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 2181e0c8 2019-03-19 stsp #include <zlib.h>
 25 2181e0c8 2019-03-19 stsp #include <time.h>
 26 2181e0c8 2019-03-19 stsp 
 27 2181e0c8 2019-03-19 stsp #include "got_error.h"
 28 2181e0c8 2019-03-19 stsp #include "got_object.h"
 29 324d37e7 2019-05-11 stsp #include "got_path.h"
 30 2181e0c8 2019-03-19 stsp 
 31 2181e0c8 2019-03-19 stsp #include "got_lib_deflate.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 2181e0c8 2019-03-19 stsp 	memset(&zb->z, 0, sizeof(zb->z));
 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 31e61ec1 2021-09-28 naddy 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 72840534 2022-01-19 stsp got_deflate_read(struct got_deflate_buf *zb, FILE *f, off_t len,
 94 72840534 2022-01-19 stsp     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 72840534 2022-01-19 stsp 	*consumed = 0;
105 2181e0c8 2019-03-19 stsp 	do {
106 72840534 2022-01-19 stsp 		size_t last_total_in = z->total_in;
107 2181e0c8 2019-03-19 stsp 		if (z->avail_in == 0) {
108 72840534 2022-01-19 stsp 			size_t n = 0;
109 72840534 2022-01-19 stsp 			if (*consumed < len) {
110 72840534 2022-01-19 stsp 				n = fread(zb->inbuf, 1,
111 72840534 2022-01-19 stsp 				    MIN(zb->inlen, len - *consumed), f);
112 72840534 2022-01-19 stsp 			}
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 72840534 2022-01-19 stsp 		*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 2d9e6abf 2022-05-04 stsp static const struct got_error *
140 2d9e6abf 2022-05-04 stsp deflate_read_mmap(struct got_deflate_buf *zb, uint8_t *map, size_t offset,
141 2d9e6abf 2022-05-04 stsp     size_t len, size_t *outlenp, size_t *consumed, int flush_on_eof)
142 64a8571e 2022-01-07 stsp {
143 64a8571e 2022-01-07 stsp 	z_stream *z = &zb->z;
144 64a8571e 2022-01-07 stsp 	size_t last_total_out = z->total_out;
145 64a8571e 2022-01-07 stsp 	int ret = Z_ERRNO;
146 64a8571e 2022-01-07 stsp 
147 64a8571e 2022-01-07 stsp 	z->next_out = zb->outbuf;
148 64a8571e 2022-01-07 stsp 	z->avail_out = zb->outlen;
149 64a8571e 2022-01-07 stsp 
150 64a8571e 2022-01-07 stsp 	*outlenp = 0;
151 64a8571e 2022-01-07 stsp 	*consumed = 0;
152 64a8571e 2022-01-07 stsp 	do {
153 64a8571e 2022-01-07 stsp 		size_t last_total_in = z->total_in;
154 64a8571e 2022-01-07 stsp 		if (z->avail_in == 0) {
155 64a8571e 2022-01-07 stsp 			z->next_in = map + offset + *consumed;
156 a9bd296d 2022-02-08 stsp 			if (len - *consumed > UINT_MAX)
157 a9bd296d 2022-02-08 stsp 				z->avail_in = UINT_MAX;
158 a9bd296d 2022-02-08 stsp 			else
159 a9bd296d 2022-02-08 stsp 				z->avail_in = len - *consumed;
160 64a8571e 2022-01-07 stsp 			if (z->avail_in == 0) {
161 64a8571e 2022-01-07 stsp 				/* EOF */
