1 d71d75ad 2017-11-05 stsp /*
  2 a1fd68d8 2018-01-12 stsp  * Copyright (c) 2018 Stefan Sperling <stsp@openbsd.org>
  3 d71d75ad 2017-11-05 stsp  *
  4 d71d75ad 2017-11-05 stsp  * Permission to use, copy, modify, and distribute this software for any
  5 d71d75ad 2017-11-05 stsp  * purpose with or without fee is hereby granted, provided that the above
  6 d71d75ad 2017-11-05 stsp  * copyright notice and this permission notice appear in all copies.
  7 d71d75ad 2017-11-05 stsp  *
  8 d71d75ad 2017-11-05 stsp  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  9 d71d75ad 2017-11-05 stsp  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 10 d71d75ad 2017-11-05 stsp  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 11 d71d75ad 2017-11-05 stsp  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 12 d71d75ad 2017-11-05 stsp  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 13 d71d75ad 2017-11-05 stsp  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 14 d71d75ad 2017-11-05 stsp  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 15 d71d75ad 2017-11-05 stsp  */
 16 d71d75ad 2017-11-05 stsp 
 17 0ffeb3c2 2017-11-26 stsp #include <sys/stat.h>
 18 d1cda826 2017-11-06 stsp #include <sys/queue.h>
 19 d1cda826 2017-11-06 stsp 
 20 a1fd68d8 2018-01-12 stsp #include <errno.h>
 21 d71d75ad 2017-11-05 stsp #include <stdio.h>
 22 ab9a70b2 2017-11-06 stsp #include <stdlib.h>
 23 ab9a70b2 2017-11-06 stsp #include <string.h>
 24 d71d75ad 2017-11-05 stsp #include <sha1.h>
 25 ab9a70b2 2017-11-06 stsp #include <zlib.h>
 26 ab9a70b2 2017-11-06 stsp #include <ctype.h>
 27 ab9a70b2 2017-11-06 stsp #include <limits.h>
 28 d71d75ad 2017-11-05 stsp 
 29 ab9a70b2 2017-11-06 stsp #include "got_error.h"
 30 d71d75ad 2017-11-05 stsp #include "got_object.h"
 31 ab9a70b2 2017-11-06 stsp #include "got_repository.h"
 32 d1cda826 2017-11-06 stsp #include "got_sha1.h"
 33 a1fd68d8 2018-01-12 stsp #include "pack.h"
 34 d71d75ad 2017-11-05 stsp 
 35 ab9a70b2 2017-11-06 stsp #ifndef MIN
 36 ab9a70b2 2017-11-06 stsp #define	MIN(_a,_b) ((_a) < (_b) ? (_a) : (_b))
 37 ab9a70b2 2017-11-06 stsp #endif
 38 ab9a70b2 2017-11-06 stsp 
 39 ab9a70b2 2017-11-06 stsp #ifndef nitems
 40 ab9a70b2 2017-11-06 stsp #define nitems(_a) (sizeof(_a) / sizeof((_a)[0]))
 41 ab9a70b2 2017-11-06 stsp #endif
 42 ab9a70b2 2017-11-06 stsp 
 43 ab9a70b2 2017-11-06 stsp #define GOT_OBJ_TAG_COMMIT	"commit"
 44 ab9a70b2 2017-11-06 stsp #define GOT_OBJ_TAG_TREE	"tree"
 45 ab9a70b2 2017-11-06 stsp #define GOT_OBJ_TAG_BLOB	"blob"
 46 ab9a70b2 2017-11-06 stsp 
 47 d1cda826 2017-11-06 stsp #define GOT_COMMIT_TAG_TREE		"tree "
 48 d1cda826 2017-11-06 stsp #define GOT_COMMIT_TAG_PARENT		"parent "
 49 d1cda826 2017-11-06 stsp #define GOT_COMMIT_TAG_AUTHOR		"author "
 50 d1cda826 2017-11-06 stsp #define GOT_COMMIT_TAG_COMMITTER	"committer "
 51 d1cda826 2017-11-06 stsp 
 52 f78b0693 2017-11-29 stsp char *
 53 d71d75ad 2017-11-05 stsp got_object_id_str(struct got_object_id *id, char *buf, size_t size)
 54 d71d75ad 2017-11-05 stsp {
 55 a1fd68d8 2018-01-12 stsp 	return got_sha1_digest_to_str(id->sha1, buf, size);
 56 a1fd68d8 2018-01-12 stsp }
 57 d71d75ad 2017-11-05 stsp 
 58 a1fd68d8 2018-01-12 stsp int
 59 a1fd68d8 2018-01-12 stsp got_object_id_cmp(struct got_object_id *id1, struct got_object_id *id2)
 60 a1fd68d8 2018-01-12 stsp {
 61 a1fd68d8 2018-01-12 stsp 	return memcmp(id1->sha1, id2->sha1, SHA1_DIGEST_LENGTH);
 62 a1fd68d8 2018-01-12 stsp }
 63 d71d75ad 2017-11-05 stsp 
 64 a1fd68d8 2018-01-12 stsp const char *
