]>
git.ipfire.org Git - people/ms/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+
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 gunzip(void *dst
, int dstlen
, unsigned char *src
, unsigned long *lenp
)
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");
70 return zunzip(dst
, dstlen
, src
, lenp
, 1, i
);
74 void gzwrite_progress_init(u64 expectedsize
)
80 void gzwrite_progress(int iteration
,
84 if (0 == (iteration
& 3))
85 printf("%llu/%llu\r", bytes_written
, total_bytes
);
89 void gzwrite_progress_finish(int returnval
,
96 printf("\n\t%llu bytes, crc 0x%08x\n",
97 total_bytes
, calculated_crc
);
99 printf("\n\tuncompressed %llu of %llu\n"
100 "\tcrcs == 0x%08x/0x%08x\n",
101 bytes_written
, total_bytes
,
102 expected_crc
, calculated_crc
);
106 int gzwrite(unsigned char *src
, int len
,
107 struct block_dev_desc
*dev
,
108 unsigned long szwritebuf
,
115 unsigned char *writebuf
;
118 lbaint_t blksperbuf
, outblock
;
124 (szwritebuf
% dev
->blksz
) ||
125 (szwritebuf
< dev
->blksz
)) {
126 printf("%s: size %lu not a multiple of %lu\n",
127 __func__
, szwritebuf
, dev
->blksz
);
131 if (startoffs
& (dev
->blksz
-1)) {
132 printf("%s: start offset %llu not a multiple of %lu\n",
133 __func__
, startoffs
, dev
->blksz
);
137 blksperbuf
= szwritebuf
/ dev
->blksz
;
138 outblock
= lldiv(startoffs
, dev
->blksz
);
143 if (src
[2] != DEFLATED
|| (flags
& RESERVED
) != 0) {
144 puts("Error: Bad gzipped data\n");
147 if ((flags
& EXTRA_FIELD
) != 0)
148 i
= 12 + src
[10] + (src
[11] << 8);
149 if ((flags
& ORIG_NAME
) != 0)
150 while (src
[i
++] != 0)
152 if ((flags
& COMMENT
) != 0)
153 while (src
[i
++] != 0)
155 if ((flags
& HEAD_CRC
) != 0)
159 puts("Error: gunzip out of data in header");
163 payload_size
= len
- i
- 8;
165 memcpy(&expected_crc
, src
+ len
- 8, sizeof(expected_crc
));
166 expected_crc
= le32_to_cpu(expected_crc
);
168 memcpy(&szuncompressed
, src
+ len
- 4, sizeof(szuncompressed
));
169 if (szexpected
== 0) {
170 szexpected
= le32_to_cpu(szuncompressed
);
171 } else if (szuncompressed
!= (u32
)szexpected
) {
172 printf("size of %llx doesn't match trailer low bits %x\n",
173 szexpected
, szuncompressed
);
176 if (lldiv(szexpected
, dev
->blksz
) > (dev
->lba
- outblock
)) {
177 printf("%s: uncompressed size %llu exceeds device size\n",
178 __func__
, szexpected
);
182 gzwrite_progress_init(szexpected
);
187 r
= inflateInit2(&s
, -MAX_WBITS
);
189 printf("Error: inflateInit2() returned %d\n", r
);
194 s
.avail_in
= payload_size
+8;
195 writebuf
= (unsigned char *)malloc(szwritebuf
);
197 /* decompress until deflate stream ends or end of file */
199 if (s
.avail_in
== 0) {
200 printf("%s: weird termination with result %d\n",
205 /* run inflate() on input until output buffer not full */
207 unsigned long blocks_written
;
209 lbaint_t writeblocks
;
211 s
.avail_out
= szwritebuf
;
212 s
.next_out
= writebuf
;
213 r
= inflate(&s
, Z_SYNC_FLUSH
);
215 (r
!= Z_STREAM_END
)) {
216 printf("Error: inflate() returned %d\n", r
);
219 numfilled
= szwritebuf
- s
.avail_out
;
220 crc
= crc32(crc
, writebuf
, numfilled
);
221 totalfilled
+= numfilled
;
222 if (numfilled
< szwritebuf
) {
223 writeblocks
= (numfilled
+dev
->blksz
-1)
225 memset(writebuf
+numfilled
, 0,
226 dev
->blksz
-(numfilled
%dev
->blksz
));
228 writeblocks
= blksperbuf
;
231 gzwrite_progress(iteration
++,
234 blocks_written
= dev
->block_write(dev
->dev
,
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
,
264 * Uncompress blocks compressed with zlib without headers
266 int zunzip(void *dst
, int dstlen
, unsigned char *src
, unsigned long *lenp
,
267 int stoponerr
, int offset
)
276 r
= inflateInit2(&s
, -MAX_WBITS
);
278 printf("Error: inflateInit2() returned %d\n", r
);
281 s
.next_in
= src
+ offset
;
282 s
.avail_in
= *lenp
- offset
;
284 s
.avail_out
= dstlen
;
286 r
= inflate(&s
, Z_FINISH
);
287 if (stoponerr
== 1 && r
!= Z_STREAM_END
&&
288 (s
.avail_out
== 0 || r
!= Z_BUF_ERROR
)) {
289 printf("Error: inflate() returned %d\n", r
);
293 s
.avail_in
= *lenp
- offset
- (int)(s
.next_out
- (unsigned char*)dst
);
294 } while (r
== Z_BUF_ERROR
);
295 *lenp
= s
.next_out
- (unsigned char *) dst
;