1 2181e0c8 2019-03-19 stsp /*
  2 2181e0c8 2019-03-19 stsp  * Copyright (c) 2019 Stefan Sperling <stsp@openbsd.org>
  3 2181e0c8 2019-03-19 stsp  *
  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.
  7 2181e0c8 2019-03-19 stsp  *
  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.
 15 2181e0c8 2019-03-19 stsp  */
 16 2181e0c8 2019-03-19 stsp 
 17 2181e0c8 2019-03-19 stsp #include <sys/queue.h>
 18 2181e0c8 2019-03-19 stsp 
 19 2181e0c8 2019-03-19 stsp #include <errno.h>
 20 2181e0c8 2019-03-19 stsp #include <stdio.h>
 21 2181e0c8 2019-03-19 stsp #include <stdlib.h>
 22 2181e0c8 2019-03-19 stsp #include <string.h>
 23 2181e0c8 2019-03-19 stsp #include <sha1.h>
 24 5822e79e 2023-02-23 op #include <sha2.h>
 25 2181e0c8 2019-03-19 stsp #include <zlib.h>
 26 2181e0c8 2019-03-19 stsp #include <time.h>
 27 2181e0c8 2019-03-19 stsp 
 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"
 31 2181e0c8 2019-03-19 stsp 
 32 2181e0c8 2019-03-19 stsp #include "got_lib_deflate.h"
 33 ae25a666 2023-02-23 op #include "got_lib_hash.h"
 34 13b2bc37 2022-10-23 stsp #include "got_lib_poll.h"
 35 2181e0c8 2019-03-19 stsp 
 36 2181e0c8 2019-03-19 stsp #ifndef MIN
 37 2181e0c8 2019-03-19 stsp #define	MIN(_a,_b) ((_a) < (_b) ? (_a) : (_b))
 38 2181e0c8 2019-03-19 stsp #endif
 39 2181e0c8 2019-03-19 stsp 
 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)
 42 2181e0c8 2019-03-19 stsp {
 43 2181e0c8 2019-03-19 stsp 	const struct got_error *err = NULL;
 44 2181e0c8 2019-03-19 stsp 	int zerr;
 45 2181e0c8 2019-03-19 stsp 
 46 0fc5e229 2022-11-08 stsp 	memset(zb, 0, sizeof(*zb));
 47 2181e0c8 2019-03-19 stsp 
 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");
 57 2181e0c8 2019-03-19 stsp 		}
 58 2181e0c8 2019-03-19 stsp 		return got_error(GOT_ERR_COMPRESSION);
 59 2181e0c8 2019-03-19 stsp 	}
 60 2181e0c8 2019-03-19 stsp 
 61 2181e0c8 2019-03-19 stsp 	zb->inlen = zb->outlen = bufsize;
 62 2181e0c8 2019-03-19 stsp 
 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");
 66 2181e0c8 2019-03-19 stsp 		goto done;
 67 2181e0c8 2019-03-19 stsp 	}
 68 2181e0c8 2019-03-19 stsp 
 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");
 74 2181e0c8 2019-03-19 stsp 			goto done;
 75 2181e0c8 2019-03-19 stsp 		}
 76 2181e0c8 2019-03-19 stsp 		zb->flags |= GOT_DEFLATE_F_OWN_OUTBUF;
 77 2181e0c8 2019-03-19 stsp 	} else
 78 2181e0c8 2019-03-19 stsp 		zb->outbuf = outbuf;
 79 2181e0c8 2019-03-19 stsp done:
 80 2181e0c8 2019-03-19 stsp 	if (err)
 81 2181e0c8 2019-03-19 stsp 		got_deflate_end(zb);
 82 2181e0c8 2019-03-19 stsp 	return err;
 83 2181e0c8 2019-03-19 stsp }
 84 2181e0c8 2019-03-19 stsp 
 85 91b40e30 2021-05-21 stsp static void
 86 31e61ec1 2021-09-28 naddy csum_output(struct got_deflate_checksum *csum, const uint8_t *buf, size_t len)
