return make_number (1);
}
+
+/* Return width (columns) of C considering the buffer display table DP. */
+
+static int
+char_width (int c, struct Lisp_Char_Table *dp)
+{
+ int width = CHAR_WIDTH (c);
+
+ if (dp)
+ {
+ Lisp_Object disp = DISP_CHAR_VECTOR (dp, c), ch;
+ int i;
+
+ if (VECTORP (disp))
+ for (i = 0, width = 0; i < ASIZE (disp); i++)
+ {
+ ch = AREF (disp, i);
+ if (CHARACTERP (ch))
+ width += CHAR_WIDTH (XFASTINT (ch));
+ }
+ }
+ return width;
+}
+
+
DEFUN ("char-width", Fchar_width, Schar_width, 1, 1, 0,
doc: /* Return width of CHAR when displayed in the current buffer.
The width is measured by how many columns it occupies on the screen.
(ch)
Lisp_Object ch;
{
- Lisp_Object disp;
int c, width;
- struct Lisp_Char_Table *dp = buffer_display_table ();
CHECK_CHARACTER (ch);
c = XINT (ch);
- /* Get the way the display table would display it. */
- disp = dp ? DISP_CHAR_VECTOR (dp, c) : Qnil;
-
- if (VECTORP (disp))
- width = ASIZE (disp);
- else
- width = CHAR_WIDTH (c);
-
+ width = char_width (c, buffer_display_table ());
return make_number (width);
}
while (i_byte < len)
{
- int bytes, thiswidth;
- Lisp_Object val;
+ int bytes;
int c = STRING_CHAR_AND_LENGTH (str + i_byte, bytes);
-
- if (dp)
- {
- val = DISP_CHAR_VECTOR (dp, c);
- if (VECTORP (val))
- thiswidth = XVECTOR_SIZE (val);
- else
- thiswidth = CHAR_WIDTH (c);
- }
- else
- {
- thiswidth = CHAR_WIDTH (c);
- }
+ int thiswidth = char_width (c, dp);
if (precision > 0
&& (width + thiswidth > precision))
else
c = str[i_byte], bytes = 1;
chars = 1;
- if (dp)
- {
- val = DISP_CHAR_VECTOR (dp, c);
- if (VECTORP (val))
- thiswidth = XVECTOR_SIZE (val);
- else
- thiswidth = CHAR_WIDTH (c);
- }
- else
- {
- thiswidth = CHAR_WIDTH (c);
- }
+ thiswidth = char_width (c, dp);
}
if (precision > 0