X-Git-Url: https://code.delx.au/gnu-emacs/blobdiff_plain/c1ea566e860d52b74c56c2979282f90694818d69..290591c8fb6ac1e41686342d6a72619ba3c7c377:/src/buffer.h?ds=sidebyside diff --git a/src/buffer.h b/src/buffer.h index 16d8bc68f8..a26e6325aa 100644 --- a/src/buffer.h +++ b/src/buffer.h @@ -1,5 +1,5 @@ /* Header file for the buffer manipulation primitives. - Copyright (C) 1985, 1986, 1993, 1994 Free Software Foundation, Inc. + Copyright (C) 1985, 86, 93, 94, 95, 97, 1998 Free Software Foundation, Inc. This file is part of GNU Emacs. @@ -15,96 +15,131 @@ 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, 675 Mass Ave, Cambridge, MA 02139, USA. */ +the Free Software Foundation, Inc., 59 Temple Place - Suite 330, +Boston, MA 02111-1307, USA. */ -#ifdef USE_TEXT_PROPERTIES -#define SET_PT(position) (set_point ((position), current_buffer)) -#define TEMP_SET_PT(position) (temp_set_point ((position), current_buffer)) - -#define BUF_SET_PT(buffer, position) (set_point ((position), (buffer))) -#define BUF_TEMP_SET_PT(buffer, position) (temp_set_point ((position), (buffer))) - -#else /* don't support text properties */ - -#define SET_PT(position) (current_buffer->pt = (position)) -#define TEMP_SET_PT(position) (current_buffer->pt = (position)) +/* Accessing the parameters of the current buffer. */ -#define BUF_SET_PT(buffer, position) (buffer->pt = (position)) -#define BUF_TEMP_SET_PT(buffer, position) (buffer->pt = (position)) -#endif /* don't support text properties */ +/* These macros come in pairs, one for the char position + and one for the byte position. */ -/* Character position of beginning of buffer. */ +/* Position of beginning of buffer. */ #define BEG (1) +#define BEG_BYTE (1) -/* Character position of beginning of accessible range of buffer. */ +/* Position of beginning of accessible range of buffer. */ #define BEGV (current_buffer->begv) +#define BEGV_BYTE (current_buffer->begv_byte) -/* Character position of point in buffer. The "+ 0" makes this +/* Position of point in buffer. The "+ 0" makes this not an l-value, so you can't assign to it. Use SET_PT instead. */ #define PT (current_buffer->pt + 0) +#define PT_BYTE (current_buffer->pt_byte + 0) -/* Character position of gap in buffer. */ +/* Position of gap in buffer. */ #define GPT (current_buffer->text->gpt) +#define GPT_BYTE (current_buffer->text->gpt_byte) -/* Character position of end of accessible range of buffer. */ +/* Position of end of accessible range of buffer. */ #define ZV (current_buffer->zv) +#define ZV_BYTE (current_buffer->zv_byte) -/* Character position of end of buffer. */ +/* Position of end of buffer. */ #define Z (current_buffer->text->z) +#define Z_BYTE (current_buffer->text->z_byte) -/* Is the current buffer narrowed? */ -#define NARROWED ((BEGV != BEG) || (ZV != Z)) - -/* Modification count. */ -#define MODIFF (current_buffer->text->modiff) - -/* Modification count as of last visit or save. */ -#define SAVE_MODIFF (current_buffer->text->save_modiff) +/* Macros for the addresses of places in the buffer. */ /* Address of beginning of buffer. */ #define BEG_ADDR (current_buffer->text->beg) /* Address of beginning of accessible range of buffer. */ -#define BEGV_ADDR (&FETCH_CHAR (current_buffer->begv)) +#define BEGV_ADDR (BYTE_POS_ADDR (current_buffer->begv_byte)) /* Address of point in buffer. */ -#define PT_ADDR (&FETCH_CHAR (current_buffer->pt)) +#define PT_ADDR (BYTE_POS_ADDR (current_buffer->pt_byte)) /* Address of beginning of gap in buffer. */ -#define GPT_ADDR (current_buffer->text->beg + current_buffer->text->gpt - 1) +#define GPT_ADDR (current_buffer->text->beg + current_buffer->text->gpt_byte - 1) /* Address of end of gap in buffer. */ -#define GAP_END_ADDR (current_buffer->text->beg + current_buffer->text->gpt + current_buffer->text->gap_size - 1) +#define GAP_END_ADDR (current_buffer->text->beg + current_buffer->text->gpt_byte + current_buffer->text->gap_size - 1) /* Address of end of accessible range of buffer. */ -#define ZV_ADDR (&FETCH_CHAR (current_buffer->zv)) +#define ZV_ADDR (BYTE_POS_ADDR (current_buffer->zv_byte)) + +/* Address of end of buffer. */ +#define Z_ADDR (current_buffer->text->beg + current_buffer->text->gap_size + current_buffer->text->z_byte - 1) /* Size of gap. */ #define GAP_SIZE (current_buffer->text->gap_size) -/* Now similar macros for a specified buffer. +/* Is the current buffer narrowed? */ +#define NARROWED ((BEGV != BEG) || (ZV != Z)) + +/* Modification count. */ +#define MODIFF (current_buffer->text->modiff) + +/* Overlay modification count. */ +#define OVERLAY_MODIFF (current_buffer->text->overlay_modiff) + +/* Modification count as of last visit or save. */ +#define SAVE_MODIFF (current_buffer->text->save_modiff) + +/* BUFFER_CEILING_OF (resp. BUFFER_FLOOR_OF), when applied to n, return + the max (resp. min) p such that + + BYTE_POS_ADDR (p) - BYTE_POS_ADDR (n) == p - n */ + +#define BUFFER_CEILING_OF(BYTEPOS) \ + (((BYTEPOS) < GPT_BYTE && GPT < ZV ? GPT_BYTE : ZV_BYTE) - 1) +#define BUFFER_FLOOR_OF(BYTEPOS) \ + (BEGV <= GPT && GPT_BYTE <= (BYTEPOS) ? GPT_BYTE : BEGV_BYTE) + +/* Similar macros to operate on a specified buffer. Note that many of these evaluate the buffer argument more than once. */ -/* Character position of beginning of buffer. */ +/* Position of beginning of buffer. */ #define BUF_BEG(buf) (1) +#define BUF_BEG_BYTE(buf) (1) -/* Character position of beginning of accessible range of buffer. */ +/* Position of beginning of accessible range of buffer. */ #define BUF_BEGV(buf) ((buf)->begv) +#define BUF_BEGV_BYTE(buf) ((buf)->begv_byte) -/* Character position of point in buffer. */ +/* Position of point in buffer. */ #define BUF_PT(buf) ((buf)->pt) +#define BUF_PT_BYTE(buf) ((buf)->pt_byte) -/* Character position of gap in buffer. */ +/* Position of gap in buffer. */ #define BUF_GPT(buf) ((buf)->text->gpt) +#define BUF_GPT_BYTE(buf) ((buf)->text->gpt_byte) -/* Character position of end of accessible range of buffer. */ +/* Position of end of accessible range of buffer. */ #define BUF_ZV(buf) ((buf)->zv) +#define BUF_ZV_BYTE(buf) ((buf)->zv_byte) -/* Character position of end of buffer. */ +/* Position of end of buffer. */ #define BUF_Z(buf) ((buf)->text->z) +#define BUF_Z_BYTE(buf) ((buf)->text->z_byte) + +/* Address of beginning of buffer. */ +#define BUF_BEG_ADDR(buf) ((buf)->text->beg) + +/* Address of beginning of gap of buffer. */ +#define BUF_GPT_ADDR(buf) ((buf)->text->beg + (buf)->text->gpt_byte - 1) + +/* Address of end of buffer. */ +#define BUF_Z_ADDR(buf) ((buf)->text->beg + (buf)->text->gap_size + (buf)->text->z_byte - 1) + +/* Address of end of gap in buffer. */ +#define BUF_GAP_END_ADDR(buf) ((buf)->text->beg + (buf)->text->gpt_byte + (buf)->text->gap_size - 