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 69c6accf 2023-02-04 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 13b2bc37 2022-10-23 stsp #include "got_lib_poll.h"
 34 2181e0c8 2019-03-19 stsp 
 35 2181e0c8 2019-03-19 stsp #ifndef MIN
 36 2181e0c8 2019-03-19 stsp #define	MIN(_a,_b) ((_a) < (_b) ? (_a) : (_b))
 37 2181e0c8 2019-03-19 stsp #endif
 38 2181e0c8 2019-03-19 stsp 
 39 2181e0c8 2019-03-19 stsp const struct got_error *
 40 3b9e6fcf 2021-06-05 stsp got_deflate_init(struct got_deflate_buf *zb, uint8_t *outbuf, size_t bufsize)
 41 2181e0c8 2019-03-19 stsp {
 42 2181e0c8 2019-03-19 stsp 	const struct got_error *err = NULL;
 43 2181e0c8 2019-03-19 stsp 	int zerr;
 44 2181e0c8 2019-03-19 stsp 
 45 0fc5e229 2022-11-08 stsp 	memset(zb, 0, sizeof(*zb));
 46 2181e0c8 2019-03-19 stsp 
 47 2181e0c8 2019-03-19 stsp 	zb->z.zalloc = Z_NULL;
 48 2181e0c8 2019-03-19 stsp 	zb->z.zfree = Z_NULL;
 49 2181e0c8 2019-03-19 stsp 	zerr = deflateInit(&zb->z, Z_DEFAULT_COMPRESSION);
 50 2181e0c8 2019-03-19 stsp 	if (zerr != Z_OK) {
 51 2181e0c8 2019-03-19 stsp 		if  (zerr == Z_ERRNO)
 52 638f9024 2019-05-13 stsp 			return got_error_from_errno("deflateInit");
 53 2181e0c8 2019-03-19 stsp 		if  (zerr == Z_MEM_ERROR) {
 54 2181e0c8 2019-03-19 stsp 			errno = ENOMEM;
 55 638f9024 2019-05-13 stsp 			return got_error_from_errno("deflateInit");
 56 2181e0c8 2019-03-19 stsp 		}
 57 2181e0c8 2019-03-19 stsp 		return got_error(GOT_ERR_COMPRESSION);
 58 2181e0c8 2019-03-19 stsp 	}
 59 2181e0c8 2019-03-19 stsp 
 60 2181e0c8 2019-03-19 stsp 	zb->inlen = zb->outlen = bufsize;
 61 2181e0c8 2019-03-19 stsp 
 62 2181e0c8 2019-03-19 stsp 	zb->inbuf = calloc(1, zb->inlen);
 63 2181e0c8 2019-03-19 stsp 	if (zb->inbuf == NULL) {
 64 638f9024 2019-05-13 stsp 		err = got_error_from_errno("calloc");
 65 2181e0c8 2019-03-19 stsp 		goto done;
 66 2181e0c8 2019-03-19 stsp 	}
 67 2181e0c8 2019-03-19 stsp 
 68 2181e0c8 2019-03-19 stsp 	zb->flags = 0;
 69 2181e0c8 2019-03-19 stsp 	if (outbuf == NULL) {
 70 2181e0c8 2019-03-19 stsp 		zb->outbuf = calloc(1, zb->outlen);
 71 2181e0c8 2019-03-19 stsp 		if (zb->outbuf == NULL) {
 72 638f9024 2019-05-13 stsp 			err = got_error_from_errno("calloc");
 73 2181e0c8 2019-03-19 stsp 			goto done;
 74 2181e0c8 2019-03-19 stsp 		}
 75 2181e0c8 2019-03-19 stsp 		zb->flags |= GOT_DEFLATE_F_OWN_OUTBUF;
 76 2181e0c8 2019-03-19 stsp 	} else
 77 2181e0c8 2019-03-19 stsp 		zb->outbuf = outbuf;
 78 2181e0c8 2019-03-19 stsp done:
 79 2181e0c8 2019-03-19 stsp 	if (err)
 80 2181e0c8 2019-03-19 stsp 		got_deflate_end(zb);
 81 2181e0c8 2019-03-19 stsp 	return err;
 82 2181e0c8 2019-03-19 stsp }
 83 2181e0c8 2019-03-19 stsp 
 84 91b40e30 2021-05-21 stsp static void
 85 31e61ec1 2021-09-28 naddy csum_output(struct got_deflate_checksum *csum, const uint8_t *buf, size_t len)
 86 91b40e30 2021-05-21 stsp {
 87 91b40e30 2021-05-21 stsp 	if (csum->output_crc)
