>= 0)
304 c
= (*readbyte
) (-1, readcharfun
);
309 if (ASCII_CHAR_P (c
))
311 if (emacs_mule_encoding
)
312 return read_emacs_mule_char (c
, readbyte
, readcharfun
);
315 len
= BYTES_BY_CHAR_HEAD (c
);
318 c
= (*readbyte
) (-1, readcharfun
);
319 if (c
< 0 || ! TRAILING_CODE_P (c
))
322 (*readbyte
) (buf
[i
], readcharfun
);
323 return BYTE8_TO_CHAR (buf
[0]);
327 return STRING_CHAR (buf
);
330 #define FROM_FILE_P(readcharfun) \
331 (EQ (readcharfun, Qget_file_char) \
332 || EQ (readcharfun, Qget_emacs_mule_file_char))
335 skip_dyn_bytes (Lisp_Object readcharfun
, ptrdiff_t n
)
337 if (FROM_FILE_P (readcharfun
))
339 block_input (); /* FIXME: Not sure if it's needed. */
340 fseek (instream
, n
, SEEK_CUR
);
344 { /* We're not reading directly from a file. In that case, it's difficult
345 to reliably count bytes, since these are usually meant for the file's
346 encoding, whereas we're now typically in the internal encoding.
347 But luckily, skip_dyn_bytes is used to skip over a single
348 dynamic-docstring (or dynamic byte-code) which is always quoted such
349 that \037 is the final char. */
353 } while (c
>= 0 && c
!= '\037');
358 skip_dyn_eof (Lisp_Object readcharfun
)
360 if (FROM_FILE_P (readcharfun
))
362 block_input (); /* FIXME: Not sure if it's needed. */
363 fseek (instream
, 0, SEEK_END
);
367 while (READCHAR
>= 0);
370 /* Unread the character C in the way appropriate for the stream READCHARFUN.
371 If the stream is a user function, call it with the char as argument. */
374 unreadchar (Lisp_Object readcharfun
, int c
)
378 /* Don't back up the pointer if we're unreading the end-of-input mark,
379 since readchar didn't advance it when we read it. */
381 else if (BUFFERP (readcharfun
))
383 struct buffer
*b
= XBUFFER (readcharfun
);
384 ptrdiff_t charpos
= BUF_PT (b
);
385 ptrdiff_t bytepos
= BUF_PT_BYTE (b
);
387 if (! NILP (BVAR (b
, enable_multibyte_characters
)))
388 BUF_DEC_POS (b
, bytepos
);
392 SET_BUF_PT_BOTH (b
, charpos
- 1, bytepos
);
394 else if (MARKERP (readcharfun
))
396 struct buffer
*b
= XMARKER (readcharfun
)->buffer
;
397 ptrdiff_t bytepos
= XMARKER (readcharfun
)->bytepos
;
399 XMARKER (readcharfun
)->charpos
--;
400 if (! NILP (BVAR (b
, enable_multibyte_characters
)))
401 BUF_DEC_POS (b
, bytepos
);
405 XMARKER (readcharfun
)->bytepos
= bytepos
;
407 else if (STRINGP (readcharfun
))
409 read_from_string_index
--;
410 read_from_string_index_byte
411 = string_char_to_byte (readcharfun
, read_from_string_index
);
413 else if (CONSP (readcharfun
) && STRINGP (XCAR (readcharfun
)))
417 else if (EQ (readcharfun
, Qlambda
))
421 else if (FROM_FILE_P (readcharfun
))
426 call1 (readcharfun
, make_number (c
));
430 readbyte_for_lambda (int c
, Lisp_Object readcharfun
)
432 return read_bytecode_char (c
>= 0);
437 readbyte_from_file (int c
, Lisp_Object readcharfun
)
442 ungetc (c
, instream
);
450 /* Interrupted reads have been observed while reading over the network. */
451 while (c
== EOF
&& ferror (instream
) && errno
== EINTR
)
462 return (c
== EOF
? -1 : c
);
466 readbyte_from_string (int c
, Lisp_Object readcharfun
)
468 Lisp_Object string
= XCAR (readcharfun
);
472 read_from_string_index
--;
473 read_from_string_index_byte
474 = string_char_to_byte (string
, read_from_string_index
);
477 if (read_from_string_index
>= read_from_string_limit
)
480 FETCH_STRING_CHAR_ADVANCE (c
, string
,
481 read_from_string_index
,
482 read_from_string_index_byte
);
487 /* Read one non-ASCII character from INSTREAM. The character is
488 encoded in `emacs-mule' and the first byte is already read in
492 read_emacs_mule_char (int c
, int (*readbyte
) (int, Lisp_Object
), Lisp_Object readcharfun
)
494 /* Emacs-mule coding uses at most 4-byte for one character. */
495 unsigned char buf
[4];
496 int len
= emacs_mule_bytes
[c
];
497 struct charset
*charset
;
502 /* C is not a valid leading-code of `emacs-mule'. */
503 return BYTE8_TO_CHAR (c
);
509 c
= (*readbyte
) (-1, readcharfun
);
513 (*readbyte
) (buf
[i
], readcharfun
);
514 return BYTE8_TO_CHAR (buf
[0]);
521 charset
= CHARSET_FROM_ID (emacs_mule_charset
[buf
[0]]);
522 code
= buf
[1] & 0x7F;
526 if (buf
[0] == EMACS_MULE_LEADING_CODE_PRIVATE_11
527 || buf
[0] == EMACS_MULE_LEADING_CODE_PRIVATE_12
)
529 charset
= CHARSET_FROM_ID (emacs_mule_charset
[buf
[1]]);
530 code
= buf
[2] & 0x7F;
534 charset
= CHARSET_FROM_ID (emacs_mule_charset
[buf
[0]]);
535 code
= ((buf
[1] << 8) | buf
[2]) & 0x7F7F;
540 charset
= CHARSET_FROM_ID (emacs_mule_charset
[buf
[1]]);
541 code
= ((buf
[2] << 8) | buf
[3]) & 0x7F7F;
543 c
= DECODE_CHAR (charset
, code
);
545 Fsignal (Qinvalid_read_syntax
,
546 list1 (build_string ("invalid multibyte form")));
551 static Lisp_Object
read_internal_start (Lisp_Object
, Lisp_Object
,
553 static Lisp_Object
read0 (Lisp_Object
);
554 static Lisp_Object
read1 (Lisp_Object
, int *, bool);
556 static Lisp_Object
read_list (bool, Lisp_Object
);
557 static Lisp_Object
read_vector (Lisp_Object
, bool);
559 static Lisp_Object
substitute_object_recurse (Lisp_Object
, Lisp_Object
,
561 static void substitute_object_in_subtree (Lisp_Object
,
563 static void substitute_in_interval (INTERVAL
, Lisp_Object
);
566 /* Get a character from the tty. */
568 /* Read input events until we get one that's acceptable for our purposes.
570 If NO_SWITCH_FRAME, switch-frame events are stashed
571 until we get a character we like, and then stuffed into
574 If ASCII_REQUIRED, check function key events to see
575 if the unmodified version of the symbol has a Qascii_character
576 property, and use that character, if present.
578 If ERROR_NONASCII, signal an error if the input we
579 get isn't an ASCII character with modifiers. If it's false but
580 ASCII_REQUIRED is true, just re-read until we get an ASCII
583 If INPUT_METHOD, invoke the current input method
584 if the character warrants that.
586 If SECONDS is a number, wait that many seconds for input, and
587 return Qnil if no input arrives within that time. */
590 read_filtered_event (bool no_switch_frame
, bool ascii_required
,
591 bool error_nonascii
, bool input_method
, Lisp_Object seconds
)
593 Lisp_Object val
, delayed_switch_frame
;
594 struct timespec end_time
;
596 #ifdef HAVE_WINDOW_SYSTEM
597 if (display_hourglass_p
)
601 delayed_switch_frame
= Qnil
;
603 /* Compute timeout. */
604 if (NUMBERP (seconds
))
606 double duration
= extract_float (seconds
);
607 struct timespec wait_time
= dtotimespec (duration
);
608 end_time
= timespec_add (current_timespec (), wait_time
);
611 /* Read until we get an acceptable event. */
614 val
= read_char (0, Qnil
, (input_method
? Qnil
: Qt
), 0,
615 NUMBERP (seconds
) ? &end_time
: NULL
);
616 while (INTEGERP (val
) && XINT (val
) == -2); /* wrong_kboard_jmpbuf */
621 /* `switch-frame' events are put off until after the next ASCII
622 character. This is better than signaling an error just because
623 the last characters were typed to a separate minibuffer frame,
624 for example. Eventually, some code which can deal with
625 switch-frame events will read it and process it. */
627 && EVENT_HAS_PARAMETERS (val
)
628 && EQ (EVENT_HEAD_KIND (EVENT_HEAD (val
)), Qswitch_frame
))
630 delayed_switch_frame
= val
;
634 if (ascii_required
&& !(NUMBERP (seconds
) && NILP (val
)))
636 /* Convert certain symbols to their ASCII equivalents. */
639 Lisp_Object tem
, tem1
;
640 tem
= Fget (val
, Qevent_symbol_element_mask
);
643 tem1
= Fget (Fcar (tem
), Qascii_character
);
644 /* Merge this symbol's modifier bits
645 with the ASCII equivalent of its basic code. */
647 XSETFASTINT (val
, XINT (tem1
) | XINT (Fcar (Fcdr (tem
))));
651 /* If we don't have a character now, deal with it appropriately. */
656 Vunread_command_events
= list1 (val
);
657 error ("Non-character input-event");
664 if (! NILP (delayed_switch_frame
))
665 unread_switch_frame
= delayed_switch_frame
;
669 #ifdef HAVE_WINDOW_SYSTEM
670 if (display_hourglass_p
)
679 DEFUN ("read-char", Fread_char
, Sread_char
, 0, 3, 0,
680 doc
: /* Read a character from the command input (keyboard or macro).
681 It is returned as a number.
682 If the character has modifiers, they are resolved and reflected to the
683 character code if possible (e.g. C-SPC -> 0).
685 If the user generates an event which is not a character (i.e. a mouse
686 click or function key event), `read-char' signals an error. As an
687 exception, switch-frame events are put off until non-character events
689 If you want to read non-character events, or ignore them, call
690 `read-event' or `read-char-exclusive' instead.
692 If the optional argument PROMPT is non-nil, display that as a prompt.
693 If the optional argument INHERIT-INPUT-METHOD is non-nil and some
694 input method is turned on in the current buffer, that input method
695 is used for reading a character.
696 If the optional argument SECONDS is non-nil, it should be a number
697 specifying the maximum number of seconds to wait for input. If no
698 input arrives in that time, return nil. SECONDS may be a
699 floating-point value. */)
700 (Lisp_Object prompt
, Lisp_Object inherit_input_method
, Lisp_Object seconds
)
705 message_with_string ("%s", prompt
, 0);
706 val
= read_filtered_event (1, 1, 1, ! NILP (inherit_input_method
), seconds
);
708 return (NILP (val
) ? Qnil
709 : make_number (char_resolve_modifier_mask (XINT (val
))));
712 DEFUN ("read-event", Fread_event
, Sread_event
, 0, 3, 0,
713 doc
: /* Read an event object from the input stream.
714 If the optional argument PROMPT is non-nil, display that as a prompt.
715 If the optional argument INHERIT-INPUT-METHOD is non-nil and some
716 input method is turned on in the current buffer, that input method
717 is used for reading a character.
718 If the optional argument SECONDS is non-nil, it should be a number
719 specifying the maximum number of seconds to wait for input. If no
720 input arrives in that time, return nil. SECONDS may be a
721 floating-point value. */)
722 (Lisp_Object prompt
, Lisp_Object inherit_input_method
, Lisp_Object seconds
)
725 message_with_string ("%s", prompt
, 0);
726 return read_filtered_event (0, 0, 0, ! NILP (inherit_input_method
), seconds
);
729 DEFUN ("read-char-exclusive", Fread_char_exclusive
, Sread_char_exclusive
, 0, 3, 0,
730 doc
: /* Read a character from the command input (keyboard or macro).
731 It is returned as a number. Non-character events are ignored.
732 If the character has modifiers, they are resolved and reflected to the
733 character code if possible (e.g. C-SPC -> 0).
735 If the optional argument PROMPT is non-nil, display that as a prompt.
736 If the optional argument INHERIT-INPUT-METHOD is non-nil and some
737 input method is turned on in the current buffer, that input method
738 is used for reading a character.
739 If the optional argument SECONDS is non-nil, it should be a number
740 specifying the maximum number of seconds to wait for input. If no
741 input arrives in that time, return nil. SECONDS may be a
742 floating-point value. */)
743 (Lisp_Object prompt
, Lisp_Object inherit_input_method
, Lisp_Object seconds
)
748 message_with_string ("%s", prompt
, 0);
750 val
= read_filtered_event (1, 1, 0, ! NILP (inherit_input_method
), seconds
);
752 return (NILP (val
) ? Qnil
753 : make_number (char_resolve_modifier_mask (XINT (val
))));
756 DEFUN ("get-file-char", Fget_file_char
, Sget_file_char
, 0, 0, 0,
757 doc
: /* Don't use this yourself. */)
760 register Lisp_Object val
;
762 XSETINT (val
, getc (instream
));
770 /* Return true if the lisp code read using READCHARFUN defines a non-nil
771 `lexical-binding' file variable. After returning, the stream is
772 positioned following the first line, if it is a comment or #! line,
773 otherwise nothing is read. */
776 lisp_file_lexically_bound_p (Lisp_Object readcharfun
)
789 while (ch
!= '\n' && ch
!= EOF
)
791 if (ch
== '\n') ch
= READCHAR
;
792 /* It is OK to leave the position after a #! line, since
793 that is what read1 does. */
797 /* The first line isn't a comment, just give up. */
803 /* Look for an appropriate file-variable in the first line. */
807 NOMINAL
, AFTER_FIRST_DASH
, AFTER_ASTERIX
808 } beg_end_state
= NOMINAL
;
809 bool in_file_vars
= 0;
811 #define UPDATE_BEG_END_STATE(ch) \
812 if (beg_end_state == NOMINAL) \
813 beg_end_state = (ch == '-' ? AFTER_FIRST_DASH : NOMINAL); \
814 else if (beg_end_state == AFTER_FIRST_DASH) \
815 beg_end_state = (ch == '*' ? AFTER_ASTERIX : NOMINAL); \
816 else if (beg_end_state == AFTER_ASTERIX) \
819 in_file_vars = !in_file_vars; \
820 beg_end_state = NOMINAL; \
823 /* Skip until we get to the file vars, if any. */
827 UPDATE_BEG_END_STATE (ch
);
829 while (!in_file_vars
&& ch
!= '\n' && ch
!= EOF
);
833 char var
[100], val
[100];
838 /* Read a variable name. */
839 while (ch
== ' ' || ch
== '\t')
843 while (ch
!= ':' && ch
!= '\n' && ch
!= EOF
&& in_file_vars
)
845 if (i
< sizeof var
- 1)
847 UPDATE_BEG_END_STATE (ch
);
851 /* Stop scanning if no colon was found before end marker. */
852 if (!in_file_vars
|| ch
== '\n' || ch
== EOF
)
855 while (i
> 0 && (var
[i
- 1] == ' ' || var
[i
- 1] == '\t'))
861 /* Read a variable value. */
864 while (ch
== ' ' || ch
== '\t')
868 while (ch
!= ';' && ch
!= '\n' && ch
!= EOF
&& in_file_vars
)
870 if (i
< sizeof val
- 1)
872 UPDATE_BEG_END_STATE (ch
);
876 /* The value was terminated by an end-marker, which remove. */
878 while (i
> 0 && (val
[i
- 1] == ' ' || val
[i
- 1] == '\t'))
882 if (strcmp (var
, "lexical-binding") == 0)
885 rv
= (strcmp (val
, "nil") != 0);
891 while (ch
!= '\n' && ch
!= EOF
)
898 /* Value is a version number of byte compiled code if the file
899 associated with file descriptor FD is a compiled Lisp file that's
900 safe to load. Only files compiled with Emacs are safe to load.
901 Files compiled with XEmacs can lead to a crash in Fbyte_code
902 because of an incompatible change in the byte compiler. */
905 safe_to_load_version (int fd
)
911 /* Read the first few bytes from the file, and look for a line
912 specifying the byte compiler version used. */
913 nbytes
= emacs_read (fd
, buf
, sizeof buf
);
916 /* Skip to the next newline, skipping over the initial `ELC'
917 with NUL bytes following it, but note the version. */
918 for (i
= 0; i
< nbytes
&& buf
[i
] != '\n'; ++i
)
923 || fast_c_string_match_ignore_case (Vbytecomp_version_regexp
,
924 buf
+ i
, nbytes
- i
) < 0)
928 lseek (fd
, 0, SEEK_SET
);
933 /* Callback for record_unwind_protect. Restore the old load list OLD,
934 after loading a file successfully. */
937 record_load_unwind (Lisp_Object old
)
939 Vloads_in_progress
= old
;
942 /* This handler function is used via internal_condition_case_1. */
945 load_error_handler (Lisp_Object data
)
951 load_warn_old_style_backquotes (Lisp_Object file
)
953 if (!NILP (Vold_style_backquotes
))
955 AUTO_STRING (format
, "Loading `%s': old-style backquotes detected!");
956 CALLN (Fmessage
, format
, file
);
960 DEFUN ("get-load-suffixes", Fget_load_suffixes
, Sget_load_suffixes
, 0, 0, 0,
961 doc
: /* Return the suffixes that `load' should try if a suffix is \
963 This uses the variables `load-suffixes' and `load-file-rep-suffixes'. */)
966 Lisp_Object lst
= Qnil
, suffixes
= Vload_suffixes
, suffix
, ext
;
967 while (CONSP (suffixes
))
969 Lisp_Object exts
= Vload_file_rep_suffixes
;
970 suffix
= XCAR (suffixes
);
971 suffixes
= XCDR (suffixes
);
976 lst
= Fcons (concat2 (suffix
, ext
), lst
);
979 return Fnreverse (lst
);
982 /* Returns true if STRING ends with SUFFIX */
984 suffix_p (Lisp_Object string
, const char *suffix
)
986 ptrdiff_t suffix_len
= strlen (suffix
);
987 ptrdiff_t string_len
= SBYTES (string
);
989 return string_len
>= suffix_len
&& !strcmp (SSDATA (string
) + string_len
- suffix_len
, suffix
);
992 DEFUN ("load", Fload
, Sload
, 1, 5, 0,
993 doc
: /* Execute a file of Lisp code named FILE.