1) + +/* Size of gap. */ +#define BUF_GAP_SIZE(buf) ((buf)->text->gap_size) -/* Is this buffer narrowed? */ +/* Is this buffer narrowed? */ #define BUF_NARROWED(buf) ((BUF_BEGV (buf) != BUF_BEG (buf)) \ || (BUF_ZV (buf) != BUF_Z (buf))) @@ -114,47 +149,228 @@ the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ /* Modification count as of last visit or save. */ #define BUF_SAVE_MODIFF(buf) ((buf)->text->save_modiff) +/* Overlay modification count. */ +#define BUF_OVERLAY_MODIFF(buf) ((buf)->text->overlay_modiff) + /* Interval tree of buffer. */ #define BUF_INTERVALS(buf) ((buf)->text->intervals) /* Marker chain of buffer. */ #define BUF_MARKERS(buf) ((buf)->text->markers) + +/* Macros to set PT in the current buffer, or another buffer.. */ -/* Address of beginning of buffer. */ -#define BUF_BEG_ADDR(buf) ((buf)->text->beg) +#ifdef USE_TEXT_PROPERTIES +#define SET_PT(position) (set_point (current_buffer, (position))) +#define TEMP_SET_PT(position) (temp_set_point (current_buffer, (position))) -/* Macro for setting the value of BUF_ZV (BUF) to VALUE, - by varying the end of the accessible region. */ -#define SET_BUF_ZV(buf, value) ((buf)->zv = (value)) -#define SET_BUF_PT(buf, value) ((buf)->pt = (value)) +#define SET_PT_BOTH(position, byte) \ + (set_point_both (current_buffer, (position), (byte))) +#define TEMP_SET_PT_BOTH(position, byte) \ + (temp_set_point_both (current_buffer, (position), (byte))) -/* Size of gap. */ -#define BUF_GAP_SIZE(buf) ((buf)->text->gap_size) +#define BUF_SET_PT(buffer, position) \ + (set_point ((buffer), (position))) +#define BUF_TEMP_SET_PT(buffer, position) \ + (temp_set_point ((buffer), (position))) + +extern void set_point P_ ((struct buffer *, int)); +extern INLINE void temp_set_point P_ ((struct buffer *, int)); +extern void set_point_both P_ ((struct buffer *, int, int)); +extern INLINE void temp_set_point_both P_ ((struct buffer *, int, int)); + +#else /* don't support text properties */ + +#define SET_PT(position) (current_buffer->pt = (position)) +#define TEMP_SET_PT(position) (current_buffer->pt = (position)) + +#define SET_PT_BOTH(position, byte) \ + (current_buffer->pt = (position), \ + current_buffer->pt_byte = (byte)) -/* Return the address of character at position POS in buffer BUF. +#define TEMP_SET_PT_BOTH(position, byte) \ + (current_buffer->pt = (position), \ + current_buffer->pt_byte = (byte)) + +#define BUF_SET_PT(buffer, position) (buffer->pt = (position)) +#define BUF_TEMP_SET_PT(buffer, position) (buffer->pt = (position)) +#endif /* don't support text properties */ + +/* Macros for setting the BEGV, ZV or PT of a given buffer. + + SET_BUF_PT* seet to be redundant. Get rid of them? + + The ..._BOTH macros take both a charpos and a bytepos, + which must correspond to each other. + + The macros without ..._BOTH take just a charpos, + and compute the bytepos from it. */ + +#define SET_BUF_BEGV(buf, charpos) \ + ((buf)->begv_byte = buf_charpos_to_bytepos ((buf), (charpos)), \ + (buf)->begv = (charpos)) + +#define SET_BUF_ZV(buf, charpos) \ + ((buf)->zv_byte = buf_charpos_to_bytepos ((buf), (charpos)), \ + (buf)->zv = (charpos)) + +#define SET_BUF_BEGV_BOTH(buf, charpos, byte) \ + ((buf)->begv = (charpos), \ + (buf)->begv_byte = (byte)) + +#define SET_BUF_ZV_BOTH(buf, charpos, byte) \ + ((buf)->zv = (charpos), \ + (buf)->zv_byte = (byte)) + +#define