1 // SPDX-License-Identifier: GPL-2.0+
3 * (C) Copyright 2000-2006
4 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
14 #include <u-boot/zlib.h>
17 #define HEADER0 '\x1f'
18 #define HEADER1 '\x8b'
19 #define ZALLOC_ALIGNMENT 16
27 void *gzalloc(void *x
, unsigned items
, unsigned size
)
32 size
= (size
+ ZALLOC_ALIGNMENT
- 1) & ~(ZALLOC_ALIGNMENT
- 1);
39 void gzfree(void *x
, void *addr
, unsigned nb
)
44 int gzip_parse_header(const unsigned char *src
, unsigned long len
)
51 if (src
[2] != DEFLATED
|| (flags
& RESERVED
) != 0) {
52 puts ("Error: Bad gzipped data\n");
55 if ((flags
& EXTRA_FIELD
) != 0)
56 i
= 12 + src
[10] + (src
[11] << 8);
57 if ((flags
& ORIG_NAME
) != 0)
60 if ((flags
& COMMENT
) != 0)
63 if ((flags
& HEAD_CRC
) != 0)
66 puts ("Error: gunzip out of data in header\n");
72 int gunzip(void *dst
, int dstlen
, unsigned char *src
, unsigned long *lenp
)
74 int offset
= gzip_parse_header(src
, *lenp
);
79 return zunzip(dst
, dstlen
, src
, lenp
, 1, offset
);
82 #ifdef CONFIG_CMD_UNZIP
84 void gzwrite_progress_init(u64 expectedsize
)
90 void gzwrite_progress(int iteration
,
94 if (0 == (iteration
& 3))
95 printf("%llu/%llu\r", bytes_written
, total_bytes
);
99 void gzwrite_progress_finish(int returnval
,
105 if (0 == returnval
) {
106 printf("\n\t%llu bytes, crc 0x%08x\n",
107 total_bytes
, calculated_crc
);
109 printf("\n\tuncompressed %llu of %llu\n"
110 "\tcrcs == 0x%08x/0x%08x\n",
111 bytes_written
, total_bytes
,
112 expected_crc
, calculated_crc
);
116 int gzwrite(unsigned char *src
, int len
,
117 struct blk_desc
*dev
,
118 unsigned long szwritebuf
,
125 unsigned char *writebuf
;
128 lbaint_t blksperbuf
, outblock
;
134 (szwritebuf
% dev
->blksz
) ||
135 (szwritebuf
< dev
->blksz
)) {
136 printf("%s: size %lu not a multiple of %lu\n",
137 __func__
, szwritebuf
, dev
->blksz
);
141 if (startoffs
& (dev
->blksz
-1)) {
142 printf("%s: start offset %llu not a multiple of %lu\n",
143 __func__
, startoffs
, dev
->blksz
);
147 blksperbuf
= szwritebuf
/ dev
->blksz
;
148 outblock
= lldiv(startoffs
, dev
->blksz
);
153 if (src
[2] != DEFLATED
|| (flags
& RESERVED
) != 0) {
154 puts("Error: Bad gzipped data\n");
157 if ((flags
& EXTRA_FIELD
) != 0)
158 i
= 12 + src
[10] + (src
[11] << 8);
159 if ((flags
& ORIG_NAME
) != 0)
160 while (src
[i
++] != 0)
162 if ((flags
& COMMENT
) != 0)
163 while (src
[i
++] != 0)
165 if ((flags
& HEAD_CRC
) != 0)
169 puts("Error: gunzip out of data in header");
173 payload_size
= len
- i
- 8;
175 memcpy(&expected_crc
, src
+ len
- 8, sizeof(expected_crc
));
176 expected_crc
= le32_to_cpu(expected_crc
);
178 memcpy(&szuncompressed
, src
+ len
- 4, sizeof(szuncompressed
));
179 if (szexpected
== 0) {
180 szexpected
= le32_to_cpu(szuncompressed
);
181 } else if (szuncompressed
!= (u32
)szexpected
) {
182 printf("size of %llx doesn't match trailer low bits %x\n",
183 szexpected
, szuncompressed
);
186 if (lldiv(szexpected
, dev
->blksz
) > (dev
->lba
- outblock
)) {
187 printf("%s: uncompressed size %llu exceeds device size\n",
188 __func__
, szexpected
);
192 gzwrite_progress_init(szexpected
);
197 r
= inflateInit2(&s
, -MAX_WBITS
);
199 printf("Error: inflateInit2() returned %d\n", r
);
204 s
.avail_in
= payload_size
+8;
205 writebuf
= (unsigned char *)malloc_cache_aligned(szwritebuf
);
207 /* decompress until deflate stream ends or end of file */
209 if (s
.avail_in
== 0) {
210 printf("%s: weird termination with result %d\n",
215 /* run inflate() on input until output buffer not full */
217 unsigned long blocks_written
;
219 lbaint_t writeblocks
;
221 s
.avail_out
= szwritebuf
;
222 s
.next_out
= writebuf
;
223 r
= inflate(&s
, Z_SYNC_FLUSH
);
225 (r
!= Z_STREAM_END
)) {
226 printf("Error: inflate() returned %d\n", r
);
229 numfilled
= szwritebuf
- s
.avail_out
;
230 crc
= crc32(crc
, writebuf
, numfilled
);
231 totalfilled
+= numfilled
;
232 if (numfilled
< szwritebuf
) {
233 writeblocks
= (numfilled
+dev
->blksz
-1)
235 memset(writebuf
+numfilled
, 0,
236 dev
->blksz
-(numfilled
%dev
->blksz
));
238 writeblocks
= blksperbuf
;
241 gzwrite_progress(iteration
++,
244 blocks_written
= blk_dwrite(dev
, outblock
,
245 writeblocks
, writebuf
);
246 outblock
+= blocks_written
;
252 } while (s
.avail_out
== 0);
253 /* done when inflate() says it's done */
254 } while (r
!= Z_STREAM_END
);
256 if ((szexpected
!= totalfilled
) ||
257 (crc
!= expected_crc
))
263 gzwrite_progress_finish(r
, totalfilled
, szexpected
,
273 * Uncompress blocks compressed with zlib without headers
275 int zunzip(void *dst
, int dstlen
, unsigned char *src
, unsigned long *lenp
,
276 int stoponerr
, int offset
)
285 r
= inflateInit2(&s
, -MAX_WBITS
);
287 printf("Error: inflateInit2() returned %d\n", r
);
290 s
.next_in
= src
+ offset
;
291 s
.avail_in
= *lenp
- offset
;
293 s
.avail_out
= dstlen
;
295 r
= inflate(&s
, Z_FINISH
);
296 if (stoponerr
== 1 && r
!= Z_STREAM_END
&&
297 (s
.avail_in
== 0 || s
.avail_out
== 0 || r
!= Z_BUF_ERROR
)) {
298 printf("Error: inflate() returned %d\n", r
);
302 } while (r
== Z_BUF_ERROR
);
303 *lenp
= s
.next_out
- (unsigned char *) dst
;