e6c290c3d1
For better abstraction for users of this API. Signed-off-by: Jim Mussared <jim.mussared@gmail.com>
114 lines
3.5 KiB
C
114 lines
3.5 KiB
C
/*
|
|
* This file is part of the MicroPython project, http://micropython.org/
|
|
*
|
|
* The MIT License (MIT)
|
|
*
|
|
* Copyright (c) 2019-2020 Damien P. George
|
|
*
|
|
* 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 <string.h>
|
|
|
|
#include "py/mphal.h"
|
|
#include "lib/uzlib/uzlib.h"
|
|
#include "gzstream.h"
|
|
#include "mboot.h"
|
|
|
|
#if MBOOT_FSLOAD || MBOOT_ENABLE_PACKING
|
|
|
|
#define DICT_SIZE (1 << 15)
|
|
|
|
typedef struct _gz_stream_t {
|
|
void *stream_data;
|
|
stream_read_t stream_read;
|
|
uzlib_uncomp_t decomp;
|
|
uint8_t buf[512];
|
|
uint8_t dict[DICT_SIZE];
|
|
} gz_stream_t;
|
|
|
|
static gz_stream_t gz_stream SECTION_NOZERO_BSS;
|
|
|
|
static int gz_stream_read_src(void *data) {
|
|
uzlib_uncomp_t *decomp = data;
|
|
int n = gz_stream.stream_read(gz_stream.stream_data, gz_stream.buf, sizeof(gz_stream.buf));
|
|
if (n < 0) {
|
|
// Stream error
|
|
return -1;
|
|
}
|
|
if (n == 0) {
|
|
// No data / EOF
|
|
return -1;
|
|
}
|
|
|
|
decomp->source = gz_stream.buf + 1;
|
|
decomp->source_limit = gz_stream.buf + n;
|
|
return gz_stream.buf[0];
|
|
}
|
|
|
|
int gz_stream_init_from_raw_data(const uint8_t *data, size_t len) {
|
|
memset(&gz_stream.decomp, 0, sizeof(gz_stream.decomp));
|
|
gz_stream.decomp.source = data;
|
|
gz_stream.decomp.source_limit = data + len;
|
|
|
|
uzlib_uncompress_init(&gz_stream.decomp, gz_stream.dict, DICT_SIZE);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int gz_stream_init_from_stream(void *stream_data, stream_read_t stream_read) {
|
|
gz_stream.stream_data = stream_data;
|
|
gz_stream.stream_read = stream_read;
|
|
|
|
memset(&gz_stream.decomp, 0, sizeof(gz_stream.decomp));
|
|
gz_stream.decomp.source_read_data = &gz_stream.decomp;
|
|
gz_stream.decomp.source_read_cb = gz_stream_read_src;
|
|
|
|
int header_wbits;
|
|
int st = uzlib_parse_zlib_gzip_header(&gz_stream.decomp, &header_wbits);
|
|
if (st != UZLIB_HEADER_GZIP) {
|
|
return -MBOOT_ERRNO_GUNZIP_FAILED;
|
|
}
|
|
|
|
uzlib_uncompress_init(&gz_stream.decomp, gz_stream.dict, DICT_SIZE);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int gz_stream_read(size_t len, uint8_t *buf) {
|
|
if (gz_stream.decomp.source == NULL && gz_stream.decomp.source_read_cb == NULL) {
|
|
// End of stream.
|
|
return 0;
|
|
}
|
|
gz_stream.decomp.dest = buf;
|
|
gz_stream.decomp.dest_limit = buf + len;
|
|
int st = uzlib_uncompress_chksum(&gz_stream.decomp);
|
|
if (st < 0) {
|
|
return st;
|
|
}
|
|
if (st == UZLIB_DONE) {
|
|
// Indicate end-of-stream for subsequent calls.
|
|
gz_stream.decomp.source = NULL;
|
|
gz_stream.decomp.source_read_cb = NULL;
|
|
}
|
|
return gz_stream.decomp.dest - buf;
|
|
}
|
|
|
|
#endif // MBOOT_FSLOAD || MBOOT_ENABLE_PACKING
|