+ if (totalsize - indexbuild_realsize(ib) < delta) {
+ const void *oldfile = mappedfile;
+ ptrdiff_t diff;
+
+ /*
+ * Unmap the file, grow it, and remap it.
+ */
+ munmap(mappedfile, totalsize);
+
+ totalsize += delta;
+ totalsize += totalsize / 10;
+
+ if (lseek(fd, totalsize-1, SEEK_SET) < 0) {
+ perror(PNAME ": lseek");
+ return 1;
+ }
+ if (write(fd, "\0", 1) < 1) {
+ perror(PNAME ": write");
+ return 1;
+ }
+
+ mappedfile = mmap(NULL, totalsize, PROT_READ|PROT_WRITE,MAP_SHARED, fd, 0);
+ if (!mappedfile) {
+ perror(PNAME ": mmap");
+ return 1;
+ }
+
+ indexbuild_rebase(ib, mappedfile);
+ triewalk_rebase(tw, mappedfile);
+ diff = (const unsigned char *)mappedfile -
+ (const unsigned char *)oldfile;
+ if (prevtf)
+ prevtf = (const struct trie_file *)
+ (((const unsigned char *)prevtf) + diff);
+ if (tf)
+ tf = (const struct trie_file *)
+ (((const unsigned char *)tf) + diff);
+ }
+