/* GNU Emacs routines to deal with syntax tables; also word and list parsing.
- Copyright (C) 1985, 1987, 1993, 1994, 1995 Free Software Foundation, Inc.
+ Copyright (C) 1985, 87, 93, 94, 95, 97, 1998, 1999 Free Software Foundation, Inc.
This file is part of GNU Emacs.
#include "commands.h"
#include "buffer.h"
#include "charset.h"
+#include "keymap.h"
+
+/* Make syntax table lookup grant data in gl_state. */
+#define SYNTAX_ENTRY_VIA_PROPERTY
+
#include "syntax.h"
+#include "intervals.h"
+
+/* We use these constants in place for comment-style and
+ string-ender-char to distinguish comments/strings started by
+ comment_fence and string_fence codes. */
+
+#define ST_COMMENT_STYLE (256 + 1)
+#define ST_STRING_STYLE (256 + 2)
#include "category.h"
Lisp_Object Qsyntax_table_p, Qsyntax_table, Qscan_error;
-static void scan_sexps_forward ();
-static int char_quoted ();
-
int words_include_escapes;
+int parse_sexp_lookup_properties;
+
+/* Nonzero means `scan-sexps' treat all multibyte characters as symbol. */
+int multibyte_syntax_as_symbol;
/* Used as a temporary in SYNTAX_ENTRY and other macros in syntax.h,
if not compiled with GCC. No need to mark it, since it is used
only very temporarily. */
Lisp_Object syntax_temp;
+/* Non-zero means an open parenthesis in column 0 is always considered
+ to be the start of a defun. Zero means an open parenthesis in
+ column 0 has no special meaning. */
+
+int open_paren_in_column_0_is_defun_start;
+
/* This is the internal form of the parse state used in parse-partial-sexp. */
struct lisp_parse_state
{
- int depth; /* Depth at end of parsing */
- int instring; /* -1 if not within string, else desired terminator. */
- int incomment; /* Nonzero if within a comment at end of parsing */
- int comstyle; /* comment style a=0, or b=1 */
+ int depth; /* Depth at end of parsing. */
+ int instring; /* -1 if not within string, else desired terminator. */
+ int incomment; /* -1 if in unnestable comment else comment nesting */
+ int comstyle; /* comment style a=0, or b=1, or ST_COMMENT_STYLE. */
int quoted; /* Nonzero if just after an escape char at end of parsing */
int thislevelstart; /* Char number of most recent start-of-expression at current level */
int prevlevelstart; /* Char number of start of containing expression */
- int location; /* Char number at which parsing stopped. */
+ int location; /* Char number at which parsing stopped. */
int mindepth; /* Minimum depth seen while scanning. */
- int comstart; /* Position just after last comment starter. */
+ int comstr_start; /* Position just after last comment/string starter. */
+ Lisp_Object levelstarts; /* Char numbers of starts-of-expression
+ of levels (starting from outermost). */
};
\f
/* These variables are a cache for finding the start of a defun.
find_start_pos is the place for which the defun start was found.
find_start_value is the defun start position found for it.
+ find_start_value_byte is the corresponding byte position.
find_start_buffer is the buffer it was found in.
find_start_begv is the BEGV value when it was found.
find_start_modiff is the value of MODIFF when it was found. */
static int find_start_pos;
static int find_start_value;
+static int find_start_value_byte;
static struct buffer *find_start_buffer;
static int find_start_begv;
static int find_start_modiff;
-/* Find a defun-start that is the last one before POS (or nearly the last).
- We record what we find, so that another call in the same area
- can return the same value right away. */
+
+static int find_defun_start P_ ((int, int));
+static int back_comment P_ ((int, int, int, int, int, int *, int *));
+static int char_quoted P_ ((int, int));
+static Lisp_Object skip_chars P_ ((int, int, Lisp_Object, Lisp_Object));
+static Lisp_Object scan_lists P_ ((int, int, int, int));
+static void scan_sexps_forward P_ ((struct lisp_parse_state *,
+ int, int, int, int,
+ int, Lisp_Object, int));
+\f
+
+struct gl_state_s gl_state; /* Global state of syntax parser. */
+
+INTERVAL interval_of ();
+#define INTERVALS_AT_ONCE 10 /* 1 + max-number of intervals
+ to scan to property-change. */
+
+/* Update gl_state to an appropriate interval which contains CHARPOS. The
+ sign of COUNT give the relative position of CHARPOS wrt the previously
+ valid interval. If INIT, only [be]_property fields of gl_state are
+ valid at start, the rest is filled basing on OBJECT.
+
+ `gl_state.*_i' are the intervals, and CHARPOS is further in the search
+ direction than the intervals - or in an interval. We update the
+ current syntax-table basing on the property of this interval, and
+ update the interval to start further than CHARPOS - or be
+ NULL_INTERVAL. We also update lim_property to be the next value of
+ charpos to call this subroutine again - or be before/after the
+ start/end of OBJECT. */
+
+void
+update_syntax_table (charpos, count, init, object)
+ int charpos, count, init;
+ Lisp_Object object;
+{
+ Lisp_Object tmp_table;
+ int cnt = 0, invalidate = 1;
+ INTERVAL i, oldi;
+
+ if (init)
+ {
+ gl_state.old_prop = Qnil;
+ gl_state.start = gl_state.b_property;
+ gl_state.stop = gl_state.e_property;
+ i = interval_of (charpos, object);
+ gl_state.backward_i = gl_state.forward_i = i;
+ invalidate = 0;
+ if (NULL_INTERVAL_P (i))
+ return;
+ /* interval_of updates only ->position of the return value, so
+ update the parents manually to speed up update_interval. */
+ while (!NULL_PARENT (i))
+ {
+ if (AM_RIGHT_CHILD (i))
+ INTERVAL_PARENT (i)->position = i->position
+ - LEFT_TOTAL_LENGTH (i) + TOTAL_LENGTH (i) /* right end */
+ - TOTAL_LENGTH (INTERVAL_PARENT (i))
+ + LEFT_TOTAL_LENGTH (INTERVAL_PARENT (i));
+ else
+ INTERVAL_PARENT (i)->position = i->position - LEFT_TOTAL_LENGTH (i)
+ + TOTAL_LENGTH (i);
+ i = INTERVAL_PARENT (i);
+ }
+ i = gl_state.forward_i;
+ gl_state.b_property = i->position - gl_state.offset;
+ gl_state.e_property = INTERVAL_LAST_POS (i) - gl_state.offset;
+ goto update;
+ }
+ oldi = i = count > 0 ? gl_state.forward_i : gl_state.backward_i;
+
+ /* We are guaranteed to be called with CHARPOS either in i,
+ or further off. */
+ if (NULL_INTERVAL_P (i))
+ error ("Error in syntax_table logic for to-the-end intervals");
+ else if (charpos < i->position) /* Move left. */
+ {
+ if (count > 0)
+ error ("Error in syntax_table logic for intervals <-");
+ /* Update the interval. */
+ i = update_interval (i, charpos);
+ if (INTERVAL_LAST_POS (i) != gl_state.b_property)
+ {
+ invalidate = 0;
+ gl_state.forward_i = i;
+ gl_state.e_property = INTERVAL_LAST_POS (i) - gl_state.offset;
+ }
+ }
+ else if (charpos >= INTERVAL_LAST_POS (i)) /* Move right. */
+ {
+ if (count < 0)
+ error ("Error in syntax_table logic for intervals ->");
+ /* Update the interval. */
+ i = update_interval (i, charpos);
+ if (i->position != gl_state.e_property)
+ {
+ invalidate = 0;
+ gl_state.backward_i = i;
+ gl_state.b_property = i->position - gl_state.offset;
+ }
+ }
+
+ update:
+ tmp_table = textget (i->plist, Qsyntax_table);
+
+ if (invalidate)
+ invalidate = !EQ (tmp_table, gl_state.old_prop); /* Need to invalidate? */
+
+ if (invalidate) /* Did not get to adjacent interval. */
+ { /* with the same table => */
+ /* invalidate the old range. */
+ if (count > 0)
+ {
+ gl_state.backward_i = i;
+ gl_state.b_property = i->position - gl_state.offset;
+ }
+ else
+ {
+ gl_state.forward_i = i;
+ gl_state.e_property = INTERVAL_LAST_POS (i) - gl_state.offset;
+ }
+ }
+
+ if (!EQ (tmp_table, gl_state.old_prop))
+ {
+ gl_state.current_syntax_table = tmp_table;
+ gl_state.old_prop = tmp_table;
+ if (EQ (Fsyntax_table_p (tmp_table), Qt))
+ {
+ gl_state.use_global = 0;
+ }
+ else if (CONSP (tmp_table))
+ {
+ gl_state.use_global = 1;
+ gl_state.global_code = tmp_table;
+ }
+ else
+ {
+ gl_state.use_global = 0;
+ gl_state.current_syntax_table = current_buffer->syntax_table;
+ }
+ }
+
+ while (!NULL_INTERVAL_P (i))
+ {
+ if (cnt && !EQ (tmp_table, textget (i->plist, Qsyntax_table)))
+ {
+ if (count > 0)
+ {
+ gl_state.e_property = i->position - gl_state.offset;
+ gl_state.forward_i = i;
+ }
+ else
+ {
+ gl_state.b_property = i->position + LENGTH (i) - gl_state.offset;
+ gl_state.backward_i = i;
+ }
+ return;
+ }
+ else if (cnt == INTERVALS_AT_ONCE)
+ {
+ if (count > 0)
+ {
+ gl_state.e_property = i->position + LENGTH (i) - gl_state.offset;
+ gl_state.forward_i = i;
+ }
+ else
+ {
+ gl_state.b_property = i->position - gl_state.offset;
+ gl_state.backward_i = i;
+ }
+ return;
+ }
+ cnt++;
+ i = count > 0 ? next_interval (i) : previous_interval (i);
+ }
+ eassert (NULL_INTERVAL_P (i)); /* This property goes to the end. */
+ if (count > 0)
+ gl_state.e_property = gl_state.stop;
+ else
+ gl_state.b_property = gl_state.start;
+}
+\f
+/* Returns TRUE if char at CHARPOS is quoted.
+ Global syntax-table data should be set up already to be good at CHARPOS
+ or after. On return global syntax data is good for lookup at CHARPOS. */
static int
-find_defun_start (pos)
- int pos;
+char_quoted (charpos, bytepos)
+ register int charpos, bytepos;
{
- int tem;
- int shortage;
+ register enum syntaxcode code;
+ register int beg = BEGV;
+ register int quoted = 0;
+ int orig = charpos;
+
+ DEC_BOTH (charpos, bytepos);
+
+ while (bytepos >= beg)
+ {
+ UPDATE_SYNTAX_TABLE_BACKWARD (charpos);
+ code = SYNTAX (FETCH_CHAR (bytepos));
+ if (! (code == Scharquote || code == Sescape))
+ break;
+
+ DEC_BOTH (charpos, bytepos);
+ quoted = !quoted;
+ }
+
+ UPDATE_SYNTAX_TABLE (orig);
+ return quoted;
+}
+
+/* Return the bytepos one character after BYTEPOS.
+ We assume that BYTEPOS is not at the end of the buffer. */
+
+INLINE int
+inc_bytepos (bytepos)
+ int bytepos;
+{
+ if (NILP (current_buffer->enable_multibyte_characters))
+ return bytepos + 1;
+
+ INC_POS (bytepos);
+ return bytepos;
+}
+
+/* Return the bytepos one character before BYTEPOS.
+ We assume that BYTEPOS is not at the start of the buffer. */
+
+INLINE int
+dec_bytepos (bytepos)
+ int bytepos;
+{
+ if (NILP (current_buffer->enable_multibyte_characters))
+ return bytepos - 1;
+
+ DEC_POS (bytepos);
+ return bytepos;
+}
+\f
+/* Return a defun-start position before before POS and not too far before.
+ It should be the last one before POS, or nearly the last.
+
+ When open_paren_in_column_0_is_defun_start is nonzero,
+ the beginning of every line is treated as a defun-start.
+
+ We record the information about where the scan started
+ and what its result was, so that another call in the same area
+ can return the same value very quickly.
+
+ There is no promise at which position the global syntax data is
+ valid on return from the subroutine, so the caller should explicitly
+ update the global data. */
+
+static int
+find_defun_start (pos, pos_byte)
+ int pos, pos_byte;
+{
+ int opoint = PT, opoint_byte = PT_BYTE;
/* Use previous finding, if it's valid and applies to this inquiry. */
if (current_buffer == find_start_buffer
return find_start_value;
/* Back up to start of line. */
- tem = scan_buffer ('\n', pos, BEGV, -1, &shortage, 1);
-
- while (tem > BEGV)
+ scan_newline (pos, pos_byte, BEGV, BEGV_BYTE, -1, 1);
+
+ /* We optimize syntax-table lookup for rare updates. Thus we accept
+ only those `^\s(' which are good in global _and_ text-property
+ syntax-tables. */
+ gl_state.current_syntax_table = current_buffer->syntax_table;
+ gl_state.use_global = 0;
+ if (open_paren_in_column_0_is_defun_start)
{
- /* Open-paren at start of line means we found our defun-start. */
- if (SYNTAX (FETCH_CHAR (tem)) == Sopen)
- break;
- /* Move to beg of previous line. */
- tem = scan_buffer ('\n', tem, BEGV, -2, &shortage, 1);
+ while (PT > BEGV)
+ {
+ /* Open-paren at start of line means we may have found our
+ defun-start. */
+ if (SYNTAX (FETCH_CHAR (PT_BYTE)) == Sopen)
+ {
+ SETUP_SYNTAX_TABLE (PT + 1, -1); /* Try again... */
+ if (SYNTAX (FETCH_CHAR (PT_BYTE)) == Sopen)
+ break;
+ /* Now fallback to the default value. */
+ gl_state.current_syntax_table = current_buffer->syntax_table;
+ gl_state.use_global = 0;
+ }
+ /* Move to beg of previous line. */
+ scan_newline (PT, PT_BYTE, BEGV, BEGV_BYTE, -2, 1);
+ }
}
/* Record what we found, for the next try. */
- find_start_value = tem;
+ find_start_value = PT;
+ find_start_value_byte = PT_BYTE;
find_start_buffer = current_buffer;
find_start_modiff = MODIFF;
find_start_begv = BEGV;
find_start_pos = pos;
+ TEMP_SET_PT_BOTH (opoint, opoint_byte);
+
return find_start_value;
}
\f
+/* Return the SYNTAX_COMEND_FIRST of the character before POS, POS_BYTE. */
+
+static int
+prev_char_comend_first (pos, pos_byte)
+ int pos, pos_byte;
+{
+ int c, val;
+
+ DEC_BOTH (pos, pos_byte);
+ UPDATE_SYNTAX_TABLE_BACKWARD (pos);
+ c = FETCH_CHAR (pos_byte);
+ val = SYNTAX_COMEND_FIRST (c);
+ UPDATE_SYNTAX_TABLE_FORWARD (pos + 1);
+ return val;
+}
+
+/* Return the SYNTAX_COMSTART_FIRST of the character before POS, POS_BYTE. */
+
+/* static int
+ * prev_char_comstart_first (pos, pos_byte)
+ * int pos, pos_byte;
+ * {
+ * int c, val;
+ *
+ * DEC_BOTH (pos, pos_byte);
+ * UPDATE_SYNTAX_TABLE_BACKWARD (pos);
+ * c = FETCH_CHAR (pos_byte);
+ * val = SYNTAX_COMSTART_FIRST (c);
+ * UPDATE_SYNTAX_TABLE_FORWARD (pos + 1);
+ * return val;
+ * } */
+
+/* Checks whether charpos FROM is at the end of a comment.
