2 2181e0c8 2019-03-19 stsp * Copyright (c) 2019 Stefan Sperling <stsp@openbsd.org>
4 2181e0c8 2019-03-19 stsp * Permission to use, copy, modify, and distribute this software for any
5 2181e0c8 2019-03-19 stsp * purpose with or without fee is hereby granted, provided that the above
6 2181e0c8 2019-03-19 stsp * copyright notice and this permission notice appear in all copies.
8 2181e0c8 2019-03-19 stsp * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9 2181e0c8 2019-03-19 stsp * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10 2181e0c8 2019-03-19 stsp * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11 2181e0c8 2019-03-19 stsp * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12 2181e0c8 2019-03-19 stsp * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13 2181e0c8 2019-03-19 stsp * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14 2181e0c8 2019-03-19 stsp * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17 68069cf6 2023-03-08 thomas #include "got_compat.h"
19 8b925c6c 2022-07-16 thomas #include <sys/queue.h>
21 2181e0c8 2019-03-19 stsp #include <errno.h>
22 2181e0c8 2019-03-19 stsp #include <stdio.h>
23 2181e0c8 2019-03-19 stsp #include <stdlib.h>
24 2181e0c8 2019-03-19 stsp #include <string.h>
25 2181e0c8 2019-03-19 stsp #include <zlib.h>
26 2181e0c8 2019-03-19 stsp #include <time.h>
28 2181e0c8 2019-03-19 stsp #include "got_error.h"
29 2181e0c8 2019-03-19 stsp #include "got_object.h"
30 324d37e7 2019-05-11 stsp #include "got_path.h"
32 2181e0c8 2019-03-19 stsp #include "got_lib_deflate.h"
33 b16893ba 2023-02-24 thomas #include "got_lib_hash.h"
34 3efd8e31 2022-10-23 thomas #include "got_lib_poll.h"
37 2181e0c8 2019-03-19 stsp #define MIN(_a,_b) ((_a) < (_b) ? (_a) : (_b))
40 2181e0c8 2019-03-19 stsp const struct got_error *
41 3b9e6fcf 2021-06-05 stsp got_deflate_init(struct got_deflate_buf *zb, uint8_t *outbuf, size_t bufsize)
43 2181e0c8 2019-03-19 stsp const struct got_error *err = NULL;
46 0699dbc2 2022-11-08 thomas memset(zb, 0, sizeof(*zb));
48 2181e0c8 2019-03-19 stsp zb->z.zalloc = Z_NULL;
49 2181e0c8 2019-03-19 stsp zb->z.zfree = Z_NULL;
50 2181e0c8 2019-03-19 stsp zerr = deflateInit(&zb->z, Z_DEFAULT_COMPRESSION);
51 2181e0c8 2019-03-19 stsp if (zerr != Z_OK) {
52 2181e0c8 2019-03-19 stsp if (zerr == Z_ERRNO)
53 638f9024 2019-05-13 stsp return got_error_from_errno("deflateInit");
54 2181e0c8 2019-03-19 stsp if (zerr == Z_MEM_ERROR) {
55 2181e0c8 2019-03-19 stsp errno = ENOMEM;
56 638f9024 2019-05-13 stsp return got_error_from_errno("deflateInit");
58 2181e0c8 2019-03-19 stsp return got_error(GOT_ERR_COMPRESSION);
61 2181e0c8 2019-03-19 stsp zb->inlen = zb->outlen = bufsize;
63 2181e0c8 2019-03-19 stsp zb->inbuf = calloc(1, zb->inlen);
