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 8b925c6c 2022-07-16 thomas #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 <zlib.h>
 24 2181e0c8 2019-03-19 stsp #include <time.h>
 25 2181e0c8 2019-03-19 stsp 
 26 2181e0c8 2019-03-19 stsp #include "got_error.h"
 27 2181e0c8 2019-03-19 stsp #include "got_object.h"
 28 324d37e7 2019-05-11 stsp #include "got_path.h"
 29 2181e0c8 2019-03-19 stsp 
 30 2181e0c8 2019-03-19 stsp #include "got_lib_deflate.h"
 31 b16893ba 2023-02-24 thomas #include "got_lib_hash.h"
 32 3efd8e31 2022-10-23 thomas #include "got_lib_poll.h"
 33 2181e0c8 2019-03-19 stsp 
 34 2181e0c8 2019-03-19 stsp #ifndef MIN
 35 2181e0c8 2019-03-19 stsp #define	MIN(_a,_b) ((_a) < (_b) ? (_a) : (_b))
 36 2181e0c8 2019-03-19 stsp #endif
 37 2181e0c8 2019-03-19 stsp 
 38 2181e0c8 2019-03-19 stsp const struct got_error *
 39 3b9e6fcf 2021-06-05 stsp got_deflate_init(struct got_deflate_buf *zb, uint8_t *outbuf, size_t bufsize)
 40 2181e0c8 2019-03-19 stsp {
 41 2181e0c8 2019-03-19 stsp 	const struct got_error *err = NULL;
 42 2181e0c8 2019-03-19 stsp 	int zerr;
 43 2181e0c8 2019-03-19 stsp 
 44 0699dbc2 2022-11-08 thomas 	memset(zb, 0, sizeof(*zb));
 45 2181e0c8 2019-03-19 stsp 
 46 2181e0c8 2019-03-19 stsp 	zb->z.zalloc = Z_NULL;
 47 2181e0c8 2019-03-19 stsp 	zb->z.zfree = Z_NULL;
 48 2181e0c8 2019-03-19 stsp 	zerr = deflateInit(&zb->z, Z_DEFAULT_COMPRESSION);
 49 2181e0c8 2019-03-19 stsp 	if (zerr != Z_OK) {
 50 2181e0c8 2019-03-19 stsp 		if  (zerr == Z_ERRNO)
 51 638f9024 2019-05-13 stsp 			return got_error_from_errno("deflateInit");
 52 2181e0c8 2019-03-19 stsp 		if  (zerr == Z_MEM_ERROR) {
 53 2181e0c8 2019-03-19 stsp 			errno = ENOMEM;
 54 638f9024 2019-05-13 stsp 			return got_error_from_errno("deflateInit");
 55 2181e0c8 2019-03-19 stsp 		}
 56 2181e0c8 2019-03-19 stsp 		return got_error(GOT_ERR_COMPRESSION);
 57 2181e0c8 2019-03-19 stsp 	}
 58 2181e0c8 2019-03-19 stsp 
 59 2181e0c8 2019-03-19 stsp 	zb->inlen = zb->outlen = bufsize;
 60 2181e0c8 2019-03-19 stsp 
 61 2181e0c8 2019-03-19 stsp 	zb->inbuf = calloc(1, zb->inlen);
 62 2181e0c8 2019-03-19 stsp 	if (zb->inbuf == NULL) {
 63 638f9024 2019-05-13 stsp 		err = got_error_from_errno("calloc");
 64 2181e0c8 2019-03-19 stsp 		goto done;
 65 2181e0c8 2019-03-19 stsp 	}
 66 2181e0c8 2019-03-19 stsp 
 67 2181e0c8 2019-03-19 stsp 	zb->flags = 0;
 68 2181e0c8 2019-03-19 stsp 	if (outbuf == NULL) {
 69 2181e0c8 2019-03-19 stsp 		zb->outbuf = calloc(1, zb->outlen);
 70 2181e0c8 2019-03-19 stsp 		if (zb->outbuf == NULL) {
 71 638f9024 2019-05-13 stsp 			err = got_error_from_errno("calloc");
 72 2181e0c8 2019-03-19 stsp 			goto done;
 73 2181e0c8 2019-03-19 stsp 		}
 74 2181e0c8 2019-03-19 stsp 		zb->flags |= GOT_DEFLATE_F_OWN_OUTBUF;
 75 2181e0c8 2019-03-19 stsp 	} else
 76 2181e0c8 2019-03-19 stsp 		zb->outbuf = outbuf;
 77 2181e0c8 2019-03-19 stsp done:
 78 2181e0c8 2019-03-19 stsp 	if (err)
 79 2181e0c8 2019-03-19 stsp 		got_deflate_end(zb);
 80 2181e0c8 2019-03-19 stsp 	return err;
