]>
git.ipfire.org Git - thirdparty/u-boot.git/blob - lib/gunzip.c
2 * (C) Copyright 2000-2006
3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
5 * SPDX-License-Identifier: GPL-2.0+
15 #include <u-boot/zlib.h>
18 #define HEADER0 '\x1f'
19 #define HEADER1 '\x8b'
20 #define ZALLOC_ALIGNMENT 16
28 void *gzalloc(void *x
, unsigned items
, unsigned size
)
33 size
= (size
+ ZALLOC_ALIGNMENT
- 1) & ~(ZALLOC_ALIGNMENT
- 1);
40 void gzfree(void *x
, void *addr
, unsigned nb
)
45 int gunzip(void *dst
, int dstlen
, unsigned char *src
, unsigned long *lenp
)
52 if (src
[2] != DEFLATED
|| (flags
& RESERVED
) != 0) {
53 puts ("Error: Bad gzipped data\n");
56 if ((flags
& EXTRA_FIELD
) != 0)
57 i
= 12 + src
[10] + (src
[11] << 8);
58 if ((flags
& ORIG_NAME
) != 0)
61 if ((flags
& COMMENT
) != 0)
64 if ((flags
& HEAD_CRC
) != 0)
67 puts ("Error: gunzip out of data in header\n");
71 return zunzip(dst
, dstlen
, src
, lenp
, 1, i
);
74 #ifdef CONFIG_CMD_UNZIP
76 void gzwrite_progress_init(u64 expectedsize
)
82 void gzwrite_progress(int iteration
,
86 if (0 == (iteration
& 3))
87 printf("%llu/%llu\r", bytes_written
, total_bytes
);
91 void gzwrite_progress_finish(int returnval
,
98 printf("\n\t%llu bytes, crc 0x%08x\n",
99 total_bytes
, calculated_crc
);
101 printf("\n\tuncompressed %llu of %llu\n"
102 "\tcrcs == 0x%08x/0x%08x\n",
103 bytes_written
, total_bytes
,
104 expected_crc
, calculated_crc
);
108 int gzwrite(unsigned char *src
, int len
,
109 struct blk_desc
*dev
,
110 unsigned long szwritebuf
,
117 unsigned char *writebuf
;
120 lbaint_t blksperbuf
, outblock
;
126 (szwritebuf
% dev
->blksz
) ||
127 (szwritebuf
< dev
->blksz
)) {
128 printf("%s: size %lu not a multiple of %lu\n",
129 __func__
, szwritebuf
, dev
->blksz
);
133 if (startoffs
& (dev
->blksz
-1)) {
134 printf("%s: start offset %llu not a multiple of %lu\n",
135 __func__
, startoffs
, dev
->blksz
);
139 blksperbuf
= szwritebuf
/ dev
->blksz
;
140 outblock
= lldiv(startoffs
, dev
->blksz
);
145 if (src
[2] != DEFLATED
|| (flags
& RESERVED
) != 0) {
146 puts("Error: Bad gzipped data\n");
149 if ((flags
& EXTRA_FIELD
) != 0)
150 i
= 12 + src
[10] + (src
[11] << 8);
151 if ((flags
& ORIG_NAME
) != 0)
152 while (src
[i
++] != 0)
154 if ((flags
& COMMENT
) != 0)
155 while (src
[i
++] != 0)
157 if ((flags
& HEAD_CRC
) != 0)
161 puts("Error: gunzip out of data in header");
165 payload_size
= len
- i
- 8;
167 memcpy(&expected_crc
, src
+ len
- 8, sizeof(expected_crc
));
168 expected_crc
= le32_to_cpu(expected_crc
);
170 memcpy(&szuncompressed
, src
+ len
- 4, sizeof(szuncompressed
));
171 if (szexpected
== 0) {
172 szexpected
= le32_to_cpu(szuncompressed
);
173 } else if (szuncompressed
!= (u32
)szexpected
) {
174 printf("size of %llx doesn't match trailer low bits %x\n",
175 szexpected
, szuncompressed
);
178 if (lldiv(szexpected
, dev
->blksz
) > (dev
->lba
- outblock
)) {
179 printf("%s: uncompressed size %llu exceeds device size\n",
180 __func__
, szexpected
);
184 gzwrite_progress_init(szexpected
);
189 r
= inflateInit2(&s
, -MAX_WBITS
);
191 printf("Error: inflateInit2() returned %d\n", r
);
196 s
.avail_in
= payload_size
+8;
197 writebuf
= (unsigned char *)malloc_cache_aligned(szwritebuf
);
199 /* decompress until deflate stream ends or end of file */
201 if (s
.avail_in
== 0) {
202 printf("%s: weird termination with result %d\n",
207 /* run inflate() on input until output buffer not full */
209 unsigned long blocks_written
;
211 lbaint_t writeblocks
;
213 s
.avail_out
= szwritebuf
;
214 s
.next_out
= writebuf
;
215 r
= inflate(&s
, Z_SYNC_FLUSH
);
217 (r
!= Z_STREAM_END
)) {
218 printf("Error: inflate() returned %d\n", r
);
221 numfilled
= szwritebuf
- s
.avail_out
;
222 crc
= crc32(crc
, writebuf
, numfilled
);
223 totalfilled
+= numfilled
;
224 if (numfilled
< szwritebuf
) {
225 writeblocks
= (numfilled
+dev
->blksz
-1)
227 memset(writebuf
+numfilled
, 0,
228 dev
->blksz
-(numfilled
%dev
->blksz
));
230 writeblocks
= blksperbuf
;
233 gzwrite_progress(iteration
++,
236 blocks_written
= blk_dwrite(dev
, outblock
,
237 writeblocks
, writebuf
);
238 outblock
+= blocks_written
;
244 } while (s
.avail_out
== 0);
245 /* done when inflate() says it's done */
246 } while (r
!= Z_STREAM_END
);
248 if ((szexpected
!= totalfilled
) ||
249 (crc
!= expected_crc
))
255 gzwrite_progress_finish(r
, totalfilled
, szexpected
,
265 * Uncompress blocks compressed with zlib without headers
267 int zunzip(void *dst
, int dstlen
, unsigned char *src
, unsigned long *lenp
,
268 int stoponerr
, int offset
)
277 r
= inflateInit2(&s
, -MAX_WBITS
);
279 printf("Error: inflateInit2() returned %d\n", r
);
282 s
.next_in
= src
+ offset
;
283 s
.avail_in
= *lenp
- offset
;
285 s
.avail_out
= dstlen
;
287 r
= inflate(&s
, Z_FINISH
);
288 if (stoponerr
== 1 && r
!= Z_STREAM_END
&&
289 (s
.avail_in
== 0 || s
.avail_out
== 0 || r
!= Z_BUF_ERROR
)) {
290 printf("Error: inflate() returned %d\n", r
);
294 } while (r
== Z_BUF_ERROR
);
295 *lenp
= s
.next_out
- (unsigned char *) dst
;