 88 91b40e30 2021-05-21 stsp 		*csum->output_crc = crc32(*csum->output_crc, buf, len);
 89 91b40e30 2021-05-21 stsp 
 90 3093e2d7 2023-02-04 op 	if (csum->output_hash)
 91 3093e2d7 2023-02-04 op 		SHA1Update(csum->output_hash, buf, len);
 92 91b40e30 2021-05-21 stsp }
 93 91b40e30 2021-05-21 stsp 
 94 2181e0c8 2019-03-19 stsp const struct got_error *
 95 72840534 2022-01-19 stsp got_deflate_read(struct got_deflate_buf *zb, FILE *f, off_t len,
 96 72840534 2022-01-19 stsp     size_t *outlenp, off_t *consumed)
 97 2181e0c8 2019-03-19 stsp {
 98 2181e0c8 2019-03-19 stsp 	size_t last_total_out = zb->z.total_out;
 99 2181e0c8 2019-03-19 stsp 	z_stream *z = &zb->z;
100 2181e0c8 2019-03-19 stsp 	int ret = Z_ERRNO;
101 2181e0c8 2019-03-19 stsp 
102 2181e0c8 2019-03-19 stsp 	z->next_out = zb->outbuf;
103 2181e0c8 2019-03-19 stsp 	z->avail_out = zb->outlen;
104 2181e0c8 2019-03-19 stsp 
105 2181e0c8 2019-03-19 stsp 	*outlenp = 0;
106 72840534 2022-01-19 stsp 	*consumed = 0;
107 2181e0c8 2019-03-19 stsp 	do {
108 72840534 2022-01-19 stsp 		size_t last_total_in = z->total_in;
109 2181e0c8 2019-03-19 stsp 		if (z->avail_in == 0) {
110 72840534 2022-01-19 stsp 			size_t n = 0;
111 72840534 2022-01-19 stsp 			if (*consumed < len) {
112 72840534 2022-01-19 stsp 				n = fread(zb->inbuf, 1,
113 72840534 2022-01-19 stsp 				    MIN(zb->inlen, len - *consumed), f);
114 72840534 2022-01-19 stsp 			}
115 2181e0c8 2019-03-19 stsp 			if (n == 0) {
116 2181e0c8 2019-03-19 stsp 				if (ferror(f))
117 2181e0c8 2019-03-19 stsp 					return got_ferror(f, GOT_ERR_IO);
118 2181e0c8 2019-03-19 stsp 				/* EOF */
119 4e4a7005 2019-04-13 stsp 				ret = deflate(z, Z_FINISH);
120 2181e0c8 2019-03-19 stsp 				break;
121 2181e0c8 2019-03-19 stsp 			}
122 2181e0c8 2019-03-19 stsp 			z->next_in = zb->inbuf;
123 2181e0c8 2019-03-19 stsp 			z->avail_in = n;
124 2181e0c8 2019-03-19 stsp 		}
125 2181e0c8 2019-03-19 stsp 		ret = deflate(z, Z_NO_FLUSH);
126 72840534 2022-01-19 stsp 		*consumed += z->total_in - last_total_in;
127 2181e0c8 2019-03-19 stsp 	} while (ret == Z_OK && z->avail_out > 0);
128 2181e0c8 2019-03-19 stsp 
129 2181e0c8 2019-03-19 stsp 	if (ret == Z_OK) {
130 2181e0c8 2019-03-19 stsp 		zb->flags |= GOT_DEFLATE_F_HAVE_MORE;
131 2181e0c8 2019-03-19 stsp 	} else {
132 2181e0c8 2019-03-19 stsp 		if (ret != Z_STREAM_END)
133 2181e0c8 2019-03-19 stsp 			return got_error(GOT_ERR_COMPRESSION);
134 2181e0c8 2019-03-19 stsp 		zb->flags &= ~GOT_DEFLATE_F_HAVE_MORE;
135 2181e0c8 2019-03-19 stsp 	}
136 2181e0c8 2019-03-19 stsp 
137 2181e0c8 2019-03-19 stsp 	*outlenp = z->total_out - last_total_out;
138 2181e0c8 2019-03-19 stsp 	return NULL;
139 2181e0c8 2019-03-19 stsp }
140 2181e0c8 2019-03-19 stsp 
141 2d9e6abf 2022-05-04 stsp static const struct got_error *
142 2d9e6abf 2022-05-04 stsp deflate_read_mmap(struct got_deflate_buf *zb, uint8_t *map, size_t offset,
