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 2181e0c8 2019-03-19 stsp }
236 2181e0c8 2019-03-19 stsp 
237 2181e0c8 2019-03-19 stsp const struct got_error *
238 72840534 2022-01-19 stsp got_deflate_to_file(off_t *outlen, FILE *infile, off_t len,
239 72840534 2022-01-19 stsp     FILE *outfile, struct got_deflate_checksum *csum)
240 2181e0c8 2019-03-19 stsp {
241 2181e0c8 2019-03-19 stsp 	const struct got_error *err;
242 2181e0c8 2019-03-19 stsp 	size_t avail;
243 72840534 2022-01-19 stsp 	off_t consumed;
244 2181e0c8 2019-03-19 stsp 	struct got_deflate_buf zb;
245 2181e0c8 2019-03-19 stsp 
246 3b9e6fcf 2021-06-05 stsp 	err = got_deflate_init(&zb, NULL, GOT_DEFLATE_BUFSIZE);
247 2181e0c8 2019-03-19 stsp 	if (err)
248 2181e0c8 2019-03-19 stsp 		goto done;
249 2181e0c8 2019-03-19 stsp 
250 2181e0c8 2019-03-19 stsp 	*outlen = 0;
251 2181e0c8 2019-03-19 stsp 
252 2181e0c8 2019-03-19 stsp 	do {
253 72840534 2022-01-19 stsp 		err = got_deflate_read(&zb, infile, len, &avail, &consumed);
254 2181e0c8 2019-03-19 stsp 		if (err)
255 2181e0c8 2019-03-19 stsp 			goto done;
256 72840534 2022-01-19 stsp 		len -= consumed;
257 2181e0c8 2019-03-19 stsp 		if (avail > 0) {
258 2181e0c8 2019-03-19 stsp 			size_t n;
259 2181e0c8 2019-03-19 stsp 			n = fwrite(zb.outbuf, avail, 1, outfile);
260 2181e0c8 2019-03-19 stsp 			if (n != 1) {
261 2181e0c8 2019-03-19 stsp 				err = got_ferror(outfile, GOT_ERR_IO);
262 2181e0c8 2019-03-19 stsp 				goto done;
263 2181e0c8 2019-03-19 stsp 			}
264 3b9e6fcf 2021-06-05 stsp 			if (csum)
265 3b9e6fcf 2021-06-05 stsp 				csum_output(csum, zb.outbuf, avail);
266 2181e0c8 2019-03-19 stsp 			*outlen += avail;
267 2181e0c8 2019-03-19 stsp 		}
268 2181e0c8 2019-03-19 stsp 	} while (zb.flags & GOT_DEFLATE_F_HAVE_MORE);
269 2181e0c8 2019-03-19 stsp 
270 2181e0c8 2019-03-19 stsp done:
271 2181e0c8 2019-03-19 stsp 	got_deflate_end(&zb);
272 2181e0c8 2019-03-19 stsp 	return err;
273 2181e0c8 2019-03-19 stsp }
274 64a8571e 2022-01-07 stsp 
275 64a8571e 2022-01-07 stsp const struct got_error *
276 72840534 2022-01-19 stsp got_deflate_to_file_mmap(off_t *outlen, uint8_t *map, size_t offset,
277 64a8571e 2022-01-07 stsp     size_t len, FILE *outfile, struct got_deflate_checksum *csum)
278 64a8571e 2022-01-07 stsp {
279 64a8571e 2022-01-07 stsp 	const struct got_error *err;
280 64a8571e 2022-01-07 stsp 	size_t avail, consumed;
281 64a8571e 2022-01-07 stsp 	struct got_deflate_buf zb;
282 64a8571e 2022-01-07 stsp 
283 64a8571e 2022-01-07 stsp 	err = got_deflate_init(&zb, NULL, GOT_DEFLATE_BUFSIZE);
284 64a8571e 2022-01-07 stsp 	if (err)
285 64a8571e 2022-01-07 stsp 		goto done;
286 64a8571e 2022-01-07 stsp 
287 64a8571e 2022-01-07 stsp 	*outlen = 0;
288 64a8571e 2022-01-07 stsp 	do {
289 64a8571e 2022-01-07 stsp 		err = got_deflate_read_mmap(&zb, map, offset, len, &avail,
290 64a8571e 2022-01-07 stsp 		    &consumed);
291 64a8571e 2022-01-07 stsp 		if (err)
292 64a8571e 2022-01-07 stsp 			goto done;