64 2181e0c8 2019-03-19 stsp if (zb->inbuf == NULL) {
65 638f9024 2019-05-13 stsp err = got_error_from_errno("calloc");
69 2181e0c8 2019-03-19 stsp zb->flags = 0;
70 2181e0c8 2019-03-19 stsp if (outbuf == NULL) {
71 2181e0c8 2019-03-19 stsp zb->outbuf = calloc(1, zb->outlen);
72 2181e0c8 2019-03-19 stsp if (zb->outbuf == NULL) {
73 638f9024 2019-05-13 stsp err = got_error_from_errno("calloc");
76 2181e0c8 2019-03-19 stsp zb->flags |= GOT_DEFLATE_F_OWN_OUTBUF;
78 2181e0c8 2019-03-19 stsp zb->outbuf = outbuf;
81 2181e0c8 2019-03-19 stsp got_deflate_end(zb);
86 dbaa2362 2021-09-28 thomas csum_output(struct got_deflate_checksum *csum, const uint8_t *buf, size_t len)
88 91b40e30 2021-05-21 stsp if (csum->output_crc)
89 91b40e30 2021-05-21 stsp *csum->output_crc = crc32(*csum->output_crc, buf, len);
91 b16893ba 2023-02-24 thomas if (csum->output_ctx)
92 b16893ba 2023-02-24 thomas got_hash_update(csum->output_ctx, buf, len);
95 2181e0c8 2019-03-19 stsp const struct got_error *
96 e8f02263 2022-01-23 thomas got_deflate_read(struct got_deflate_buf *zb, FILE *f, off_t len,
97 e8f02263 2022-01-23 thomas size_t *outlenp, off_t *consumed)
99 2181e0c8 2019-03-19 stsp size_t last_total_out = zb->z.total_out;
100 2181e0c8 2019-03-19 stsp z_stream *z = &zb->z;
101 2181e0c8 2019-03-19 stsp int ret = Z_ERRNO;
103 2181e0c8 2019-03-19 stsp z->next_out = zb->outbuf;
104 2181e0c8 2019-03-19 stsp z->avail_out = zb->outlen;
106 2181e0c8 2019-03-19 stsp *outlenp = 0;
107 e8f02263 2022-01-23 thomas *consumed = 0;
109 e8f02263 2022-01-23 thomas size_t last_total_in = z->total_in;
110 2181e0c8 2019-03-19 stsp if (z->avail_in == 0) {
111 e8f02263 2022-01-23 thomas size_t n = 0;
112 e8f02263 2022-01-23 thomas if (*consumed < len) {
113 e8f02263 2022-01-23 thomas n = fread(zb->inbuf, 1,
114 e8f02263 2022-01-23 thomas MIN(zb->inlen, len - *consumed), f);
116 2181e0c8 2019-03-19 stsp if (n == 0) {
117 2181e0c8 2019-03-19 stsp if (ferror(f))
118 2181e0c8 2019-03-19 stsp return got_ferror(f, GOT_ERR_IO);
120 4e4a7005 2019-04-13 stsp ret = deflate(z, Z_FINISH);
123 2181e0c8 2019-03-19 stsp z->next_in = zb->inbuf;
124 2181e0c8 2019-03-19 stsp z->avail_in = n;
126 2181e0c8 2019-03-19 stsp ret = deflate(z, Z_NO_FLUSH);
127 e8f02263 2022-01-23 thomas *consumed += z->total_in - last_total_in;
128 2181e0c8 2019-03-19 stsp } while (ret == Z_OK && z->avail_out > 0);
130 2181e0c8 2019-03-19 stsp if (ret == Z_OK) {
131 2181e0c8 2019-03-19 stsp zb->flags |= GOT_DEFLATE_F_HAVE_MORE;
133 2181e0c8 2019-03-19 stsp if (ret != Z_STREAM_END)
134 2181e0c8 2019-03-19 stsp return got_error(GOT_ERR_COMPRESSION);
135 2181e0c8 2019-03-19 stsp zb->flags &= ~GOT_DEFLATE_F_HAVE_MORE;
138 2181e0c8 2019-03-19 stsp *outlenp = z->total_out - last_total_out;
