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 3efd8e31 2022-10-23 thomas #include "got_lib_poll.h"
 32 2181e0c8 2019-03-19 stsp 
 33 2181e0c8 2019-03-19 stsp #ifndef MIN
 34 2181e0c8 2019-03-19 stsp #define	MIN(_a,_b) ((_a) < (_b) ? (_a) : (_b))
 35 2181e0c8 2019-03-19 stsp #endif
 36 2181e0c8 2019-03-19 stsp 
 37 2181e0c8 2019-03-19 stsp const struct got_error *
 38 3b9e6fcf 2021-06-05 stsp got_deflate_init(struct got_deflate_buf *zb, uint8_t *outbuf, size_t bufsize)
 39 2181e0c8 2019-03-19 stsp {
 40 2181e0c8 2019-03-19 stsp 	const struct got_error *err = NULL;
 41 2181e0c8 2019-03-19 stsp 	int zerr;
 42 2181e0c8 2019-03-19 stsp 
 43 0699dbc2 2022-11-08 thomas 	memset(zb, 0, sizeof(*zb));
 44 2181e0c8 2019-03-19 stsp 
 45 2181e0c8 2019-03-19 stsp 	zb->z.zalloc = Z_NULL;
 46 2181e0c8 2019-03-19 stsp 	zb->z.zfree = Z_NULL;
 47 2181e0c8 2019-03-19 stsp 	zerr = deflateInit(&zb->z, Z_DEFAULT_COMPRESSION);
 48 2181e0c8 2019-03-19 stsp 	if (zerr != Z_OK) {
 49 2181e0c8 2019-03-19 stsp 		if  (zerr == Z_ERRNO)
 50 638f9024 2019-05-13 stsp 			return got_error_from_errno("deflateInit");
 51 2181e0c8 2019-03-19 stsp 		if  (zerr == Z_MEM_ERROR) {
 52 2181e0c8 2019-03-19 stsp 			errno = ENOMEM;
 53 638f9024 2019-05-13 stsp 			return got_error_from_errno("deflateInit");
 54 2181e0c8 2019-03-19 stsp 		}
 55 2181e0c8 2019-03-19 stsp 		return got_error(GOT_ERR_COMPRESSION);
 56 2181e0c8 2019-03-19 stsp 	}
 57 2181e0c8 2019-03-19 stsp 
 58 2181e0c8 2019-03-19 stsp 	zb->inlen = zb->outlen = bufsize;
 59 2181e0c8 2019-03-19 stsp 
 60 2181e0c8 2019-03-19 stsp 	zb->inbuf = calloc(1, zb->inlen);
 61 2181e0c8 2019-03-19 stsp 	if (zb->inbuf == NULL) {
 62 638f9024 2019-05-13 stsp 		err = got_error_from_errno("calloc");
 63 2181e0c8 2019-03-19 stsp 		goto done;
 64 2181e0c8 2019-03-19 stsp 	}
 65 2181e0c8 2019-03-19 stsp 
 66 2181e0c8 2019-03-19 stsp 	zb->flags = 0;
 67 2181e0c8 2019-03-19 stsp 	if (outbuf == NULL) {
 68 2181e0c8 2019-03-19 stsp 		zb->outbuf = calloc(1, zb->outlen);
 69 2181e0c8 2019-03-19 stsp 		if (zb->outbuf == NULL) {
 70 638f9024 2019-05-13 stsp 			err = got_error_from_errno("calloc");
 71 2181e0c8 2019-03-19 stsp 			goto done;
 72 2181e0c8 2019-03-19 stsp 		}
 73 2181e0c8 2019-03-19 stsp 		zb->flags |= GOT_DEFLATE_F_OWN_OUTBUF;
 74 2181e0c8 2019-03-19 stsp 	} else
 75 2181e0c8 2019-03-19 stsp 		zb->outbuf = outbuf;
 76 2181e0c8 2019-03-19 stsp done:
 77 2181e0c8 2019-03-19 stsp 	if (err)
 78 2181e0c8 2019-03-19 stsp 		got_deflate_end(zb);
 79 2181e0c8 2019-03-19 stsp 	return err;
 80 2181e0c8 2019-03-19 stsp }
 81 2181e0c8 2019-03-19 stsp 
 82 91b40e30 2021-05-21 stsp static void
 83 dbaa2362 2021-09-28 thomas csum_output(struct got_deflate_checksum *csum, const uint8_t *buf, size_t len)
 84 91b40e30 2021-05-21 stsp {
 85 91b40e30 2021-05-21 stsp 	if (csum->output_crc)
 86 91b40e30 2021-05-21 stsp 		*csum->output_crc = crc32(*csum->output_crc, buf, len);
 87 91b40e30 2021-05-21 stsp 
