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

/* Declarations having to do with GNU Emacs syntax tables.

Copyright (C) 1985, 1993-1994, 1997-1998, 2001-2011
  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 3 of the License, 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.  If not, see <http://www.gnu.org/licenses/>.  */


extern Lisp_Object Qsyntax_table_p;
extern void update_syntax_table (EMACS_INT, int, int, Lisp_Object);

/* The standard syntax table is stored where it will automatically
   be used in all new buffers.  */
#define Vstandard_syntax_table BVAR (&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 any char with the same syntaxcode.  */
    Sstring_fence,  /* Starts/ends string which is delimited on the
		       other side by any 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)	\
  CHAR_TABLE_SET ((table), c, (val))

/* Set the syntax entry VAL for char-range RANGE in table TABLE.
   RANGE is a cons (FROM . TO) specifying the range of characters.  */

#define SET_RAW_SYNTAX_ENTRY_RANGE(table, range, val)	\
  Fset_char_table_range ((table), (range), (val))

/* 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 BVAR (current_buffer, syntax_table)
#endif

#define SYNTAX_ENTRY_INT(c) CHAR_TABLE_REF (CURRENT_SYNTAX_TABLE, (c))

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

#ifdef __GNUC__
#define SYNTAX(c)							\
  ({ Lisp_Object _syntax_temp;						\
     _syntax_temp = SYNTAX_ENTRY (c);					\
     (CONSP (_syntax_temp)						\
      ? (enum syntaxcode) (XINT (XCAR (_syntax_temp)) & 0xff)		\
      : Swhitespace); })

#define SYNTAX_WITH_FLAGS(c)						\
  ({ Lisp_Object _syntax_temp;						\
     _syntax_temp = SYNTAX_ENTRY (c);					\
     (CONSP (_syntax_temp)						\
      ? XINT (XCAR (_syntax_temp))					\
      : (int) Swhitespace); })

#define SYNTAX_MATCH(c)							\
  ({ Lisp_Object _syntax_temp;						\
     _syntax_temp = SYNTAX_ENTRY (c);					\
     (CONSP (_syntax_temp)						\
      ? XCDR (_syntax_temp)						\
      : Qnil); })
#else
extern Lisp_Object syntax_temp;
#define SYNTAX(c)							\
  (syntax_temp = SYNTAX_ENTRY ((c)),					\
   (CONSP (syntax_temp)							\
    ? (enum syntaxcode) (XINT (XCAR (syntax_temp)) & 0xff)	\
    : Swhitespace))

#define SYNTAX_WITH_FLAGS(c)						\
  (syntax_temp = SYNTAX_ENTRY ((c)),					\
   (CONSP (syntax_temp)							\
    ? XINT (XCAR (syntax_temp))					\
    : (int) Swhitespace))

#define SYNTAX_MATCH(c)							\
  (syntax_temp = SYNTAX_ENTRY ((c)),					\
   (CONSP (syntax_temp)							\
    ? XCDR (syntax_temp)						\
    : Qnil))
#endif


/* Whether the syntax of the character C has the prefix flag set.  */
extern int syntax_prefix_flag_p (int c);

/* 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];

/* Convert the byte offset BYTEPOS into a character position,
   for the object recorded in gl_state with SETUP_SYNTAX_TABLE_FOR_OBJECT.

   The value is meant for use in the UPDATE_SYNTAX_TABLE... macros.
   These macros do nothing when parse_sexp_lookup_properties is 0,
   so we return 0 in that case, for speed.  */

#define SYNTAX_TABLE_BYTE_TO_CHAR(bytepos)				\
  (! parse_sexp_lookup_properties					\
   ? 0									\
   : STRINGP (gl_state.object)						\
   ? string_byte_to_char (gl_state.object, (bytepos))			\
   : BUFFERP (gl_state.object)						\
   ? buf_bytepos_to_charpos (XBUFFER (gl_state.object),			\
			     (bytepos) + BUF_BEGV_BYTE (XBUFFER (gl_state.object)) - 1) - BUF_BEGV (XBUFFER (gl_state.object)) + 1	\
   : NILP (gl_state.object)						\
   ? BYTE_TO_CHAR ((bytepos) + BEGV_BYTE - 1) - BEGV + 1		\
   : (bytepos))

/* Make syntax table state (gl_state) good for CHARPOS, assuming it is
   currently good for a position before CHARPOS.  */

