101 lines
3.4 KiB
C
101 lines
3.4 KiB
C
/*
|
|
* This file is part of the MicroPython project, http://micropython.org/
|
|
*
|
|
* The MIT License (MIT)
|
|
*
|
|
* Copyright (c) 2022 Mark Komus
|
|
*
|
|
* 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 <stdint.h>
|
|
#include <assert.h>
|
|
#include <string.h>
|
|
|
|
#include "py/obj.h"
|
|
#include "py/runtime.h"
|
|
#include "py/stream.h"
|
|
#include "py/mperrno.h"
|
|
#include "py/builtin.h"
|
|
#include "py/objtuple.h"
|
|
#include "py/binary.h"
|
|
#include "py/parsenum.h"
|
|
|
|
#include "shared-bindings/zlib/__init__.h"
|
|
|
|
#define UZLIB_CONF_PARANOID_CHECKS (1)
|
|
#include "lib/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
|
|
|
|
mp_obj_t common_hal_zlib_decompress(mp_obj_t data, bool is_zlib) {
|
|
mp_buffer_info_t bufinfo;
|
|
mp_get_buffer_raise(data, &bufinfo, MP_BUFFER_READ);
|
|
|
|
TINF_DATA *decomp = m_new_obj(TINF_DATA);
|
|
memset(decomp, 0, sizeof(*decomp));
|
|
DEBUG_printf("sizeof(TINF_DATA)=" UINT_FMT "\n", sizeof(*decomp));
|
|
uzlib_uncompress_init(decomp, NULL, 0);
|
|
mp_uint_t dest_buf_size = (bufinfo.len + 15) & ~15;
|
|
byte *dest_buf = m_new(byte, dest_buf_size);
|
|
|
|
decomp->dest = dest_buf;
|
|
decomp->dest_limit = dest_buf + dest_buf_size;
|
|
DEBUG_printf("zlib: Initial out buffer: " UINT_FMT " bytes\n", decomp->destSize);
|
|
decomp->source = bufinfo.buf;
|
|
decomp->source_limit = (unsigned char *)bufinfo.buf + bufinfo.len;
|
|
int st;
|
|
|
|
if (is_zlib) {
|
|
st = uzlib_zlib_parse_header(decomp);
|
|
if (st < 0) {
|
|
goto error;
|
|
}
|
|
}
|
|
|
|
while (1) {
|
|
st = uzlib_uncompress_chksum(decomp);
|
|
if (st < 0) {
|
|
goto error;
|
|
}
|
|
if (st == TINF_DONE) {
|
|
break;
|
|
}
|
|
size_t offset = decomp->dest - dest_buf;
|
|
dest_buf = m_renew(byte, dest_buf, dest_buf_size, dest_buf_size + 256);
|
|
dest_buf_size += 256;
|
|
decomp->dest = dest_buf + offset;
|
|
decomp->dest_limit = dest_buf + offset + 256;
|
|
}
|
|
|
|
mp_uint_t final_sz = decomp->dest - dest_buf;
|
|
DEBUG_printf("zlib: Resizing from " UINT_FMT " to final size: " UINT_FMT " bytes\n", dest_buf_size, final_sz);
|
|
dest_buf = (byte *)m_renew(byte, dest_buf, dest_buf_size, final_sz);
|
|
mp_obj_t res = mp_obj_new_bytearray_by_ref(final_sz, dest_buf);
|
|
m_del_obj(TINF_DATA, decomp);
|
|
return res;
|
|
|
|
error:
|
|
mp_raise_type_arg(&mp_type_ValueError, MP_OBJ_NEW_SMALL_INT(st));
|
|
}
|