994 First try FILE with `.elc' appended, then try with `.el', then try
995 with a system-dependent suffix of dynamic modules (see `load-suffixes'),
996 then try FILE unmodified (the exact suffixes in the exact order are
997 determined by `load-suffixes'). Environment variable references in
998 FILE are replaced with their values by calling `substitute-in-file-name'.
999 This function searches the directories in `load-path'.
1001 If optional second arg NOERROR is non-nil,
1002 report no error if FILE doesn't exist.
1003 Print messages at start and end of loading unless
1004 optional third arg NOMESSAGE is non-nil (but `force-load-messages'
1006 If optional fourth arg NOSUFFIX is non-nil, don't try adding
1007 suffixes to the specified name FILE.
1008 If optional fifth arg MUST-SUFFIX is non-nil, insist on
1009 the suffix `.elc' or `.el' or the module suffix; don't accept just
1010 FILE unless it ends in one of those suffixes or includes a directory name.
1012 If NOSUFFIX is nil, then if a file could not be found, try looking for
1013 a different representation of the file by adding non-empty suffixes to
1014 its name, before trying another file. Emacs uses this feature to find
1015 compressed versions of files when Auto Compression mode is enabled.
1016 If NOSUFFIX is non-nil, disable this feature.
1018 The suffixes that this function tries out, when NOSUFFIX is nil, are
1019 given by the return value of `get-load-suffixes' and the values listed
1020 in `load-file-rep-suffixes'. If MUST-SUFFIX is non-nil, only the
1021 return value of `get-load-suffixes' is used, i.e. the file name is
1022 required to have a non-empty suffix.
1024 When searching suffixes, this function normally stops at the first
1025 one that exists. If the option `load-prefer-newer' is non-nil,
1026 however, it tries all suffixes, and uses whichever file is the newest.
1028 Loading a file records its definitions, and its `provide' and
1029 `require' calls, in an element of `load-history' whose
1030 car is the file name loaded. See `load-history'.
1032 While the file is in the process of being loaded, the variable
1033 `load-in-progress' is non-nil and the variable `load-file-name'
1034 is bound to the file's name.
1036 Return t if the file exists and loads successfully. */)
1037 (Lisp_Object file
, Lisp_Object noerror
, Lisp_Object nomessage
,
1038 Lisp_Object nosuffix
, Lisp_Object must_suffix
)
1042 int fd_index UNINIT
;
1043 ptrdiff_t count
= SPECPDL_INDEX ();
1044 Lisp_Object found
, efound
, hist_file_name
;
1045 /* True means we printed the ".el is newer" message. */
1047 /* True means we are loading a compiled file. */
1049 Lisp_Object handler
;
1051 const char *fmode
= "r" FOPEN_TEXT
;
1054 CHECK_STRING (file
);
1056 /* If file name is magic, call the handler. */
1057 /* This shouldn't be necessary any more now that `openp' handles it right.
1058 handler = Ffind_file_name_handler (file, Qload);
1059 if (!NILP (handler))
1060 return call5 (handler, Qload, file, noerror, nomessage, nosuffix); */
1062 /* The presence of this call is the result of a historical accident:
1063 it used to be in every file-operation and when it got removed
1064 everywhere, it accidentally stayed here. Since then, enough people
1065 supposedly have things like (load "$PROJECT/foo.el") in their .emacs
1066 that it seemed risky to remove. */
1067 if (! NILP (noerror
))
1069 file
= internal_condition_case_1 (Fsubstitute_in_file_name
, file
,
1070 Qt
, load_error_handler
);
1075 file
= Fsubstitute_in_file_name (file
);
1077 /* Avoid weird lossage with null string as arg,
1078 since it would try to load a directory as a Lisp file. */
1079 if (SCHARS (file
) == 0)
1086 Lisp_Object suffixes
;
1089 if (! NILP (must_suffix
))
1091 /* Don't insist on adding a suffix if FILE already ends with one. */
1092 if (suffix_p (file
, ".el")
1093 || suffix_p (file
, ".elc")
1095 || suffix_p (file
, MODULES_SUFFIX
)
1099 /* Don't insist on adding a suffix
1100 if the argument includes a directory name. */
1101 else if (! NILP (Ffile_name_directory (file
)))
1105 if (!NILP (nosuffix
))
1109 suffixes
= Fget_load_suffixes ();
1110 if (NILP (must_suffix
))
1111 suffixes
= CALLN (Fappend
, suffixes
, Vload_file_rep_suffixes
);
1114 fd
= openp (Vload_path
, file
, suffixes
, &found
, Qnil
, load_prefer_newer
);
1120 report_file_error ("Cannot open load file", file
);
1124 /* Tell startup.el whether or not we found the user's init file. */
1125 if (EQ (Qt
, Vuser_init_file
))
1126 Vuser_init_file
= found
;
1128 /* If FD is -2, that means openp found a magic file. */
1131 if (NILP (Fequal (found
, file
)))
1132 /* If FOUND is a different file name from FILE,
1133 find its handler even if we have already inhibited
1134 the `load' operation on FILE. */
1135 handler
= Ffind_file_name_handler (found
, Qt
);
1137 handler
= Ffind_file_name_handler (found
, Qload
);
1138 if (! NILP (handler
))
1139 return call5 (handler
, Qload
, found
, noerror
, nomessage
, Qt
);
1141 /* Tramp has to deal with semi-broken packages that prepend
1142 drive letters to remote files. For that reason, Tramp
1143 catches file operations that test for file existence, which
1144 makes openp think X:/foo.elc files are remote. However,
1145 Tramp does not catch `load' operations for such files, so we
1146 end up with a nil as the `load' handler above. If we would
1147 continue with fd = -2, we will behave wrongly, and in
1148 particular try reading a .elc file in the "rt" mode instead
1149 of "rb". See bug #9311 for the results. To work around
1150 this, we try to open the file locally, and go with that if it
1152 fd
= emacs_open (SSDATA (ENCODE_FILE (found
)), O_RDONLY
, 0);
1160 fd_index
= SPECPDL_INDEX ();
1161 record_unwind_protect_int (close_file_unwind
, fd
);
1165 if (suffix_p (found
, MODULES_SUFFIX
))
1166 return unbind_to (count
, Fmodule_load (found
));
1169 /* Check if we're stuck in a recursive load cycle.
1171 2000-09-21: It's not possible to just check for the file loaded
1172 being a member of Vloads_in_progress. This fails because of the
1173 way the byte compiler currently works; `provide's are not
1174 evaluated, see font-lock.el/jit-lock.el as an example. This
1175 leads to a certain amount of ``normal'' recursion.
1177 Also, just loading a file recursively is not always an error in
1178 the general case; the second load may do something different. */
1182 for (tem
= Vloads_in_progress
; CONSP (tem
); tem
= XCDR (tem
))
1183 if (!NILP (Fequal (found
, XCAR (tem
))) && (++load_count
> 3))
1184 signal_error ("Recursive load", Fcons (found
, Vloads_in_progress
));
1185 record_unwind_protect (record_load_unwind
, Vloads_in_progress
);
1186 Vloads_in_progress
= Fcons (found
, Vloads_in_progress
);
1189 /* All loads are by default dynamic, unless the file itself specifies
1190 otherwise using a file-variable in the first line. This is bound here
1191 so that it takes effect whether or not we use
1192 Vload_source_file_function. */
1193 specbind (Qlexical_binding
, Qnil
);
1195 /* Get the name for load-history. */
1196 hist_file_name
= (! NILP (Vpurify_flag
)
1197 ? concat2 (Ffile_name_directory (file
),
1198 Ffile_name_nondirectory (found
))
1203 /* Check for the presence of old-style quotes and warn about them. */
1204 specbind (Qold_style_backquotes
, Qnil
);
1205 record_unwind_protect (load_warn_old_style_backquotes
, file
);
1208 if ((is_elc
= suffix_p (found
, ".elc")) != 0
1209 /* version = 1 means the file is empty, in which case we can
1210 treat it as not byte-compiled. */
1211 || (fd
>= 0 && (version
= safe_to_load_version (fd
)) > 1))
1212 /* Load .elc files directly, but not when they are
1213 remote and have no handler! */
1221 && ! (version
= safe_to_load_version (fd
)))
1224 if (!load_dangerous_libraries
)
1225 error ("File `%s' was not compiled in Emacs", SDATA (found
));
1226 else if (!NILP (nomessage
) && !force_load_messages
)
1227 message_with_string ("File `%s' not compiled in Emacs", found
, 1);
1232 efound
= ENCODE_FILE (found
);
1233 fmode
= "r" FOPEN_BINARY
;
1235 /* openp already checked for newness, no point doing it again.
1236 FIXME would be nice to get a message when openp
1237 ignores suffix order due to load_prefer_newer. */
1238 if (!load_prefer_newer
&& is_elc
)
1240 result
= stat (SSDATA (efound
), &s1
);
1243 SSET (efound
, SBYTES (efound
) - 1, 0);
1244 result
= stat (SSDATA (efound
), &s2
);
1245 SSET (efound
, SBYTES (efound
) - 1, 'c');
1249 && timespec_cmp (get_stat_mtime (&s1
), get_stat_mtime (&s2
)) < 0)
1251 /* Make the progress messages mention that source is newer. */
1254 /* If we won't print another message, mention this anyway. */
1255 if (!NILP (nomessage
) && !force_load_messages
)
1257 Lisp_Object msg_file
;
1258 msg_file
= Fsubstring (found
, make_number (0), make_number (-1));
1259 message_with_string ("Source file `%s' newer than byte-compiled file",
1263 } /* !load_prefer_newer */
1268 /* We are loading a source file (*.el). */
1269 if (!NILP (Vload_source_file_function
))
1276 clear_unwind_protect (fd_index
);
1278 val
= call4 (Vload_source_file_function
, found
, hist_file_name
,
1279 NILP (noerror
) ? Qnil
: Qt
,
1280 (NILP (nomessage
) || force_load_messages
) ? Qnil
: Qt
);
1281 return unbind_to (count
, val
);
1287 /* We somehow got here with fd == -2, meaning the file is deemed
1288 to be remote. Don't even try to reopen the file locally;
1289 just force a failure. */
1297 clear_unwind_protect (fd_index
);
1298 efound
= ENCODE_FILE (found
);
1299 stream
= emacs_fopen (SSDATA (efound
), fmode
);
1301 stream
= fdopen (fd
, fmode
);
1305 report_file_error ("Opening stdio stream", file
);
1306 set_unwind_protect_ptr (fd_index
, fclose_unwind
, stream
);
1308 if (! NILP (Vpurify_flag
))
1309 Vpreloaded_file_list
= Fcons (Fpurecopy (file
), Vpreloaded_file_list
);
1311 if (NILP (nomessage
) || force_load_messages
)
1314 message_with_string ("Loading %s (compiled; note unsafe, not compiled in Emacs)...",
1317 message_with_string ("Loading %s (source)...", file
, 1);
1319 message_with_string ("Loading %s (compiled; note, source file is newer)...",
1321 else /* The typical case; compiled file newer than source file. */
1322 message_with_string ("Loading %s...", file
, 1);
1325 specbind (Qload_file_name
, found
);
1326 specbind (Qinhibit_file_name_operation
, Qnil
);
1327 specbind (Qload_in_progress
, Qt
);
1330 if (lisp_file_lexically_bound_p (Qget_file_char
))
1331 Fset (Qlexical_binding
, Qt
);
1333 if (! version
|| version
>= 22)
1334 readevalloop (Qget_file_char
, stream
, hist_file_name
,
1335 0, Qnil
, Qnil
, Qnil
, Qnil
);
1338 /* We can't handle a file which was compiled with
1339 byte-compile-dynamic by older version of Emacs. */
1340 specbind (Qload_force_doc_strings
, Qt
);
1341 readevalloop (Qget_emacs_mule_file_char
, stream
, hist_file_name
,
1342 0, Qnil
, Qnil
, Qnil
, Qnil
);
1344 unbind_to (count
, Qnil
);
1346 /* Run any eval-after-load forms for this file. */
1347 if (!NILP (Ffboundp (Qdo_after_load_evaluation
)))
1348 call1 (Qdo_after_load_evaluation
, hist_file_name
) ;
1350 xfree (saved_doc_string
);
1351 saved_doc_string
= 0;
1352 saved_doc_string_size
= 0;
1354 xfree (prev_saved_doc_string
);
1355 prev_saved_doc_string
= 0;
1356 prev_saved_doc_string_size
= 0;
1358 if (!noninteractive
&& (NILP (nomessage
) || force_load_messages
))
1361 message_with_string ("Loading %s (compiled; note unsafe, not compiled in Emacs)...done",
1364 message_with_string ("Loading %s (source)...done", file
, 1);
1366 message_with_string ("Loading %s (compiled; note, source file is newer)...done",
1368 else /* The typical case; compiled file newer than source file. */
1369 message_with_string ("Loading %s...done", file
, 1);
1376 complete_filename_p (Lisp_Object pathname
)
1378 const unsigned char *s
= SDATA (pathname
);
1379 return (IS_DIRECTORY_SEP (s
[0])
1380 || (SCHARS (pathname
) > 2
1381 && IS_DEVICE_SEP (s
[1]) && IS_DIRECTORY_SEP (s
[2])));
1384 DEFUN ("locate-file-internal", Flocate_file_internal
, Slocate_file_internal
, 2, 4, 0,
1385 doc
: /* Search for FILENAME through PATH.
1386 Returns the file's name in absolute form, or nil if not found.
1387 If SUFFIXES is non-nil, it should be a list of suffixes to append to
1388 file name when searching.
1389 If non-nil, PREDICATE is used instead of `file-readable-p'.
1390 PREDICATE can also be an integer to pass to the faccessat(2) function,
1391 in which case file-name-handlers are ignored.
1392 This function will normally skip directories, so if you want it to find
1393 directories, make sure the PREDICATE function returns `dir-ok' for them. */)
1394 (Lisp_Object filename
, Lisp_Object path
, Lisp_Object suffixes
, Lisp_Object predicate
)
1397 int fd
= openp (path
, filename
, suffixes
, &file
, predicate
, false);
1398 if (NILP (predicate
) && fd
>= 0)
1403 /* Search for a file whose name is STR, looking in directories
1404 in the Lisp list PATH, and trying suffixes from SUFFIX.
1405 On success, return a file descriptor (or 1 or -2 as described below).
1406 On failure, return -1 and set errno.
1408 SUFFIXES is a list of strings containing possible suffixes.
1409 The empty suffix is automatically added if the list is empty.
1411 PREDICATE t means the files are binary.
1412 PREDICATE non-nil and non-t means don't open the files,
1413 just look for one that satisfies the predicate. In this case,
1414 return 1 on success. The predicate can be a lisp function or
1415 an integer to pass to `access' (in which case file-name-handlers
1418 If STOREPTR is nonzero, it points to a slot where the name of
1419 the file actually found should be stored as a Lisp string.
1420 nil is stored there on failure.
1422 If the file we find is remote, return -2
1423 but store the found remote file name in *STOREPTR.
1425 If NEWER is true, try all SUFFIXes and return the result for the
1426 newest file that exists. Does not apply to remote files,
1427 or if a non-nil and non-t PREDICATE is specified. */
1430 openp (Lisp_Object path
, Lisp_Object str
, Lisp_Object suffixes
,
1431 Lisp_Object
*storeptr
, Lisp_Object predicate
, bool newer
)
1433 ptrdiff_t fn_size
= 100;
1437 ptrdiff_t want_length
;
1438 Lisp_Object filename
;
1439 Lisp_Object string
, tail
, encoded_fn
, save_string
;
1440 ptrdiff_t max_suffix_len
= 0;
1441 int last_errno
= ENOENT
;
1445 /* The last-modified time of the newest matching file found.
