void tag_processor_id3v2::g_remove_ex(tag_write_callback & p_callback,const service_ptr_t<file> & p_file,t_uint64 & p_size_removed,abort_callback & p_abort)
{
p_file->ensure_seekable();
t_filesize len;
len = p_file->get_size(p_abort);
if (len == filesize_invalid) throw exception_io_no_length();
p_file->seek(0,p_abort);
t_uint64 offset;
g_multiskip(p_file,offset,p_abort);
if (offset>0 && offset<len)
{
len-=offset;
service_ptr_t<file> temp;
if (p_callback.open_temp_file(temp,p_abort)) {
file::g_transfer_object(p_file,temp,len,p_abort);
} else {
if (len > 16*1024*1024) filesystem::g_open_temp(temp,p_abort);
else filesystem::g_open_tempmem(temp,p_abort);
file::g_transfer_object(p_file,temp,len,p_abort);
p_file->seek(0,p_abort);
p_file->set_eof(p_abort);
temp->seek(0,p_abort);
file::g_transfer_object(temp,p_file,len,p_abort);
}
}
p_size_removed = offset;
}
void file::g_transfer_object(service_ptr_t<file> p_src,service_ptr_t<file> p_dst,t_filesize p_bytes,abort_callback & p_abort) {
if (p_bytes > 1024) /* don't bother on small objects */
{
t_filesize oldsize = p_dst->get_size(p_abort);
if (oldsize != filesize_invalid) {
t_filesize newpos = p_dst->get_position(p_abort) + p_bytes;
if (newpos > oldsize) p_dst->resize(newpos ,p_abort);
}
}
g_transfer_object(pfc::implicit_cast<stream_reader*>(p_src.get_ptr()),pfc::implicit_cast<stream_writer*>(p_dst.get_ptr()),p_bytes,p_abort);
}
bool load_feature_list_from_json_file(pfc::list_base_t<feature_handle_ptr> &p_list, const service_ptr_t<file> &p_file, abort_callback &p_abort)
{
t_filesize size = p_file->get_size(p_abort);
pfc::string8 json;
{
pfc::string_buffer buffer(json, size);
p_file->read_object(buffer, size, p_abort);
}
return load_feature_list_from_json_string(p_list, json);
}
static void process_fullbuffer(service_ptr_t<file> & p_file,const char * p_path,t_filesize p_fullbuffer,abort_callback & p_abort) {
if (p_fullbuffer > 0) {
if (p_file.is_empty()) {
service_ptr_t<filesystem> fs;
if (filesystem::g_get_interface(fs,p_path)) {
fs->open(p_file,p_path,filesystem::open_mode_read,p_abort);
}
}
if (p_file.is_valid()) {
t_filesize size = p_file->get_size(p_abort);
if (size != filesize_invalid && size <= p_fullbuffer) {
service_ptr_t<file> l_file_buffered;
if (reader_membuffer_mirror::g_create(l_file_buffered,p_file,p_abort)) {
p_file = l_file_buffered;
}
}
}
}
}
void read_v2(const service_ptr_t<file> & p_file,abort_callback & p_abort,pfc::string_base & p_out,bool & is_utf8, bool forceUTF8) {
p_out.reset();
p_file->reopen( p_abort );
pfc::array_t<char> mem;
t_filesize size64;
size64 = p_file->get_size(p_abort);
if (size64 == filesize_invalid)//typically HTTP
{
pfc::string8 ansitemp;
t_size done;
enum { delta = 1024 * 64, max = 1024 * 512 };
if ( forceUTF8 ) {
is_utf8 = true;
} else {
is_utf8 = false;
char temp[3];
done = p_file->read(temp, 3, p_abort);
if (done != 3)
{
if (done > 0) p_out = pfc::stringcvt::string_utf8_from_ansi(temp, done);
return;
}
if (!memcmp(utf8_header, temp, 3)) is_utf8 = true;
else ansitemp.add_string(temp, 3);
}
mem.set_size(delta);
for(;;)
{
done = p_file->read(mem.get_ptr(),delta,p_abort);
if (done > 0)
{
if (is_utf8) p_out.add_string(mem.get_ptr(),done);
else ansitemp.add_string(mem.get_ptr(),done);
}
if (done < delta) break;
}
if (!is_utf8)
{
p_out = pfc::stringcvt::string_utf8_from_ansi(ansitemp);
}
return;
}
else
{
if (size64>1024*1024*128) throw exception_io_data();//hard limit
t_size size = pfc::downcast_guarded<t_size>(size64);
mem.set_size(size+1);
char * asdf = mem.get_ptr();
p_file->read_object(asdf,size,p_abort);
asdf[size]=0;
if ( forceUTF8 ) {
is_utf8 = true;
p_out = asdf;
} else if (size>3 && !memcmp(utf8_header,asdf,3)) {
is_utf8 = true;
p_out.add_string(asdf+3);
} else {
is_utf8 = false;
p_out = pfc::stringcvt::string_utf8_from_ansi(asdf);
}
return;
}
}