143 2d9e6abf 2022-05-04 stsp     size_t len, size_t *outlenp, size_t *consumed, int flush_on_eof)
144 64a8571e 2022-01-07 stsp {
145 64a8571e 2022-01-07 stsp 	z_stream *z = &zb->z;
146 64a8571e 2022-01-07 stsp 	size_t last_total_out = z->total_out;
147 64a8571e 2022-01-07 stsp 	int ret = Z_ERRNO;
148 64a8571e 2022-01-07 stsp 
149 64a8571e 2022-01-07 stsp 	z->next_out = zb->outbuf;
150 64a8571e 2022-01-07 stsp 	z->avail_out = zb->outlen;
151 64a8571e 2022-01-07 stsp 
152 64a8571e 2022-01-07 stsp 	*outlenp = 0;
153 64a8571e 2022-01-07 stsp 	*consumed = 0;
154 64a8571e 2022-01-07 stsp 	do {
155 64a8571e 2022-01-07 stsp 		size_t last_total_in = z->total_in;
156 64a8571e 2022-01-07 stsp 		if (z->avail_in == 0) {
157 64a8571e 2022-01-07 stsp 			z->next_in = map + offset + *consumed;
158 a9bd296d 2022-02-08 stsp 			if (len - *consumed > UINT_MAX)
159 a9bd296d 2022-02-08 stsp 				z->avail_in = UINT_MAX;
160 a9bd296d 2022-02-08 stsp 			else
161 a9bd296d 2022-02-08 stsp 				z->avail_in = len - *consumed;
162 64a8571e 2022-01-07 stsp 			if (z->avail_in == 0) {
163 64a8571e 2022-01-07 stsp 				/* EOF */
164 2d9e6abf 2022-05-04 stsp 				if (flush_on_eof)
165 2d9e6abf 2022-05-04 stsp 					ret = deflate(z, Z_FINISH);
166 64a8571e 2022-01-07 stsp 				break;
167 64a8571e 2022-01-07 stsp 			}
168 64a8571e 2022-01-07 stsp 		}
169 64a8571e 2022-01-07 stsp 		ret = deflate(z, Z_NO_FLUSH);
170 64a8571e 2022-01-07 stsp 		*consumed += z->total_in - last_total_in;
171 64a8571e 2022-01-07 stsp 	} while (ret == Z_OK && z->avail_out > 0);
172 64a8571e 2022-01-07 stsp 
173 64a8571e 2022-01-07 stsp 	if (ret == Z_OK) {
174 64a8571e 2022-01-07 stsp 		zb->flags |= GOT_DEFLATE_F_HAVE_MORE;
175 64a8571e 2022-01-07 stsp 	} else {
176 64a8571e 2022-01-07 stsp 		if (ret != Z_STREAM_END)
177 64a8571e 2022-01-07 stsp 			return got_error(GOT_ERR_COMPRESSION);
178 64a8571e 2022-01-07 stsp 		zb->flags &= ~GOT_DEFLATE_F_HAVE_MORE;
179 64a8571e 2022-01-07 stsp 	}
180 64a8571e 2022-01-07 stsp 
181 64a8571e 2022-01-07 stsp 	*outlenp = z->total_out - last_total_out;
182 2d9e6abf 2022-05-04 stsp 	return NULL;
183 2d9e6abf 2022-05-04 stsp }
184 2d9e6abf 2022-05-04 stsp 
185 2d9e6abf 2022-05-04 stsp const struct got_error *
186 2d9e6abf 2022-05-04 stsp got_deflate_read_mmap(struct got_deflate_buf *zb, uint8_t *map, size_t offset,
187 2d9e6abf 2022-05-04 stsp     size_t len, size_t *outlenp, size_t *consumed)
188 2d9e6abf 2022-05-04 stsp {
189 2d9e6abf 2022-05-04 stsp 	return deflate_read_mmap(zb, map, offset, len, outlenp, consumed, 1);
190 2d9e6abf 2022-05-04 stsp }
191 2d9e6abf 2022-05-04 stsp 
192 2d9e6abf 2022-05-04 stsp const struct got_error *
193 2d9e6abf 2022-05-04 stsp got_deflate_flush(struct got_deflate_buf *zb, FILE *outfile,
194 2d9e6abf 2022-05-04 stsp     struct got_deflate_checksum *csum, off_t *outlenp)
195 2d9e6abf 2022-05-04 stsp {