1446 Initialize it to something less than all valid timestamps. */
1447 struct timespec save_mtime
= make_timespec (TYPE_MINIMUM (time_t), -1);
1451 for (tail
= suffixes
; CONSP (tail
); tail
= XCDR (tail
))
1453 CHECK_STRING_CAR (tail
);
1454 max_suffix_len
= max (max_suffix_len
,
1455 SBYTES (XCAR (tail
)));
1458 string
= filename
= encoded_fn
= save_string
= Qnil
;
1463 absolute
= complete_filename_p (str
);
1465 for (; CONSP (path
); path
= XCDR (path
))
1467 ptrdiff_t baselen
, prefixlen
;
1469 filename
= Fexpand_file_name (str
, XCAR (path
));
1470 if (!complete_filename_p (filename
))
1471 /* If there are non-absolute elts in PATH (eg "."). */
1472 /* Of course, this could conceivably lose if luser sets
1473 default-directory to be something non-absolute... */
1475 filename
= Fexpand_file_name (filename
, BVAR (current_buffer
, directory
));
1476 if (!complete_filename_p (filename
))
1477 /* Give up on this path element! */
1481 /* Calculate maximum length of any filename made from
1482 this path element/specified file name and any possible suffix. */
1483 want_length
= max_suffix_len
+ SBYTES (filename
);
1484 if (fn_size
<= want_length
)
1486 fn_size
= 100 + want_length
;
1487 fn
= SAFE_ALLOCA (fn_size
);
1490 /* Copy FILENAME's data to FN but remove starting /: if any. */
1491 prefixlen
= ((SCHARS (filename
) > 2
1492 && SREF (filename
, 0) == '/'
1493 && SREF (filename
, 1) == ':')
1495 baselen
= SBYTES (filename
) - prefixlen
;
1496 memcpy (fn
, SDATA (filename
) + prefixlen
, baselen
);
1498 /* Loop over suffixes. */
1499 for (tail
= NILP (suffixes
) ? list1 (empty_unibyte_string
) : suffixes
;
1500 CONSP (tail
); tail
= XCDR (tail
))
1502 Lisp_Object suffix
= XCAR (tail
);
1503 ptrdiff_t fnlen
, lsuffix
= SBYTES (suffix
);
1504 Lisp_Object handler
;
1506 /* Make complete filename by appending SUFFIX. */
1507 memcpy (fn
+ baselen
, SDATA (suffix
), lsuffix
+ 1);
1508 fnlen
= baselen
+ lsuffix
;
1510 /* Check that the file exists and is not a directory. */
1511 /* We used to only check for handlers on non-absolute file names:
1515 handler = Ffind_file_name_handler (filename, Qfile_exists_p);
1516 It's not clear why that was the case and it breaks things like
1517 (load "/bar.el") where the file is actually "/bar.el.gz". */
1518 /* make_string has its own ideas on when to return a unibyte
1519 string and when a multibyte string, but we know better.
1520 We must have a unibyte string when dumping, since
1521 file-name encoding is shaky at best at that time, and in
1522 particular default-file-name-coding-system is reset
1523 several times during loadup. We therefore don't want to
1524 encode the file before passing it to file I/O library
1526 if (!STRING_MULTIBYTE (filename
) && !STRING_MULTIBYTE (suffix
))
1527 string
= make_unibyte_string (fn
, fnlen
);
1529 string
= make_string (fn
, fnlen
);
1530 handler
= Ffind_file_name_handler (string
, Qfile_exists_p
);
1531 if ((!NILP (handler
) || (!NILP (predicate
) && !EQ (predicate
, Qt
)))
1532 && !NATNUMP (predicate
))
1535 if (NILP (predicate
) || EQ (predicate
, Qt
))
1536 exists
= !NILP (Ffile_readable_p (string
));
1539 Lisp_Object tmp
= call1 (predicate
, string
);
1542 else if (EQ (tmp
, Qdir_ok
)
1543 || NILP (Ffile_directory_p (string
)))
1548 last_errno
= EISDIR
;
1554 /* We succeeded; return this descriptor and filename. */
1567 encoded_fn
= ENCODE_FILE (string
);
1568 pfn
= SSDATA (encoded_fn
);
1570 /* Check that we can access or open it. */
1571 if (NATNUMP (predicate
))
1574 if (INT_MAX
< XFASTINT (predicate
))
1575 last_errno
= EINVAL
;
1576 else if (faccessat (AT_FDCWD
, pfn
, XFASTINT (predicate
),
1580 if (file_directory_p (pfn
))
1581 last_errno
= EISDIR
;
1588 fd
= emacs_open (pfn
, O_RDONLY
, 0);
1591 if (errno
!= ENOENT
)
1596 int err
= (fstat (fd
, &st
) != 0 ? errno
1597 : S_ISDIR (st
.st_mode
) ? EISDIR
: 0);
1609 if (newer
&& !NATNUMP (predicate
))
1611 struct timespec mtime
= get_stat_mtime (&st
);
1613 if (timespec_cmp (mtime
, save_mtime
) <= 0)
1618 emacs_close (save_fd
);
1621 save_string
= string
;
1626 /* We succeeded; return this descriptor and filename. */
1634 /* No more suffixes. Return the newest. */
1635 if (0 <= save_fd
&& ! CONSP (XCDR (tail
)))
1638 *storeptr
= save_string
;
1654 /* Merge the list we've accumulated of globals from the current input source
1655 into the load_history variable. The details depend on whether
1656 the source has an associated file name or not.
1658 FILENAME is the file name that we are loading from.
1660 ENTIRE is true if loading that entire file, false if evaluating
1664 build_load_history (Lisp_Object filename
, bool entire
)
1666 Lisp_Object tail
, prev
, newelt
;
1667 Lisp_Object tem
, tem2
;
1670 tail
= Vload_history
;
1673 while (CONSP (tail
))
1677 /* Find the feature's previous assoc list... */
1678 if (!NILP (Fequal (filename
, Fcar (tem
))))
1682 /* If we're loading the entire file, remove old data. */
1686 Vload_history
= XCDR (tail
);
1688 Fsetcdr (prev
, XCDR (tail
));
1691 /* Otherwise, cons on new symbols that are not already members. */
1694 tem2
= Vcurrent_load_list
;
1696 while (CONSP (tem2
))
1698 newelt
= XCAR (tem2
);
1700 if (NILP (Fmember (newelt
, tem
)))
1701 Fsetcar (tail
, Fcons (XCAR (tem
),
1702 Fcons (newelt
, XCDR (tem
))));
1715 /* If we're loading an entire file, cons the new assoc onto the
1716 front of load-history, the most-recently-loaded position. Also
1717 do this if we didn't find an existing member for the file. */
1718 if (entire
|| !foundit
)
1719 Vload_history
= Fcons (Fnreverse (Vcurrent_load_list
),
1724 readevalloop_1 (int old
)
1726 load_convert_to_unibyte
= old
;
1729 /* Signal an `end-of-file' error, if possible with file name
1732 static _Noreturn
void
1733 end_of_file_error (void)
1735 if (STRINGP (Vload_file_name
))
1736 xsignal1 (Qend_of_file
, Vload_file_name
);
1738 xsignal0 (Qend_of_file
);
1742 readevalloop_eager_expand_eval (Lisp_Object val
, Lisp_Object macroexpand
)
1744 /* If we macroexpand the toplevel form non-recursively and it ends
1745 up being a `progn' (or if it was a progn to start), treat each
1746 form in the progn as a top-level form. This way, if one form in
1747 the progn defines a macro, that macro is in effect when we expand
1748 the remaining forms. See similar code in bytecomp.el. */
1749 val
= call2 (macroexpand
, val
, Qnil
);
1750 if (EQ (CAR_SAFE (val
), Qprogn
))
1752 Lisp_Object subforms
= XCDR (val
);
1754 for (val
= Qnil
; CONSP (subforms
); subforms
= XCDR (subforms
))
1755 val
= readevalloop_eager_expand_eval (XCAR (subforms
),
1759 val
= eval_sub (call2 (macroexpand
, val
, Qt
));
1763 /* UNIBYTE specifies how to set load_convert_to_unibyte
1764 for this invocation.
1765 READFUN, if non-nil, is used instead of `read'.
1767 START, END specify region to read in current buffer (from eval-region).
1768 If the input is not from a buffer, they must be nil. */
1771 readevalloop (Lisp_Object readcharfun
,
1773 Lisp_Object sourcename
,
1775 Lisp_Object unibyte
, Lisp_Object readfun
,
1776 Lisp_Object start
, Lisp_Object end
)
1780 ptrdiff_t count
= SPECPDL_INDEX ();
1781 struct buffer
*b
= 0;
1782 bool continue_reading_p
;
1783 Lisp_Object lex_bound
;
1784 /* True if reading an entire buffer. */
1785 bool whole_buffer
= 0;
1786 /* True on the first time around. */
1787 bool first_sexp
= 1;
1788 Lisp_Object macroexpand
= intern ("internal-macroexpand-for-load");
1790 if (NILP (Ffboundp (macroexpand
))
1791 /* Don't macroexpand in .elc files, since it should have been done
1792 already. We actually don't know whether we're in a .elc file or not,
1793 so we use circumstantial evidence: .el files normally go through
1794 Vload_source_file_function -> load-with-code-conversion
1796 || EQ (readcharfun
, Qget_file_char
)
1797 || EQ (readcharfun
, Qget_emacs_mule_file_char
))
1800 if (MARKERP (readcharfun
))
1803 start
= readcharfun
;
1806 if (BUFFERP (readcharfun
))
1807 b
= XBUFFER (readcharfun
);
1808 else if (MARKERP (readcharfun
))
1809 b
= XMARKER (readcharfun
)->buffer
;
1811 /* We assume START is nil when input is not from a buffer. */
1812 if (! NILP (start
) && !b
)
1815 specbind (Qstandard_input
, readcharfun
);
1816 specbind (Qcurrent_load_list
, Qnil
);
1817 record_unwind_protect_int (readevalloop_1
, load_convert_to_unibyte
);
1818 load_convert_to_unibyte
= !NILP (unibyte
);
1820 /* If lexical binding is active (either because it was specified in
1821 the file's header, or via a buffer-local variable), create an empty
1822 lexical environment, otherwise, turn off lexical binding. */
1823 lex_bound
= find_symbol_value (Qlexical_binding
);
1824 specbind (Qinternal_interpreter_environment
,
1825 (NILP (lex_bound
) || EQ (lex_bound
, Qunbound
)
1826 ? Qnil
: list1 (Qt
)));
1828 /* Try to ensure sourcename is a truename, except whilst preloading. */
1829 if (NILP (Vpurify_flag
)
1830 && !NILP (sourcename
) && !NILP (Ffile_name_absolute_p (sourcename
))
1831 && !NILP (Ffboundp (Qfile_truename
)))
1832 sourcename
= call1 (Qfile_truename
, sourcename
) ;
1834 LOADHIST_ATTACH (sourcename
);
1836 continue_reading_p
= 1;
1837 while (continue_reading_p
)
1839 ptrdiff_t count1
= SPECPDL_INDEX ();
1841 if (b
!= 0 && !BUFFER_LIVE_P (b
))
1842 error ("Reading from killed buffer");
1846 /* Switch to the buffer we are reading from. */
1847 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
1848 set_buffer_internal (b
);
1850 /* Save point in it. */
1851 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
1852 /* Save ZV in it. */
1853 record_unwind_protect (save_restriction_restore
, save_restriction_save ());
1854 /* Those get unbound after we read one expression. */
1856 /* Set point and ZV around stuff to be read. */
1859 Fnarrow_to_region (make_number (BEGV
), end
);
1861 /* Just for cleanliness, convert END to a marker
1862 if it is an integer. */
1864 end
= Fpoint_max_marker ();
1867 /* On the first cycle, we can easily test here
1868 whether we are reading the whole buffer. */
1869 if (b
&& first_sexp
)
1870 whole_buffer
= (PT
== BEG
&& ZV
== Z
);
1877 while ((c
= READCHAR
) != '\n' && c
!= -1);
1882 unbind_to (count1
, Qnil
);
1886 /* Ignore whitespace here, so we can detect eof. */
1887 if (c
== ' ' || c
== '\t' || c
== '\n' || c
== '\f' || c
== '\r'
1888 || c
== NO_BREAK_SPACE
)
1891 if (!NILP (Vpurify_flag
) && c
== '(')
1893 val
= read_list (0, readcharfun
);
1898 read_objects
= Qnil
;
1899 if (!NILP (readfun
))
1901 val
= call1 (readfun
, readcharfun
);
1903 /* If READCHARFUN has set point to ZV, we should
1904 stop reading, even if the form read sets point
1905 to a different value when evaluated. */
1906 if (BUFFERP (readcharfun
))
1908 struct buffer
*buf
= XBUFFER (readcharfun
);
1909 if (BUF_PT (buf
) == BUF_ZV (buf
))
1910 continue_reading_p
= 0;
1913 else if (! NILP (Vload_read_function
))
1914 val
= call1 (Vload_read_function
, readcharfun
);
1916 val
= read_internal_start (readcharfun
, Qnil
, Qnil
);
1919 if (!NILP (start
) && continue_reading_p
)
1920 start
= Fpoint_marker ();
1922 /* Restore saved point and BEGV. */
1923 unbind_to (count1
, Qnil
);
1925 /* Now eval what we just read. */
1926 if (!NILP (macroexpand
))
1927 val
= readevalloop_eager_expand_eval (val
, macroexpand
);
1929 val
= eval_sub (val
);
1933 Vvalues
= Fcons (val
, Vvalues
);
1934 if (EQ (Vstandard_output
, Qt
))
1943 build_load_history (sourcename
,
1944 stream
|| whole_buffer
);
1946 unbind_to (count
, Qnil
);
1949 DEFUN ("eval-buffer", Feval_buffer
, Seval_buffer
, 0, 5, "",
1950 doc
: /* Execute the accessible portion of current buffer as Lisp code.
1951 You can use \\[narrow-to-region] to limit the part of buffer to be evaluated.
1952 When called from a Lisp program (i.e., not interactively), this
1953 function accepts up to five optional arguments:
1954 BUFFER is the buffer to evaluate (nil means use current buffer),
1955 or a name of a buffer (a string).
1956 PRINTFLAG controls printing of output by any output functions in the
1957 evaluated code, such as `print', `princ', and `prin1':
1958 a value of nil means discard it; anything else is the stream to print to.
1959 See Info node `(elisp)Output Streams' for details on streams.
1960 FILENAME specifies the file name to use for `load-history'.
1961 UNIBYTE, if non-nil, specifies `load-convert-to-unibyte' for this
1963 DO-ALLOW-PRINT, if non-nil, specifies that output functions in the
1964 evaluated code should work normally even if PRINTFLAG is nil, in
1965 which case the output is displayed in the echo area.
1967 This function preserves the position of point. */)
1968 (Lisp_Object buffer
, Lisp_Object printflag
, Lisp_Object filename
, Lisp_Object unibyte
, Lisp_Object do_allow_print
)
1970 ptrdiff_t count
= SPECPDL_INDEX ();
1971 Lisp_Object tem
, buf
;
1974 buf
= Fcurrent_buffer ();
1976 buf
= Fget_buffer (buffer
);
1978 error ("No such buffer");
1980 if (NILP (printflag
) && NILP (do_allow_print
))
1985 if (NILP (filename
))
1986 filename
= BVAR (XBUFFER (buf
), filename
);
1988 specbind (Qeval_buffer_list
, Fcons (buf
, Veval_buffer_list
));
1989 specbind (Qstandard_output
, tem
);
1990 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
1991 BUF_TEMP_SET_PT (XBUFFER (buf
), BUF_BEGV (XBUFFER (buf
)));
1992 specbind (Qlexical_binding
, lisp_file_lexically_bound_p (buf
) ? Qt
: Qnil
);
1993 readevalloop (buf
, 0, filename
,
1994 !NILP (printflag
), unibyte
, Qnil
, Qnil
, Qnil
);
1995 unbind_to (count
, Qnil
);
2000 DEFUN ("eval-region", Feval_region
, Seval_region
, 2, 4, "r",
2001 doc
: /* Execute the region as Lisp code.
2002 When called from programs, expects two arguments,
2003 giving starting and ending indices in the current buffer
2004 of the text to be executed.
2005 Programs can pass third argument PRINTFLAG which controls output:
2006 a value of nil means discard it; anything else is stream for printing it.
2007 See Info node `(elisp)Output Streams' for details on streams.
2008 Also the fourth argument READ-FUNCTION, if non-nil, is used
2009 instead of `read' to read each expression. It gets one argument
2010 which is the input stream for reading characters.
2012 This function does not move point. */)
2013 (Lisp_Object start
, Lisp_Object end
, Lisp_Object printflag
, Lisp_Object read_function
)
2015 /* FIXME: Do the eval-sexp-add-defvars dance! */
2016 ptrdiff_t count
= SPECPDL_INDEX ();
2017 Lisp_Object tem
, cbuf
;
2019 cbuf
= Fcurrent_buffer ();
2021 if (NILP (printflag
))
2025 specbind (Qstandard_output
, tem
);
2026 specbind (Qeval_buffer_list
, Fcons (cbuf
, Veval_buffer_list
));
2028 /* `readevalloop' calls functions which check the type of start and end. */
2029 readevalloop (cbuf
, 0, BVAR (XBUFFER (cbuf
), filename
),
2030 !NILP (printflag
), Qnil
, read_function
,
2033 return unbind_to (count
, Qnil
);
2037 DEFUN ("read", Fread
, Sread
, 0, 1, 0,
2038 doc
: /* Read one Lisp expression as text from STREAM, return as Lisp object.
