less-25/less/line.c

142 is_ascii_char(ch)
143 	LWCHAR ch;
145 	return (ch <= 0x7F);
291 			LWCHAR ch;
296 			ch = get_wchar(linebuf + from);
297 			if (!is_composing_char(ch) && !is_combining_char(prev_ch, ch))
298 				width = is_wide_char(ch) ? 2 : 1;
299 			prev_ch = ch;
423 pwidth(ch, a, prev_ch)
424 	LWCHAR ch;
430 	if (ch == '\b')
437 	if (!utf_mode || is_ascii_char(ch))
439 		if (control_char((char)ch))
450 		if (is_composing_char(ch) || is_combining_char(prev_ch, ch))
472 	if (is_wide_char(ch))
491 	LWCHAR ch = step_char(&p, -1, linebuf + lmargin);
501 		width = pwidth(ch, attr[curr], prev_ch);
505 		ch = prev_ch;
525 		LWCHAR ch = step_char(&p, -1, linebuf);
526 		if (IS_CSI_START(ch))
528 		if (!is_ansi_middle(ch))
538 is_ansi_end(ch)
539 	LWCHAR ch;
541 	if (!is_ascii_char(ch))
543 	return (strchr(end_ansi_chars, (char) ch) != NULL);
550 is_ansi_middle(ch)
551 	LWCHAR ch;
553 	if (!is_ascii_char(ch))
555 	if (is_ansi_end(ch))
557 	return (strchr(mid_ansi_chars, (char) ch) != NULL);
563 #define	STORE_CHAR(ch,a,rep,pos) \
565 		if (store_char((ch),(a),(rep),(pos))) return (1); \
569 store_char(ch, a, rep, pos)
570 	LWCHAR ch;
601 		if (!is_ansi_end(ch) && !is_ansi_middle(ch)) {
613 	else if (ctldisp == OPT_ONPLUS && IS_CSI_START(ch))
622 		w = pwidth(ch, a, prev_ch);
633 		cs = (char) ch;
846 do_append(ch, rep, pos)
847 	LWCHAR ch;
856 	if (ch == '\b')
871 			STORE_CHAR(ch, AT_NORMAL, NULL, pos);
891 		if (ch == prev_ch)
900 			if (ch == '_')
910 		} else if (ch == '_')
913 			ch = prev_ch;
922 		if (   is_composing_char(ch)
923 		    || is_combining_char(get_wchar(linebuf + curr), ch))
930 	if (ch == '\t')
944 	} else if ((!utf_mode || is_ascii_char(ch)) && control_char((char)ch))
947 		if (ctldisp == OPT_ON || (ctldisp == OPT_ONPLUS && IS_CSI_START(ch)))
952 			STORE_CHAR(ch, AT_NORMAL, rep, pos);
955 			STORE_PRCHAR((char) ch, pos);
957 	} else if (utf_mode && ctldisp != OPT_ON && is_ubin_char(ch))
961 		s = prutfchar(ch);
971 		STORE_CHAR(ch, a, rep, pos);