139 2181e0c8 2019-03-19 stsp return NULL;
142 9249e7e3 2022-05-12 thomas static const struct got_error *
143 9249e7e3 2022-05-12 thomas deflate_read_mmap(struct got_deflate_buf *zb, uint8_t *map, size_t offset,
144 9249e7e3 2022-05-12 thomas size_t len, size_t *outlenp, size_t *consumed, int flush_on_eof)
146 2b0ae357 2022-01-10 thomas z_stream *z = &zb->z;
147 2b0ae357 2022-01-10 thomas size_t last_total_out = z->total_out;
148 2b0ae357 2022-01-10 thomas int ret = Z_ERRNO;
150 2b0ae357 2022-01-10 thomas z->next_out = zb->outbuf;
151 2b0ae357 2022-01-10 thomas z->avail_out = zb->outlen;
153 2b0ae357 2022-01-10 thomas *outlenp = 0;
154 2b0ae357 2022-01-10 thomas *consumed = 0;
156 2b0ae357 2022-01-10 thomas size_t last_total_in = z->total_in;
157 2b0ae357 2022-01-10 thomas if (z->avail_in == 0) {
158 2b0ae357 2022-01-10 thomas z->next_in = map + offset + *consumed;
159 f6a55b40 2022-02-12 thomas if (len - *consumed > UINT_MAX)
160 f6a55b40 2022-02-12 thomas z->avail_in = UINT_MAX;
162 f6a55b40 2022-02-12 thomas z->avail_in = len - *consumed;
163 2b0ae357 2022-01-10 thomas if (z->avail_in == 0) {
164 2b0ae357 2022-01-10 thomas /* EOF */
165 9249e7e3 2022-05-12 thomas if (flush_on_eof)
166 9249e7e3 2022-05-12 thomas ret = deflate(z, Z_FINISH);
170 2b0ae357 2022-01-10 thomas ret = deflate(z, Z_NO_FLUSH);
171 2b0ae357 2022-01-10 thomas *consumed += z->total_in - last_total_in;
172 2b0ae357 2022-01-10 thomas } while (ret == Z_OK && z->avail_out > 0);
174 2b0ae357 2022-01-10 thomas if (ret == Z_OK) {
175 2b0ae357 2022-01-10 thomas zb->flags |= GOT_DEFLATE_F_HAVE_MORE;
177 2b0ae357 2022-01-10 thomas if (ret != Z_STREAM_END)
178 2b0ae357 2022-01-10 thomas return got_error(GOT_ERR_COMPRESSION);
179 2b0ae357 2022-01-10 thomas zb->flags &= ~GOT_DEFLATE_F_HAVE_MORE;
182 2b0ae357 2022-01-10 thomas *outlenp = z->total_out - last_total_out;
183 9249e7e3 2022-05-12 thomas return NULL;
186 9249e7e3 2022-05-12 thomas const struct got_error *
187 9249e7e3 2022-05-12 thomas got_deflate_read_mmap(struct got_deflate_buf *zb, uint8_t *map, size_t offset,
188 9249e7e3 2022-05-12 thomas size_t len, size_t *outlenp, size_t *consumed)
190 9249e7e3 2022-05-12 thomas return deflate_read_mmap(zb, map, offset, len, outlenp, consumed, 1);
193 9249e7e3 2022-05-12 thomas const struct got_error *
194 9249e7e3 2022-05-12 thomas got_deflate_flush(struct got_deflate_buf *zb, FILE *outfile,
195 9249e7e3 2022-05-12 thomas struct got_deflate_checksum *csum, off_t *outlenp)
198 9249e7e3 2022-05-12 thomas size_t n;
199 9249e7e3 2022-05-12 thomas z_stream *z = &zb->z;
201 9249e7e3 2022-05-12 thomas if (z->avail_in != 0)
202 9249e7e3 2022-05-12 thomas return got_error_msg(GOT_ERR_COMPRESSION,
