1 2181e0c8 2019-03-19 stsp /*
  2 2181e0c8 2019-03-19 stsp  * Copyright (c) 2019 Stefan Sperling <stsp@openbsd.org>
  3 2181e0c8 2019-03-19 stsp  *
  4 2181e0c8 2019-03-19 stsp  * Permission to use, copy, modify, and distribute this software for any
  5 2181e0c8 2019-03-19 stsp  * purpose with or without fee is hereby granted, provided that the above
  6 2181e0c8 2019-03-19 stsp  * copyright notice and this permission notice appear in all copies.
  7 2181e0c8 2019-03-19 stsp  *
  8 2181e0c8 2019-03-19 stsp  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  9 2181e0c8 2019-03-19 stsp  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 10 2181e0c8 2019-03-19 stsp  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 11 2181e0c8 2019-03-19 stsp  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 12 2181e0c8 2019-03-19 stsp  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 13 2181e0c8 2019-03-19 stsp  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 14 2181e0c8 2019-03-19 stsp  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 15 2181e0c8 2019-03-19 stsp  */
 16 2181e0c8 2019-03-19 stsp 
 17 2181e0c8 2019-03-19 stsp #include <sys/queue.h>
 18 2181e0c8 2019-03-19 stsp 
 19 2181e0c8 2019-03-19 stsp #include <errno.h>
 20 2181e0c8 2019-03-19 stsp #include <stdio.h>
 21 2181e0c8 2019-03-19 stsp #include <stdlib.h>
 22 2181e0c8 2019-03-19 stsp #include <string.h>
 23 2181e0c8 2019-03-19 stsp #include <sha1.h>
 24 5822e79e 2023-02-23 op #include <sha2.h>
 25 2181e0c8 2019-03-19 stsp #include <zlib.h>
 26 2181e0c8 2019-03-19 stsp #include <time.h>
 27 2181e0c8 2019-03-19 stsp 
 28 2181e0c8 2019-03-19 stsp #include "got_error.h"
 29 2181e0c8 2019-03-19 stsp #include "got_object.h"
 30 324d37e7 2019-05-11 stsp #include "got_path.h"
 31 2181e0c8 2019-03-19 stsp 
 32 2181e0c8 2019-03-19 stsp #include "got_lib_deflate.h"
 33 ae25a666 2023-02-23 op #include "got_lib_hash.h"
 34 13b2bc37 2022-10-23 stsp #include "got_lib_poll.h"
 35 2181e0c8 2019-03-19 stsp 
 36 2181e0c8 2019-03-19 stsp #ifndef MIN
 37 2181e0c8 2019-03-19 stsp #define	MIN(_a,_b) ((_a) < (_b) ? (_a) : (_b))
 38 2181e0c8 2019-03-19 stsp #endif
 39 2181e0c8 2019-03-19 stsp 
 40 d71015b3 2023-09-01 stsp static const struct got_error *
 41 d71015b3 2023-09-01 stsp wrap_deflate_error(int zerr, const char *prefix)
 42 d71015b3 2023-09-01 stsp {
 43 d71015b3 2023-09-01 stsp 	if  (zerr == Z_ERRNO)
 44 d71015b3 2023-09-01 stsp 		return got_error_from_errno(prefix);
 45 d71015b3 2023-09-01 stsp 	if  (zerr == Z_MEM_ERROR)
 46 d71015b3 2023-09-01 stsp 		return got_error_set_errno(ENOMEM, prefix);
 47 d71015b3 2023-09-01 stsp 
 48 d71015b3 2023-09-01 stsp 	return got_error(GOT_ERR_COMPRESSION);
 49 d71015b3 2023-09-01 stsp }
 50 d71015b3 2023-09-01 stsp 
 51 2181e0c8 2019-03-19 stsp const struct got_error *
 52 3b9e6fcf 2021-06-05 stsp got_deflate_init(struct got_deflate_buf *zb, uint8_t *outbuf, size_t bufsize)
 53 2181e0c8 2019-03-19 stsp {
 54 2181e0c8 2019-03-19 stsp 	const struct got_error *err = NULL;
 55 2181e0c8 2019-03-19 stsp 	int zerr;
 56 2181e0c8 2019-03-19 stsp 