 88 91b40e30 2021-05-21 stsp 	if (csum->output_sha1)
 89 91b40e30 2021-05-21 stsp 		SHA1Update(csum->output_sha1, buf, len);
 90 91b40e30 2021-05-21 stsp }
 91 91b40e30 2021-05-21 stsp 
 92 2181e0c8 2019-03-19 stsp const struct got_error *
 93 e8f02263 2022-01-23 thomas got_deflate_read(struct got_deflate_buf *zb, FILE *f, off_t len,
 94 e8f02263 2022-01-23 thomas     size_t *outlenp, off_t *consumed)
 95 2181e0c8 2019-03-19 stsp {
 96 2181e0c8 2019-03-19 stsp 	size_t last_total_out = zb->z.total_out;
 97 2181e0c8 2019-03-19 stsp 	z_stream *z = &zb->z;
 98 2181e0c8 2019-03-19 stsp 	int ret = Z_ERRNO;
 99 2181e0c8 2019-03-19 stsp 
100 2181e0c8 2019-03-19 stsp 	z->next_out = zb->outbuf;
101 2181e0c8 2019-03-19 stsp 	z->avail_out = zb->outlen;
102 2181e0c8 2019-03-19 stsp 
103 2181e0c8 2019-03-19 stsp 	*outlenp = 0;
104 e8f02263 2022-01-23 thomas 	*consumed = 0;
105 2181e0c8 2019-03-19 stsp 	do {
106 e8f02263 2022-01-23 thomas 		size_t last_total_in = z->total_in;
107 2181e0c8 2019-03-19 stsp 		if (z->avail_in == 0) {
108 e8f02263 2022-01-23 thomas 			size_t n = 0;
109 e8f02263 2022-01-23 thomas 			if (*consumed < len) {
110 e8f02263 2022-01-23 thomas 				n = fread(zb->inbuf, 1,
111 e8f02263 2022-01-23 thomas 				    MIN(zb->inlen, len - *consumed), f);
112 e8f02263 2022-01-23 thomas 			}
113 2181e0c8 2019-03-19 stsp 			if (n == 0) {
114 2181e0c8 2019-03-19 stsp 				if (ferror(f))
115 2181e0c8 2019-03-19 stsp 					return got_ferror(f, GOT_ERR_IO);
116 2181e0c8 2019-03-19 stsp 				/* EOF */
117 4e4a7005 2019-04-13 stsp 				ret = deflate(z, Z_FINISH);
118 2181e0c8 2019-03-19 stsp 				break;
119 2181e0c8 2019-03-19 stsp 			}
120 2181e0c8 2019-03-19 stsp 			z->next_in = zb->inbuf;
121 2181e0c8 2019-03-19 stsp 			z->avail_in = n;
122 2181e0c8 2019-03-19 stsp 		}
123 2181e0c8 2019-03-19 stsp 		ret = deflate(z, Z_NO_FLUSH);
124 e8f02263 2022-01-23 thomas 		*consumed += z->total_in - last_total_in;
125 2181e0c8 2019-03-19 stsp 	} while (ret == Z_OK && z->avail_out > 0);
126 2181e0c8 2019-03-19 stsp 
127 2181e0c8 2019-03-19 stsp 	if (ret == Z_OK) {
128 2181e0c8 2019-03-19 stsp 		zb->flags |= GOT_DEFLATE_F_HAVE_MORE;
129 2181e0c8 2019-03-19 stsp 	} else {
130 2181e0c8 2019-03-19 stsp 		if (ret != Z_STREAM_END)
131 2181e0c8 2019-03-19 stsp 			return got_error(GOT_ERR_COMPRESSION);
132 2181e0c8 2019-03-19 stsp 		zb->flags &= ~GOT_DEFLATE_F_HAVE_MORE;
133 2181e0c8 2019-03-19 stsp 	}
134 2181e0c8 2019-03-19 stsp 
135 2181e0c8 2019-03-19 stsp 	*outlenp = z->total_out - last_total_out;
136 2181e0c8 2019-03-19 stsp 	return NULL;
137 2181e0c8 2019-03-19 stsp }
138 2181e0c8 2019-03-19 stsp 
139 9249e7e3 2022-05-12 thomas static const struct got_error *
140 9249e7e3 2022-05-12 thomas deflate_read_mmap(struct got_deflate_buf *zb, uint8_t *map, size_t offset,
141 9249e7e3 2022-05-12 thomas     size_t len, size_t *outlenp, size_t *consumed, int flush_on_eof)
142 2b0ae357 2022-01-10 thomas {
