/**
* gsf_vba_inflate:
* @input: stream to read from
* @offset: offset into it for start byte of compressed stream
* @size: size of the returned array
* @add_null_terminator: whenever add or not null at the end of array
*
* Decompresses VBA stream.
*
* Return value: A pointer to guint8 array
**/
guint8 *
gsf_vba_inflate (GsfInput *input, gsf_off_t offset, int *size, gboolean add_null_terminator)
{
guint8 sig;
GByteArray *res;
gsf_off_t length;
res = g_byte_array_new();
gsf_input_read (input, 1, &sig);
if (1 != sig) /* should start with 0x01 */
return NULL;
offset++;
length = gsf_input_size (input);
while (offset < length) {
GsfInput *chunk;
guint16 chunk_hdr;
guint8 const *tmp;
tmp = gsf_input_read (input, 2, NULL);
if (!tmp)
break;
chunk_hdr = GSF_LE_GET_GUINT16 (tmp);
offset += 2;
if (0xB000 == (chunk_hdr&0xF000) && (chunk_hdr&0xFFF) > 0 && (length - offset < 4094)){
if (length < offset + (chunk_hdr&0xFFF))
break;
chunk = gsf_input_proxy_new_section (input, offset, (gsf_off_t) (chunk_hdr&0xFFF) + 1);
offset += (chunk_hdr&0xFFF) + 1;
} else {
if (length < offset + 4094){
chunk = gsf_input_proxy_new_section (input, offset, length-offset);
offset = length;
} else {
chunk = gsf_input_proxy_new_section (input, offset, 4094);
offset += 4094;
}
}
if (chunk) {
GByteArray *tmpres = gsf_msole_inflate (chunk, 0);
gsf_input_seek (input, offset, G_SEEK_CUR);
g_byte_array_append (res, tmpres->data, tmpres->len);
g_byte_array_free (tmpres, TRUE);
g_object_unref (chunk);
}
}
if (res == NULL)
return NULL;
if (add_null_terminator)
g_byte_array_append (res, "", 1);
*size = res->len;
return g_byte_array_free (res, FALSE);
}
static GsfInput *
gsf_infile_tar_child_by_index (GsfInfile *infile, int target, GError **err)
{
GsfInfileTar *tar = GSF_INFILE_TAR (infile);
const TarChild *c;
if (err)
*err = NULL;
if (target < 0 || (unsigned)target >= tar->children->len)
return NULL;
c = &g_array_index (tar->children, TarChild, target);
if (c->dir)
return g_object_ref (c->dir);
else {
GsfInput *input = gsf_input_proxy_new_section (tar->source,
c->offset,
c->length);
gsf_input_set_name (input, c->name);
return input;
}
}