 57 0fc5e229 2022-11-08 stsp 	memset(zb, 0, sizeof(*zb));
 58 2181e0c8 2019-03-19 stsp 
 59 2181e0c8 2019-03-19 stsp 	zb->z.zalloc = Z_NULL;
 60 2181e0c8 2019-03-19 stsp 	zb->z.zfree = Z_NULL;
 61 2181e0c8 2019-03-19 stsp 	zerr = deflateInit(&zb->z, Z_DEFAULT_COMPRESSION);
 62 d71015b3 2023-09-01 stsp 	if (zerr != Z_OK)
 63 d71015b3 2023-09-01 stsp 		return wrap_deflate_error(zerr, "deflateInit");
 64 2181e0c8 2019-03-19 stsp 
 65 2181e0c8 2019-03-19 stsp 	zb->inlen = zb->outlen = bufsize;
 66 2181e0c8 2019-03-19 stsp 
 67 2181e0c8 2019-03-19 stsp 	zb->inbuf = calloc(1, zb->inlen);
 68 2181e0c8 2019-03-19 stsp 	if (zb->inbuf == NULL) {
 69 638f9024 2019-05-13 stsp 		err = got_error_from_errno("calloc");
 70 2181e0c8 2019-03-19 stsp 		goto done;
 71 2181e0c8 2019-03-19 stsp 	}
 72 2181e0c8 2019-03-19 stsp 
 73 2181e0c8 2019-03-19 stsp 	zb->flags = 0;
 74 2181e0c8 2019-03-19 stsp 	if (outbuf == NULL) {
 75 2181e0c8 2019-03-19 stsp 		zb->outbuf = calloc(1, zb->outlen);
 76 2181e0c8 2019-03-19 stsp 		if (zb->outbuf == NULL) {
 77 638f9024 2019-05-13 stsp 			err = got_error_from_errno("calloc");
 78 2181e0c8 2019-03-19 stsp 			goto done;
 79 2181e0c8 2019-03-19 stsp 		}
 80 2181e0c8 2019-03-19 stsp 		zb->flags |= GOT_DEFLATE_F_OWN_OUTBUF;
 81 2181e0c8 2019-03-19 stsp 	} else
 82 2181e0c8 2019-03-19 stsp 		zb->outbuf = outbuf;
 83 2181e0c8 2019-03-19 stsp done:
 84 2181e0c8 2019-03-19 stsp 	if (err)
 85 2181e0c8 2019-03-19 stsp 		got_deflate_end(zb);
 86 2181e0c8 2019-03-19 stsp 	return err;
 87 2181e0c8 2019-03-19 stsp }
 88 2181e0c8 2019-03-19 stsp 
 89 91b40e30 2021-05-21 stsp static void
 90 31e61ec1 2021-09-28 naddy csum_output(struct got_deflate_checksum *csum, const uint8_t *buf, size_t len)
 91 91b40e30 2021-05-21 stsp {
 92 91b40e30 2021-05-21 stsp 	if (csum->output_crc)
 93 91b40e30 2021-05-21 stsp 		*csum->output_crc = crc32(*csum->output_crc, buf, len);
 94 91b40e30 2021-05-21 stsp 
 95 ae25a666 2023-02-23 op 	if (csum->output_ctx)
 96 ae25a666 2023-02-23 op 		got_hash_update(csum->output_ctx, buf, len);
 97 91b40e30 2021-05-21 stsp }
 98 91b40e30 2021-05-21 stsp 
 99 2181e0c8 2019-03-19 stsp const struct got_error *
100 72840534 2022-01-19 stsp got_deflate_read(struct got_deflate_buf *zb, FILE *f, off_t len,
101 72840534 2022-01-19 stsp     size_t *outlenp, off_t *consumed)
102 2181e0c8 2019-03-19 stsp {
103 2181e0c8 2019-03-19 stsp 	size_t last_total_out = zb->z.total_out;
104 2181e0c8 2019-03-19 stsp 	z_stream *z = &zb->z;
105 2181e0c8 2019-03-19 stsp 	int ret = Z_ERRNO;
106 2181e0c8 2019-03-19 stsp 
107 2181e0c8 2019-03-19 stsp 	z->next_out = zb->outbuf;
108 2181e0c8 2019-03-19 stsp 	z->avail_out = zb->outlen;
109 2181e0c8 2019-03-19 stsp 
110 2181e0c8 2019-03-19 stsp 	*outlenp = 0;
111 72840534 2022-01-19 stsp 	*consumed = 0;
112 2181e0c8 2019-03-19 stsp 	do {
113 72840534 2022-01-19 stsp 		size_t last_total_in = z->total_in;
114 2181e0c8 2019-03-19 stsp 		if (z->avail_in == 0) {
115 72840534 2022-01-19 stsp 			size_t n = 0;
116 72840534 2022-01-19 stsp 			if (*consumed < len) {
117 72840534 2022-01-19 stsp 				n = fread(zb->inbuf, 1,