+ FROM_BYTE is the bytepos corresponding to FROM.
+ Do not move back before STOP.
+
+ Return a positive value if we find a comment ending at FROM/FROM_BYTE;
+ return -1 otherwise.
+
+ If successful, store the charpos of the comment's beginning
+ into *CHARPOS_PTR, and the bytepos into *BYTEPOS_PTR.
+
+ Global syntax data remains valid for backward search starting at
+ the returned value (or at FROM, if the search was not successful). */
+
+static int
+back_comment (from, from_byte, stop, comnested, comstyle, charpos_ptr, bytepos_ptr)
+ int from, from_byte, stop;
+ int comnested, comstyle;
+ int *charpos_ptr, *bytepos_ptr;
+{
+ /* Look back, counting the parity of string-quotes,
+ and recording the comment-starters seen.
+ When we reach a safe place, assume that's not in a string;
+ then step the main scan to the earliest comment-starter seen
+ an even number of string quotes away from the safe place.
+
+ OFROM[I] is position of the earliest comment-starter seen
+ which is I+2X quotes from the comment-end.
+ PARITY is current parity of quotes from the comment end. */
+ int string_style = -1; /* Presumed outside of any string. */
+ int string_lossage = 0;
+ /* Not a real lossage: indicates that we have passed a matching comment
+ starter plus an non-matching comment-ender, meaning that any matching
+ comment-starter we might see later could be a false positive (hidden
+ inside another comment).
+ Test case: { a (* b } c (* d *) */
+ int comment_lossage = 0;
+ int comment_end = from;
+ int comment_end_byte = from_byte;
+ int comstart_pos = 0;
+ int comstart_byte;
+ /* Place where the containing defun starts,
+ or 0 if we didn't come across it yet. */
+ int defun_start = 0;
+ int defun_start_byte = 0;
+ register enum syntaxcode code;
+ int nesting = 1; /* current comment nesting */
+ int c;
+ int syntax = 0;
+
+ /* FIXME: A }} comment-ender style leads to incorrect behavior
+ in the case of {{ c }}} because we ignore the last two chars which are
+ assumed to be comment-enders although they aren't. */
+
+ /* At beginning of range to scan, we're outside of strings;
+ that determines quote parity to the comment-end. */
+ while (from != stop)
+ {
+ int temp_byte, prev_syntax;
+ int com2start, com2end;
+
+ /* Move back and examine a character. */
+ DEC_BOTH (from, from_byte);
+ UPDATE_SYNTAX_TABLE_BACKWARD (from);
+
+ prev_syntax = syntax;
+ c = FETCH_CHAR (from_byte);
+ syntax = SYNTAX_WITH_FLAGS (c);
+ code = SYNTAX (c);
+
+ /* Check for 2-char comment markers. */
+ com2start = (SYNTAX_FLAGS_COMSTART_FIRST (syntax)
+ && SYNTAX_FLAGS_COMSTART_SECOND (prev_syntax)
+ && comstyle == SYNTAX_FLAGS_COMMENT_STYLE (prev_syntax)
+ && (SYNTAX_FLAGS_COMMENT_NESTED (prev_syntax)
+ || SYNTAX_FLAGS_COMMENT_NESTED (syntax)) == comnested);
+ com2end = (SYNTAX_FLAGS_COMEND_FIRST (syntax)
+ && SYNTAX_FLAGS_COMEND_SECOND (prev_syntax));
+
+ /* Nasty cases with overlapping 2-char comment markers:
+ - snmp-mode: -- c -- foo -- c --
+ --- c --
+ ------ c --
+ - c-mode: *||*
+ |* *|* *|
+ |*| |* |*|
+ /// */
+
+ /* If a 2-char comment sequence partly overlaps with another,
+ we don't try to be clever. */
+ if (from > stop && (com2end || com2start))
+ {
+ int next = from, next_byte = from_byte, next_c, next_syntax;
+ DEC_BOTH (next, next_byte);
+ UPDATE_SYNTAX_TABLE_BACKWARD (next);
+ next_c = FETCH_CHAR (next_byte);
+ next_syntax = SYNTAX_WITH_FLAGS (next_c);
+ if (((com2start || comnested)
+ && SYNTAX_FLAGS_COMEND_SECOND (syntax)
+ && SYNTAX_FLAGS_COMEND_FIRST (next_syntax))
+ || ((com2end || comnested)
+ && SYNTAX_FLAGS_COMSTART_SECOND (syntax)
+ && comstyle == SYNTAX_FLAGS_COMMENT_STYLE (syntax)
+ && SYNTAX_FLAGS_COMSTART_FIRST (next_syntax)))
+ goto lossage;
+ /* UPDATE_SYNTAX_TABLE_FORWARD (next + 1); */
+ }
+
+ if (com2start && comstart_pos == 0)
+ /* We're looking at a comment starter. But it might be a comment
+ ender as well (see snmp-mode). The first time we see one, we
+ need to consider it as a comment starter,
+ and the subsequent times as a comment ender. */
+ com2end = 0;
+
+ /* Turn a 2-char comment sequences into the appropriate syntax. */
+ if (com2end)
+ code = Sendcomment;
+ else if (com2start)
+ code = Scomment;
+ /* Ignore comment starters of a different style. */
+ else if (code == Scomment
+ && (comstyle != SYNTAX_FLAGS_COMMENT_STYLE (syntax)
+ || SYNTAX_FLAGS_COMMENT_NESTED (syntax) != comnested))
+ continue;
+
+ /* Ignore escaped characters, except comment-enders. */
+ if (code != Sendcomment && char_quoted (from, from_byte))
+ continue;
+
+ switch (code)
+ {
+ case Sstring_fence:
+ case Scomment_fence:
+ c = (code == Sstring_fence ? ST_STRING_STYLE : ST_COMMENT_STYLE);
+ case Sstring:
+ /* Track parity of quotes. */
+ if (string_style == -1)
+ /* Entering a string. */
+ string_style = c;
+ else if (string_style == c)
+ /* Leaving the string. */
+ string_style = -1;
+ else
+ /* If we have two kinds of string delimiters.
+ There's no way to grok this scanning backwards. */
+ string_lossage = 1;
+ break;
+
+ case Scomment:
+ /* We've already checked that it is the relevant comstyle. */
+ if (string_style != -1 || comment_lossage || string_lossage)
+ /* There are odd string quotes involved, so let's be careful.
+ Test case in Pascal: " { " a { " } */
+ goto lossage;
+
+ if (!comnested)
+ {
+ /* Record best comment-starter so far. */
+ comstart_pos = from;
+ comstart_byte = from_byte;
+ }
+ else if (--nesting <= 0)
+ /* nested comments have to be balanced, so we don't need to
+ keep looking for earlier ones. We use here the same (slightly
+ incorrect) reasoning as below: since it is followed by uniform
+ paired string quotes, this comment-start has to be outside of
+ strings, else the comment-end itself would be inside a string. */
+ goto done;
+ break;
+
+ case Sendcomment:
+ if (SYNTAX_FLAGS_COMMENT_STYLE (syntax) == comstyle
+ && (SYNTAX_FLAGS_COMMENT_NESTED (prev_syntax)
+ || SYNTAX_FLAGS_COMMENT_NESTED (syntax)) == comnested)
+ /* This is the same style of comment ender as ours. */
+ {
+ if (comnested)
+ nesting++;
+ else
+ /* Anything before that can't count because it would match
+ this comment-ender rather than ours. */
+ from = stop; /* Break out of the loop. */
+ }
+ else if (comstart_pos != 0 || c != '\n')
+ /* We're mixing comment styles here, so we'd better be careful.
+ The (comstart_pos != 0 || c != '\n') check is not quite correct
+ (we should just always set comment_lossage), but removing it
+ would imply that any multiline comment in C would go through
+ lossage, which seems overkill.
+ The failure should only happen in the rare cases such as
+ { (* } *) */
+ comment_lossage = 1;
+ break;
+
+ case Sopen:
+ /* Assume a defun-start point is outside of strings. */
+ if (open_paren_in_column_0_is_defun_start
+ && (from == stop
+ || (temp_byte = dec_bytepos (from_byte),
+ FETCH_CHAR (temp_byte) == '\n')))
+ {
+ defun_start = from;
+ defun_start_byte = from_byte;
+ from = stop; /* Break out of the loop. */
+ }
+ break;
+
+ default:
+ break;
+ }
+ }
+
+ if (comstart_pos == 0)
+ {
+ from = comment_end;
+ from_byte = comment_end_byte;
+ UPDATE_SYNTAX_TABLE_FORWARD (comment_end - 1);
+ }
+ /* If comstart_pos is set and we get here (ie. didn't jump to `lossage'
+ or `done'), then we've found the beginning of the non-nested comment. */
+ else if (1) /* !comnested */
+ {
+ from = comstart_pos;
+ from_byte = comstart_byte;
+ /* Globals are correct now. */
+ }
+ else
+ {
+ struct lisp_parse_state state;
+ lossage:
+ /* We had two kinds of string delimiters mixed up
+ together. Decode this going forwards.
+ Scan fwd from a known safe place (beginning-of-defun)
+ to the one in question; this records where we
+ last passed a comment starter. */
+ /* If we did not already find the defun start, find it now. */
+ if (defun_start == 0)
+ {
+ defun_start = find_defun_start (comment_end, comment_end_byte);
+ defun_start_byte = find_start_value_byte;
+ }
+ do
+ {
+ scan_sexps_forward (&state,
+ defun_start, defun_start_byte,
+ comment_end, -10000, 0, Qnil, 0);
+ defun_start = comment_end;
+ if (state.incomment == (comnested ? 1 : -1)
+ && state.comstyle == comstyle)
+ from = state.comstr_start;
+ else
+ {
+ from = comment_end;
+ if (state.incomment)
+ /* If comment_end is inside some other comment, maybe ours
+ is nested, so we need to try again from within the
+ surrounding comment. Example: { a (* " *) */
+ {
+ /* FIXME: We should advance by one or two chars. */
+ defun_start = state.comstr_start + 2;
+ defun_start_byte = CHAR_TO_BYTE (defun_start);
+ }
+ }
+ } while (defun_start < comment_end);
+
+ from_byte = CHAR_TO_BYTE (from);
+ UPDATE_SYNTAX_TABLE_FORWARD (from - 1);
+ }
+
+ done:
+ *charpos_ptr = from;
+ *bytepos_ptr = from_byte;
+
+ return (from == comment_end) ? -1 : from;
+}
+\f
DEFUN ("syntax-table-p", Fsyntax_table_p, Ssyntax_table_p, 1, 1, 0,
- "Return t if OBJECT is a syntax table.\n\
-Currently, any char-table counts as a syntax table.")
- (object)
+ doc: /* Return t if OBJECT is a syntax table.
+Currently, any char-table counts as a syntax table. */)
+ (object)
Lisp_Object object;
{
if (CHAR_TABLE_P (object)
- && XCHAR_TABLE (object)->purpose == Qsyntax_table)
+ && EQ (XCHAR_TABLE (object)->purpose, Qsyntax_table))
return Qt;
return Qnil;
}
Lisp_Object obj;
{
if (!(CHAR_TABLE_P (obj)
- && XCHAR_TABLE (obj)->purpose == Qsyntax_table))
+ && EQ (XCHAR_TABLE (obj)->purpose, Qsyntax_table)))
wrong_type_argument (Qsyntax_table_p, obj);
}
DEFUN ("syntax-table", Fsyntax_table, Ssyntax_table, 0, 0, 0,
- "Return the current syntax table.\n\
-This is the one specified by the current buffer.")
- ()
+ doc: /* Return the current syntax table.
+This is the one specified by the current buffer. */)
+ ()
{
return current_buffer->syntax_table;
}
DEFUN ("standard-syntax-table", Fstandard_syntax_table,
Sstandard_syntax_table, 0, 0, 0,
- "Return the standard syntax table.\n\
-This is the one used for new buffers.")
- ()
+ doc: /* Return the standard syntax table.
+This is the one used for new buffers. */)
+ ()
{
return Vstandard_syntax_table;
}
DEFUN ("copy-syntax-table", Fcopy_syntax_table, Scopy_syntax_table, 0, 1, 0,
- "Construct a new syntax table and return it.\n\
-It is a copy of the TABLE, which defaults to the standard syntax table.")
- (table)
+ doc: /* Construct a new syntax table and return it.
+It is a copy of the TABLE, which defaults to the standard syntax table. */)
+ (table)
Lisp_Object table;
{
Lisp_Object copy;
}
DEFUN ("set-syntax-table", Fset_syntax_table, Sset_syntax_table, 1, 1, 0,
- "Select a new syntax table for the current buffer.\n\
-One argument, a syntax table.")
- (table)
+ doc: /* Select a new syntax table for the current buffer.
+One argument, a syntax table. */)
+ (table)
Lisp_Object table;
{
+ int idx;
check_syntax_table (table);
current_buffer->syntax_table = table;
/* Indicate that this buffer now has a specified syntax table. */
- current_buffer->local_var_flags
- |= XFASTINT (buffer_local_flags.syntax_table);
+ idx = PER_BUFFER_VAR_IDX (syntax_table);
+ SET_PER_BUFFER_VALUE_P (current_buffer, idx, 1);
return table;
}
\f
/* Convert a letter which signifies a syntax code
into the code it signifies.
- This is used by modify-syntax-entry, and other things. */
+ This is used by modify-syntax-entry, and other things. */
unsigned char syntax_spec_code[0400] =
{ 0377, 0377, 0377, 0377, 0377, 0377, 0377, 0377,
0377, 0377, 0377, 0377, 0377, 0377, 0377, 0377,
0377, 0377, 0377, 0377, 0377, 0377, 0377, 0377,
0377, 0377, 0377, 0377, 0377, 0377, 0377, 0377,
- (char) Swhitespace, 0377, (char) Sstring, 0377,
+ (char) Swhitespace, (char) Scomment_fence, (char) Sstring, 0377,
(char) Smath, 0377, 0377, (char) Squote,
(char) Sopen, (char) Sclose, 0377, 0377,
0377, (char) Swhitespace, (char) Spunct, (char) Scharquote,
0377, 0377, 0377, 0377, 0377, 0377, 0377, 0377, /* `, a, ... */
0377, 0377, 0377, 0377, 0377, 0377, 0377, 0377,
0377, 0377, 0377, 0377, 0377, 0377, 0377, (char) Sword,
- 0377, 0377, 0377, 0377, 0377, 0377, 0377, 0377
+ 0377, 0377, 0377, 0377, (char) Sstring_fence, 0377, 0377, 0377
};
-/* Indexed by syntax code, give the letter that describes it. */
+/* Indexed by syntax code, give the letter that describes it. */
-char syntax_code_spec[14] =
+char syntax_code_spec[16] =
{
- ' ', '.', 'w', '_', '(', ')', '\'', '\"', '$', '\\', '/', '<', '>', '@'
+ ' ', '.', 'w', '_', '(', ')', '\'', '\"', '$', '\\', '/', '<', '>', '@',
+ '!', '|'
};
/* Indexed by syntax code, give the object (cons of syntax code and
}
DEFUN ("char-syntax", Fchar_syntax, Schar_syntax, 1, 1, 0,
- "Return the syntax code of CHARACTER, described by a character.\n\
-For example, if CHARACTER is a word constituent,\n\
-the character `w' is returned.\n\
-The characters that correspond to various syntax codes\n\
-are listed in the documentation of `modify-syntax-entry'.")