 87 91b40e30 2021-05-21 stsp {
 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);
 90 91b40e30 2021-05-21 stsp 
 91 ae25a666 2023-02-23 op 	if (csum->output_ctx)
 92 ae25a666 2023-02-23 op 		got_hash_update(csum->output_ctx, buf, len);
 93 91b40e30 2021-05-21 stsp }
 94 91b40e30 2021-05-21 stsp 
 95 2181e0c8 2019-03-19 stsp const struct got_error *
 96 72840534 2022-01-19 stsp got_deflate_read(struct got_deflate_buf *zb, FILE *f, off_t len,
 97 72840534 2022-01-19 stsp     size_t *outlenp, off_t *consumed)
 98 2181e0c8 2019-03-19 stsp {
 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;
102 2181e0c8 2019-03-19 stsp 
103 2181e0c8 2019-03-19 stsp 	z->next_out = zb->outbuf;
104 2181e0c8 2019-03-19 stsp 	z->avail_out = zb->outlen;
105 2181e0c8 2019-03-19 stsp 
106 2181e0c8 2019-03-19 stsp 	*outlenp = 0;
107 72840534 2022-01-19 stsp 	*consumed = 0;
108 2181e0c8 2019-03-19 stsp 	do {
109 72840534 2022-01-19 stsp 		size_t last_total_in = z->total_in;
110 2181e0c8 2019-03-19 stsp 		if (z->avail_in == 0) {
111 72840534 2022-01-19 stsp 			size_t n = 0;
112 72840534 2022-01-19 stsp 			if (*consumed < len) {
113 72840534 2022-01-19 stsp 				n = fread(zb->inbuf, 1,
114 72840534 2022-01-19 stsp 				    MIN(zb->inlen, len - *consumed), f);
115 72840534 2022-01-19 stsp 			}
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);
119 2181e0c8 2019-03-19 stsp 				/* EOF */
120 4e4a7005 2019-04-13 stsp 				ret = deflate(z, Z_FINISH);
121 2181e0c8 2019-03-19 stsp 				break;
122 2181e0c8 2019-03-19 stsp 			}
123 2181e0c8 2019-03-19 stsp 			z->next_in = zb->inbuf;
124 2181e0c8 2019-03-19 stsp 			z->avail_in = n;
125 2181e0c8 2019-03-19 stsp 		}
126 2181e0c8 2019-03-19 stsp 		ret = deflate(z, Z_NO_FLUSH);
127 72840534 2022-01-19 stsp 		*consumed += z->total_in - last_total_in;
128 2181e0c8 2019-03-19 stsp 	} while (ret == Z_OK && z->avail_out > 0);
129 2181e0c8 2019-03-19 stsp 
130 2181e0c8 2019-03-19 stsp 	if (ret == Z_OK) {
131 2181e0c8 2019-03-19 stsp 		zb->flags |= GOT_DEFLATE_F_HAVE_MORE;
132 2181e0c8 2019-03-19 stsp 	} else {
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;
136 2181e0c8 2019-03-19 stsp 	}
137 2181e0c8 2019-03-19 stsp 
138 2181e0c8 2019-03-19 stsp 	*outlenp = z->total_out - last_total_out;
139 2181e0c8 2019-03-19 stsp 	return NULL;
140 2181e0c8 2019-03-19 stsp }
141 2181e0c8 2019-03-19 stsp 
142 2d9e6abf 2022-05-04 stsp static const struct got_error *
143 2d9e6abf 2022-05-04 stsp deflate_read_mmap(struct got_deflate_buf *zb, uint8_t *map, size_t offset,
144 2d9e6abf 2022-05-04 stsp     size_t len, size_t *outlenp, size_t *consumed, int flush_on_eof)
145 64a8571e 2022-01-07 stsp {
146 64a8571e 2022-01-07 stsp 	z_stream *z = &zb->z;
147 64a8571e 2022-01-07 stsp 	size_t last_total_out = z->total_out;