118 72840534 2022-01-19 stsp 				    MIN(zb->inlen, len - *consumed), f);
119 72840534 2022-01-19 stsp 			}
120 2181e0c8 2019-03-19 stsp 			if (n == 0) {
121 2181e0c8 2019-03-19 stsp 				if (ferror(f))
122 2181e0c8 2019-03-19 stsp 					return got_ferror(f, GOT_ERR_IO);
123 2181e0c8 2019-03-19 stsp 				/* EOF */
124 4e4a7005 2019-04-13 stsp 				ret = deflate(z, Z_FINISH);
125 2181e0c8 2019-03-19 stsp 				break;
126 2181e0c8 2019-03-19 stsp 			}
127 2181e0c8 2019-03-19 stsp 			z->next_in = zb->inbuf;
128 2181e0c8 2019-03-19 stsp 			z->avail_in = n;
129 2181e0c8 2019-03-19 stsp 		}
130 2181e0c8 2019-03-19 stsp 		ret = deflate(z, Z_NO_FLUSH);
131 72840534 2022-01-19 stsp 		*consumed += z->total_in - last_total_in;
132 2181e0c8 2019-03-19 stsp 	} while (ret == Z_OK && z->avail_out > 0);
133 2181e0c8 2019-03-19 stsp 
134 2181e0c8 2019-03-19 stsp 	if (ret == Z_OK) {
135 2181e0c8 2019-03-19 stsp 		zb->flags |= GOT_DEFLATE_F_HAVE_MORE;
136 2181e0c8 2019-03-19 stsp 	} else {
137 2181e0c8 2019-03-19 stsp 		if (ret != Z_STREAM_END)
138 d71015b3 2023-09-01 stsp 			return wrap_deflate_error(ret, "deflate");
139 2181e0c8 2019-03-19 stsp 		zb->flags &= ~GOT_DEFLATE_F_HAVE_MORE;
140 2181e0c8 2019-03-19 stsp 	}
141 2181e0c8 2019-03-19 stsp 
142 2181e0c8 2019-03-19 stsp 	*outlenp = z->total_out - last_total_out;
143 2181e0c8 2019-03-19 stsp 	return NULL;
144 2181e0c8 2019-03-19 stsp }
145 2181e0c8 2019-03-19 stsp 
146 2d9e6abf 2022-05-04 stsp static const struct got_error *
147 2d9e6abf 2022-05-04 stsp deflate_read_mmap(struct got_deflate_buf *zb, uint8_t *map, size_t offset,
148 2d9e6abf 2022-05-04 stsp     size_t len, size_t *outlenp, size_t *consumed, int flush_on_eof)
149 64a8571e 2022-01-07 stsp {
150 64a8571e 2022-01-07 stsp 	z_stream *z = &zb->z;
151 64a8571e 2022-01-07 stsp 	size_t last_total_out = z->total_out;
152 64a8571e 2022-01-07 stsp 	int ret = Z_ERRNO;
153 64a8571e 2022-01-07 stsp 
154 64a8571e 2022-01-07 stsp 	z->next_out = zb->outbuf;
155 64a8571e 2022-01-07 stsp 	z->avail_out = zb->outlen;
156 64a8571e 2022-01-07 stsp 
157 64a8571e 2022-01-07 stsp 	*outlenp = 0;
158 64a8571e 2022-01-07 stsp 	*consumed = 0;
159 64a8571e 2022-01-07 stsp 	do {
160 64a8571e 2022-01-07 stsp 		size_t last_total_in = z->total_in;
161 64a8571e 2022-01-07 stsp 		if (z->avail_in == 0) {
162 64a8571e 2022-01-07 stsp 			z->next_in = map + offset + *consumed;
163 a9bd296d 2022-02-08 stsp 			if (len - *consumed > UINT_MAX)
164 a9bd296d 2022-02-08 stsp 				z->avail_in = UINT_MAX;
165 a9bd296d 2022-02-08 stsp 			else
166 a9bd296d 2022-02-08 stsp 				z->avail_in = len - *consumed;
167 64a8571e 2022-01-07 stsp 			if (z->avail_in == 0) {
168 64a8571e 2022-01-07 stsp 				/* EOF */
169 2d9e6abf 2022-05-04 stsp 				if (flush_on_eof)
170 2d9e6abf 2022-05-04 stsp 					ret = deflate(z, Z_FINISH);
171 64a8571e 2022-01-07 stsp 				break;
172 64a8571e 2022-01-07 stsp 			}
173 64a8571e 2022-01-07 stsp 		}
174 64a8571e 2022-01-07 stsp 		ret = deflate(z, Z_NO_FLUSH);
175 64a8571e 2022-01-07 stsp 		*consumed += z->total_in - last_total_in;
176 64a8571e 2022-01-07 stsp 	} while (ret == Z_OK && z->avail_out > 0);
177 64a8571e 2022-01-07 stsp 