143 2b0ae357 2022-01-10 thomas 	z_stream *z = &zb->z;
144 2b0ae357 2022-01-10 thomas 	size_t last_total_out = z->total_out;
145 2b0ae357 2022-01-10 thomas 	int ret = Z_ERRNO;
146 2b0ae357 2022-01-10 thomas 
147 2b0ae357 2022-01-10 thomas 	z->next_out = zb->outbuf;
148 2b0ae357 2022-01-10 thomas 	z->avail_out = zb->outlen;
149 2b0ae357 2022-01-10 thomas 
150 2b0ae357 2022-01-10 thomas 	*outlenp = 0;
151 2b0ae357 2022-01-10 thomas 	*consumed = 0;
152 2b0ae357 2022-01-10 thomas 	do {
153 2b0ae357 2022-01-10 thomas 		size_t last_total_in = z->total_in;
154 2b0ae357 2022-01-10 thomas 		if (z->avail_in == 0) {
155 2b0ae357 2022-01-10 thomas 			z->next_in = map + offset + *consumed;
156 f6a55b40 2022-02-12 thomas 			if (len - *consumed > UINT_MAX)
157 f6a55b40 2022-02-12 thomas 				z->avail_in = UINT_MAX;
158 f6a55b40 2022-02-12 thomas 			else
159 f6a55b40 2022-02-12 thomas 				z->avail_in = len - *consumed;
160 2b0ae357 2022-01-10 thomas 			if (z->avail_in == 0) {
161 2b0ae357 2022-01-10 thomas 				/* EOF */
162 9249e7e3 2022-05-12 thomas 				if (flush_on_eof)
163 9249e7e3 2022-05-12 thomas 					ret = deflate(z, Z_FINISH);
164 2b0ae357 2022-01-10 thomas 				break;
165 2b0ae357 2022-01-10 thomas 			}
166 2b0ae357 2022-01-10 thomas 		}
167 2b0ae357 2022-01-10 thomas 		ret = deflate(z, Z_NO_FLUSH);
168 2b0ae357 2022-01-10 thomas 		*consumed += z->total_in - last_total_in;
169 2b0ae357 2022-01-10 thomas 	} while (ret == Z_OK && z->avail_out > 0);
170 2b0ae357 2022-01-10 thomas 
171 2b0ae357 2022-01-10 thomas 	if (ret == Z_OK) {
172 2b0ae357 2022-01-10 thomas 		zb->flags |= GOT_DEFLATE_F_HAVE_MORE;
173 2b0ae357 2022-01-10 thomas 	} else {
174 2b0ae357 2022-01-10 thomas 		if (ret != Z_STREAM_END)
175 2b0ae357 2022-01-10 thomas 			return got_error(GOT_ERR_COMPRESSION);
176 2b0ae357 2022-01-10 thomas 		zb->flags &= ~GOT_DEFLATE_F_HAVE_MORE;
177 2b0ae357 2022-01-10 thomas 	}
178 2b0ae357 2022-01-10 thomas 
179 2b0ae357 2022-01-10 thomas 	*outlenp = z->total_out - last_total_out;
180 9249e7e3 2022-05-12 thomas 	return NULL;
181 9249e7e3 2022-05-12 thomas }
182 9249e7e3 2022-05-12 thomas 
183 9249e7e3 2022-05-12 thomas const struct got_error *
184 9249e7e3 2022-05-12 thomas got_deflate_read_mmap(struct got_deflate_buf *zb, uint8_t *map, size_t offset,
185 9249e7e3 2022-05-12 thomas     size_t len, size_t *outlenp, size_t *consumed)
186 9249e7e3 2022-05-12 thomas {
187 9249e7e3 2022-05-12 thomas 	return deflate_read_mmap(zb, map, offset, len, outlenp, consumed, 1);
188 9249e7e3 2022-05-12 thomas }
189 9249e7e3 2022-05-12 thomas 
190 9249e7e3 2022-05-12 thomas const struct got_error *
191 9249e7e3 2022-05-12 thomas got_deflate_flush(struct got_deflate_buf *zb, FILE *outfile,
192 9249e7e3 2022-05-12 thomas     struct got_deflate_checksum *csum, off_t *outlenp)
193 9249e7e3 2022-05-12 thomas {
194 9249e7e3 2022-05-12 thomas 	int ret;
195 9249e7e3 2022-05-12 thomas 	size_t n;
196 9249e7e3 2022-05-12 thomas 	z_stream *z = &zb->z;