 81 2181e0c8 2019-03-19 stsp }
 82 2181e0c8 2019-03-19 stsp 
 83 91b40e30 2021-05-21 stsp static void
 84 dbaa2362 2021-09-28 thomas csum_output(struct got_deflate_checksum *csum, const uint8_t *buf, size_t len)
 85 91b40e30 2021-05-21 stsp {
 86 91b40e30 2021-05-21 stsp 	if (csum->output_crc)
 87 91b40e30 2021-05-21 stsp 		*csum->output_crc = crc32(*csum->output_crc, buf, len);
 88 91b40e30 2021-05-21 stsp 
 89 b16893ba 2023-02-24 thomas 	if (csum->output_ctx)
 90 b16893ba 2023-02-24 thomas 		got_hash_update(csum->output_ctx, buf, len);
 91 91b40e30 2021-05-21 stsp }
 92 91b40e30 2021-05-21 stsp 
 93 2181e0c8 2019-03-19 stsp const struct got_error *
 94 e8f02263 2022-01-23 thomas got_deflate_read(struct got_deflate_buf *zb, FILE *f, off_t len,
 95 e8f02263 2022-01-23 thomas     size_t *outlenp, off_t *consumed)
 96 2181e0c8 2019-03-19 stsp {
 97 2181e0c8 2019-03-19 stsp 	size_t last_total_out = zb->z.total_out;
 98 2181e0c8 2019-03-19 stsp 	z_stream *z = &zb->z;
 99 2181e0c8 2019-03-19 stsp 	int ret = Z_ERRNO;
100 2181e0c8 2019-03-19 stsp 
101 2181e0c8 2019-03-19 stsp 	z->next_out = zb->outbuf;
102 2181e0c8 2019-03-19 stsp 	z->avail_out = zb->outlen;
103 2181e0c8 2019-03-19 stsp 
104 2181e0c8 2019-03-19 stsp 	*outlenp = 0;
105 e8f02263 2022-01-23 thomas 	*consumed = 0;
106 2181e0c8 2019-03-19 stsp 	do {
107 e8f02263 2022-01-23 thomas 		size_t last_total_in = z->total_in;
108 2181e0c8 2019-03-19 stsp 		if (z->avail_in == 0) {
109 e8f02263 2022-01-23 thomas 			size_t n = 0;
110 e8f02263 2022-01-23 thomas 			if (*consumed < len) {
111 e8f02263 2022-01-23 thomas 				n = fread(zb->inbuf, 1,
112 e8f02263 2022-01-23 thomas 				    MIN(zb->inlen, len - *consumed), f);
113 e8f02263 2022-01-23 thomas 			}
114 2181e0c8 2019-03-19 stsp 			if (n == 0) {
115 2181e0c8 2019-03-19 stsp 				if (ferror(f))
116 2181e0c8 2019-03-19 stsp 					return got_ferror(f, GOT_ERR_IO);
117 2181e0c8 2019-03-19 stsp 				/* EOF */
118 4e4a7005 2019-04-13 stsp 				ret = deflate(z, Z_FINISH);
119 2181e0c8 2019-03-19 stsp 				break;
120 2181e0c8 2019-03-19 stsp 			}
121 2181e0c8 2019-03-19 stsp 			z->next_in = zb->inbuf;
122 2181e0c8 2019-03-19 stsp 			z->avail_in = n;
123 2181e0c8 2019-03-19 stsp 		}
124 2181e0c8 2019-03-19 stsp 		ret = deflate(z, Z_NO_FLUSH);
125 e8f02263 2022-01-23 thomas 		*consumed += z->total_in - last_total_in;
126 2181e0c8 2019-03-19 stsp 	} while (ret == Z_OK && z->avail_out > 0);
127 2181e0c8 2019-03-19 stsp 
128 2181e0c8 2019-03-19 stsp 	if (ret == Z_OK) {
129 2181e0c8 2019-03-19 stsp 		zb->flags |= GOT_DEFLATE_F_HAVE_MORE;
130 2181e0c8 2019-03-19 stsp 	} else {
131 2181e0c8 2019-03-19 stsp 		if (ret != Z_STREAM_END)
132 2181e0c8 2019-03-19 stsp 			return got_error(GOT_ERR_COMPRESSION);
133 2181e0c8 2019-03-19 stsp 		zb->flags &= ~GOT_DEFLATE_F_HAVE_MORE;
134 2181e0c8 2019-03-19 stsp 	}
135 2181e0c8 2019-03-19 stsp 
136 2181e0c8 2019-03-19 stsp 	*outlenp = z->total_out - last_total_out;
137 2181e0c8 2019-03-19 stsp 	return NULL;
138 2181e0c8 2019-03-19 stsp }
