/* Composite sequence support.
- Copyright (C) 2001-2011 Free Software Foundation, Inc.
+ Copyright (C) 2001-2012 Free Software Foundation, Inc.
Copyright (C) 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011
National Institute of Advanced Industrial Science and Technology (AIST)
Registration Number H14PRO021
struct composition **composition_table;
/* The current size of `composition_table'. */
-static int composition_table_size;
+static ptrdiff_t composition_table_size;
/* Number of compositions currently made. */
-int n_compositions;
+ptrdiff_t n_compositions;
/* Hash table for compositions. The key is COMPONENTS-VEC of
`composition' property. The value is the corresponding
If the composition is invalid, return -1. */
-int
+ptrdiff_t
get_composition_id (EMACS_INT charpos, EMACS_INT bytepos, EMACS_INT nchars,
Lisp_Object prop, Lisp_Object string)
{
Lisp_Object id, length, components, key, *key_contents;
- int glyph_len;
+ ptrdiff_t glyph_len;
struct Lisp_Hash_Table *hash_table = XHASH_TABLE (composition_hash_table);
- EMACS_INT hash_index;
+ ptrdiff_t hash_index;
EMACS_UINT hash_code;
+ enum composition_method method;
struct composition *cmp;
EMACS_INT i;
int ch;
+ /* Maximum length of a string of glyphs. XftGlyphExtents limits
+ this to INT_MAX, and Emacs limits it further. Divide INT_MAX - 1
+ by 2 because x_produce_glyphs computes glyph_len * 2 + 1. Divide
+ the size by MAX_MULTIBYTE_LENGTH because encode_terminal_code
+ multiplies glyph_len by MAX_MULTIBYTE_LENGTH. */
+ enum {
+ GLYPH_LEN_MAX = min ((INT_MAX - 1) / 2,
+ min (PTRDIFF_MAX, SIZE_MAX) / MAX_MULTIBYTE_LENGTH)
+ };
+
/* PROP should be
Form-A: ((LENGTH . COMPONENTS) . MODIFICATION-FUNC)
or
/* This composition is a new one. We must register it. */
/* Check if we have sufficient memory to store this information. */
- if (composition_table_size == 0)
- {
- composition_table_size = 256;
- composition_table
- = (struct composition **) xmalloc (sizeof (composition_table[0])
- * composition_table_size);
- }
- else if (composition_table_size <= n_compositions)
- {
- composition_table_size += 256;
- composition_table
- = (struct composition **) xrealloc (composition_table,
- sizeof (composition_table[0])
- * composition_table_size);
- }
+ if (composition_table_size <= n_compositions)
+ composition_table = xpalloc (composition_table, &composition_table_size,
+ 1, -1, sizeof *composition_table);
key_contents = XVECTOR (key)->contents;
&& VECTORP (AREF (components, 0)))
{
/* COMPONENTS is a glyph-string. */
- EMACS_UINT len = ASIZE (key);
+ EMACS_INT len = ASIZE (key);
for (i = 1; i < len; i++)
if (! VECTORP (AREF (key, i)))
}
else if (VECTORP (components) || CONSP (components))
{
- EMACS_UINT len = ASIZE (key);
+ EMACS_INT len = ASIZE (key);
/* The number of elements should be odd. */
if ((len % 2) == 0)
/* Register the composition in composition_hash_table. */
hash_index = hash_put (hash_table, key, id, hash_code);
+ method = (NILP (components)
+ ? COMPOSITION_RELATIVE
+ : ((INTEGERP (components) || STRINGP (components))
+ ? COMPOSITION_WITH_ALTCHARS
+ : COMPOSITION_WITH_RULE_ALTCHARS));
+
+ glyph_len = (method == COMPOSITION_WITH_RULE_ALTCHARS
+ ? (ASIZE (key) + 1) / 2
+ : ASIZE (key));
+
+ if (GLYPH_LEN_MAX < glyph_len)
+ memory_full (SIZE_MAX);
+
/* Register the composition in composition_table. */
cmp = (struct composition *) xmalloc (sizeof (struct composition));
- cmp->method = (NILP (components)
- ? COMPOSITION_RELATIVE
- : ((INTEGERP (components) || STRINGP (components))
- ? COMPOSITION_WITH_ALTCHARS
- : COMPOSITION_WITH_RULE_ALTCHARS));
+ cmp->method = method;
cmp->hash_index = hash_index;
- glyph_len = (cmp->method == COMPOSITION_WITH_RULE_ALTCHARS
- ? (ASIZE (key) + 1) / 2
- : ASIZE (key));
cmp->glyph_len = glyph_len;
- cmp->offsets = (short *) xmalloc (sizeof (short) * glyph_len * 2);
+ cmp->offsets = xnmalloc (glyph_len, 2 * sizeof *cmp->offsets);
cmp->font = NULL;
if (cmp->method != COMPOSITION_WITH_RULE_ALTCHARS)
{
int this_width;
ch = XINT (key_contents[i]);
+ /* TAB in a composition means display glyphs with padding
+ space on the left or right. */
this_width = (ch == '\t' ? 1 : CHAR_WIDTH (ch));
if (cmp->width < this_width)
cmp->width = this_width;
gstring_lookup_cache (Lisp_Object header)
{