197 9249e7e3 2022-05-12 thomas 
198 9249e7e3 2022-05-12 thomas 	if (z->avail_in != 0)
199 9249e7e3 2022-05-12 thomas 		return got_error_msg(GOT_ERR_COMPRESSION,
200 9249e7e3 2022-05-12 thomas 		    "cannot flush zb with pending input data");
201 9249e7e3 2022-05-12 thomas 
202 9249e7e3 2022-05-12 thomas 	do {
203 9249e7e3 2022-05-12 thomas 		size_t avail, last_total_out = zb->z.total_out;
204 9249e7e3 2022-05-12 thomas 
205 9249e7e3 2022-05-12 thomas 		z->next_out = zb->outbuf;
206 9249e7e3 2022-05-12 thomas 		z->avail_out = zb->outlen;
207 9249e7e3 2022-05-12 thomas 
208 9249e7e3 2022-05-12 thomas 		ret = deflate(z, Z_FINISH);
209 9249e7e3 2022-05-12 thomas 		if (ret != Z_STREAM_END && ret != Z_OK)
210 9249e7e3 2022-05-12 thomas 			return got_error(GOT_ERR_COMPRESSION);
211 9249e7e3 2022-05-12 thomas 
212 9249e7e3 2022-05-12 thomas 		avail = z->total_out - last_total_out;
213 9249e7e3 2022-05-12 thomas 		if (avail > 0) {
214 9249e7e3 2022-05-12 thomas 			n = fwrite(zb->outbuf, avail, 1, outfile);
215 9249e7e3 2022-05-12 thomas 			if (n != 1)
216 9249e7e3 2022-05-12 thomas 				return got_ferror(outfile, GOT_ERR_IO);
217 9249e7e3 2022-05-12 thomas 			if (csum)
218 9249e7e3 2022-05-12 thomas 				csum_output(csum, zb->outbuf, avail);
219 9249e7e3 2022-05-12 thomas 			if (outlenp)
220 9249e7e3 2022-05-12 thomas 				*outlenp += avail;
221 9249e7e3 2022-05-12 thomas 		}
222 9249e7e3 2022-05-12 thomas 	} while (ret != Z_STREAM_END);
223 9249e7e3 2022-05-12 thomas 
224 9249e7e3 2022-05-12 thomas 	zb->flags &= ~GOT_DEFLATE_F_HAVE_MORE;
225 2b0ae357 2022-01-10 thomas 	return NULL;
226 2b0ae357 2022-01-10 thomas }
227 2b0ae357 2022-01-10 thomas 
228 2181e0c8 2019-03-19 stsp void
229 2181e0c8 2019-03-19 stsp got_deflate_end(struct got_deflate_buf *zb)
230 2181e0c8 2019-03-19 stsp {
231 2181e0c8 2019-03-19 stsp 	free(zb->inbuf);
232 2181e0c8 2019-03-19 stsp 	if (zb->flags & GOT_DEFLATE_F_OWN_OUTBUF)
233 2181e0c8 2019-03-19 stsp 		free(zb->outbuf);
234 2181e0c8 2019-03-19 stsp 	deflateEnd(&zb->z);
235 20a7d452 2022-10-16 thomas }
236 20a7d452 2022-10-16 thomas 
237 20a7d452 2022-10-16 thomas const struct got_error *
238 20a7d452 2022-10-16 thomas got_deflate_to_fd(off_t *outlen, FILE *infile, off_t len, int outfd,
239 20a7d452 2022-10-16 thomas     struct got_deflate_checksum *csum)
240 20a7d452 2022-10-16 thomas {
241 20a7d452 2022-10-16 thomas 	const struct got_error *err;
242 20a7d452 2022-10-16 thomas 	size_t avail;
243 20a7d452 2022-10-16 thomas 	off_t consumed;
244 20a7d452 2022-10-16 thomas 	struct got_deflate_buf zb;
245 20a7d452 2022-10-16 thomas 
246 20a7d452 2022-10-16 thomas 	err = got_deflate_init(&zb, NULL, GOT_DEFLATE_BUFSIZE);
247 20a7d452 2022-10-16 thomas 	if (err)
248 20a7d452 2022-10-16 thomas 		goto done;
249 20a7d452 2022-10-16 thomas 
250 20a7d452 2022-10-16 thomas 	*outlen = 0;
251 20a7d452 2022-10-16 thomas 
252 20a7d452 2022-10-16 thomas 	do {