178 64a8571e 2022-01-07 stsp 	if (ret == Z_OK) {
179 64a8571e 2022-01-07 stsp 		zb->flags |= GOT_DEFLATE_F_HAVE_MORE;
180 64a8571e 2022-01-07 stsp 	} else {
181 64a8571e 2022-01-07 stsp 		if (ret != Z_STREAM_END)
182 d71015b3 2023-09-01 stsp 			return wrap_deflate_error(ret, "deflate");
183 64a8571e 2022-01-07 stsp 		zb->flags &= ~GOT_DEFLATE_F_HAVE_MORE;
184 64a8571e 2022-01-07 stsp 	}
185 64a8571e 2022-01-07 stsp 
186 64a8571e 2022-01-07 stsp 	*outlenp = z->total_out - last_total_out;
187 2d9e6abf 2022-05-04 stsp 	return NULL;
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_read_mmap(struct got_deflate_buf *zb, uint8_t *map, size_t offset,
192 2d9e6abf 2022-05-04 stsp     size_t len, size_t *outlenp, size_t *consumed)
193 2d9e6abf 2022-05-04 stsp {
194 2d9e6abf 2022-05-04 stsp 	return deflate_read_mmap(zb, map, offset, len, outlenp, consumed, 1);
195 2d9e6abf 2022-05-04 stsp }
196 2d9e6abf 2022-05-04 stsp 
197 2d9e6abf 2022-05-04 stsp const struct got_error *
198 2d9e6abf 2022-05-04 stsp got_deflate_flush(struct got_deflate_buf *zb, FILE *outfile,
199 2d9e6abf 2022-05-04 stsp     struct got_deflate_checksum *csum, off_t *outlenp)
200 2d9e6abf 2022-05-04 stsp {
201 2d9e6abf 2022-05-04 stsp 	int ret;
202 2d9e6abf 2022-05-04 stsp 	size_t n;
203 2d9e6abf 2022-05-04 stsp 	z_stream *z = &zb->z;
204 2d9e6abf 2022-05-04 stsp 
205 2d9e6abf 2022-05-04 stsp 	if (z->avail_in != 0)
206 2d9e6abf 2022-05-04 stsp 		return got_error_msg(GOT_ERR_COMPRESSION,
207 2d9e6abf 2022-05-04 stsp 		    "cannot flush zb with pending input data");
208 2d9e6abf 2022-05-04 stsp 
209 2d9e6abf 2022-05-04 stsp 	do {
210 2d9e6abf 2022-05-04 stsp 		size_t avail, last_total_out = zb->z.total_out;
211 2d9e6abf 2022-05-04 stsp 
212 2d9e6abf 2022-05-04 stsp 		z->next_out = zb->outbuf;
213 2d9e6abf 2022-05-04 stsp 		z->avail_out = zb->outlen;
214 2d9e6abf 2022-05-04 stsp 
215 2d9e6abf 2022-05-04 stsp 		ret = deflate(z, Z_FINISH);
216 2d9e6abf 2022-05-04 stsp 		if (ret != Z_STREAM_END && ret != Z_OK)
217 d71015b3 2023-09-01 stsp 			return wrap_deflate_error(ret, "deflate");
218 2d9e6abf 2022-05-04 stsp 
219 2d9e6abf 2022-05-04 stsp 		avail = z->total_out - last_total_out;
220 2d9e6abf 2022-05-04 stsp 		if (avail > 0) {
221 2d9e6abf 2022-05-04 stsp 			n = fwrite(zb->outbuf, avail, 1, outfile);
222 2d9e6abf 2022-05-04 stsp 			if (n != 1)
223 2d9e6abf 2022-05-04 stsp 				return got_ferror(outfile, GOT_ERR_IO);
224 2d9e6abf 2022-05-04 stsp 			if (csum)
225 2d9e6abf 2022-05-04 stsp 				csum_output(csum, zb->outbuf, avail);
226 2d9e6abf 2022-05-04 stsp 			if (outlenp)
227 2d9e6abf 2022-05-04 stsp 				*outlenp += avail;
228 2d9e6abf 2022-05-04 stsp 		}
229 2d9e6abf 2022-05-04 stsp 	} while (ret != Z_STREAM_END);
230 2d9e6abf 2022-05-04 stsp 
231 2d9e6abf 2022-05-04 stsp 	zb->flags &= ~GOT_DEFLATE_F_HAVE_MORE;
232 64a8571e 2022-01-07 stsp 	return NULL;
233 64a8571e 2022-01-07 stsp }
234 64a8571e 2022-01-07 stsp 
235 2181e0c8 2019-03-19 stsp void
236 2181e0c8 2019-03-19 stsp got_deflate_end(struct got_deflate_buf *zb)
237 2181e0c8 2019-03-19 stsp {
238 2181e0c8 2019-03-19 stsp 	free(zb->inbuf);