148 64a8571e 2022-01-07 stsp 	int ret = Z_ERRNO;
149 64a8571e 2022-01-07 stsp 
150 64a8571e 2022-01-07 stsp 	z->next_out = zb->outbuf;
151 64a8571e 2022-01-07 stsp 	z->avail_out = zb->outlen;
152 64a8571e 2022-01-07 stsp 
153 64a8571e 2022-01-07 stsp 	*outlenp = 0;
154 64a8571e 2022-01-07 stsp 	*consumed = 0;
155 64a8571e 2022-01-07 stsp 	do {
156 64a8571e 2022-01-07 stsp 		size_t last_total_in = z->total_in;
157 64a8571e 2022-01-07 stsp 		if (z->avail_in == 0) {
158 64a8571e 2022-01-07 stsp 			z->next_in = map + offset + *consumed;
159 a9bd296d 2022-02-08 stsp 			if (len - *consumed > UINT_MAX)
160 a9bd296d 2022-02-08 stsp 				z->avail_in = UINT_MAX;
161 a9bd296d 2022-02-08 stsp 			else
162 a9bd296d 2022-02-08 stsp 				z->avail_in = len - *consumed;
163 64a8571e 2022-01-07 stsp 			if (z->avail_in == 0) {
164 64a8571e 2022-01-07 stsp 				/* EOF */
165 2d9e6abf 2022-05-04 stsp 				if (flush_on_eof)
166 2d9e6abf 2022-05-04 stsp 					ret = deflate(z, Z_FINISH);
167 64a8571e 2022-01-07 stsp 				break;
168 64a8571e 2022-01-07 stsp 			}
169 64a8571e 2022-01-07 stsp 		}
170 64a8571e 2022-01-07 stsp 		ret = deflate(z, Z_NO_FLUSH);
171 64a8571e 2022-01-07 stsp 		*consumed += z->total_in - last_total_in;
172 64a8571e 2022-01-07 stsp 	} while (ret == Z_OK && z->avail_out > 0);
173 64a8571e 2022-01-07 stsp 
174 64a8571e 2022-01-07 stsp 	if (ret == Z_OK) {
175 64a8571e 2022-01-07 stsp 		zb->flags |= GOT_DEFLATE_F_HAVE_MORE;
176 64a8571e 2022-01-07 stsp 	} else {
177 64a8571e 2022-01-07 stsp 		if (ret != Z_STREAM_END)
178 64a8571e 2022-01-07 stsp 			return got_error(GOT_ERR_COMPRESSION);
179 64a8571e 2022-01-07 stsp 		zb->flags &= ~GOT_DEFLATE_F_HAVE_MORE;
180 64a8571e 2022-01-07 stsp 	}
181 64a8571e 2022-01-07 stsp 
182 64a8571e 2022-01-07 stsp 	*outlenp = z->total_out - last_total_out;
183 2d9e6abf 2022-05-04 stsp 	return NULL;
184 2d9e6abf 2022-05-04 stsp }
185 2d9e6abf 2022-05-04 stsp 
186 2d9e6abf 2022-05-04 stsp const struct got_error *
187 2d9e6abf 2022-05-04 stsp got_deflate_read_mmap(struct got_deflate_buf *zb, uint8_t *map, size_t offset,
188 2d9e6abf 2022-05-04 stsp     size_t len, size_t *outlenp, size_t *consumed)
189 2d9e6abf 2022-05-04 stsp {
190 2d9e6abf 2022-05-04 stsp 	return deflate_read_mmap(zb, map, offset, len, outlenp, consumed, 1);
191 2d9e6abf 2022-05-04 stsp }
192 2d9e6abf 2022-05-04 stsp 
193 2d9e6abf 2022-05-04 stsp const struct got_error *
194 2d9e6abf 2022-05-04 stsp got_deflate_flush(struct got_deflate_buf *zb, FILE *outfile,
195 2d9e6abf 2022-05-04 stsp     struct got_deflate_checksum *csum, off_t *outlenp)
196 2d9e6abf 2022-05-04 stsp {
197 2d9e6abf 2022-05-04 stsp 	int ret;
198 2d9e6abf 2022-05-04 stsp 	size_t n;
199 2d9e6abf 2022-05-04 stsp 	z_stream *z = &zb->z;
200 2d9e6abf 2022-05-04 stsp 