162 2d9e6abf 2022-05-04 stsp 				if (flush_on_eof)
163 2d9e6abf 2022-05-04 stsp 					ret = deflate(z, Z_FINISH);
164 64a8571e 2022-01-07 stsp 				break;
165 64a8571e 2022-01-07 stsp 			}
166 64a8571e 2022-01-07 stsp 		}
167 64a8571e 2022-01-07 stsp 		ret = deflate(z, Z_NO_FLUSH);
168 64a8571e 2022-01-07 stsp 		*consumed += z->total_in - last_total_in;
169 64a8571e 2022-01-07 stsp 	} while (ret == Z_OK && z->avail_out > 0);
170 64a8571e 2022-01-07 stsp 
171 64a8571e 2022-01-07 stsp 	if (ret == Z_OK) {
172 64a8571e 2022-01-07 stsp 		zb->flags |= GOT_DEFLATE_F_HAVE_MORE;
173 64a8571e 2022-01-07 stsp 	} else {
174 64a8571e 2022-01-07 stsp 		if (ret != Z_STREAM_END)
175 64a8571e 2022-01-07 stsp 			return got_error(GOT_ERR_COMPRESSION);
176 64a8571e 2022-01-07 stsp 		zb->flags &= ~GOT_DEFLATE_F_HAVE_MORE;
177 64a8571e 2022-01-07 stsp 	}
178 64a8571e 2022-01-07 stsp 
179 64a8571e 2022-01-07 stsp 	*outlenp = z->total_out - last_total_out;
180 2d9e6abf 2022-05-04 stsp 	return NULL;
181 2d9e6abf 2022-05-04 stsp }
182 2d9e6abf 2022-05-04 stsp 
183 2d9e6abf 2022-05-04 stsp const struct got_error *
184 2d9e6abf 2022-05-04 stsp got_deflate_read_mmap(struct got_deflate_buf *zb, uint8_t *map, size_t offset,
185 2d9e6abf 2022-05-04 stsp     size_t len, size_t *outlenp, size_t *consumed)
186 2d9e6abf 2022-05-04 stsp {
187 2d9e6abf 2022-05-04 stsp 	return deflate_read_mmap(zb, map, offset, len, outlenp, consumed, 1);
188 2d9e6abf 2022-05-04 stsp }
189 2d9e6abf 2022-05-04 stsp 
190 2d9e6abf 2022-05-04 stsp const struct got_error *
191 2d9e6abf 2022-05-04 stsp got_deflate_flush(struct got_deflate_buf *zb, FILE *outfile,
192 2d9e6abf 2022-05-04 stsp     struct got_deflate_checksum *csum, off_t *outlenp)
193 2d9e6abf 2022-05-04 stsp {
194 2d9e6abf 2022-05-04 stsp 	int ret;
195 2d9e6abf 2022-05-04 stsp 	size_t n;
196 2d9e6abf 2022-05-04 stsp 	z_stream *z = &zb->z;
197 2d9e6abf 2022-05-04 stsp 
198 2d9e6abf 2022-05-04 stsp 	if (z->avail_in != 0)
199 2d9e6abf 2022-05-04 stsp 		return got_error_msg(GOT_ERR_COMPRESSION,
200 2d9e6abf 2022-05-04 stsp 		    "cannot flush zb with pending input data");
201 2d9e6abf 2022-05-04 stsp 
202 2d9e6abf 2022-05-04 stsp 	do {
203 2d9e6abf 2022-05-04 stsp 		size_t avail, last_total_out = zb->z.total_out;
204 2d9e6abf 2022-05-04 stsp 
205 2d9e6abf 2022-05-04 stsp 		z->next_out = zb->outbuf;
206 2d9e6abf 2022-05-04 stsp 		z->avail_out = zb->outlen;
207 2d9e6abf 2022-05-04 stsp 
208 2d9e6abf 2022-05-04 stsp 		ret = deflate(z, Z_FINISH);
209 2d9e6abf 2022-05-04 stsp 		if (ret != Z_STREAM_END && ret != Z_OK)
210 2d9e6abf 2022-05-04 stsp 			return got_error(GOT_ERR_COMPRESSION);
211 2d9e6abf 2022-05-04 stsp 
212 2d9e6abf 2022-05-04 stsp 		avail = z->total_out - last_total_out;
