static Packer* try_unpack(Packer *p, void *user)
{
if (p == NULL)
return NULL;
InputFile *f = (InputFile *) user;
p->assertPacker();
try {
p->initPackHeader();
f->seek(0,SEEK_SET);
int r = p->canUnpack();
if (r > 0)
{
f->seek(0,SEEK_SET);
return p;
}
if (r < 0)
{
// FIXME - could stop testing all other unpackers at this time
// see canUnpack() in packer.h
}
} catch (const IOException&) {
} catch (...) {
delete p;
throw;
}
delete p;
return NULL;
}
static Packer* try_pack(Packer *p, void *user)
{
if (p == NULL)
return NULL;
InputFile *f = (InputFile *) user;
p->assertPacker();
try {
p->initPackHeader();
f->seek(0,SEEK_SET);
if (p->canPack())
{
if (opt->cmd == CMD_COMPRESS)
p->updatePackHeader();
f->seek(0,SEEK_SET);
return p;
}
} catch (const IOException&) {
} catch (...) {
delete p;
throw;
}
delete p;
return NULL;
}