201 2d9e6abf 2022-05-04 stsp 	if (z->avail_in != 0)
202 2d9e6abf 2022-05-04 stsp 		return got_error_msg(GOT_ERR_COMPRESSION,
203 2d9e6abf 2022-05-04 stsp 		    "cannot flush zb with pending input data");
204 2d9e6abf 2022-05-04 stsp 
205 2d9e6abf 2022-05-04 stsp 	do {
206 2d9e6abf 2022-05-04 stsp 		size_t avail, last_total_out = zb->z.total_out;
207 2d9e6abf 2022-05-04 stsp 
208 2d9e6abf 2022-05-04 stsp 		z->next_out = zb->outbuf;
209 2d9e6abf 2022-05-04 stsp 		z->avail_out = zb->outlen;
210 2d9e6abf 2022-05-04 stsp 
211 2d9e6abf 2022-05-04 stsp 		ret = deflate(z, Z_FINISH);
212 2d9e6abf 2022-05-04 stsp 		if (ret != Z_STREAM_END && ret != Z_OK)
213 2d9e6abf 2022-05-04 stsp 			return got_error(GOT_ERR_COMPRESSION);
214 2d9e6abf 2022-05-04 stsp 
215 2d9e6abf 2022-05-04 stsp 		avail = z->total_out - last_total_out;
216 2d9e6abf 2022-05-04 stsp 		if (avail > 0) {
217 2d9e6abf 2022-05-04 stsp 			n = fwrite(zb->outbuf, avail, 1, outfile);
218 2d9e6abf 2022-05-04 stsp 			if (n != 1)
219 2d9e6abf 2022-05-04 stsp 				return got_ferror(outfile, GOT_ERR_IO);
220 2d9e6abf 2022-05-04 stsp 			if (csum)
221 2d9e6abf 2022-05-04 stsp 				csum_output(csum, zb->outbuf, avail);
222 2d9e6abf 2022-05-04 stsp 			if (outlenp)
223 2d9e6abf 2022-05-04 stsp 				*outlenp += avail;
224 2d9e6abf 2022-05-04 stsp 		}
225 2d9e6abf 2022-05-04 stsp 	} while (ret != Z_STREAM_END);
226 2d9e6abf 2022-05-04 stsp 
227 2d9e6abf 2022-05-04 stsp 	zb->flags &= ~GOT_DEFLATE_F_HAVE_MORE;
228 64a8571e 2022-01-07 stsp 	return NULL;
229 64a8571e 2022-01-07 stsp }
230 64a8571e 2022-01-07 stsp 
231 2181e0c8 2019-03-19 stsp void
232 2181e0c8 2019-03-19 stsp got_deflate_end(struct got_deflate_buf *zb)
233 2181e0c8 2019-03-19 stsp {
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);
238 894e4711 2022-10-15 stsp }
239 894e4711 2022-10-15 stsp 
240 894e4711 2022-10-15 stsp const struct got_error *
241 894e4711 2022-10-15 stsp got_deflate_to_fd(off_t *outlen, FILE *infile, off_t len, int outfd,
242 894e4711 2022-10-15 stsp     struct got_deflate_checksum *csum)
243 894e4711 2022-10-15 stsp {
244 894e4711 2022-10-15 stsp 	const struct got_error *err;
245 894e4711 2022-10-15 stsp 	size_t avail;
246 894e4711 2022-10-15 stsp 	off_t consumed;
247 894e4711 2022-10-15 stsp 	struct got_deflate_buf zb;
248 894e4711 2022-10-15 stsp 
249 894e4711 2022-10-15 stsp 	err = got_deflate_init(&zb, NULL, GOT_DEFLATE_BUFSIZE);
250 894e4711 2022-10-15 stsp 	if (err)
251 894e4711 2022-10-15 stsp 		goto done;
252 894e4711 2022-10-15 stsp 
253 894e4711 2022-10-15 stsp 	*outlen = 0;
254 894e4711 2022-10-15 stsp 
255 894e4711 2022-10-15 stsp 	do {
256 894e4711 2022-10-15 stsp 		err = got_deflate_read(&zb, infile, len, &avail, &consumed);
257 894e4711 2022-10-15 stsp 		if (err)
258 894e4711 2022-10-15 stsp 			goto done;