213 2d9e6abf 2022-05-04 stsp 		if (avail > 0) {
214 2d9e6abf 2022-05-04 stsp 			n = fwrite(zb->outbuf, avail, 1, outfile);
215 2d9e6abf 2022-05-04 stsp 			if (n != 1)
216 2d9e6abf 2022-05-04 stsp 				return got_ferror(outfile, GOT_ERR_IO);
217 2d9e6abf 2022-05-04 stsp 			if (csum)
218 2d9e6abf 2022-05-04 stsp 				csum_output(csum, zb->outbuf, avail);
219 2d9e6abf 2022-05-04 stsp 			if (outlenp)
220 2d9e6abf 2022-05-04 stsp 				*outlenp += avail;
221 2d9e6abf 2022-05-04 stsp 		}
222 2d9e6abf 2022-05-04 stsp 	} while (ret != Z_STREAM_END);
223 2d9e6abf 2022-05-04 stsp 
224 2d9e6abf 2022-05-04 stsp 	zb->flags &= ~GOT_DEFLATE_F_HAVE_MORE;
225 64a8571e 2022-01-07 stsp 	return NULL;
226 64a8571e 2022-01-07 stsp }
227 64a8571e 2022-01-07 stsp 
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 894e4711 2022-10-15 stsp }
236 894e4711 2022-10-15 stsp 
237 894e4711 2022-10-15 stsp const struct got_error *
238 894e4711 2022-10-15 stsp got_deflate_to_fd(off_t *outlen, FILE *infile, off_t len, int outfd,
239 894e4711 2022-10-15 stsp     struct got_deflate_checksum *csum)
240 894e4711 2022-10-15 stsp {
241 894e4711 2022-10-15 stsp 	const struct got_error *err;
242 894e4711 2022-10-15 stsp 	size_t avail;
243 894e4711 2022-10-15 stsp 	off_t consumed;
244 894e4711 2022-10-15 stsp 	struct got_deflate_buf zb;
245 894e4711 2022-10-15 stsp 
246 894e4711 2022-10-15 stsp 	err = got_deflate_init(&zb, NULL, GOT_DEFLATE_BUFSIZE);
247 894e4711 2022-10-15 stsp 	if (err)
248 894e4711 2022-10-15 stsp 		goto done;
249 894e4711 2022-10-15 stsp 
250 894e4711 2022-10-15 stsp 	*outlen = 0;
251 894e4711 2022-10-15 stsp 
252 894e4711 2022-10-15 stsp 	do {
253 894e4711 2022-10-15 stsp 		err = got_deflate_read(&zb, infile, len, &avail, &consumed);
254 894e4711 2022-10-15 stsp 		if (err)
255 894e4711 2022-10-15 stsp 			goto done;
256 894e4711 2022-10-15 stsp 		len -= consumed;
257 894e4711 2022-10-15 stsp 		if (avail > 0) {
258 894e4711 2022-10-15 stsp 			ssize_t w;
259 894e4711 2022-10-15 stsp 			w = write(outfd, zb.outbuf, avail);
260 894e4711 2022-10-15 stsp 			if (w == -1) {
261 894e4711 2022-10-15 stsp 				err = got_error_from_errno("write");
262 894e4711 2022-10-15 stsp 				goto done;
263 894e4711 2022-10-15 stsp 			} else if (w != avail) {
264 894e4711 2022-10-15 stsp 				err = got_error(GOT_ERR_IO);
265 894e4711 2022-10-15 stsp 				goto done;
266 894e4711 2022-10-15 stsp 			}
267 894e4711 2022-10-15 stsp 			if (csum)
268 894e4711 2022-10-15 stsp 				csum_output(csum, zb.outbuf, avail);
269 894e4711 2022-10-15 stsp 			*outlen += avail;
270 894e4711 2022-10-15 stsp 		}
271 894e4711 2022-10-15 stsp 	} while (zb.flags & GOT_DEFLATE_F_HAVE_MORE);
272 894e4711 2022-10-15 stsp 
273 894e4711 2022-10-15 stsp done:
