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 parse-bytecode

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moduzlib.c

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/*

* This file is part of the Micro Python project, http://micropython.org/

*

* The MIT License (MIT)

*

* Copyright (c) 2014 Paul Sokolovsky

*

* Permission is hereby granted, free of charge, to any person obtaining a copy

* of this software and associated documentation files (the "Software"), to deal

* in the Software without restriction, including without limitation the rights

* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell

* copies of the Software, and to permit persons to whom the Software is

* furnished to do so, subject to the following conditions:

*

* The above copyright notice and this permission notice shall be included in

* all copies or substantial portions of the Software.

*

* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR

* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE

* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER

* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,

* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN

* THE SOFTWARE.

*/

#include <stdio.h>

#include "py/nlr.h"

#include "py/runtime.h"

#if MICROPY_PY_UZLIB

#include "uzlib/tinf.h"

#if 0 // print debugging info

#define DEBUG_printf DEBUG_printf

#else // don't print debugging info

#define DEBUG_printf(...) (void)0

#endif

STATIC int mod_uzlib_grow_buf(TINF_DATA *d, unsigned alloc_req) {

if (alloc_req < 256) {

alloc_req = 256;

}

DEBUG_printf("uzlib: Resizing buffer to " UINT_FMT " bytes\n", d->destSize + alloc_req);

d->destStart = m_renew(byte, d->destStart, d->destSize, d->destSize + alloc_req);

d->destSize += alloc_req;

return 0;

}

STATIC mp_obj_t mod_uzlib_decompress(size_t n_args, const mp_obj_t *args) {

(void)n_args;

mp_obj_t data = args[0];

mp_buffer_info_t bufinfo;

mp_get_buffer_raise(data, &bufinfo, MP_BUFFER_READ);

TINF_DATA *decomp = m_new_obj(TINF_DATA);

DEBUG_printf("sizeof(TINF_DATA)=" UINT_FMT "\n", sizeof(*decomp));

decomp->destSize = (bufinfo.len + 15) & ~15;

decomp->destStart = m_new(byte, decomp->destSize);

DEBUG_printf("uzlib: Initial out buffer: " UINT_FMT " bytes\n", decomp->destSize);

decomp->destGrow = mod_uzlib_grow_buf;

decomp->source = bufinfo.buf;

int st;

if (n_args > 1 && MP_OBJ_SMALL_INT_VALUE(args[1]) < 0) {

st = tinf_uncompress_dyn(decomp);

} else {

st = tinf_zlib_uncompress_dyn(decomp, bufinfo.len);

}

if (st != 0) {

nlr_raise(mp_obj_new_exception_arg1(&mp_type_ValueError, MP_OBJ_NEW_SMALL_INT(st)));

}

mp_uint_t final_sz = decomp->dest - decomp->destStart;

DEBUG_printf("uzlib: Resizing from " UINT_FMT " to final size: " UINT_FMT " bytes\n", decomp->destSize, final_sz);

decomp->destStart = (byte*)m_renew(byte, decomp->destStart, decomp->destSize, final_sz);

mp_obj_t res = mp_obj_new_bytearray_by_ref(final_sz, decomp->destStart);

m_del_obj(TINF_DATA, decomp);

return res;

}

STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(mod_uzlib_decompress_obj, 1, 3, mod_uzlib_decompress);

STATIC const mp_rom_map_elem_t mp_module_uzlib_globals_table[] = {

{ MP_ROM_QSTR(MP_QSTR___name__), MP_ROM_QSTR(MP_QSTR_uzlib) },

{ MP_ROM_QSTR(MP_QSTR_decompress), MP_ROM_PTR(&mod_uzlib_decompress_obj) },

};

STATIC MP_DEFINE_CONST_DICT(mp_module_uzlib_globals, mp_module_uzlib_globals_table);

const mp_obj_module_t mp_module_uzlib = {

.base = { &mp_type_module },

.name = MP_QSTR_uzlib,

.globals = (mp_obj_dict_t*)&mp_module_uzlib_globals,

};

// Source files #include'd here to make sure they're compiled in

// only if module is enabled by config setting.

#include "uzlib/tinflate.c"

#include "uzlib/tinfzlib.c"

#include "uzlib/adler32.c"

#endif // MICROPY_PY_UZLIB