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 68069cf6 2023-03-08 thomas #include "got_compat.h"
 18 68069cf6 2023-03-08 thomas 
 19 8b925c6c 2022-07-16 thomas #include <sys/queue.h>
 20 2181e0c8 2019-03-19 stsp 
 21 2181e0c8 2019-03-19 stsp #include <errno.h>
 22 2181e0c8 2019-03-19 stsp #include <stdio.h>
 23 2181e0c8 2019-03-19 stsp #include <stdlib.h>
 24 2181e0c8 2019-03-19 stsp #include <string.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 b16893ba 2023-02-24 thomas #include "got_lib_hash.h"
 34 3efd8e31 2022-10-23 thomas #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 87e39f6f 2023-09-05 thomas static const struct got_error *
 41 87e39f6f 2023-09-05 thomas wrap_deflate_error(int zerr, const char *prefix)
 42 87e39f6f 2023-09-05 thomas {
 43 87e39f6f 2023-09-05 thomas 	if  (zerr == Z_ERRNO)
 44 87e39f6f 2023-09-05 thomas 		return got_error_from_errno(prefix);
 45 87e39f6f 2023-09-05 thomas 	if  (zerr == Z_MEM_ERROR)
 46 87e39f6f 2023-09-05 thomas 		return got_error_set_errno(ENOMEM, prefix);
 47 87e39f6f 2023-09-05 thomas 
 48 87e39f6f 2023-09-05 thomas 	return got_error(GOT_ERR_COMPRESSION);
 49 87e39f6f 2023-09-05 thomas }
 50 87e39f6f 2023-09-05 thomas 
 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 0699dbc2 2022-11-08 thomas 	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 87e39f6f 2023-09-05 thomas 	if (zerr != Z_OK)
 63 87e39f6f 2023-09-05 thomas 		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 dbaa2362 2021-09-28 thomas 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 b16893ba 2023-02-24 thomas 	if (csum->output_ctx)
 96 b16893ba 2023-02-24 thomas 		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 e8f02263 2022-01-23 thomas got_deflate_read(struct got_deflate_buf *zb, FILE *f, off_t len,
101 e8f02263 2022-01-23 thomas     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 e8f02263 2022-01-23 thomas 	*consumed = 0;
112 2181e0c8 2019-03-19 stsp 	do {
113 e8f02263 2022-01-23 thomas 		size_t last_total_in = z->total_in;
114 2181e0c8 2019-03-19 stsp 		if (z->avail_in == 0) {
115 e8f02263 2022-01-23 thomas 			size_t n = 0;
116 e8f02263 2022-01-23 thomas 			if (*consumed < len) {
117 e8f02263 2022-01-23 thomas 				n = fread(zb->inbuf, 1,
118 e8f02263 2022-01-23 thomas 				    MIN(zb->inlen, len - *consumed), f);
119 e8f02263 2022-01-23 thomas 			}
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 e8f02263 2022-01-23 thomas 		*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 87e39f6f 2023-09-05 thomas 			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 9249e7e3 2022-05-12 thomas static const struct got_error *
147 9249e7e3 2022-05-12 thomas deflate_read_mmap(struct got_deflate_buf *zb, uint8_t *map, size_t offset,
148 9249e7e3 2022-05-12 thomas     size_t len, size_t *outlenp, size_t *consumed, int flush_on_eof)
149 2b0ae357 2022-01-10 thomas {
150 2b0ae357 2022-01-10 thomas 	z_stream *z = &zb->z;
151 2b0ae357 2022-01-10 thomas 	size_t last_total_out = z->total_out;
152 2b0ae357 2022-01-10 thomas 	int ret = Z_ERRNO;
153 2b0ae357 2022-01-10 thomas 
154 2b0ae357 2022-01-10 thomas 	z->next_out = zb->outbuf;