274 894e4711 2022-10-15 stsp 	got_deflate_end(&zb);
275 894e4711 2022-10-15 stsp 	return err;
276 894e4711 2022-10-15 stsp }
277 894e4711 2022-10-15 stsp 
278 894e4711 2022-10-15 stsp const struct got_error *
279 894e4711 2022-10-15 stsp got_deflate_to_fd_mmap(off_t *outlen, uint8_t *map, size_t offset,
280 894e4711 2022-10-15 stsp     size_t len, int outfd, struct got_deflate_checksum *csum)
281 894e4711 2022-10-15 stsp {
282 894e4711 2022-10-15 stsp 	const struct got_error *err;
283 894e4711 2022-10-15 stsp 	size_t avail, consumed;
284 894e4711 2022-10-15 stsp 	struct got_deflate_buf zb;
285 894e4711 2022-10-15 stsp 
286 894e4711 2022-10-15 stsp 	err = got_deflate_init(&zb, NULL, GOT_DEFLATE_BUFSIZE);
287 894e4711 2022-10-15 stsp 	if (err)
288 894e4711 2022-10-15 stsp 		goto done;
289 894e4711 2022-10-15 stsp 
290 894e4711 2022-10-15 stsp 	*outlen = 0;
291 894e4711 2022-10-15 stsp 	do {
292 894e4711 2022-10-15 stsp 		err = got_deflate_read_mmap(&zb, map, offset, len, &avail,
293 894e4711 2022-10-15 stsp 		    &consumed);
294 894e4711 2022-10-15 stsp 		if (err)
295 894e4711 2022-10-15 stsp 			goto done;
296 894e4711 2022-10-15 stsp 		offset += consumed;
297 894e4711 2022-10-15 stsp 		len -= consumed;
298 894e4711 2022-10-15 stsp 		if (avail > 0) {
299 894e4711 2022-10-15 stsp 			ssize_t w;
300 894e4711 2022-10-15 stsp 			w = write(outfd, zb.outbuf, avail);
301 894e4711 2022-10-15 stsp 			if (w == -1) {
302 894e4711 2022-10-15 stsp 				err = got_error_from_errno("write");
303 894e4711 2022-10-15 stsp 				goto done;
304 894e4711 2022-10-15 stsp 			} else if (w != avail) {
305 894e4711 2022-10-15 stsp 				err = got_error(GOT_ERR_IO);
306 894e4711 2022-10-15 stsp 				goto done;
307 894e4711 2022-10-15 stsp 			}
308 894e4711 2022-10-15 stsp 			if (csum)
309 894e4711 2022-10-15 stsp 				csum_output(csum, zb.outbuf, avail);
310 894e4711 2022-10-15 stsp 			*outlen += avail;
311 894e4711 2022-10-15 stsp 		}
312 894e4711 2022-10-15 stsp 	} while (zb.flags & GOT_DEFLATE_F_HAVE_MORE);
313 894e4711 2022-10-15 stsp 
314 894e4711 2022-10-15 stsp done:
315 894e4711 2022-10-15 stsp 	got_deflate_end(&zb);
316 894e4711 2022-10-15 stsp 	return err;
317 2181e0c8 2019-03-19 stsp }
318 2181e0c8 2019-03-19 stsp 
319 2181e0c8 2019-03-19 stsp const struct got_error *
320 72840534 2022-01-19 stsp got_deflate_to_file(off_t *outlen, FILE *infile, off_t len,
321 72840534 2022-01-19 stsp     FILE *outfile, struct got_deflate_checksum *csum)
322 2181e0c8 2019-03-19 stsp {
323 2181e0c8 2019-03-19 stsp 	const struct got_error *err;
324 2181e0c8 2019-03-19 stsp 	size_t avail;
325 72840534 2022-01-19 stsp 	off_t consumed;
326 2181e0c8 2019-03-19 stsp 	struct got_deflate_buf zb;
327 2181e0c8 2019-03-19 stsp 