196 2d9e6abf 2022-05-04 stsp 	int ret;
197 2d9e6abf 2022-05-04 stsp 	size_t n;
198 2d9e6abf 2022-05-04 stsp 	z_stream *z = &zb->z;
199 2d9e6abf 2022-05-04 stsp 
200 2d9e6abf 2022-05-04 stsp 	if (z->avail_in != 0)
201 2d9e6abf 2022-05-04 stsp 		return got_error_msg(GOT_ERR_COMPRESSION,
202 2d9e6abf 2022-05-04 stsp 		    "cannot flush zb with pending input data");
203 2d9e6abf 2022-05-04 stsp 
204 2d9e6abf 2022-05-04 stsp 	do {
205 2d9e6abf 2022-05-04 stsp 		size_t avail, last_total_out = zb->z.total_out;
206 2d9e6abf 2022-05-04 stsp 
207 2d9e6abf 2022-05-04 stsp 		z->next_out = zb->outbuf;
208 2d9e6abf 2022-05-04 stsp 		z->avail_out = zb->outlen;
209 2d9e6abf 2022-05-04 stsp 
210 2d9e6abf 2022-05-04 stsp 		ret = deflate(z, Z_FINISH);
211 2d9e6abf 2022-05-04 stsp 		if (ret != Z_STREAM_END && ret != Z_OK)
212 2d9e6abf 2022-05-04 stsp 			return got_error(GOT_ERR_COMPRESSION);
213 2d9e6abf 2022-05-04 stsp 
214 2d9e6abf 2022-05-04 stsp 		avail = z->total_out - last_total_out;
215 2d9e6abf 2022-05-04 stsp 		if (avail > 0) {
216 2d9e6abf 2022-05-04 stsp 			n = fwrite(zb->outbuf, avail, 1, outfile);
217 2d9e6abf 2022-05-04 stsp 			if (n != 1)
218 2d9e6abf 2022-05-04 stsp 				return got_ferror(outfile, GOT_ERR_IO);
219 2d9e6abf 2022-05-04 stsp 			if (csum)
220 2d9e6abf 2022-05-04 stsp 				csum_output(csum, zb->outbuf, avail);
221 2d9e6abf 2022-05-04 stsp 			if (outlenp)
222 2d9e6abf 2022-05-04 stsp 				*outlenp += avail;
223 2d9e6abf 2022-05-04 stsp 		}
224 2d9e6abf 2022-05-04 stsp 	} while (ret != Z_STREAM_END);
225 2d9e6abf 2022-05-04 stsp 
226 2d9e6abf 2022-05-04 stsp 	zb->flags &= ~GOT_DEFLATE_F_HAVE_MORE;
227 64a8571e 2022-01-07 stsp 	return NULL;
228 64a8571e 2022-01-07 stsp }
229 64a8571e 2022-01-07 stsp 
230 2181e0c8 2019-03-19 stsp void
231 2181e0c8 2019-03-19 stsp got_deflate_end(struct got_deflate_buf *zb)
232 2181e0c8 2019-03-19 stsp {
233 2181e0c8 2019-03-19 stsp 	free(zb->inbuf);
234 2181e0c8 2019-03-19 stsp 	if (zb->flags & GOT_DEFLATE_F_OWN_OUTBUF)
235 2181e0c8 2019-03-19 stsp 		free(zb->outbuf);
236 2181e0c8 2019-03-19 stsp 	deflateEnd(&zb->z);
237 894e4711 2022-10-15 stsp }
238 894e4711 2022-10-15 stsp 
239 894e4711 2022-10-15 stsp const struct got_error *
240 894e4711 2022-10-15 stsp got_deflate_to_fd(off_t *outlen, FILE *infile, off_t len, int outfd,
241 894e4711 2022-10-15 stsp     struct got_deflate_checksum *csum)
242 894e4711 2022-10-15 stsp {
243 894e4711 2022-10-15 stsp 	const struct got_error *err;
244 894e4711 2022-10-15 stsp 	size_t avail;
245 894e4711 2022-10-15 stsp 	off_t consumed;
246 894e4711 2022-10-15 stsp 	struct got_deflate_buf zb;
247 894e4711 2022-10-15 stsp 
248 894e4711 2022-10-15 stsp 	err = got_deflate_init(&zb, NULL, GOT_DEFLATE_BUFSIZE);
249 894e4711 2022-10-15 stsp 	if (err)
250 894e4711 2022-10-15 stsp 		goto done;
251 894e4711 2022-10-15 stsp 
252 894e4711 2022-10-15 stsp 	*outlen = 0;
