[bpt/emacs.git] / src / syntax.h

/* Declarations having to do with GNU Emacs syntax tables.
   Copyright (C) 1985, 1993, 1994, 1997 Free Software Foundation, Inc.

This file is part of GNU Emacs.

GNU Emacs is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.

GNU Emacs is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with GNU Emacs; see the file COPYING.  If not, write to
the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.  */


extern Lisp_Object Qsyntax_table_p;
extern Lisp_Object Fsyntax_table_p (), Fsyntax_table (), Fset_syntax_table ();
extern void update_syntax_table ();

/* The standard syntax table is stored where it will automatically
   be used in all new buffers.  */
#define Vstandard_syntax_table buffer_defaults.syntax_table

/* A syntax table is a chartable whose elements are cons cells
   (CODE+FLAGS . MATCHING-CHAR).  MATCHING-CHAR can be nil if the char
   is not a kind of parenthesis.

   The low 8 bits of CODE+FLAGS is a code, as follows:  */

enum syntaxcode
  {
    Swhitespace, /* for a whitespace character */
    Spunct,	 /* for random punctuation characters */
    Sword,	 /* for a word constituent */
    Ssymbol,	 /* symbol constituent but not word constituent */
    Sopen,	 /* for a beginning delimiter */
    Sclose,      /* for an ending delimiter */
    Squote,	 /* for a prefix character like Lisp ' */
    Sstring,	 /* for a string-grouping character like Lisp " */
    Smath,	 /* for delimiters like $ in Tex.  */
    Sescape,	 /* for a character that begins a C-style escape */
    Scharquote,  /* for a character that quotes the following character */
    Scomment,    /* for a comment-starting character */
    Sendcomment, /* for a comment-ending character */
    Sinherit,    /* use the standard syntax table for this character */
    Scomment_fence, /* Starts/ends comment which is delimited on the
		       other side by a char with the same syntaxcode.  */
    Sstring_fence,  /* Starts/ends string which is delimited on the
		       other side by a char with the same syntaxcode.  */
    Smax	 /* Upper bound on codes that are meaningful */
  };

/* Set the syntax entry VAL for char C in table TABLE.  */

#define SET_RAW_SYNTAX_ENTRY(table, c, val)				\
  ((c) < CHAR_TABLE_SINGLE_BYTE_SLOTS					\
   ? (XCHAR_TABLE (table)->contents[(unsigned char) (c)] = (val))	\
   : Faset ((table), make_number (c), (val)))

/* Fetch the syntax entry for char C in syntax table TABLE.
   This macro is called only when C is less than CHAR_TABLE_ORDINARY_SLOTS.
   Do inheritance.  */

#ifdef __GNUC__
#define SYNTAX_ENTRY_FOLLOW_PARENT(table, c)			\
  ({ Lisp_Object tbl = table;					\
     Lisp_Object temp = XCHAR_TABLE (tbl)->contents[(c)];	\
     while (NILP (temp))					\
       {							\
	 tbl = XCHAR_TABLE (tbl)->parent;			\
	 if (NILP (tbl))					\
	   break;						\
	 temp = XCHAR_TABLE (tbl)->contents[(c)];		\
       }							\
     temp; })
#else
extern Lisp_Object syntax_temp;
extern Lisp_Object syntax_parent_lookup ();

#define SYNTAX_ENTRY_FOLLOW_PARENT(table, c)	    	\
  (syntax_temp = XCHAR_TABLE (table)->contents[(c)],	\
   (NILP (syntax_temp)				    	\
    ? syntax_parent_lookup (table, (c))		    	\
    : syntax_temp))
#endif

/* SYNTAX_ENTRY fetches the information from the entry for character C
   in syntax table TABLE, or from globally kept data (gl_state).  
   Does inheritance.  */
/* CURRENT_SYNTAX_TABLE gives the syntax table valid for current
   position, it is either the buffer's syntax table, or syntax table
   found in text properties.  */