239 2181e0c8 2019-03-19 stsp 	if (zb->flags & GOT_DEFLATE_F_OWN_OUTBUF)
240 2181e0c8 2019-03-19 stsp 		free(zb->outbuf);
241 2181e0c8 2019-03-19 stsp 	deflateEnd(&zb->z);
242 894e4711 2022-10-15 stsp }
243 894e4711 2022-10-15 stsp 
244 894e4711 2022-10-15 stsp const struct got_error *
245 894e4711 2022-10-15 stsp got_deflate_to_fd(off_t *outlen, FILE *infile, off_t len, int outfd,
246 894e4711 2022-10-15 stsp     struct got_deflate_checksum *csum)
247 894e4711 2022-10-15 stsp {
248 894e4711 2022-10-15 stsp 	const struct got_error *err;
249 894e4711 2022-10-15 stsp 	size_t avail;
250 894e4711 2022-10-15 stsp 	off_t consumed;
251 894e4711 2022-10-15 stsp 	struct got_deflate_buf zb;
252 894e4711 2022-10-15 stsp 
253 894e4711 2022-10-15 stsp 	err = got_deflate_init(&zb, NULL, GOT_DEFLATE_BUFSIZE);
254 894e4711 2022-10-15 stsp 	if (err)
255 894e4711 2022-10-15 stsp 		goto done;
256 894e4711 2022-10-15 stsp 
257 894e4711 2022-10-15 stsp 	*outlen = 0;
258 894e4711 2022-10-15 stsp 
259 894e4711 2022-10-15 stsp 	do {
260 894e4711 2022-10-15 stsp 		err = got_deflate_read(&zb, infile, len, &avail, &consumed);
261 894e4711 2022-10-15 stsp 		if (err)
262 894e4711 2022-10-15 stsp 			goto done;
263 894e4711 2022-10-15 stsp 		len -= consumed;
264 894e4711 2022-10-15 stsp 		if (avail > 0) {
265 13b2bc37 2022-10-23 stsp 			err = got_poll_write_full(outfd, zb.outbuf, avail);
266 13b2bc37 2022-10-23 stsp 			if (err)
267 894e4711 2022-10-15 stsp 				goto done;
268 894e4711 2022-10-15 stsp 			if (csum)
269 894e4711 2022-10-15 stsp 				csum_output(csum, zb.outbuf, avail);
270 894e4711 2022-10-15 stsp 			*outlen += avail;
271 894e4711 2022-10-15 stsp 		}
272 894e4711 2022-10-15 stsp 	} while (zb.flags & GOT_DEFLATE_F_HAVE_MORE);
273 894e4711 2022-10-15 stsp 
274 894e4711 2022-10-15 stsp done:
275 894e4711 2022-10-15 stsp 	got_deflate_end(&zb);
276 894e4711 2022-10-15 stsp 	return err;
277 894e4711 2022-10-15 stsp }
278 894e4711 2022-10-15 stsp 
279 894e4711 2022-10-15 stsp const struct got_error *
280 894e4711 2022-10-15 stsp got_deflate_to_fd_mmap(off_t *outlen, uint8_t *map, size_t offset,
281 894e4711 2022-10-15 stsp     size_t len, int outfd, struct got_deflate_checksum *csum)
282 894e4711 2022-10-15 stsp {
283 894e4711 2022-10-15 stsp 	const struct got_error *err;
284 894e4711 2022-10-15 stsp 	size_t avail, consumed;
285 894e4711 2022-10-15 stsp 	struct got_deflate_buf zb;
286 894e4711 2022-10-15 stsp 
287 894e4711 2022-10-15 stsp 	err = got_deflate_init(&zb, NULL, GOT_DEFLATE_BUFSIZE);
288 894e4711 2022-10-15 stsp 	if (err)
289 894e4711 2022-10-15 stsp 		goto done;
290 894e4711 2022-10-15 stsp 
291 894e4711 2022-10-15 stsp 	*outlen = 0;
292 894e4711 2022-10-15 stsp 	do {
293 894e4711 2022-10-15 stsp 		err = got_deflate_read_mmap(&zb, map, offset, len, &avail,
294 894e4711 2022-10-15 stsp 		    &consumed);
295 894e4711 2022-10-15 stsp 		if (err)
296 894e4711 2022-10-15 stsp 			goto done;
297 894e4711 2022-10-15 stsp 		offset += consumed;
298 894e4711 2022-10-15 stsp 		len -= consumed;
299 894e4711 2022-10-15 stsp 		if (avail > 0) {