SET_BUF_PT_BOTH(buf, charpos, byte) \ + ((buf)->pt = (charpos), \ + (buf)->pt_byte = (byte)) + +/* Macros to access a character or byte in the current buffer, + or convert between a byte position and an address. + These macros do not check that the position is in range. */ + +/* Access a Lisp position value in POS, + and store the charpos in CHARPOS and the bypepos in BYPEPOS. */ + +#define DECODE_POSITION(charpos, bytepos, pos) \ +if (1) \ + { \ + Lisp_Object __pos = (pos); \ + if (NUMBERP (__pos)) \ + { \ + charpos = __pos; \ + bytepos = buf_charpos_to_bytepos (current_buffer, __pos); \ + } \ + else if (MARKERP (__pos)) \ + { \ + charpos = marker_position (__pos); \ + bytepos = marker_byte_position (__pos); \ + } \ + else \ + wrong_type_argument (Qinteger_or_marker_p, __pos); \ + } \ +else + +/* Return the address of byte position N in current buffer. */ + +#define BYTE_POS_ADDR(n) \ + (((n) >= GPT_BYTE ? GAP_SIZE : 0) + (n) + BEG_ADDR - 1) + +/* Return the address of char position N. */ + +#define CHAR_POS_ADDR(n) \ + (((n) >= GPT ? GAP_SIZE : 0) \ + + buf_charpos_to_bytepos (current_buffer, n) \ + + BEG_ADDR - 1) + +/* Convert a character position to a byte position. */ + +#define CHAR_TO_BYTE(charpos) \ + (buf_charpos_to_bytepos (current_buffer, charpos)) + +/* Convert a byte position to a character position. */ + +#define BYTE_TO_CHAR(bytepos) \ + (buf_bytepos_to_charpos (current_buffer, bytepos)) + +/* Convert PTR, the address of a byte in the buffer, into a byte position. */ + +#define PTR_BYTE_POS(ptr) \ +((ptr) - (current_buffer)->text->beg \ + - (ptr - (current_buffer)->text->beg < (unsigned) GPT_BYTE ? 0 : GAP_SIZE) \ + + 1) + +/* Return character at position POS. */ + +#define FETCH_CHAR(pos) \ + (!NILP (current_buffer->enable_multibyte_characters) \ + ? FETCH_MULTIBYTE_CHAR ((pos)) \ + : FETCH_BYTE ((pos))) + +/* Return the byte at byte position N. */ + +#define FETCH_BYTE(n) *(BYTE_POS_ADDR ((n))) + +/* Variables used locally in FETCH_MULTIBYTE_CHAR. */ +extern unsigned char *_fetch_multibyte_char_p; +extern int _fetch_multibyte_char_len; + +/* Return character code of multi-byte form at position POS. If POS + doesn't point the head of valid multi-byte form, only the byte at + POS is returned. No range checking. */ + +#define FETCH_MULTIBYTE_CHAR(pos) \ + (_fetch_multibyte_char_p = (((pos) >= GPT_BYTE ? GAP_SIZE : 0) \ + + (pos) + BEG_ADDR - 1), \ + _fetch_multibyte_char_len \ + = ((pos) >= GPT_BYTE ? ZV_BYTE : GPT_BYTE) - (pos), \ + STRING_CHAR (_fetch_multibyte_char_p, _fetch_multibyte_char_len)) + +/* Macros for accessing a character or byte, + or converting between byte positions and addresses, + in a specified buffer. */ + +/* Return the address of character at byte position POS in buffer BUF. Note that both arguments can be computed more than once. */ -#define BUF_CHAR_ADDRESS(buf, pos) \ + +#define BUF_BYTE_ADDRESS(buf, pos) \ ((buf)->text->beg + (pos) - 1 \ + + ((pos) >= (buf)->text->gpt_byte ? (buf)->text->gap_size : 0)) + +/* Return the address of character at char position POS in buffer BUF. + Note that both arguments can be computed more than once. */ + +#define BUF_CHAR_ADDRESS(buf, pos) \ +((buf)->text->beg + buf_charpos_to_bytepos ((buf), (pos)) - 1 \ + ((pos) >= (buf)->text->gpt ? (buf)->text->gap_size : 0)) -/* Convert the address of a char in the buffer into a character position. */ -#define PTR_CHAR_POS(ptr) \ -((ptr) - (current_buffer)->text->beg \ - - (ptr - (current_buffer)->text->beg < (unsigned) GPT ? 