struct Lisp_Hash_Table *h = XHASH_TABLE (gstring_hash_table);
- EMACS_INT i = hash_lookup (h, header, NULL);
+ ptrdiff_t i = hash_lookup (h, header, NULL);
return (i >= 0 ? HASH_VALUE (h, i) : Qnil);
}
hash = h->hashfn (h, header);
if (len < 0)
{
- EMACS_UINT j, glyph_len = LGSTRING_GLYPH_LEN (gstring);
+ EMACS_INT j, glyph_len = LGSTRING_GLYPH_LEN (gstring);
for (j = 0; j < glyph_len; j++)
if (NILP (LGSTRING_GLYPH (gstring, j)))
break;
len = j;
}
+ lint_assume (len <= TYPE_MAXIMUM (EMACS_INT) - 2);
copy = Fmake_vector (make_number (len + 2), Qnil);
LGSTRING_SET_HEADER (copy, Fcopy_sequence (header));
for (i = 0; i < len; i++)
}
Lisp_Object
-composition_gstring_from_id (int id)
+composition_gstring_from_id (ptrdiff_t id)
{
struct Lisp_Hash_Table *h = XHASH_TABLE (gstring_hash_table);
composition_gstring_p (Lisp_Object gstring)
{
Lisp_Object header;
- int i;
+ EMACS_INT i;
if (! VECTORP (gstring) || ASIZE (gstring) < 2)
return 0;
for (i = 0; i < len; i++)
{
Lisp_Object g = LGSTRING_GLYPH (gstring, i);
- EMACS_INT c = XINT (AREF (header, i + 1));
+ int c = XFASTINT (AREF (header, i + 1));
if (NILP (g))
{
args[4] = font_object;
args[5] = string;
lgstring = safe_call (6, args);
- if (NILP (string))
- TEMP_SET_PT_BOTH (pt, pt_byte);
}
return unbind_to (count, lgstring);
}
static Lisp_Object _work_val;
-static int _work_char;
/* 1 iff the character C is composable. Characters of general
category Z? or C? are not composable except for ZWNJ and ZWJ. */
((C) > ' ' \
&& ((C) == 0x200C || (C) == 0x200D \
|| (_work_val = CHAR_TABLE_REF (Vunicode_category_table, (C)), \
- (SYMBOLP (_work_val) \
- && (_work_char = SDATA (SYMBOL_NAME (_work_val))[0]) != 'C' \
- && _work_char != 'Z'))))
+ (INTEGERP (_work_val) \
+ && (XINT (_work_val) <= UNICODE_CATEGORY_So)))))
/* Update cmp_it->stop_pos to the next position after CHARPOS (and
BYTEPOS) where character composition may happen. If BYTEPOS is
void
composition_compute_stop_pos (struct composition_it *cmp_it, EMACS_INT charpos, EMACS_INT bytepos, EMACS_INT endpos, Lisp_Object string)
{
- EMACS_INT start, end, c;
+ EMACS_INT start, end;
+ int c;
Lisp_Object prop, val;
/* This is from forward_to_next_line_start in xdisp.c. */
const int MAX_NEWLINE_DISTANCE = 500;
/* FIXME: Bidi is not yet handled well in static composition. */
if (charpos < endpos
&& find_composition (charpos, endpos, &start, &end, &prop, string)
+ && start >= charpos
&& COMPOSITION_VALID_P (start, end, prop))
{
cmp_it->stop_pos = endpos = start;
{
Lisp_Object lgstring = Qnil;
Lisp_Object val, elt;
- int i;
+ EMACS_INT i;
val = CHAR_TABLE_REF (Vcomposition_function_table, cmp_it->ch);
for (i = 0; i < cmp_it->rule_idx; i++, val = XCDR (val));
if (cmp_it->lookback == 0)
goto no_composition;
lgstring = Qnil;
- /* Try to find a shorter compostion that starts after CPOS. */
+ /* Try to find a shorter composition that starts after CPOS. */
composition_compute_stop_pos (cmp_it, charpos, bytepos, cpos,
string);
if (cmp_it->ch == -2 || cmp_it->stop_pos < charpos)
else
{
for (i = 0; i < cmp->glyph_len; i++)
+ /* TAB in a composition means display glyphs with padding
+ space on the left or right. */
if ((c = COMPOSITION_GLYPH (cmp, i)) != '\t')
break;
if (c == '\t')
}
BACKWARD_CHAR (cur, stop);
}
- return 0;
}
/* Return the adjusted point provided that point is moved from LAST_PT
EMACS_INT
composition_adjust_point (EMACS_INT last_pt, EMACS_INT new_pt)
{
- EMACS_INT beg, end;
+ EMACS_INT i, beg, end;
Lisp_Object val;
- int i;
if (new_pt == BEGV || new_pt == ZV)
return new_pt;
{
int i;
- Qcomposition = intern_c_string ("composition");
- staticpro (&Qcomposition);
+ DEFSYM (Qcomposition, "composition");
/* Make a hash table for static composition. */
{
The default value is the function `compose-chars-after'. */);
Vcompose_chars_after_function = intern_c_string ("compose-chars-after");
- Qauto_composed = intern_c_string ("auto-composed");
- staticpro (&Qauto_composed);
-
- Qauto_composition_function = intern_c_string ("auto-composition-function");
- staticpro (&Qauto_composition_function);
+ DEFSYM (Qauto_composed, "auto-composed");
+ DEFSYM (Qauto_composition_function, "auto-composition-function");
DEFVAR_LISP ("auto-composition-mode", Vauto_composition_mode,
doc: /* Non-nil if Auto-Composition mode is enabled.
HCoop / bpt / emacs.git / blobdiff