155 2b0ae357 2022-01-10 thomas 	z->avail_out = zb->outlen;
156 2b0ae357 2022-01-10 thomas 
157 2b0ae357 2022-01-10 thomas 	*outlenp = 0;
158 2b0ae357 2022-01-10 thomas 	*consumed = 0;
159 2b0ae357 2022-01-10 thomas 	do {
160 2b0ae357 2022-01-10 thomas 		size_t last_total_in = z->total_in;
161 2b0ae357 2022-01-10 thomas 		if (z->avail_in == 0) {
162 2b0ae357 2022-01-10 thomas 			z->next_in = map + offset + *consumed;
163 f6a55b40 2022-02-12 thomas 			if (len - *consumed > UINT_MAX)
164 f6a55b40 2022-02-12 thomas 				z->avail_in = UINT_MAX;
165 f6a55b40 2022-02-12 thomas 			else
166 f6a55b40 2022-02-12 thomas 				z->avail_in = len - *consumed;
167 2b0ae357 2022-01-10 thomas 			if (z->avail_in == 0) {
168 2b0ae357 2022-01-10 thomas 				/* EOF */
169 9249e7e3 2022-05-12 thomas 				if (flush_on_eof)
170 9249e7e3 2022-05-12 thomas 					ret = deflate(z, Z_FINISH);
171 2b0ae357 2022-01-10 thomas 				break;
172 2b0ae357 2022-01-10 thomas 			}
173 2b0ae357 2022-01-10 thomas 		}
174 2b0ae357 2022-01-10 thomas 		ret = deflate(z, Z_NO_FLUSH);
175 2b0ae357 2022-01-10 thomas 		*consumed += z->total_in - last_total_in;
176 2b0ae357 2022-01-10 thomas 	} while (ret == Z_OK && z->avail_out > 0);
177 2b0ae357 2022-01-10 thomas 
178 2b0ae357 2022-01-10 thomas 	if (ret == Z_OK) {
179 2b0ae357 2022-01-10 thomas 		zb->flags |= GOT_DEFLATE_F_HAVE_MORE;
180 2b0ae357 2022-01-10 thomas 	} else {
181 2b0ae357 2022-01-10 thomas 		if (ret != Z_STREAM_END)
182 87e39f6f 2023-09-05 thomas 			return wrap_deflate_error(ret, "deflate");
183 2b0ae357 2022-01-10 thomas 		zb->flags &= ~GOT_DEFLATE_F_HAVE_MORE;
184 2b0ae357 2022-01-10 thomas 	}
185 2b0ae357 2022-01-10 thomas 
186 2b0ae357 2022-01-10 thomas 	*outlenp = z->total_out - last_total_out;
187 9249e7e3 2022-05-12 thomas 	return NULL;
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_read_mmap(struct got_deflate_buf *zb, uint8_t *map, size_t offset,
192 9249e7e3 2022-05-12 thomas     size_t len, size_t *outlenp, size_t *consumed)
193 9249e7e3 2022-05-12 thomas {
194 9249e7e3 2022-05-12 thomas 	return deflate_read_mmap(zb, map, offset, len, outlenp, consumed, 1);
195 9249e7e3 2022-05-12 thomas }
196 9249e7e3 2022-05-12 thomas 
197 9249e7e3 2022-05-12 thomas const struct got_error *
198 9249e7e3 2022-05-12 thomas got_deflate_flush(struct got_deflate_buf *zb, FILE *outfile,
199 9249e7e3 2022-05-12 thomas     struct got_deflate_checksum *csum, off_t *outlenp)
200 9249e7e3 2022-05-12 thomas {
201 9249e7e3 2022-05-12 thomas 	int ret;
202 9249e7e3 2022-05-12 thomas 	size_t n;
203 9249e7e3 2022-05-12 thomas 	z_stream *z = &zb->z;
204 9249e7e3 2022-05-12 thomas 
205 9249e7e3 2022-05-12 thomas 	if (z->avail_in != 0)
206 9249e7e3 2022-05-12 thomas 		return got_error_msg(GOT_ERR_COMPRESSION,
207 9249e7e3 2022-05-12 thomas 		    "cannot flush zb with pending input data");
208 9249e7e3 2022-05-12 thomas 
209 9249e7e3 2022-05-12 thomas 	do {
210 9249e7e3 2022-05-12 thomas 		size_t avail, last_total_out = zb->z.total_out;
211 9249e7e3 2022-05-12 thomas 
212 9249e7e3 2022-05-12 thomas 		z->next_out = zb->outbuf;