259 894e4711 2022-10-15 stsp 		len -= consumed;
260 894e4711 2022-10-15 stsp 		if (avail > 0) {
261 13b2bc37 2022-10-23 stsp 			err = got_poll_write_full(outfd, zb.outbuf, avail);
262 13b2bc37 2022-10-23 stsp 			if (err)
263 894e4711 2022-10-15 stsp 				goto done;
264 894e4711 2022-10-15 stsp 			if (csum)
265 894e4711 2022-10-15 stsp 				csum_output(csum, zb.outbuf, avail);
266 894e4711 2022-10-15 stsp 			*outlen += avail;
267 894e4711 2022-10-15 stsp 		}
268 894e4711 2022-10-15 stsp 	} while (zb.flags & GOT_DEFLATE_F_HAVE_MORE);
269 894e4711 2022-10-15 stsp 
270 894e4711 2022-10-15 stsp done:
271 894e4711 2022-10-15 stsp 	got_deflate_end(&zb);
272 894e4711 2022-10-15 stsp 	return err;
273 894e4711 2022-10-15 stsp }
274 894e4711 2022-10-15 stsp 
275 894e4711 2022-10-15 stsp const struct got_error *
276 894e4711 2022-10-15 stsp got_deflate_to_fd_mmap(off_t *outlen, uint8_t *map, size_t offset,
277 894e4711 2022-10-15 stsp     size_t len, int outfd, struct got_deflate_checksum *csum)
278 894e4711 2022-10-15 stsp {
279 894e4711 2022-10-15 stsp 	const struct got_error *err;
280 894e4711 2022-10-15 stsp 	size_t avail, consumed;
281 894e4711 2022-10-15 stsp 	struct got_deflate_buf zb;
282 894e4711 2022-10-15 stsp 
283 894e4711 2022-10-15 stsp 	err = got_deflate_init(&zb, NULL, GOT_DEFLATE_BUFSIZE);
284 894e4711 2022-10-15 stsp 	if (err)
285 894e4711 2022-10-15 stsp 		goto done;
286 894e4711 2022-10-15 stsp 
287 894e4711 2022-10-15 stsp 	*outlen = 0;
288 894e4711 2022-10-15 stsp 	do {
289 894e4711 2022-10-15 stsp 		err = got_deflate_read_mmap(&zb, map, offset, len, &avail,
290 894e4711 2022-10-15 stsp 		    &consumed);
291 894e4711 2022-10-15 stsp 		if (err)
292 894e4711 2022-10-15 stsp 			goto done;
293 894e4711 2022-10-15 stsp 		offset += consumed;
294 894e4711 2022-10-15 stsp 		len -= consumed;
295 894e4711 2022-10-15 stsp 		if (avail > 0) {
296 13b2bc37 2022-10-23 stsp 			err = got_poll_write_full(outfd, zb.outbuf, avail);
297 13b2bc37 2022-10-23 stsp 			if (err)
298 894e4711 2022-10-15 stsp 				goto done;
299 894e4711 2022-10-15 stsp 			if (csum)
300 894e4711 2022-10-15 stsp 				csum_output(csum, zb.outbuf, avail);
301 894e4711 2022-10-15 stsp 			*outlen += avail;
302 894e4711 2022-10-15 stsp 		}
303 894e4711 2022-10-15 stsp 	} while (zb.flags & GOT_DEFLATE_F_HAVE_MORE);
304 894e4711 2022-10-15 stsp 
305 894e4711 2022-10-15 stsp done:
306 894e4711 2022-10-15 stsp 	got_deflate_end(&zb);
307 894e4711 2022-10-15 stsp 	return err;
308 2181e0c8 2019-03-19 stsp }
309 2181e0c8 2019-03-19 stsp 
310 2181e0c8 2019-03-19 stsp const struct got_error *
311 72840534 2022-01-19 stsp got_deflate_to_file(off_t *outlen, FILE *infile, off_t len,
312 72840534 2022-01-19 stsp     FILE *outfile, struct got_deflate_checksum *csum)
313 2181e0c8 2019-03-19 stsp {