- (character)
+ doc: /* Return the syntax code of CHARACTER, described by a character.
+For example, if CHARACTER is a word constituent,
+the character `w' is returned.
+The characters that correspond to various syntax codes
+are listed in the documentation of `modify-syntax-entry'. */)
+ (character)
Lisp_Object character;
{
int char_int;
- CHECK_NUMBER (character, 0);
+ gl_state.current_syntax_table = current_buffer->syntax_table;
+
+ gl_state.use_global = 0;
+ CHECK_NUMBER (character);
char_int = XINT (character);
return make_number (syntax_code_spec[(int) SYNTAX (char_int)]);
}
DEFUN ("matching-paren", Fmatching_paren, Smatching_paren, 1, 1, 0,
- "Return the matching parenthesis of CHARACTER, or nil if none.")
- (character)
+ doc: /* Return the matching parenthesis of CHARACTER, or nil if none. */)
+ (character)
Lisp_Object character;
{
int char_int, code;
- CHECK_NUMBER (character, 0);
+ gl_state.current_syntax_table = current_buffer->syntax_table;
+ gl_state.use_global = 0;
+ CHECK_NUMBER (character);
char_int = XINT (character);
code = SYNTAX (char_int);
if (code == Sopen || code == Sclose)
- return make_number (SYNTAX_MATCH (char_int));
+ return SYNTAX_MATCH (char_int);
return Qnil;
}
-/* This comment supplies the doc string for modify-syntax-entry,
- for make-docfile to see. We cannot put this in the real DEFUN
- due to limits in the Unix cpp.
-
-DEFUN ("modify-syntax-entry", foo, bar, 2, 3, 0,
- "Set syntax for character CHAR according to string S.\n\
-The syntax is changed only for table TABLE, which defaults to\n\
- the current buffer's syntax table.\n\
-The first character of S should be one of the following:\n\
- Space or - whitespace syntax. w word constituent.\n\
- _ symbol constituent. . punctuation.\n\
- ( open-parenthesis. ) close-parenthesis.\n\
- \" string quote. \\ escape.\n\
- $ paired delimiter. ' expression quote or prefix operator.\n\
- < comment starter. > comment ender.\n\
- / character-quote. @ inherit from `standard-syntax-table'.\n\
-\n\
-Only single-character comment start and end sequences are represented thus.\n\
-Two-character sequences are represented as described below.\n\
-The second character of S is the matching parenthesis,\n\
- used only if the first character is `(' or `)'.\n\
-Any additional characters are flags.\n\
-Defined flags are the characters 1, 2, 3, 4, b, and p.\n\
- 1 means CHAR is the start of a two-char comment start sequence.\n\
- 2 means CHAR is the second character of such a sequence.\n\
- 3 means CHAR is the start of a two-char comment end sequence.\n\
- 4 means CHAR is the second character of such a sequence.\n\
-\n\
-There can be up to two orthogonal comment sequences. This is to support\n\
-language modes such as C++. By default, all comment sequences are of style\n\
-a, but you can set the comment sequence style to b (on the second character\n\
-of a comment-start, or the first character of a comment-end sequence) using\n\
-this flag:\n\
- b means CHAR is part of comment sequence b.\n\
-\n\
- p means CHAR is a prefix character for `backward-prefix-chars';\n\
- such characters are treated as whitespace when they occur\n\
- between expressions.")
- (char, s, table)
-*/
-
-DEFUN ("modify-syntax-entry", Fmodify_syntax_entry, Smodify_syntax_entry, 2, 3,
- /* I really don't know why this is interactive
- help-form should at least be made useful whilst reading the second arg
- */
- "cSet syntax for character: \nsSet syntax for %s to: ",
- 0 /* See immediately above */)
- (c, newentry, syntax_table)
- Lisp_Object c, newentry, syntax_table;
+DEFUN ("string-to-syntax", Fstring_to_syntax, Sstring_to_syntax, 1, 1, 0,
+ doc: /* Convert a syntax specification STRING into syntax cell form.
+STRING should be a string as it is allowed as argument of
+`modify-syntax-entry'. Value is the equivalent cons cell
+(CODE . MATCHING-CHAR) that can be used as value of a `syntax-table'
+text property. */)
+ (string)
+ Lisp_Object string;
{
register unsigned char *p;
register enum syntaxcode code;
int val;
Lisp_Object match;
- CHECK_NUMBER (c, 0);
- CHECK_STRING (newentry, 1);
-
- if (NILP (syntax_table))
- syntax_table = current_buffer->syntax_table;
- else
- check_syntax_table (syntax_table);
+ CHECK_STRING (string);
- p = XSTRING (newentry)->data;
+ p = XSTRING (string)->data;
code = (enum syntaxcode) syntax_spec_code[*p++];
if (((int) code & 0377) == 0377)
- error ("invalid syntax description letter: %c", c);
+ error ("invalid syntax description letter: %c", p[-1]);
if (code == Sinherit)
- {
- SET_RAW_SYNTAX_ENTRY (syntax_table, c, Qnil);
- return Qnil;
- }
+ return Qnil;
if (*p)
{
int len;
- int character = STRING_CHAR_AND_LENGTH (p, XSTRING (newentry)->size - 1,
- len);
+ int character = (STRING_CHAR_AND_LENGTH
+ (p, STRING_BYTES (XSTRING (string)) - 1, len));
XSETINT (match, character);
if (XFASTINT (match) == ' ')
match = Qnil;
case 'b':
val |= 1 << 21;
break;
+
+ case 'n':
+ val |= 1 << 22;
+ break;
}
if (val < XVECTOR (Vsyntax_code_object)->size && NILP (match))
- newentry = XVECTOR (Vsyntax_code_object)->contents[val];
+ return XVECTOR (Vsyntax_code_object)->contents[val];
else
/* Since we can't use a shared object, let's make a new one. */
- newentry = Fcons (make_number (val), match);
-
- SET_RAW_SYNTAX_ENTRY (syntax_table, c, newentry);
+ return Fcons (make_number (val), match);
+}
+/* I really don't know why this is interactive
+ help-form should at least be made useful whilst reading the second arg. */
+DEFUN ("modify-syntax-entry", Fmodify_syntax_entry, Smodify_syntax_entry, 2, 3,
+ "cSet syntax for character: \nsSet syntax for %s to: ",
+ doc: /* Set syntax for character CHAR according to string NEWENTRY.
+The syntax is changed only for table SYNTAX_TABLE, which defaults to
+ the current buffer's syntax table.
+The first character of NEWENTRY should be one of the following:
+ Space or - whitespace syntax. w word constituent.
+ _ symbol constituent. . punctuation.
+ ( open-parenthesis. ) close-parenthesis.
+ " string quote. \\ escape.
+ $ paired delimiter. ' expression quote or prefix operator.
+ < comment starter. > comment ender.
+ / character-quote. @ inherit from `standard-syntax-table'.
+ | generic string fence. ! generic comment fence.
+
+Only single-character comment start and end sequences are represented thus.
+Two-character sequences are represented as described below.
+The second character of NEWENTRY is the matching parenthesis,
+ used only if the first character is `(' or `)'.
+Any additional characters are flags.
+Defined flags are the characters 1, 2, 3, 4, b, p, and n.
+ 1 means CHAR is the start of a two-char comment start sequence.
+ 2 means CHAR is the second character of such a sequence.
+ 3 means CHAR is the start of a two-char comment end sequence.
+ 4 means CHAR is the second character of such a sequence.
+
+There can be up to two orthogonal comment sequences. This is to support
+language modes such as C++. By default, all comment sequences are of style
+a, but you can set the comment sequence style to b (on the second character
+of a comment-start, or the first character of a comment-end sequence) using
+this flag:
+ b means CHAR is part of comment sequence b.
+ n means CHAR is part of a nestable comment sequence.
+
+ p means CHAR is a prefix character for `backward-prefix-chars';
+ such characters are treated as whitespace when they occur
+ between expressions.
+usage: (modify-syntax-entry CHAR NEWENTRY &optional SYNTAX-TABLE) */)
+ (c, newentry, syntax_table)
+ Lisp_Object c, newentry, syntax_table;
+{
+ CHECK_NUMBER (c);
+
+ if (NILP (syntax_table))
+ syntax_table = current_buffer->syntax_table;
+ else
+ check_syntax_table (syntax_table);
+
+ SET_RAW_SYNTAX_ENTRY (syntax_table, XINT (c), Fstring_to_syntax (newentry));
return Qnil;
}
\f
/* Dump syntax table to buffer in human-readable format */
-static void
-describe_syntax (value)
- Lisp_Object value;
+DEFUN ("internal-describe-syntax-value", Finternal_describe_syntax_value,
+ Sinternal_describe_syntax_value, 1, 1, 0,
+ doc: /* Insert a description of the internal syntax description SYNTAX at point. */)
+ (syntax)
+ Lisp_Object syntax;
{
register enum syntaxcode code;
- char desc, match, start1, start2, end1, end2, prefix, comstyle;
+ char desc, start1, start2, end1, end2, prefix, comstyle, comnested;
char str[2];
- Lisp_Object first, match_lisp;
-
- Findent_to (make_number (16), make_number (1));
+ Lisp_Object first, match_lisp, value = syntax;
if (NILP (value))
{
- insert_string ("default\n");
- return;
+ insert_string ("default");
+ return syntax;
}
if (CHAR_TABLE_P (value))
{
- insert_string ("deeper char-table ...\n");
- return;
+ insert_string ("deeper char-table ...");
+ return syntax;
}
if (!CONSP (value))
{
- insert_string ("invalid\n");
- return;
+ insert_string ("invalid");
+ return syntax;
}
- first = XCONS (value)->car;
- match_lisp = XCONS (value)->cdr;
+ first = XCAR (value);
+ match_lisp = XCDR (value);
if (!INTEGERP (first) || !(NILP (match_lisp) || INTEGERP (match_lisp)))
{
- insert_string ("invalid\n");
- return;
+ insert_string ("invalid");
+ return syntax;
}
- code = (enum syntaxcode) (first & 0377);
+ code = (enum syntaxcode) (XINT (first) & 0377);
start1 = (XINT (first) >> 16) & 1;
start2 = (XINT (first) >> 17) & 1;
end1 = (XINT (first) >> 18) & 1;
end2 = (XINT (first) >> 19) & 1;
prefix = (XINT (first) >> 20) & 1;
comstyle = (XINT (first) >> 21) & 1;
+ comnested = (XINT (first) >> 22) & 1;
if ((int) code < 0 || (int) code >= (int) Smax)
{
insert_string ("invalid");
- return;
+ return syntax;
}
desc = syntax_code_spec[(int) code];
insert ("p", 1);
if (comstyle)
insert ("b", 1);
+ if (comnested)
+ insert ("n", 1);
insert_string ("\twhich means: ");
case Sclose:
insert_string ("close"); break;
case Squote:
- insert_string ("quote"); break;
+ insert_string ("prefix"); break;
case Sstring:
insert_string ("string"); break;
case Smath:
insert_string ("comment"); break;
case Sendcomment:
insert_string ("endcomment"); break;
+ case Sinherit:
+ insert_string ("inherit"); break;
+ case Scomment_fence:
+ insert_string ("comment fence"); break;
+ case Sstring_fence:
+ insert_string ("string fence"); break;
default:
insert_string ("invalid");
- return;
+ return syntax;
}
if (!NILP (match_lisp))
insert_string (",\n\t is the second character of a comment-end sequence");
if (comstyle)
insert_string (" (comment style b)");
+ if (comnested)
+ insert_string (" (nestable)");
if (prefix)
insert_string (",\n\t is a prefix character for `backward-prefix-chars'");
+ return syntax;
+}
+
+
+static void
+describe_syntax (value)
+ Lisp_Object value;
+{
+ Findent_to (make_number (16), make_number (1));
+ Finternal_describe_syntax_value (value);
insert_string ("\n");
}
+
static Lisp_Object
describe_syntax_1 (vector)
Lisp_Object vector;
{
struct buffer *old = current_buffer;
set_buffer_internal (XBUFFER (Vstandard_output));
- describe_vector (vector, Qnil, describe_syntax, 0, Qnil, Qnil);
+ describe_vector (vector, Qnil, describe_syntax, 0, Qnil, Qnil, (int *) 0, 0);
while (! NILP (XCHAR_TABLE (vector)->parent))
{
vector = XCHAR_TABLE (vector)->parent;
insert_string ("\nThe parent syntax table is:");
- describe_vector (vector, Qnil, describe_syntax, 0, Qnil, Qnil);
+ describe_vector (vector, Qnil, describe_syntax, 0, Qnil, Qnil,
+ (int *) 0, 0);
}
call0 (intern ("help-mode"));
}
DEFUN ("describe-syntax", Fdescribe_syntax, Sdescribe_syntax, 0, 0, "",
- "Describe the syntax specifications in the syntax table.\n\
-The descriptions are inserted in a buffer, which is then displayed.")
- ()
+ doc: /* Describe the syntax specifications in the syntax table.
+The descriptions are inserted in a buffer, which is then displayed. */)
+ ()
{
internal_with_output_to_temp_buffer
("*Help*", describe_syntax_1, current_buffer->syntax_table);
return Qnil;
}
\f
+int parse_sexp_ignore_comments;
+
/* Return the position across COUNT words from FROM.
If that many words cannot be found before the end of the buffer, return 0.
COUNT negative means scan backward and stop at word beginning. */
+int
scan_words (from, count)
register int from, count;
{
register int beg = BEGV;
register int end = ZV;
+ register int from_byte = CHAR_TO_BYTE (from);
register enum syntaxcode code;
int ch0, ch1;
- int temp_pos;
immediate_quit = 1;
QUIT;
+ SETUP_SYNTAX_TABLE (from, count);
+
while (count > 0)
{
while (1)
immediate_quit = 0;
return 0;
}
- ch0 = FETCH_CHAR (from);
+ UPDATE_SYNTAX_TABLE_FORWARD (from);
+ ch0 = FETCH_CHAR (from_byte);
code = SYNTAX (ch0);
- INC_POS (from);
+ INC_BOTH (from, from_byte);
if (words_include_escapes
&& (code == Sescape || code == Scharquote))
break;
while (1)
{
if (from == end) break;
- ch1 = FETCH_CHAR (from);
+ UPDATE_SYNTAX_TABLE_FORWARD (from);
+ ch1 = FETCH_CHAR (from_byte);
code = SYNTAX (ch1);
if (!(words_include_escapes
&& (code == Sescape || code == Scharquote)))
if (code != Sword || WORD_BOUNDARY_P (ch0, ch1))
break;
- INC_POS (from);
+ INC_BOTH (from, from_byte);
ch0 = ch1;
}
count--;
immediate_quit = 0;
return 0;
}
- DEC_POS (from);
- ch1 = FETCH_CHAR (from);
+ DEC_BOTH (from, from_byte);
+ UPDATE_SYNTAX_TABLE_BACKWARD (from);
+ ch1 = FETCH_CHAR (from_byte);
code = SYNTAX (ch1);
if (words_include_escapes
&& (code == Sescape || code == Scharquote))
position of it. */
while (1)
{
- if (from == beg) break;
- temp_pos = from;
- DEC_POS (temp_pos);
- ch0 = FETCH_CHAR (temp_pos);
+ int temp_byte;
+
+ if (from == beg)
+ break;
+ temp_byte = dec_bytepos (from_byte);
+ UPDATE_SYNTAX_TABLE_BACKWARD (from);
+ ch0 = FETCH_CHAR (temp_byte);
code = SYNTAX (ch0);
if (!(words_include_escapes
&& (code == Sescape || code == Scharquote)))
if (code != Sword || WORD_BOUNDARY_P (ch0, ch1))
break;
- from = temp_pos;
+ DEC_BOTH (from, from_byte);
ch1 = ch0;
}
count++;
}
- immediate_quit = 0;
+ immediate_quit = 0;
+
+ return from;
+}
+
+DEFUN ("forward-word", Fforward_word, Sforward_word, 1, 1, "p",
+ doc: /* Move point forward ARG words (backward if ARG is negative).