213 9249e7e3 2022-05-12 thomas 		z->avail_out = zb->outlen;
214 9249e7e3 2022-05-12 thomas 
215 9249e7e3 2022-05-12 thomas 		ret = deflate(z, Z_FINISH);
216 9249e7e3 2022-05-12 thomas 		if (ret != Z_STREAM_END && ret != Z_OK)
217 87e39f6f 2023-09-05 thomas 			return wrap_deflate_error(ret, "deflate");
218 9249e7e3 2022-05-12 thomas 
219 9249e7e3 2022-05-12 thomas 		avail = z->total_out - last_total_out;
220 9249e7e3 2022-05-12 thomas 		if (avail > 0) {
221 9249e7e3 2022-05-12 thomas 			n = fwrite(zb->outbuf, avail, 1, outfile);
222 9249e7e3 2022-05-12 thomas 			if (n != 1)
223 9249e7e3 2022-05-12 thomas 				return got_ferror(outfile, GOT_ERR_IO);
224 9249e7e3 2022-05-12 thomas 			if (csum)
225 9249e7e3 2022-05-12 thomas 				csum_output(csum, zb->outbuf, avail);
226 9249e7e3 2022-05-12 thomas 			if (outlenp)
227 9249e7e3 2022-05-12 thomas 				*outlenp += avail;
228 9249e7e3 2022-05-12 thomas 		}
229 9249e7e3 2022-05-12 thomas 	} while (ret != Z_STREAM_END);
230 9249e7e3 2022-05-12 thomas 
231 9249e7e3 2022-05-12 thomas 	zb->flags &= ~GOT_DEFLATE_F_HAVE_MORE;
232 2b0ae357 2022-01-10 thomas 	return NULL;
233 2b0ae357 2022-01-10 thomas }
234 2b0ae357 2022-01-10 thomas 
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 20a7d452 2022-10-16 thomas }
243 20a7d452 2022-10-16 thomas 
244 20a7d452 2022-10-16 thomas const struct got_error *
245 20a7d452 2022-10-16 thomas got_deflate_to_fd(off_t *outlen, FILE *infile, off_t len, int outfd,
246 20a7d452 2022-10-16 thomas     struct got_deflate_checksum *csum)
247 20a7d452 2022-10-16 thomas {
248 20a7d452 2022-10-16 thomas 	const struct got_error *err;
249 20a7d452 2022-10-16 thomas 	size_t avail;
250 20a7d452 2022-10-16 thomas 	off_t consumed;
251 20a7d452 2022-10-16 thomas 	struct got_deflate_buf zb;
252 20a7d452 2022-10-16 thomas 
253 20a7d452 2022-10-16 thomas 	err = got_deflate_init(&zb, NULL, GOT_DEFLATE_BUFSIZE);
254 20a7d452 2022-10-16 thomas 	if (err)
255 20a7d452 2022-10-16 thomas 		goto done;
256 20a7d452 2022-10-16 thomas 
257 20a7d452 2022-10-16 thomas 	*outlen = 0;
258 20a7d452 2022-10-16 thomas 
259 20a7d452 2022-10-16 thomas 	do {
260 20a7d452 2022-10-16 thomas 		err = got_deflate_read(&zb, infile, len, &avail, &consumed);
261 20a7d452 2022-10-16 thomas 		if (err)
262 20a7d452 2022-10-16 thomas 			goto done;
263 20a7d452 2022-10-16 thomas 		len -= consumed;
264 20a7d452 2022-10-16 thomas 		if (avail > 0) {
265 3efd8e31 2022-10-23 thomas 			err = got_poll_write_full(outfd, zb.outbuf, avail);
266 3efd8e31 2022-10-23 thomas 			if (err)
267 20a7d452 2022-10-16 thomas 				goto done;
268 20a7d452 2022-10-16 thomas 			if (csum)
269 20a7d452 2022-10-16 thomas 				csum_output(csum, zb.outbuf, avail);
270 20a7d452 2022-10-16 thomas 			*outlen += avail;
271 20a7d452 2022-10-16 thomas 		}
272 20a7d452 2022-10-16 thomas 	} while (zb.flags & GOT_DEFLATE_F_HAVE_MORE);
273 20a7d452 2022-10-16 thomas 
274 20a7d452 2022-10-16 thomas done:
275 20a7d452 2022-10-16 thomas 	got_deflate_end(&zb);
276 20a7d452 2022-10-16 thomas 	return err;
277 20a7d452 2022-10-16 thomas }
278 20a7d452 2022-10-16 thomas 
279 20a7d452 2022-10-16 thomas const struct got_error *