253 20a7d452 2022-10-16 thomas 		err = got_deflate_read(&zb, infile, len, &avail, &consumed);
254 20a7d452 2022-10-16 thomas 		if (err)
255 20a7d452 2022-10-16 thomas 			goto done;
256 20a7d452 2022-10-16 thomas 		len -= consumed;
257 20a7d452 2022-10-16 thomas 		if (avail > 0) {
258 3efd8e31 2022-10-23 thomas 			err = got_poll_write_full(outfd, zb.outbuf, avail);
259 3efd8e31 2022-10-23 thomas 			if (err)
260 20a7d452 2022-10-16 thomas 				goto done;
261 20a7d452 2022-10-16 thomas 			if (csum)
262 20a7d452 2022-10-16 thomas 				csum_output(csum, zb.outbuf, avail);
263 20a7d452 2022-10-16 thomas 			*outlen += avail;
264 20a7d452 2022-10-16 thomas 		}
265 20a7d452 2022-10-16 thomas 	} while (zb.flags & GOT_DEFLATE_F_HAVE_MORE);
266 20a7d452 2022-10-16 thomas 
267 20a7d452 2022-10-16 thomas done:
268 20a7d452 2022-10-16 thomas 	got_deflate_end(&zb);
269 20a7d452 2022-10-16 thomas 	return err;
270 20a7d452 2022-10-16 thomas }
271 20a7d452 2022-10-16 thomas 
272 20a7d452 2022-10-16 thomas const struct got_error *
273 20a7d452 2022-10-16 thomas got_deflate_to_fd_mmap(off_t *outlen, uint8_t *map, size_t offset,
274 20a7d452 2022-10-16 thomas     size_t len, int outfd, struct got_deflate_checksum *csum)
275 20a7d452 2022-10-16 thomas {
276 20a7d452 2022-10-16 thomas 	const struct got_error *err;
277 20a7d452 2022-10-16 thomas 	size_t avail, consumed;
278 20a7d452 2022-10-16 thomas 	struct got_deflate_buf zb;
279 20a7d452 2022-10-16 thomas 
280 20a7d452 2022-10-16 thomas 	err = got_deflate_init(&zb, NULL, GOT_DEFLATE_BUFSIZE);
281 20a7d452 2022-10-16 thomas 	if (err)
282 20a7d452 2022-10-16 thomas 		goto done;
283 20a7d452 2022-10-16 thomas 
284 20a7d452 2022-10-16 thomas 	*outlen = 0;
285 20a7d452 2022-10-16 thomas 	do {
286 20a7d452 2022-10-16 thomas 		err = got_deflate_read_mmap(&zb, map, offset, len, &avail,
287 20a7d452 2022-10-16 thomas 		    &consumed);
288 20a7d452 2022-10-16 thomas 		if (err)
289 20a7d452 2022-10-16 thomas 			goto done;
290 20a7d452 2022-10-16 thomas 		offset += consumed;
291 20a7d452 2022-10-16 thomas 		len -= consumed;
292 20a7d452 2022-10-16 thomas 		if (avail > 0) {
293 3efd8e31 2022-10-23 thomas 			err = got_poll_write_full(outfd, zb.outbuf, avail);
294 3efd8e31 2022-10-23 thomas 			if (err)
295 20a7d452 2022-10-16 thomas 				goto done;
296 20a7d452 2022-10-16 thomas 			if (csum)
297 20a7d452 2022-10-16 thomas 				csum_output(csum, zb.outbuf, avail);
298 20a7d452 2022-10-16 thomas 			*outlen += avail;
299 20a7d452 2022-10-16 thomas 		}
300 20a7d452 2022-10-16 thomas 	} while (zb.flags & GOT_DEFLATE_F_HAVE_MORE);
301 20a7d452 2022-10-16 thomas 
302 20a7d452 2022-10-16 thomas done:
303 20a7d452 2022-10-16 thomas 	got_deflate_end(&zb);
304 20a7d452 2022-10-16 thomas 	return err;
305 2181e0c8 2019-03-19 stsp }
306 2181e0c8 2019-03-19 stsp 
307 2181e0c8 2019-03-19 stsp const struct got_error *
308 e8f02263 2022-01-23 thomas got_deflate_to_file(off_t *outlen, FILE *infile, off_t len,