#define UPDATE_SYNTAX_TABLE_FORWARD(charpos)			\
  (parse_sexp_lookup_properties					\
   && (charpos) >= gl_state.e_property				\
   ? (update_syntax_table ((charpos) + gl_state.offset, 1, 0,	\
			   gl_state.object),			\
      1)							\
   : 0)

/* Make syntax table state (gl_state) good for CHARPOS, assuming it is
   currently good for a position after CHARPOS.  */

#define UPDATE_SYNTAX_TABLE_BACKWARD(charpos)			\
  (parse_sexp_lookup_properties					\
   && (charpos) < gl_state.b_property				\
   ? (update_syntax_table ((charpos) + gl_state.offset, -1, 0,	\
			   gl_state.object),			\
      1)							\
   : 0)

/* Make syntax table good for CHARPOS.  */

#define UPDATE_SYNTAX_TABLE(charpos)				\
  (parse_sexp_lookup_properties					\
   && (charpos) < gl_state.b_property				\
   ? (update_syntax_table ((charpos) + gl_state.offset, -1, 0,	\
			   gl_state.object),			\
      1)							\
   : (parse_sexp_lookup_properties				\
      && (charpos) >= gl_state.e_property			\
      ? (update_syntax_table ((charpos) + gl_state.offset, 1, 0,\
			      gl_state.object),			\
	 1)							\
      : 0))

/* This macro sets up the buffer-global syntax table.  */
#define SETUP_BUFFER_SYNTAX_TABLE()					\
do									\
  {									\
    gl_state.use_global = 0;						\
    gl_state.current_syntax_table = BVAR (current_buffer, syntax_table);	\
  } while (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)					\
do									\
  {									\
    SETUP_BUFFER_SYNTAX_TABLE ();					\
    gl_state.b_property = BEGV;						\
    gl_state.e_property = ZV + 1;					\
    gl_state.object = Qnil;						\
    gl_state.offset = 0;						\
    if (parse_sexp_lookup_properties)					\
      if ((COUNT) > 0 || (FROM) > BEGV)					\
        update_syntax_table ((COUNT) > 0 ? (FROM) : (FROM) - 1, (COUNT),\
			     1, Qnil);					\
  }									\
while (0)

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

   This is meant for regex.c to use.  For buffers, regex.c passes arguments
   to the UPDATE_SYNTAX_TABLE macros which are relative to BEGV.
   So if it is a buffer, we set the offset field to BEGV.  */

#define SETUP_SYNTAX_TABLE_FOR_OBJECT(OBJECT, FROM, COUNT)		\
do									\
  {									\
    SETUP_BUFFER_SYNTAX_TABLE ();					\
    gl_state.object = (OBJECT);						\
    if (BUFFERP (gl_state.object))					\
      {									\
	struct buffer *buf = XBUFFER (gl_state.object);			\
	gl_state.b_property = 1;					\
	gl_state.e_property = BUF_ZV (buf) - BUF_BEGV (buf) + 1;	\
	gl_state.offset = BUF_BEGV (buf) - 1;				\
      }									\
    else if (NILP (gl_state.object))					\
      {									\
	gl_state.b_property = 1;					\
	gl_state.e_property = ZV - BEGV + 1;				\
	gl_state.offset = BEGV - 1;					\
      }									\
    else if (EQ (gl_state.object, Qt))					\
      {									\
	gl_state.b_property = 0;					\
	gl_state.e_property = 1500000000;				\
	gl_state.offset = 0;						\
      }									\
    else								\
      {									\
	gl_state.b_property = 0;					\
	gl_state.e_property = 1 + SCHARS (gl_state.object);		\
	gl_state.offset = 0;						\
      }									\
    if (parse_sexp_lookup_properties)					\
      update_syntax_table (((FROM) + gl_state.offset			\
			    + (COUNT > 0 ? 0 :  -1)),			\
			   COUNT, 1, gl_state.object);			\
  }									\
while (0)

struct gl_state_s
{
  Lisp_Object object;			/* The object we are scanning. */
  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;			/* First index where c_s_t is 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: */
  /* Offset for positions specified to UPDATE_SYNTAX_TABLE.  */
  int offset;
};