0 : GAP_SIZE) \ - + 1) +/* Convert PTR, the address of a char in buffer BUF, + into a character position. */ -/* Convert the address of a char in the buffer into a character position. */ -#define BUF_PTR_CHAR_POS(buf, ptr) \ -((ptr) - (buf)->text->beg \ - - (ptr - (buf)->text->beg < (unsigned) BUF_GPT ((buf)) \ - ? 0 : BUF_GAP_SIZE ((buf))) \ +#define BUF_PTR_BYTE_POS(buf, ptr) \ +((ptr) - (buf)->text->beg \ + - (ptr - (buf)->text->beg < (unsigned) BUF_GPT_BYTE ((buf)) \ + ? 0 : BUF_GAP_SIZE ((buf))) \ + 1) + +/* Return the character at byte position POS in buffer BUF. */ + +#define BUF_FETCH_CHAR(buf, pos) \ + (!NILP (buf->enable_multibyte_characters) \ + ? BUF_FETCH_MULTIBYTE_CHAR ((buf), (pos)) \ + : BUF_FETCH_BYTE ((buf), (pos))) + +/* Return the byte at byte position N in buffer BUF. */ + +#define BUF_FETCH_BYTE(buf, n) \ + *(BUF_BYTE_ADDRESS ((buf), (n))) + +/* Return character code of multi-byte form at byte position POS in BUF. + If POS doesn't point the head of valid multi-byte form, only the byte at + POS is returned. No range checking. */ + +#define BUF_FETCH_MULTIBYTE_CHAR(buf, pos) \ + (_fetch_multibyte_char_p \ + = (((pos) >= BUF_GPT_BYTE (buf) ? BUF_GAP_SIZE (buf) : 0) \ + + (pos) + BUF_BEG_ADDR (buf) - 1), \ + _fetch_multibyte_char_len \ + = (((pos) >= BUF_GPT_BYTE (buf) ? BUF_ZV_BYTE (buf) : BUF_GPT_BYTE (buf)) \ + - (pos)), \ + STRING_CHAR (_fetch_multibyte_char_p, _fetch_multibyte_char_len)) +/* Define the actual buffer data structures. */ + +/* This data structure describes the actual text contents of a buffer. + It is shared between indirect buffers and their base buffer. */ + struct buffer_text { unsigned char *beg; /* Actual address of buffer contents. */ - int gpt; /* Index of gap in buffer. */ - int z; /* Index of end of buffer. */ + int gpt; /* Char pos of gap in buffer. */ + int z; /* Char pos of end of buffer. */ + int gpt_byte; /* Byte pos of gap in buffer. */ + int z_byte; /* Byte pos of end of buffer. */ int gap_size; /* Size of buffer's gap. */ int modiff; /* This counts buffer-modification events for this buffer. It is incremented for @@ -163,6 +379,8 @@ struct buffer_text int save_modiff; /* Previous value of modiff, as of last time buffer visited or saved a file. */ + int overlay_modiff; /* Counts modifications to overlays. */ + /* Properties of this buffer's text -- conditionally compiled. */ DECLARE_INTERVALS @@ -173,6 +391,8 @@ struct buffer_text Lisp_Object markers; }; +/* This is the structure that the buffer Lisp object points to. */ + struct buffer { /* Everything before the `name' slot must be of a non-Lisp_Object type, @@ -198,12 +418,18 @@ struct buffer In an indirect buffer, this is the own_text field of another buffer. */ struct buffer_text *text; - /* Position of point in buffer. */ + /* Char position of point in buffer. */ int pt; - /* Index of beginning of accessible range. */ + /* Byte position of point in buffer. */ + int pt_byte; + /* Char position of beginning of accessible range. */ int begv; - /* Index of end of accessible range. */ + /* Byte position of beginning of accessible range. */ + int begv_byte; + /* Char position of end of accessible range. */ int zv; + /* Byte position of end of accessible range. */ + int zv_byte; /* In