+ /* determine splitting char... */
+ indxp = (short*) ((char*) p+DICT_bsize(p)-sizeof(short));
+ for (i = DICT_nodir (p); --i >= 0; --indxp)
+ {
+ if (*indxp > 0) /* tail string here! */
+ {
+ Dict_char dc;
+
+ memcpy (&dc, (char*) p + *indxp, sizeof(dc));
+ if (best_no < 0)
+ { /* first entry met */
+ best_char = prev_char = dc;
+ best_no = 1;
+ best_indxp = indxp;
+ }
+ else if (prev_char == dc)
+ { /* same char prefix. update */
+ if (++no_current > best_no)
+ { /* best entry so far */
+ best_no = no_current;
+ best_char = dc;
+ best_indxp = indxp;
+ }
+ }
+ else
+ { /* new char prefix. restore */
+ prev_char = dc;
+ no_current = 1;
+ }
+ }
+ }
+ if (best_no < 0) /* we didn't find any tail string entry at all! */
+ return -1;
+
+ j = best_indxp - (short*) p;
+ subptr = new_page (dict, ptr, &subp);
+ /* scan entries to see if there is a string with */
+ /* length 1. info_here indicates if such entry exist */
+ info_here = NULL;
+ for (i=0; i<best_no; i++, j++)
+ {
+ char *info, *info1;
+ int slen;
+ Dict_char dc;
+
+ info = (char*) p + ((short*) p)[j];
+ /* entry start */
+ memcpy (&dc, info, sizeof(dc));
+ assert (dc == best_char);
+ slen = 1+dict_strlen((Dict_char*) info);
+
+ assert (slen > 1);
+ if (slen == 2)
+ {
+ assert (!info_here);
+ info_here = info+slen*sizeof(Dict_char);
+ }
+ else
+ {
+ info1 = info+slen*sizeof(Dict_char); /* info start */
+ dict_ins (dict, (Dict_char*) (info+sizeof(Dict_char)),
+ subptr, *info1, info1+1);
+ dict_bf_readp (dict->dbf, ptr, &p);
+ }
+ }
+ /* now clean the page ... */
+ clean_page (dict, ptr, p, &best_char, subptr, info_here);
+ return 0;
+}
+
+static void clean_page (Dict dict, Dict_ptr ptr, void *p, Dict_char *out,
+ Dict_ptr subptr, char *userinfo)
+{
+ char *np = (char *) xmalloc (dict->head.page_size);
+ int i, slen, no = 0;
+ short *indxp1, *indxp2;
+ char *info1, *info2;
+
+ DICT_bsize(np) = dict->head.page_size;
+ indxp1 = (short*) ((char*) p+DICT_bsize(p)-sizeof(short));
+ indxp2 = (short*) ((char*) np+DICT_bsize(np));
+ info2 = (char*) np + DICT_infoffset;
+ for (i = DICT_nodir (p); --i >= 0; --indxp1)
+ {
+ if (*indxp1 > 0) /* tail string here! */
+ {
+ /* string (Dict_char *) DICT_EOS terminated */
+ /* unsigned char length of information */
+ /* char * information */
+
+ info1 = (char*) p + *indxp1;
+ if (out && memcmp (out, info1, sizeof(Dict_char)) == 0)
+ {
+ if (subptr == 0)
+ continue;
+ *--indxp2 = -(info2 - np);
+ memcpy (info2, &subptr, sizeof(Dict_ptr));
+ info2 += sizeof(Dict_ptr);
+ memcpy (info2, out, sizeof(Dict_char));
+ info2 += sizeof(Dict_char);
+ if (userinfo)
+ {
+ memcpy (info2, userinfo, *userinfo+1);
+ info2 += *userinfo + 1;
+ }
+ else
+ *info2++ = 0;
+ subptr = 0;
+ ++no;
+ continue;
+ }
+ *--indxp2 = info2 - np;
+ slen = (dict_strlen((Dict_char*) info1)+1)*sizeof(Dict_char);
+ memcpy (info2, info1, slen);
+ info1 += slen;
+ info2 += slen;
+ }
+ else
+ {
+ /* Dict_ptr subptr */
+ /* Dict_char sub char */
+ /* unsigned char length of information */
+ /* char * information */
+
+ assert (*indxp1 < 0);
+ *--indxp2 = -(info2 - np);
+ info1 = (char*) p - *indxp1;
+ memcpy (info2, info1, sizeof(Dict_ptr)+sizeof(Dict_char));
+ info1 += sizeof(Dict_ptr)+sizeof(Dict_char);
+ info2 += sizeof(Dict_ptr)+sizeof(Dict_char);
+ }
+ slen = *info1+1;
+ memcpy (info2, info1, slen);
+ info2 += slen;
+ ++no;
+ }
+#if 1
+ memcpy ((char*)p+DICT_infoffset,
+ (char*)np+DICT_infoffset,
+ info2 - ((char*)np+DICT_infoffset));
+ memcpy ((char*)p + ((char*)indxp2 - (char*)np),
+ indxp2,
+ ((char*) np+DICT_bsize(p)) - (char*)indxp2);
+#else
+ memcpy ((char*)p+DICT_infoffset, (char*)np+DICT_infoffset,
+ DICT_pagesize(dict)-DICT_infoffset);
+#endif
+ DICT_size(p) = info2 - np;
+ DICT_type(p) = 0;
+ DICT_nodir(p) = no;
+ xfree (np);
+ dict_bf_touch (dict->dbf, ptr);
+}
+
+
+
+/* return 0 if new */
+/* return 1 if before but change of info */
+/* return 2 if same as before */
+
+static int dict_ins (Dict dict, const Dict_char *str,
+ Dict_ptr ptr, int userlen, void *userinfo)
+{
+ int hi, lo, mid, slen, cmp = 1;
+ short *indxp;
+ char *info;
+ void *p;
+
+ dict_bf_readp (dict->dbf, ptr, &p);
+