300 13b2bc37 2022-10-23 stsp 			err = got_poll_write_full(outfd, zb.outbuf, avail);
301 13b2bc37 2022-10-23 stsp 			if (err)
302 894e4711 2022-10-15 stsp 				goto done;
303 894e4711 2022-10-15 stsp 			if (csum)
304 894e4711 2022-10-15 stsp 				csum_output(csum, zb.outbuf, avail);
305 894e4711 2022-10-15 stsp 			*outlen += avail;
306 894e4711 2022-10-15 stsp 		}
307 894e4711 2022-10-15 stsp 	} while (zb.flags & GOT_DEFLATE_F_HAVE_MORE);
308 894e4711 2022-10-15 stsp 
309 894e4711 2022-10-15 stsp done:
310 894e4711 2022-10-15 stsp 	got_deflate_end(&zb);
311 894e4711 2022-10-15 stsp 	return err;
312 2181e0c8 2019-03-19 stsp }
313 2181e0c8 2019-03-19 stsp 
314 2181e0c8 2019-03-19 stsp const struct got_error *
315 72840534 2022-01-19 stsp got_deflate_to_file(off_t *outlen, FILE *infile, off_t len,
316 72840534 2022-01-19 stsp     FILE *outfile, struct got_deflate_checksum *csum)
317 2181e0c8 2019-03-19 stsp {
318 2181e0c8 2019-03-19 stsp 	const struct got_error *err;
319 2181e0c8 2019-03-19 stsp 	size_t avail;
320 72840534 2022-01-19 stsp 	off_t consumed;
321 2181e0c8 2019-03-19 stsp 	struct got_deflate_buf zb;
322 2181e0c8 2019-03-19 stsp 
323 3b9e6fcf 2021-06-05 stsp 	err = got_deflate_init(&zb, NULL, GOT_DEFLATE_BUFSIZE);
324 2181e0c8 2019-03-19 stsp 	if (err)
325 2181e0c8 2019-03-19 stsp 		goto done;
326 2181e0c8 2019-03-19 stsp 
327 2181e0c8 2019-03-19 stsp 	*outlen = 0;
328 2181e0c8 2019-03-19 stsp 
329 2181e0c8 2019-03-19 stsp 	do {
330 72840534 2022-01-19 stsp 		err = got_deflate_read(&zb, infile, len, &avail, &consumed);
331 2181e0c8 2019-03-19 stsp 		if (err)
332 2181e0c8 2019-03-19 stsp 			goto done;
333 72840534 2022-01-19 stsp 		len -= consumed;
334 2181e0c8 2019-03-19 stsp 		if (avail > 0) {
335 2181e0c8 2019-03-19 stsp 			size_t n;
336 2181e0c8 2019-03-19 stsp 			n = fwrite(zb.outbuf, avail, 1, outfile);
337 2181e0c8 2019-03-19 stsp 			if (n != 1) {
338 2181e0c8 2019-03-19 stsp 				err = got_ferror(outfile, GOT_ERR_IO);
339 2181e0c8 2019-03-19 stsp 				goto done;
340 2181e0c8 2019-03-19 stsp 			}
341 3b9e6fcf 2021-06-05 stsp 			if (csum)
342 3b9e6fcf 2021-06-05 stsp 				csum_output(csum, zb.outbuf, avail);
343 2181e0c8 2019-03-19 stsp 			*outlen += avail;
344 2181e0c8 2019-03-19 stsp 		}
345 2181e0c8 2019-03-19 stsp 	} while (zb.flags & GOT_DEFLATE_F_HAVE_MORE);
346 2181e0c8 2019-03-19 stsp 
347 2181e0c8 2019-03-19 stsp done:
348 2181e0c8 2019-03-19 stsp 	got_deflate_end(&zb);
349 2181e0c8 2019-03-19 stsp 	return err;
350 2181e0c8 2019-03-19 stsp }
351 64a8571e 2022-01-07 stsp 
352 64a8571e 2022-01-07 stsp const struct got_error *
353 72840534 2022-01-19 stsp got_deflate_to_file_mmap(off_t *outlen, uint8_t *map, size_t offset,
354 64a8571e 2022-01-07 stsp     size_t len, FILE *outfile, struct got_deflate_checksum *csum)
355 64a8571e 2022-01-07 stsp {
356 64a8571e 2022-01-07 stsp 	const struct got_error *err;
357 64a8571e 2022-01-07 stsp 	size_t avail, consumed;
358 64a8571e 2022-01-07 stsp 	struct got_deflate_buf zb;
359 64a8571e 2022-01-07 stsp 
360 64a8571e 2022-01-07 stsp 	err = got_deflate_init(&zb, NULL, GOT_DEFLATE_BUFSIZE);
361 64a8571e 2022-01-07 stsp 	if (err)