an indirect buffer, this points to the base buffer. In an ordinary buffer, it is 0. */ @@ -226,6 +452,9 @@ struct buffer the last time this buffer was displayed. */ int last_window_start; + /* Set nonzero whenever the narrowing is changed in this buffer. */ + int clip_changed; + /* If the long line scan cache is enabled (i.e. the buffer-local variable cache-long-line-scans is non-nil), newline_cache points to the newline cache, and width_run_cache points to the @@ -291,6 +520,8 @@ struct buffer Lisp_Object abbrev_table; /* This buffer's syntax table. */ Lisp_Object syntax_table; + /* This buffer's category table. */ + Lisp_Object category_table; /* Values of several buffer-local variables */ /* tab-width is buffer-local so that redisplay can find it @@ -303,21 +534,27 @@ struct buffer Lisp_Object auto_fill_function; /* nil: text, t: binary. This value is meaningful only on certain operating systems. */ + /* Actually, we don't need this flag any more because end-of-line + is handled correctly according to the buffer-file-coding-system + of the buffer. Just keeping it for backward compatibility. */ Lisp_Object buffer_file_type; - /* String of length 256 mapping each char to its lower-case version. */ + /* Case table for case-conversion in this buffer. + This char-table maps each char into its lower-case version. */ Lisp_Object downcase_table; - /* String of length 256 mapping each char to its upper-case version. */ + /* Char-table mapping each char to its upper-case version. */ Lisp_Object upcase_table; - /* Translate table for case-folding search. */ + /* Char-table for conversion for case-folding search. */ Lisp_Object case_canon_table; - /* Inverse translate (equivalence class) table for case-folding search. */ + /* Char-table of equivalences for case-folding search. */ Lisp_Object case_eqv_table; /* Non-nil means do not display continuation lines. */ Lisp_Object truncate_lines; /* Non-nil means display ctl chars with uparrow. */ Lisp_Object ctl_arrow; + /* Non-nil means display text from right to left. */ + Lisp_Object direction_reversed; /* Non-nil means do selective display; see doc string in syms_of_buffer (buffer.c) for details. */ Lisp_Object selective_display; @@ -356,6 +593,17 @@ struct buffer /* Position where the overlay lists are centered. */ Lisp_Object overlay_center; + /* Non-nil means the buffer contents are regarded as multi-byte + form of characters, not a binary code. */ + Lisp_Object enable_multibyte_characters; + + /* Coding system to be used for encoding the buffer contents on + saving. */ + Lisp_Object buffer_file_coding_system; + + /* List of symbols naming the file format used for visited file. */ + Lisp_Object file_format; + /* True if the newline position cache and width run cache are enabled. See search.c and indent.c. */ Lisp_Object cache_long_line_scans; @@ -382,6 +630,30 @@ struct buffer indirect buffer, this holds a marker that records ZV for this buffer when the buffer is not current. */ Lisp_Object zv_marker; + + /* This holds the point value before the last scroll operation. + Explicitly setting point sets this to nil. */ + Lisp_Object point_before_scroll; + + /* Truename of the visited file, or nil. */ + Lisp_Object file_truename; + + /* Invisibility spec of this buffer. + t => any non-nil `invisible' property means invisible. + A list => `invisible' property means