203 9249e7e3 2022-05-12 thomas "cannot flush zb with pending input data");
206 9249e7e3 2022-05-12 thomas size_t avail, last_total_out = zb->z.total_out;
208 9249e7e3 2022-05-12 thomas z->next_out = zb->outbuf;
209 9249e7e3 2022-05-12 thomas z->avail_out = zb->outlen;
211 9249e7e3 2022-05-12 thomas ret = deflate(z, Z_FINISH);
212 9249e7e3 2022-05-12 thomas if (ret != Z_STREAM_END && ret != Z_OK)
213 9249e7e3 2022-05-12 thomas return got_error(GOT_ERR_COMPRESSION);
215 9249e7e3 2022-05-12 thomas avail = z->total_out - last_total_out;
216 9249e7e3 2022-05-12 thomas if (avail > 0) {
217 9249e7e3 2022-05-12 thomas n = fwrite(zb->outbuf, avail, 1, outfile);
218 9249e7e3 2022-05-12 thomas if (n != 1)
219 9249e7e3 2022-05-12 thomas return got_ferror(outfile, GOT_ERR_IO);
220 9249e7e3 2022-05-12 thomas if (csum)
221 9249e7e3 2022-05-12 thomas csum_output(csum, zb->outbuf, avail);
222 9249e7e3 2022-05-12 thomas if (outlenp)
223 9249e7e3 2022-05-12 thomas *outlenp += avail;
225 9249e7e3 2022-05-12 thomas } while (ret != Z_STREAM_END);
227 9249e7e3 2022-05-12 thomas zb->flags &= ~GOT_DEFLATE_F_HAVE_MORE;
228 2b0ae357 2022-01-10 thomas return NULL;
232 2181e0c8 2019-03-19 stsp got_deflate_end(struct got_deflate_buf *zb)
234 2181e0c8 2019-03-19 stsp free(zb->inbuf);
235 2181e0c8 2019-03-19 stsp if (zb->flags & GOT_DEFLATE_F_OWN_OUTBUF)
236 2181e0c8 2019-03-19 stsp free(zb->outbuf);
237 2181e0c8 2019-03-19 stsp deflateEnd(&zb->z);
240 20a7d452 2022-10-16 thomas const struct got_error *
241 20a7d452 2022-10-16 thomas got_deflate_to_fd(off_t *outlen, FILE *infile, off_t len, int outfd,
242 20a7d452 2022-10-16 thomas struct got_deflate_checksum *csum)
244 20a7d452 2022-10-16 thomas const struct got_error *err;
245 20a7d452 2022-10-16 thomas size_t avail;
246 20a7d452 2022-10-16 thomas off_t consumed;
247 20a7d452 2022-10-16 thomas struct got_deflate_buf zb;
249 20a7d452 2022-10-16 thomas err = got_deflate_init(&zb, NULL, GOT_DEFLATE_BUFSIZE);
251 20a7d452 2022-10-16 thomas goto done;
253 20a7d452 2022-10-16 thomas *outlen = 0;
256 20a7d452 2022-10-16 thomas err = got_deflate_read(&zb, infile, len, &avail, &consumed);
258 20a7d452 2022-10-16 thomas goto done;
259 20a7d452 2022-10-16 thomas len -= consumed;
260 20a7d452 2022-10-16 thomas if (avail > 0) {
261 3efd8e31 2022-10-23 thomas err = got_poll_write_full(outfd, zb.outbuf, avail);
263 20a7d452 2022-10-16 thomas goto done;
264 20a7d452 2022-10-16 thomas if (csum)
265 20a7d452 2022-10-16 thomas csum_output(csum, zb.outbuf, avail);
266 20a7d452 2022-10-16 thomas *outlen += avail;
268 20a7d452 2022-10-16 thomas } while (zb.flags & GOT_DEFLATE_F_HAVE_MORE);
271 20a7d452 2022-10-16 thomas got_deflate_end(&zb);
272 20a7d452 2022-10-16 thomas return err;