#ifdef SYNTAX_ENTRY_VIA_PROPERTY
#  define SYNTAX_ENTRY(c)                                             \
    (gl_state.use_global ? gl_state.global_code : SYNTAX_ENTRY_INT (c))
#  define CURRENT_SYNTAX_TABLE gl_state.current_syntax_table
#else
#  define SYNTAX_ENTRY SYNTAX_ENTRY_INT
#  define CURRENT_SYNTAX_TABLE current_buffer->syntax_table
#endif

#define SYNTAX_ENTRY_INT(c)						\
  ((c) < CHAR_TABLE_SINGLE_BYTE_SLOTS				\
   ? SYNTAX_ENTRY_FOLLOW_PARENT (CURRENT_SYNTAX_TABLE,	\
				 (unsigned char) (c))		\
   : Faref (CURRENT_SYNTAX_TABLE, make_number ((c))))

/* Extract the information from the entry for character C
   in the current syntax table.  */

#ifdef __GNUC__
#define SYNTAX(c)							\
  ({ Lisp_Object temp;							\
     temp = SYNTAX_ENTRY (c);						\
     (CONSP (temp)							\
      ? (enum syntaxcode) (XINT (XCONS (temp)->car) & 0xff)		\
      : Swhitespace); })

#define SYNTAX_WITH_FLAGS(c)						\
  ({ Lisp_Object temp;							\
     temp = SYNTAX_ENTRY (c);						\
     (CONSP (temp)							\
      ? XINT (XCONS (temp)->car)					\
      : (int) Swhitespace); })

#define SYNTAX_MATCH(c)							\
  ({ Lisp_Object temp;							\
     temp = SYNTAX_ENTRY (c);						\
     (CONSP (temp)							\
      ? XINT (XCONS (temp)->cdr)					\
      : Qnil); })
#else
#define SYNTAX(c)							\
  (syntax_temp = SYNTAX_ENTRY ((c)),					\
   (CONSP (syntax_temp)							\
    ? (enum syntaxcode) (XINT (XCONS (syntax_temp)->car) & 0xff)	\
    : Swhitespace))

#define SYNTAX_WITH_FLAGS(c)						\
  (syntax_temp = SYNTAX_ENTRY ((c)),					\
   (CONSP (syntax_temp)							\
    ? XINT (XCONS (syntax_temp)->car)					\
    : (int) Swhitespace))

#define SYNTAX_MATCH(c)							\
  (syntax_temp = SYNTAX_ENTRY ((c)),					\
   (CONSP (syntax_temp)							\
    ? XINT (XCONS (syntax_temp)->cdr)					\
    : Qnil))
#endif

/* Then there are six single-bit flags that have the following meanings:
  1. This character is the first of a two-character comment-start sequence.
  2. This character is the second of a two-character comment-start sequence.
  3. This character is the first of a two-character comment-end sequence.
  4. This character is the second of a two-character comment-end sequence.
  5. This character is a prefix, for backward-prefix-chars.
  Note that any two-character sequence whose first character has flag 1
  and whose second character has flag 2 will be interpreted as a comment start.

  bit 6 is used to discriminate between two different comment styles.
  Languages such as C++ allow two orthogonal syntax start/end pairs
  and bit 6 is used to determine whether a comment-end or Scommentend
  ends style a or b.  Comment start sequences can start style a or b.
  Style a is always the default.
  */

#define SYNTAX_COMSTART_FIRST(c) ((SYNTAX_WITH_FLAGS (c) >> 16) & 1)

#define SYNTAX_COMSTART_SECOND(c) ((SYNTAX_WITH_FLAGS (c) >> 17) & 1)

#define SYNTAX_COMEND_FIRST(c) ((SYNTAX_WITH_FLAGS (c) >> 18) & 1)

#define SYNTAX_COMEND_SECOND(c) ((SYNTAX_WITH_FLAGS (c) >> 19) & 1)

