Commit 426bb58b authored by Paul Sokolovsky's avatar Paul Sokolovsky
Browse files

moduzlib: New zlib-like module, based on uzlib.

parent 1ef2348d
/*
* 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 "nlr.h"
#include "obj.h"
#include "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(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);
TINF_DATA *decomp = m_new_obj(TINF_DATA);
DEBUG_printf("sizeof(TINF_DATA)=" UINT_FMT "\n", sizeof(*decomp));
decomp->destStart = m_new(byte, bufinfo.len);
decomp->destSize = bufinfo.len;
decomp->destGrow = mod_uzlib_grow_buf;
decomp->source = bufinfo.buf;
int 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_obj_t res = mp_obj_new_bytearray_by_ref(decomp->dest - decomp->destStart, 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_map_elem_t mp_module_uzlib_globals_table[] = {
{ MP_OBJ_NEW_QSTR(MP_QSTR___name__), MP_OBJ_NEW_QSTR(MP_QSTR_uzlib) },
{ MP_OBJ_NEW_QSTR(MP_QSTR_decompress), (mp_obj_t)&mod_uzlib_decompress_obj },
};
STATIC const mp_obj_dict_t mp_module_uzlib_globals = {
.base = {&mp_type_dict},
.map = {
.all_keys_are_qstrs = 1,
.table_is_fixed_array = 1,
.used = MP_ARRAY_SIZE(mp_module_uzlib_globals_table),
.alloc = MP_ARRAY_SIZE(mp_module_uzlib_globals_table),
.table = (mp_map_elem_t*)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
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