328 3b9e6fcf 2021-06-05 stsp 	err = got_deflate_init(&zb, NULL, GOT_DEFLATE_BUFSIZE);
329 2181e0c8 2019-03-19 stsp 	if (err)
330 2181e0c8 2019-03-19 stsp 		goto done;
331 2181e0c8 2019-03-19 stsp 
332 2181e0c8 2019-03-19 stsp 	*outlen = 0;
333 2181e0c8 2019-03-19 stsp 
334 2181e0c8 2019-03-19 stsp 	do {
335 72840534 2022-01-19 stsp 		err = got_deflate_read(&zb, infile, len, &avail, &consumed);
336 2181e0c8 2019-03-19 stsp 		if (err)
337 2181e0c8 2019-03-19 stsp 			goto done;
338 72840534 2022-01-19 stsp 		len -= consumed;
339 2181e0c8 2019-03-19 stsp 		if (avail > 0) {
340 2181e0c8 2019-03-19 stsp 			size_t n;
341 2181e0c8 2019-03-19 stsp 			n = fwrite(zb.outbuf, avail, 1, outfile);
342 2181e0c8 2019-03-19 stsp 			if (n != 1) {
343 2181e0c8 2019-03-19 stsp 				err = got_ferror(outfile, GOT_ERR_IO);
344 2181e0c8 2019-03-19 stsp 				goto done;
345 2181e0c8 2019-03-19 stsp 			}
346 3b9e6fcf 2021-06-05 stsp 			if (csum)
347 3b9e6fcf 2021-06-05 stsp 				csum_output(csum, zb.outbuf, avail);
348 2181e0c8 2019-03-19 stsp 			*outlen += avail;
349 2181e0c8 2019-03-19 stsp 		}
350 2181e0c8 2019-03-19 stsp 	} while (zb.flags & GOT_DEFLATE_F_HAVE_MORE);
351 2181e0c8 2019-03-19 stsp 
352 2181e0c8 2019-03-19 stsp done:
353 2181e0c8 2019-03-19 stsp 	got_deflate_end(&zb);
354 2181e0c8 2019-03-19 stsp 	return err;
355 2181e0c8 2019-03-19 stsp }
356 64a8571e 2022-01-07 stsp 
357 64a8571e 2022-01-07 stsp const struct got_error *
358 72840534 2022-01-19 stsp got_deflate_to_file_mmap(off_t *outlen, uint8_t *map, size_t offset,
359 64a8571e 2022-01-07 stsp     size_t len, FILE *outfile, struct got_deflate_checksum *csum)
360 64a8571e 2022-01-07 stsp {
361 64a8571e 2022-01-07 stsp 	const struct got_error *err;
362 64a8571e 2022-01-07 stsp 	size_t avail, consumed;
363 64a8571e 2022-01-07 stsp 	struct got_deflate_buf zb;
364 64a8571e 2022-01-07 stsp 
365 64a8571e 2022-01-07 stsp 	err = got_deflate_init(&zb, NULL, GOT_DEFLATE_BUFSIZE);
366 64a8571e 2022-01-07 stsp 	if (err)
367 64a8571e 2022-01-07 stsp 		goto done;
368 64a8571e 2022-01-07 stsp 
369 64a8571e 2022-01-07 stsp 	*outlen = 0;
370 64a8571e 2022-01-07 stsp 	do {
371 64a8571e 2022-01-07 stsp 		err = got_deflate_read_mmap(&zb, map, offset, len, &avail,
372 64a8571e 2022-01-07 stsp 		    &consumed);
373 64a8571e 2022-01-07 stsp 		if (err)
374 64a8571e 2022-01-07 stsp 			goto done;
375 64a8571e 2022-01-07 stsp 		offset += consumed;
376 64a8571e 2022-01-07 stsp 		len -= consumed;
377 64a8571e 2022-01-07 stsp 		if (avail > 0) {
378 64a8571e 2022-01-07 stsp 			size_t n;
379 64a8571e 2022-01-07 stsp 			n = fwrite(zb.outbuf, avail, 1, outfile);
380 64a8571e 2022-01-07 stsp 			if (n != 1) {
381 64a8571e 2022-01-07 stsp 				err = got_ferror(outfile, GOT_ERR_IO);
382 64a8571e 2022-01-07 stsp 				goto done;