extern struct gl_state_s gl_state;
extern EMACS_INT scan_words (EMACS_INT, EMACS_INT);
Commit	Line	Data
9889c728	1	/* Declarations having to do with GNU Emacs syntax tables.
95df8112 GM	2
	3	Copyright (C) 1985, 1993-1994, 1997-1998, 2001-2011
	4	Free Software Foundation, Inc.
9889c728 JB	5
	6	This file is part of GNU Emacs.
	7
b9b1cc14	8	GNU Emacs is free software: you can redistribute it and/or modify
9889c728	9	it under the terms of the GNU General Public License as published by
b9b1cc14 GM	10	the Free Software Foundation, either version 3 of the License, or
b9b1cc14 GM	11	(at your option) any later version.
9889c728 JB	12
	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.
	17
	18	You should have received a copy of the GNU General Public License
b9b1cc14	19	along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */
9889c728 JB	20
	21
	22	extern Lisp_Object Qsyntax_table_p;
4f3a2f8d	23	extern void update_syntax_table (EMACS_INT, int, int, Lisp_Object);
9889c728 JB	24
	25	/* The standard syntax table is stored where it will automatically
	26	be used in all new buffers. */
4b4deea2	27	#define Vstandard_syntax_table BVAR (&buffer_defaults, syntax_table)
9889c728	28
e46c910e RS	29	/* A syntax table is a chartable whose elements are cons cells
	30	(CODE+FLAGS . MATCHING-CHAR). MATCHING-CHAR can be nil if the char
	31	is not a kind of parenthesis.
9889c728	32
e46c910e	33	The low 8 bits of CODE+FLAGS is a code, as follows: */
9889c728 JB	34
	35	enum syntaxcode
	36	{
	37	Swhitespace, /* for a whitespace character */
	38	Spunct, /* for random punctuation characters */
	39	Sword, /* for a word constituent */
	40	Ssymbol, /* symbol constituent but not word constituent */
	41	Sopen, /* for a beginning delimiter */
	42	Sclose, /* for an ending delimiter */
	43	Squote, /* for a prefix character like Lisp ' */
	44	Sstring, /* for a string-grouping character like Lisp " */
5eea1c5a	45	Smath, /* for delimiters like $ in Tex. */
9889c728 JB	46	Sescape, /* for a character that begins a C-style escape */
	47	Scharquote, /* for a character that quotes the following character */
	48	Scomment, /* for a comment-starting character */
	49	Sendcomment, /* for a comment-ending character */
c8cdcb16	50	Sinherit, /* use the standard syntax table for this character */
5eea1c5a	51	Scomment_fence, /* Starts/ends comment which is delimited on the
47ab3db5	52	other side by any char with the same syntaxcode. */
5eea1c5a	53	Sstring_fence, /* Starts/ends string which is delimited on the
47ab3db5	54	other side by any char with the same syntaxcode. */
9889c728 JB	55	Smax /* Upper bound on codes that are meaningful */
	56	};
	57
e0b8ff93	58	/* Set the syntax entry VAL for char C in table TABLE. */
e46c910e	59
f4926ee8	60	#define SET_RAW_SYNTAX_ENTRY(table, c, val) \
dcb82a5e	61	CHAR_TABLE_SET ((table), c, (val))
e0b8ff93	62
f4926ee8 KH	63	/* Set the syntax entry VAL for char-range RANGE in table TABLE.
f4926ee8 KH	64	RANGE is a cons (FROM . TO) specifying the range of characters. */
e0b8ff93	65
f4926ee8 KH	66	#define SET_RAW_SYNTAX_ENTRY_RANGE(table, range, val) \
f4926ee8 KH	67	Fset_char_table_range ((table), (range), (val))
9889c728	68
