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#include <ATen/core/ivalue.h>
#include <caffe2/serialize/file_adapter.h>
#include <caffe2/serialize/inline_container.h>
#include <torch/csrc/jit/mobile/compatibility/backport.h>
#include <torch/csrc/jit/mobile/compatibility/backport_manager.h>
#include <torch/csrc/jit/mobile/compatibility/model_compatibility.h>
#include <string>
namespace torch::jit {
using caffe2::serialize::IStreamAdapter;
using caffe2::serialize::PyTorchStreamWriter;
const static BackportManager backportManager;
// Forward declare so that _backport_for_mobile() overloads can
// call this method directly.
bool _backport_for_mobile_impl(
std::istream& oss,
PyTorchStreamWriter& writer,
const int64_t to_version);
bool _backport_for_mobile(
std::istream& in,
std::ostream& out,
const int64_t to_version) {
auto writer_func = [&](const void* buf, size_t nbytes) -> size_t {
out.write(static_cast<const char*>(buf), nbytes);
return !out ? 0 : nbytes;
};
PyTorchStreamWriter writer(writer_func);
return _backport_for_mobile_impl(in, writer, to_version);
}
bool _backport_for_mobile(
std::istream& in,
const std::string& output_filename,
const int64_t to_version) {
PyTorchStreamWriter writer(output_filename);
return _backport_for_mobile_impl(in, writer, to_version);
}
bool _backport_for_mobile(
const std::string& input_filename,
std::ostream& out,
const int64_t to_version) {
std::ifstream file_stream;
std::unique_ptr<IStreamAdapter> istream_adapter;
file_stream.open(input_filename, std::ifstream::in | std::ifstream::binary);
if (!file_stream) {
TORCH_CHECK(false, "open file failed, file path: ", input_filename);
}
auto writer_func = [&](const void* buf, size_t nbytes) -> size_t {
out.write(static_cast<const char*>(buf), nbytes);
return !out ? 0 : nbytes;
};
PyTorchStreamWriter writer(writer_func);
return _backport_for_mobile_impl(file_stream, writer, to_version);
}
bool _backport_for_mobile(
const std::string& input_filename,
const std::string& output_filename,
const int64_t to_version) {
std::ifstream file_stream;
file_stream.open(input_filename, std::ifstream::in | std::ifstream::binary);
if (!file_stream) {
TORCH_CHECK(false, "open file failed, file path: ", input_filename);
}
PyTorchStreamWriter writer(output_filename);
return _backport_for_mobile_impl(file_stream, writer, to_version);
}
bool _backport_for_mobile_impl(
std::istream& oss,
PyTorchStreamWriter& writer,
const int64_t to_version) {
if (!backportManager.hasBytecodeBackportFunction(to_version + 1)) {
return false;
}
oss.seekg(0, oss.beg);
auto from_version = _get_model_bytecode_version(oss);
return backportManager.backport(oss, writer, from_version, to_version);
}
} // namespace torch::jit
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