int
tail_write (const Tail *t, FILE *file)
{
TrieIndex i;
if (!file_write_int32 (file, TAIL_SIGNATURE) ||
!file_write_int32 (file, t->first_free) ||
!file_write_int32 (file, t->num_tails))
{
return -1;
}
for (i = 0; i < t->num_tails; i++) {
int16 length;
if (!file_write_int32 (file, t->tails[i].next_free) ||
!file_write_int32 (file, t->tails[i].data))
{
return -1;
}
length = t->tails[i].suffix ? strlen ((const char *)t->tails[i].suffix)
: 0;
if (!file_write_int16 (file, length))
return -1;
if (length > 0 &&
!file_write_chars (file, (char *)t->tails[i].suffix, length))
{
return -1;
}
}
return 0;
}
int
tail_save (Tail *t)
{
TrieIndex i;
if (!t->is_dirty)
return 0;
rewind (t->file);
if (!file_write_int16 (t->file, TAIL_SIGNATURE) ||
!file_write_int16 (t->file, t->first_free) ||
!file_write_int16 (t->file, t->num_tails))
{
return -1;
}
for (i = 0; i < t->num_tails; i++) {
int8 length;
if (!file_write_int16 (t->file, t->tails[i].next_free) ||
!file_write_int16 (t->file, t->tails[i].data))
{
return -1;
}
length = t->tails[i].suffix ? strlen ((const char *)t->tails[i].suffix)
: 0;
if (!file_write_int8 (t->file, length))
return -1;
if (length > 0 &&
!file_write_chars (t->file, (char *)t->tails[i].suffix, length))
{
return -1;
}
}
t->is_dirty = FALSE;
return 0;
}