309 e8f02263 2022-01-23 thomas     FILE *outfile, struct got_deflate_checksum *csum)
310 2181e0c8 2019-03-19 stsp {
311 2181e0c8 2019-03-19 stsp 	const struct got_error *err;
312 2181e0c8 2019-03-19 stsp 	size_t avail;
313 e8f02263 2022-01-23 thomas 	off_t consumed;
314 2181e0c8 2019-03-19 stsp 	struct got_deflate_buf zb;
315 2181e0c8 2019-03-19 stsp 
316 3b9e6fcf 2021-06-05 stsp 	err = got_deflate_init(&zb, NULL, GOT_DEFLATE_BUFSIZE);
317 2181e0c8 2019-03-19 stsp 	if (err)
318 2181e0c8 2019-03-19 stsp 		goto done;
319 2181e0c8 2019-03-19 stsp 
320 2181e0c8 2019-03-19 stsp 	*outlen = 0;
321 2181e0c8 2019-03-19 stsp 
322 2181e0c8 2019-03-19 stsp 	do {
323 e8f02263 2022-01-23 thomas 		err = got_deflate_read(&zb, infile, len, &avail, &consumed);
324 2181e0c8 2019-03-19 stsp 		if (err)
325 2181e0c8 2019-03-19 stsp 			goto done;
326 e8f02263 2022-01-23 thomas 		len -= consumed;
327 2181e0c8 2019-03-19 stsp 		if (avail > 0) {
328 2181e0c8 2019-03-19 stsp 			size_t n;
329 2181e0c8 2019-03-19 stsp 			n = fwrite(zb.outbuf, avail, 1, outfile);
330 2181e0c8 2019-03-19 stsp 			if (n != 1) {
331 2181e0c8 2019-03-19 stsp 				err = got_ferror(outfile, GOT_ERR_IO);
332 2181e0c8 2019-03-19 stsp 				goto done;
333 2181e0c8 2019-03-19 stsp 			}
334 3b9e6fcf 2021-06-05 stsp 			if (csum)
335 3b9e6fcf 2021-06-05 stsp 				csum_output(csum, zb.outbuf, avail);
336 2181e0c8 2019-03-19 stsp 			*outlen += avail;
337 2181e0c8 2019-03-19 stsp 		}
338 2181e0c8 2019-03-19 stsp 	} while (zb.flags & GOT_DEFLATE_F_HAVE_MORE);
339 2181e0c8 2019-03-19 stsp 
340 2181e0c8 2019-03-19 stsp done:
341 2181e0c8 2019-03-19 stsp 	got_deflate_end(&zb);
342 2181e0c8 2019-03-19 stsp 	return err;
343 2181e0c8 2019-03-19 stsp }
344 2b0ae357 2022-01-10 thomas 
345 2b0ae357 2022-01-10 thomas const struct got_error *
346 e8f02263 2022-01-23 thomas got_deflate_to_file_mmap(off_t *outlen, uint8_t *map, size_t offset,
347 2b0ae357 2022-01-10 thomas     size_t len, FILE *outfile, struct got_deflate_checksum *csum)
348 2b0ae357 2022-01-10 thomas {
349 2b0ae357 2022-01-10 thomas 	const struct got_error *err;
350 2b0ae357 2022-01-10 thomas 	size_t avail, consumed;
351 2b0ae357 2022-01-10 thomas 	struct got_deflate_buf zb;
352 2b0ae357 2022-01-10 thomas 
353 2b0ae357 2022-01-10 thomas 	err = got_deflate_init(&zb, NULL, GOT_DEFLATE_BUFSIZE);
354 2b0ae357 2022-01-10 thomas 	if (err)
355 2b0ae357 2022-01-10 thomas 		goto done;
356 2b0ae357 2022-01-10 thomas 
357 2b0ae357 2022-01-10 thomas 	*outlen = 0;
358 2b0ae357 2022-01-10 thomas 	do {
359 2b0ae357 2022-01-10 thomas 		err = got_deflate_read_mmap(&zb, map, offset, len, &avail,
360 2b0ae357 2022-01-10 thomas 		    &consumed);
361 2b0ae357 2022-01-10 thomas 		if (err)
362 2b0ae357 2022-01-10 thomas 			goto done;
363 2b0ae357 2022-01-10 thomas 		offset += consumed;
364 2b0ae357 2022-01-10 thomas 		len -= consumed;
365 2b0ae357 2022-01-10 thomas 		if (avail > 0) {
366 2b0ae357 2022-01-10 thomas 			size_t n;