253 894e4711 2022-10-15 stsp 
254 894e4711 2022-10-15 stsp 	do {
255 894e4711 2022-10-15 stsp 		err = got_deflate_read(&zb, infile, len, &avail, &consumed);
256 894e4711 2022-10-15 stsp 		if (err)
257 894e4711 2022-10-15 stsp 			goto done;
258 894e4711 2022-10-15 stsp 		len -= consumed;
259 894e4711 2022-10-15 stsp 		if (avail > 0) {
260 13b2bc37 2022-10-23 stsp 			err = got_poll_write_full(outfd, zb.outbuf, avail);
261 13b2bc37 2022-10-23 stsp 			if (err)
262 894e4711 2022-10-15 stsp 				goto done;
263 894e4711 2022-10-15 stsp 			if (csum)
264 894e4711 2022-10-15 stsp 				csum_output(csum, zb.outbuf, avail);
265 894e4711 2022-10-15 stsp 			*outlen += avail;
266 894e4711 2022-10-15 stsp 		}
267 894e4711 2022-10-15 stsp 	} while (zb.flags & GOT_DEFLATE_F_HAVE_MORE);
268 894e4711 2022-10-15 stsp 
269 894e4711 2022-10-15 stsp done:
270 894e4711 2022-10-15 stsp 	got_deflate_end(&zb);
271 894e4711 2022-10-15 stsp 	return err;
272 894e4711 2022-10-15 stsp }
273 894e4711 2022-10-15 stsp 
274 894e4711 2022-10-15 stsp const struct got_error *
275 894e4711 2022-10-15 stsp got_deflate_to_fd_mmap(off_t *outlen, uint8_t *map, size_t offset,
276 894e4711 2022-10-15 stsp     size_t len, int outfd, struct got_deflate_checksum *csum)
277 894e4711 2022-10-15 stsp {
278 894e4711 2022-10-15 stsp 	const struct got_error *err;
279 894e4711 2022-10-15 stsp 	size_t avail, consumed;
280 894e4711 2022-10-15 stsp 	struct got_deflate_buf zb;
281 894e4711 2022-10-15 stsp 
282 894e4711 2022-10-15 stsp 	err = got_deflate_init(&zb, NULL, GOT_DEFLATE_BUFSIZE);
283 894e4711 2022-10-15 stsp 	if (err)
284 894e4711 2022-10-15 stsp 		goto done;
285 894e4711 2022-10-15 stsp 
286 894e4711 2022-10-15 stsp 	*outlen = 0;
287 894e4711 2022-10-15 stsp 	do {
288 894e4711 2022-10-15 stsp 		err = got_deflate_read_mmap(&zb, map, offset, len, &avail,
289 894e4711 2022-10-15 stsp 		    &consumed);
290 894e4711 2022-10-15 stsp 		if (err)
291 894e4711 2022-10-15 stsp 			goto done;
292 894e4711 2022-10-15 stsp 		offset += consumed;
293 894e4711 2022-10-15 stsp 		len -= consumed;
294 894e4711 2022-10-15 stsp 		if (avail > 0) {
295 13b2bc37 2022-10-23 stsp 			err = got_poll_write_full(outfd, zb.outbuf, avail);
296 13b2bc37 2022-10-23 stsp 			if (err)
297 894e4711 2022-10-15 stsp 				goto done;
298 894e4711 2022-10-15 stsp 			if (csum)
299 894e4711 2022-10-15 stsp 				csum_output(csum, zb.outbuf, avail);
300 894e4711 2022-10-15 stsp 			*outlen += avail;
301 894e4711 2022-10-15 stsp 		}
302 894e4711 2022-10-15 stsp 	} while (zb.flags & GOT_DEFLATE_F_HAVE_MORE);
303 894e4711 2022-10-15 stsp 
304 894e4711 2022-10-15 stsp done:
305 894e4711 2022-10-15 stsp 	got_deflate_end(&zb);
306 894e4711 2022-10-15 stsp 	return err;
307 2181e0c8 2019-03-19 stsp }
308 2181e0c8 2019-03-19 stsp 
309 2181e0c8 2019-03-19 stsp const struct got_error *
