107 lines
3.8 KiB
C
107 lines
3.8 KiB
C
/*
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* This file is part of the Micro Python 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) 2014 Paul Sokolovsky
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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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#include <stdio.h>
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#include "py/nlr.h"
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#include "py/runtime.h"
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#if MICROPY_PY_UZLIB
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#include "uzlib/tinf.h"
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#if 0 // print debugging info
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#define DEBUG_printf DEBUG_printf
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#else // don't print debugging info
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#define DEBUG_printf(...) (void)0
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#endif
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STATIC int mod_uzlib_grow_buf(TINF_DATA *d, unsigned alloc_req) {
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if (alloc_req < 256) {
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alloc_req = 256;
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}
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DEBUG_printf("uzlib: Resizing buffer to " UINT_FMT " bytes\n", d->destSize + alloc_req);
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d->destStart = m_renew(byte, d->destStart, d->destSize, d->destSize + alloc_req);
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d->destSize += alloc_req;
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return 0;
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}
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STATIC mp_obj_t mod_uzlib_decompress(mp_uint_t n_args, const mp_obj_t *args) {
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(void)n_args;
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mp_obj_t data = args[0];
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mp_buffer_info_t bufinfo;
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mp_get_buffer_raise(data, &bufinfo, MP_BUFFER_READ);
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TINF_DATA *decomp = m_new_obj(TINF_DATA);
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DEBUG_printf("sizeof(TINF_DATA)=" UINT_FMT "\n", sizeof(*decomp));
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decomp->destSize = (bufinfo.len + 15) & ~15;
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decomp->destStart = m_new(byte, decomp->destSize);
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DEBUG_printf("uzlib: Initial out buffer: " UINT_FMT " bytes\n", decomp->destSize);
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decomp->destGrow = mod_uzlib_grow_buf;
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decomp->source = bufinfo.buf;
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int st;
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if (n_args > 1 && MP_OBJ_SMALL_INT_VALUE(args[1]) < 0) {
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st = tinf_uncompress_dyn(decomp);
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} else {
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st = tinf_zlib_uncompress_dyn(decomp, bufinfo.len);
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}
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if (st != 0) {
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nlr_raise(mp_obj_new_exception_arg1(&mp_type_ValueError, MP_OBJ_NEW_SMALL_INT(st)));
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}
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mp_uint_t final_sz = decomp->dest - decomp->destStart;
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DEBUG_printf("uzlib: Resizing from " UINT_FMT " to final size: " UINT_FMT " bytes\n", decomp->destSize, final_sz);
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decomp->destStart = (byte*)m_renew(byte, decomp->destStart, decomp->destSize, final_sz);
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mp_obj_t res = mp_obj_new_bytearray_by_ref(final_sz, decomp->destStart);
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m_del_obj(TINF_DATA, decomp);
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return res;
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}
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STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(mod_uzlib_decompress_obj, 1, 3, mod_uzlib_decompress);
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STATIC const mp_rom_map_elem_t mp_module_uzlib_globals_table[] = {
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{ MP_ROM_QSTR(MP_QSTR___name__), MP_ROM_QSTR(MP_QSTR_uzlib) },
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{ MP_ROM_QSTR(MP_QSTR_decompress), MP_ROM_PTR(&mod_uzlib_decompress_obj) },
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};
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STATIC MP_DEFINE_CONST_DICT(mp_module_uzlib_globals, mp_module_uzlib_globals_table);
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const mp_obj_module_t mp_module_uzlib = {
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.base = { &mp_type_module },
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.name = MP_QSTR_uzlib,
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.globals = (mp_obj_dict_t*)&mp_module_uzlib_globals,
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};
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// Source files #include'd here to make sure they're compiled in
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// only if module is enabled by config setting.
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#include "uzlib/tinflate.c"
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#include "uzlib/tinfzlib.c"
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#include "uzlib/adler32.c"
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#endif // MICROPY_PY_UZLIB
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