139 2181e0c8 2019-03-19 stsp 
140 9249e7e3 2022-05-12 thomas static const struct got_error *
141 9249e7e3 2022-05-12 thomas deflate_read_mmap(struct got_deflate_buf *zb, uint8_t *map, size_t offset,
142 9249e7e3 2022-05-12 thomas     size_t len, size_t *outlenp, size_t *consumed, int flush_on_eof)
143 2b0ae357 2022-01-10 thomas {
144 2b0ae357 2022-01-10 thomas 	z_stream *z = &zb->z;
145 2b0ae357 2022-01-10 thomas 	size_t last_total_out = z->total_out;
146 2b0ae357 2022-01-10 thomas 	int ret = Z_ERRNO;
147 2b0ae357 2022-01-10 thomas 
148 2b0ae357 2022-01-10 thomas 	z->next_out = zb->outbuf;
149 2b0ae357 2022-01-10 thomas 	z->avail_out = zb->outlen;
150 2b0ae357 2022-01-10 thomas 
151 2b0ae357 2022-01-10 thomas 	*outlenp = 0;
152 2b0ae357 2022-01-10 thomas 	*consumed = 0;
153 2b0ae357 2022-01-10 thomas 	do {
154 2b0ae357 2022-01-10 thomas 		size_t last_total_in = z->total_in;
155 2b0ae357 2022-01-10 thomas 		if (z->avail_in == 0) {
156 2b0ae357 2022-01-10 thomas 			z->next_in = map + offset + *consumed;
157 f6a55b40 2022-02-12 thomas 			if (len - *consumed > UINT_MAX)
158 f6a55b40 2022-02-12 thomas 				z->avail_in = UINT_MAX;
159 f6a55b40 2022-02-12 thomas 			else
160 f6a55b40 2022-02-12 thomas 				z->avail_in = len - *consumed;
161 2b0ae357 2022-01-10 thomas 			if (z->avail_in == 0) {
162 2b0ae357 2022-01-10 thomas 				/* EOF */
163 9249e7e3 2022-05-12 thomas 				if (flush_on_eof)
164 9249e7e3 2022-05-12 thomas 					ret = deflate(z, Z_FINISH);
165 2b0ae357 2022-01-10 thomas 				break;
166 2b0ae357 2022-01-10 thomas 			}
167 2b0ae357 2022-01-10 thomas 		}
168 2b0ae357 2022-01-10 thomas 		ret = deflate(z, Z_NO_FLUSH);
169 2b0ae357 2022-01-10 thomas 		*consumed += z->total_in - last_total_in;
170 2b0ae357 2022-01-10 thomas 	} while (ret == Z_OK && z->avail_out > 0);
171 2b0ae357 2022-01-10 thomas 
172 2b0ae357 2022-01-10 thomas 	if (ret == Z_OK) {
173 2b0ae357 2022-01-10 thomas 		zb->flags |= GOT_DEFLATE_F_HAVE_MORE;
174 2b0ae357 2022-01-10 thomas 	} else {
175 2b0ae357 2022-01-10 thomas 		if (ret != Z_STREAM_END)
176 2b0ae357 2022-01-10 thomas 			return got_error(GOT_ERR_COMPRESSION);
177 2b0ae357 2022-01-10 thomas 		zb->flags &= ~GOT_DEFLATE_F_HAVE_MORE;
178 2b0ae357 2022-01-10 thomas 	}
179 2b0ae357 2022-01-10 thomas 
180 2b0ae357 2022-01-10 thomas 	*outlenp = z->total_out - last_total_out;
181 9249e7e3 2022-05-12 thomas 	return NULL;
182 9249e7e3 2022-05-12 thomas }
183 9249e7e3 2022-05-12 thomas 
184 9249e7e3 2022-05-12 thomas const struct got_error *
185 9249e7e3 2022-05-12 thomas got_deflate_read_mmap(struct got_deflate_buf *zb, uint8_t *map, size_t offset,
186 9249e7e3 2022-05-12 thomas     size_t len, size_t *outlenp, size_t *consumed)
187 9249e7e3 2022-05-12 thomas {
188 9249e7e3 2022-05-12 thomas 	return deflate_read_mmap(zb, map, offset, len, outlenp, consumed, 1);
189 9249e7e3 2022-05-12 thomas }
190 9249e7e3 2022-05-12 thomas 
191 9249e7e3 2022-05-12 thomas const struct got_error *
192 9249e7e3 2022-05-12 thomas got_deflate_flush(struct got_deflate_buf *zb, FILE *outfile,