2039 If STREAM is nil, use the value of `standard-input' (which see).
2040 STREAM or the value of `standard-input' may be:
2041 a buffer (read from point and advance it)
2042 a marker (read from where it points and advance it)
2043 a function (call it with no arguments for each character,
2044 call it with a char as argument to push a char back)
2045 a string (takes text from string, starting at the beginning)
2046 t (read text line using minibuffer and use it, or read from
2047 standard input in batch mode). */)
2048 (Lisp_Object stream
)
2051 stream
= Vstandard_input
;
2052 if (EQ (stream
, Qt
))
2053 stream
= Qread_char
;
2054 if (EQ (stream
, Qread_char
))
2055 /* FIXME: ?! When is this used !? */
2056 return call1 (intern ("read-minibuffer"),
2057 build_string ("Lisp expression: "));
2059 return read_internal_start (stream
, Qnil
, Qnil
);
2062 DEFUN ("read-from-string", Fread_from_string
, Sread_from_string
, 1, 3, 0,
2063 doc
: /* Read one Lisp expression which is represented as text by STRING.
2064 Returns a cons: (OBJECT-READ . FINAL-STRING-INDEX).
2065 FINAL-STRING-INDEX is an integer giving the position of the next
2066 remaining character in STRING. START and END optionally delimit
2067 a substring of STRING from which to read; they default to 0 and
2068 \(length STRING) respectively. Negative values are counted from
2069 the end of STRING. */)
2070 (Lisp_Object string
, Lisp_Object start
, Lisp_Object end
)
2073 CHECK_STRING (string
);
2074 /* `read_internal_start' sets `read_from_string_index'. */
2075 ret
= read_internal_start (string
, start
, end
);
2076 return Fcons (ret
, make_number (read_from_string_index
));
2079 /* Function to set up the global context we need in toplevel read
2080 calls. START and END only used when STREAM is a string. */
2082 read_internal_start (Lisp_Object stream
, Lisp_Object start
, Lisp_Object end
)
2087 new_backquote_flag
= 0;
2088 read_objects
= Qnil
;
2089 if (EQ (Vread_with_symbol_positions
, Qt
)
2090 || EQ (Vread_with_symbol_positions
, stream
))
2091 Vread_symbol_positions_list
= Qnil
;
2093 if (STRINGP (stream
)
2094 || ((CONSP (stream
) && STRINGP (XCAR (stream
)))))
2096 ptrdiff_t startval
, endval
;
2099 if (STRINGP (stream
))
2102 string
= XCAR (stream
);
2104 validate_subarray (string
, start
, end
, SCHARS (string
),
2105 &startval
, &endval
);
2107 read_from_string_index
= startval
;
2108 read_from_string_index_byte
= string_char_to_byte (string
, startval
);
2109 read_from_string_limit
= endval
;
2112 retval
= read0 (stream
);
2113 if (EQ (Vread_with_symbol_positions
, Qt
)
2114 || EQ (Vread_with_symbol_positions
, stream
))
2115 Vread_symbol_positions_list
= Fnreverse (Vread_symbol_positions_list
);
2120 /* Signal Qinvalid_read_syntax error.
2121 S is error string of length N (if > 0) */
2123 static _Noreturn
void
2124 invalid_syntax (const char *s
)
2126 xsignal1 (Qinvalid_read_syntax
, build_string (s
));
2130 /* Use this for recursive reads, in contexts where internal tokens
2134 read0 (Lisp_Object readcharfun
)
2136 register Lisp_Object val
;
2139 val
= read1 (readcharfun
, &c
, 0);
2143 xsignal1 (Qinvalid_read_syntax
,
2144 Fmake_string (make_number (1), make_number (c
)));
2147 static ptrdiff_t read_buffer_size
;
2148 static char *read_buffer
;
2150 /* Grow the read buffer by at least MAX_MULTIBYTE_LENGTH bytes. */
2153 grow_read_buffer (void)
2155 read_buffer
= xpalloc (read_buffer
, &read_buffer_size
,
2156 MAX_MULTIBYTE_LENGTH
, -1, 1);
2159 /* Return the scalar value that has the Unicode character name NAME.
2160 Raise 'invalid-read-syntax' if there is no such character. */
2162 character_name_to_code (char const *name
, ptrdiff_t name_len
)
2164 /* For "U+XXXX", pass the leading '+' to string_to_number to reject
2165 monstrosities like "U+-0000". */
2167 = (name
[0] == 'U' && name
[1] == '+'
2168 ? string_to_number (name
+ 1, 16, false)
2169 : call2 (Qchar_from_name
, make_unibyte_string (name
, name_len
), Qt
));
2171 if (! RANGED_INTEGERP (0, code
, MAX_UNICODE_CHAR
)
2172 || char_surrogate_p (XINT (code
)))
2174 AUTO_STRING (format
, "\\N{%s}");
2175 AUTO_STRING_WITH_LEN (namestr
, name
, name_len
);
2176 xsignal1 (Qinvalid_read_syntax
, CALLN (Fformat
, format
, namestr
));
2182 /* Bound on the length of a Unicode character name. As of
2183 Unicode 9.0.0 the maximum is 83, so this should be safe. */
2184 enum { UNICODE_CHARACTER_NAME_LENGTH_BOUND
= 200 };
2186 /* Read a \-escape sequence, assuming we already read the `\'.
2187 If the escape sequence forces unibyte, return eight-bit char. */
2190 read_escape (Lisp_Object readcharfun
, bool stringp
)
2193 /* \u allows up to four hex digits, \U up to eight. Default to the
2194 behavior for \u, and change this value in the case that \U is seen. */
2195 int unicode_hex_count
= 4;
2200 end_of_file_error ();
2230 error ("Invalid escape character syntax");
2233 c
= read_escape (readcharfun
, 0);
2234 return c
| meta_modifier
;
2239 error ("Invalid escape character syntax");
2242 c
= read_escape (readcharfun
, 0);
2243 return c
| shift_modifier
;
2248 error ("Invalid escape character syntax");
2251 c
= read_escape (readcharfun
, 0);
2252 return c
| hyper_modifier
;
2257 error ("Invalid escape character syntax");
2260 c
= read_escape (readcharfun
, 0);
2261 return c
| alt_modifier
;
2265 if (stringp
|| c
!= '-')
2272 c
= read_escape (readcharfun
, 0);
2273 return c
| super_modifier
;
2278 error ("Invalid escape character syntax");
2282 c
= read_escape (readcharfun
, 0);
2283 if ((c
& ~CHAR_MODIFIER_MASK
) == '?')
2284 return 0177 | (c
& CHAR_MODIFIER_MASK
);
2285 else if (! SINGLE_BYTE_CHAR_P ((c
& ~CHAR_MODIFIER_MASK
)))
2286 return c
| ctrl_modifier
;
2287 /* ASCII control chars are made from letters (both cases),
2288 as well as the non-letters within 0100...0137. */
2289 else if ((c
& 0137) >= 0101 && (c
& 0137) <= 0132)
2290 return (c
& (037 | ~0177));
2291 else if ((c
& 0177) >= 0100 && (c
& 0177) <= 0137)
2292 return (c
& (037 | ~0177));
2294 return c
| ctrl_modifier
;
2304 /* An octal escape, as in ANSI C. */
2306 register int i
= c
- '0';
2307 register int count
= 0;
2310 if ((c
= READCHAR
) >= '0' && c
<= '7')
2322 if (i
>= 0x80 && i
< 0x100)
2323 i
= BYTE8_TO_CHAR (i
);
2328 /* A hex escape, as in ANSI C. */
2335 if (c
>= '0' && c
<= '9')
2340 else if ((c
>= 'a' && c
<= 'f')
2341 || (c
>= 'A' && c
<= 'F'))
2344 if (c
>= 'a' && c
<= 'f')
2354 /* Allow hex escapes as large as ?\xfffffff, because some
2355 packages use them to denote characters with modifiers. */
2356 if ((CHAR_META
| (CHAR_META
- 1)) < i
)
2357 error ("Hex character out of range: \\x%x...", i
);
2361 if (count
< 3 && i
>= 0x80)
2362 return BYTE8_TO_CHAR (i
);
2367 /* Post-Unicode-2.0: Up to eight hex chars. */
2368 unicode_hex_count
= 8;
2371 /* A Unicode escape. We only permit them in strings and characters,
2372 not arbitrarily in the source code, as in some other languages. */
2377 while (++count
<= unicode_hex_count
)
2380 /* `isdigit' and `isalpha' may be locale-specific, which we don't
2382 if (c
>= '0' && c
<= '9') i
= (i
<< 4) + (c
- '0');
2383 else if (c
>= 'a' && c
<= 'f') i
= (i
<< 4) + (c
- 'a') + 10;
2384 else if (c
>= 'A' && c
<= 'F') i
= (i
<< 4) + (c
- 'A') + 10;
2386 error ("Non-hex digit used for Unicode escape");
2389 error ("Non-Unicode character: 0x%x", i
);
2394 /* Named character. */
2398 invalid_syntax ("Expected opening brace after \\N");
2399 char name
[UNICODE_CHARACTER_NAME_LENGTH_BOUND
+ 1];
2400 bool whitespace
= false;
2401 ptrdiff_t length
= 0;
2406 end_of_file_error ();
2409 if (! (0 < c
&& c
< 0x80))
2411 AUTO_STRING (format
,
2412 "Invalid character U+%04X in character name");
2413 xsignal1 (Qinvalid_read_syntax
,
2414 CALLN (Fformat
, format
, make_natnum (c
)));
2416 /* Treat multiple adjacent whitespace characters as a
2417 single space character. This makes it easier to use
2418 character names in e.g. multi-line strings. */
2429 if (length
>= sizeof name
)
2430 invalid_syntax ("Character name too long");
2433 invalid_syntax ("Empty character name");
2434 name
[length
] = '\0';
2435 return character_name_to_code (name
, length
);
2443 /* Return the digit that CHARACTER stands for in the given BASE.
2444 Return -1 if CHARACTER is out of range for BASE,
2445 and -2 if CHARACTER is not valid for any supported BASE. */
2447 digit_to_number (int character
, int base
)
2451 if ('0' <= character
&& character
<= '9')
2452 digit
= character
- '0';
2453 else if ('a' <= character
&& character
<= 'z')
2454 digit
= character
- 'a' + 10;
2455 else if ('A' <= character
&& character
<= 'Z')
2456 digit
= character
- 'A' + 10;
2460 return digit
< base
? digit
: -1;
2463 /* Read an integer in radix RADIX using READCHARFUN to read
2464 characters. RADIX must be in the interval [2..36]; if it isn't, a
2465 read error is signaled . Value is the integer read. Signals an
2466 error if encountering invalid read syntax or if RADIX is out of
2470 read_integer (Lisp_Object readcharfun
, EMACS_INT radix
)
2472 /* Room for sign, leading 0, other digits, trailing null byte.
2473 Also, room for invalid syntax diagnostic. */
2474 char buf
[max (1 + 1 + UINTMAX_WIDTH
+ 1,
2475 sizeof "integer, radix " + INT_STRLEN_BOUND (EMACS_INT
))];
2477 int valid
= -1; /* 1 if valid, 0 if not, -1 if incomplete. */
2479 if (radix
< 2 || radix
> 36)
2487 if (c
== '-' || c
== '+')
2498 /* Ignore redundant leading zeros, so the buffer doesn't
2499 fill up with them. */
2505 while ((digit
= digit_to_number (c
, radix
)) >= -1)
2512 if (p
< buf
+ sizeof buf
- 1)
2526 sprintf (buf
, "integer, radix %"pI
"d", radix
);
2527 invalid_syntax (buf
);
2530 return string_to_number (buf
, radix
, 0);
2534 /* If the next token is ')' or ']' or '.', we store that character
2535 in *PCH and the return value is not interesting. Else, we store
2536 zero in *PCH and we read and return one lisp object.
2538 FIRST_IN_LIST is true if this is the first element of a list. */
2541 read1 (Lisp_Object readcharfun
, int *pch
, bool first_in_list
)
2544 bool uninterned_symbol
= 0;
2551 c
= READCHAR_REPORT_MULTIBYTE (&multibyte
);
2553 end_of_file_error ();
2558 return read_list (0, readcharfun
);
2561 return read_vector (readcharfun
, 0);
2577 /* Accept extended format for hashtables (extensible to
2579 #s(hash-table size 2 test equal data (k1 v1 k2 v2)) */
2580 Lisp_Object tmp
= read_list (0, readcharfun
);
2581 Lisp_Object head
= CAR_SAFE (tmp
);
2582 Lisp_Object data
= Qnil
;
2583 Lisp_Object val
= Qnil
;
2584 /* The size is 2 * number of allowed keywords to
2586 Lisp_Object params
[10];
2588 Lisp_Object key
= Qnil
;
2589 int param_count
= 0;
2591 if (!EQ (head
, Qhash_table
))
2592 error ("Invalid extended read marker at head of #s list "
2593 "(only hash-table allowed)");
2595 tmp
= CDR_SAFE (tmp
);
2597 /* This is repetitive but fast and simple. */
2598 params
[param_count
] = QCsize
;
2599 params
[param_count
+ 1] = Fplist_get (tmp
, Qsize
);
2600 if (!NILP (params
[param_count
+ 1]))
2603 params
[param_count
] = QCtest
;
2604 params
[param_count
+ 1] = Fplist_get (tmp
, Qtest
);
2605 if (!NILP (params
[param_count
+ 1]))
2608 params
[param_count
] = QCweakness
;
2609 params
[param_count
+ 1] = Fplist_get (tmp
, Qweakness
);
2610 if (!NILP (params
[param_count
+ 1]))
2613 params
[param_count
] = QCrehash_size
;
2614 params
[param_count
+ 1] = Fplist_get (tmp
, Qrehash_size
);
2615 if (!NILP (params
[param_count
+ 1]))
2618 params
[param_count
] = QCrehash_threshold
;
2619 params
[param_count
+ 1] = Fplist_get (tmp
, Qrehash_threshold
);
2620 if (!NILP (params
[param_count
+ 1]))
2623 /* This is the hashtable data. */
2624 data
= Fplist_get (tmp
, Qdata
);
2626 /* Now use params to make a new hashtable and fill it. */
2627 ht
= Fmake_hash_table (param_count
, params
);
2629 while (CONSP (data
))
2634 error ("Odd number of elements in hashtable data");
2637 Fputhash (key
, val
, ht
);
2643 invalid_syntax ("#");
2651 tmp
= read_vector (readcharfun
, 0);
2652 if (ASIZE (tmp
) < CHAR_TABLE_STANDARD_SLOTS
)
2653 error ("Invalid size char-table");
2654 XSETPVECTYPE (XVECTOR (tmp
), PVEC_CHAR_TABLE
);
2662 /* Sub char-table can't be read as a regular
2663 vector because of a two C integer fields. */
2664 Lisp_Object tbl
, tmp
= read_list (1, readcharfun
);
2665 ptrdiff_t size
= XINT (Flength (tmp
));
2666 int i
, depth
, min_char
;
2667 struct Lisp_Cons
*cell
;
2670 error ("Zero-sized sub char-table");
2672 if (! RANGED_INTEGERP (1, XCAR (tmp
), 3))
2673 error ("Invalid depth in sub char-table");
2674 depth
= XINT (XCAR (tmp
));
2675 if (chartab_size
[depth
] != size
- 2)
2676 error ("Invalid size in sub char-table");
2677 cell
= XCONS (tmp
), tmp
= XCDR (tmp
), size
--;
2680 if (! RANGED_INTEGERP (0, XCAR (tmp
), MAX_CHAR
))
2681 error ("Invalid minimum character in sub-char-table");
2682 min_char
= XINT (XCAR (tmp
));
2683 cell
= XCONS (tmp
), tmp
= XCDR (tmp
), size
--;
2686 tbl
= make_uninit_sub_char_table (depth
, min_char
);
2687 for (i
= 0; i
< size
; i
++)
2689 XSUB_CHAR_TABLE (tbl
)->contents
[i
] = XCAR (tmp
);
2690 cell
= XCONS (tmp
), tmp
= XCDR (tmp
);
2695 invalid_syntax ("#^^");
2697 invalid_syntax ("#^");
2702 length
= read1 (readcharfun
, pch
, first_in_list
);
2706 Lisp_Object tmp
, val
;
2707 EMACS_INT size_in_chars
= bool_vector_bytes (XFASTINT (length
));
2708 unsigned char *data
;
2711 tmp
= read1 (readcharfun
, pch
, first_in_list
);
2712 if (STRING_MULTIBYTE (tmp
)
2713 || (size_in_chars
!= SCHARS (tmp
)
2714 /* We used to print 1 char too many
2715 when the number of bits was a multiple of 8.
