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https://github.com/micropython/micropython.git
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c3a18d74eb
This commit implements a small subset of the CPython `marshal` module. It implements `marshal.dumps()` and `marshal.loads()`, but only supports (un)marshalling code objects at this stage. The semantics match CPython, except that the actual marshalled bytes is not compatible with CPython's marshalled bytes. The module is enabled at the everything level (only on the unix coverage build at this stage). Signed-off-by: Damien George <damien@micropython.org>
89 lines
3.4 KiB
C
89 lines
3.4 KiB
C
/*
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* This file is part of the MicroPython project, http://micropython.org/
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*
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* The MIT License (MIT)
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*
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* Copyright (c) 2025 Damien P. George
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*
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*/
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#include "py/objcode.h"
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#include "py/objfun.h"
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#include "py/persistentcode.h"
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#include "py/runtime.h"
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#if MICROPY_PY_MARSHAL
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static mp_obj_t marshal_dumps(mp_obj_t value_in) {
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if (mp_obj_is_type(value_in, &mp_type_code)) {
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mp_obj_code_t *code = MP_OBJ_TO_PTR(value_in);
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const void *proto_fun = mp_code_get_proto_fun(code);
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const uint8_t *bytecode;
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if (mp_proto_fun_is_bytecode(proto_fun)) {
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bytecode = proto_fun;
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} else {
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const mp_raw_code_t *rc = proto_fun;
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if (!(rc->kind == MP_CODE_BYTECODE && rc->children == NULL)) {
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mp_raise_ValueError(MP_ERROR_TEXT("function must be bytecode with no children"));
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}
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bytecode = rc->fun_data;
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}
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return mp_raw_code_save_fun_to_bytes(mp_code_get_constants(code), bytecode);
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} else {
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mp_raise_ValueError(MP_ERROR_TEXT("unmarshallable object"));
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}
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}
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static MP_DEFINE_CONST_FUN_OBJ_1(marshal_dumps_obj, marshal_dumps);
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static mp_obj_t marshal_loads(mp_obj_t data_in) {
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mp_buffer_info_t bufinfo;
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mp_get_buffer_raise(data_in, &bufinfo, MP_BUFFER_READ);
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mp_module_context_t ctx;
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ctx.module.globals = mp_globals_get();
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mp_compiled_module_t cm = { .context = &ctx };
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mp_raw_code_load_mem(bufinfo.buf, bufinfo.len, &cm);
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#if MICROPY_PY_BUILTINS_CODE <= MICROPY_PY_BUILTINS_CODE_BASIC
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return mp_obj_new_code(ctx.constants, cm.rc);
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#else
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mp_module_context_t *ctx_ptr = m_new_obj(mp_module_context_t);
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*ctx_ptr = ctx;
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return mp_obj_new_code(ctx_ptr, cm.rc, true);
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#endif
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}
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static MP_DEFINE_CONST_FUN_OBJ_1(marshal_loads_obj, marshal_loads);
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static const mp_rom_map_elem_t mod_marshal_globals_table[] = {
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{ MP_ROM_QSTR(MP_QSTR___name__), MP_ROM_QSTR(MP_QSTR_marshal) },
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{ MP_ROM_QSTR(MP_QSTR_dumps), MP_ROM_PTR(&marshal_dumps_obj) },
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{ MP_ROM_QSTR(MP_QSTR_loads), MP_ROM_PTR(&marshal_loads_obj) },
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};
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static MP_DEFINE_CONST_DICT(mod_marshal_globals, mod_marshal_globals_table);
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const mp_obj_module_t mp_module_marshal = {
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.base = { &mp_type_module },
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.globals = (mp_obj_dict_t *)&mod_marshal_globals,
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};
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MP_REGISTER_MODULE(MP_QSTR_marshal, mp_module_marshal);
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#endif // MICROPY_PY_MARSHAL
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