275 20a7d452 2022-10-16 thomas const struct got_error *
276 20a7d452 2022-10-16 thomas got_deflate_to_fd_mmap(off_t *outlen, uint8_t *map, size_t offset,
277 20a7d452 2022-10-16 thomas size_t len, int outfd, struct got_deflate_checksum *csum)
279 20a7d452 2022-10-16 thomas const struct got_error *err;
280 20a7d452 2022-10-16 thomas size_t avail, consumed;
281 20a7d452 2022-10-16 thomas struct got_deflate_buf zb;
283 20a7d452 2022-10-16 thomas err = got_deflate_init(&zb, NULL, GOT_DEFLATE_BUFSIZE);
285 20a7d452 2022-10-16 thomas goto done;
287 20a7d452 2022-10-16 thomas *outlen = 0;
289 20a7d452 2022-10-16 thomas err = got_deflate_read_mmap(&zb, map, offset, len, &avail,
290 20a7d452 2022-10-16 thomas &consumed);
292 20a7d452 2022-10-16 thomas goto done;
293 20a7d452 2022-10-16 thomas offset += consumed;
294 20a7d452 2022-10-16 thomas len -= consumed;
295 20a7d452 2022-10-16 thomas if (avail > 0) {
296 3efd8e31 2022-10-23 thomas err = got_poll_write_full(outfd, zb.outbuf, avail);
298 20a7d452 2022-10-16 thomas goto done;
299 20a7d452 2022-10-16 thomas if (csum)
300 20a7d452 2022-10-16 thomas csum_output(csum, zb.outbuf, avail);
301 20a7d452 2022-10-16 thomas *outlen += avail;
303 20a7d452 2022-10-16 thomas } while (zb.flags & GOT_DEFLATE_F_HAVE_MORE);
306 20a7d452 2022-10-16 thomas got_deflate_end(&zb);
307 20a7d452 2022-10-16 thomas return err;
310 2181e0c8 2019-03-19 stsp const struct got_error *
311 e8f02263 2022-01-23 thomas got_deflate_to_file(off_t *outlen, FILE *infile, off_t len,
312 e8f02263 2022-01-23 thomas FILE *outfile, struct got_deflate_checksum *csum)
314 2181e0c8 2019-03-19 stsp const struct got_error *err;
315 2181e0c8 2019-03-19 stsp size_t avail;
316 e8f02263 2022-01-23 thomas off_t consumed;
317 2181e0c8 2019-03-19 stsp struct got_deflate_buf zb;
319 3b9e6fcf 2021-06-05 stsp err = got_deflate_init(&zb, NULL, GOT_DEFLATE_BUFSIZE);
323 2181e0c8 2019-03-19 stsp *outlen = 0;
326 e8f02263 2022-01-23 thomas err = got_deflate_read(&zb, infile, len, &avail, &consumed);
329 e8f02263 2022-01-23 thomas len -= consumed;
330 2181e0c8 2019-03-19 stsp if (avail > 0) {
332 2181e0c8 2019-03-19 stsp n = fwrite(zb.outbuf, avail, 1, outfile);
333 2181e0c8 2019-03-19 stsp if (n != 1) {
334 2181e0c8 2019-03-19 stsp err = got_ferror(outfile, GOT_ERR_IO);
338 3b9e6fcf 2021-06-05 stsp csum_output(csum, zb.outbuf, avail);
339 2181e0c8 2019-03-19 stsp *outlen += avail;
341 2181e0c8 2019-03-19 stsp } while (zb.flags & GOT_DEFLATE_F_HAVE_MORE);
344 2181e0c8 2019-03-19 stsp got_deflate_end(&zb);
345 2181e0c8 2019-03-19 stsp return err;
348 2b0ae357 2022-01-10 thomas const struct got_error *
349 e8f02263 2022-01-23 thomas got_deflate_to_file_mmap(off_t *outlen, uint8_t *map, size_t offset,