193 9249e7e3 2022-05-12 thomas     struct got_deflate_checksum *csum, off_t *outlenp)
194 9249e7e3 2022-05-12 thomas {
195 9249e7e3 2022-05-12 thomas 	int ret;
196 9249e7e3 2022-05-12 thomas 	size_t n;
197 9249e7e3 2022-05-12 thomas 	z_stream *z = &zb->z;
198 9249e7e3 2022-05-12 thomas 
199 9249e7e3 2022-05-12 thomas 	if (z->avail_in != 0)
200 9249e7e3 2022-05-12 thomas 		return got_error_msg(GOT_ERR_COMPRESSION,
201 9249e7e3 2022-05-12 thomas 		    "cannot flush zb with pending input data");
202 9249e7e3 2022-05-12 thomas 
203 9249e7e3 2022-05-12 thomas 	do {
204 9249e7e3 2022-05-12 thomas 		size_t avail, last_total_out = zb->z.total_out;
205 9249e7e3 2022-05-12 thomas 
206 9249e7e3 2022-05-12 thomas 		z->next_out = zb->outbuf;
207 9249e7e3 2022-05-12 thomas 		z->avail_out = zb->outlen;
208 9249e7e3 2022-05-12 thomas 
209 9249e7e3 2022-05-12 thomas 		ret = deflate(z, Z_FINISH);
210 9249e7e3 2022-05-12 thomas 		if (ret != Z_STREAM_END && ret != Z_OK)
211 9249e7e3 2022-05-12 thomas 			return got_error(GOT_ERR_COMPRESSION);
212 9249e7e3 2022-05-12 thomas 
213 9249e7e3 2022-05-12 thomas 		avail = z->total_out - last_total_out;
214 9249e7e3 2022-05-12 thomas 		if (avail > 0) {
215 9249e7e3 2022-05-12 thomas 			n = fwrite(zb->outbuf, avail, 1, outfile);
216 9249e7e3 2022-05-12 thomas 			if (n != 1)
217 9249e7e3 2022-05-12 thomas 				return got_ferror(outfile, GOT_ERR_IO);
218 9249e7e3 2022-05-12 thomas 			if (csum)
219 9249e7e3 2022-05-12 thomas 				csum_output(csum, zb->outbuf, avail);
220 9249e7e3 2022-05-12 thomas 			if (outlenp)
221 9249e7e3 2022-05-12 thomas 				*outlenp += avail;
222 9249e7e3 2022-05-12 thomas 		}
223 9249e7e3 2022-05-12 thomas 	} while (ret != Z_STREAM_END);
224 9249e7e3 2022-05-12 thomas 
225 9249e7e3 2022-05-12 thomas 	zb->flags &= ~GOT_DEFLATE_F_HAVE_MORE;
226 2b0ae357 2022-01-10 thomas 	return NULL;
227 2b0ae357 2022-01-10 thomas }
228 2b0ae357 2022-01-10 thomas 
229 2181e0c8 2019-03-19 stsp void
230 2181e0c8 2019-03-19 stsp got_deflate_end(struct got_deflate_buf *zb)
231 2181e0c8 2019-03-19 stsp {
232 2181e0c8 2019-03-19 stsp 	free(zb->inbuf);
233 2181e0c8 2019-03-19 stsp 	if (zb->flags & GOT_DEFLATE_F_OWN_OUTBUF)
234 2181e0c8 2019-03-19 stsp 		free(zb->outbuf);
235 2181e0c8 2019-03-19 stsp 	deflateEnd(&zb->z);
236 20a7d452 2022-10-16 thomas }
237 20a7d452 2022-10-16 thomas 
238 20a7d452 2022-10-16 thomas const struct got_error *
239 20a7d452 2022-10-16 thomas got_deflate_to_fd(off_t *outlen, FILE *infile, off_t len, int outfd,
240 20a7d452 2022-10-16 thomas     struct got_deflate_checksum *csum)
241 20a7d452 2022-10-16 thomas {
242 20a7d452 2022-10-16 thomas 	const struct got_error *err;
243 20a7d452 2022-10-16 thomas 	size_t avail;
244 20a7d452 2022-10-16 thomas 	off_t consumed;
245 20a7d452 2022-10-16 thomas 	struct got_deflate_buf zb;
246 20a7d452 2022-10-16 thomas 
247 20a7d452 2022-10-16 thomas 	err = got_deflate_init(&zb, NULL, GOT_DEFLATE_BUFSIZE);
248 20a7d452 2022-10-16 thomas 	if (err)