+Normally returns t.
+If an edge of the buffer or a field boundary is reached, point is left there
+and the function returns nil. Field boundaries are not noticed if
+`inhibit-field-text-motion' is non-nil. */)
+ (count)
+ Lisp_Object count;
+{
+ int orig_val, val;
+ CHECK_NUMBER (count);
+
+ val = orig_val = scan_words (PT, XINT (count));
+ if (! orig_val)
+ val = XINT (count) > 0 ? ZV : BEGV;
+
+ /* Avoid jumping out of an input field. */
+ val = XFASTINT (Fconstrain_to_field (make_number (val), make_number (PT),
+ Qt, Qnil, Qnil));
+
+ SET_PT (val);
+ return val == orig_val ? Qt : Qnil;
+}
+\f
+Lisp_Object skip_chars ();
+
+DEFUN ("skip-chars-forward", Fskip_chars_forward, Sskip_chars_forward, 1, 2, 0,
+ doc: /* Move point forward, stopping before a char not in STRING, or at pos LIM.
+STRING is like the inside of a `[...]' in a regular expression
+except that `]' is never special and `\\' quotes `^', `-' or `\\'
+ (but not as the end of a range; quoting is never needed there).
+Thus, with arg "a-zA-Z", this skips letters stopping before first nonletter.
+With arg "^a-zA-Z", skips nonletters stopping before first letter.
+Returns the distance traveled, either zero or positive. */)
+ (string, lim)
+ Lisp_Object string, lim;
+{
+ return skip_chars (1, 0, string, lim);
+}
+
+DEFUN ("skip-chars-backward", Fskip_chars_backward, Sskip_chars_backward, 1, 2, 0,
+ doc: /* Move point backward, stopping after a char not in STRING, or at pos LIM.
+See `skip-chars-forward' for details.
+Returns the distance traveled, either zero or negative. */)
+ (string, lim)
+ Lisp_Object string, lim;
+{
+ return skip_chars (0, 0, string, lim);
+}
+
+DEFUN ("skip-syntax-forward", Fskip_syntax_forward, Sskip_syntax_forward, 1, 2, 0,
+ doc: /* Move point forward across chars in specified syntax classes.
+SYNTAX is a string of syntax code characters.
+Stop before a char whose syntax is not in SYNTAX, or at position LIM.
+If SYNTAX starts with ^, skip characters whose syntax is NOT in SYNTAX.
+This function returns the distance traveled, either zero or positive. */)
+ (syntax, lim)
+ Lisp_Object syntax, lim;
+{
+ return skip_chars (1, 1, syntax, lim);
+}
+
+DEFUN ("skip-syntax-backward", Fskip_syntax_backward, Sskip_syntax_backward, 1, 2, 0,
+ doc: /* Move point backward across chars in specified syntax classes.
+SYNTAX is a string of syntax code characters.
+Stop on reaching a char whose syntax is not in SYNTAX, or at position LIM.
+If SYNTAX starts with ^, skip characters whose syntax is NOT in SYNTAX.
+This function returns the distance traveled, either zero or negative. */)
+ (syntax, lim)
+ Lisp_Object syntax, lim;
+{
+ return skip_chars (0, 1, syntax, lim);
+}
+
+static Lisp_Object
+skip_chars (forwardp, syntaxp, string, lim)
+ int forwardp, syntaxp;
+ Lisp_Object string, lim;
+{
+ register unsigned int c;
+ unsigned char fastmap[0400];
+ /* If SYNTAXP is 0, STRING may contain multi-byte form of characters
+ of which codes don't fit in FASTMAP. In that case, set the
+ ranges of characters in CHAR_RANGES. */
+ int *char_ranges;
+ int n_char_ranges = 0;
+ int negate = 0;
+ register int i, i_byte;
+ int multibyte = !NILP (current_buffer->enable_multibyte_characters);
+ int string_multibyte;
+ int size_byte;
+ unsigned char *str;
+ int len;
+
+ CHECK_STRING (string);
+ char_ranges = (int *) alloca (XSTRING (string)->size * (sizeof (int)) * 2);
+ string_multibyte = STRING_MULTIBYTE (string);
+ str = XSTRING (string)->data;
+ size_byte = STRING_BYTES (XSTRING (string));
+
+ /* Adjust the multibyteness of the string to that of the buffer. */
+ if (multibyte != string_multibyte)
+ {
+ int nbytes;
+
+ if (multibyte)
+ nbytes = count_size_as_multibyte (XSTRING (string)->data,
+ XSTRING (string)->size);
+ else
+ nbytes = XSTRING (string)->size;
+ if (nbytes != size_byte)
+ {
+ str = (unsigned char *) alloca (nbytes);
+ copy_text (XSTRING (string)->data, str, size_byte,
+ string_multibyte, multibyte);
+ size_byte = nbytes;
+ }
+ }
+
+ if (NILP (lim))
+ XSETINT (lim, forwardp ? ZV : BEGV);
+ else
+ CHECK_NUMBER_COERCE_MARKER (lim);
+
+ /* In any case, don't allow scan outside bounds of buffer. */
+ if (XINT (lim) > ZV)
+ XSETFASTINT (lim, ZV);
+ if (XINT (lim) < BEGV)
+ XSETFASTINT (lim, BEGV);
+
+ bzero (fastmap, sizeof fastmap);
+
+ i_byte = 0;
+
+ if (i_byte < size_byte
+ && XSTRING (string)->data[0] == '^')
+ {
+ negate = 1; i_byte++;
+ }
+
+ /* Find the characters specified and set their elements of fastmap.
+ If syntaxp, each character counts as itself.
+ Otherwise, handle backslashes and ranges specially. */
+
+ while (i_byte < size_byte)
+ {
+ c = STRING_CHAR_AND_LENGTH (str + i_byte, size_byte - i_byte, len);
+ i_byte += len;
+
+ if (syntaxp)
+ fastmap[syntax_spec_code[c & 0377]] = 1;
+ else
+ {
+ if (c == '\\')
+ {
+ if (i_byte == size_byte)
+ break;
+
+ c = STRING_CHAR_AND_LENGTH (str+i_byte, size_byte-i_byte, len);
+ i_byte += len;
+ }
+ if (i_byte < size_byte
+ && str[i_byte] == '-')
+ {
+ unsigned int c2;
+
+ /* Skip over the dash. */
+ i_byte++;
+
+ if (i_byte == size_byte)
+ break;
+
+ /* Get the end of the range. */
+ c2 =STRING_CHAR_AND_LENGTH (str+i_byte, size_byte-i_byte, len);
+ i_byte += len;
+
+ if (SINGLE_BYTE_CHAR_P (c))
+ {
+ if (! SINGLE_BYTE_CHAR_P (c2))
+ {
+ /* Handle a range starting with a character of
+ less than 256, and ending with a character of
+ not less than 256. Split that into two
+ ranges, the low one ending at 0377, and the
+ high one starting at the smallest character
+ in the charset of C2 and ending at C2. */
+ int charset = CHAR_CHARSET (c2);
+ int c1 = MAKE_CHAR (charset, 0, 0);
+
+ char_ranges[n_char_ranges++] = c1;
+ char_ranges[n_char_ranges++] = c2;
+ c2 = 0377;
+ }
+ while (c <= c2)
+ {
+ fastmap[c] = 1;
+ c++;
+ }
+ }
+ else if (c <= c2) /* Both C and C2 are multibyte char. */
+ {
+ char_ranges[n_char_ranges++] = c;
+ char_ranges[n_char_ranges++] = c2;
+ }
+ }
+ else
+ {
+ if (SINGLE_BYTE_CHAR_P (c))
+ fastmap[c] = 1;
+ else
+ {
+ char_ranges[n_char_ranges++] = c;
+ char_ranges[n_char_ranges++] = c;
+ }
+ }
+ }
+ }
+
+ /* If ^ was the first character, complement the fastmap. */
+ if (negate)
+ for (i = 0; i < sizeof fastmap; i++)
+ fastmap[i] ^= 1;
+
+ {
+ int start_point = PT;
+ int pos = PT;
+ int pos_byte = PT_BYTE;
+
+ immediate_quit = 1;
+ if (syntaxp)
+ {
+ SETUP_SYNTAX_TABLE (pos, forwardp ? 1 : -1);
+ if (forwardp)
+ {
+ if (multibyte)
+ {
+ if (pos < XINT (lim))
+ while (fastmap[(int) SYNTAX (FETCH_CHAR (pos_byte))])
+ {
+ /* Since we already checked for multibyteness,
+ avoid using INC_BOTH which checks again. */
+ INC_POS (pos_byte);
+ pos++;
+ if (pos >= XINT (lim))
+ break;
+ UPDATE_SYNTAX_TABLE_FORWARD (pos);
+ }
+ }
+ else
+ {
+ while (pos < XINT (lim)
+ && fastmap[(int) SYNTAX (FETCH_BYTE (pos))])
+ {
+ pos++;
+ UPDATE_SYNTAX_TABLE_FORWARD (pos);
+ }
+ }
+ }
+ else
+ {
+ if (multibyte)
+ {
+ while (pos > XINT (lim))
+ {
+ int savepos = pos_byte;
+ /* Since we already checked for multibyteness,
+ avoid using DEC_BOTH which checks again. */
+ pos--;
+ DEC_POS (pos_byte);
+ UPDATE_SYNTAX_TABLE_BACKWARD (pos);
+ if (!fastmap[(int) SYNTAX (FETCH_CHAR (pos_byte))])
+ {
+ pos++;
+ pos_byte = savepos;
+ break;
+ }
+ }
+ }
+ else
+ {
+ if (pos > XINT (lim))
+ while (fastmap[(int) SYNTAX (FETCH_BYTE (pos - 1))])
+ {
+ pos--;
+ if (pos <= XINT (lim))
+ break;
+ UPDATE_SYNTAX_TABLE_BACKWARD (pos - 1);
+ }
+ }
+ }
+ }
+ else
+ {
+ if (forwardp)
+ {
+ if (multibyte)
+ while (pos < XINT (lim))
+ {
+ c = FETCH_MULTIBYTE_CHAR (pos_byte);
+ if (SINGLE_BYTE_CHAR_P (c))
+ {
+ if (!fastmap[c])
+ break;
+ }
+ else
+ {
+ /* If we are looking at a multibyte character,
+ we must look up the character in the table
+ CHAR_RANGES. If there's no data in the
+ table, that character is not what we want to
+ skip. */
+
+ /* The following code do the right thing even if
+ n_char_ranges is zero (i.e. no data in
+ CHAR_RANGES). */
+ for (i = 0; i < n_char_ranges; i += 2)
+ if (c >= char_ranges[i] && c <= char_ranges[i + 1])
+ break;
+ if (!(negate ^ (i < n_char_ranges)))
+ break;
+ }
+ INC_BOTH (pos, pos_byte);
+ }
+ else
+ while (pos < XINT (lim) && fastmap[FETCH_BYTE (pos)])
+ pos++;
+ }
+ else
+ {
+ if (multibyte)
+ while (pos > XINT (lim))
+ {
+ int prev_pos_byte = pos_byte;
+
+ DEC_POS (prev_pos_byte);
+ c = FETCH_MULTIBYTE_CHAR (prev_pos_byte);
+ if (SINGLE_BYTE_CHAR_P (c))
+ {
+ if (!fastmap[c])
+ break;
+ }
+ else
+ {
+ /* See the comment in the previous similar code. */
+ for (i = 0; i < n_char_ranges; i += 2)
+ if (c >= char_ranges[i] && c <= char_ranges[i + 1])
+ break;
+ if (!(negate ^ (i < n_char_ranges)))
+ break;
+ }
+ pos--;
+ pos_byte = prev_pos_byte;
+ }
+ else
+ while (pos > XINT (lim) && fastmap[FETCH_BYTE (pos - 1)])
+ pos--;
+ }
+ }
+
+#if 0 /* Not needed now that a position in mid-character
+ cannot be specified in Lisp. */
+ if (multibyte
+ /* INC_POS or DEC_POS might have moved POS over LIM. */
+ && (forwardp ? (pos > XINT (lim)) : (pos < XINT (lim))))
+ pos = XINT (lim);
+#endif
- return from;
+ if (! multibyte)
+ pos_byte = pos;
+
+ SET_PT_BOTH (pos, pos_byte);
+ immediate_quit = 0;
+
+ return make_number (PT - start_point);
+ }
}
+\f
+/* Jump over a comment, assuming we are at the beginning of one.
+ FROM is the current position.
+ FROM_BYTE is the bytepos corresponding to FROM.
+ Do not move past STOP (a charpos).
+ The comment over which we have to jump is of style STYLE
+ (either SYNTAX_COMMENT_STYLE(foo) or ST_COMMENT_STYLE).
+ NESTING should be positive to indicate the nesting at the beginning
+ for nested comments and should be zero or negative else.
+ ST_COMMENT_STYLE cannot be nested.
+ PREV_SYNTAX is the SYNTAX_WITH_FLAGS of the previous character
+ (or 0 If the search cannot start in the middle of a two-character).
+
+ If successful, return 1 and store the charpos of the comment's end
+ into *CHARPOS_PTR and the corresponding bytepos into *BYTEPOS_PTR.
+ Else, return 0 and store the charpos STOP into *CHARPOS_PTR, the
+ corresponding bytepos into *BYTEPOS_PTR and the current nesting
+ (as defined for state.incomment) in *INCOMMENT_PTR.
+
+ The comment end is the last character of the comment rather than the
+ character just after the comment.
+
+ Global syntax data is assumed to initially be valid for FROM and
+ remains valid for forward search starting at the returned position. */
-DEFUN ("forward-word", Fforward_word, Sforward_word, 1, 1, "p",
- "Move point forward ARG words (backward if ARG is negative).\n\
-Normally returns t.\n\
-If an edge of the buffer is reached, point is left there\n\
-and nil is returned.")
- (count)
- Lisp_Object count;
+static int
+forw_comment (from, from_byte, stop, nesting, style, prev_syntax,
+ charpos_ptr, bytepos_ptr, incomment_ptr)
+ int from, from_byte, stop;
+ int nesting, style, prev_syntax;
+ int *charpos_ptr, *bytepos_ptr, *incomment_ptr;
{
- int val;
- CHECK_NUMBER (count, 0);
+ register int c, c1;
+ register enum syntaxcode code;
+ register int syntax;
+
+ if (nesting <= 0) nesting = -1;
- if (!(val = scan_words (PT, XINT (count))))
+ /* Enter the loop in the middle so that we find
+ a 2-char comment ender if we start in the middle of it. */
+ syntax = prev_syntax;
+ if (syntax != 0) goto forw_incomment;
+
+ while (1)
{
- SET_PT (XINT (count) > 0 ? ZV : BEGV);
- return Qnil;
+ if (from == stop)
+ {
+ *incomment_ptr = nesting;
+ *charpos_ptr = from;
+ *bytepos_ptr = from_byte;
+ return 0;
+ }
+ c = FETCH_CHAR (from_byte);
+ syntax = SYNTAX_WITH_FLAGS (c);
+ code = syntax & 0xff;
+ if (code == Sendcomment
+ && SYNTAX_FLAGS_COMMENT_STYLE (syntax) == style
+ && (SYNTAX_FLAGS_COMMENT_NESTED (syntax) ?