293 64a8571e 2022-01-07 stsp 		offset += consumed;
294 64a8571e 2022-01-07 stsp 		len -= consumed;
295 64a8571e 2022-01-07 stsp 		if (avail > 0) {
296 64a8571e 2022-01-07 stsp 			size_t n;
297 64a8571e 2022-01-07 stsp 			n = fwrite(zb.outbuf, avail, 1, outfile);
298 64a8571e 2022-01-07 stsp 			if (n != 1) {
299 64a8571e 2022-01-07 stsp 				err = got_ferror(outfile, GOT_ERR_IO);
300 64a8571e 2022-01-07 stsp 				goto done;
301 64a8571e 2022-01-07 stsp 			}
302 64a8571e 2022-01-07 stsp 			if (csum)
303 64a8571e 2022-01-07 stsp 				csum_output(csum, zb.outbuf, avail);
304 64a8571e 2022-01-07 stsp 			*outlen += avail;
305 64a8571e 2022-01-07 stsp 		}
306 64a8571e 2022-01-07 stsp 	} while (zb.flags & GOT_DEFLATE_F_HAVE_MORE);
307 2d9e6abf 2022-05-04 stsp 
308 2d9e6abf 2022-05-04 stsp done:
309 2d9e6abf 2022-05-04 stsp 	got_deflate_end(&zb);
310 2d9e6abf 2022-05-04 stsp 	return err;
311 2d9e6abf 2022-05-04 stsp }
312 2d9e6abf 2022-05-04 stsp 
313 2d9e6abf 2022-05-04 stsp const struct got_error *
314 2d9e6abf 2022-05-04 stsp got_deflate_append_to_file_mmap(struct got_deflate_buf *zb, off_t *outlen,
315 2d9e6abf 2022-05-04 stsp     uint8_t *map, size_t offset, size_t len, FILE *outfile,
316 2d9e6abf 2022-05-04 stsp     struct got_deflate_checksum *csum)
317 2d9e6abf 2022-05-04 stsp {
318 2d9e6abf 2022-05-04 stsp 	const struct got_error *err;
319 2d9e6abf 2022-05-04 stsp 	size_t avail, consumed;
320 2d9e6abf 2022-05-04 stsp 
321 2d9e6abf 2022-05-04 stsp 	do {
322 2d9e6abf 2022-05-04 stsp 		err = deflate_read_mmap(zb, map, offset, len, &avail,
323 2d9e6abf 2022-05-04 stsp 		    &consumed, 0);
324 2d9e6abf 2022-05-04 stsp 		if (err)
325 2d9e6abf 2022-05-04 stsp 			break;
326 2d9e6abf 2022-05-04 stsp 		offset += consumed;
327 2d9e6abf 2022-05-04 stsp 		len -= consumed;
328 2d9e6abf 2022-05-04 stsp 		if (avail > 0) {
329 2d9e6abf 2022-05-04 stsp 			size_t n;
330 2d9e6abf 2022-05-04 stsp 			n = fwrite(zb->outbuf, avail, 1, outfile);
331 2d9e6abf 2022-05-04 stsp 			if (n != 1) {
332 2d9e6abf 2022-05-04 stsp 				err = got_ferror(outfile, GOT_ERR_IO);
333 2d9e6abf 2022-05-04 stsp 				break;
334 2d9e6abf 2022-05-04 stsp 			}
335 2d9e6abf 2022-05-04 stsp 			if (csum)
336 2d9e6abf 2022-05-04 stsp 				csum_output(csum, zb->outbuf, avail);
337 2d9e6abf 2022-05-04 stsp 			if (outlen)
338 2d9e6abf 2022-05-04 stsp 				*outlen += avail;
339 2d9e6abf 2022-05-04 stsp 		}
340 2d9e6abf 2022-05-04 stsp 	} while ((zb->flags & GOT_DEFLATE_F_HAVE_MORE) && len > 0);
341 64a8571e 2022-01-07 stsp 
342 2d9e6abf 2022-05-04 stsp 	return err;
343 2d9e6abf 2022-05-04 stsp }
344 2d9e6abf 2022-05-04 stsp 
345 2d9e6abf 2022-05-04 stsp const struct got_error *
346 2d9e6abf 2022-05-04 stsp got_deflate_to_mem_mmap(uint8_t **outbuf, size_t *outlen,
347 2d9e6abf 2022-05-04 stsp     size_t *consumed_total, struct got_deflate_checksum *csum, uint8_t *map,
348 2d9e6abf 2022-05-04 stsp     size_t offset, size_t len)
