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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 <unistd.h>
#include <string.h>
#include <time.h>
#include <sys/time.h>
#include <math.h>
#include "mpconfig.h"
#include "misc.h"
#include "qstr.h"
#include "obj.h"
#include "runtime.h"
#if MICROPY_PY_ZLIBD
#include "miniz/tinfl.c"
#if 0 // print debugging info
#define DEBUG_printf DEBUG_printf
#else // don't print debugging info
#define DEBUG_printf(...) (void)0
#endif
STATIC mp_obj_t mod_zlib_decompress(uint n_args, mp_obj_t *args) {
mp_obj_t data = args[0];
mp_buffer_info_t bufinfo;
mp_get_buffer_raise(data, &bufinfo, MP_BUFFER_READ);
tinfl_decompressor *decomp = m_new_obj(tinfl_decompressor);
tinfl_init(decomp);
DEBUG_printf("sizeof(tinfl_decompressor)=%d\n", sizeof(tinfl_decompressor));
byte *out = m_new(byte, bufinfo.len);
size_t out_len = bufinfo.len;
size_t in_buf_ofs = 0, dst_buf_ofs = 0;
size_t dst_buf_sz = bufinfo.len;
while (1) {
size_t in_buf_sz = bufinfo.len - in_buf_ofs;
DEBUG_printf("tinfl in: in_ofs=%d in_sz=%d dst_ofs=%d, dst_sz=%d\n", in_buf_ofs, in_buf_sz, dst_buf_ofs, dst_buf_sz);
tinfl_status st = tinfl_decompress(decomp,
bufinfo.buf + in_buf_ofs, &in_buf_sz,
out, out + dst_buf_ofs, &dst_buf_sz,
TINFL_FLAG_USING_NON_WRAPPING_OUTPUT_BUF | TINFL_FLAG_PARSE_ZLIB_HEADER);
DEBUG_printf("tinfl out: st=%d, in_sz=%d, out_sz=%d\n", st, in_buf_sz, dst_buf_sz);
in_buf_ofs += in_buf_sz;
dst_buf_ofs += dst_buf_sz;
if (st != TINFL_STATUS_HAS_MORE_OUTPUT) {
break;
}
out = m_renew(byte, out, out_len, dst_buf_ofs + 256);
out_len = dst_buf_ofs + 256;
dst_buf_sz = out_len - dst_buf_ofs;
}
m_del_obj(tinfl_decompressor, decomp);
return mp_obj_new_bytearray_by_ref(dst_buf_ofs, out);
}
STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(mod_zlib_decompress_obj, 1, 3, mod_zlib_decompress);
STATIC const mp_map_elem_t mp_module_zlib_globals_table[] = {
{ MP_OBJ_NEW_QSTR(MP_QSTR___name__), MP_OBJ_NEW_QSTR(MP_QSTR_zlibd) },
{ MP_OBJ_NEW_QSTR(MP_QSTR_decompress), (mp_obj_t)&mod_zlib_decompress_obj },
};
STATIC const mp_obj_dict_t mp_module_zlib_globals = {
.base = {&mp_type_dict},
.map = {
.all_keys_are_qstrs = 1,
.table_is_fixed_array = 1,
.used = MP_ARRAY_SIZE(mp_module_zlib_globals_table),
.alloc = MP_ARRAY_SIZE(mp_module_zlib_globals_table),
.table = (mp_map_elem_t*)mp_module_zlib_globals_table,
},
};
const mp_obj_module_t mp_module_zlibd = {
.base = { &mp_type_module },
.name = MP_QSTR_zlibd,
.globals = (mp_obj_dict_t*)&mp_module_zlib_globals,
};
#endif //MICROPY_PY_ZLIBD
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