249 20a7d452 2022-10-16 thomas 		goto done;
250 20a7d452 2022-10-16 thomas 
251 20a7d452 2022-10-16 thomas 	*outlen = 0;
252 20a7d452 2022-10-16 thomas 
253 20a7d452 2022-10-16 thomas 	do {
254 20a7d452 2022-10-16 thomas 		err = got_deflate_read(&zb, infile, len, &avail, &consumed);
255 20a7d452 2022-10-16 thomas 		if (err)
256 20a7d452 2022-10-16 thomas 			goto done;
257 20a7d452 2022-10-16 thomas 		len -= consumed;
258 20a7d452 2022-10-16 thomas 		if (avail > 0) {
259 3efd8e31 2022-10-23 thomas 			err = got_poll_write_full(outfd, zb.outbuf, avail);
260 3efd8e31 2022-10-23 thomas 			if (err)
261 20a7d452 2022-10-16 thomas 				goto done;
262 20a7d452 2022-10-16 thomas 			if (csum)
263 20a7d452 2022-10-16 thomas 				csum_output(csum, zb.outbuf, avail);
264 20a7d452 2022-10-16 thomas 			*outlen += avail;
265 20a7d452 2022-10-16 thomas 		}
266 20a7d452 2022-10-16 thomas 	} while (zb.flags & GOT_DEFLATE_F_HAVE_MORE);
267 20a7d452 2022-10-16 thomas 
268 20a7d452 2022-10-16 thomas done:
269 20a7d452 2022-10-16 thomas 	got_deflate_end(&zb);
270 20a7d452 2022-10-16 thomas 	return err;
271 20a7d452 2022-10-16 thomas }
272 20a7d452 2022-10-16 thomas 
273 20a7d452 2022-10-16 thomas const struct got_error *
274 20a7d452 2022-10-16 thomas got_deflate_to_fd_mmap(off_t *outlen, uint8_t *map, size_t offset,
275 20a7d452 2022-10-16 thomas     size_t len, int outfd, struct got_deflate_checksum *csum)
276 20a7d452 2022-10-16 thomas {
277 20a7d452 2022-10-16 thomas 	const struct got_error *err;
278 20a7d452 2022-10-16 thomas 	size_t avail, consumed;
279 20a7d452 2022-10-16 thomas 	struct got_deflate_buf zb;
280 20a7d452 2022-10-16 thomas 
281 20a7d452 2022-10-16 thomas 	err = got_deflate_init(&zb, NULL, GOT_DEFLATE_BUFSIZE);
282 20a7d452 2022-10-16 thomas 	if (err)
283 20a7d452 2022-10-16 thomas 		goto done;
284 20a7d452 2022-10-16 thomas 
285 20a7d452 2022-10-16 thomas 	*outlen = 0;
286 20a7d452 2022-10-16 thomas 	do {
287 20a7d452 2022-10-16 thomas 		err = got_deflate_read_mmap(&zb, map, offset, len, &avail,
288 20a7d452 2022-10-16 thomas 		    &consumed);
289 20a7d452 2022-10-16 thomas 		if (err)
290 20a7d452 2022-10-16 thomas 			goto done;
291 20a7d452 2022-10-16 thomas 		offset += consumed;
292 20a7d452 2022-10-16 thomas 		len -= consumed;
293 20a7d452 2022-10-16 thomas 		if (avail > 0) {
294 3efd8e31 2022-10-23 thomas 			err = got_poll_write_full(outfd, zb.outbuf, avail);
295 3efd8e31 2022-10-23 thomas 			if (err)
296 20a7d452 2022-10-16 thomas 				goto done;
297 20a7d452 2022-10-16 thomas 			if (csum)
298 20a7d452 2022-10-16 thomas 				csum_output(csum, zb.outbuf, avail);
299 20a7d452 2022-10-16 thomas 			*outlen += avail;
300 20a7d452 2022-10-16 thomas 		}
301 20a7d452 2022-10-16 thomas 	} while (zb.flags & GOT_DEFLATE_F_HAVE_MORE);
302 20a7d452 2022-10-16 thomas 
303 20a7d452 2022-10-16 thomas done:
304 20a7d452 2022-10-16 thomas 	got_deflate_end(&zb);
305 20a7d452 2022-10-16 thomas 	return err;
306 2181e0c8 2019-03-19 stsp }
307 2181e0c8 2019-03-19 stsp 