314 2181e0c8 2019-03-19 stsp 	const struct got_error *err;
315 2181e0c8 2019-03-19 stsp 	size_t avail;
316 72840534 2022-01-19 stsp 	off_t consumed;
317 2181e0c8 2019-03-19 stsp 	struct got_deflate_buf zb;
318 2181e0c8 2019-03-19 stsp 
319 3b9e6fcf 2021-06-05 stsp 	err = got_deflate_init(&zb, NULL, GOT_DEFLATE_BUFSIZE);
320 2181e0c8 2019-03-19 stsp 	if (err)
321 2181e0c8 2019-03-19 stsp 		goto done;
322 2181e0c8 2019-03-19 stsp 
323 2181e0c8 2019-03-19 stsp 	*outlen = 0;
324 2181e0c8 2019-03-19 stsp 
325 2181e0c8 2019-03-19 stsp 	do {
326 72840534 2022-01-19 stsp 		err = got_deflate_read(&zb, infile, len, &avail, &consumed);
327 2181e0c8 2019-03-19 stsp 		if (err)
328 2181e0c8 2019-03-19 stsp 			goto done;
329 72840534 2022-01-19 stsp 		len -= consumed;
330 2181e0c8 2019-03-19 stsp 		if (avail > 0) {
331 2181e0c8 2019-03-19 stsp 			size_t n;
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);
335 2181e0c8 2019-03-19 stsp 				goto done;
336 2181e0c8 2019-03-19 stsp 			}
337 3b9e6fcf 2021-06-05 stsp 			if (csum)
338 3b9e6fcf 2021-06-05 stsp 				csum_output(csum, zb.outbuf, avail);
339 2181e0c8 2019-03-19 stsp 			*outlen += avail;
340 2181e0c8 2019-03-19 stsp 		}
341 2181e0c8 2019-03-19 stsp 	} while (zb.flags & GOT_DEFLATE_F_HAVE_MORE);
342 2181e0c8 2019-03-19 stsp 
343 2181e0c8 2019-03-19 stsp done:
344 2181e0c8 2019-03-19 stsp 	got_deflate_end(&zb);
345 2181e0c8 2019-03-19 stsp 	return err;
346 2181e0c8 2019-03-19 stsp }
347 64a8571e 2022-01-07 stsp 
348 64a8571e 2022-01-07 stsp const struct got_error *
349 72840534 2022-01-19 stsp got_deflate_to_file_mmap(off_t *outlen, uint8_t *map, size_t offset,
350 64a8571e 2022-01-07 stsp     size_t len, FILE *outfile, struct got_deflate_checksum *csum)
351 64a8571e 2022-01-07 stsp {
352 64a8571e 2022-01-07 stsp 	const struct got_error *err;
353 64a8571e 2022-01-07 stsp 	size_t avail, consumed;
354 64a8571e 2022-01-07 stsp 	struct got_deflate_buf zb;
355 64a8571e 2022-01-07 stsp 
356 64a8571e 2022-01-07 stsp 	err = got_deflate_init(&zb, NULL, GOT_DEFLATE_BUFSIZE);
357 64a8571e 2022-01-07 stsp 	if (err)
358 64a8571e 2022-01-07 stsp 		goto done;
359 64a8571e 2022-01-07 stsp 
360 64a8571e 2022-01-07 stsp 	*outlen = 0;
361 64a8571e 2022-01-07 stsp 	do {
362 64a8571e 2022-01-07 stsp 		err = got_deflate_read_mmap(&zb, map, offset, len, &avail,
363 64a8571e 2022-01-07 stsp 		    &consumed);
364 64a8571e 2022-01-07 stsp 		if (err)
365 64a8571e 2022-01-07 stsp 			goto done;
366 64a8571e 2022-01-07 stsp 		offset += consumed;
367 64a8571e 2022-01-07 stsp 		len -= consumed;
368 64a8571e 2022-01-07 stsp 		if (avail > 0) {
369 64a8571e 2022-01-07 stsp 			size_t n;
370 64a8571e 2022-01-07 stsp 			n = fwrite(zb.outbuf, avail, 1, outfile);
371 64a8571e 2022-01-07 stsp 			if (n != 1) {