280 20a7d452 2022-10-16 thomas got_deflate_to_fd_mmap(off_t *outlen, uint8_t *map, size_t offset,
281 20a7d452 2022-10-16 thomas     size_t len, int outfd, struct got_deflate_checksum *csum)
282 20a7d452 2022-10-16 thomas {
283 20a7d452 2022-10-16 thomas 	const struct got_error *err;
284 20a7d452 2022-10-16 thomas 	size_t avail, consumed;
285 20a7d452 2022-10-16 thomas 	struct got_deflate_buf zb;
286 20a7d452 2022-10-16 thomas 
287 20a7d452 2022-10-16 thomas 	err = got_deflate_init(&zb, NULL, GOT_DEFLATE_BUFSIZE);
288 20a7d452 2022-10-16 thomas 	if (err)
289 20a7d452 2022-10-16 thomas 		goto done;
290 20a7d452 2022-10-16 thomas 
291 20a7d452 2022-10-16 thomas 	*outlen = 0;
292 20a7d452 2022-10-16 thomas 	do {
293 20a7d452 2022-10-16 thomas 		err = got_deflate_read_mmap(&zb, map, offset, len, &avail,
294 20a7d452 2022-10-16 thomas 		    &consumed);
295 20a7d452 2022-10-16 thomas 		if (err)
296 20a7d452 2022-10-16 thomas 			goto done;
297 20a7d452 2022-10-16 thomas 		offset += consumed;
298 20a7d452 2022-10-16 thomas 		len -= consumed;
299 20a7d452 2022-10-16 thomas 		if (avail > 0) {
300 3efd8e31 2022-10-23 thomas 			err = got_poll_write_full(outfd, zb.outbuf, avail);
301 3efd8e31 2022-10-23 thomas 			if (err)
302 20a7d452 2022-10-16 thomas 				goto done;
303 20a7d452 2022-10-16 thomas 			if (csum)
304 20a7d452 2022-10-16 thomas 				csum_output(csum, zb.outbuf, avail);
305 20a7d452 2022-10-16 thomas 			*outlen += avail;
306 20a7d452 2022-10-16 thomas 		}
307 20a7d452 2022-10-16 thomas 	} while (zb.flags & GOT_DEFLATE_F_HAVE_MORE);
308 20a7d452 2022-10-16 thomas 
309 20a7d452 2022-10-16 thomas done:
310 20a7d452 2022-10-16 thomas 	got_deflate_end(&zb);
311 20a7d452 2022-10-16 thomas 	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 e8f02263 2022-01-23 thomas got_deflate_to_file(off_t *outlen, FILE *infile, off_t len,
316 e8f02263 2022-01-23 thomas     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 e8f02263 2022-01-23 thomas 	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 e8f02263 2022-01-23 thomas 		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 e8f02263 2022-01-23 thomas 		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 2b0ae357 2022-01-10 thomas 
352 2b0ae357 2022-01-10 thomas const struct got_error *
353 e8f02263 2022-01-23 thomas got_deflate_to_file_mmap(off_t *outlen, uint8_t *map, size_t offset,
354 2b0ae357 2022-01-10 thomas     size_t len, FILE *outfile, struct got_deflate_checksum *csum)
355 2b0ae357 2022-01-10 thomas {
356 2b0ae357 2022-01-10 thomas 	const struct got_error *err;
357 2b0ae357 2022-01-10 thomas 	size_t avail, consumed;
358 2b0ae357 2022-01-10 thomas 	struct got_deflate_buf zb;
359 2b0ae357 2022-01-10 thomas 
360 2b0ae357 2022-01-10 thomas 	err = got_deflate_init(&zb, NULL, GOT_DEFLATE_BUFSIZE);
361 2b0ae357 2022-01-10 thomas 	if (err)
362 2b0ae357 2022-01-10 thomas 		goto done;
363 2b0ae357 2022-01-10 thomas 
364 2b0ae357 2022-01-10 thomas 	*outlen = 0;
365 2b0ae357 2022-01-10 thomas 	do {
366 2b0ae357 2022-01-10 thomas 		err = got_deflate_read_mmap(&zb, map, offset, len, &avail,