310 72840534 2022-01-19 stsp got_deflate_to_file(off_t *outlen, FILE *infile, off_t len,
311 72840534 2022-01-19 stsp     FILE *outfile, struct got_deflate_checksum *csum)
312 2181e0c8 2019-03-19 stsp {
313 2181e0c8 2019-03-19 stsp 	const struct got_error *err;
314 2181e0c8 2019-03-19 stsp 	size_t avail;
315 72840534 2022-01-19 stsp 	off_t consumed;
316 2181e0c8 2019-03-19 stsp 	struct got_deflate_buf zb;
317 2181e0c8 2019-03-19 stsp 
318 3b9e6fcf 2021-06-05 stsp 	err = got_deflate_init(&zb, NULL, GOT_DEFLATE_BUFSIZE);
319 2181e0c8 2019-03-19 stsp 	if (err)
320 2181e0c8 2019-03-19 stsp 		goto done;
321 2181e0c8 2019-03-19 stsp 
322 2181e0c8 2019-03-19 stsp 	*outlen = 0;
323 2181e0c8 2019-03-19 stsp 
324 2181e0c8 2019-03-19 stsp 	do {
325 72840534 2022-01-19 stsp 		err = got_deflate_read(&zb, infile, len, &avail, &consumed);
326 2181e0c8 2019-03-19 stsp 		if (err)
327 2181e0c8 2019-03-19 stsp 			goto done;
328 72840534 2022-01-19 stsp 		len -= consumed;
329 2181e0c8 2019-03-19 stsp 		if (avail > 0) {
330 2181e0c8 2019-03-19 stsp 			size_t n;
331 2181e0c8 2019-03-19 stsp 			n = fwrite(zb.outbuf, avail, 1, outfile);
332 2181e0c8 2019-03-19 stsp 			if (n != 1) {
333 2181e0c8 2019-03-19 stsp 				err = got_ferror(outfile, GOT_ERR_IO);
334 2181e0c8 2019-03-19 stsp 				goto done;
335 2181e0c8 2019-03-19 stsp 			}
336 3b9e6fcf 2021-06-05 stsp 			if (csum)
337 3b9e6fcf 2021-06-05 stsp 				csum_output(csum, zb.outbuf, avail);
338 2181e0c8 2019-03-19 stsp 			*outlen += avail;
339 2181e0c8 2019-03-19 stsp 		}
340 2181e0c8 2019-03-19 stsp 	} while (zb.flags & GOT_DEFLATE_F_HAVE_MORE);
341 2181e0c8 2019-03-19 stsp 
342 2181e0c8 2019-03-19 stsp done:
343 2181e0c8 2019-03-19 stsp 	got_deflate_end(&zb);
344 2181e0c8 2019-03-19 stsp 	return err;
345 2181e0c8 2019-03-19 stsp }
346 64a8571e 2022-01-07 stsp 
347 64a8571e 2022-01-07 stsp const struct got_error *
348 72840534 2022-01-19 stsp got_deflate_to_file_mmap(off_t *outlen, uint8_t *map, size_t offset,
349 64a8571e 2022-01-07 stsp     size_t len, FILE *outfile, struct got_deflate_checksum *csum)
350 64a8571e 2022-01-07 stsp {
351 64a8571e 2022-01-07 stsp 	const struct got_error *err;
352 64a8571e 2022-01-07 stsp 	size_t avail, consumed;
353 64a8571e 2022-01-07 stsp 	struct got_deflate_buf zb;
354 64a8571e 2022-01-07 stsp 
355 64a8571e 2022-01-07 stsp 	err = got_deflate_init(&zb, NULL, GOT_DEFLATE_BUFSIZE);
356 64a8571e 2022-01-07 stsp 	if (err)
357 64a8571e 2022-01-07 stsp 		goto done;
358 64a8571e 2022-01-07 stsp 
359 64a8571e 2022-01-07 stsp 	*outlen = 0;
360 64a8571e 2022-01-07 stsp 	do {
361 64a8571e 2022-01-07 stsp 		err = got_deflate_read_mmap(&zb, map, offset, len, &avail,
362 64a8571e 2022-01-07 stsp 		    &consumed);
363 64a8571e 2022-01-07 stsp 		if (err)
364 64a8571e 2022-01-07 stsp 			goto done;
365 64a8571e 2022-01-07 stsp 		offset += consumed;
366 64a8571e 2022-01-07 stsp 		len -= consumed;
367 64a8571e 2022-01-07 stsp 		if (avail > 0) {