349 2d9e6abf 2022-05-04 stsp {
350 2d9e6abf 2022-05-04 stsp 	const struct got_error *err;
351 2d9e6abf 2022-05-04 stsp 	size_t avail, consumed;
352 2d9e6abf 2022-05-04 stsp 	struct got_deflate_buf zb;
353 2d9e6abf 2022-05-04 stsp 	void *newbuf;
354 2d9e6abf 2022-05-04 stsp 	size_t nbuf = 1;
355 2d9e6abf 2022-05-04 stsp 
356 2d9e6abf 2022-05-04 stsp 	if (outbuf) {
357 2d9e6abf 2022-05-04 stsp 		*outbuf = malloc(GOT_DEFLATE_BUFSIZE);
358 2d9e6abf 2022-05-04 stsp 		if (*outbuf == NULL)
359 2d9e6abf 2022-05-04 stsp 			return got_error_from_errno("malloc");
360 2d9e6abf 2022-05-04 stsp 		err = got_deflate_init(&zb, *outbuf, GOT_DEFLATE_BUFSIZE);
361 2d9e6abf 2022-05-04 stsp 		if (err) {
362 2d9e6abf 2022-05-04 stsp 			free(*outbuf);
363 2d9e6abf 2022-05-04 stsp 			*outbuf = NULL;
364 2d9e6abf 2022-05-04 stsp 			return err;
365 2d9e6abf 2022-05-04 stsp 		}
366 2d9e6abf 2022-05-04 stsp 	} else {
367 2d9e6abf 2022-05-04 stsp 		err = got_deflate_init(&zb, NULL, GOT_DEFLATE_BUFSIZE);
368 2d9e6abf 2022-05-04 stsp 		if (err)
369 2d9e6abf 2022-05-04 stsp 			return err;
370 2d9e6abf 2022-05-04 stsp 	}
371 2d9e6abf 2022-05-04 stsp 
372 2d9e6abf 2022-05-04 stsp 	*outlen = 0;
373 2d9e6abf 2022-05-04 stsp 	if (consumed_total)
374 2d9e6abf 2022-05-04 stsp 		*consumed_total = 0;
375 2d9e6abf 2022-05-04 stsp 	do {
376 2d9e6abf 2022-05-04 stsp 		err = got_deflate_read_mmap(&zb, map, offset, len, &avail,
377 2d9e6abf 2022-05-04 stsp 		    &consumed);
378 2d9e6abf 2022-05-04 stsp 		if (err)
379 2d9e6abf 2022-05-04 stsp 			goto done;
380 2d9e6abf 2022-05-04 stsp 		offset += consumed;
381 2d9e6abf 2022-05-04 stsp 		if (consumed_total)
382 2d9e6abf 2022-05-04 stsp 			*consumed_total += consumed;
383 2d9e6abf 2022-05-04 stsp 		len -= consumed;
384 2d9e6abf 2022-05-04 stsp 		if (avail > 0 && csum)
385 2d9e6abf 2022-05-04 stsp 			csum_output(csum, zb.outbuf, avail);
386 2d9e6abf 2022-05-04 stsp 		*outlen += avail;
387 2d9e6abf 2022-05-04 stsp 		if ((zb.flags & GOT_DEFLATE_F_HAVE_MORE) && outbuf != NULL) {
388 2d9e6abf 2022-05-04 stsp 			newbuf = reallocarray(*outbuf, ++nbuf,
389 2d9e6abf 2022-05-04 stsp 			    GOT_DEFLATE_BUFSIZE);
390 2d9e6abf 2022-05-04 stsp 			if (newbuf == NULL) {
391 2d9e6abf 2022-05-04 stsp 				err = got_error_from_errno("reallocarray");
392 2d9e6abf 2022-05-04 stsp 				free(*outbuf);
393 2d9e6abf 2022-05-04 stsp 				*outbuf = NULL;
394 2d9e6abf 2022-05-04 stsp 				*outlen = 0;
395 2d9e6abf 2022-05-04 stsp 				goto done;
396 2d9e6abf 2022-05-04 stsp 			}
397 2d9e6abf 2022-05-04 stsp 			*outbuf = newbuf;
398 2d9e6abf 2022-05-04 stsp 			zb.outbuf = newbuf + *outlen;
399 2d9e6abf 2022-05-04 stsp 			zb.outlen = (nbuf * GOT_DEFLATE_BUFSIZE) - *outlen;
400 2d9e6abf 2022-05-04 stsp 		}
401 2d9e6abf 2022-05-04 stsp 	} while (zb.flags & GOT_DEFLATE_F_HAVE_MORE);
402 64a8571e 2022-01-07 stsp done:
403 64a8571e 2022-01-07 stsp 	got_deflate_end(&zb);
404 64a8571e 2022-01-07 stsp 	return err;
405 64a8571e 2022-01-07 stsp }