362 64a8571e 2022-01-07 stsp 		goto done;
363 64a8571e 2022-01-07 stsp 
364 64a8571e 2022-01-07 stsp 	*outlen = 0;
365 64a8571e 2022-01-07 stsp 	do {
366 64a8571e 2022-01-07 stsp 		err = got_deflate_read_mmap(&zb, map, offset, len, &avail,
367 64a8571e 2022-01-07 stsp 		    &consumed);
368 64a8571e 2022-01-07 stsp 		if (err)
369 64a8571e 2022-01-07 stsp 			goto done;
370 64a8571e 2022-01-07 stsp 		offset += consumed;
371 64a8571e 2022-01-07 stsp 		len -= consumed;
372 64a8571e 2022-01-07 stsp 		if (avail > 0) {
373 64a8571e 2022-01-07 stsp 			size_t n;
374 64a8571e 2022-01-07 stsp 			n = fwrite(zb.outbuf, avail, 1, outfile);
375 64a8571e 2022-01-07 stsp 			if (n != 1) {
376 64a8571e 2022-01-07 stsp 				err = got_ferror(outfile, GOT_ERR_IO);
377 64a8571e 2022-01-07 stsp 				goto done;
378 64a8571e 2022-01-07 stsp 			}
379 64a8571e 2022-01-07 stsp 			if (csum)
380 64a8571e 2022-01-07 stsp 				csum_output(csum, zb.outbuf, avail);
381 64a8571e 2022-01-07 stsp 			*outlen += avail;
382 64a8571e 2022-01-07 stsp 		}
383 64a8571e 2022-01-07 stsp 	} while (zb.flags & GOT_DEFLATE_F_HAVE_MORE);
384 2d9e6abf 2022-05-04 stsp 
385 2d9e6abf 2022-05-04 stsp done:
386 2d9e6abf 2022-05-04 stsp 	got_deflate_end(&zb);
387 2d9e6abf 2022-05-04 stsp 	return err;
388 2d9e6abf 2022-05-04 stsp }
389 2d9e6abf 2022-05-04 stsp 
390 2d9e6abf 2022-05-04 stsp const struct got_error *
391 2d9e6abf 2022-05-04 stsp got_deflate_append_to_file_mmap(struct got_deflate_buf *zb, off_t *outlen,
392 2d9e6abf 2022-05-04 stsp     uint8_t *map, size_t offset, size_t len, FILE *outfile,
393 2d9e6abf 2022-05-04 stsp     struct got_deflate_checksum *csum)
394 2d9e6abf 2022-05-04 stsp {
395 2d9e6abf 2022-05-04 stsp 	const struct got_error *err;
396 2d9e6abf 2022-05-04 stsp 	size_t avail, consumed;
397 2d9e6abf 2022-05-04 stsp 
398 2d9e6abf 2022-05-04 stsp 	do {
399 2d9e6abf 2022-05-04 stsp 		err = deflate_read_mmap(zb, map, offset, len, &avail,
400 2d9e6abf 2022-05-04 stsp 		    &consumed, 0);
401 2d9e6abf 2022-05-04 stsp 		if (err)
402 2d9e6abf 2022-05-04 stsp 			break;
403 2d9e6abf 2022-05-04 stsp 		offset += consumed;
404 2d9e6abf 2022-05-04 stsp 		len -= consumed;
405 2d9e6abf 2022-05-04 stsp 		if (avail > 0) {
406 2d9e6abf 2022-05-04 stsp 			size_t n;
407 2d9e6abf 2022-05-04 stsp 			n = fwrite(zb->outbuf, avail, 1, outfile);
408 2d9e6abf 2022-05-04 stsp 			if (n != 1) {
409 2d9e6abf 2022-05-04 stsp 				err = got_ferror(outfile, GOT_ERR_IO);
410 2d9e6abf 2022-05-04 stsp 				break;
411 2d9e6abf 2022-05-04 stsp 			}
412 2d9e6abf 2022-05-04 stsp 			if (csum)
413 2d9e6abf 2022-05-04 stsp 				csum_output(csum, zb->outbuf, avail);
414 2d9e6abf 2022-05-04 stsp 			if (outlen)
415 2d9e6abf 2022-05-04 stsp 				*outlen += avail;
416 2d9e6abf 2022-05-04 stsp 		}
417 2d9e6abf 2022-05-04 stsp 	} while ((zb->flags & GOT_DEFLATE_F_HAVE_MORE) && len > 0);
418 64a8571e 2022-01-07 stsp 
419 2d9e6abf 2022-05-04 stsp 	return err;
420 2d9e6abf 2022-05-04 stsp }
421 2d9e6abf 2022-05-04 stsp 
422 2d9e6abf 2022-05-04 stsp const struct got_error *
423 2d9e6abf 2022-05-04 stsp got_deflate_to_mem_mmap(uint8_t **outbuf, size_t *outlen,