372 64a8571e 2022-01-07 stsp 				err = got_ferror(outfile, GOT_ERR_IO);
373 64a8571e 2022-01-07 stsp 				goto done;
374 64a8571e 2022-01-07 stsp 			}
375 64a8571e 2022-01-07 stsp 			if (csum)
376 64a8571e 2022-01-07 stsp 				csum_output(csum, zb.outbuf, avail);
377 64a8571e 2022-01-07 stsp 			*outlen += avail;
378 64a8571e 2022-01-07 stsp 		}
379 64a8571e 2022-01-07 stsp 	} while (zb.flags & GOT_DEFLATE_F_HAVE_MORE);
380 2d9e6abf 2022-05-04 stsp 
381 2d9e6abf 2022-05-04 stsp done:
382 2d9e6abf 2022-05-04 stsp 	got_deflate_end(&zb);
383 2d9e6abf 2022-05-04 stsp 	return err;
384 2d9e6abf 2022-05-04 stsp }
385 2d9e6abf 2022-05-04 stsp 
386 2d9e6abf 2022-05-04 stsp const struct got_error *
387 2d9e6abf 2022-05-04 stsp got_deflate_append_to_file_mmap(struct got_deflate_buf *zb, off_t *outlen,
388 2d9e6abf 2022-05-04 stsp     uint8_t *map, size_t offset, size_t len, FILE *outfile,
389 2d9e6abf 2022-05-04 stsp     struct got_deflate_checksum *csum)
390 2d9e6abf 2022-05-04 stsp {
391 2d9e6abf 2022-05-04 stsp 	const struct got_error *err;
392 2d9e6abf 2022-05-04 stsp 	size_t avail, consumed;
393 2d9e6abf 2022-05-04 stsp 
394 2d9e6abf 2022-05-04 stsp 	do {
395 2d9e6abf 2022-05-04 stsp 		err = deflate_read_mmap(zb, map, offset, len, &avail,
396 2d9e6abf 2022-05-04 stsp 		    &consumed, 0);
397 2d9e6abf 2022-05-04 stsp 		if (err)
398 2d9e6abf 2022-05-04 stsp 			break;
399 2d9e6abf 2022-05-04 stsp 		offset += consumed;
400 2d9e6abf 2022-05-04 stsp 		len -= consumed;
401 2d9e6abf 2022-05-04 stsp 		if (avail > 0) {
402 2d9e6abf 2022-05-04 stsp 			size_t n;
403 2d9e6abf 2022-05-04 stsp 			n = fwrite(zb->outbuf, avail, 1, outfile);
404 2d9e6abf 2022-05-04 stsp 			if (n != 1) {
405 2d9e6abf 2022-05-04 stsp 				err = got_ferror(outfile, GOT_ERR_IO);
406 2d9e6abf 2022-05-04 stsp 				break;
407 2d9e6abf 2022-05-04 stsp 			}
408 2d9e6abf 2022-05-04 stsp 			if (csum)
409 2d9e6abf 2022-05-04 stsp 				csum_output(csum, zb->outbuf, avail);
410 2d9e6abf 2022-05-04 stsp 			if (outlen)
411 2d9e6abf 2022-05-04 stsp 				*outlen += avail;
412 2d9e6abf 2022-05-04 stsp 		}
413 2d9e6abf 2022-05-04 stsp 	} while ((zb->flags & GOT_DEFLATE_F_HAVE_MORE) && len > 0);
414 64a8571e 2022-01-07 stsp 
415 2d9e6abf 2022-05-04 stsp 	return err;
416 2d9e6abf 2022-05-04 stsp }
417 2d9e6abf 2022-05-04 stsp 
418 2d9e6abf 2022-05-04 stsp const struct got_error *
419 2d9e6abf 2022-05-04 stsp got_deflate_to_mem_mmap(uint8_t **outbuf, size_t *outlen,
420 2d9e6abf 2022-05-04 stsp     size_t *consumed_total, struct got_deflate_checksum *csum, uint8_t *map,
421 2d9e6abf 2022-05-04 stsp     size_t offset, size_t len)
422 2d9e6abf 2022-05-04 stsp {
423 2d9e6abf 2022-05-04 stsp 	const struct got_error *err;
424 2d9e6abf 2022-05-04 stsp 	size_t avail, consumed;
425 2d9e6abf 2022-05-04 stsp 	struct got_deflate_buf zb;