2716 Accept such input in case it came from an old
2718 && ! (XFASTINT (length
)
2719 == (SCHARS (tmp
) - 1) * BOOL_VECTOR_BITS_PER_CHAR
)))
2720 invalid_syntax ("#&...");
2722 val
= make_uninit_bool_vector (XFASTINT (length
));
2723 data
= bool_vector_uchar_data (val
);
2724 memcpy (data
, SDATA (tmp
), size_in_chars
);
2725 /* Clear the extraneous bits in the last byte. */
2726 if (XINT (length
) != size_in_chars
* BOOL_VECTOR_BITS_PER_CHAR
)
2727 data
[size_in_chars
- 1]
2728 &= (1 << (XINT (length
) % BOOL_VECTOR_BITS_PER_CHAR
)) - 1;
2731 invalid_syntax ("#&...");
2735 /* Accept compiled functions at read-time so that we don't have to
2736 build them using function calls. */
2738 struct Lisp_Vector
*vec
;
2739 tmp
= read_vector (readcharfun
, 1);
2740 vec
= XVECTOR (tmp
);
2741 if (vec
->header
.size
== 0)
2742 invalid_syntax ("Empty byte-code object");
2743 make_byte_code (vec
);
2751 /* Read the string itself. */
2752 tmp
= read1 (readcharfun
, &ch
, 0);
2753 if (ch
!= 0 || !STRINGP (tmp
))
2754 invalid_syntax ("#");
2755 /* Read the intervals and their properties. */
2758 Lisp_Object beg
, end
, plist
;
2760 beg
= read1 (readcharfun
, &ch
, 0);
2765 end
= read1 (readcharfun
, &ch
, 0);
2767 plist
= read1 (readcharfun
, &ch
, 0);
2769 invalid_syntax ("Invalid string property list");
2770 Fset_text_properties (beg
, end
, plist
, tmp
);
2776 /* #@NUMBER is used to skip NUMBER following bytes.
2777 That's used in .elc files to skip over doc strings
2778 and function definitions. */
2781 enum { extra
= 100 };
2782 ptrdiff_t i
, nskip
= 0, digits
= 0;
2784 /* Read a decimal integer. */
2785 while ((c
= READCHAR
) >= 0
2786 && c
>= '0' && c
<= '9')
2788 if ((STRING_BYTES_BOUND
- extra
) / 10 <= nskip
)
2793 if (digits
== 2 && nskip
== 0)
2794 { /* We've just seen #@00, which means "skip to end". */
2795 skip_dyn_eof (readcharfun
);
2800 /* We can't use UNREAD here, because in the code below we side-step
2801 READCHAR. Instead, assume the first char after #@NNN occupies
2802 a single byte, which is the case normally since it's just
2808 if (load_force_doc_strings
2809 && (FROM_FILE_P (readcharfun
)))
2811 /* If we are supposed to force doc strings into core right now,
2812 record the last string that we skipped,
2813 and record where in the file it comes from. */
2815 /* But first exchange saved_doc_string
2816 with prev_saved_doc_string, so we save two strings. */
2818 char *temp
= saved_doc_string
;
2819 ptrdiff_t temp_size
= saved_doc_string_size
;
2820 file_offset temp_pos
= saved_doc_string_position
;
2821 ptrdiff_t temp_len
= saved_doc_string_length
;
2823 saved_doc_string
= prev_saved_doc_string
;
2824 saved_doc_string_size
= prev_saved_doc_string_size
;
2825 saved_doc_string_position
= prev_saved_doc_string_position
;
2826 saved_doc_string_length
= prev_saved_doc_string_length
;
2828 prev_saved_doc_string
= temp
;
2829 prev_saved_doc_string_size
= temp_size
;
2830 prev_saved_doc_string_position
= temp_pos
;
2831 prev_saved_doc_string_length
= temp_len
;
2834 if (saved_doc_string_size
== 0)
2836 saved_doc_string
= xmalloc (nskip
+ extra
);
2837 saved_doc_string_size
= nskip
+ extra
;
2839 if (nskip
> saved_doc_string_size
)
2841 saved_doc_string
= xrealloc (saved_doc_string
, nskip
+ extra
);
2842 saved_doc_string_size
= nskip
+ extra
;
2845 saved_doc_string_position
= file_tell (instream
);
2847 /* Copy that many characters into saved_doc_string. */
2849 for (i
= 0; i
< nskip
&& c
>= 0; i
++)
2850 saved_doc_string
[i
] = c
= getc (instream
);
2853 saved_doc_string_length
= i
;
2856 /* Skip that many bytes. */
2857 skip_dyn_bytes (readcharfun
, nskip
);
2863 /* #! appears at the beginning of an executable file.
2864 Skip the first line. */
2865 while (c
!= '\n' && c
>= 0)
2870 return Vload_file_name
;
2872 return list2 (Qfunction
, read0 (readcharfun
));
2873 /* #:foo is the uninterned symbol named foo. */
2876 uninterned_symbol
= 1;
2879 && c
!= NO_BREAK_SPACE
2881 || strchr ("\"';()[]#`,", c
) == NULL
)))
2883 /* No symbol character follows, this is the empty
2886 return Fmake_symbol (empty_unibyte_string
);
2890 /* ## is the empty symbol. */
2892 return Fintern (empty_unibyte_string
, Qnil
);
2893 /* Reader forms that can reuse previously read objects. */
2894 if (c
>= '0' && c
<= '9')
2898 bool overflow
= false;
2900 /* Read a non-negative integer. */
2901 while (c
>= '0' && c
<= '9')
2903 overflow
|= INT_MULTIPLY_WRAPV (n
, 10, &n
);
2904 overflow
|= INT_ADD_WRAPV (n
, c
- '0', &n
);
2908 if (!overflow
&& n
<= MOST_POSITIVE_FIXNUM
)
2910 if (c
== 'r' || c
== 'R')
2911 return read_integer (readcharfun
, n
);
2913 if (! NILP (Vread_circle
))
2915 /* #n=object returns object, but associates it with
2919 /* Make a placeholder for #n# to use temporarily. */
2920 AUTO_CONS (placeholder
, Qnil
, Qnil
);
2921 Lisp_Object cell
= Fcons (make_number (n
), placeholder
);
2922 read_objects
= Fcons (cell
, read_objects
);
2924 /* Read the object itself. */
2925 tem
= read0 (readcharfun
);
2927 /* Now put it everywhere the placeholder was... */
2928 substitute_object_in_subtree (tem
, placeholder
);
2930 /* ...and #n# will use the real value from now on. */
2931 Fsetcdr (cell
, tem
);
2936 /* #n# returns a previously read object. */
2939 tem
= Fassq (make_number (n
), read_objects
);
2945 /* Fall through to error message. */
2947 else if (c
== 'x' || c
== 'X')
2948 return read_integer (readcharfun
, 16);
2949 else if (c
== 'o' || c
== 'O')
2950 return read_integer (readcharfun
, 8);
2951 else if (c
== 'b' || c
== 'B')
2952 return read_integer (readcharfun
, 2);
2955 invalid_syntax ("#");
2958 while ((c
= READCHAR
) >= 0 && c
!= '\n');
2962 return list2 (Qquote
, read0 (readcharfun
));
2966 int next_char
= READCHAR
;
2968 /* Transition from old-style to new-style:
2969 If we see "(`" it used to mean old-style, which usually works
2970 fine because ` should almost never appear in such a position
2971 for new-style. But occasionally we need "(`" to mean new
2972 style, so we try to distinguish the two by the fact that we
2973 can either write "( `foo" or "(` foo", where the first
2974 intends to use new-style whereas the second intends to use
2975 old-style. For Emacs-25, we should completely remove this
2976 first_in_list exception (old-style can still be obtained via
2978 if (!new_backquote_flag
&& first_in_list
&& next_char
== ' ')
2980 Vold_style_backquotes
= Qt
;
2986 bool saved_new_backquote_flag
= new_backquote_flag
;
2988 new_backquote_flag
= 1;
2989 value
= read0 (readcharfun
);
2990 new_backquote_flag
= saved_new_backquote_flag
;
2992 return list2 (Qbackquote
, value
);
2997 int next_char
= READCHAR
;
2999 /* Transition from old-style to new-style:
3000 It used to be impossible to have a new-style , other than within
3001 a new-style `. This is sufficient when ` and , are used in the
3002 normal way, but ` and , can also appear in args to macros that
3003 will not interpret them in the usual way, in which case , may be
3004 used without any ` anywhere near.
3005 So we now use the same heuristic as for backquote: old-style
3006 unquotes are only recognized when first on a list, and when
3007 followed by a space.
3008 Because it's more difficult to peek 2 chars ahead, a new-style
3009 ,@ can still not be used outside of a `, unless it's in the middle
3011 if (new_backquote_flag
3013 || (next_char
!= ' ' && next_char
!= '@'))
3015 Lisp_Object comma_type
= Qnil
;
3020 comma_type
= Qcomma_at
;
3022 comma_type
= Qcomma_dot
;
3025 if (ch
>= 0) UNREAD (ch
);
3026 comma_type
= Qcomma
;
3029 value
= read0 (readcharfun
);
3030 return list2 (comma_type
, value
);
3034 Vold_style_backquotes
= Qt
;
3046 end_of_file_error ();
3048 /* Accept `single space' syntax like (list ? x) where the
3049 whitespace character is SPC or TAB.
3050 Other literal whitespace like NL, CR, and FF are not accepted,
3051 as there are well-established escape sequences for these. */
3052 if (c
== ' ' || c
== '\t')
3053 return make_number (c
);
3056 c
= read_escape (readcharfun
, 0);
3057 modifiers
= c
& CHAR_MODIFIER_MASK
;
3058 c
&= ~CHAR_MODIFIER_MASK
;
3059 if (CHAR_BYTE8_P (c
))
3060 c
= CHAR_TO_BYTE8 (c
);
3063 next_char
= READCHAR
;
3064 ok
= (next_char
<= 040
3065 || (next_char
< 0200
3066 && strchr ("\"';()[]#?`,.", next_char
) != NULL
));
3069 return make_number (c
);
3071 invalid_syntax ("?");
3076 char *p
= read_buffer
;
3077 char *end
= read_buffer
+ read_buffer_size
;
3079 /* True if we saw an escape sequence specifying
3080 a multibyte character. */
3081 bool force_multibyte
= 0;
3082 /* True if we saw an escape sequence specifying
3083 a single-byte character. */
3084 bool force_singlebyte
= 0;
3086 ptrdiff_t nchars
= 0;
3088 while ((ch
= READCHAR
) >= 0
3091 if (end
- p
< MAX_MULTIBYTE_LENGTH
)
3093 ptrdiff_t offset
= p
- read_buffer
;
3094 grow_read_buffer ();
3095 p
= read_buffer
+ offset
;
3096 end
= read_buffer
+ read_buffer_size
;
3103 ch
= read_escape (readcharfun
, 1);
3105 /* CH is -1 if \ newline or \ space has just been seen. */
3108 if (p
== read_buffer
)
3113 modifiers
= ch
& CHAR_MODIFIER_MASK
;
3114 ch
= ch
& ~CHAR_MODIFIER_MASK
;
3116 if (CHAR_BYTE8_P (ch
))
3117 force_singlebyte
= 1;
3118 else if (! ASCII_CHAR_P (ch
))
3119 force_multibyte
= 1;
3120 else /* I.e. ASCII_CHAR_P (ch). */
3122 /* Allow `\C- ' and `\C-?'. */
3123 if (modifiers
== CHAR_CTL
)
3126 ch
= 0, modifiers
= 0;
3128 ch
= 127, modifiers
= 0;
3130 if (modifiers
& CHAR_SHIFT
)
3132 /* Shift modifier is valid only with [A-Za-z]. */
3133 if (ch
>= 'A' && ch
<= 'Z')
3134 modifiers
&= ~CHAR_SHIFT
;
3135 else if (ch
>= 'a' && ch
<= 'z')
3136 ch
-= ('a' - 'A'), modifiers
&= ~CHAR_SHIFT
;
3139 if (modifiers
& CHAR_META
)
3141 /* Move the meta bit to the right place for a
3143 modifiers
&= ~CHAR_META
;
3144 ch
= BYTE8_TO_CHAR (ch
| 0x80);
3145 force_singlebyte
= 1;
3149 /* Any modifiers remaining are invalid. */
3151 error ("Invalid modifier in string");
3152 p
+= CHAR_STRING (ch
, (unsigned char *) p
);
3156 p
+= CHAR_STRING (ch
, (unsigned char *) p
);
3157 if (CHAR_BYTE8_P (ch
))
3158 force_singlebyte
= 1;
3159 else if (! ASCII_CHAR_P (ch
))
3160 force_multibyte
= 1;
3166 end_of_file_error ();
3168 /* If purifying, and string starts with \ newline,
3169 return zero instead. This is for doc strings
3170 that we are really going to find in etc/DOC.nn.nn. */
3171 if (!NILP (Vpurify_flag
) && NILP (Vdoc_file_name
) && cancel
)
3172 return make_number (0);
3174 if (! force_multibyte
&& force_singlebyte
)
3176 /* READ_BUFFER contains raw 8-bit bytes and no multibyte
3177 forms. Convert it to unibyte. */
3178 nchars
= str_as_unibyte ((unsigned char *) read_buffer
,
3180 p
= read_buffer
+ nchars
;
3183 return make_specified_string (read_buffer
, nchars
, p
- read_buffer
,
3185 || (p
- read_buffer
!= nchars
)));
3190 int next_char
= READCHAR
;
3193 if (next_char
<= 040
3194 || (next_char
< 0200
3195 && strchr ("\"';([#?`,", next_char
) != NULL
))
3201 /* Otherwise, we fall through! Note that the atom-reading loop
3202 below will now loop at least once, assuring that we will not
3203 try to UNREAD two characters in a row. */
3207 if (c
<= 040) goto retry
;
3208 if (c
== NO_BREAK_SPACE
)
3213 char *p
= read_buffer
;
3215 EMACS_INT start_position
= readchar_count
- 1;
3218 char *end
= read_buffer
+ read_buffer_size
;
3222 if (end
- p
< MAX_MULTIBYTE_LENGTH
)
3224 ptrdiff_t offset
= p
- read_buffer
;
3225 grow_read_buffer ();
3226 p
= read_buffer
+ offset
;
3227 end
= read_buffer
+ read_buffer_size
;
3234 end_of_file_error ();
3239 p
+= CHAR_STRING (c
, (unsigned char *) p
);
3245 && c
!= NO_BREAK_SPACE
3247 || strchr ("\"';()[]#`,", c
) == NULL
));
3251 ptrdiff_t offset
= p
- read_buffer
;
3252 grow_read_buffer ();
3253 p
= read_buffer
+ offset
;
3254 end
= read_buffer
+ read_buffer_size
;
3260 if (!quoted
&& !uninterned_symbol
)
3262 Lisp_Object result
= string_to_number (read_buffer
, 10, 0);
3263 if (! NILP (result
))
3267 Lisp_Object name
, result
;
3268 ptrdiff_t nbytes
= p
- read_buffer
;
3271 ? multibyte_chars_in_text ((unsigned char *) read_buffer
,
3275 name
= ((uninterned_symbol
&& ! NILP (Vpurify_flag
)
3276 ? make_pure_string
: make_specified_string
)
3277 (read_buffer
, nchars
, nbytes
, multibyte
));
3278 result
= (uninterned_symbol
? Fmake_symbol (name
)
3279 : Fintern (name
, Qnil
));
3281 if (EQ (Vread_with_symbol_positions
, Qt
)
3282 || EQ (Vread_with_symbol_positions
, readcharfun
))
3283 Vread_symbol_positions_list
3284 = Fcons (Fcons (result
, make_number (start_position
)),
3285 Vread_symbol_positions_list
);
3293 /* List of nodes we've seen during substitute_object_in_subtree. */
3294 static Lisp_Object seen_list
;
3297 substitute_object_in_subtree (Lisp_Object object
, Lisp_Object placeholder
)
3299 Lisp_Object check_object
;
3301 /* We haven't seen any objects when we start. */
3304 /* Make all the substitutions. */
3306 = substitute_object_recurse (object
, placeholder
, object
);
3308 /* Clear seen_list because we're done with it. */
3311 /* The returned object here is expected to always eq the
3313 if (!EQ (check_object
, object
))
3314 error ("Unexpected mutation error in reader");
3317 /* Feval doesn't get called from here, so no gc protection is needed. */
3318 #define SUBSTITUTE(get_val, set_val) \
3320 Lisp_Object old_value = get_val; \
3321 Lisp_Object true_value \
3322 = substitute_object_recurse (object, placeholder, \
3325 if (!EQ (old_value, true_value)) \
3332 substitute_object_recurse (Lisp_Object object
, Lisp_Object placeholder
, Lisp_Object subtree
)
3334 /* If we find the placeholder, return the target object. */
3335 if (EQ (placeholder
, subtree
))
3338 /* If we've been to this node before, don't explore it again. */
3339 if (!EQ (Qnil
, Fmemq (subtree
, seen_list
)))
3342 /* If this node can be the entry point to a cycle, remember that
3343 we've seen it. It can only be such an entry point if it was made
3344 by #n=, which means that we can find it as a value in
3346 if (!EQ (Qnil
, Frassq (subtree
, read_objects
)))
3347 seen_list
= Fcons (subtree
, seen_list
);
3349 /* Recurse according to subtree's type.
3350 Every branch must return a Lisp_Object. */
3351 switch (XTYPE (subtree
))
3353 case Lisp_Vectorlike
:
3355 ptrdiff_t i
= 0, length
= 0;
3356 if (BOOL_VECTOR_P (subtree
))
3357 return subtree
; /* No sub-objects anyway. */
3358 else if (CHAR_TABLE_P (subtree
) || SUB_CHAR_TABLE_P (subtree
)
3359 || COMPILEDP (subtree
) || HASH_TABLE_P (subtree
))
3360 length
= ASIZE (subtree
) & PSEUDOVECTOR_SIZE_MASK
;
3361 else if (VECTORP (subtree
))
3362 length
= ASIZE (subtree
);
3364 /* An unknown pseudovector may contain non-Lisp fields, so we
3365 can't just blindly traverse all its fields. We used to call
3366 `Flength' which signaled `sequencep', so I just preserved this
3368 wrong_type_argument (Qsequencep
, subtree
);
3370 if (SUB_CHAR_TABLE_P (subtree
))
3372 for ( ; i
< length
; i
++)
3373 SUBSTITUTE (AREF (subtree
, i
),
3374 ASET (subtree
, i
, true_value
));
3380 SUBSTITUTE (XCAR (subtree
),
3381 XSETCAR (subtree
, true_value
));
3382 SUBSTITUTE (XCDR (subtree
),
3383 XSETCDR (subtree
, true_value
));
3389 /* Check for text properties in each interval.