367 2b0ae357 2022-01-10 thomas 		    &consumed);
368 2b0ae357 2022-01-10 thomas 		if (err)
369 2b0ae357 2022-01-10 thomas 			goto done;
370 2b0ae357 2022-01-10 thomas 		offset += consumed;
371 2b0ae357 2022-01-10 thomas 		len -= consumed;
372 2b0ae357 2022-01-10 thomas 		if (avail > 0) {
373 2b0ae357 2022-01-10 thomas 			size_t n;
374 2b0ae357 2022-01-10 thomas 			n = fwrite(zb.outbuf, avail, 1, outfile);
375 2b0ae357 2022-01-10 thomas 			if (n != 1) {
376 2b0ae357 2022-01-10 thomas 				err = got_ferror(outfile, GOT_ERR_IO);
377 2b0ae357 2022-01-10 thomas 				goto done;
378 2b0ae357 2022-01-10 thomas 			}
379 2b0ae357 2022-01-10 thomas 			if (csum)
380 2b0ae357 2022-01-10 thomas 				csum_output(csum, zb.outbuf, avail);
381 2b0ae357 2022-01-10 thomas 			*outlen += avail;
382 2b0ae357 2022-01-10 thomas 		}
383 2b0ae357 2022-01-10 thomas 	} while (zb.flags & GOT_DEFLATE_F_HAVE_MORE);
384 9249e7e3 2022-05-12 thomas 
385 9249e7e3 2022-05-12 thomas done:
386 9249e7e3 2022-05-12 thomas 	got_deflate_end(&zb);
387 9249e7e3 2022-05-12 thomas 	return err;
388 9249e7e3 2022-05-12 thomas }
389 9249e7e3 2022-05-12 thomas 
390 9249e7e3 2022-05-12 thomas const struct got_error *
391 9249e7e3 2022-05-12 thomas got_deflate_append_to_file_mmap(struct got_deflate_buf *zb, off_t *outlen,
392 9249e7e3 2022-05-12 thomas     uint8_t *map, size_t offset, size_t len, FILE *outfile,
393 9249e7e3 2022-05-12 thomas     struct got_deflate_checksum *csum)
394 9249e7e3 2022-05-12 thomas {
395 9249e7e3 2022-05-12 thomas 	const struct got_error *err;
396 9249e7e3 2022-05-12 thomas 	size_t avail, consumed;
397 9249e7e3 2022-05-12 thomas 
398 9249e7e3 2022-05-12 thomas 	do {
399 9249e7e3 2022-05-12 thomas 		err = deflate_read_mmap(zb, map, offset, len, &avail,
400 9249e7e3 2022-05-12 thomas 		    &consumed, 0);
401 9249e7e3 2022-05-12 thomas 		if (err)
402 9249e7e3 2022-05-12 thomas 			break;
403 9249e7e3 2022-05-12 thomas 		offset += consumed;
404 9249e7e3 2022-05-12 thomas 		len -= consumed;
405 9249e7e3 2022-05-12 thomas 		if (avail > 0) {
406 9249e7e3 2022-05-12 thomas 			size_t n;
407 9249e7e3 2022-05-12 thomas 			n = fwrite(zb->outbuf, avail, 1, outfile);
408 9249e7e3 2022-05-12 thomas 			if (n != 1) {
409 9249e7e3 2022-05-12 thomas 				err = got_ferror(outfile, GOT_ERR_IO);
410 9249e7e3 2022-05-12 thomas 				break;
411 9249e7e3 2022-05-12 thomas 			}
412 9249e7e3 2022-05-12 thomas 			if (csum)
413 9249e7e3 2022-05-12 thomas 				csum_output(csum, zb->outbuf, avail);
414 9249e7e3 2022-05-12 thomas 			if (outlen)
415 9249e7e3 2022-05-12 thomas 				*outlen += avail;
416 9249e7e3 2022-05-12 thomas 		}
417 9249e7e3 2022-05-12 thomas 	} while ((zb->flags & GOT_DEFLATE_F_HAVE_MORE) && len > 0);
418 2b0ae357 2022-01-10 thomas 
419 9249e7e3 2022-05-12 thomas 	return err;
420 9249e7e3 2022-05-12 thomas }
421 9249e7e3 2022-05-12 thomas 
422 9249e7e3 2022-05-12 thomas const struct got_error *
423 9249e7e3 2022-05-12 thomas got_deflate_to_mem_mmap(uint8_t **outbuf, size_t *outlen,
424 9249e7e3 2022-05-12 thomas     size_t *consumed_total, struct got_deflate_checksum *csum, uint8_t *map,