#define SYNTAX_PREFIX(c) ((SYNTAX_WITH_FLAGS (c) >> 20) & 1)

/* extract the comment style bit from the syntax table entry */
#define SYNTAX_COMMENT_STYLE(c) ((SYNTAX_WITH_FLAGS (c) >> 21) & 1)

/* This array, indexed by a character, contains the syntax code which that
 character signifies (as a char).  For example,
 (enum syntaxcode) syntax_spec_code['w'] is Sword.  */

extern unsigned char syntax_spec_code[0400];

/* Indexed by syntax code, give the letter that describes it.  */

extern char syntax_code_spec[16];

/* Make syntax table state (gl_state) good for POS, assuming it is
   currently good for a position before POS.  */
#define UPDATE_SYNTAX_TABLE_FORWARD(pos)				\
		((pos) >= gl_state.e_property ?				\
		 ( update_syntax_table ((pos), 1, 0), 1 ) : 0)


/* Make syntax table state (gl_state) good for POS, assuming it is
   currently good for a position after POS.  */
#define UPDATE_SYNTAX_TABLE_BACKWARD(pos)				\
		((pos) <= gl_state.b_property ?				\
		 ( update_syntax_table ((pos), -1, 0), 1 ) : 0)

/* Make syntax table good for POS. */
#define UPDATE_SYNTAX_TABLE(pos)					\
		((pos) <= gl_state.b_property ?				\
		 ( update_syntax_table ((pos), -1, 0), 1 ) :		\
		 ( (pos) >= gl_state.e_property ?			\
		   ( update_syntax_table ((pos), 1, 0), 1 ) : 0))

/* This macro should be called with FROM at the start of forward
   search, or after the last position of the backward search.  It
   makes sure that the first char is picked up with correct table, so
   one does not need to call UPDATE_SYNTAX_TABLE immediately after the
   call. 
   Sign of COUNT gives the direction of the search.
 */

#define SETUP_SYNTAX_TABLE(from,count)					\
  gl_state.b_property = BEGV - 1;					\
  gl_state.e_property = ZV + 1;						\
  gl_state.use_global = 0;						\
  gl_state.current_syntax_table = current_buffer->syntax_table;		\
  if (parse_sexp_lookup_properties) 					\
      update_syntax_table ((count) > 0 ? (from) : (from) - 1, (count), 1, Qnil);

/* Same as above, but in OBJECT.  If OBJECT is nil, use current buffer.
   If it is t, ignore properties altogether. */

#define SETUP_SYNTAX_TABLE_FOR_OBJECT(object, from, count)		\
  if (BUFFERP (object))							\
    {									\
      gl_state.b_property = BEGV - 1;					\
      gl_state.e_property = ZV;						\
    }									\
  else if (EQ (object, Qt))						\
    {									\
      gl_state.b_property = - 1;					\
      gl_state.e_property = 1500000000;					\
    }									\
  else									\
    {									\
      gl_state.b_property = -1;						\
      gl_state.e_property = 1 + XSTRING (object)->size;			\
    }									\
  gl_state.use_global = 0;						\
  gl_state.current_syntax_table = current_buffer->syntax_table;		\
  if (parse_sexp_lookup_properties) 					\
      update_syntax_table (count > 0 ? (from) : (from) - 1, count, 1, object);

struct gl_state_s
{
  int start;				/* Where to stop. */
  int stop;				/* Where to stop. */
  int use_global;			/* Whether to use global_code
					   or c_s_t. */
  Lisp_Object global_code;		/* Syntax code of current char. */
  Lisp_Object current_syntax_table;	/* Syntax table for current pos. */
  Lisp_Object old_prop;			/* Syntax-table prop at prev pos. */
  int b_property;			/* Last index where c_s_t is 
					   not valid. */
  int e_property;			/* First index where c_s_t is
					   not valid. */
  INTERVAL forward_i;			/* Where to start lookup on forward */
  INTERVAL backward_i;			/* or backward movement.  The
					   data in c_s_t is valid
					   between these intervals,
					   and possibly at the
					   intervals too, depending
					   on: */
  char left_ok;
  char right_ok;
};