5eea1c5a	69	/* SYNTAX_ENTRY fetches the information from the entry for character C
177c0ea7	70	in syntax table TABLE, or from globally kept data (gl_state).
5eea1c5a RS	71	Does inheritance. */
	72	/* CURRENT_SYNTAX_TABLE gives the syntax table valid for current
	73	position, it is either the buffer's syntax table, or syntax table
	74	found in text properties. */
	75
	76	#ifdef SYNTAX_ENTRY_VIA_PROPERTY
	77	# define SYNTAX_ENTRY(c) \
	78	(gl_state.use_global ? gl_state.global_code : SYNTAX_ENTRY_INT (c))
	79	# define CURRENT_SYNTAX_TABLE gl_state.current_syntax_table
	80	#else
	81	# define SYNTAX_ENTRY SYNTAX_ENTRY_INT
4b4deea2	82	# define CURRENT_SYNTAX_TABLE BVAR (current_buffer, syntax_table)
5eea1c5a	83	#endif
e0b8ff93	84
501d7ac6	85	#define SYNTAX_ENTRY_INT(c) CHAR_TABLE_REF (CURRENT_SYNTAX_TABLE, (c))
e0b8ff93	86
e46c910e	87	/* Extract the information from the entry for character C
e0b8ff93	88	in the current syntax table. */
c8cdcb16 RS	89
c8cdcb16 RS	90	#ifdef __GNUC__
e46c910e	91	#define SYNTAX(c) \
874757e8 AS	92	({ Lisp_Object _syntax_temp; \
	93	_syntax_temp = SYNTAX_ENTRY (c); \
	94	(CONSP (_syntax_temp) \
	95	? (enum syntaxcode) (XINT (XCAR (_syntax_temp)) & 0xff) \
e0b8ff93	96	: Swhitespace); })
e46c910e RS	97
e46c910e RS	98	#define SYNTAX_WITH_FLAGS(c) \
874757e8 AS	99	({ Lisp_Object _syntax_temp; \
	100	_syntax_temp = SYNTAX_ENTRY (c); \
	101	(CONSP (_syntax_temp) \
	102	? XINT (XCAR (_syntax_temp)) \
e0b8ff93	103	: (int) Swhitespace); })
e46c910e RS	104
e46c910e RS	105	#define SYNTAX_MATCH(c) \
874757e8 AS	106	({ Lisp_Object _syntax_temp; \
	107	_syntax_temp = SYNTAX_ENTRY (c); \
	108	(CONSP (_syntax_temp) \
	109	? XCDR (_syntax_temp) \
e0b8ff93	110	: Qnil); })
c8cdcb16	111	#else
3d7db6f1	112	extern Lisp_Object syntax_temp;
e46c910e	113	#define SYNTAX(c) \
9d40ebd2	114	(syntax_temp = SYNTAX_ENTRY ((c)), \
e46c910e	115	(CONSP (syntax_temp) \
3331fb06	116	? (enum syntaxcode) (XINT (XCAR (syntax_temp)) & 0xff) \
e0b8ff93	117	: Swhitespace))
e46c910e RS	118
e46c910e RS	119	#define SYNTAX_WITH_FLAGS(c) \
9d40ebd2	120	(syntax_temp = SYNTAX_ENTRY ((c)), \
e46c910e	121	(CONSP (syntax_temp) \
3331fb06	122	? XINT (XCAR (syntax_temp)) \
e0b8ff93	123	: (int) Swhitespace))
e46c910e RS	124
e46c910e RS	125	#define SYNTAX_MATCH(c) \
9d40ebd2	126	(syntax_temp = SYNTAX_ENTRY ((c)), \
e46c910e	127	(CONSP (syntax_temp) \
3331fb06	128	? XCDR (syntax_temp) \
e0b8ff93	129	: Qnil))
c8cdcb16	130	#endif
9889c728	131
a306d6f1	132
c5683ceb SM	133	/* Whether the syntax of the character C has the prefix flag set. */
c5683ceb SM	134	extern int syntax_prefix_flag_p (int c);
c0364919	135
9889c728 JB	136	/* This array, indexed by a character, contains the syntax code which that
9889c728 JB	137	character signifies (as a char). For example,
5eea1c5a	138	(enum syntaxcode) syntax_spec_code['w'] is Sword. */
9889c728 JB	139
	140	extern unsigned char syntax_spec_code[0400];
	141
5eea1c5a RS	142	/* Indexed by syntax code, give the letter that describes it. */
	143
	144	extern char syntax_code_spec[16];
	145
c292db29	146	/* Convert the byte offset BYTEPOS into a character position,
2f16e7fd RS	147	for the object recorded in gl_state with SETUP_SYNTAX_TABLE_FOR_OBJECT.
	148