368 64a8571e 2022-01-07 stsp 			size_t n;
369 64a8571e 2022-01-07 stsp 			n = fwrite(zb.outbuf, avail, 1, outfile);
370 64a8571e 2022-01-07 stsp 			if (n != 1) {
371 64a8571e 2022-01-07 stsp 				err = got_ferror(outfile, GOT_ERR_IO);
372 64a8571e 2022-01-07 stsp 				goto done;
373 64a8571e 2022-01-07 stsp 			}
374 64a8571e 2022-01-07 stsp 			if (csum)
375 64a8571e 2022-01-07 stsp 				csum_output(csum, zb.outbuf, avail);
376 64a8571e 2022-01-07 stsp 			*outlen += avail;
377 64a8571e 2022-01-07 stsp 		}
378 64a8571e 2022-01-07 stsp 	} while (zb.flags & GOT_DEFLATE_F_HAVE_MORE);
379 2d9e6abf 2022-05-04 stsp 
380 2d9e6abf 2022-05-04 stsp done:
381 2d9e6abf 2022-05-04 stsp 	got_deflate_end(&zb);
382 2d9e6abf 2022-05-04 stsp 	return err;
383 2d9e6abf 2022-05-04 stsp }
384 2d9e6abf 2022-05-04 stsp 
385 2d9e6abf 2022-05-04 stsp const struct got_error *
386 2d9e6abf 2022-05-04 stsp got_deflate_append_to_file_mmap(struct got_deflate_buf *zb, off_t *outlen,
387 2d9e6abf 2022-05-04 stsp     uint8_t *map, size_t offset, size_t len, FILE *outfile,
388 2d9e6abf 2022-05-04 stsp     struct got_deflate_checksum *csum)
389 2d9e6abf 2022-05-04 stsp {
390 2d9e6abf 2022-05-04 stsp 	const struct got_error *err;
391 2d9e6abf 2022-05-04 stsp 	size_t avail, consumed;
392 2d9e6abf 2022-05-04 stsp 
393 2d9e6abf 2022-05-04 stsp 	do {
394 2d9e6abf 2022-05-04 stsp 		err = deflate_read_mmap(zb, map, offset, len, &avail,
395 2d9e6abf 2022-05-04 stsp 		    &consumed, 0);
396 2d9e6abf 2022-05-04 stsp 		if (err)
397 2d9e6abf 2022-05-04 stsp 			break;
398 2d9e6abf 2022-05-04 stsp 		offset += consumed;
399 2d9e6abf 2022-05-04 stsp 		len -= consumed;
400 2d9e6abf 2022-05-04 stsp 		if (avail > 0) {
401 2d9e6abf 2022-05-04 stsp 			size_t n;
402 2d9e6abf 2022-05-04 stsp 			n = fwrite(zb->outbuf, avail, 1, outfile);
403 2d9e6abf 2022-05-04 stsp 			if (n != 1) {
404 2d9e6abf 2022-05-04 stsp 				err = got_ferror(outfile, GOT_ERR_IO);
405 2d9e6abf 2022-05-04 stsp 				break;
406 2d9e6abf 2022-05-04 stsp 			}
407 2d9e6abf 2022-05-04 stsp 			if (csum)
408 2d9e6abf 2022-05-04 stsp 				csum_output(csum, zb->outbuf, avail);
409 2d9e6abf 2022-05-04 stsp 			if (outlen)
410 2d9e6abf 2022-05-04 stsp 				*outlen += avail;
411 2d9e6abf 2022-05-04 stsp 		}
412 2d9e6abf 2022-05-04 stsp 	} while ((zb->flags & GOT_DEFLATE_F_HAVE_MORE) && len > 0);
413 64a8571e 2022-01-07 stsp 
414 2d9e6abf 2022-05-04 stsp 	return err;
415 2d9e6abf 2022-05-04 stsp }
416 2d9e6abf 2022-05-04 stsp 
417 2d9e6abf 2022-05-04 stsp const struct got_error *
418 2d9e6abf 2022-05-04 stsp got_deflate_to_mem_mmap(uint8_t **outbuf, size_t *outlen,
419 2d9e6abf 2022-05-04 stsp     size_t *consumed_total, struct got_deflate_checksum *csum, uint8_t *map,
420 2d9e6abf 2022-05-04 stsp     size_t offset, size_t len)
421 2d9e6abf 2022-05-04 stsp {
422 2d9e6abf 2022-05-04 stsp 	const struct got_error *err;
