2 * Copyright (c) 2019 Stefan Sperling <stsp@openbsd.org>
4 * Permission to use, copy, modify, and distribute this software for any
5 * purpose with or without fee is hereby granted, provided that the above
6 * copyright notice and this permission notice appear in all copies.
8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17 #include <sys/queue.h>
27 #include "got_error.h"
28 #include "got_object.h"
31 #include "got_lib_deflate.h"
32 #include "got_lib_poll.h"
35 #define MIN(_a,_b) ((_a) < (_b) ? (_a) : (_b))
38 const struct got_error *
39 got_deflate_init(struct got_deflate_buf *zb, uint8_t *outbuf, size_t bufsize)
41 const struct got_error *err = NULL;
44 memset(&zb->z, 0, sizeof(zb->z));
46 zb->z.zalloc = Z_NULL;
48 zerr = deflateInit(&zb->z, Z_DEFAULT_COMPRESSION);
51 return got_error_from_errno("deflateInit");
52 if (zerr == Z_MEM_ERROR) {
54 return got_error_from_errno("deflateInit");
56 return got_error(GOT_ERR_COMPRESSION);
59 zb->inlen = zb->outlen = bufsize;
61 zb->inbuf = calloc(1, zb->inlen);
62 if (zb->inbuf == NULL) {
63 err = got_error_from_errno("calloc");
69 zb->outbuf = calloc(1, zb->outlen);
70 if (zb->outbuf == NULL) {
71 err = got_error_from_errno("calloc");
74 zb->flags |= GOT_DEFLATE_F_OWN_OUTBUF;
84 csum_output(struct got_deflate_checksum *csum, const uint8_t *buf, size_t len)
87 *csum->output_crc = crc32(*csum->output_crc, buf, len);
89 if (csum->output_sha1)
90 SHA1Update(csum->output_sha1, buf, len);
93 const struct got_error *
94 got_deflate_read(struct got_deflate_buf *zb, FILE *f, off_t len,
95 size_t *outlenp, off_t *consumed)
97 size_t last_total_out = zb->z.total_out;
101 z->next_out = zb->outbuf;
102 z->avail_out = zb->outlen;
107 size_t last_total_in = z->total_in;
108 if (z->avail_in == 0) {
110 if (*consumed < len) {
111 n = fread(zb->inbuf, 1,
112 MIN(zb->inlen, len - *consumed), f);
116 return got_ferror(f, GOT_ERR_IO);
118 ret = deflate(z, Z_FINISH);
121 z->next_in = zb->inbuf;
124 ret = deflate(z, Z_NO_FLUSH);
125 *consumed += z->total_in - last_total_in;
126 } while (ret == Z_OK && z->avail_out > 0);
129 zb->flags |= GOT_DEFLATE_F_HAVE_MORE;
131 if (ret != Z_STREAM_END)
132 return got_error(GOT_ERR_COMPRESSION);
133 zb->flags &= ~GOT_DEFLATE_F_HAVE_MORE;
136 *outlenp = z->total_out - last_total_out;
140 static const struct got_error *
141 deflate_read_mmap(struct got_deflate_buf *zb, uint8_t *map, size_t offset,
142 size_t len, size_t *outlenp, size_t *consumed, int flush_on_eof)
144 z_stream *z = &zb->z;
145 size_t last_total_out = z->total_out;
148 z->next_out = zb->outbuf;
149 z->avail_out = zb->outlen;
154 size_t last_total_in = z->total_in;
155 if (z->avail_in == 0) {
156 z->next_in = map + offset + *consumed;
157 if (len - *consumed > UINT_MAX)
158 z->avail_in = UINT_MAX;
160 z->avail_in = len - *consumed;
161 if (z->avail_in == 0) {
164 ret = deflate(z, Z_FINISH);
168 ret = deflate(z, Z_NO_FLUSH);
169 *consumed += z->total_in - last_total_in;
170 } while (ret == Z_OK && z->avail_out > 0);
173 zb->flags |= GOT_DEFLATE_F_HAVE_MORE;
175 if (ret != Z_STREAM_END)
176 return got_error(GOT_ERR_COMPRESSION);
177 zb->flags &= ~GOT_DEFLATE_F_HAVE_MORE;
180 *outlenp = z->total_out - last_total_out;
184 const struct got_error *
185 got_deflate_read_mmap(struct got_deflate_buf *zb, uint8_t *map, size_t offset,
186 size_t len, size_t *outlenp, size_t *consumed)
188 return deflate_read_mmap(zb, map, offset, len, outlenp, consumed, 1);
191 const struct got_error *
192 got_deflate_flush(struct got_deflate_buf *zb, FILE *outfile,
193 struct got_deflate_checksum *csum, off_t *outlenp)
197 z_stream *z = &zb->z;
199 if (z->avail_in != 0)
200 return got_error_msg(GOT_ERR_COMPRESSION,
201 "cannot flush zb with pending input data");
204 size_t avail, last_total_out = zb->z.total_out;
206 z->next_out = zb->outbuf;
207 z->avail_out = zb->outlen;
209 ret = deflate(z, Z_FINISH);
210 if (ret != Z_STREAM_END && ret != Z_OK)
211 return got_error(GOT_ERR_COMPRESSION);
213 avail = z->total_out - last_total_out;