	149	The value is meant for use in the UPDATE_SYNTAX_TABLE... macros.
	150	These macros do nothing when parse_sexp_lookup_properties is 0,
	151	so we return 0 in that case, for speed. */
c292db29 RS	152
c292db29 RS	153	#define SYNTAX_TABLE_BYTE_TO_CHAR(bytepos) \
2f16e7fd RS	154	(! parse_sexp_lookup_properties \
	155	? 0 \
	156	: STRINGP (gl_state.object) \
c292db29 RS	157	? string_byte_to_char (gl_state.object, (bytepos)) \
c292db29 RS	158	: BUFFERP (gl_state.object) \
f79b4b7e KH	159	? buf_bytepos_to_charpos (XBUFFER (gl_state.object), \
f79b4b7e KH	160	(bytepos) + BUF_BEGV_BYTE (XBUFFER (gl_state.object)) - 1) - BUF_BEGV (XBUFFER (gl_state.object)) + 1 \
c292db29	161	: NILP (gl_state.object) \
f79b4b7e	162	? BYTE_TO_CHAR ((bytepos) + BEGV_BYTE - 1) - BEGV + 1 \
c292db29 RS	163	: (bytepos))
c292db29 RS	164
f79b4b7e KH	165	/* Make syntax table state (gl_state) good for CHARPOS, assuming it is
f79b4b7e KH	166	currently good for a position before CHARPOS. */
5eea1c5a	167
f79b4b7e	168	#define UPDATE_SYNTAX_TABLE_FORWARD(charpos) \
2f16e7fd	169	(parse_sexp_lookup_properties \
f79b4b7e KH	170	&& (charpos) >= gl_state.e_property \
f79b4b7e KH	171	? (update_syntax_table ((charpos) + gl_state.offset, 1, 0, \
c292db29 RS	172	gl_state.object), \
	173	1) \
	174	: 0)
5eea1c5a	175
f79b4b7e KH	176	/* Make syntax table state (gl_state) good for CHARPOS, assuming it is
f79b4b7e KH	177	currently good for a position after CHARPOS. */
5eea1c5a	178
f79b4b7e	179	#define UPDATE_SYNTAX_TABLE_BACKWARD(charpos) \
2f16e7fd	180	(parse_sexp_lookup_properties \
4948e1f2	181	&& (charpos) < gl_state.b_property \
f79b4b7e	182	? (update_syntax_table ((charpos) + gl_state.offset, -1, 0, \
c292db29 RS	183	gl_state.object), \
	184	1) \
	185	: 0)
e2d8d746	186
f79b4b7e	187	/* Make syntax table good for CHARPOS. */
e2d8d746	188
f79b4b7e	189	#define UPDATE_SYNTAX_TABLE(charpos) \
2f16e7fd	190	(parse_sexp_lookup_properties \
4948e1f2	191	&& (charpos) < gl_state.b_property \
f79b4b7e	192	? (update_syntax_table ((charpos) + gl_state.offset, -1, 0, \
c292db29 RS	193	gl_state.object), \
c292db29 RS	194	1) \
2f16e7fd	195	: (parse_sexp_lookup_properties \
f79b4b7e KH	196	&& (charpos) >= gl_state.e_property \
f79b4b7e KH	197	? (update_syntax_table ((charpos) + gl_state.offset, 1, 0,\
c292db29 RS	198	gl_state.object), \
	199	1) \
	200	: 0))
5eea1c5a	201
d48cd3f4 SM	202	/* This macro sets up the buffer-global syntax table. */
	203	#define SETUP_BUFFER_SYNTAX_TABLE() \
	204	do \
	205	{ \
	206	gl_state.use_global = 0; \
4b4deea2	207	gl_state.current_syntax_table = BVAR (current_buffer, syntax_table); \
d48cd3f4 SM	208	} while (0)
d48cd3f4 SM	209
5eea1c5a RS	210	/* This macro should be called with FROM at the start of forward
	211	search, or after the last position of the backward search. It
	212	makes sure that the first char is picked up with correct table, so
	213	one does not need to call UPDATE_SYNTAX_TABLE immediately after the
177c0ea7	214	call.
5eea1c5a RS	215	Sign of COUNT gives the direction of the search.
	216	*/
	217
c292db29	218	#define SETUP_SYNTAX_TABLE(FROM, COUNT) \
92413ef3	219	do \
2f16e7fd	220	{ \
d48cd3f4	221	SETUP_BUFFER_SYNTAX_TABLE (); \
4948e1f2	222	gl_state.b_property = BEGV; \
