#include "buffer.h"
#include "charset.h"
#include "keymap.h"
+#include "regex.h"
/* Make syntax table lookup grant data in gl_state. */
#define SYNTAX_ENTRY_VIA_PROPERTY
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 skip_chars P_ ((int, int, Lisp_Object, Lisp_Object, int));
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));
+static int in_classes P_ ((int, Lisp_Object));
\f
struct gl_state_s gl_state; /* Global state of syntax parser. */
(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.
-Note that char classes, e.g. `[:alpha:]', are not currently supported;
-they will be treated as literals. */)
+Char classes, e.g. `[:alpha:]', are supported.
+
+Returns the distance traveled, either zero or positive. */)
(string, lim)
Lisp_Object string, lim;
{
- return skip_chars (1, 0, string, lim);
+ return skip_chars (1, 0, string, lim, 1);
}
DEFUN ("skip-chars-backward", Fskip_chars_backward, Sskip_chars_backward, 1, 2, 0,
(string, lim)
Lisp_Object string, lim;
{
- return skip_chars (0, 0, string, lim);
+ return skip_chars (0, 0, string, lim, 1);
}
DEFUN ("skip-syntax-forward", Fskip_syntax_forward, Sskip_syntax_forward, 1, 2, 0,
(syntax, lim)
Lisp_Object syntax, lim;
{
- return skip_chars (1, 1, syntax, lim);
+ return skip_chars (1, 1, syntax, lim, 0);
}
DEFUN ("skip-syntax-backward", Fskip_syntax_backward, Sskip_syntax_backward, 1, 2, 0,
(syntax, lim)
Lisp_Object syntax, lim;
{
- return skip_chars (0, 1, syntax, lim);
+ return skip_chars (0, 1, syntax, lim, 0);
}
static Lisp_Object
-skip_chars (forwardp, syntaxp, string, lim)
+skip_chars (forwardp, syntaxp, string, lim, handle_iso_classes)
int forwardp, syntaxp;
Lisp_Object string, lim;
+ int handle_iso_classes;
{
register unsigned int c;
unsigned char fastmap[0400];
int size_byte;
const unsigned char *str;
int len;
+ Lisp_Object iso_classes;
CHECK_STRING (string);
char_ranges = (int *) alloca (SCHARS (string) * (sizeof (int)) * 2);
string_multibyte = STRING_MULTIBYTE (string);
str = SDATA (string);
size_byte = SBYTES (string);
+ iso_classes = Qnil;
/* Adjust the multibyteness of the string to that of the buffer. */
if (multibyte != string_multibyte)
fastmap[syntax_spec_code[c & 0377]] = 1;
else
{
+ if (handle_iso_classes && c == '['
+ && i_byte < size_byte
+ && STRING_CHAR (str + i_byte, size_byte - i_byte) == ':')
+ {
+ const unsigned char *class_beg = str + i_byte + 1;
+ const unsigned char *class_end = class_beg;
+ const unsigned char *class_limit = str + size_byte;
+ /* Leave room for the null. */
+ unsigned char class_name[CHAR_CLASS_MAX_LENGTH + 1];
+ re_wctype_t cc;
+
+ if (class_limit - class_beg > CHAR_CLASS_MAX_LENGTH)
+ class_limit = class_beg + CHAR_CLASS_MAX_LENGTH;
+
+ while (class_end != class_limit
+ && ! (*class_end >= 0200
+ || *class_end <= 040
+ || (*class_end == ':'
+ && class_end[1] == ']')))
+ class_end++;
+
+ if (class_end == class_limit
+ || *class_end >= 0200
+ || *class_end <= 040)
+ error ("Invalid ISO C character class");
+
+ bcopy (class_beg, class_name, class_end - class_beg);
+ class_name[class_end - class_beg] = 0;
+
+ cc = re_wctype (class_name);
+ if (cc == 0)
+ error ("Invalid ISO C character class");
+
+ iso_classes = Fcons (make_number (cc), iso_classes);
+
+ i_byte = class_end + 2 - str;
+ continue;
+ }
+
if (c == '\\')
{
if (i_byte == size_byte)
stop = endp;
}
c = STRING_CHAR_AND_LENGTH (p, MAX_MULTIBYTE_LENGTH, nbytes);
+
+ if (! NILP (iso_classes) && in_classes (c, iso_classes))
+ {
+ if (negate)
+ break;
+ else
+ goto fwd_ok;
+ }
+
if (SINGLE_BYTE_CHAR_P (c))
{
if (!fastmap[c])
if (!(negate ^ (i < n_char_ranges)))
break;
}
+ fwd_ok:
p += nbytes, pos++, pos_byte += nbytes;
}
else
p = GAP_END_ADDR;
stop = endp;
}
+
+ if (!NILP (iso_classes) && in_classes (*p, iso_classes))
+ {
+ if (negate)
+ break;
+ else
+ goto fwd_ok;
+ }
+
if (!fastmap[*p])
break;
+
+ fwd_unibyte_ok:
p++, pos++;
}
}
p = prev_p - 1, c = *p, nbytes = 1;
else
c = STRING_CHAR (p, MAX_MULTIBYTE_LENGTH);
+
+ if (! NILP (iso_classes) && in_classes (c, iso_classes))
+ {
+ if (negate)
+ break;
+ else
+ goto back_ok;
+ }
+
if (SINGLE_BYTE_CHAR_P (c))
{
if (!fastmap[c])
if (!(negate ^ (i < n_char_ranges)))
break;
}
+ back_ok:
pos--, pos_byte -= nbytes;
}
else
p = GPT_ADDR;
stop = endp;
}
+
+ if (! NILP (iso_classes) && in_classes (p[-1], iso_classes))
+ {
+ if (negate)
+ break;
+ else
+ goto fwd_ok;
+ }
+
if (!fastmap[p[-1]])
break;
+
+ back_unibyte_ok:
p--, pos--;
}
}
return make_number (PT - start_point);
}
}
+
+/* Return 1 if character C belongs to one of the ISO classes
+ in the list ISO_CLASSES. Each class is represented by an
+ integer which is its type according to re_wctype. */
+
+static int
+in_classes (c, iso_classes)
+ int c;
+ Lisp_Object iso_classes;
+{
+ int fits_class = 0;
+
+ while (! NILP (iso_classes))
+ {
+ Lisp_Object elt;
+ elt = XCAR (iso_classes);
+ iso_classes = XCDR (iso_classes);
+
+ if (re_iswctype (c, XFASTINT (elt)))
+ fits_class = 1;
+ }
+
+ return fits_class;
+}
\f
/* Jump over a comment, assuming we are at the beginning of one.
FROM is the current position.
projects / emacs.git / commitdiff