invisible + if it is memq in that list. */ + Lisp_Object invisibility_spec; + + /* This is the last window that was selected with this buffer in it, + or nil if that window no longer displays this buffer. */ + Lisp_Object last_selected_window; + + /* Incremented each time the buffer is displayed in a window. */ + Lisp_Object display_count; + + /* These are so we don't have to recompile everything + the next few times we add a new slot. */ + Lisp_Object extra2, extra3; }; /* This points to the current buffer. */ @@ -422,32 +694,33 @@ extern struct buffer buffer_local_symbols; buffer-local slots. If a slot contains Qnil, then the corresponding buffer slot may contain a value of any type. If a slot contains an integer, then prospective values' tags must be - equal to that integer. When a tag does not match, the function - buffer_slot_type_mismatch will signal an error. The value Qnil may - always be safely stored in any slot. */ -extern struct buffer buffer_local_types; - -/* Point in the current buffer. This is an obsolete alias - and should be eliminated. */ -#define point (current_buffer->pt + 0) - -/* Return character at position n. No range checking. */ -#define FETCH_CHAR(n) *(((n)>= GPT ? GAP_SIZE : 0) + (n) + BEG_ADDR - 1) + equal to that integer (except nil is always allowed). + When a tag does not match, the function + buffer_slot_type_mismatch will signal an error. -/* BUFFER_CEILING_OF (resp. BUFFER_FLOOR_OF), when applied to n, return - the max (resp. min) p such that - - &FETCH_CHAR (p) - &FETCH_CHAR (n) == p - n */ - -#define BUFFER_CEILING_OF(n) (((n) < GPT && GPT < ZV ? GPT : ZV) - 1) -#define BUFFER_FLOOR_OF(n) (BEGV <= GPT && GPT <= (n) ? GPT : BEGV) + If a slot here contains -1, the corresponding variable is read-only. */ -extern void reset_buffer (); -extern void evaporate_overlays (); - -extern Lisp_Object Fbuffer_name (); -extern Lisp_Object Fget_file_buffer (); -extern Lisp_Object Fnext_overlay_change (); +extern struct buffer buffer_local_types; + +extern void reset_buffer P_ ((struct buffer *)); +extern void evaporate_overlays P_ ((int)); +extern int overlays_at P_ ((int, int, Lisp_Object **, int *, int *, int *)); +extern int sort_overlays P_ ((Lisp_Object *, int, struct window *)); +extern void recenter_overlay_lists P_ ((struct buffer *, int)); +extern int overlay_strings P_ ((int, struct window *, unsigned char **)); +extern void validate_region P_ ((Lisp_Object *, Lisp_Object *)); +extern void set_buffer_internal P_ ((struct buffer *)); +extern void set_buffer_internal_1 P_ ((struct buffer *)); +extern void set_buffer_temp P_ ((struct buffer *)); +extern void record_buffer P_ ((Lisp_Object)); +extern void buffer_slot_type_mismatch P_ ((int)); +extern void fix_overlays_before P_ ((struct buffer *, int, int)); + + +EXFUN (Fbuffer_name, 1); +EXFUN (Fget_file_buffer, 1); +EXFUN (Fnext_overlay_change, 1); +EXFUN (Fdelete_overlay, 1); /* Functions to call before and after each text change. */ extern Lisp_Object Vbefore_change_function; @@ -455,6 +728,8 @@ extern Lisp_Object Vafter_change_function; extern Lisp_Object Vbefore_change_functions; extern Lisp_Object Vafter_change_functions; extern Lisp_Object Vfirst_change_hook; +extern Lisp_Object Qbefore_change_functions; +extern Lisp_Object Qafter_change_functions; extern Lisp_Object Qfirst_change_hook; extern Lisp_Object Vdeactivate_mark;