+ (nesting > 0 && --nesting == 0) : nesting < 0))
+ /* we have encountered a comment end of the same style
+ as the comment sequence which began this comment
+ section */
+ break;
+ if (code == Scomment_fence
+ && style == ST_COMMENT_STYLE)
+ /* we have encountered a comment end of the same style
+ as the comment sequence which began this comment
+ section. */
+ break;
+ if (nesting > 0
+ && code == Scomment
+ && SYNTAX_FLAGS_COMMENT_NESTED (syntax)
+ && SYNTAX_FLAGS_COMMENT_STYLE (syntax) == style)
+ /* we have encountered a nested comment of the same style
+ as the comment sequence which began this comment section */
+ nesting++;
+ INC_BOTH (from, from_byte);
+ UPDATE_SYNTAX_TABLE_FORWARD (from);
+
+ forw_incomment:
+ if (from < stop && SYNTAX_FLAGS_COMEND_FIRST (syntax)
+ && SYNTAX_FLAGS_COMMENT_STYLE (syntax) == style
+ && (c1 = FETCH_CHAR (from_byte),
+ SYNTAX_COMEND_SECOND (c1))
+ && ((SYNTAX_FLAGS_COMMENT_NESTED (syntax) ||
+ SYNTAX_COMMENT_NESTED (c1)) ? nesting > 0 : nesting < 0))
+ {
+ if (--nesting <= 0)
+ /* we have encountered a comment end of the same style
+ as the comment sequence which began this comment
+ section */
+ break;
+ else
+ {
+ INC_BOTH (from, from_byte);
+ UPDATE_SYNTAX_TABLE_FORWARD (from);
+ }
+ }
+ if (nesting > 0
+ && from < stop
+ && SYNTAX_FLAGS_COMSTART_FIRST (syntax)
+ && (c1 = FETCH_CHAR (from_byte),
+ SYNTAX_COMMENT_STYLE (c1) == style
+ && SYNTAX_COMSTART_SECOND (c1))
+ && (SYNTAX_FLAGS_COMMENT_NESTED (syntax) ||
+ SYNTAX_COMMENT_NESTED (c1)))
+ /* we have encountered a nested comment of the same style
+ as the comment sequence which began this comment
+ section */
+ {
+ INC_BOTH (from, from_byte);
+ UPDATE_SYNTAX_TABLE_FORWARD (from);
+ nesting++;
+ }
}
- SET_PT (val);
- return Qt;
+ *charpos_ptr = from;
+ *bytepos_ptr = from_byte;
+ return 1;
}
-\f
+
DEFUN ("forward-comment", Fforward_comment, Sforward_comment, 1, 1, 0,
- "Move forward across up to N comments. If N is negative, move backward.\n\
-Stop scanning if we find something other than a comment or whitespace.\n\
-Set point to where scanning stops.\n\
-If N comments are found as expected, with nothing except whitespace\n\
-between them, return t; otherwise return nil.")
- (count)
+ doc: /* Move forward across up to N comments. If N is negative, move backward.
+Stop scanning if we find something other than a comment or whitespace.
+Set point to where scanning stops.
+If N comments are found as expected, with nothing except whitespace
+between them, return t; otherwise return nil. */)
+ (count)
Lisp_Object count;
{
register int from;
+ int from_byte;
register int stop;
register int c, c1;
register enum syntaxcode code;
int comstyle = 0; /* style of comment encountered */
+ int comnested = 0; /* whether the comment is nestable or not */
int found;
int count1;
- int temp_pos;
+ int out_charpos, out_bytepos;
+ int dummy;
- CHECK_NUMBER (count, 0);
+ CHECK_NUMBER (count);
count1 = XINT (count);
+ stop = count1 > 0 ? ZV : BEGV;
immediate_quit = 1;
QUIT;
from = PT;
+ from_byte = PT_BYTE;
+ SETUP_SYNTAX_TABLE (from, count1);
while (count1 > 0)
{
- stop = ZV;
do
{
+ int comstart_first;
+
if (from == stop)
{
- SET_PT (from);
+ SET_PT_BOTH (from, from_byte);
immediate_quit = 0;
return Qnil;
}
- c = FETCH_CHAR (from);
+ c = FETCH_CHAR (from_byte);
code = SYNTAX (c);
- INC_POS (from);
- comstyle = 0;
- if (from < stop && SYNTAX_COMSTART_FIRST (c)
- && (c1 = FETCH_CHAR (from),
+ comstart_first = SYNTAX_COMSTART_FIRST (c);
+ comnested = SYNTAX_COMMENT_NESTED (c);
+ comstyle = SYNTAX_COMMENT_STYLE (c);
+ INC_BOTH (from, from_byte);
+ UPDATE_SYNTAX_TABLE_FORWARD (from);
+ if (from < stop && comstart_first
+ && (c1 = FETCH_CHAR (from_byte),
SYNTAX_COMSTART_SECOND (c1)))
{
/* We have encountered a comment start sequence and we
the comment section. */
code = Scomment;
comstyle = SYNTAX_COMMENT_STYLE (c1);
- INC_POS (from);
+ comnested = comnested || SYNTAX_COMMENT_NESTED (c1);
+ INC_BOTH (from, from_byte);
+ UPDATE_SYNTAX_TABLE_FORWARD (from);
}
}
- while (code == Swhitespace || code == Sendcomment);
- if (code != Scomment)
+ while (code == Swhitespace || (code == Sendcomment && c == '\n'));
+
+ if (code == Scomment_fence)
+ comstyle = ST_COMMENT_STYLE;
+ else if (code != Scomment)
{
immediate_quit = 0;
- DEC_POS (from);
- SET_PT (from);
+ DEC_BOTH (from, from_byte);
+ SET_PT_BOTH (from, from_byte);
return Qnil;
}
/* We're at the start of a comment. */
- while (1)
+ found = forw_comment (from, from_byte, stop, comnested, comstyle, 0,
+ &out_charpos, &out_bytepos, &dummy);
+ from = out_charpos; from_byte = out_bytepos;
+ if (!found)
{
- if (from == stop)
- {
- immediate_quit = 0;
- SET_PT (from);
- return Qnil;
- }
- c = FETCH_CHAR (from);
- INC_POS (from);
- if (SYNTAX (c) == Sendcomment
- && SYNTAX_COMMENT_STYLE (c) == comstyle)
- /* we have encountered a comment end of the same style
- as the comment sequence which began this comment
- section */
- break;
- if (from < stop && SYNTAX_COMEND_FIRST (c)
- && (c1 = FETCH_CHAR (from),
- SYNTAX_COMEND_SECOND (c1))
- && SYNTAX_COMMENT_STYLE (c) == comstyle)
- /* we have encountered a comment end of the same style
- as the comment sequence which began this comment
- section */
- { INC_POS (from); break; }
+ immediate_quit = 0;
+ SET_PT_BOTH (from, from_byte);
+ return Qnil;
}
+ INC_BOTH (from, from_byte);
+ UPDATE_SYNTAX_TABLE_FORWARD (from);
/* We have skipped one comment. */
count1--;
}
while (count1 < 0)
{
- stop = BEGV;
- while (from > stop)
+ while (1)
{
int quoted;
- DEC_POS (from);
- quoted = char_quoted (from);
- if (quoted)
- DEC_POS (from);
- c = FETCH_CHAR (from);
+ if (from <= stop)
+ {
+ SET_PT_BOTH (BEGV, BEGV_BYTE);
+ immediate_quit = 0;
+ return Qnil;
+ }
+
+ DEC_BOTH (from, from_byte);
+ /* char_quoted does UPDATE_SYNTAX_TABLE_BACKWARD (from). */
+ quoted = char_quoted (from, from_byte);
+ c = FETCH_CHAR (from_byte);
code = SYNTAX (c);
comstyle = 0;
+ comnested = SYNTAX_COMMENT_NESTED (c);
if (code == Sendcomment)
comstyle = SYNTAX_COMMENT_STYLE (c);
- temp_pos = from;
- DEC_POS (temp_pos);
if (from > stop && SYNTAX_COMEND_SECOND (c)
- && (c1 = FETCH_CHAR (temp_pos),
- SYNTAX_COMEND_FIRST (c1))
- && !char_quoted (temp_pos))
+ && prev_char_comend_first (from, from_byte)
+ && !char_quoted (from - 1, dec_bytepos (from_byte)))
{
/* We must record the comment style encountered so that
later, we can match only the proper comment begin
sequence of the same style. */
+ DEC_BOTH (from, from_byte);
code = Sendcomment;
+ /* Calling char_quoted, above, set up global syntax position
+ at the new value of FROM. */
+ c1 = FETCH_CHAR (from_byte);
comstyle = SYNTAX_COMMENT_STYLE (c1);
- from = temp_pos;
+ comnested = comnested || SYNTAX_COMMENT_NESTED (c1);
}
- if (code == Sendcomment && !quoted)
+ if (code == Scomment_fence)
{
-#if 0
- if (code != SYNTAX (c))
- /* For a two-char comment ender, we can assume
- it does end a comment. So scan back in a simple way. */
+ /* Skip until first preceding unquoted comment_fence. */
+ int found = 0, ini = from, ini_byte = from_byte;
+
+ while (1)
{
- if (from != stop) DEC_POS (from);
- while (1)
+ DEC_BOTH (from, from_byte);
+ if (from == stop)
+ break;
+ UPDATE_SYNTAX_TABLE_BACKWARD (from);
+ c = FETCH_CHAR (from_byte);
+ if (SYNTAX (c) == Scomment_fence
+ && !char_quoted (from, from_byte))
{
- if ((c = FETCH_CHAR (from),
- SYNTAX (c) == Scomment)
- && SYNTAX_COMMENT_STYLE (c) == comstyle)
- break;
- if (from == stop)
- {
- immediate_quit = 0;
- SET_PT (from);
- return Qnil;
- }
- DEC_POS (from);
- if (SYNTAX_COMSTART_SECOND (c)
- && (c1 = FETCH_CHAR (from),
- SYNTAX_COMSTART_FIRST (c1))
- && SYNTAX_COMMENT_STYLE (c) == comstyle
- && !char_quoted (from))
- break;
+ found = 1;
+ break;
+ }
+ }
+ if (found == 0)
+ {
+ from = ini; /* Set point to ini + 1. */
+ from_byte = ini_byte;
+ goto leave;
+ }
+ }
+ else if (code == Sendcomment)
+ {
+ found = back_comment (from, from_byte, stop, comnested, comstyle,
+ &out_charpos, &out_bytepos);
+ if (found == -1)
+ {
+ if (c == '\n')
+ /* This end-of-line is not an end-of-comment.
+ Treat it like a whitespace.
+ CC-mode (and maybe others) relies on this behavior. */
+ ;
+ else
+ {
+ /* Failure: we should go back to the end of this
+ not-quite-endcomment. */
+ if (SYNTAX(c) != code)
+ /* It was a two-char Sendcomment. */
+ INC_BOTH (from, from_byte);
+ goto leave;
}
+ }
+ else
+ {
+ /* We have skipped one comment. */
+ from = out_charpos, from_byte = out_bytepos;
break;
}
-#endif /* 0 */
-
- /* Look back, counting the parity of string-quotes,
- and recording the comment-starters seen.
- When we reach a safe place, assume that's not in a string;
- then step the main scan to the earliest comment-starter seen
- an even number of string quotes away from the safe place.
-
- OFROM[I] is position of the earliest comment-starter seen
- which is I+2X quotes from the comment-end.
- PARITY is current parity of quotes from the comment end. */
- {
- int parity = 0;
- char my_stringend = 0;
- int string_lossage = 0;
- int comment_end = from;
- int comstart_pos = 0;
- int comstart_parity = 0;
- int scanstart = from;
-
- DEC_POS (scanstart);
- /* At beginning of range to scan, we're outside of strings;
- that determines quote parity to the comment-end. */
- while (from != stop)
- {
- /* Move back and examine a character. */
- DEC_POS (from);
-
- c = FETCH_CHAR (from);
- code = SYNTAX (c);
-
- /* If this char is the second of a 2-char comment sequence,
- back up and give the pair the appropriate syntax. */
- temp_pos = from;
- DEC_POS (temp_pos);
- if (from > stop && SYNTAX_COMEND_SECOND (c)
- && (c1 = FETCH_CHAR (temp_pos),
- SYNTAX_COMEND_FIRST (c1)))
- {
- code = Sendcomment;
- from = temp_pos;
- c = c1;
- }
-
- temp_pos = from;
- INC_POS (temp_pos);
- /* If this char starts a 2-char comment start sequence,
- treat it like a 1-char comment starter. */
- if (from < scanstart && SYNTAX_COMSTART_FIRST (c)
- && (c1 = FETCH_CHAR (temp_pos),
- SYNTAX_COMSTART_SECOND (c1))
- && comstyle == SYNTAX_COMMENT_STYLE (c1))
- code = Scomment;
-
- /* Ignore escaped characters. */
- if (char_quoted (from))
- continue;
-
- /* Track parity of quotes. */
- if (code == Sstring)
- {
- parity ^= 1;
- if (my_stringend == 0)
- my_stringend = c;
- /* If we have two kinds of string delimiters.
- There's no way to grok this scanning backwards. */
- else if (my_stringend != c)
- string_lossage = 1;
- }
-
- /* Record comment-starters according to that
- quote-parity to the comment-end. */
- if (code == Scomment)
- {
- comstart_parity = parity;
- comstart_pos = from;
- }
-
- /* If we find another earlier comment-ender,
- any comment-starts earlier than that don't count
- (because they go with the earlier comment-ender). */
- if (code == Sendcomment
- && SYNTAX_COMMENT_STYLE (FETCH_CHAR (from)) == comstyle)
- break;
-
- /* Assume a defun-start point is outside of strings. */
- if (code == Sopen
- && (from == stop || FETCH_BYTE (from - 1) == '\n'))
- break;
- }
-
- if (comstart_pos == 0)
- from = comment_end;
- /* If the earliest comment starter
- is followed by uniform paired string quotes or none,
- we know it can't be inside a string
- since if it were then the comment ender would be inside one.
- So it does start a comment. Skip back to it. */
- else if (comstart_parity == 0 && !string_lossage)
- from = comstart_pos;
- else
- {
- /* We had two kinds of string delimiters mixed up
- together. Decode this going forwards.