3390 substitute_in_interval contains part of the logic. */
3392 INTERVAL root_interval
= string_intervals (subtree
);
3393 AUTO_CONS (arg
, object
, placeholder
);
3395 traverse_intervals_noorder (root_interval
,
3396 &substitute_in_interval
, arg
);
3401 /* Other types don't recurse any further. */
3407 /* Helper function for substitute_object_recurse. */
3409 substitute_in_interval (INTERVAL interval
, Lisp_Object arg
)
3411 Lisp_Object object
= Fcar (arg
);
3412 Lisp_Object placeholder
= Fcdr (arg
);
3414 SUBSTITUTE (interval
->plist
, set_interval_plist (interval
, true_value
));
3424 /* Convert STRING to a number, assuming base BASE. Return a fixnum if CP has
3425 integer syntax and fits in a fixnum, else return the nearest float if CP has
3426 either floating point or integer syntax and BASE is 10, else return nil. If
3427 IGNORE_TRAILING, consider just the longest prefix of CP that has
3428 valid floating point syntax. Signal an overflow if BASE is not 10 and the
3429 number has integer syntax but does not fit. */
3432 string_to_number (char const *string
, int base
, bool ignore_trailing
)
3435 char const *cp
= string
;
3437 bool float_syntax
= 0;
3440 /* Negate the value ourselves. This treats 0, NaNs, and infinity properly on
3441 IEEE floating point hosts, and works around a formerly-common bug where
3442 atof ("-0.0") drops the sign. */
3443 bool negative
= *cp
== '-';
3445 bool signedp
= negative
|| *cp
== '+';
3450 leading_digit
= digit_to_number (*cp
, base
);
3451 if (leading_digit
>= 0)
3456 while (digit_to_number (*cp
, base
) >= 0);
3466 if ('0' <= *cp
&& *cp
<= '9')
3471 while ('0' <= *cp
&& *cp
<= '9');
3473 if (*cp
== 'e' || *cp
== 'E')
3475 char const *ecp
= cp
;
3477 if (*cp
== '+' || *cp
== '-')
3479 if ('0' <= *cp
&& *cp
<= '9')
3484 while ('0' <= *cp
&& *cp
<= '9');
3486 else if (cp
[-1] == '+'
3487 && cp
[0] == 'I' && cp
[1] == 'N' && cp
[2] == 'F')
3493 else if (cp
[-1] == '+'
3494 && cp
[0] == 'N' && cp
[1] == 'a' && cp
[2] == 'N')
3498 /* NAN is a "positive" NaN on all known Emacs hosts. */
3505 float_syntax
= ((state
& (DOT_CHAR
|TRAIL_INT
)) == (DOT_CHAR
|TRAIL_INT
)
3506 || state
== (LEAD_INT
|E_EXP
));
3509 /* Return nil if the number uses invalid syntax. If IGNORE_TRAILING, accept
3510 any prefix that matches. Otherwise, the entire string must match. */
3511 if (! (ignore_trailing
3512 ? ((state
& LEAD_INT
) != 0 || float_syntax
)
3513 : (!*cp
&& ((state
& ~DOT_CHAR
) == LEAD_INT
|| float_syntax
))))
3516 /* If the number uses integer and not float syntax, and is in C-language
3517 range, use its value, preferably as a fixnum. */
3518 if (leading_digit
>= 0 && ! float_syntax
)
3522 /* Fast special case for single-digit integers. This also avoids a
3523 glitch when BASE is 16 and IGNORE_TRAILING, because in that
3524 case some versions of strtoumax accept numbers like "0x1" that Emacs
3526 if (digit_to_number (string
[signedp
+ 1], base
) < 0)
3527 return make_number (negative
? -leading_digit
: leading_digit
);
3530 n
= strtoumax (string
+ signedp
, NULL
, base
);
3531 if (errno
== ERANGE
)
3533 /* Unfortunately there's no simple and accurate way to convert
3534 non-base-10 numbers that are out of C-language range. */
3536 xsignal1 (Qoverflow_error
, build_string (string
));
3538 else if (n
<= (negative
? -MOST_NEGATIVE_FIXNUM
: MOST_POSITIVE_FIXNUM
))
3540 EMACS_INT signed_n
= n
;
3541 return make_number (negative
? -signed_n
: signed_n
);
3547 /* Either the number uses float syntax, or it does not fit into a fixnum.
3548 Convert it from string to floating point, unless the value is already
3549 known because it is an infinity, a NAN, or its absolute value fits in
3552 value
= atof (string
+ signedp
);
3554 return make_float (negative
? -value
: value
);
3559 read_vector (Lisp_Object readcharfun
, bool bytecodeflag
)
3563 Lisp_Object tem
, item
, vector
;
3564 struct Lisp_Cons
*otem
;
3567 tem
= read_list (1, readcharfun
);
3568 len
= Flength (tem
);
3569 vector
= Fmake_vector (len
, Qnil
);
3571 size
= ASIZE (vector
);
3572 ptr
= XVECTOR (vector
)->contents
;
3573 for (i
= 0; i
< size
; i
++)
3576 /* If `load-force-doc-strings' is t when reading a lazily-loaded
3577 bytecode object, the docstring containing the bytecode and
3578 constants values must be treated as unibyte and passed to
3579 Fread, to get the actual bytecode string and constants vector. */
3580 if (bytecodeflag
&& load_force_doc_strings
)
3582 if (i
== COMPILED_BYTECODE
)
3584 if (!STRINGP (item
))
3585 error ("Invalid byte code");
3587 /* Delay handling the bytecode slot until we know whether
3588 it is lazily-loaded (we can tell by whether the
3589 constants slot is nil). */
3590 ASET (vector
, COMPILED_CONSTANTS
, item
);
3593 else if (i
== COMPILED_CONSTANTS
)
3595 Lisp_Object bytestr
= ptr
[COMPILED_CONSTANTS
];
3599 /* Coerce string to unibyte (like string-as-unibyte,
3600 but without generating extra garbage and
3601 guaranteeing no change in the contents). */
3602 STRING_SET_CHARS (bytestr
, SBYTES (bytestr
));
3603 STRING_SET_UNIBYTE (bytestr
);
3605 item
= Fread (Fcons (bytestr
, readcharfun
));
3607 error ("Invalid byte code");
3609 otem
= XCONS (item
);
3610 bytestr
= XCAR (item
);
3615 /* Now handle the bytecode slot. */
3616 ASET (vector
, COMPILED_BYTECODE
, bytestr
);
3618 else if (i
== COMPILED_DOC_STRING
3620 && ! STRING_MULTIBYTE (item
))
3622 if (EQ (readcharfun
, Qget_emacs_mule_file_char
))
3623 item
= Fdecode_coding_string (item
, Qemacs_mule
, Qnil
, Qnil
);
3625 item
= Fstring_as_multibyte (item
);
3628 ASET (vector
, i
, item
);
3636 /* FLAG means check for ']' to terminate rather than ')' and '.'. */
3639 read_list (bool flag
, Lisp_Object readcharfun
)
3641 Lisp_Object val
, tail
;
3642 Lisp_Object elt
, tem
;
3643 /* 0 is the normal case.
3644 1 means this list is a doc reference; replace it with the number 0.
3645 2 means this list is a doc reference; replace it with the doc string. */
3646 int doc_reference
= 0;
3648 /* Initialize this to 1 if we are reading a list. */
3649 bool first_in_list
= flag
<= 0;
3657 elt
= read1 (readcharfun
, &ch
, first_in_list
);
3661 /* While building, if the list starts with #$, treat it specially. */
3662 if (EQ (elt
, Vload_file_name
)
3664 && !NILP (Vpurify_flag
))
3666 if (NILP (Vdoc_file_name
))
3667 /* We have not yet called Snarf-documentation, so assume
3668 this file is described in the DOC file
3669 and Snarf-documentation will fill in the right value later.
3670 For now, replace the whole list with 0. */
3673 /* We have already called Snarf-documentation, so make a relative
3674 file name for this file, so it can be found properly
3675 in the installed Lisp directory.
3676 We don't use Fexpand_file_name because that would make
3677 the directory absolute now. */
3679 AUTO_STRING (dot_dot_lisp
, "../lisp/");
3680 elt
= concat2 (dot_dot_lisp
, Ffile_name_nondirectory (elt
));
3683 else if (EQ (elt
, Vload_file_name
)
3685 && load_force_doc_strings
)
3694 invalid_syntax (") or . in a vector");
3701 XSETCDR (tail
, read0 (readcharfun
));
3703 val
= read0 (readcharfun
);
3704 read1 (readcharfun
, &ch
, 0);
3708 if (doc_reference
== 1)
3709 return make_number (0);
3710 if (doc_reference
== 2 && INTEGERP (XCDR (val
)))
3713 file_offset saved_position
;
3714 /* Get a doc string from the file we are loading.
3715 If it's in saved_doc_string, get it from there.
3717 Here, we don't know if the string is a
3718 bytecode string or a doc string. As a
3719 bytecode string must be unibyte, we always
3720 return a unibyte string. If it is actually a
3721 doc string, caller must make it
3724 /* Position is negative for user variables. */
3725 EMACS_INT pos
= eabs (XINT (XCDR (val
)));
3726 if (pos
>= saved_doc_string_position
3727 && pos
< (saved_doc_string_position
3728 + saved_doc_string_length
))
3730 saved
= saved_doc_string
;
3731 saved_position
= saved_doc_string_position
;
3733 /* Look in prev_saved_doc_string the same way. */
3734 else if (pos
>= prev_saved_doc_string_position
3735 && pos
< (prev_saved_doc_string_position
3736 + prev_saved_doc_string_length
))
3738 saved
= prev_saved_doc_string
;
3739 saved_position
= prev_saved_doc_string_position
;
3743 ptrdiff_t start
= pos
- saved_position
;
3746 /* Process quoting with ^A,
3747 and find the end of the string,
3748 which is marked with ^_ (037). */
3749 for (from
= start
, to
= start
;
3750 saved
[from
] != 037;)
3752 int c
= saved
[from
++];
3756 saved
[to
++] = (c
== 1 ? c
3765 return make_unibyte_string (saved
+ start
,
3769 return get_doc_string (val
, 1, 0);
3774 invalid_syntax (". in wrong context");
3776 invalid_syntax ("] in a list");
3780 XSETCDR (tail
, tem
);
3787 static Lisp_Object initial_obarray
;
3789 /* `oblookup' stores the bucket number here, for the sake of Funintern. */
3791 static size_t oblookup_last_bucket_number
;
3793 /* Get an error if OBARRAY is not an obarray.
3794 If it is one, return it. */
3797 check_obarray (Lisp_Object obarray
)
3799 /* We don't want to signal a wrong-type-argument error when we are
3800 shutting down due to a fatal error, and we don't want to hit
3801 assertions in VECTORP and ASIZE if the fatal error was during GC. */
3802 if (!fatal_error_in_progress
3803 && (!VECTORP (obarray
) || ASIZE (obarray
) == 0))
3805 /* If Vobarray is now invalid, force it to be valid. */
3806 if (EQ (Vobarray
, obarray
)) Vobarray
= initial_obarray
;
3807 wrong_type_argument (Qvectorp
, obarray
);
3812 /* Intern symbol SYM in OBARRAY using bucket INDEX. */
3815 intern_sym (Lisp_Object sym
, Lisp_Object obarray
, Lisp_Object index
)
3819 XSYMBOL (sym
)->interned
= (EQ (obarray
, initial_obarray
)
3820 ? SYMBOL_INTERNED_IN_INITIAL_OBARRAY
3823 if (SREF (SYMBOL_NAME (sym
), 0) == ':' && EQ (obarray
, initial_obarray
))
3825 XSYMBOL (sym
)->constant
= 1;
3826 XSYMBOL (sym
)->redirect
= SYMBOL_PLAINVAL
;
3827 SET_SYMBOL_VAL (XSYMBOL (sym
), sym
);
3830 ptr
= aref_addr (obarray
, XINT (index
));
3831 set_symbol_next (sym
, SYMBOLP (*ptr
) ? XSYMBOL (*ptr
) : NULL
);
3836 /* Intern a symbol with name STRING in OBARRAY using bucket INDEX. */
3839 intern_driver (Lisp_Object string
, Lisp_Object obarray
, Lisp_Object index
)
3841 return intern_sym (Fmake_symbol (string
), obarray
, index
);
3844 /* Intern the C string STR: return a symbol with that name,
3845 interned in the current obarray. */
3848 intern_1 (const char *str
, ptrdiff_t len
)
3850 Lisp_Object obarray
= check_obarray (Vobarray
);
3851 Lisp_Object tem
= oblookup (obarray
, str
, len
, len
);
3853 return (SYMBOLP (tem
) ? tem
3854 /* The above `oblookup' was done on the basis of nchars==nbytes, so
3855 the string has to be unibyte. */
3856 : intern_driver (make_unibyte_string (str
, len
),
3861 intern_c_string_1 (const char *str
, ptrdiff_t len
)
3863 Lisp_Object obarray
= check_obarray (Vobarray
);
3864 Lisp_Object tem
= oblookup (obarray
, str
, len
, len
);
3868 /* Creating a non-pure string from a string literal not implemented yet.
3869 We could just use make_string here and live with the extra copy. */
3870 eassert (!NILP (Vpurify_flag
));
3871 tem
= intern_driver (make_pure_c_string (str
, len
), obarray
, tem
);
3877 define_symbol (Lisp_Object sym
, char const *str
)
3879 ptrdiff_t len
= strlen (str
);
3880 Lisp_Object string
= make_pure_c_string (str
, len
);
3881 init_symbol (sym
, string
);
3883 /* Qunbound is uninterned, so that it's not confused with any symbol
3884 'unbound' created by a Lisp program. */
3885 if (! EQ (sym
, Qunbound
))
3887 Lisp_Object bucket
= oblookup (initial_obarray
, str
, len
, len
);
3888 eassert (INTEGERP (bucket
));
3889 intern_sym (sym
, initial_obarray
, bucket
);
3893 DEFUN ("intern", Fintern
, Sintern
, 1, 2, 0,
3894 doc
: /* Return the canonical symbol whose name is STRING.
3895 If there is none, one is created by this function and returned.
3896 A second optional argument specifies the obarray to use;
3897 it defaults to the value of `obarray'. */)
3898 (Lisp_Object string
, Lisp_Object obarray
)
3902 obarray
= check_obarray (NILP (obarray
) ? Vobarray
: obarray
);
3903 CHECK_STRING (string
);
3905 tem
= oblookup (obarray
, SSDATA (string
), SCHARS (string
), SBYTES (string
));
3907 tem
= intern_driver (NILP (Vpurify_flag
) ? string
: Fpurecopy (string
),
3912 DEFUN ("intern-soft", Fintern_soft
, Sintern_soft
, 1, 2, 0,
3913 doc
: /* Return the canonical symbol named NAME, or nil if none exists.
3914 NAME may be a string or a symbol. If it is a symbol, that exact
3915 symbol is searched for.
3916 A second optional argument specifies the obarray to use;
3917 it defaults to the value of `obarray'. */)
3918 (Lisp_Object name
, Lisp_Object obarray
)
3920 register Lisp_Object tem
, string
;
3922 if (NILP (obarray
)) obarray
= Vobarray
;
3923 obarray
= check_obarray (obarray
);
3925 if (!SYMBOLP (name
))
3927 CHECK_STRING (name
);
3931 string
= SYMBOL_NAME (name
);
3933 tem
= oblookup (obarray
, SSDATA (string
), SCHARS (string
), SBYTES (string
));
3934 if (INTEGERP (tem
) || (SYMBOLP (name
) && !EQ (name
, tem
)))
3940 DEFUN ("unintern", Funintern
, Sunintern
, 1, 2, 0,
3941 doc
: /* Delete the symbol named NAME, if any, from OBARRAY.
3942 The value is t if a symbol was found and deleted, nil otherwise.
3943 NAME may be a string or a symbol. If it is a symbol, that symbol
3944 is deleted, if it belongs to OBARRAY--no other symbol is deleted.
