WidecExt
j = 1 + dst_col - WidecExt(oline->text[src_col]);
if (WidecExt(oline->text[j])) {
fix_left = 1 + j - WidecExt(nline->text[j]);
if (WidecExt(nline->text[j]) != 0) {
#define SetAttr(c,a) AttrOf(c) = ((a) & A_ATTRIBUTES) | WidecExt(c)
#define isWidecBase(ch) (WidecExt(ch) == 1)
#define isWidecExt(ch) (WidecExt(ch) > 1 && WidecExt(ch) < 32)
if (j == 0 || !WidecExt(src[j]) || isWidecBase(src[j])) {