425 9249e7e3 2022-05-12 thomas     size_t offset, size_t len)
426 9249e7e3 2022-05-12 thomas {
427 9249e7e3 2022-05-12 thomas 	const struct got_error *err;
428 9249e7e3 2022-05-12 thomas 	size_t avail, consumed;
429 9249e7e3 2022-05-12 thomas 	struct got_deflate_buf zb;
430 9249e7e3 2022-05-12 thomas 	void *newbuf;
431 9249e7e3 2022-05-12 thomas 	size_t nbuf = 1;
432 9249e7e3 2022-05-12 thomas 
433 9249e7e3 2022-05-12 thomas 	if (outbuf) {
434 9249e7e3 2022-05-12 thomas 		*outbuf = malloc(GOT_DEFLATE_BUFSIZE);
435 9249e7e3 2022-05-12 thomas 		if (*outbuf == NULL)
436 9249e7e3 2022-05-12 thomas 			return got_error_from_errno("malloc");
437 9249e7e3 2022-05-12 thomas 		err = got_deflate_init(&zb, *outbuf, GOT_DEFLATE_BUFSIZE);
438 9249e7e3 2022-05-12 thomas 		if (err) {
439 9249e7e3 2022-05-12 thomas 			free(*outbuf);
440 9249e7e3 2022-05-12 thomas 			*outbuf = NULL;
441 9249e7e3 2022-05-12 thomas 			return err;
442 9249e7e3 2022-05-12 thomas 		}
443 9249e7e3 2022-05-12 thomas 	} else {
444 9249e7e3 2022-05-12 thomas 		err = got_deflate_init(&zb, NULL, GOT_DEFLATE_BUFSIZE);
445 9249e7e3 2022-05-12 thomas 		if (err)
446 9249e7e3 2022-05-12 thomas 			return err;
447 9249e7e3 2022-05-12 thomas 	}
448 9249e7e3 2022-05-12 thomas 
449 9249e7e3 2022-05-12 thomas 	*outlen = 0;
450 9249e7e3 2022-05-12 thomas 	if (consumed_total)
451 9249e7e3 2022-05-12 thomas 		*consumed_total = 0;
452 9249e7e3 2022-05-12 thomas 	do {
453 9249e7e3 2022-05-12 thomas 		err = got_deflate_read_mmap(&zb, map, offset, len, &avail,
454 9249e7e3 2022-05-12 thomas 		    &consumed);
455 9249e7e3 2022-05-12 thomas 		if (err)
456 9249e7e3 2022-05-12 thomas 			goto done;
457 9249e7e3 2022-05-12 thomas 		offset += consumed;
458 9249e7e3 2022-05-12 thomas 		if (consumed_total)
459 9249e7e3 2022-05-12 thomas 			*consumed_total += consumed;
460 9249e7e3 2022-05-12 thomas 		len -= consumed;
461 9249e7e3 2022-05-12 thomas 		if (avail > 0 && csum)
462 9249e7e3 2022-05-12 thomas 			csum_output(csum, zb.outbuf, avail);
463 9249e7e3 2022-05-12 thomas 		*outlen += avail;
464 9249e7e3 2022-05-12 thomas 		if ((zb.flags & GOT_DEFLATE_F_HAVE_MORE) && outbuf != NULL) {
465 9249e7e3 2022-05-12 thomas 			newbuf = reallocarray(*outbuf, ++nbuf,
466 9249e7e3 2022-05-12 thomas 			    GOT_DEFLATE_BUFSIZE);
467 9249e7e3 2022-05-12 thomas 			if (newbuf == NULL) {
468 9249e7e3 2022-05-12 thomas 				err = got_error_from_errno("reallocarray");
469 9249e7e3 2022-05-12 thomas 				free(*outbuf);
470 9249e7e3 2022-05-12 thomas 				*outbuf = NULL;
471 9249e7e3 2022-05-12 thomas 				*outlen = 0;
472 9249e7e3 2022-05-12 thomas 				goto done;
473 9249e7e3 2022-05-12 thomas 			}
474 9249e7e3 2022-05-12 thomas 			*outbuf = newbuf;
475 9249e7e3 2022-05-12 thomas 			zb.outbuf = newbuf + *outlen;
476 9249e7e3 2022-05-12 thomas 			zb.outlen = (nbuf * GOT_DEFLATE_BUFSIZE) - *outlen;
477 9249e7e3 2022-05-12 thomas 		}
478 9249e7e3 2022-05-12 thomas 	} while (zb.flags & GOT_DEFLATE_F_HAVE_MORE);
479 2b0ae357 2022-01-10 thomas done:
480 2b0ae357 2022-01-10 thomas 	got_deflate_end(&zb);
481 2b0ae357 2022-01-10 thomas 	return err;
482 2b0ae357 2022-01-10 thomas }