423 2d9e6abf 2022-05-04 stsp 	size_t avail, consumed;
424 2d9e6abf 2022-05-04 stsp 	struct got_deflate_buf zb;
425 2d9e6abf 2022-05-04 stsp 	void *newbuf;
426 2d9e6abf 2022-05-04 stsp 	size_t nbuf = 1;
427 2d9e6abf 2022-05-04 stsp 
428 2d9e6abf 2022-05-04 stsp 	if (outbuf) {
429 2d9e6abf 2022-05-04 stsp 		*outbuf = malloc(GOT_DEFLATE_BUFSIZE);
430 2d9e6abf 2022-05-04 stsp 		if (*outbuf == NULL)
431 2d9e6abf 2022-05-04 stsp 			return got_error_from_errno("malloc");
432 2d9e6abf 2022-05-04 stsp 		err = got_deflate_init(&zb, *outbuf, GOT_DEFLATE_BUFSIZE);
433 2d9e6abf 2022-05-04 stsp 		if (err) {
434 2d9e6abf 2022-05-04 stsp 			free(*outbuf);
435 2d9e6abf 2022-05-04 stsp 			*outbuf = NULL;
436 2d9e6abf 2022-05-04 stsp 			return err;
437 2d9e6abf 2022-05-04 stsp 		}
438 2d9e6abf 2022-05-04 stsp 	} else {
439 2d9e6abf 2022-05-04 stsp 		err = got_deflate_init(&zb, NULL, GOT_DEFLATE_BUFSIZE);
440 2d9e6abf 2022-05-04 stsp 		if (err)
441 2d9e6abf 2022-05-04 stsp 			return err;
442 2d9e6abf 2022-05-04 stsp 	}
443 2d9e6abf 2022-05-04 stsp 
444 2d9e6abf 2022-05-04 stsp 	*outlen = 0;
445 2d9e6abf 2022-05-04 stsp 	if (consumed_total)
446 2d9e6abf 2022-05-04 stsp 		*consumed_total = 0;
447 2d9e6abf 2022-05-04 stsp 	do {
448 2d9e6abf 2022-05-04 stsp 		err = got_deflate_read_mmap(&zb, map, offset, len, &avail,
449 2d9e6abf 2022-05-04 stsp 		    &consumed);
450 2d9e6abf 2022-05-04 stsp 		if (err)
451 2d9e6abf 2022-05-04 stsp 			goto done;
452 2d9e6abf 2022-05-04 stsp 		offset += consumed;
453 2d9e6abf 2022-05-04 stsp 		if (consumed_total)
454 2d9e6abf 2022-05-04 stsp 			*consumed_total += consumed;
455 2d9e6abf 2022-05-04 stsp 		len -= consumed;
456 2d9e6abf 2022-05-04 stsp 		if (avail > 0 && csum)
457 2d9e6abf 2022-05-04 stsp 			csum_output(csum, zb.outbuf, avail);
458 2d9e6abf 2022-05-04 stsp 		*outlen += avail;
459 2d9e6abf 2022-05-04 stsp 		if ((zb.flags & GOT_DEFLATE_F_HAVE_MORE) && outbuf != NULL) {
460 2d9e6abf 2022-05-04 stsp 			newbuf = reallocarray(*outbuf, ++nbuf,
461 2d9e6abf 2022-05-04 stsp 			    GOT_DEFLATE_BUFSIZE);
462 2d9e6abf 2022-05-04 stsp 			if (newbuf == NULL) {
463 2d9e6abf 2022-05-04 stsp 				err = got_error_from_errno("reallocarray");
464 2d9e6abf 2022-05-04 stsp 				free(*outbuf);
465 2d9e6abf 2022-05-04 stsp 				*outbuf = NULL;
466 2d9e6abf 2022-05-04 stsp 				*outlen = 0;
467 2d9e6abf 2022-05-04 stsp 				goto done;
468 2d9e6abf 2022-05-04 stsp 			}
469 2d9e6abf 2022-05-04 stsp 			*outbuf = newbuf;
470 2d9e6abf 2022-05-04 stsp 			zb.outbuf = newbuf + *outlen;
471 2d9e6abf 2022-05-04 stsp 			zb.outlen = (nbuf * GOT_DEFLATE_BUFSIZE) - *outlen;
472 2d9e6abf 2022-05-04 stsp 		}
473 2d9e6abf 2022-05-04 stsp 	} while (zb.flags & GOT_DEFLATE_F_HAVE_MORE);
474 64a8571e 2022-01-07 stsp done:
475 64a8571e 2022-01-07 stsp 	got_deflate_end(&zb);
476 64a8571e 2022-01-07 stsp 	return err;
477 64a8571e 2022-01-07 stsp }