3945 OBARRAY, if nil, defaults to the value of the variable `obarray'.
3946 usage: (unintern NAME OBARRAY) */)
3947 (Lisp_Object name
, Lisp_Object obarray
)
3949 register Lisp_Object string
, tem
;
3952 if (NILP (obarray
)) obarray
= Vobarray
;
3953 obarray
= check_obarray (obarray
);
3956 string
= SYMBOL_NAME (name
);
3959 CHECK_STRING (name
);
3963 tem
= oblookup (obarray
, SSDATA (string
),
3968 /* If arg was a symbol, don't delete anything but that symbol itself. */
3969 if (SYMBOLP (name
) && !EQ (name
, tem
))
3972 /* There are plenty of other symbols which will screw up the Emacs
3973 session if we unintern them, as well as even more ways to use
3974 `setq' or `fset' or whatnot to make the Emacs session
3975 unusable. Let's not go down this silly road. --Stef */
3976 /* if (EQ (tem, Qnil) || EQ (tem, Qt))
3977 error ("Attempt to unintern t or nil"); */
3979 XSYMBOL (tem
)->interned
= SYMBOL_UNINTERNED
;
3981 hash
= oblookup_last_bucket_number
;
3983 if (EQ (AREF (obarray
, hash
), tem
))
3985 if (XSYMBOL (tem
)->next
)
3988 XSETSYMBOL (sym
, XSYMBOL (tem
)->next
);
3989 ASET (obarray
, hash
, sym
);
3992 ASET (obarray
, hash
, make_number (0));
3996 Lisp_Object tail
, following
;
3998 for (tail
= AREF (obarray
, hash
);
3999 XSYMBOL (tail
)->next
;
4002 XSETSYMBOL (following
, XSYMBOL (tail
)->next
);
4003 if (EQ (following
, tem
))
4005 set_symbol_next (tail
, XSYMBOL (following
)->next
);
4014 /* Return the symbol in OBARRAY whose names matches the string
4015 of SIZE characters (SIZE_BYTE bytes) at PTR.
4016 If there is no such symbol, return the integer bucket number of
4017 where the symbol would be if it were present.
4019 Also store the bucket number in oblookup_last_bucket_number. */
4022 oblookup (Lisp_Object obarray
, register const char *ptr
, ptrdiff_t size
, ptrdiff_t size_byte
)
4026 register Lisp_Object tail
;
4027 Lisp_Object bucket
, tem
;
4029 obarray
= check_obarray (obarray
);
4030 /* This is sometimes needed in the middle of GC. */
4031 obsize
= gc_asize (obarray
);
4032 hash
= hash_string (ptr
, size_byte
) % obsize
;
4033 bucket
= AREF (obarray
, hash
);
4034 oblookup_last_bucket_number
= hash
;
4035 if (EQ (bucket
, make_number (0)))
4037 else if (!SYMBOLP (bucket
))
4038 error ("Bad data in guts of obarray"); /* Like CADR error message. */
4040 for (tail
= bucket
; ; XSETSYMBOL (tail
, XSYMBOL (tail
)->next
))
4042 if (SBYTES (SYMBOL_NAME (tail
)) == size_byte
4043 && SCHARS (SYMBOL_NAME (tail
)) == size
4044 && !memcmp (SDATA (SYMBOL_NAME (tail
)), ptr
, size_byte
))
4046 else if (XSYMBOL (tail
)->next
== 0)
4049 XSETINT (tem
, hash
);
4054 map_obarray (Lisp_Object obarray
, void (*fn
) (Lisp_Object
, Lisp_Object
), Lisp_Object arg
)
4057 register Lisp_Object tail
;
4058 CHECK_VECTOR (obarray
);
4059 for (i
= ASIZE (obarray
) - 1; i
>= 0; i
--)
4061 tail
= AREF (obarray
, i
);
4066 if (XSYMBOL (tail
)->next
== 0)
4068 XSETSYMBOL (tail
, XSYMBOL (tail
)->next
);
4074 mapatoms_1 (Lisp_Object sym
, Lisp_Object function
)
4076 call1 (function
, sym
);
4079 DEFUN ("mapatoms", Fmapatoms
, Smapatoms
, 1, 2, 0,
4080 doc
: /* Call FUNCTION on every symbol in OBARRAY.
4081 OBARRAY defaults to the value of `obarray'. */)
4082 (Lisp_Object function
, Lisp_Object obarray
)
4084 if (NILP (obarray
)) obarray
= Vobarray
;
4085 obarray
= check_obarray (obarray
);
4087 map_obarray (obarray
, mapatoms_1
, function
);
4091 #define OBARRAY_SIZE 1511
4096 Lisp_Object oblength
;
4097 ptrdiff_t size
= 100 + MAX_MULTIBYTE_LENGTH
;
4099 XSETFASTINT (oblength
, OBARRAY_SIZE
);
4101 Vobarray
= Fmake_vector (oblength
, make_number (0));
4102 initial_obarray
= Vobarray
;
4103 staticpro (&initial_obarray
);
4105 for (int i
= 0; i
< ARRAYELTS (lispsym
); i
++)
4106 define_symbol (builtin_lisp_symbol (i
), defsym_name
[i
]);
4108 DEFSYM (Qunbound
, "unbound");
4110 DEFSYM (Qnil
, "nil");
4111 SET_SYMBOL_VAL (XSYMBOL (Qnil
), Qnil
);
4112 XSYMBOL (Qnil
)->constant
= 1;
4113 XSYMBOL (Qnil
)->declared_special
= true;
4116 SET_SYMBOL_VAL (XSYMBOL (Qt
), Qt
);
4117 XSYMBOL (Qt
)->constant
= 1;
4118 XSYMBOL (Qt
)->declared_special
= true;
4120 /* Qt is correct even if CANNOT_DUMP. loadup.el will set to nil at end. */
4123 DEFSYM (Qvariable_documentation
, "variable-documentation");
4125 read_buffer
= xmalloc (size
);
4126 read_buffer_size
= size
;
4130 defsubr (struct Lisp_Subr
*sname
)
4132 Lisp_Object sym
, tem
;
4133 sym
= intern_c_string (sname
->symbol_name
);
4134 XSETPVECTYPE (sname
, PVEC_SUBR
);
4135 XSETSUBR (tem
, sname
);
4136 set_symbol_function (sym
, tem
);
4139 #ifdef NOTDEF /* Use fset in subr.el now! */
4141 defalias (struct Lisp_Subr
*sname
, char *string
)
4144 sym
= intern (string
);
4145 XSETSUBR (XSYMBOL (sym
)->function
, sname
);
4149 /* Define an "integer variable"; a symbol whose value is forwarded to a
4150 C variable of type EMACS_INT. Sample call (with "xx" to fool make-docfile):
4151 DEFxxVAR_INT ("emacs-priority", &emacs_priority, "Documentation"); */
4153 defvar_int (struct Lisp_Intfwd
*i_fwd
,
4154 const char *namestring
, EMACS_INT
*address
)
4157 sym
= intern_c_string (namestring
);
4158 i_fwd
->type
= Lisp_Fwd_Int
;
4159 i_fwd
->intvar
= address
;
4160 XSYMBOL (sym
)->declared_special
= 1;
4161 XSYMBOL (sym
)->redirect
= SYMBOL_FORWARDED
;
4162 SET_SYMBOL_FWD (XSYMBOL (sym
), (union Lisp_Fwd
*)i_fwd
);
4165 /* Similar but define a variable whose value is t if address contains 1,
4166 nil if address contains 0. */
4168 defvar_bool (struct Lisp_Boolfwd
*b_fwd
,
4169 const char *namestring
, bool *address
)
4172 sym
= intern_c_string (namestring
);
4173 b_fwd
->type
= Lisp_Fwd_Bool
;
4174 b_fwd
->boolvar
= address
;
4175 XSYMBOL (sym
)->declared_special
= 1;
4176 XSYMBOL (sym
)->redirect
= SYMBOL_FORWARDED
;
4177 SET_SYMBOL_FWD (XSYMBOL (sym
), (union Lisp_Fwd
*)b_fwd
);
4178 Vbyte_boolean_vars
= Fcons (sym
, Vbyte_boolean_vars
);
4181 /* Similar but define a variable whose value is the Lisp Object stored
4182 at address. Two versions: with and without gc-marking of the C
4183 variable. The nopro version is used when that variable will be
4184 gc-marked for some other reason, since marking the same slot twice
4185 can cause trouble with strings. */
4187 defvar_lisp_nopro (struct Lisp_Objfwd
*o_fwd
,
4188 const char *namestring
, Lisp_Object
*address
)
4191 sym
= intern_c_string (namestring
);
4192 o_fwd
->type
= Lisp_Fwd_Obj
;
4193 o_fwd
->objvar
= address
;
4194 XSYMBOL (sym
)->declared_special
= 1;
4195 XSYMBOL (sym
)->redirect
= SYMBOL_FORWARDED
;
4196 SET_SYMBOL_FWD (XSYMBOL (sym
), (union Lisp_Fwd
*)o_fwd
);
4200 defvar_lisp (struct Lisp_Objfwd
*o_fwd
,
4201 const char *namestring
, Lisp_Object
*address
)
4203 defvar_lisp_nopro (o_fwd
, namestring
, address
);
4204 staticpro (address
);
4207 /* Similar but define a variable whose value is the Lisp Object stored
4208 at a particular offset in the current kboard object. */
4211 defvar_kboard (struct Lisp_Kboard_Objfwd
*ko_fwd
,
4212 const char *namestring
, int offset
)
4215 sym
= intern_c_string (namestring
);
4216 ko_fwd
->type
= Lisp_Fwd_Kboard_Obj
;
4217 ko_fwd
->offset
= offset
;
4218 XSYMBOL (sym
)->declared_special
= 1;
4219 XSYMBOL (sym
)->redirect
= SYMBOL_FORWARDED
;
4220 SET_SYMBOL_FWD (XSYMBOL (sym
), (union Lisp_Fwd
*)ko_fwd
);
4223 /* Check that the elements of lpath exist. */
4226 load_path_check (Lisp_Object lpath
)
4228 Lisp_Object path_tail
;
4230 /* The only elements that might not exist are those from
4231 PATH_LOADSEARCH, EMACSLOADPATH. Anything else is only added if
4233 for (path_tail
= lpath
; !NILP (path_tail
); path_tail
= XCDR (path_tail
))
4235 Lisp_Object dirfile
;
4236 dirfile
= Fcar (path_tail
);
4237 if (STRINGP (dirfile
))
4239 dirfile
= Fdirectory_file_name (dirfile
);
4240 if (! file_accessible_directory_p (dirfile
))
4241 dir_warning ("Lisp directory", XCAR (path_tail
));
4246 /* Return the default load-path, to be used if EMACSLOADPATH is unset.
4247 This does not include the standard site-lisp directories
4248 under the installation prefix (i.e., PATH_SITELOADSEARCH),
4249 but it does (unless no_site_lisp is set) include site-lisp
4250 directories in the source/build directories if those exist and we
4251 are running uninstalled.
4253 Uses the following logic:
4254 If CANNOT_DUMP: Use PATH_LOADSEARCH.
4255 The remainder is what happens when dumping works:
4256 If purify-flag (ie dumping) just use PATH_DUMPLOADSEARCH.
4257 Otherwise use PATH_LOADSEARCH.
4259 If !initialized, then just return PATH_DUMPLOADSEARCH.
4261 If Vinstallation_directory is not nil (ie, running uninstalled):
4262 If installation-dir/lisp exists and not already a member,
4263 we must be running uninstalled. Reset the load-path
4264 to just installation-dir/lisp. (The default PATH_LOADSEARCH
4265 refers to the eventual installation directories. Since we
4266 are not yet installed, we should not use them, even if they exist.)
4267 If installation-dir/lisp does not exist, just add
4268 PATH_DUMPLOADSEARCH at the end instead.
4269 Add installation-dir/site-lisp (if !no_site_lisp, and exists
4270 and not already a member) at the front.
4271 If installation-dir != source-dir (ie running an uninstalled,
4272 out-of-tree build) AND install-dir/src/Makefile exists BUT
4273 install-dir/src/Makefile.in does NOT exist (this is a sanity
4274 check), then repeat the above steps for source-dir/lisp, site-lisp. */
4277 load_path_default (void)
4279 Lisp_Object lpath
= Qnil
;
4284 const char *loadpath
= ns_load_path ();
4287 normal
= PATH_LOADSEARCH
;
4289 lpath
= decode_env_path (0, loadpath
? loadpath
: normal
, 0);
4291 lpath
= decode_env_path (0, normal
, 0);
4294 #else /* !CANNOT_DUMP */
4296 normal
= NILP (Vpurify_flag
) ? PATH_LOADSEARCH
: PATH_DUMPLOADSEARCH
;
4301 const char *loadpath
= ns_load_path ();
4302 lpath
= decode_env_path (0, loadpath
? loadpath
: normal
, 0);
4304 lpath
= decode_env_path (0, normal
, 0);
4306 if (!NILP (Vinstallation_directory
))
4308 Lisp_Object tem
, tem1
;
4310 /* Add to the path the lisp subdir of the installation
4311 dir, if it is accessible. Note: in out-of-tree builds,
4312 this directory is empty save for Makefile. */
4313 tem
= Fexpand_file_name (build_string ("lisp"),
4314 Vinstallation_directory
);
4315 tem1
= Ffile_accessible_directory_p (tem
);
4318 if (NILP (Fmember (tem
, lpath
)))
4320 /* We are running uninstalled. The default load-path
4321 points to the eventual installed lisp directories.
4322 We should not use those now, even if they exist,
4323 so start over from a clean slate. */
4324 lpath
= list1 (tem
);
4328 /* That dir doesn't exist, so add the build-time
4329 Lisp dirs instead. */
4331 Lisp_Object dump_path
=
4332 decode_env_path (0, PATH_DUMPLOADSEARCH
, 0);
4333 lpath
= nconc2 (lpath
, dump_path
);
4336 /* Add site-lisp under the installation dir, if it exists. */
4339 tem
= Fexpand_file_name (build_string ("site-lisp"),
4340 Vinstallation_directory
);
4341 tem1
= Ffile_accessible_directory_p (tem
);
4344 if (NILP (Fmember (tem
, lpath
)))
4345 lpath
= Fcons (tem
, lpath
);
4349 /* If Emacs was not built in the source directory,
4350 and it is run from where it was built, add to load-path
4351 the lisp and site-lisp dirs under that directory. */
4353 if (NILP (Fequal (Vinstallation_directory
, Vsource_directory
)))
4357 tem
= Fexpand_file_name (build_string ("src/Makefile"),
4358 Vinstallation_directory
);
4359 tem1
= Ffile_exists_p (tem
);
4361 /* Don't be fooled if they moved the entire source tree
4362 AFTER dumping Emacs. If the build directory is indeed
4363 different from the source dir, src/Makefile.in and
4364 src/Makefile will not be found together. */
4365 tem
= Fexpand_file_name (build_string ("src/Makefile.in"),
4366 Vinstallation_directory
);
4367 tem2
= Ffile_exists_p (tem
);
4368 if (!NILP (tem1
) && NILP (tem2
))
4370 tem
= Fexpand_file_name (build_string ("lisp"),
4373 if (NILP (Fmember (tem
, lpath
)))
4374 lpath
= Fcons (tem
, lpath
);
4378 tem
= Fexpand_file_name (build_string ("site-lisp"),
4380 tem1
= Ffile_accessible_directory_p (tem
);
4383 if (NILP (Fmember (tem
, lpath
)))
4384 lpath
= Fcons (tem
, lpath
);
4388 } /* Vinstallation_directory != Vsource_directory */
4390 } /* if Vinstallation_directory */
4392 else /* !initialized */
4394 /* NORMAL refers to PATH_DUMPLOADSEARCH, ie the lisp dir in the
4395 source directory. We used to add ../lisp (ie the lisp dir in
4396 the build directory) at the front here, but that should not
4397 be necessary, since in out of tree builds lisp/ is empty, save
4399 lpath
= decode_env_path (0, normal
, 0);
4401 #endif /* !CANNOT_DUMP */
4409 /* First, set Vload_path. */
4411 /* Ignore EMACSLOADPATH when dumping. */
4413 bool use_loadpath
= true;
4415 bool use_loadpath
= NILP (Vpurify_flag
);
4418 if (use_loadpath
&& egetenv ("EMACSLOADPATH"))
4420 Vload_path
= decode_env_path ("EMACSLOADPATH", 0, 1);
4422 /* Check (non-nil) user-supplied elements. */
4423 load_path_check (Vload_path
);
4425 /* If no nils in the environment variable, use as-is.
4426 Otherwise, replace any nils with the default. */
4427 if (! NILP (Fmemq (Qnil
, Vload_path
)))
4429 Lisp_Object elem
, elpath
= Vload_path
;
4430 Lisp_Object default_lpath
= load_path_default ();
4432 /* Check defaults, before adding site-lisp. */
4433 load_path_check (default_lpath
);
4435 /* Add the site-lisp directories to the front of the default. */
4436 if (!no_site_lisp
&& PATH_SITELOADSEARCH
[0] != '\0')
4438 Lisp_Object sitelisp
;
4439 sitelisp
= decode_env_path (0, PATH_SITELOADSEARCH
, 0);
4440 if (! NILP (sitelisp
))
4441 default_lpath
= nconc2 (sitelisp
, default_lpath
);
4446 /* Replace nils from EMACSLOADPATH by default. */
4447 while (CONSP (elpath
))
4449 elem
= XCAR (elpath
);
4450 elpath
= XCDR (elpath
);
4451 Vload_path
= CALLN (Fappend
, Vload_path
,
4452 NILP (elem
) ? default_lpath
: list1 (elem
));
4454 } /* Fmemq (Qnil, Vload_path) */
4458 Vload_path
= load_path_default ();
4460 /* Check before adding site-lisp directories.
4461 The install should have created them, but they are not
4462 required, so no need to warn if they are absent.