extern struct gl_state_s gl_state;
extern int parse_sexp_lookup_properties;
extern INTERVAL interval_of();
Commit	Line	Data
9889c728	1	/* Declarations having to do with GNU Emacs syntax tables.
5eea1c5a	2	Copyright (C) 1985, 1993, 1994, 1997 Free Software Foundation, Inc.
9889c728 JB	3
	4	This file is part of GNU Emacs.
	5
	6	GNU Emacs is free software; you can redistribute it and/or modify
	7	it under the terms of the GNU General Public License as published by
7c938215	8	the Free Software Foundation; either version 2, or (at your option)
9889c728 JB	9	any later version.
	10
	11	GNU Emacs is distributed in the hope that it will be useful,
	12	but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	14	GNU General Public License for more details.
	15
	16	You should have received a copy of the GNU General Public License
	17	along with GNU Emacs; see the file COPYING. If not, write to
3b7ad313 EN	18	the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
3b7ad313 EN	19	Boston, MA 02111-1307, USA. */
9889c728 JB	20
	21
	22	extern Lisp_Object Qsyntax_table_p;
	23	extern Lisp_Object Fsyntax_table_p (), Fsyntax_table (), Fset_syntax_table ();
5eea1c5a	24	extern void update_syntax_table ();
9889c728 JB	25
	26	/* The standard syntax table is stored where it will automatically
	27	be used in all new buffers. */
	28	#define Vstandard_syntax_table buffer_defaults.syntax_table
	29
e46c910e RS	30	/* A syntax table is a chartable whose elements are cons cells
	31	(CODE+FLAGS . MATCHING-CHAR). MATCHING-CHAR can be nil if the char
	32	is not a kind of parenthesis.
9889c728	33
e46c910e	34	The low 8 bits of CODE+FLAGS is a code, as follows: */
9889c728 JB	35
	36	enum syntaxcode
	37	{
	38	Swhitespace, /* for a whitespace character */
	39	Spunct, /* for random punctuation characters */
	40	Sword, /* for a word constituent */
	41	Ssymbol, /* symbol constituent but not word constituent */
	42	Sopen, /* for a beginning delimiter */
	43	Sclose, /* for an ending delimiter */
	44	Squote, /* for a prefix character like Lisp ' */
	45	Sstring, /* for a string-grouping character like Lisp " */
5eea1c5a	46	Smath, /* for delimiters like $ in Tex. */
9889c728 JB	47	Sescape, /* for a character that begins a C-style escape */
	48	Scharquote, /* for a character that quotes the following character */
	49	Scomment, /* for a comment-starting character */
	50	Sendcomment, /* for a comment-ending character */
c8cdcb16	51	Sinherit, /* use the standard syntax table for this character */
5eea1c5a RS	52	Scomment_fence, /* Starts/ends comment which is delimited on the
	53	other side by a char with the same syntaxcode. */
	54	Sstring_fence, /* Starts/ends string which is delimited on the
	55	other side by a char with the same syntaxcode. */
9889c728 JB	56	Smax /* Upper bound on codes that are meaningful */
	57	};
	58
e0b8ff93	59	/* Set the syntax entry VAL for char C in table TABLE. */
e46c910e	60
0e35bfd8	61	#define SET_RAW_SYNTAX_ENTRY(table, c, val) \