308 2181e0c8 2019-03-19 stsp const struct got_error *
309 e8f02263 2022-01-23 thomas got_deflate_to_file(off_t *outlen, FILE *infile, off_t len,
310 e8f02263 2022-01-23 thomas     FILE *outfile, struct got_deflate_checksum *csum)
311 2181e0c8 2019-03-19 stsp {
312 2181e0c8 2019-03-19 stsp 	const struct got_error *err;
313 2181e0c8 2019-03-19 stsp 	size_t avail;
314 e8f02263 2022-01-23 thomas 	off_t consumed;
315 2181e0c8 2019-03-19 stsp 	struct got_deflate_buf zb;
316 2181e0c8 2019-03-19 stsp 
317 3b9e6fcf 2021-06-05 stsp 	err = got_deflate_init(&zb, NULL, GOT_DEFLATE_BUFSIZE);
318 2181e0c8 2019-03-19 stsp 	if (err)
319 2181e0c8 2019-03-19 stsp 		goto done;
320 2181e0c8 2019-03-19 stsp 
321 2181e0c8 2019-03-19 stsp 	*outlen = 0;
322 2181e0c8 2019-03-19 stsp 
323 2181e0c8 2019-03-19 stsp 	do {
324 e8f02263 2022-01-23 thomas 		err = got_deflate_read(&zb, infile, len, &avail, &consumed);
325 2181e0c8 2019-03-19 stsp 		if (err)
326 2181e0c8 2019-03-19 stsp 			goto done;
327 e8f02263 2022-01-23 thomas 		len -= consumed;
328 2181e0c8 2019-03-19 stsp 		if (avail > 0) {
329 2181e0c8 2019-03-19 stsp 			size_t n;
330 2181e0c8 2019-03-19 stsp 			n = fwrite(zb.outbuf, avail, 1, outfile);
331 2181e0c8 2019-03-19 stsp 			if (n != 1) {
332 2181e0c8 2019-03-19 stsp 				err = got_ferror(outfile, GOT_ERR_IO);
333 2181e0c8 2019-03-19 stsp 				goto done;
334 2181e0c8 2019-03-19 stsp 			}
335 3b9e6fcf 2021-06-05 stsp 			if (csum)
336 3b9e6fcf 2021-06-05 stsp 				csum_output(csum, zb.outbuf, avail);
337 2181e0c8 2019-03-19 stsp 			*outlen += avail;
338 2181e0c8 2019-03-19 stsp 		}
339 2181e0c8 2019-03-19 stsp 	} while (zb.flags & GOT_DEFLATE_F_HAVE_MORE);
340 2181e0c8 2019-03-19 stsp 
341 2181e0c8 2019-03-19 stsp done:
342 2181e0c8 2019-03-19 stsp 	got_deflate_end(&zb);
343 2181e0c8 2019-03-19 stsp 	return err;
344 2181e0c8 2019-03-19 stsp }
345 2b0ae357 2022-01-10 thomas 
346 2b0ae357 2022-01-10 thomas const struct got_error *
347 e8f02263 2022-01-23 thomas got_deflate_to_file_mmap(off_t *outlen, uint8_t *map, size_t offset,
348 2b0ae357 2022-01-10 thomas     size_t len, FILE *outfile, struct got_deflate_checksum *csum)
349 2b0ae357 2022-01-10 thomas {
350 2b0ae357 2022-01-10 thomas 	const struct got_error *err;
351 2b0ae357 2022-01-10 thomas 	size_t avail, consumed;
352 2b0ae357 2022-01-10 thomas 	struct got_deflate_buf zb;
353 2b0ae357 2022-01-10 thomas 
354 2b0ae357 2022-01-10 thomas 	err = got_deflate_init(&zb, NULL, GOT_DEFLATE_BUFSIZE);
355 2b0ae357 2022-01-10 thomas 	if (err)
356 2b0ae357 2022-01-10 thomas 		goto done;
357 2b0ae357 2022-01-10 thomas 
358 2b0ae357 2022-01-10 thomas 	*outlen = 0;
359 2b0ae357 2022-01-10 thomas 	do {
360 2b0ae357 2022-01-10 thomas 		err = got_deflate_read_mmap(&zb, map, offset, len, &avail,
361 2b0ae357 2022-01-10 thomas 		    &consumed);
362 2b0ae357 2022-01-10 thomas 		if (err)
363 2b0ae357 2022-01-10 thomas 			goto done;
364 2b0ae357 2022-01-10 thomas 		offset += consumed;
365 2b0ae357 2022-01-10 thomas 		len -= consumed;