4463 Or we might be running before installation. */
4464 load_path_check (Vload_path
);
4466 /* Add the site-lisp directories at the front. */
4467 if (initialized
&& !no_site_lisp
&& PATH_SITELOADSEARCH
[0] != '\0')
4469 Lisp_Object sitelisp
;
4470 sitelisp
= decode_env_path (0, PATH_SITELOADSEARCH
, 0);
4471 if (! NILP (sitelisp
)) Vload_path
= nconc2 (sitelisp
, Vload_path
);
4477 load_in_progress
= 0;
4478 Vload_file_name
= Qnil
;
4479 Vstandard_input
= Qt
;
4480 Vloads_in_progress
= Qnil
;
4483 /* Print a warning that directory intended for use USE and with name
4484 DIRNAME cannot be accessed. On entry, errno should correspond to
4485 the access failure. Print the warning on stderr and put it in
4489 dir_warning (char const *use
, Lisp_Object dirname
)
4491 static char const format
[] = "Warning: %s '%s': %s\n";
4492 char *diagnostic
= emacs_strerror (errno
);
4493 fprintf (stderr
, format
, use
, SSDATA (ENCODE_SYSTEM (dirname
)), diagnostic
);
4495 /* Don't log the warning before we've initialized!! */
4498 ptrdiff_t diaglen
= strlen (diagnostic
);
4499 AUTO_STRING_WITH_LEN (diag
, diagnostic
, diaglen
);
4500 if (! NILP (Vlocale_coding_system
))
4503 = code_convert_string_norecord (diag
, Vlocale_coding_system
, false);
4504 diagnostic
= SSDATA (s
);
4505 diaglen
= SBYTES (s
);
4508 char *buffer
= SAFE_ALLOCA (sizeof format
- 3 * (sizeof "%s" - 1)
4509 + strlen (use
) + SBYTES (dirname
) + diaglen
);
4510 ptrdiff_t message_len
= esprintf (buffer
, format
, use
, SSDATA (dirname
),
4512 message_dolog (buffer
, message_len
, 0, STRING_MULTIBYTE (dirname
));
4518 syms_of_lread (void)
4521 defsubr (&Sread_from_string
);
4523 defsubr (&Sintern_soft
);
4524 defsubr (&Sunintern
);
4525 defsubr (&Sget_load_suffixes
);
4527 defsubr (&Seval_buffer
);
4528 defsubr (&Seval_region
);
4529 defsubr (&Sread_char
);
4530 defsubr (&Sread_char_exclusive
);
4531 defsubr (&Sread_event
);
4532 defsubr (&Sget_file_char
);
4533 defsubr (&Smapatoms
);
4534 defsubr (&Slocate_file_internal
);
4536 DEFVAR_LISP ("obarray", Vobarray
,
4537 doc
: /* Symbol table for use by `intern' and `read'.
4538 It is a vector whose length ought to be prime for best results.
4539 The vector's contents don't make sense if examined from Lisp programs;
4540 to find all the symbols in an obarray, use `mapatoms'. */);
4542 DEFVAR_LISP ("values", Vvalues
,
4543 doc
: /* List of values of all expressions which were read, evaluated and printed.
4544 Order is reverse chronological. */);
4545 XSYMBOL (intern ("values"))->declared_special
= 0;
4547 DEFVAR_LISP ("standard-input", Vstandard_input
,
4548 doc
: /* Stream for read to get input from.
4549 See documentation of `read' for possible values. */);
4550 Vstandard_input
= Qt
;
4552 DEFVAR_LISP ("read-with-symbol-positions", Vread_with_symbol_positions
,
4553 doc
: /* If non-nil, add position of read symbols to `read-symbol-positions-list'.
4555 If this variable is a buffer, then only forms read from that buffer
4556 will be added to `read-symbol-positions-list'.
4557 If this variable is t, then all read forms will be added.
4558 The effect of all other values other than nil are not currently
4559 defined, although they may be in the future.
4561 The positions are relative to the last call to `read' or
4562 `read-from-string'. It is probably a bad idea to set this variable at
4563 the toplevel; bind it instead. */);
4564 Vread_with_symbol_positions
= Qnil
;
4566 DEFVAR_LISP ("read-symbol-positions-list", Vread_symbol_positions_list
,
4567 doc
: /* A list mapping read symbols to their positions.
4568 This variable is modified during calls to `read' or
4569 `read-from-string', but only when `read-with-symbol-positions' is
4572 Each element of the list looks like (SYMBOL . CHAR-POSITION), where
4573 CHAR-POSITION is an integer giving the offset of that occurrence of the
4574 symbol from the position where `read' or `read-from-string' started.
4576 Note that a symbol will appear multiple times in this list, if it was
4577 read multiple times. The list is in the same order as the symbols
4579 Vread_symbol_positions_list
= Qnil
;
4581 DEFVAR_LISP ("read-circle", Vread_circle
,
4582 doc
: /* Non-nil means read recursive structures using #N= and #N# syntax. */);
4585 DEFVAR_LISP ("load-path", Vload_path
,
4586 doc
: /* List of directories to search for files to load.
4587 Each element is a string (directory file name) or nil (meaning
4588 `default-directory').
4589 This list is consulted by the `require' function.
4590 Initialized during startup as described in Info node `(elisp)Library Search'.
4591 Use `directory-file-name' when adding items to this path. However, Lisp
4592 programs that process this list should tolerate directories both with
4593 and without trailing slashes. */);
4595 DEFVAR_LISP ("load-suffixes", Vload_suffixes
,
4596 doc
: /* List of suffixes for Emacs Lisp files and dynamic modules.
4597 This list includes suffixes for both compiled and source Emacs Lisp files.
4598 This list should not include the empty string.
4599 `load' and related functions try to append these suffixes, in order,
4600 to the specified file name if a suffix is allowed or required. */);
4602 Vload_suffixes
= list3 (build_pure_c_string (".elc"),
4603 build_pure_c_string (".el"),
4604 build_pure_c_string (MODULES_SUFFIX
));
4606 Vload_suffixes
= list2 (build_pure_c_string (".elc"),
4607 build_pure_c_string (".el"));
4609 DEFVAR_LISP ("module-file-suffix", Vmodule_file_suffix
,
4610 doc
: /* Suffix of loadable module file, or nil of modules are not supported. */);
4612 Vmodule_file_suffix
= build_pure_c_string (MODULES_SUFFIX
);
4614 Vmodule_file_suffix
= Qnil
;
4616 DEFVAR_LISP ("load-file-rep-suffixes", Vload_file_rep_suffixes
,
4617 doc
: /* List of suffixes that indicate representations of \
4619 This list should normally start with the empty string.
4621 Enabling Auto Compression mode appends the suffixes in
4622 `jka-compr-load-suffixes' to this list and disabling Auto Compression
4623 mode removes them again. `load' and related functions use this list to
4624 determine whether they should look for compressed versions of a file
4625 and, if so, which suffixes they should try to append to the file name
4626 in order to do so. However, if you want to customize which suffixes
4627 the loading functions recognize as compression suffixes, you should
4628 customize `jka-compr-load-suffixes' rather than the present variable. */);
4629 Vload_file_rep_suffixes
= list1 (empty_unibyte_string
);
4631 DEFVAR_BOOL ("load-in-progress", load_in_progress
,
4632 doc
: /* Non-nil if inside of `load'. */);
4633 DEFSYM (Qload_in_progress
, "load-in-progress");
4635 DEFVAR_LISP ("after-load-alist", Vafter_load_alist
,
4636 doc
: /* An alist of functions to be evalled when particular files are loaded.
4637 Each element looks like (REGEXP-OR-FEATURE FUNCS...).
4639 REGEXP-OR-FEATURE is either a regular expression to match file names, or
4640 a symbol (a feature name).
4642 When `load' is run and the file-name argument matches an element's
4643 REGEXP-OR-FEATURE, or when `provide' is run and provides the symbol
4644 REGEXP-OR-FEATURE, the FUNCS in the element are called.
4646 An error in FORMS does not undo the load, but does prevent execution of
4647 the rest of the FORMS. */);
4648 Vafter_load_alist
= Qnil
;
4650 DEFVAR_LISP ("load-history", Vload_history
,
4651 doc
: /* Alist mapping loaded file names to symbols and features.
4652 Each alist element should be a list (FILE-NAME ENTRIES...), where
4653 FILE-NAME is the name of a file that has been loaded into Emacs.
4654 The file name is absolute and true (i.e. it doesn't contain symlinks).
4655 As an exception, one of the alist elements may have FILE-NAME nil,
4656 for symbols and features not associated with any file.
4658 The remaining ENTRIES in the alist element describe the functions and
4659 variables defined in that file, the features provided, and the
4660 features required. Each entry has the form `(provide . FEATURE)',
4661 `(require . FEATURE)', `(defun . FUNCTION)', `(autoload . SYMBOL)',
4662 `(defface . SYMBOL)', or `(t . SYMBOL)'. Entries like `(t . SYMBOL)'
4663 may precede a `(defun . FUNCTION)' entry, and means that SYMBOL was an
4664 autoload before this file redefined it as a function. In addition,
4665 entries may also be single symbols, which means that SYMBOL was
4666 defined by `defvar' or `defconst'.
4668 During preloading, the file name recorded is relative to the main Lisp
4669 directory. These file names are converted to absolute at startup. */);
4670 Vload_history
= Qnil
;
4672 DEFVAR_LISP ("load-file-name", Vload_file_name
,
4673 doc
: /* Full name of file being loaded by `load'. */);
4674 Vload_file_name
= Qnil
;
4676 DEFVAR_LISP ("user-init-file", Vuser_init_file
,
4677 doc
: /* File name, including directory, of user's initialization file.
4678 If the file loaded had extension `.elc', and the corresponding source file
4679 exists, this variable contains the name of source file, suitable for use
4680 by functions like `custom-save-all' which edit the init file.
4681 While Emacs loads and evaluates the init file, value is the real name
4682 of the file, regardless of whether or not it has the `.elc' extension. */);
4683 Vuser_init_file
= Qnil
;
4685 DEFVAR_LISP ("current-load-list", Vcurrent_load_list
,
4686 doc
: /* Used for internal purposes by `load'. */);
4687 Vcurrent_load_list
= Qnil
;
4689 DEFVAR_LISP ("load-read-function", Vload_read_function
,
4690 doc
: /* Function used by `load' and `eval-region' for reading expressions.
4691 Called with a single argument (the stream from which to read).
4692 The default is to use the function `read'. */);
4693 DEFSYM (Qread
, "read");
4694 Vload_read_function
= Qread
;
4696 DEFVAR_LISP ("load-source-file-function", Vload_source_file_function
,
4697 doc
: /* Function called in `load' to load an Emacs Lisp source file.
4698 The value should be a function for doing code conversion before
4699 reading a source file. It can also be nil, in which case loading is
4700 done without any code conversion.
4702 If the value is a function, it is called with four arguments,
4703 FULLNAME, FILE, NOERROR, NOMESSAGE. FULLNAME is the absolute name of
4704 the file to load, FILE is the non-absolute name (for messages etc.),
4705 and NOERROR and NOMESSAGE are the corresponding arguments passed to
4706 `load'. The function should return t if the file was loaded. */);
4707 Vload_source_file_function
= Qnil
;
4709 DEFVAR_BOOL ("load-force-doc-strings", load_force_doc_strings
,
4710 doc
: /* Non-nil means `load' should force-load all dynamic doc strings.
4711 This is useful when the file being loaded is a temporary copy. */);
4712 load_force_doc_strings
= 0;
4714 DEFVAR_BOOL ("load-convert-to-unibyte", load_convert_to_unibyte
,
4715 doc
: /* Non-nil means `read' converts strings to unibyte whenever possible.
4716 This is normally bound by `load' and `eval-buffer' to control `read',
4717 and is not meant for users to change. */);
4718 load_convert_to_unibyte
= 0;
4720 DEFVAR_LISP ("source-directory", Vsource_directory
,
4721 doc
: /* Directory in which Emacs sources were found when Emacs was built.
4722 You cannot count on them to still be there! */);
4724 = Fexpand_file_name (build_string ("../"),
4725 Fcar (decode_env_path (0, PATH_DUMPLOADSEARCH
, 0)));
4727 DEFVAR_LISP ("preloaded-file-list", Vpreloaded_file_list
,
4728 doc
: /* List of files that were preloaded (when dumping Emacs). */);
4729 Vpreloaded_file_list
= Qnil
;
4731 DEFVAR_LISP ("byte-boolean-vars", Vbyte_boolean_vars
,
4732 doc
: /* List of all DEFVAR_BOOL variables, used by the byte code optimizer. */);
4733 Vbyte_boolean_vars
= Qnil
;
4735 DEFVAR_BOOL ("load-dangerous-libraries", load_dangerous_libraries
,
4736 doc
: /* Non-nil means load dangerous compiled Lisp files.
4737 Some versions of XEmacs use different byte codes than Emacs. These
4738 incompatible byte codes can make Emacs crash when it tries to execute
4740 load_dangerous_libraries
= 0;
4742 DEFVAR_BOOL ("force-load-messages", force_load_messages
,
4743 doc
: /* Non-nil means force printing messages when loading Lisp files.
4744 This overrides the value of the NOMESSAGE argument to `load'. */);
4745 force_load_messages
= 0;
4747 DEFVAR_LISP ("bytecomp-version-regexp", Vbytecomp_version_regexp
,
4748 doc
: /* Regular expression matching safe to load compiled Lisp files.
4749 When Emacs loads a compiled Lisp file, it reads the first 512 bytes
4750 from the file, and matches them against this regular expression.
4751 When the regular expression matches, the file is considered to be safe
4752 to load. See also `load-dangerous-libraries'. */);
4753 Vbytecomp_version_regexp
4754 = build_pure_c_string ("^;;;.\\(in Emacs version\\|bytecomp version FSF\\)");
4756 DEFSYM (Qlexical_binding
, "lexical-binding");
4757 DEFVAR_LISP ("lexical-binding", Vlexical_binding
,
4758 doc
: /* Whether to use lexical binding when evaluating code.
4759 Non-nil means that the code in the current buffer should be evaluated
4760 with lexical binding.
4761 This variable is automatically set from the file variables of an
4762 interpreted Lisp file read using `load'. Unlike other file local
4763 variables, this must be set in the first line of a file. */);
4764 Vlexical_binding
= Qnil
;
4765 Fmake_variable_buffer_local (Qlexical_binding
);
4767 DEFVAR_LISP ("eval-buffer-list", Veval_buffer_list
,
4768 doc
: /* List of buffers being read from by calls to `eval-buffer' and `eval-region'. */);
4769 Veval_buffer_list
= Qnil
;
4771 DEFVAR_LISP ("old-style-backquotes", Vold_style_backquotes
,
4772 doc
: /* Set to non-nil when `read' encounters an old-style backquote. */);
4773 Vold_style_backquotes
= Qnil
;
4774 DEFSYM (Qold_style_backquotes
, "old-style-backquotes");
4776 DEFVAR_BOOL ("load-prefer-newer", load_prefer_newer
,
4777 doc
: /* Non-nil means `load' prefers the newest version of a file.
4778 This applies when a filename suffix is not explicitly specified and
4779 `load' is trying various possible suffixes (see `load-suffixes' and
4780 `load-file-rep-suffixes'). Normally, it stops at the first file
4781 that exists unless you explicitly specify one or the other. If this
4782 option is non-nil, it checks all suffixes and uses whichever file is
4784 Note that if you customize this, obviously it will not affect files
4785 that are loaded before your customizations are read! */);
4786 load_prefer_newer
= 0;
4788 /* Vsource_directory was initialized in init_lread. */
4790 DEFSYM (Qcurrent_load_list
, "current-load-list");
4791 DEFSYM (Qstandard_input
, "standard-input");
4792 DEFSYM (Qread_char
, "read-char");
4793 DEFSYM (Qget_file_char
, "get-file-char");
4795 /* Used instead of Qget_file_char while loading *.elc files compiled
4796 by Emacs 21 or older. */
4797 DEFSYM (Qget_emacs_mule_file_char
, "get-emacs-mule-file-char");
4799 DEFSYM (Qload_force_doc_strings
, "load-force-doc-strings");
4801 DEFSYM (Qbackquote
, "`");
4802 DEFSYM (Qcomma
, ",");
4803 DEFSYM (Qcomma_at
, ",@");
4804 DEFSYM (Qcomma_dot
, ",.");
4806 DEFSYM (Qinhibit_file_name_operation
, "inhibit-file-name-operation");
4807 DEFSYM (Qascii_character
, "ascii-character");
4808 DEFSYM (Qfunction
, "function");
4809 DEFSYM (Qload
, "load");
4810 DEFSYM (Qload_file_name
, "load-file-name");
4811 DEFSYM (Qeval_buffer_list
, "eval-buffer-list");
4812 DEFSYM (Qfile_truename
, "file-truename");
4813 DEFSYM (Qdir_ok
, "dir-ok");
4814 DEFSYM (Qdo_after_load_evaluation
, "do-after-load-evaluation");
4816 staticpro (&read_objects
);
4817 read_objects
= Qnil
;
4818 staticpro (&seen_list
);
4821 Vloads_in_progress
= Qnil
;
4822 staticpro (&Vloads_in_progress
);
4824 DEFSYM (Qhash_table
, "hash-table");
4825 DEFSYM (Qdata
, "data");
4826 DEFSYM (Qtest
, "test");
4827 DEFSYM (Qsize
, "size");
4828 DEFSYM (Qweakness
, "weakness");
4829 DEFSYM (Qrehash_size
, "rehash-size");
4830 DEFSYM (Qrehash_threshold
, "rehash-threshold");
4832 DEFSYM (Qchar_from_name
, "char-from-name");