9ca6ab7d	62	((c) < CHAR_TABLE_SINGLE_BYTE_SLOTS \
0e35bfd8 KH	63	? (XCHAR_TABLE (table)->contents[(unsigned char) (c)] = (val)) \
0e35bfd8 KH	64	: Faset ((table), make_number (c), (val)))
e0b8ff93 KH	65
	66	/* Fetch the syntax entry for char C in syntax table TABLE.
	67	This macro is called only when C is less than CHAR_TABLE_ORDINARY_SLOTS.
	68	Do inheritance. */
	69
	70	#ifdef __GNUC__
	71	#define SYNTAX_ENTRY_FOLLOW_PARENT(table, c) \
	72	({ Lisp_Object tbl = table; \
	73	Lisp_Object temp = XCHAR_TABLE (tbl)->contents[(c)]; \
	74	while (NILP (temp)) \
	75	{ \
	76	tbl = XCHAR_TABLE (tbl)->parent; \
	77	if (NILP (tbl)) \
	78	break; \
	79	temp = XCHAR_TABLE (tbl)->contents[(c)]; \
	80	} \
	81	temp; })
c8cdcb16	82	#else
e0b8ff93 KH	83	extern Lisp_Object syntax_temp;
e0b8ff93 KH	84	extern Lisp_Object syntax_parent_lookup ();
e46c910e	85
e0b8ff93 KH	86	#define SYNTAX_ENTRY_FOLLOW_PARENT(table, c) \
	87	(syntax_temp = XCHAR_TABLE (table)->contents[(c)], \
	88	(NILP (syntax_temp) \
	89	? syntax_parent_lookup (table, (c)) \
	90	: syntax_temp))
c8cdcb16	91	#endif
9889c728	92
5eea1c5a RS	93	/* SYNTAX_ENTRY fetches the information from the entry for character C
	94	in syntax table TABLE, or from globally kept data (gl_state).
	95	Does inheritance. */
	96	/* CURRENT_SYNTAX_TABLE gives the syntax table valid for current
	97	position, it is either the buffer's syntax table, or syntax table
	98	found in text properties. */
	99
	100	#ifdef SYNTAX_ENTRY_VIA_PROPERTY
	101	# define SYNTAX_ENTRY(c) \
	102	(gl_state.use_global ? gl_state.global_code : SYNTAX_ENTRY_INT (c))
	103	# define CURRENT_SYNTAX_TABLE gl_state.current_syntax_table
	104	#else
	105	# define SYNTAX_ENTRY SYNTAX_ENTRY_INT
	106	# define CURRENT_SYNTAX_TABLE current_buffer->syntax_table
	107	#endif
e0b8ff93	108
5eea1c5a	109	#define SYNTAX_ENTRY_INT(c) \
9ca6ab7d	110	((c) < CHAR_TABLE_SINGLE_BYTE_SLOTS \
5eea1c5a	111	? SYNTAX_ENTRY_FOLLOW_PARENT (CURRENT_SYNTAX_TABLE, \
0e35bfd8	112	(unsigned char) (c)) \
5eea1c5a	113	: Faref (CURRENT_SYNTAX_TABLE, make_number ((c))))
e0b8ff93	114
e46c910e	115	/* Extract the information from the entry for character C
e0b8ff93	116	in the current syntax table. */
c8cdcb16 RS	117
c8cdcb16 RS	118	#ifdef __GNUC__
e46c910e RS	119	#define SYNTAX(c) \
	120	({ Lisp_Object temp; \
	121	temp = SYNTAX_ENTRY (c); \
	122	(CONSP (temp) \
	123	? (enum syntaxcode) (XINT (XCONS (temp)->car) & 0xff) \
e0b8ff93	124	: Swhitespace); })
e46c910e RS	125
	126	#define SYNTAX_WITH_FLAGS(c) \
	127	({ Lisp_Object temp; \
	128	temp = SYNTAX_ENTRY (c); \
	129	(CONSP (temp) \
	130	? XINT (XCONS (temp)->car) \
e0b8ff93	131	: (int) Swhitespace); })
e46c910e RS	132
	133	#define SYNTAX_MATCH(c) \
	134	({ Lisp_Object temp; \
	135	temp = SYNTAX_ENTRY (c); \
	136	(CONSP (temp) \
	137	? XINT (XCONS (temp)->cdr) \
e0b8ff93	138	: Qnil); })
c8cdcb16	139	#else
e46c910e	140	#define SYNTAX(c) \
9d40ebd2	141	(syntax_temp = SYNTAX_ENTRY ((c)), \