426 2d9e6abf 2022-05-04 stsp 	void *newbuf;
427 2d9e6abf 2022-05-04 stsp 	size_t nbuf = 1;
428 2d9e6abf 2022-05-04 stsp 
429 2d9e6abf 2022-05-04 stsp 	if (outbuf) {
430 2d9e6abf 2022-05-04 stsp 		*outbuf = malloc(GOT_DEFLATE_BUFSIZE);
431 2d9e6abf 2022-05-04 stsp 		if (*outbuf == NULL)
432 2d9e6abf 2022-05-04 stsp 			return got_error_from_errno("malloc");
433 2d9e6abf 2022-05-04 stsp 		err = got_deflate_init(&zb, *outbuf, GOT_DEFLATE_BUFSIZE);
434 2d9e6abf 2022-05-04 stsp 		if (err) {
435 2d9e6abf 2022-05-04 stsp 			free(*outbuf);
436 2d9e6abf 2022-05-04 stsp 			*outbuf = NULL;
437 2d9e6abf 2022-05-04 stsp 			return err;
438 2d9e6abf 2022-05-04 stsp 		}
439 2d9e6abf 2022-05-04 stsp 	} else {
440 2d9e6abf 2022-05-04 stsp 		err = got_deflate_init(&zb, NULL, GOT_DEFLATE_BUFSIZE);
441 2d9e6abf 2022-05-04 stsp 		if (err)
442 2d9e6abf 2022-05-04 stsp 			return err;
443 2d9e6abf 2022-05-04 stsp 	}
444 2d9e6abf 2022-05-04 stsp 
445 2d9e6abf 2022-05-04 stsp 	*outlen = 0;
446 2d9e6abf 2022-05-04 stsp 	if (consumed_total)
447 2d9e6abf 2022-05-04 stsp 		*consumed_total = 0;
448 2d9e6abf 2022-05-04 stsp 	do {
449 2d9e6abf 2022-05-04 stsp 		err = got_deflate_read_mmap(&zb, map, offset, len, &avail,
450 2d9e6abf 2022-05-04 stsp 		    &consumed);
451 2d9e6abf 2022-05-04 stsp 		if (err)
452 2d9e6abf 2022-05-04 stsp 			goto done;
453 2d9e6abf 2022-05-04 stsp 		offset += consumed;
454 2d9e6abf 2022-05-04 stsp 		if (consumed_total)
455 2d9e6abf 2022-05-04 stsp 			*consumed_total += consumed;
456 2d9e6abf 2022-05-04 stsp 		len -= consumed;
457 2d9e6abf 2022-05-04 stsp 		if (avail > 0 && csum)
458 2d9e6abf 2022-05-04 stsp 			csum_output(csum, zb.outbuf, avail);
459 2d9e6abf 2022-05-04 stsp 		*outlen += avail;
460 2d9e6abf 2022-05-04 stsp 		if ((zb.flags & GOT_DEFLATE_F_HAVE_MORE) && outbuf != NULL) {
461 2d9e6abf 2022-05-04 stsp 			newbuf = reallocarray(*outbuf, ++nbuf,
462 2d9e6abf 2022-05-04 stsp 			    GOT_DEFLATE_BUFSIZE);
463 2d9e6abf 2022-05-04 stsp 			if (newbuf == NULL) {
464 2d9e6abf 2022-05-04 stsp 				err = got_error_from_errno("reallocarray");
465 2d9e6abf 2022-05-04 stsp 				free(*outbuf);
466 2d9e6abf 2022-05-04 stsp 				*outbuf = NULL;
467 2d9e6abf 2022-05-04 stsp 				*outlen = 0;
468 2d9e6abf 2022-05-04 stsp 				goto done;
469 2d9e6abf 2022-05-04 stsp 			}
470 2d9e6abf 2022-05-04 stsp 			*outbuf = newbuf;
471 2d9e6abf 2022-05-04 stsp 			zb.outbuf = newbuf + *outlen;
472 2d9e6abf 2022-05-04 stsp 			zb.outlen = (nbuf * GOT_DEFLATE_BUFSIZE) - *outlen;
473 2d9e6abf 2022-05-04 stsp 		}
474 2d9e6abf 2022-05-04 stsp 	} while (zb.flags & GOT_DEFLATE_F_HAVE_MORE);
475 64a8571e 2022-01-07 stsp done:
476 64a8571e 2022-01-07 stsp 	got_deflate_end(&zb);
477 64a8571e 2022-01-07 stsp 	return err;
478 64a8571e 2022-01-07 stsp }