367 2b0ae357 2022-01-10 thomas 			n = fwrite(zb.outbuf, avail, 1, outfile);
368 2b0ae357 2022-01-10 thomas 			if (n != 1) {
369 2b0ae357 2022-01-10 thomas 				err = got_ferror(outfile, GOT_ERR_IO);
370 2b0ae357 2022-01-10 thomas 				goto done;
371 2b0ae357 2022-01-10 thomas 			}
372 2b0ae357 2022-01-10 thomas 			if (csum)
373 2b0ae357 2022-01-10 thomas 				csum_output(csum, zb.outbuf, avail);
374 2b0ae357 2022-01-10 thomas 			*outlen += avail;
375 2b0ae357 2022-01-10 thomas 		}
376 2b0ae357 2022-01-10 thomas 	} while (zb.flags & GOT_DEFLATE_F_HAVE_MORE);
377 9249e7e3 2022-05-12 thomas 
378 9249e7e3 2022-05-12 thomas done:
379 9249e7e3 2022-05-12 thomas 	got_deflate_end(&zb);
380 9249e7e3 2022-05-12 thomas 	return err;
381 9249e7e3 2022-05-12 thomas }
382 9249e7e3 2022-05-12 thomas 
383 9249e7e3 2022-05-12 thomas const struct got_error *
384 9249e7e3 2022-05-12 thomas got_deflate_append_to_file_mmap(struct got_deflate_buf *zb, off_t *outlen,
385 9249e7e3 2022-05-12 thomas     uint8_t *map, size_t offset, size_t len, FILE *outfile,
386 9249e7e3 2022-05-12 thomas     struct got_deflate_checksum *csum)
387 9249e7e3 2022-05-12 thomas {
388 9249e7e3 2022-05-12 thomas 	const struct got_error *err;
389 9249e7e3 2022-05-12 thomas 	size_t avail, consumed;
390 9249e7e3 2022-05-12 thomas 
391 9249e7e3 2022-05-12 thomas 	do {
392 9249e7e3 2022-05-12 thomas 		err = deflate_read_mmap(zb, map, offset, len, &avail,
393 9249e7e3 2022-05-12 thomas 		    &consumed, 0);
394 9249e7e3 2022-05-12 thomas 		if (err)
395 9249e7e3 2022-05-12 thomas 			break;
396 9249e7e3 2022-05-12 thomas 		offset += consumed;
397 9249e7e3 2022-05-12 thomas 		len -= consumed;
398 9249e7e3 2022-05-12 thomas 		if (avail > 0) {
399 9249e7e3 2022-05-12 thomas 			size_t n;
400 9249e7e3 2022-05-12 thomas 			n = fwrite(zb->outbuf, avail, 1, outfile);
401 9249e7e3 2022-05-12 thomas 			if (n != 1) {
402 9249e7e3 2022-05-12 thomas 				err = got_ferror(outfile, GOT_ERR_IO);
403 9249e7e3 2022-05-12 thomas 				break;
404 9249e7e3 2022-05-12 thomas 			}
405 9249e7e3 2022-05-12 thomas 			if (csum)
406 9249e7e3 2022-05-12 thomas 				csum_output(csum, zb->outbuf, avail);
407 9249e7e3 2022-05-12 thomas 			if (outlen)
408 9249e7e3 2022-05-12 thomas 				*outlen += avail;
409 9249e7e3 2022-05-12 thomas 		}
410 9249e7e3 2022-05-12 thomas 	} while ((zb->flags & GOT_DEFLATE_F_HAVE_MORE) && len > 0);
411 2b0ae357 2022-01-10 thomas 
412 9249e7e3 2022-05-12 thomas 	return err;
413 9249e7e3 2022-05-12 thomas }
414 9249e7e3 2022-05-12 thomas 
415 9249e7e3 2022-05-12 thomas const struct got_error *
416 9249e7e3 2022-05-12 thomas got_deflate_to_mem_mmap(uint8_t **outbuf, size_t *outlen,
417 9249e7e3 2022-05-12 thomas     size_t *consumed_total, struct got_deflate_checksum *csum, uint8_t *map,
418 9249e7e3 2022-05-12 thomas     size_t offset, size_t len)
419 9249e7e3 2022-05-12 thomas {
420 9249e7e3 2022-05-12 thomas 	const struct got_error *err;
421 9249e7e3 2022-05-12 thomas 	size_t avail, consumed;