366 2b0ae357 2022-01-10 thomas 		if (avail > 0) {
367 2b0ae357 2022-01-10 thomas 			size_t n;
368 2b0ae357 2022-01-10 thomas 			n = fwrite(zb.outbuf, avail, 1, outfile);
369 2b0ae357 2022-01-10 thomas 			if (n != 1) {
370 2b0ae357 2022-01-10 thomas 				err = got_ferror(outfile, GOT_ERR_IO);
371 2b0ae357 2022-01-10 thomas 				goto done;
372 2b0ae357 2022-01-10 thomas 			}
373 2b0ae357 2022-01-10 thomas 			if (csum)
374 2b0ae357 2022-01-10 thomas 				csum_output(csum, zb.outbuf, avail);
375 2b0ae357 2022-01-10 thomas 			*outlen += avail;
376 2b0ae357 2022-01-10 thomas 		}
377 2b0ae357 2022-01-10 thomas 	} while (zb.flags & GOT_DEFLATE_F_HAVE_MORE);
378 9249e7e3 2022-05-12 thomas 
379 9249e7e3 2022-05-12 thomas done:
380 9249e7e3 2022-05-12 thomas 	got_deflate_end(&zb);
381 9249e7e3 2022-05-12 thomas 	return err;
382 9249e7e3 2022-05-12 thomas }
383 9249e7e3 2022-05-12 thomas 
384 9249e7e3 2022-05-12 thomas const struct got_error *
385 9249e7e3 2022-05-12 thomas got_deflate_append_to_file_mmap(struct got_deflate_buf *zb, off_t *outlen,
386 9249e7e3 2022-05-12 thomas     uint8_t *map, size_t offset, size_t len, FILE *outfile,
387 9249e7e3 2022-05-12 thomas     struct got_deflate_checksum *csum)
388 9249e7e3 2022-05-12 thomas {
389 9249e7e3 2022-05-12 thomas 	const struct got_error *err;
390 9249e7e3 2022-05-12 thomas 	size_t avail, consumed;
391 9249e7e3 2022-05-12 thomas 
392 9249e7e3 2022-05-12 thomas 	do {
393 9249e7e3 2022-05-12 thomas 		err = deflate_read_mmap(zb, map, offset, len, &avail,
394 9249e7e3 2022-05-12 thomas 		    &consumed, 0);
395 9249e7e3 2022-05-12 thomas 		if (err)
396 9249e7e3 2022-05-12 thomas 			break;
397 9249e7e3 2022-05-12 thomas 		offset += consumed;
398 9249e7e3 2022-05-12 thomas 		len -= consumed;
399 9249e7e3 2022-05-12 thomas 		if (avail > 0) {
400 9249e7e3 2022-05-12 thomas 			size_t n;
401 9249e7e3 2022-05-12 thomas 			n = fwrite(zb->outbuf, avail, 1, outfile);
402 9249e7e3 2022-05-12 thomas 			if (n != 1) {
403 9249e7e3 2022-05-12 thomas 				err = got_ferror(outfile, GOT_ERR_IO);
404 9249e7e3 2022-05-12 thomas 				break;
405 9249e7e3 2022-05-12 thomas 			}
406 9249e7e3 2022-05-12 thomas 			if (csum)
407 9249e7e3 2022-05-12 thomas 				csum_output(csum, zb->outbuf, avail);
408 9249e7e3 2022-05-12 thomas 			if (outlen)
409 9249e7e3 2022-05-12 thomas 				*outlen += avail;
410 9249e7e3 2022-05-12 thomas 		}
411 9249e7e3 2022-05-12 thomas 	} while ((zb->flags & GOT_DEFLATE_F_HAVE_MORE) && len > 0);
412 2b0ae357 2022-01-10 thomas 
413 9249e7e3 2022-05-12 thomas 	return err;
414 9249e7e3 2022-05-12 thomas }
415 9249e7e3 2022-05-12 thomas 
416 9249e7e3 2022-05-12 thomas const struct got_error *
417 9249e7e3 2022-05-12 thomas got_deflate_to_mem_mmap(uint8_t **outbuf, size_t *outlen,
418 9249e7e3 2022-05-12 thomas     size_t *consumed_total, struct got_deflate_checksum *csum, uint8_t *map,
419 9249e7e3 2022-05-12 thomas     size_t offset, size_t len)
420 9249e7e3 2022-05-12 thomas {
421 9249e7e3 2022-05-12 thomas 	const struct got_error *err;