e46c910e RS	142	(CONSP (syntax_temp) \
e46c910e RS	143	? (enum syntaxcode) (XINT (XCONS (syntax_temp)->car) & 0xff) \
e0b8ff93	144	: Swhitespace))
e46c910e RS	145
e46c910e RS	146	#define SYNTAX_WITH_FLAGS(c) \
9d40ebd2	147	(syntax_temp = SYNTAX_ENTRY ((c)), \
e46c910e RS	148	(CONSP (syntax_temp) \
e46c910e RS	149	? XINT (XCONS (syntax_temp)->car) \
e0b8ff93	150	: (int) Swhitespace))
e46c910e RS	151
e46c910e RS	152	#define SYNTAX_MATCH(c) \
9d40ebd2	153	(syntax_temp = SYNTAX_ENTRY ((c)), \
e46c910e RS	154	(CONSP (syntax_temp) \
e46c910e RS	155	? XINT (XCONS (syntax_temp)->cdr) \
e0b8ff93	156	: Qnil))
c8cdcb16	157	#endif
9889c728	158
a306d6f1	159	/* Then there are six single-bit flags that have the following meanings:
9889c728 JB	160	1. This character is the first of a two-character comment-start sequence.
	161	2. This character is the second of a two-character comment-start sequence.
	162	3. This character is the first of a two-character comment-end sequence.
	163	4. This character is the second of a two-character comment-end sequence.
	164	5. This character is a prefix, for backward-prefix-chars.
a306d6f1 RS	165	Note that any two-character sequence whose first character has flag 1
	166	and whose second character has flag 2 will be interpreted as a comment start.
	167
	168	bit 6 is used to discriminate between two different comment styles.
	169	Languages such as C++ allow two orthogonal syntax start/end pairs
	170	and bit 6 is used to determine whether a comment-end or Scommentend
5eea1c5a	171	ends style a or b. Comment start sequences can start style a or b.
a306d6f1 RS	172	Style a is always the default.
a306d6f1 RS	173	*/
9889c728	174
e46c910e	175	#define SYNTAX_COMSTART_FIRST(c) ((SYNTAX_WITH_FLAGS (c) >> 16) & 1)
c8cdcb16	176
e46c910e	177	#define SYNTAX_COMSTART_SECOND(c) ((SYNTAX_WITH_FLAGS (c) >> 17) & 1)
c8cdcb16	178
e46c910e	179	#define SYNTAX_COMEND_FIRST(c) ((SYNTAX_WITH_FLAGS (c) >> 18) & 1)
c8cdcb16	180
e46c910e	181	#define SYNTAX_COMEND_SECOND(c) ((SYNTAX_WITH_FLAGS (c) >> 19) & 1)
c8cdcb16	182
e46c910e	183	#define SYNTAX_PREFIX(c) ((SYNTAX_WITH_FLAGS (c) >> 20) & 1)
9889c728	184
a306d6f1	185	/* extract the comment style bit from the syntax table entry */
e46c910e	186	#define SYNTAX_COMMENT_STYLE(c) ((SYNTAX_WITH_FLAGS (c) >> 21) & 1)
a306d6f1	187
9889c728 JB	188	/* This array, indexed by a character, contains the syntax code which that
9889c728 JB	189	character signifies (as a char). For example,
5eea1c5a	190	(enum syntaxcode) syntax_spec_code['w'] is Sword. */
9889c728 JB	191
	192	extern unsigned char syntax_spec_code[0400];
	193
5eea1c5a RS	194	/* Indexed by syntax code, give the letter that describes it. */
	195
	196	extern char syntax_code_spec[16];
	197
	198	/* Make syntax table state (gl_state) good for POS, assuming it is
	199	currently good for a position before POS. */
	200	#define UPDATE_SYNTAX_TABLE_FORWARD(pos) \
	201	((pos) >= gl_state.e_property ? \
	202	( update_syntax_table ((pos), 1, 0), 1 ) : 0)