383 64a8571e 2022-01-07 stsp 			}
384 64a8571e 2022-01-07 stsp 			if (csum)
385 64a8571e 2022-01-07 stsp 				csum_output(csum, zb.outbuf, avail);
386 64a8571e 2022-01-07 stsp 			*outlen += avail;
387 64a8571e 2022-01-07 stsp 		}
388 64a8571e 2022-01-07 stsp 	} while (zb.flags & GOT_DEFLATE_F_HAVE_MORE);
389 2d9e6abf 2022-05-04 stsp 
390 2d9e6abf 2022-05-04 stsp done:
391 2d9e6abf 2022-05-04 stsp 	got_deflate_end(&zb);
392 2d9e6abf 2022-05-04 stsp 	return err;
393 2d9e6abf 2022-05-04 stsp }
394 2d9e6abf 2022-05-04 stsp 
395 2d9e6abf 2022-05-04 stsp const struct got_error *
396 2d9e6abf 2022-05-04 stsp got_deflate_append_to_file_mmap(struct got_deflate_buf *zb, off_t *outlen,
397 2d9e6abf 2022-05-04 stsp     uint8_t *map, size_t offset, size_t len, FILE *outfile,
398 2d9e6abf 2022-05-04 stsp     struct got_deflate_checksum *csum)
399 2d9e6abf 2022-05-04 stsp {
400 2d9e6abf 2022-05-04 stsp 	const struct got_error *err;
401 2d9e6abf 2022-05-04 stsp 	size_t avail, consumed;
402 2d9e6abf 2022-05-04 stsp 
403 2d9e6abf 2022-05-04 stsp 	do {
404 2d9e6abf 2022-05-04 stsp 		err = deflate_read_mmap(zb, map, offset, len, &avail,
405 2d9e6abf 2022-05-04 stsp 		    &consumed, 0);
406 2d9e6abf 2022-05-04 stsp 		if (err)
407 2d9e6abf 2022-05-04 stsp 			break;
408 2d9e6abf 2022-05-04 stsp 		offset += consumed;
409 2d9e6abf 2022-05-04 stsp 		len -= consumed;
410 2d9e6abf 2022-05-04 stsp 		if (avail > 0) {
411 2d9e6abf 2022-05-04 stsp 			size_t n;
412 2d9e6abf 2022-05-04 stsp 			n = fwrite(zb->outbuf, avail, 1, outfile);
413 2d9e6abf 2022-05-04 stsp 			if (n != 1) {
414 2d9e6abf 2022-05-04 stsp 				err = got_ferror(outfile, GOT_ERR_IO);
415 2d9e6abf 2022-05-04 stsp 				break;
416 2d9e6abf 2022-05-04 stsp 			}
417 2d9e6abf 2022-05-04 stsp 			if (csum)
418 2d9e6abf 2022-05-04 stsp 				csum_output(csum, zb->outbuf, avail);
419 2d9e6abf 2022-05-04 stsp 			if (outlen)
420 2d9e6abf 2022-05-04 stsp 				*outlen += avail;
421 2d9e6abf 2022-05-04 stsp 		}
422 2d9e6abf 2022-05-04 stsp 	} while ((zb->flags & GOT_DEFLATE_F_HAVE_MORE) && len > 0);
423 64a8571e 2022-01-07 stsp 
424 2d9e6abf 2022-05-04 stsp 	return err;
425 2d9e6abf 2022-05-04 stsp }
426 2d9e6abf 2022-05-04 stsp 
427 2d9e6abf 2022-05-04 stsp const struct got_error *
428 2d9e6abf 2022-05-04 stsp got_deflate_to_mem_mmap(uint8_t **outbuf, size_t *outlen,
429 2d9e6abf 2022-05-04 stsp     size_t *consumed_total, struct got_deflate_checksum *csum, uint8_t *map,
430 2d9e6abf 2022-05-04 stsp     size_t offset, size_t len)
431 2d9e6abf 2022-05-04 stsp {
432 2d9e6abf 2022-05-04 stsp 	const struct got_error *err;
433 2d9e6abf 2022-05-04 stsp 	size_t avail, consumed;
434 2d9e6abf 2022-05-04 stsp 	struct got_deflate_buf zb;
435 2d9e6abf 2022-05-04 stsp 	void *newbuf;