2f16e7fd RS	223	gl_state.e_property = ZV + 1; \
2f16e7fd RS	224	gl_state.object = Qnil; \
2f16e7fd	225	gl_state.offset = 0; \
2f16e7fd	226	if (parse_sexp_lookup_properties) \
9b9794f0 RS	227	if ((COUNT) > 0 \|\| (FROM) > BEGV) \
	228	update_syntax_table ((COUNT) > 0 ? (FROM) : (FROM) - 1, (COUNT),\
	229	1, Qnil); \
2f16e7fd	230	} \
92413ef3	231	while (0)
5eea1c5a RS	232
5eea1c5a RS	233	/* Same as above, but in OBJECT. If OBJECT is nil, use current buffer.
e2d8d746 RS	234	If it is t, ignore properties altogether.
	235
	236	This is meant for regex.c to use. For buffers, regex.c passes arguments
	237	to the UPDATE_SYNTAX_TABLE macros which are relative to BEGV.
4bbd5bc3	238	So if it is a buffer, we set the offset field to BEGV. */
5eea1c5a	239
c292db29	240	#define SETUP_SYNTAX_TABLE_FOR_OBJECT(OBJECT, FROM, COUNT) \
92413ef3	241	do \
4bbd5bc3	242	{ \
d48cd3f4	243	SETUP_BUFFER_SYNTAX_TABLE (); \
c292db29 RS	244	gl_state.object = (OBJECT); \
	245	if (BUFFERP (gl_state.object)) \
	246	{ \
	247	struct buffer *buf = XBUFFER (gl_state.object); \
4948e1f2	248	gl_state.b_property = 1; \
1d1293dd	249	gl_state.e_property = BUF_ZV (buf) - BUF_BEGV (buf) + 1; \
c292db29 RS	250	gl_state.offset = BUF_BEGV (buf) - 1; \
	251	} \
	252	else if (NILP (gl_state.object)) \
4bbd5bc3	253	{ \
4948e1f2	254	gl_state.b_property = 1; \
1d1293dd	255	gl_state.e_property = ZV - BEGV + 1; \
4bbd5bc3 RS	256	gl_state.offset = BEGV - 1; \
4bbd5bc3 RS	257	} \
c292db29	258	else if (EQ (gl_state.object, Qt)) \
4bbd5bc3	259	{ \
4948e1f2	260	gl_state.b_property = 0; \
4bbd5bc3 RS	261	gl_state.e_property = 1500000000; \
	262	gl_state.offset = 0; \
	263	} \
	264	else \
	265	{ \
4948e1f2	266	gl_state.b_property = 0; \
d5db4077	267	gl_state.e_property = 1 + SCHARS (gl_state.object); \
4bbd5bc3 RS	268	gl_state.offset = 0; \
4bbd5bc3 RS	269	} \
4bbd5bc3	270	if (parse_sexp_lookup_properties) \
f79b4b7e	271	update_syntax_table (((FROM) + gl_state.offset \
c292db29 RS	272	+ (COUNT > 0 ? 0 : -1)), \
c292db29 RS	273	COUNT, 1, gl_state.object); \
4bbd5bc3	274	} \
92413ef3	275	while (0)
5eea1c5a RS	276
	277	struct gl_state_s
	278	{
c292db29	279	Lisp_Object object; /* The object we are scanning. */
5eea1c5a RS	280	int start; /* Where to stop. */
	281	int stop; /* Where to stop. */
	282	int use_global; /* Whether to use global_code
	283	or c_s_t. */
	284	Lisp_Object global_code; /* Syntax code of current char. */
	285	Lisp_Object current_syntax_table; /* Syntax table for current pos. */
	286	Lisp_Object old_prop; /* Syntax-table prop at prev pos. */
4948e1f2	287	int b_property; /* First index where c_s_t is valid. */
5eea1c5a RS	288	int e_property; /* First index where c_s_t is
	289	not valid. */
	290	INTERVAL forward_i; /* Where to start lookup on forward */
	291	INTERVAL backward_i; /* or backward movement. The
	292	data in c_s_t is valid
	293	between these intervals,
	294	and possibly at the
	295	intervals too, depending
	296	on: */
e2d8d746 RS	297	/* Offset for positions specified to UPDATE_SYNTAX_TABLE. */
e2d8d746 RS	298	int offset;
5eea1c5a RS	299	};
	300
	301	extern struct gl_state_s gl_state;
4f3a2f8d	302	extern EMACS_INT scan_words (EMACS_INT, EMACS_INT);
839966f3	303