+ term->post_bidi_cache[line].chars = snewn(size, termchar);
+ term->post_bidi_cache[line].forward = snewn(width, int);
+ term->post_bidi_cache[line].backward = snewn(width, int);
+
+ memcpy(term->pre_bidi_cache[line].chars, lbefore, size * TSIZE);
+ memcpy(term->post_bidi_cache[line].chars, lafter, size * TSIZE);
+ memset(term->post_bidi_cache[line].forward, 0, width * sizeof(int));
+ memset(term->post_bidi_cache[line].backward, 0, width * sizeof(int));
+
+ for (i = 0; i < width; i++) {
+ int p = wcTo[i].index;
+
+ assert(0 <= p && p < width);
+
+ term->post_bidi_cache[line].backward[i] = p;
+ term->post_bidi_cache[line].forward[p] = i;
+ }
+}
+
+/*
+ * Prepare the bidi information for a screen line. Returns the
+ * transformed list of termchars, or NULL if no transformation at
+ * all took place (because bidi is disabled). If return was
+ * non-NULL, auxiliary information such as the forward and reverse
+ * mappings of permutation position are available in
+ * term->post_bidi_cache[scr_y].*.
+ */
+static termchar *term_bidi_line(Terminal *term, struct termline *ldata,
+ int scr_y)
+{
+ termchar *lchars;
+ int it;
+
+ /* Do Arabic shaping and bidi. */
+ if(!term->cfg.bidi || !term->cfg.arabicshaping) {
+
+ if (!term_bidi_cache_hit(term, scr_y, ldata->chars, term->cols)) {
+
+ if (term->wcFromTo_size < term->cols) {
+ term->wcFromTo_size = term->cols;
+ term->wcFrom = sresize(term->wcFrom, term->wcFromTo_size,
+ bidi_char);
+ term->wcTo = sresize(term->wcTo, term->wcFromTo_size,
+ bidi_char);
+ }
+
+ for(it=0; it<term->cols ; it++)
+ {
+ unsigned long uc = (ldata->chars[it].chr);
+
+ switch (uc & CSET_MASK) {
+ case CSET_LINEDRW:
+ if (!term->cfg.rawcnp) {
+ uc = term->ucsdata->unitab_xterm[uc & 0xFF];
+ break;
+ }
+ case CSET_ASCII:
+ uc = term->ucsdata->unitab_line[uc & 0xFF];
+ break;
+ case CSET_SCOACS:
+ uc = term->ucsdata->unitab_scoacs[uc&0xFF];
+ break;
+ }
+ switch (uc & CSET_MASK) {
+ case CSET_ACP:
+ uc = term->ucsdata->unitab_font[uc & 0xFF];
+ break;
+ case CSET_OEMCP:
+ uc = term->ucsdata->unitab_oemcp[uc & 0xFF];
+ break;
+ }
+
+ term->wcFrom[it].origwc = term->wcFrom[it].wc =
+ (wchar_t)uc;
+ term->wcFrom[it].index = it;
+ }