424 2d9e6abf 2022-05-04 stsp     size_t *consumed_total, struct got_deflate_checksum *csum, uint8_t *map,
425 2d9e6abf 2022-05-04 stsp     size_t offset, size_t len)
426 2d9e6abf 2022-05-04 stsp {
427 2d9e6abf 2022-05-04 stsp 	const struct got_error *err;
428 2d9e6abf 2022-05-04 stsp 	size_t avail, consumed;
429 2d9e6abf 2022-05-04 stsp 	struct got_deflate_buf zb;
430 2d9e6abf 2022-05-04 stsp 	void *newbuf;
431 2d9e6abf 2022-05-04 stsp 	size_t nbuf = 1;
432 2d9e6abf 2022-05-04 stsp 
433 2d9e6abf 2022-05-04 stsp 	if (outbuf) {
434 2d9e6abf 2022-05-04 stsp 		*outbuf = malloc(GOT_DEFLATE_BUFSIZE);
435 2d9e6abf 2022-05-04 stsp 		if (*outbuf == NULL)
436 2d9e6abf 2022-05-04 stsp 			return got_error_from_errno("malloc");
437 2d9e6abf 2022-05-04 stsp 		err = got_deflate_init(&zb, *outbuf, GOT_DEFLATE_BUFSIZE);
438 2d9e6abf 2022-05-04 stsp 		if (err) {
439 2d9e6abf 2022-05-04 stsp 			free(*outbuf);
440 2d9e6abf 2022-05-04 stsp 			*outbuf = NULL;
441 2d9e6abf 2022-05-04 stsp 			return err;
442 2d9e6abf 2022-05-04 stsp 		}
443 2d9e6abf 2022-05-04 stsp 	} else {
444 2d9e6abf 2022-05-04 stsp 		err = got_deflate_init(&zb, NULL, GOT_DEFLATE_BUFSIZE);
445 2d9e6abf 2022-05-04 stsp 		if (err)
446 2d9e6abf 2022-05-04 stsp 			return err;
447 2d9e6abf 2022-05-04 stsp 	}
448 2d9e6abf 2022-05-04 stsp 
449 2d9e6abf 2022-05-04 stsp 	*outlen = 0;
450 2d9e6abf 2022-05-04 stsp 	if (consumed_total)
451 2d9e6abf 2022-05-04 stsp 		*consumed_total = 0;
452 2d9e6abf 2022-05-04 stsp 	do {
453 2d9e6abf 2022-05-04 stsp 		err = got_deflate_read_mmap(&zb, map, offset, len, &avail,
454 2d9e6abf 2022-05-04 stsp 		    &consumed);
455 2d9e6abf 2022-05-04 stsp 		if (err)
456 2d9e6abf 2022-05-04 stsp 			goto done;
457 2d9e6abf 2022-05-04 stsp 		offset += consumed;
458 2d9e6abf 2022-05-04 stsp 		if (consumed_total)
459 2d9e6abf 2022-05-04 stsp 			*consumed_total += consumed;
460 2d9e6abf 2022-05-04 stsp 		len -= consumed;
461 2d9e6abf 2022-05-04 stsp 		if (avail > 0 && csum)
462 2d9e6abf 2022-05-04 stsp 			csum_output(csum, zb.outbuf, avail);
463 2d9e6abf 2022-05-04 stsp 		*outlen += avail;
464 2d9e6abf 2022-05-04 stsp 		if ((zb.flags & GOT_DEFLATE_F_HAVE_MORE) && outbuf != NULL) {
465 2d9e6abf 2022-05-04 stsp 			newbuf = reallocarray(*outbuf, ++nbuf,
466 2d9e6abf 2022-05-04 stsp 			    GOT_DEFLATE_BUFSIZE);
467 2d9e6abf 2022-05-04 stsp 			if (newbuf == NULL) {
468 2d9e6abf 2022-05-04 stsp 				err = got_error_from_errno("reallocarray");
469 2d9e6abf 2022-05-04 stsp 				free(*outbuf);
470 2d9e6abf 2022-05-04 stsp 				*outbuf = NULL;
471 2d9e6abf 2022-05-04 stsp 				*outlen = 0;
472 2d9e6abf 2022-05-04 stsp 				goto done;
473 2d9e6abf 2022-05-04 stsp 			}
474 2d9e6abf 2022-05-04 stsp 			*outbuf = newbuf;
475 2d9e6abf 2022-05-04 stsp 			zb.outbuf = newbuf + *outlen;
476 2d9e6abf 2022-05-04 stsp 			zb.outlen = (nbuf * GOT_DEFLATE_BUFSIZE) - *outlen;
477 2d9e6abf 2022-05-04 stsp 		}
478 2d9e6abf 2022-05-04 stsp 	} while (zb.flags & GOT_DEFLATE_F_HAVE_MORE);
479 64a8571e 2022-01-07 stsp done:
480 64a8571e 2022-01-07 stsp 	got_deflate_end(&zb);
481 64a8571e 2022-01-07 stsp 	return err;
482 64a8571e 2022-01-07 stsp }