- Scan fwd from the previous comment ender
- to the one in question; this records where we
- last passed a comment starter. */
- struct lisp_parse_state state;
- scan_sexps_forward (&state, find_defun_start (comment_end),
- comment_end - 1, -10000, 0, Qnil, 0);
- if (state.incomment)
- from = state.comstart;
- else
- /* We can't grok this as a comment; scan it normally. */
- from = comment_end;
- }
- }
- /* We have skipped one comment. */
- break;
}
- else if ((code != Swhitespace && code != Scomment) || quoted)
+ else if (code != Swhitespace || quoted)
{
+ leave:
immediate_quit = 0;
- INC_POS (from);
- SET_PT (from);
+ INC_BOTH (from, from_byte);
+ SET_PT_BOTH (from, from_byte);
return Qnil;
}
}
count1++;
}
- SET_PT (from);
+ SET_PT_BOTH (from, from_byte);
immediate_quit = 0;
return Qt;
}
\f
-int parse_sexp_ignore_comments;
+/* Return syntax code of character C if C is a single byte character
+ or `multibyte_symbol_p' is zero. Otherwise, return Ssymbol. */
-Lisp_Object
+#define SYNTAX_WITH_MULTIBYTE_CHECK(c) \
+ ((SINGLE_BYTE_CHAR_P (c) || !multibyte_symbol_p) \
+ ? SYNTAX (c) : Ssymbol)
+
+static Lisp_Object
scan_lists (from, count, depth, sexpflag)
register int from;
int count, depth, sexpflag;
{
Lisp_Object val;
- register int stop;
+ register int stop = count > 0 ? ZV : BEGV;
register int c, c1;
int stringterm;
int quoted;
int mathexit = 0;
register enum syntaxcode code, temp_code;
- int min_depth = depth; /* Err out if depth gets less than this. */
+ int min_depth = depth; /* Err out if depth gets less than this. */
int comstyle = 0; /* style of comment encountered */
+ int comnested = 0; /* whether the comment is nestable or not */
int temp_pos;
int last_good = from;
+ int found;
+ int from_byte;
+ int out_bytepos, out_charpos;
+ int temp, dummy;
+ int multibyte_symbol_p = sexpflag && multibyte_syntax_as_symbol;
if (depth > 0) min_depth = 0;
+ if (from > ZV) from = ZV;
+ if (from < BEGV) from = BEGV;
+
+ from_byte = CHAR_TO_BYTE (from);
+
immediate_quit = 1;
QUIT;
+ SETUP_SYNTAX_TABLE (from, count);
while (count > 0)
{
- stop = ZV;
while (from < stop)
{
- c = FETCH_CHAR (from);
- code = SYNTAX (c);
+ int comstart_first, prefix;
+ UPDATE_SYNTAX_TABLE_FORWARD (from);
+ c = FETCH_CHAR (from_byte);
+ code = SYNTAX_WITH_MULTIBYTE_CHECK (c);
+ comstart_first = SYNTAX_COMSTART_FIRST (c);
+ comnested = SYNTAX_COMMENT_NESTED (c);
+ comstyle = SYNTAX_COMMENT_STYLE (c);
+ prefix = SYNTAX_PREFIX (c);
if (depth == min_depth)
last_good = from;
- INC_POS (from);
- if (from < stop && SYNTAX_COMSTART_FIRST (c)
- && SYNTAX_COMSTART_SECOND (FETCH_CHAR (from))
+ INC_BOTH (from, from_byte);
+ UPDATE_SYNTAX_TABLE_FORWARD (from);
+ if (from < stop && comstart_first
+ && SYNTAX_COMSTART_SECOND (FETCH_CHAR (from_byte))
&& parse_sexp_ignore_comments)
{
/* we have encountered a comment start sequence and we
- are ignoring all text inside comments. we must record
+ are ignoring all text inside comments. We must record
the comment style this sequence begins so that later,
only a comment end of the same style actually ends
the comment section */
code = Scomment;
- comstyle = SYNTAX_COMMENT_STYLE (FETCH_CHAR (from));
- INC_POS (from);
+ c1 = FETCH_CHAR (from_byte);
+ comstyle = SYNTAX_COMMENT_STYLE (c1);
+ comnested = comnested || SYNTAX_COMMENT_NESTED (c1);
+ INC_BOTH (from, from_byte);
+ UPDATE_SYNTAX_TABLE_FORWARD (from);
}
- if (SYNTAX_PREFIX (c))
+ if (prefix)
continue;
switch (SWITCH_ENUM_CAST (code))
case Sescape:
case Scharquote:
if (from == stop) goto lose;
- INC_POS (from);
+ INC_BOTH (from, from_byte);
/* treat following character as a word constituent */
case Sword:
case Ssymbol:
if (depth || !sexpflag) break;
- /* This word counts as a sexp; return at end of it. */
+ /* This word counts as a sexp; return at end of it. */
while (from < stop)
{
- switch (SWITCH_ENUM_CAST (SYNTAX (FETCH_CHAR (from))))
+ UPDATE_SYNTAX_TABLE_FORWARD (from);
+
+ /* Some compilers can't handle this inside the switch. */
+ c = FETCH_CHAR (from_byte);
+ temp = SYNTAX_WITH_MULTIBYTE_CHECK (c);
+ switch (temp)
{
case Scharquote:
case Sescape:
- INC_POS (from);
+ INC_BOTH (from, from_byte);
if (from == stop) goto lose;
break;
case Sword:
default:
goto done;
}
- INC_POS (from);
+ INC_BOTH (from, from_byte);
}
goto done;
+ case Scomment_fence:
+ comstyle = ST_COMMENT_STYLE;
+ /* FALLTHROUGH */
case Scomment:
if (!parse_sexp_ignore_comments) break;
- while (1)
+ UPDATE_SYNTAX_TABLE_FORWARD (from);
+ found = forw_comment (from, from_byte, stop,
+ comnested, comstyle, 0,
+ &out_charpos, &out_bytepos, &dummy);
+ from = out_charpos, from_byte = out_bytepos;
+ if (!found)
{
- if (from == stop)
- {
- if (depth == 0)
- goto done;
- goto lose;
- }
- c = FETCH_CHAR (from);
- if (SYNTAX (c) == Sendcomment
- && SYNTAX_COMMENT_STYLE (c) == comstyle)
- /* we have encountered a comment end of the same style
- as the comment sequence which began this comment
- section */
- break;
- INC_POS (from);
- if (from < stop && SYNTAX_COMEND_FIRST (c)
- && SYNTAX_COMEND_SECOND (FETCH_CHAR (from))
- && SYNTAX_COMMENT_STYLE (c) == comstyle)
- /* we have encountered a comment end of the same style
- as the comment sequence which began this comment
- section */
- { INC_POS (from); break; }
+ if (depth == 0)
+ goto done;
+ goto lose;
}
+ INC_BOTH (from, from_byte);
+ UPDATE_SYNTAX_TABLE_FORWARD (from);
break;
case Smath:
if (!sexpflag)
break;
- if (from != stop && c == FETCH_CHAR (from))
- INC_POS (from);
+ if (from != stop && c == FETCH_CHAR (from_byte))
+ {
+ INC_BOTH (from, from_byte);
+ }
if (mathexit)
{
mathexit = 0;
break;
case Sstring:
- temp_pos = from;
- DEC_POS (temp_pos);
+ case Sstring_fence:
+ temp_pos = dec_bytepos (from_byte);
stringterm = FETCH_CHAR (temp_pos);
while (1)
{
if (from >= stop) goto lose;
- if (FETCH_CHAR (from) == stringterm) break;
- switch (SWITCH_ENUM_CAST (SYNTAX (FETCH_CHAR (from))))
+ UPDATE_SYNTAX_TABLE_FORWARD (from);
+ c = FETCH_CHAR (from_byte);
+ if (code == Sstring
+ ? (c == stringterm
+ && SYNTAX_WITH_MULTIBYTE_CHECK (c) == Sstring)
+ : SYNTAX_WITH_MULTIBYTE_CHECK (c) == Sstring_fence)
+ break;
+
+ /* Some compilers can't handle this inside the switch. */
+ temp = SYNTAX_WITH_MULTIBYTE_CHECK (c);
+ switch (temp)
{
case Scharquote:
case Sescape:
- INC_POS (from);
+ INC_BOTH (from, from_byte);
}
- INC_POS (from);
+ INC_BOTH (from, from_byte);
}
- INC_POS (from);
+ INC_BOTH (from, from_byte);
if (!depth && sexpflag) goto done;
break;
}
while (count < 0)
{
- stop = BEGV;
while (from > stop)
{
- DEC_POS (from);
- if (quoted = char_quoted (from))
- DEC_POS (from);
- c = FETCH_CHAR (from);
- code = SYNTAX (c);
+ DEC_BOTH (from, from_byte);
+ UPDATE_SYNTAX_TABLE_BACKWARD (from);
+ c = FETCH_CHAR (from_byte);
+ code = SYNTAX_WITH_MULTIBYTE_CHECK (c);
if (depth == min_depth)
last_good = from;
comstyle = 0;
+ comnested = SYNTAX_COMMENT_NESTED (c);
if (code == Sendcomment)
comstyle = SYNTAX_COMMENT_STYLE (c);
- temp_pos = from;
- DEC_POS (temp_pos);
if (from > stop && SYNTAX_COMEND_SECOND (c)
- && (c1 = FETCH_CHAR (temp_pos), SYNTAX_COMEND_FIRST (c1))
- && !char_quoted (temp_pos)
+ && prev_char_comend_first (from, from_byte)
&& parse_sexp_ignore_comments)
{
- /* we must record the comment style encountered so that
+ /* We must record the comment style encountered so that
later, we can match only the proper comment begin
- sequence of the same style */
+ sequence of the same style. */
+ DEC_BOTH (from, from_byte);
+ UPDATE_SYNTAX_TABLE_BACKWARD (from);
code = Sendcomment;
+ c1 = FETCH_CHAR (from_byte);
comstyle = SYNTAX_COMMENT_STYLE (c1);
- from = temp_pos;
+ comnested = comnested || SYNTAX_COMMENT_NESTED (c1);
}
- if (SYNTAX_PREFIX (c))
+ /* Quoting turns anything except a comment-ender
+ into a word character. Note that this cannot be true
+ if we decremented FROM in the if-statement above. */
+ if (code != Sendcomment && char_quoted (from, from_byte))
+ code = Sword;
+ else if (SYNTAX_PREFIX (c))
continue;
- switch (SWITCH_ENUM_CAST (quoted ? Sword : code))
+ switch (SWITCH_ENUM_CAST (code))
{
case Sword:
case Ssymbol:
+ case Sescape:
+ case Scharquote:
if (depth || !sexpflag) break;
- /* This word counts as a sexp; count object finished after passing it. */
+ /* This word counts as a sexp; count object finished
+ after passing it. */
while (from > stop)
{
- temp_pos = from;
- DEC_POS (temp_pos);
- quoted = char_quoted (temp_pos);
+ temp_pos = from_byte;
+ if (! NILP (current_buffer->enable_multibyte_characters))
+ DEC_POS (temp_pos);
+ else
+ temp_pos--;
+ UPDATE_SYNTAX_TABLE_BACKWARD (from - 1);
+ c1 = FETCH_CHAR (temp_pos);
+ temp_code = SYNTAX_WITH_MULTIBYTE_CHECK (c1);
+ /* Don't allow comment-end to be quoted. */
+ if (temp_code == Sendcomment)
+ goto done2;
+ quoted = char_quoted (from - 1, temp_pos);
if (quoted)
{
- from = temp_pos;
- DEC_POS (temp_pos);
+ DEC_BOTH (from, from_byte);
+ temp_pos = dec_bytepos (temp_pos);
+ UPDATE_SYNTAX_TABLE_BACKWARD (from - 1);
}
c1 = FETCH_CHAR (temp_pos);
- temp_code = SYNTAX (c1);
+ temp_code = SYNTAX_WITH_MULTIBYTE_CHECK (c1);
if (! (quoted || temp_code == Sword
|| temp_code == Ssymbol
|| temp_code == Squote))
goto done2;
- from = temp_pos;
+ DEC_BOTH (from, from_byte);
}
goto done2;
case Smath:
if (!sexpflag)
break;
- temp_pos = from;
- DEC_POS (temp_pos);
+ temp_pos = dec_bytepos (from_byte);
+ UPDATE_SYNTAX_TABLE_BACKWARD (from - 1);
if (from != stop && c == FETCH_CHAR (temp_pos))
- from = temp_pos;
+ DEC_BOTH (from, from_byte);
if (mathexit)
{
mathexit = 0;
case Sendcomment:
if (!parse_sexp_ignore_comments)
break;
-#if 0
- if (code != SYNTAX (c))
- /* For a two-char comment ender, we can assume
- it does end a comment. So scan back in a simple way. */
+ found = back_comment (from, from_byte, stop, comnested, comstyle,
+ &out_charpos, &out_bytepos);
+ /* FIXME: if found == -1, then it really wasn't a comment-end.
+ For single-char Sendcomment, we can't do much about it apart
+ from skipping the char.
+ For 2-char endcomments, we could try again, taking both
+ chars as separate entities, but it's a lot of trouble
+ for very little gain, so we don't bother either. -sm */
+ if (found != -1)
+ from = out_charpos, from_byte = out_bytepos;
+ break;
+
+ case Scomment_fence:
+ case Sstring_fence:
+ while (1)
{
- if (from != stop) DEC_POS (from);
- while (1)
- {
- if (SYNTAX (c = FETCH_CHAR (from)) == Scomment
- && SYNTAX_COMMENT_STYLE (c) == comstyle)
- break;
- if (from == stop)
- {
- if (depth == 0)
- goto done2;
- goto lose;
- }
- DEC_POS (from);
- if (SYNTAX_COMSTART_SECOND (c)
- && SYNTAX_COMSTART_FIRST (FETCH_CHAR (from))
- && SYNTAX_COMMENT_STYLE (c) == comstyle
- && !char_quoted (from))
- break;
- }
- break;
+ DEC_BOTH (from, from_byte);
+ if (from == stop) goto lose;
+ UPDATE_SYNTAX_TABLE_BACKWARD (from);
+ if (!char_quoted (from, from_byte)
+ && (c = FETCH_CHAR (from_byte),
+ SYNTAX_WITH_MULTIBYTE_CHECK (c) == code))
+ break;
}
-#endif /* 0 */
-
- /* Look back, counting the parity of string-quotes,
- and recording the comment-starters seen.
- When we reach a safe place, assume that's not in a string;
- then step the main scan to the earliest comment-starter seen
- an even number of string quotes away from the safe place.
-
- OFROM[I] is position of the earliest comment-starter seen
- which is I+2X quotes from the comment-end.
- PARITY is current parity of quotes from the comment end. */
- {
- int parity = 0;
- char my_stringend = 0;
- int string_lossage = 0;
- int comment_end = from;
- int comstart_pos = 0;
- int comstart_parity = 0;
- int scanstart = from;
-
- DEC_POS (scanstart);
-
- /* At beginning of range to scan, we're outside of strings;
- that determines quote parity to the comment-end. */
- while (from != stop)
- {
- /* Move back and examine a character. */
- DEC_POS (from);
-
- c = FETCH_CHAR (from);
- code = SYNTAX (c);
-
- /* If this char is the second of a 2-char comment sequence,
- back up and give the pair the appropriate syntax. */
- temp_pos = from;
- DEC_POS (temp_pos);
- if (from > stop && SYNTAX_COMEND_SECOND (c)
- && (c1 = FETCH_CHAR (temp_pos),
- SYNTAX_COMEND_FIRST (c1)))
- {
- code = Sendcomment;
- from = temp_pos;
- c = c1;
- }
-
- /* If this char starts a 2-char comment start sequence,
- treat it like a 1-char comment starter. */
- temp_pos = from;
- INC_POS (temp_pos);
- if (from < scanstart && SYNTAX_COMSTART_FIRST (c)
- && (c1 = FETCH_CHAR (temp_pos),
- SYNTAX_COMSTART_SECOND (c1))
- && comstyle == SYNTAX_COMMENT_STYLE (c1))
- code = Scomment;
-
- /* Ignore escaped characters. */
- if (char_quoted (from))
- continue;
-
- /* Track parity of quotes. */
- if (code == Sstring)
- {
- parity ^= 1;
- if (my_stringend == 0)
- my_stringend = c;
- /* If we have two kinds of string delimiters.