422 9249e7e3 2022-05-12 thomas 	struct got_deflate_buf zb;
423 9249e7e3 2022-05-12 thomas 	void *newbuf;
424 9249e7e3 2022-05-12 thomas 	size_t nbuf = 1;
425 9249e7e3 2022-05-12 thomas 
426 9249e7e3 2022-05-12 thomas 	if (outbuf) {
427 9249e7e3 2022-05-12 thomas 		*outbuf = malloc(GOT_DEFLATE_BUFSIZE);
428 9249e7e3 2022-05-12 thomas 		if (*outbuf == NULL)
429 9249e7e3 2022-05-12 thomas 			return got_error_from_errno("malloc");
430 9249e7e3 2022-05-12 thomas 		err = got_deflate_init(&zb, *outbuf, GOT_DEFLATE_BUFSIZE);
431 9249e7e3 2022-05-12 thomas 		if (err) {
432 9249e7e3 2022-05-12 thomas 			free(*outbuf);
433 9249e7e3 2022-05-12 thomas 			*outbuf = NULL;
434 9249e7e3 2022-05-12 thomas 			return err;
435 9249e7e3 2022-05-12 thomas 		}
436 9249e7e3 2022-05-12 thomas 	} else {
437 9249e7e3 2022-05-12 thomas 		err = got_deflate_init(&zb, NULL, GOT_DEFLATE_BUFSIZE);
438 9249e7e3 2022-05-12 thomas 		if (err)
439 9249e7e3 2022-05-12 thomas 			return err;
440 9249e7e3 2022-05-12 thomas 	}
441 9249e7e3 2022-05-12 thomas 
442 9249e7e3 2022-05-12 thomas 	*outlen = 0;
443 9249e7e3 2022-05-12 thomas 	if (consumed_total)
444 9249e7e3 2022-05-12 thomas 		*consumed_total = 0;
445 9249e7e3 2022-05-12 thomas 	do {
446 9249e7e3 2022-05-12 thomas 		err = got_deflate_read_mmap(&zb, map, offset, len, &avail,
447 9249e7e3 2022-05-12 thomas 		    &consumed);
448 9249e7e3 2022-05-12 thomas 		if (err)
449 9249e7e3 2022-05-12 thomas 			goto done;
450 9249e7e3 2022-05-12 thomas 		offset += consumed;
451 9249e7e3 2022-05-12 thomas 		if (consumed_total)
452 9249e7e3 2022-05-12 thomas 			*consumed_total += consumed;
453 9249e7e3 2022-05-12 thomas 		len -= consumed;
454 9249e7e3 2022-05-12 thomas 		if (avail > 0 && csum)
455 9249e7e3 2022-05-12 thomas 			csum_output(csum, zb.outbuf, avail);
456 9249e7e3 2022-05-12 thomas 		*outlen += avail;
457 9249e7e3 2022-05-12 thomas 		if ((zb.flags & GOT_DEFLATE_F_HAVE_MORE) && outbuf != NULL) {
458 9249e7e3 2022-05-12 thomas 			newbuf = reallocarray(*outbuf, ++nbuf,
459 9249e7e3 2022-05-12 thomas 			    GOT_DEFLATE_BUFSIZE);
460 9249e7e3 2022-05-12 thomas 			if (newbuf == NULL) {
461 9249e7e3 2022-05-12 thomas 				err = got_error_from_errno("reallocarray");
462 9249e7e3 2022-05-12 thomas 				free(*outbuf);
463 9249e7e3 2022-05-12 thomas 				*outbuf = NULL;
464 9249e7e3 2022-05-12 thomas 				*outlen = 0;
465 9249e7e3 2022-05-12 thomas 				goto done;
466 9249e7e3 2022-05-12 thomas 			}
467 9249e7e3 2022-05-12 thomas 			*outbuf = newbuf;
468 9249e7e3 2022-05-12 thomas 			zb.outbuf = newbuf + *outlen;
469 9249e7e3 2022-05-12 thomas 			zb.outlen = (nbuf * GOT_DEFLATE_BUFSIZE) - *outlen;
470 9249e7e3 2022-05-12 thomas 		}
471 9249e7e3 2022-05-12 thomas 	} while (zb.flags & GOT_DEFLATE_F_HAVE_MORE);
472 2b0ae357 2022-01-10 thomas done:
473 2b0ae357 2022-01-10 thomas 	got_deflate_end(&zb);
474 2b0ae357 2022-01-10 thomas 	return err;
475 2b0ae357 2022-01-10 thomas }