215 n = fwrite(zb->outbuf, avail, 1, outfile);
217 return got_ferror(outfile, GOT_ERR_IO);
219 csum_output(csum, zb->outbuf, avail);
223 } while (ret != Z_STREAM_END);
225 zb->flags &= ~GOT_DEFLATE_F_HAVE_MORE;
230 got_deflate_end(struct got_deflate_buf *zb)
233 if (zb->flags & GOT_DEFLATE_F_OWN_OUTBUF)
238 const struct got_error *
239 got_deflate_to_fd(off_t *outlen, FILE *infile, off_t len, int outfd,
240 struct got_deflate_checksum *csum)
242 const struct got_error *err;
245 struct got_deflate_buf zb;
247 err = got_deflate_init(&zb, NULL, GOT_DEFLATE_BUFSIZE);
254 err = got_deflate_read(&zb, infile, len, &avail, &consumed);
259 err = got_poll_write_full(outfd, zb.outbuf, avail);
263 csum_output(csum, zb.outbuf, avail);
266 } while (zb.flags & GOT_DEFLATE_F_HAVE_MORE);
269 got_deflate_end(&zb);
273 const struct got_error *
274 got_deflate_to_fd_mmap(off_t *outlen, uint8_t *map, size_t offset,
275 size_t len, int outfd, struct got_deflate_checksum *csum)
277 const struct got_error *err;
278 size_t avail, consumed;
279 struct got_deflate_buf zb;
281 err = got_deflate_init(&zb, NULL, GOT_DEFLATE_BUFSIZE);
287 err = got_deflate_read_mmap(&zb, map, offset, len, &avail,
294 err = got_poll_write_full(outfd, zb.outbuf, avail);
298 csum_output(csum, zb.outbuf, avail);
301 } while (zb.flags & GOT_DEFLATE_F_HAVE_MORE);
304 got_deflate_end(&zb);
308 const struct got_error *
309 got_deflate_to_file(off_t *outlen, FILE *infile, off_t len,
310 FILE *outfile, struct got_deflate_checksum *csum)
312 const struct got_error *err;
315 struct got_deflate_buf zb;
317 err = got_deflate_init(&zb, NULL, GOT_DEFLATE_BUFSIZE);
324 err = got_deflate_read(&zb, infile, len, &avail, &consumed);
330 n = fwrite(zb.outbuf, avail, 1, outfile);
332 err = got_ferror(outfile, GOT_ERR_IO);
336 csum_output(csum, zb.outbuf, avail);
339 } while (zb.flags & GOT_DEFLATE_F_HAVE_MORE);
342 got_deflate_end(&zb);
346 const struct got_error *
347 got_deflate_to_file_mmap(off_t *outlen, uint8_t *map, size_t offset,
348 size_t len, FILE *outfile, struct got_deflate_checksum *csum)
350 const struct got_error *err;
351 size_t avail, consumed;
352 struct got_deflate_buf zb;
354 err = got_deflate_init(&zb, NULL, GOT_DEFLATE_BUFSIZE);
360 err = got_deflate_read_mmap(&zb, map, offset, len, &avail,
368 n = fwrite(zb.outbuf, avail, 1, outfile);
370 err = got_ferror(outfile, GOT_ERR_IO);
374 csum_output(csum, zb.outbuf, avail);
377 } while (zb.flags & GOT_DEFLATE_F_HAVE_MORE);
380 got_deflate_end(&zb);
384 const struct got_error *
385 got_deflate_append_to_file_mmap(struct got_deflate_buf *zb, off_t *outlen,
386 uint8_t *map, size_t offset, size_t len, FILE *outfile,
387 struct got_deflate_checksum *csum)
389 const struct got_error *err;
390 size_t avail, consumed;
393 err = deflate_read_mmap(zb, map, offset, len, &avail,
401 n = fwrite(zb->outbuf, avail, 1, outfile);
403 err = got_ferror(outfile, GOT_ERR_IO);
407 csum_output(csum, zb->outbuf, avail);
411 } while ((zb->flags & GOT_DEFLATE_F_HAVE_MORE) && len > 0);
416 const struct got_error *
417 got_deflate_to_mem_mmap(uint8_t **outbuf, size_t *outlen,
418 size_t *consumed_total, struct got_deflate_checksum *csum, uint8_t *map,
419 size_t offset, size_t len)
421 const struct got_error *err;
422 size_t avail, consumed;
423 struct got_deflate_buf zb;
428 *outbuf = malloc(GOT_DEFLATE_BUFSIZE);
430 return got_error_from_errno("malloc");
431 err = got_deflate_init(&zb, *outbuf, GOT_DEFLATE_BUFSIZE);
438 err = got_deflate_init(&zb, NULL, GOT_DEFLATE_BUFSIZE);
447 err = got_deflate_read_mmap(&zb, map, offset, len, &avail,
453 *consumed_total += consumed;
455 if (avail > 0 && csum)
456 csum_output(csum, zb.outbuf, avail);
458 if ((zb.flags & GOT_DEFLATE_F_HAVE_MORE) && outbuf != NULL) {
459 newbuf = reallocarray(*outbuf, ++nbuf,
460 GOT_DEFLATE_BUFSIZE);
461 if (newbuf == NULL) {
462 err = got_error_from_errno("reallocarray");
469 zb.outbuf = newbuf + *outlen;
470 zb.outlen = (nbuf * GOT_DEFLATE_BUFSIZE) - *outlen;
472 } while (zb.flags & GOT_DEFLATE_F_HAVE_MORE);
474 got_deflate_end(&zb);