- There's no way to grok this scanning backwards. */
- else if (my_stringend != c)
- string_lossage = 1;
- }
-
- /* Record comment-starters according to that
- quote-parity to the comment-end. */
- if (code == Scomment)
- {
- comstart_parity = parity;
- comstart_pos = from;
- }
-
- /* If we find another earlier comment-ender,
- any comment-starts earlier than that don't count
- (because they go with the earlier comment-ender). */
- if (code == Sendcomment
- && SYNTAX_COMMENT_STYLE (FETCH_CHAR (from)) == comstyle)
- break;
-
- /* Assume a defun-start point is outside of strings. */
- if (code == Sopen
- && (from == stop || FETCH_BYTE (from - 1) == '\n'))
- break;
- }
-
- if (comstart_pos == 0)
- from = comment_end;
- /* If the earliest comment starter
- is followed by uniform paired string quotes or none,
- we know it can't be inside a string
- since if it were then the comment ender would be inside one.
- So it does start a comment. Skip back to it. */
- else if (comstart_parity == 0 && !string_lossage)
- from = comstart_pos;
- else
- {
- /* We had two kinds of string delimiters mixed up
- together. Decode this going forwards.
- Scan fwd from the previous comment ender
- to the one in question; this records where we
- last passed a comment starter. */
- struct lisp_parse_state state;
- scan_sexps_forward (&state, find_defun_start (comment_end),
- comment_end - 1, -10000, 0, Qnil, 0);
- if (state.incomment)
- from = state.comstart;
- else
- /* We can't grok this as a comment; scan it normally. */
- from = comment_end;
- }
- }
+ if (code == Sstring_fence && !depth && sexpflag) goto done2;
break;
-
+
case Sstring:
- stringterm = FETCH_CHAR (from);
+ stringterm = FETCH_CHAR (from_byte);
while (1)
{
if (from == stop) goto lose;
- temp_pos = from;
- DEC_POS (temp_pos);
- if (!char_quoted (temp_pos)
- && stringterm == FETCH_CHAR (temp_pos))
+ temp_pos = from_byte;
+ if (! NILP (current_buffer->enable_multibyte_characters))
+ DEC_POS (temp_pos);
+ else
+ temp_pos--;
+ UPDATE_SYNTAX_TABLE_BACKWARD (from - 1);
+ if (!char_quoted (from - 1, temp_pos)
+ && stringterm == (c = FETCH_CHAR (temp_pos))
+ && SYNTAX_WITH_MULTIBYTE_CHECK (c) == Sstring)
break;
- from = temp_pos;
+ DEC_BOTH (from, from_byte);
}
- DEC_POS (from);
+ DEC_BOTH (from, from_byte);
if (!depth && sexpflag) goto done2;
break;
}
/* NOTREACHED */
}
-static int
-char_quoted (pos)
- register int pos;
-{
- register enum syntaxcode code;
- register int beg = BEGV;
- register int quoted = 0;
- int temp_pos = pos;
+DEFUN ("scan-lists", Fscan_lists, Sscan_lists, 3, 3, 0,
+ doc: /* Scan from character number FROM by COUNT lists.
+Returns the character number of the position thus found.
- DEC_POS (temp_pos);
- while (pos > beg
- && ((code = SYNTAX (FETCH_CHAR (temp_pos))) == Scharquote
- || code == Sescape))
- {
- pos = temp_pos;
- quoted = !quoted;
- DEC_POS (temp_pos);
- }
- return quoted;
-}
+If DEPTH is nonzero, paren depth begins counting from that value,
+only places where the depth in parentheses becomes zero
+are candidates for stopping; COUNT such places are counted.
+Thus, a positive value for DEPTH means go out levels.
-DEFUN ("scan-lists", Fscan_lists, Sscan_lists, 3, 3, 0,
- "Scan from character number FROM by COUNT lists.\n\
-Returns the character number of the position thus found.\n\
-\n\
-If DEPTH is nonzero, paren depth begins counting from that value,\n\
-only places where the depth in parentheses becomes zero\n\
-are candidates for stopping; COUNT such places are counted.\n\
-Thus, a positive value for DEPTH means go out levels.\n\
-\n\
-Comments are ignored if `parse-sexp-ignore-comments' is non-nil.\n\
-\n\
-If the beginning or end of (the accessible part of) the buffer is reached\n\
-and the depth is wrong, an error is signaled.\n\
-If the depth is right but the count is not used up, nil is returned.")
- (from, count, depth)
+Comments are ignored if `parse-sexp-ignore-comments' is non-nil.
+
+If the beginning or end of (the accessible part of) the buffer is reached
+and the depth is wrong, an error is signaled.
+If the depth is right but the count is not used up, nil is returned. */)
+ (from, count, depth)
Lisp_Object from, count, depth;
{
- CHECK_NUMBER (from, 0);
- CHECK_NUMBER (count, 1);
- CHECK_NUMBER (depth, 2);
+ CHECK_NUMBER (from);
+ CHECK_NUMBER (count);
+ CHECK_NUMBER (depth);
return scan_lists (XINT (from), XINT (count), XINT (depth), 0);
}
DEFUN ("scan-sexps", Fscan_sexps, Sscan_sexps, 2, 2, 0,
- "Scan from character number FROM by COUNT balanced expressions.\n\
-If COUNT is negative, scan backwards.\n\
-Returns the character number of the position thus found.\n\
-\n\
-Comments are ignored if `parse-sexp-ignore-comments' is non-nil.\n\
-\n\
-If the beginning or end of (the accessible part of) the buffer is reached\n\
-in the middle of a parenthetical grouping, an error is signaled.\n\
-If the beginning or end is reached between groupings\n\
-but before count is used up, nil is returned.")
- (from, count)
+ doc: /* Scan from character number FROM by COUNT balanced expressions.
+If COUNT is negative, scan backwards.
+Returns the character number of the position thus found.
+
+Comments are ignored if `parse-sexp-ignore-comments' is non-nil.
+
+If the beginning or end of (the accessible part of) the buffer is reached
+in the middle of a parenthetical grouping, an error is signaled.
+If the beginning or end is reached between groupings
+but before count is used up, nil is returned. */)
+ (from, count)
Lisp_Object from, count;
{
- CHECK_NUMBER (from, 0);
- CHECK_NUMBER (count, 1);
+ CHECK_NUMBER (from);
+ CHECK_NUMBER (count);
return scan_lists (XINT (from), XINT (count), 0, 1);
}
DEFUN ("backward-prefix-chars", Fbackward_prefix_chars, Sbackward_prefix_chars,
- 0, 0, 0,
- "Move point backward over any number of chars with prefix syntax.\n\
-This includes chars with \"quote\" or \"prefix\" syntax (' or p).")
- ()
+ 0, 0, 0,
+ doc: /* Move point backward over any number of chars with prefix syntax.
+This includes chars with "quote" or "prefix" syntax (' or p). */)
+ ()
{
int beg = BEGV;
+ int opoint = PT;
+ int opoint_byte = PT_BYTE;
int pos = PT;
+ int pos_byte = PT_BYTE;
int c;
- int temp_pos = pos;
- DEC_POS (temp_pos);
+ if (pos <= beg)
+ {
+ SET_PT_BOTH (opoint, opoint_byte);
+
+ return Qnil;
+ }
+
+ SETUP_SYNTAX_TABLE (pos, -1);
- while (pos > beg && !char_quoted (temp_pos)
- && ((c = FETCH_CHAR (temp_pos), SYNTAX (c) == Squote)
+ DEC_BOTH (pos, pos_byte);
+
+ while (!char_quoted (pos, pos_byte)
+ /* Previous statement updates syntax table. */
+ && ((c = FETCH_CHAR (pos_byte), SYNTAX (c) == Squote)
|| SYNTAX_PREFIX (c)))
{
- pos = temp_pos;
- DEC_POS (temp_pos);
+ opoint = pos;
+ opoint_byte = pos_byte;
+
+ if (pos + 1 > beg)
+ DEC_BOTH (pos, pos_byte);
}
- SET_PT (pos);
+ SET_PT_BOTH (opoint, opoint_byte);
return Qnil;
}
\f
-/* Parse forward from FROM to END,
+/* Parse forward from FROM / FROM_BYTE to END,
assuming that FROM has state OLDSTATE (nil means FROM is start of function),
and return a description of the state of the parse at END.
If STOPBEFORE is nonzero, stop at the start of an atom.
- If COMMENTSTOP is nonzero, stop at the start of a comment. */
+ If COMMENTSTOP is 1, stop at the start of a comment.
+ If COMMENTSTOP is -1, stop at the start or end of a comment,
+ after the beginning of a string, or after the end of a string. */
static void
-scan_sexps_forward (stateptr, from, end, targetdepth,
+scan_sexps_forward (stateptr, from, from_byte, end, targetdepth,
stopbefore, oldstate, commentstop)
struct lisp_parse_state *stateptr;
register int from;
struct lisp_parse_state state;
register enum syntaxcode code;
+ int c1;
+ int comnested;
struct level { int last, prev; };
struct level levelstart[100];
register struct level *curlevel = levelstart;
struct level *endlevel = levelstart + 100;
- int prev;
register int depth; /* Paren depth of current scanning location.
level - levelstart equals this except
when the depth becomes negative. */
int start_quoted = 0; /* Nonzero means starting after a char quote */
Lisp_Object tem;
int prev_from; /* Keep one character before FROM. */
+ int prev_from_byte;
+ int prev_from_syntax;
+ int boundary_stop = commentstop == -1;
+ int nofence;
+ int found;
+ int out_bytepos, out_charpos;
+ int temp;
prev_from = from;
- DEC_POS (prev_from);
+ prev_from_byte = from_byte;
+ if (from != BEGV)
+ DEC_BOTH (prev_from, prev_from_byte);
/* Use this macro instead of `from++'. */
-#define INC_FROM do { prev_from = from; INC_POS (from); } while (0)
+#define INC_FROM \
+do { prev_from = from; \
+ prev_from_byte = from_byte; \
+ prev_from_syntax \
+ = SYNTAX_WITH_FLAGS (FETCH_CHAR (prev_from_byte)); \
+ INC_BOTH (from, from_byte); \
+ UPDATE_SYNTAX_TABLE_FORWARD (from); \
+ } while (0)
immediate_quit = 1;
QUIT;
depth = 0;
state.instring = -1;
state.incomment = 0;
- state.comstyle = 0; /* comment style a by default */
+ state.comstyle = 0; /* comment style a by default. */
+ state.comstr_start = -1; /* no comment/string seen. */
}
else
{
oldstate = Fcdr (oldstate);
oldstate = Fcdr (oldstate);
tem = Fcar (oldstate);
- state.instring = !NILP (tem) ? XINT (tem) : -1;
+ /* Check whether we are inside string_fence-style string: */
+ state.instring = (!NILP (tem)
+ ? (INTEGERP (tem) ? XINT (tem) : ST_STRING_STYLE)
+ : -1);
oldstate = Fcdr (oldstate);
tem = Fcar (oldstate);
- state.incomment = !NILP (tem);
+ state.incomment = (!NILP (tem)
+ ? (INTEGERP (tem) ? XINT (tem) : -1)
+ : 0);
oldstate = Fcdr (oldstate);
tem = Fcar (oldstate);
start_quoted = !NILP (tem);
- /* if the eight element of the list is nil, we are in comment
- style a. if it is non-nil, we are in comment style b */
+ /* if the eighth element of the list is nil, we are in comment
+ style a. If it is non-nil, we are in comment style b */
+ oldstate = Fcdr (oldstate);
+ oldstate = Fcdr (oldstate);
+ tem = Fcar (oldstate);
+ state.comstyle = NILP (tem) ? 0 : (EQ (tem, Qsyntax_table)
+ ? ST_COMMENT_STYLE : 1);
+
oldstate = Fcdr (oldstate);
+ tem = Fcar (oldstate);
+ state.comstr_start = NILP (tem) ? -1 : XINT (tem) ;
oldstate = Fcdr (oldstate);
tem = Fcar (oldstate);
- state.comstyle = !NILP (tem);
+ while (!NILP (tem)) /* >= second enclosing sexps. */
+ {
+ /* curlevel++->last ran into compiler bug on Apollo */
+ curlevel->last = XINT (Fcar (tem));
+ if (++curlevel == endlevel)
+ curlevel--; /* error ("Nesting too deep for parser"); */
+ curlevel->prev = -1;
+ curlevel->last = -1;
+ tem = Fcdr (tem);
+ }
}
state.quoted = 0;
mindepth = depth;
curlevel->prev = -1;
curlevel->last = -1;
- /* Enter the loop at a place appropriate for initial state. */
+ SETUP_SYNTAX_TABLE (prev_from, 1);
+ prev_from_syntax = SYNTAX_WITH_FLAGS (FETCH_CHAR (prev_from_byte));
+ UPDATE_SYNTAX_TABLE_FORWARD (from);
- if (state.incomment) goto startincomment;
+ /* Enter the loop at a place appropriate for initial state. */
+
+ if (state.incomment)
+ goto startincomment;
if (state.instring >= 0)
{
- if (start_quoted) goto startquotedinstring;
+ nofence = state.instring != ST_STRING_STYLE;
+ if (start_quoted)
+ goto startquotedinstring;
goto startinstring;
}
- if (start_quoted) goto startquoted;
+ else if (start_quoted)
+ goto startquoted;
+
+#if 0 /* This seems to be redundant with the identical code above. */
+ SETUP_SYNTAX_TABLE (prev_from, 1);
+ prev_from_syntax = SYNTAX_WITH_FLAGS (FETCH_CHAR (prev_from_byte));
+ UPDATE_SYNTAX_TABLE_FORWARD (from);
+#endif
while (from < end)
{
- code = SYNTAX (FETCH_CHAR (from));
INC_FROM;
+ code = prev_from_syntax & 0xff;
+
if (code == Scomment)
- state.comstart = prev_from;
-
- else if (from < end && SYNTAX_COMSTART_FIRST (FETCH_CHAR (prev_from))
- && SYNTAX_COMSTART_SECOND (FETCH_CHAR (from)))
+ {
+ state.comstyle = SYNTAX_FLAGS_COMMENT_STYLE (prev_from_syntax);
+ state.incomment = (SYNTAX_FLAGS_COMMENT_NESTED (prev_from_syntax) ?