422 9249e7e3 2022-05-12 thomas 	size_t avail, consumed;
423 9249e7e3 2022-05-12 thomas 	struct got_deflate_buf zb;
424 9249e7e3 2022-05-12 thomas 	void *newbuf;
425 9249e7e3 2022-05-12 thomas 	size_t nbuf = 1;
426 9249e7e3 2022-05-12 thomas 
427 9249e7e3 2022-05-12 thomas 	if (outbuf) {
428 9249e7e3 2022-05-12 thomas 		*outbuf = malloc(GOT_DEFLATE_BUFSIZE);
429 9249e7e3 2022-05-12 thomas 		if (*outbuf == NULL)
430 9249e7e3 2022-05-12 thomas 			return got_error_from_errno("malloc");
431 9249e7e3 2022-05-12 thomas 		err = got_deflate_init(&zb, *outbuf, GOT_DEFLATE_BUFSIZE);
432 9249e7e3 2022-05-12 thomas 		if (err) {
433 9249e7e3 2022-05-12 thomas 			free(*outbuf);
434 9249e7e3 2022-05-12 thomas 			*outbuf = NULL;
435 9249e7e3 2022-05-12 thomas 			return err;
436 9249e7e3 2022-05-12 thomas 		}
437 9249e7e3 2022-05-12 thomas 	} else {
438 9249e7e3 2022-05-12 thomas 		err = got_deflate_init(&zb, NULL, GOT_DEFLATE_BUFSIZE);
439 9249e7e3 2022-05-12 thomas 		if (err)
440 9249e7e3 2022-05-12 thomas 			return err;
441 9249e7e3 2022-05-12 thomas 	}
442 9249e7e3 2022-05-12 thomas 
443 9249e7e3 2022-05-12 thomas 	*outlen = 0;
444 9249e7e3 2022-05-12 thomas 	if (consumed_total)
445 9249e7e3 2022-05-12 thomas 		*consumed_total = 0;
446 9249e7e3 2022-05-12 thomas 	do {
447 9249e7e3 2022-05-12 thomas 		err = got_deflate_read_mmap(&zb, map, offset, len, &avail,
448 9249e7e3 2022-05-12 thomas 		    &consumed);
449 9249e7e3 2022-05-12 thomas 		if (err)
450 9249e7e3 2022-05-12 thomas 			goto done;
451 9249e7e3 2022-05-12 thomas 		offset += consumed;
452 9249e7e3 2022-05-12 thomas 		if (consumed_total)
453 9249e7e3 2022-05-12 thomas 			*consumed_total += consumed;
454 9249e7e3 2022-05-12 thomas 		len -= consumed;
455 9249e7e3 2022-05-12 thomas 		if (avail > 0 && csum)
456 9249e7e3 2022-05-12 thomas 			csum_output(csum, zb.outbuf, avail);
457 9249e7e3 2022-05-12 thomas 		*outlen += avail;
458 9249e7e3 2022-05-12 thomas 		if ((zb.flags & GOT_DEFLATE_F_HAVE_MORE) && outbuf != NULL) {
459 9249e7e3 2022-05-12 thomas 			newbuf = reallocarray(*outbuf, ++nbuf,
460 9249e7e3 2022-05-12 thomas 			    GOT_DEFLATE_BUFSIZE);
461 9249e7e3 2022-05-12 thomas 			if (newbuf == NULL) {
462 9249e7e3 2022-05-12 thomas 				err = got_error_from_errno("reallocarray");
463 9249e7e3 2022-05-12 thomas 				free(*outbuf);
464 9249e7e3 2022-05-12 thomas 				*outbuf = NULL;
465 9249e7e3 2022-05-12 thomas 				*outlen = 0;
466 9249e7e3 2022-05-12 thomas 				goto done;
467 9249e7e3 2022-05-12 thomas 			}
468 9249e7e3 2022-05-12 thomas 			*outbuf = newbuf;
469 9249e7e3 2022-05-12 thomas 			zb.outbuf = newbuf + *outlen;
470 9249e7e3 2022-05-12 thomas 			zb.outlen = (nbuf * GOT_DEFLATE_BUFSIZE) - *outlen;
471 9249e7e3 2022-05-12 thomas 		}
472 9249e7e3 2022-05-12 thomas 	} while (zb.flags & GOT_DEFLATE_F_HAVE_MORE);
473 2b0ae357 2022-01-10 thomas done:
474 2b0ae357 2022-01-10 thomas 	got_deflate_end(&zb);
475 2b0ae357 2022-01-10 thomas 	return err;
476 2b0ae357 2022-01-10 thomas }