350 2b0ae357 2022-01-10 thomas size_t len, FILE *outfile, struct got_deflate_checksum *csum)
352 2b0ae357 2022-01-10 thomas const struct got_error *err;
353 2b0ae357 2022-01-10 thomas size_t avail, consumed;
354 2b0ae357 2022-01-10 thomas struct got_deflate_buf zb;
356 2b0ae357 2022-01-10 thomas err = got_deflate_init(&zb, NULL, GOT_DEFLATE_BUFSIZE);
358 2b0ae357 2022-01-10 thomas goto done;
360 2b0ae357 2022-01-10 thomas *outlen = 0;
362 2b0ae357 2022-01-10 thomas err = got_deflate_read_mmap(&zb, map, offset, len, &avail,
363 2b0ae357 2022-01-10 thomas &consumed);
365 2b0ae357 2022-01-10 thomas goto done;
366 2b0ae357 2022-01-10 thomas offset += consumed;
367 2b0ae357 2022-01-10 thomas len -= consumed;
368 2b0ae357 2022-01-10 thomas if (avail > 0) {
369 2b0ae357 2022-01-10 thomas size_t n;
370 2b0ae357 2022-01-10 thomas n = fwrite(zb.outbuf, avail, 1, outfile);
371 2b0ae357 2022-01-10 thomas if (n != 1) {
372 2b0ae357 2022-01-10 thomas err = got_ferror(outfile, GOT_ERR_IO);
373 2b0ae357 2022-01-10 thomas goto done;
375 2b0ae357 2022-01-10 thomas if (csum)
376 2b0ae357 2022-01-10 thomas csum_output(csum, zb.outbuf, avail);
377 2b0ae357 2022-01-10 thomas *outlen += avail;
379 2b0ae357 2022-01-10 thomas } while (zb.flags & GOT_DEFLATE_F_HAVE_MORE);
382 9249e7e3 2022-05-12 thomas got_deflate_end(&zb);
383 9249e7e3 2022-05-12 thomas return err;
386 9249e7e3 2022-05-12 thomas const struct got_error *
387 9249e7e3 2022-05-12 thomas got_deflate_append_to_file_mmap(struct got_deflate_buf *zb, off_t *outlen,
388 9249e7e3 2022-05-12 thomas uint8_t *map, size_t offset, size_t len, FILE *outfile,
389 9249e7e3 2022-05-12 thomas struct got_deflate_checksum *csum)
391 9249e7e3 2022-05-12 thomas const struct got_error *err;
392 9249e7e3 2022-05-12 thomas size_t avail, consumed;
395 9249e7e3 2022-05-12 thomas err = deflate_read_mmap(zb, map, offset, len, &avail,
396 9249e7e3 2022-05-12 thomas &consumed, 0);
399 9249e7e3 2022-05-12 thomas offset += consumed;
400 9249e7e3 2022-05-12 thomas len -= consumed;
401 9249e7e3 2022-05-12 thomas if (avail > 0) {
402 9249e7e3 2022-05-12 thomas size_t n;
403 9249e7e3 2022-05-12 thomas n = fwrite(zb->outbuf, avail, 1, outfile);
404 9249e7e3 2022-05-12 thomas if (n != 1) {
405 9249e7e3 2022-05-12 thomas err = got_ferror(outfile, GOT_ERR_IO);
408 9249e7e3 2022-05-12 thomas if (csum)
409 9249e7e3 2022-05-12 thomas csum_output(csum, zb->outbuf, avail);
410 9249e7e3 2022-05-12 thomas if (outlen)
411 9249e7e3 2022-05-12 thomas *outlen += avail;
413 9249e7e3 2022-05-12 thomas } while ((zb->flags & GOT_DEFLATE_F_HAVE_MORE) && len > 0);
415 9249e7e3 2022-05-12 thomas return err;
418 9249e7e3 2022-05-12 thomas const struct got_error *