+ 1 : -1);
+ state.comstr_start = prev_from;
+ }
+ else if (code == Scomment_fence)
{
/* Record the comment style we have entered so that only
the comment-end sequence of the same style actually
terminates the comment section. */
+ state.comstyle = ST_COMMENT_STYLE;
+ state.incomment = -1;
+ state.comstr_start = prev_from;
code = Scomment;
- state.comstyle = SYNTAX_COMMENT_STYLE (FETCH_CHAR (from));
- state.comstart = prev_from;
- INC_FROM;
}
+ else if (from < end)
+ if (SYNTAX_FLAGS_COMSTART_FIRST (prev_from_syntax))
+ if (c1 = FETCH_CHAR (from_byte),
+ SYNTAX_COMSTART_SECOND (c1))
+ /* Duplicate code to avoid a complex if-expression
+ which causes trouble for the SGI compiler. */
+ {
+ /* Record the comment style we have entered so that only
+ the comment-end sequence of the same style actually
+ terminates the comment section. */
+ state.comstyle = SYNTAX_COMMENT_STYLE (FETCH_CHAR (from_byte));
+ comnested = SYNTAX_FLAGS_COMMENT_NESTED (prev_from_syntax);
+ comnested = comnested || SYNTAX_COMMENT_NESTED (c1);
+ state.incomment = comnested ? 1 : -1;
+ state.comstr_start = prev_from;
+ INC_FROM;
+ code = Scomment;
+ }
- if (SYNTAX_PREFIX (FETCH_CHAR (prev_from)))
+ if (SYNTAX_FLAGS_PREFIX (prev_from_syntax))
continue;
switch (SWITCH_ENUM_CAST (code))
{
symstarted:
while (from < end)
{
- switch (SWITCH_ENUM_CAST (SYNTAX (FETCH_CHAR (from))))
+ /* Some compilers can't handle this inside the switch. */
+ temp = SYNTAX (FETCH_CHAR (from_byte));
+ switch (temp)
{
case Scharquote:
case Sescape:
curlevel->prev = curlevel->last;
break;
- startincomment:
- if (commentstop)
- goto done;
- if (from != BEGV)
- {
- /* Enter the loop in the middle so that we find
- a 2-char comment ender if we start in the middle of it. */
- prev = FETCH_CHAR (prev_from);
- goto startincomment_1;
- }
- /* At beginning of buffer, enter the loop the ordinary way. */
-
case Scomment:
- state.incomment = 1;
- if (commentstop)
- goto done;
- while (1)
- {
- if (from == end) goto done;
- prev = FETCH_CHAR (from);
- if (SYNTAX (prev) == Sendcomment
- && SYNTAX_COMMENT_STYLE (prev) == state.comstyle)
- /* Only terminate the comment section if the endcomment
- of the same style as the start sequence has been
- encountered. */
- break;
- INC_FROM;
- startincomment_1:
- if (from < end && SYNTAX_COMEND_FIRST (prev)
- && SYNTAX_COMEND_SECOND (FETCH_CHAR (from))
- && SYNTAX_COMMENT_STYLE (prev) == state.comstyle)
- /* Only terminate the comment section if the end-comment
- sequence of the same style as the start sequence has
- been encountered. */
- { INC_FROM; break; }
- }
+ if (commentstop || boundary_stop) goto done;
+ startincomment:
+ /* The (from == BEGV) test was to enter the loop in the middle so
+ that we find a 2-char comment ender even if we start in the
+ middle of it. We don't want to do that if we're just at the
+ beginning of the comment (think of (*) ... (*)). */
+ found = forw_comment (from, from_byte, end,
+ state.incomment, state.comstyle,
+ (from == BEGV || from < state.comstr_start + 3)
+ ? 0 : prev_from_syntax,
+ &out_charpos, &out_bytepos, &state.incomment);
+ from = out_charpos; from_byte = out_bytepos;
+ /* Beware! prev_from and friends are invalid now.
+ Luckily, the `done' doesn't use them and the INC_FROM
+ sets them to a sane value without looking at them. */
+ if (!found) goto done;
+ INC_FROM;
state.incomment = 0;
state.comstyle = 0; /* reset the comment style */
+ if (boundary_stop) goto done;
break;
case Sopen:
/* curlevel++->last ran into compiler bug on Apollo */
curlevel->last = prev_from;
if (++curlevel == endlevel)
- error ("Nesting too deep for parser");
+ curlevel--; /* error ("Nesting too deep for parser"); */
curlevel->prev = -1;
curlevel->last = -1;
if (targetdepth == depth) goto done;
break;
case Sstring:
+ case Sstring_fence:
+ state.comstr_start = from - 1;
if (stopbefore) goto stop; /* this arg means stop at sexp start */
curlevel->last = prev_from;
- state.instring = FETCH_CHAR (prev_from);
+ state.instring = (code == Sstring
+ ? (FETCH_CHAR (prev_from_byte))
+ : ST_STRING_STYLE);
+ if (boundary_stop) goto done;
startinstring:
- while (1)
- {
- int c;
+ {
+ nofence = state.instring != ST_STRING_STYLE;
+
+ while (1)
+ {
+ int c;
- if (from >= end) goto done;
- c = FETCH_CHAR (from);
- if (c == state.instring) break;
- switch (SWITCH_ENUM_CAST (SYNTAX (c)))
- {
- case Scharquote:
- case Sescape:
- INC_FROM;
- startquotedinstring:
- if (from >= end) goto endquoted;
- }
- INC_FROM;
- }
+ if (from >= end) goto done;
+ c = FETCH_CHAR (from_byte);
+ /* Some compilers can't handle this inside the switch. */
+ temp = SYNTAX (c);
+
+ /* Check TEMP here so that if the char has
+ a syntax-table property which says it is NOT
+ a string character, it does not end the string. */
+ if (nofence && c == state.instring && temp == Sstring)
+ break;
+
+ switch (temp)
+ {
+ case Sstring_fence:
+ if (!nofence) goto string_end;
+ break;
+ case Scharquote:
+ case Sescape:
+ INC_FROM;
+ startquotedinstring:
+ if (from >= end) goto endquoted;
+ }
+ INC_FROM;
+ }
+ }
+ string_end:
state.instring = -1;
curlevel->prev = curlevel->last;
INC_FROM;
+ if (boundary_stop) goto done;
break;
case Smath:
state.prevlevelstart
= (curlevel == levelstart) ? -1 : (curlevel - 1)->last;
state.location = from;
+ state.levelstarts = Qnil;
+ while (--curlevel >= levelstart)
+ state.levelstarts = Fcons (make_number (curlevel->last),
+ state.levelstarts);
immediate_quit = 0;
*stateptr = state;
}
-/* This comment supplies the doc string for parse-partial-sexp,
- for make-docfile to see. We cannot put this in the real DEFUN
- due to limits in the Unix cpp.
-
-DEFUN ("parse-partial-sexp", Ffoo, Sfoo, 2, 6, 0,
- "Parse Lisp syntax starting at FROM until TO; return status of parse at TO.\n\
-Parsing stops at TO or when certain criteria are met;\n\
- point is set to where parsing stops.\n\
-If fifth arg STATE is omitted or nil,\n\
- parsing assumes that FROM is the beginning of a function.\n\
-Value is a list of eight elements describing final state of parsing:\n\
- 0. depth in parens.\n\
- 1. character address of start of innermost containing list; nil if none.\n\
- 2. character address of start of last complete sexp terminated.\n\
- 3. non-nil if inside a string.\n\
- (it is the character that will terminate the string.)\n\
- 4. t if inside a comment.\n\
- 5. t if following a quote character.\n\
- 6. the minimum paren-depth encountered during this scan.\n\
- 7. t if in a comment of style `b'.\n\
-If third arg TARGETDEPTH is non-nil, parsing stops if the depth\n\
-in parentheses becomes equal to TARGETDEPTH.\n\
-Fourth arg STOPBEFORE non-nil means stop when come to\n\
- any character that starts a sexp.\n\
-Fifth arg STATE is an eight-list like what this function returns.\n\
-It is used to initialize the state of the parse. Its second and third
-elements are ignored.
-Sixth args COMMENTSTOP non-nil means stop at the start of a comment.")
- (from, to, targetdepth, stopbefore, state, commentstop)
-*/
-
DEFUN ("parse-partial-sexp", Fparse_partial_sexp, Sparse_partial_sexp, 2, 6, 0,
- 0 /* See immediately above */)
- (from, to, targetdepth, stopbefore, oldstate, commentstop)
+ doc: /* Parse Lisp syntax starting at FROM until TO; return status of parse at TO.
+Parsing stops at TO or when certain criteria are met;
+ point is set to where parsing stops.
+If fifth arg OLDSTATE is omitted or nil,
+ parsing assumes that FROM is the beginning of a function.
+Value is a list of ten elements describing final state of parsing:
+ 0. depth in parens.
+ 1. character address of start of innermost containing list; nil if none.
+ 2. character address of start of last complete sexp terminated.
+ 3. non-nil if inside a string.
+ (it is the character that will terminate the string,
+ or t if the string should be terminated by a generic string delimiter.)
+ 4. nil if outside a comment, t if inside a non-nestable comment,
+ else an integer (the current comment nesting).
+ 5. t if following a quote character.
+ 6. the minimum paren-depth encountered during this scan.
+ 7. t if in a comment of style b; symbol `syntax-table' if the comment
+ should be terminated by a generic comment delimiter.
+ 8. character address of start of comment or string; nil if not in one.
+ 9. Intermediate data for continuation of parsing (subject to change).
+If third arg TARGETDEPTH is non-nil, parsing stops if the depth
+in parentheses becomes equal to TARGETDEPTH.
+Fourth arg STOPBEFORE non-nil means stop when come to
+ any character that starts a sexp.
+Fifth arg OLDSTATE is a nine-element list like what this function returns.
+ It is used to initialize the state of the parse. Elements number 1, 2, 6
+ and 8 are ignored; you can leave off element 8 (the last) entirely.
+Sixth arg COMMENTSTOP non-nil means stop at the start of a comment.
+ If it is symbol `syntax-table', stop after the start of a comment or a
+ string, or after end of a comment or a string. */)
+ (from, to, targetdepth, stopbefore, oldstate, commentstop)
Lisp_Object from, to, targetdepth, stopbefore, oldstate, commentstop;
{
struct lisp_parse_state state;
if (!NILP (targetdepth))
{
- CHECK_NUMBER (targetdepth, 3);
+ CHECK_NUMBER (targetdepth);
target = XINT (targetdepth);
}
else
target = -100000; /* We won't reach this depth */
validate_region (&from, &to);
- scan_sexps_forward (&state, XINT (from), XINT (to),
+ scan_sexps_forward (&state, XINT (from), CHAR_TO_BYTE (XINT (from)),
+ XINT (to),
target, !NILP (stopbefore), oldstate,
- !NILP (commentstop));
+ (NILP (commentstop)
+ ? 0 : (EQ (commentstop, Qsyntax_table) ? -1 : 1)));
SET_PT (state.location);
return Fcons (make_number (state.depth),
Fcons (state.prevlevelstart < 0 ? Qnil : make_number (state.prevlevelstart),
Fcons (state.thislevelstart < 0 ? Qnil : make_number (state.thislevelstart),
- Fcons (state.instring >= 0 ? make_number (state.instring) : Qnil,
- Fcons (state.incomment ? Qt : Qnil,
+ Fcons (state.instring >= 0
+ ? (state.instring == ST_STRING_STYLE
+ ? Qt : make_number (state.instring)) : Qnil,
+ Fcons (state.incomment < 0 ? Qt :
+ (state.incomment == 0 ? Qnil :
+ make_number (state.incomment)),
Fcons (state.quoted ? Qt : Qnil,
- Fcons (make_number (state.mindepth),
- Fcons (state.comstyle ? Qt : Qnil,
- Qnil))))))));
+ Fcons (make_number (state.mindepth),
+ Fcons ((state.comstyle
+ ? (state.comstyle == ST_COMMENT_STYLE
+ ? Qsyntax_table : Qt) :
+ Qnil),
+ Fcons (((state.incomment
+ || (state.instring >= 0))
+ ? make_number (state.comstr_start)
+ : Qnil),
+ Fcons (state.levelstarts, Qnil))))))))));
}
\f
+void
init_syntax_once ()
{
- register int i;
+ register int i, c;
Lisp_Object temp;
/* This has to be done here, before we call Fmake_char_table. */
Qchar_table_extra_slots = intern ("char-table-extra-slots");
/* Create objects which can be shared among syntax tables. */
- Vsyntax_code_object = Fmake_vector (13, Qnil);
+ Vsyntax_code_object = Fmake_vector (make_number (Smax), Qnil);
for (i = 0; i < XVECTOR (Vsyntax_code_object)->size; i++)
XVECTOR (Vsyntax_code_object)->contents[i]
= Fcons (make_number (i), Qnil);
temp = XVECTOR (Vsyntax_code_object)->contents[(int) Ssymbol];
for (i = 0; i < 10; i++)
- SET_RAW_SYNTAX_ENTRY (Vstandard_syntax_table, "_-+*/&|<>="[i], temp);
+ {
+ c = "_-+*/&|<>="[i];
+ SET_RAW_SYNTAX_ENTRY (Vstandard_syntax_table, c, temp);
+ }
temp = XVECTOR (Vsyntax_code_object)->contents[(int) Spunct];
for (i = 0; i < 12; i++)
- SET_RAW_SYNTAX_ENTRY (Vstandard_syntax_table, ".,;:?!#@~^'`"[i], temp);
+ {
+ c = ".,;:?!#@~^'`"[i];
+ SET_RAW_SYNTAX_ENTRY (Vstandard_syntax_table, c, temp);
+ }
+
+ /* All multibyte characters have syntax `word' by default. */
+ temp = XVECTOR (Vsyntax_code_object)->contents[(int) Sword];
+ for (i = CHAR_TABLE_SINGLE_BYTE_SLOTS; i < CHAR_TABLE_ORDINARY_SLOTS; i++)
+ XCHAR_TABLE (Vstandard_syntax_table)->contents[i] = temp;
}
+void
syms_of_syntax ()
{
Qsyntax_table_p = intern ("syntax-table-p");
Qscan_error = intern ("scan-error");
staticpro (&Qscan_error);
Fput (Qscan_error, Qerror_conditions,
- Fcons (Qerror, Qnil));
+ Fcons (Qscan_error, Fcons (Qerror, Qnil)));
Fput (Qscan_error, Qerror_message,
build_string ("Scan error"));
DEFVAR_BOOL ("parse-sexp-ignore-comments", &parse_sexp_ignore_comments,
- "Non-nil means `forward-sexp', etc., should treat comments as whitespace.");
+ doc: /* Non-nil means `forward-sexp', etc., should treat comments as whitespace. */);
+
+ DEFVAR_BOOL ("parse-sexp-lookup-properties", &parse_sexp_lookup_properties,
+ doc: /* Non-nil means `forward-sexp', etc., obey `syntax-table' property.
+Otherwise, that text property is simply ignored.
+See the info node `(elisp)Syntax Properties' for a description of the
+`syntax-table' property. */);
words_include_escapes = 0;
DEFVAR_BOOL ("words-include-escapes", &words_include_escapes,
- "Non-nil means `forward-word', etc., should treat escape chars part of words.");
+ doc: /* Non-nil means `forward-word', etc., should treat escape chars part of words. */);
+
+ DEFVAR_BOOL ("multibyte-syntax-as-symbol", &multibyte_syntax_as_symbol,
+ doc: /* Non-nil means `scan-sexps' treats all multibyte characters as symbol. */);
+ multibyte_syntax_as_symbol = 0;
+
+ DEFVAR_BOOL ("open-paren-in-column-0-is-defun-start",
+ &open_paren_in_column_0_is_defun_start,
+ doc: /* Non-nil means an open paren in column 0 denotes the start of a defun. */);
+ open_paren_in_column_0_is_defun_start = 1;
defsubr (&Ssyntax_table_p);
defsubr (&Ssyntax_table);
defsubr (&Sset_syntax_table);
defsubr (&Schar_syntax);
defsubr (&Smatching_paren);
+ defsubr (&Sstring_to_syntax);
defsubr (&Smodify_syntax_entry);
defsubr (&Sdescribe_syntax);
+ defsubr (&Sinternal_describe_syntax_value);
defsubr (&Sforward_word);
+ defsubr (&Sskip_chars_forward);
+ defsubr (&Sskip_chars_backward);
+ defsubr (&Sskip_syntax_forward);
+ defsubr (&Sskip_syntax_backward);
+
defsubr (&Sforward_comment);
defsubr (&Sscan_lists);
defsubr (&Sscan_sexps);
HCoop / bpt / emacs.git / blobdiff