	203
	204
	205	/* Make syntax table state (gl_state) good for POS, assuming it is
	206	currently good for a position after POS. */
	207	#define UPDATE_SYNTAX_TABLE_BACKWARD(pos) \
	208	((pos) <= gl_state.b_property ? \
	209	( update_syntax_table ((pos), -1, 0), 1 ) : 0)
	210
	211	/* Make syntax table good for POS. */
	212	#define UPDATE_SYNTAX_TABLE(pos) \
	213	((pos) <= gl_state.b_property ? \
	214	( update_syntax_table ((pos), -1, 0), 1 ) : \
	215	( (pos) >= gl_state.e_property ? \
	216	( update_syntax_table ((pos), 1, 0), 1 ) : 0))
	217
	218	/* This macro should be called with FROM at the start of forward
	219	search, or after the last position of the backward search. It
	220	makes sure that the first char is picked up with correct table, so
	221	one does not need to call UPDATE_SYNTAX_TABLE immediately after the
	222	call.
	223	Sign of COUNT gives the direction of the search.
	224	*/
	225
	226	#define SETUP_SYNTAX_TABLE(from,count) \
	227	gl_state.b_property = BEGV - 1; \
	228	gl_state.e_property = ZV + 1; \
	229	gl_state.use_global = 0; \
	230	gl_state.current_syntax_table = current_buffer->syntax_table; \
	231	if (parse_sexp_lookup_properties) \
	232	update_syntax_table ((count) > 0 ? (from) : (from) - 1, (count), 1, Qnil);
	233
	234	/* Same as above, but in OBJECT. If OBJECT is nil, use current buffer.
	235	If it is t, ignore properties altogether. */
	236
	237	#define SETUP_SYNTAX_TABLE_FOR_OBJECT(object, from, count) \
	238	if (BUFFERP (object)) \
	239	{ \
	240	gl_state.b_property = BEGV - 1; \
	241	gl_state.e_property = ZV; \
	242	} \
	243	else if (EQ (object, Qt)) \
	244	{ \
	245	gl_state.b_property = - 1; \
	246	gl_state.e_property = 1500000000; \
	247	} \
	248	else \
	249	{ \
	250	gl_state.b_property = -1; \
	251	gl_state.e_property = 1 + XSTRING (object)->size; \
	252	} \
	253	gl_state.use_global = 0; \
	254	gl_state.current_syntax_table = current_buffer->syntax_table; \
	255	if (parse_sexp_lookup_properties) \
	256	update_syntax_table (count > 0 ? (from) : (from) - 1, count, 1, object);
	257
258	struct gl_state_s
259	{
260	int start; /* Where to stop. */
261	int stop; /* Where to stop. */
262	int use_global; /* Whether to use global_code
263	or c_s_t. */
264	Lisp_Object global_code; /* Syntax code of current char. */
265	Lisp_Object current_syntax_table; /* Syntax table for current pos. */
266	Lisp_Object old_prop; /* Syntax-table prop at prev pos. */
267	int b_property; /* Last index where c_s_t is
268	not valid. */
269	int e_property; /* First index where c_s_t is
270	not valid. */
271	INTERVAL forward_i; /* Where to start lookup on forward */
272	INTERVAL backward_i; /* or backward movement. The
273	data in c_s_t is valid
274	between these intervals,
275	and possibly at the
276	intervals too, depending
277	on: */
278	char left_ok;
279	char right_ok;
280	};
281
282	extern struct gl_state_s gl_state;
283	extern int parse_sexp_lookup_properties;
284	extern INTERVAL interval_of();