436 2d9e6abf 2022-05-04 stsp 	size_t nbuf = 1;
437 2d9e6abf 2022-05-04 stsp 
438 2d9e6abf 2022-05-04 stsp 	if (outbuf) {
439 2d9e6abf 2022-05-04 stsp 		*outbuf = malloc(GOT_DEFLATE_BUFSIZE);
440 2d9e6abf 2022-05-04 stsp 		if (*outbuf == NULL)
441 2d9e6abf 2022-05-04 stsp 			return got_error_from_errno("malloc");
442 2d9e6abf 2022-05-04 stsp 		err = got_deflate_init(&zb, *outbuf, GOT_DEFLATE_BUFSIZE);
443 2d9e6abf 2022-05-04 stsp 		if (err) {
444 2d9e6abf 2022-05-04 stsp 			free(*outbuf);
445 2d9e6abf 2022-05-04 stsp 			*outbuf = NULL;
446 2d9e6abf 2022-05-04 stsp 			return err;
447 2d9e6abf 2022-05-04 stsp 		}
448 2d9e6abf 2022-05-04 stsp 	} else {
449 2d9e6abf 2022-05-04 stsp 		err = got_deflate_init(&zb, NULL, GOT_DEFLATE_BUFSIZE);
450 2d9e6abf 2022-05-04 stsp 		if (err)
451 2d9e6abf 2022-05-04 stsp 			return err;
452 2d9e6abf 2022-05-04 stsp 	}
453 2d9e6abf 2022-05-04 stsp 
454 2d9e6abf 2022-05-04 stsp 	*outlen = 0;
455 2d9e6abf 2022-05-04 stsp 	if (consumed_total)
456 2d9e6abf 2022-05-04 stsp 		*consumed_total = 0;
457 2d9e6abf 2022-05-04 stsp 	do {
458 2d9e6abf 2022-05-04 stsp 		err = got_deflate_read_mmap(&zb, map, offset, len, &avail,
459 2d9e6abf 2022-05-04 stsp 		    &consumed);
460 2d9e6abf 2022-05-04 stsp 		if (err)
461 2d9e6abf 2022-05-04 stsp 			goto done;
462 2d9e6abf 2022-05-04 stsp 		offset += consumed;
463 2d9e6abf 2022-05-04 stsp 		if (consumed_total)
464 2d9e6abf 2022-05-04 stsp 			*consumed_total += consumed;
465 2d9e6abf 2022-05-04 stsp 		len -= consumed;
466 2d9e6abf 2022-05-04 stsp 		if (avail > 0 && csum)
467 2d9e6abf 2022-05-04 stsp 			csum_output(csum, zb.outbuf, avail);
468 2d9e6abf 2022-05-04 stsp 		*outlen += avail;
469 2d9e6abf 2022-05-04 stsp 		if ((zb.flags & GOT_DEFLATE_F_HAVE_MORE) && outbuf != NULL) {
470 2d9e6abf 2022-05-04 stsp 			newbuf = reallocarray(*outbuf, ++nbuf,
471 2d9e6abf 2022-05-04 stsp 			    GOT_DEFLATE_BUFSIZE);
472 2d9e6abf 2022-05-04 stsp 			if (newbuf == NULL) {
473 2d9e6abf 2022-05-04 stsp 				err = got_error_from_errno("reallocarray");
474 2d9e6abf 2022-05-04 stsp 				free(*outbuf);
475 2d9e6abf 2022-05-04 stsp 				*outbuf = NULL;
476 2d9e6abf 2022-05-04 stsp 				*outlen = 0;
477 2d9e6abf 2022-05-04 stsp 				goto done;
478 2d9e6abf 2022-05-04 stsp 			}
479 2d9e6abf 2022-05-04 stsp 			*outbuf = newbuf;
480 2d9e6abf 2022-05-04 stsp 			zb.outbuf = newbuf + *outlen;
481 2d9e6abf 2022-05-04 stsp 			zb.outlen = (nbuf * GOT_DEFLATE_BUFSIZE) - *outlen;
482 2d9e6abf 2022-05-04 stsp 		}
483 2d9e6abf 2022-05-04 stsp 	} while (zb.flags & GOT_DEFLATE_F_HAVE_MORE);
484 64a8571e 2022-01-07 stsp done:
485 64a8571e 2022-01-07 stsp 	got_deflate_end(&zb);
486 64a8571e 2022-01-07 stsp 	return err;
487 64a8571e 2022-01-07 stsp }