419 9249e7e3 2022-05-12 thomas got_deflate_to_mem_mmap(uint8_t **outbuf, size_t *outlen,
420 9249e7e3 2022-05-12 thomas size_t *consumed_total, struct got_deflate_checksum *csum, uint8_t *map,
421 9249e7e3 2022-05-12 thomas size_t offset, size_t len)
423 9249e7e3 2022-05-12 thomas const struct got_error *err;
424 9249e7e3 2022-05-12 thomas size_t avail, consumed;
425 9249e7e3 2022-05-12 thomas struct got_deflate_buf zb;
426 9249e7e3 2022-05-12 thomas void *newbuf;
427 9249e7e3 2022-05-12 thomas size_t nbuf = 1;
429 9249e7e3 2022-05-12 thomas if (outbuf) {
430 9249e7e3 2022-05-12 thomas *outbuf = malloc(GOT_DEFLATE_BUFSIZE);
431 9249e7e3 2022-05-12 thomas if (*outbuf == NULL)
432 9249e7e3 2022-05-12 thomas return got_error_from_errno("malloc");
433 9249e7e3 2022-05-12 thomas err = got_deflate_init(&zb, *outbuf, GOT_DEFLATE_BUFSIZE);
434 9249e7e3 2022-05-12 thomas if (err) {
435 9249e7e3 2022-05-12 thomas free(*outbuf);
436 9249e7e3 2022-05-12 thomas *outbuf = NULL;
437 9249e7e3 2022-05-12 thomas return err;
440 9249e7e3 2022-05-12 thomas err = got_deflate_init(&zb, NULL, GOT_DEFLATE_BUFSIZE);
442 9249e7e3 2022-05-12 thomas return err;
445 9249e7e3 2022-05-12 thomas *outlen = 0;
446 9249e7e3 2022-05-12 thomas if (consumed_total)
447 9249e7e3 2022-05-12 thomas *consumed_total = 0;
449 9249e7e3 2022-05-12 thomas err = got_deflate_read_mmap(&zb, map, offset, len, &avail,
450 9249e7e3 2022-05-12 thomas &consumed);
452 9249e7e3 2022-05-12 thomas goto done;
453 9249e7e3 2022-05-12 thomas offset += consumed;
454 9249e7e3 2022-05-12 thomas if (consumed_total)
455 9249e7e3 2022-05-12 thomas *consumed_total += consumed;
456 9249e7e3 2022-05-12 thomas len -= consumed;
457 9249e7e3 2022-05-12 thomas if (avail > 0 && csum)
458 9249e7e3 2022-05-12 thomas csum_output(csum, zb.outbuf, avail);
459 9249e7e3 2022-05-12 thomas *outlen += avail;
460 9249e7e3 2022-05-12 thomas if ((zb.flags & GOT_DEFLATE_F_HAVE_MORE) && outbuf != NULL) {
461 9249e7e3 2022-05-12 thomas newbuf = reallocarray(*outbuf, ++nbuf,
462 9249e7e3 2022-05-12 thomas GOT_DEFLATE_BUFSIZE);
463 9249e7e3 2022-05-12 thomas if (newbuf == NULL) {
464 9249e7e3 2022-05-12 thomas err = got_error_from_errno("reallocarray");
465 9249e7e3 2022-05-12 thomas free(*outbuf);
466 9249e7e3 2022-05-12 thomas *outbuf = NULL;
467 9249e7e3 2022-05-12 thomas *outlen = 0;
468 9249e7e3 2022-05-12 thomas goto done;
470 9249e7e3 2022-05-12 thomas *outbuf = newbuf;
471 9249e7e3 2022-05-12 thomas zb.outbuf = newbuf + *outlen;
472 9249e7e3 2022-05-12 thomas zb.outlen = (nbuf * GOT_DEFLATE_BUFSIZE) - *outlen;
474 9249e7e3 2022-05-12 thomas } while (zb.flags & GOT_DEFLATE_F_HAVE_MORE);
476 2b0ae357 2022-01-10 thomas got_deflate_end(&zb);
477 2b0ae357 2022-01-10 thomas return err;