 65 a1fd68d8 2018-01-12 stsp got_object_get_type_tag(int type)
 66 a1fd68d8 2018-01-12 stsp {
 67 a1fd68d8 2018-01-12 stsp 	switch (type) {
 68 a1fd68d8 2018-01-12 stsp 	case GOT_OBJ_TYPE_COMMIT:
 69 a1fd68d8 2018-01-12 stsp 		return GOT_OBJ_TAG_COMMIT;
 70 a1fd68d8 2018-01-12 stsp 	case GOT_OBJ_TYPE_TREE:
 71 a1fd68d8 2018-01-12 stsp 		return GOT_OBJ_TAG_TREE;
 72 a1fd68d8 2018-01-12 stsp 	case GOT_OBJ_TYPE_BLOB:
 73 a1fd68d8 2018-01-12 stsp 		return GOT_OBJ_TAG_BLOB;
 74 d71d75ad 2017-11-05 stsp 	}
 75 d71d75ad 2017-11-05 stsp 
 76 a1fd68d8 2018-01-12 stsp 	return NULL;
 77 d71d75ad 2017-11-05 stsp }
 78 ab9a70b2 2017-11-06 stsp 
 79 ab9a70b2 2017-11-06 stsp static void
 80 ab9a70b2 2017-11-06 stsp inflate_end(struct got_zstream_buf *zb)
 81 ab9a70b2 2017-11-06 stsp {
 82 ab9a70b2 2017-11-06 stsp 	free(zb->inbuf);
 83 ab9a70b2 2017-11-06 stsp 	free(zb->outbuf);
 84 ab9a70b2 2017-11-06 stsp 	inflateEnd(&zb->z);
 85 ab9a70b2 2017-11-06 stsp }
 86 ab9a70b2 2017-11-06 stsp 
 87 ab9a70b2 2017-11-06 stsp static const struct got_error *
 88 ab9a70b2 2017-11-06 stsp inflate_init(struct got_zstream_buf *zb, size_t bufsize)
 89 ab9a70b2 2017-11-06 stsp {
 90 ab9a70b2 2017-11-06 stsp 	const struct got_error *err = NULL;
 91 ab9a70b2 2017-11-06 stsp 
 92 ab9a70b2 2017-11-06 stsp 	memset(zb, 0, sizeof(*zb));
 93 ab9a70b2 2017-11-06 stsp 
 94 ab9a70b2 2017-11-06 stsp 	zb->z.zalloc = Z_NULL;
 95 ab9a70b2 2017-11-06 stsp 	zb->z.zfree = Z_NULL;
 96 ab9a70b2 2017-11-06 stsp 	if (inflateInit(&zb->z) != Z_OK) {
 97 ab9a70b2 2017-11-06 stsp 		err = got_error(GOT_ERR_IO);
 98 ab9a70b2 2017-11-06 stsp 		goto done;
 99 ab9a70b2 2017-11-06 stsp 	}
100 ab9a70b2 2017-11-06 stsp 
101 ab9a70b2 2017-11-06 stsp 	zb->inlen = zb->outlen = bufsize;
102 ab9a70b2 2017-11-06 stsp 
103 ab9a70b2 2017-11-06 stsp 	zb->inbuf = calloc(1, zb->inlen);
104 ab9a70b2 2017-11-06 stsp 	if (zb->inbuf == NULL) {
105 ab9a70b2 2017-11-06 stsp 		err = got_error(GOT_ERR_NO_MEM);
106 ab9a70b2 2017-11-06 stsp 		goto done;
107 ab9a70b2 2017-11-06 stsp 	}
108 ab9a70b2 2017-11-06 stsp 
109 ab9a70b2 2017-11-06 stsp 	zb->outbuf = calloc(1, zb->outlen);
110 ab9a70b2 2017-11-06 stsp 	if (zb->outbuf == NULL) {
111 ab9a70b2 2017-11-06 stsp 		err = got_error(GOT_ERR_NO_MEM);
112 ab9a70b2 2017-11-06 stsp 		goto done;
113 ab9a70b2 2017-11-06 stsp 	}
114 ab9a70b2 2017-11-06 stsp 
115 ab9a70b2 2017-11-06 stsp done:
116 ab9a70b2 2017-11-06 stsp 	if (err)
117 ab9a70b2 2017-11-06 stsp 		inflate_end(zb);
118 ab9a70b2 2017-11-06 stsp 	return err;
119 ab9a70b2 2017-11-06 stsp }
120 ab9a70b2 2017-11-06 stsp 
121 ab9a70b2 2017-11-06 stsp static const struct got_error *
122 ab9a70b2 2017-11-06 stsp inflate_read(struct got_zstream_buf *zb, FILE *f, size_t *outlenp)
123 ab9a70b2 2017-11-06 stsp {
124 ab9a70b2 2017-11-06 stsp 	size_t last_total_out = zb->z.total_out;
125 ab9a70b2 2017-11-06 stsp 	z_stream *z = &zb->z;
126 ab9a70b2 2017-11-06 stsp 	int n, ret;
127 ab9a70b2 2017-11-06 stsp 
128 ab9a70b2 2017-11-06 stsp 	z->next_out = zb->outbuf;
129 ab9a70b2 2017-11-06 stsp 	z->avail_out = zb->outlen;
130 ab9a70b2 2017-11-06 stsp 
131 a3e2cbea 2017-12-01 stsp 	do {
132 a3e2cbea 2017-12-01 stsp 		if (z->avail_in == 0) {
133 a3e2cbea 2017-12-01 stsp 			int i;
134 a3e2cbea 2017-12-01 stsp 			n = fread(zb->inbuf, 1, zb->inlen, f);
135 a3e2cbea 2017-12-01 stsp 			if (n == 0) {
136 a3e2cbea 2017-12-01 stsp 				if (ferror(f))
137 6c00b545 2018-01-17 stsp 					return got_ferror(f, GOT_ERR_IO);
138 a3e2cbea 2017-12-01 stsp 				*outlenp = 0;
139 a3e2cbea 2017-12-01 stsp 				return NULL;
140 a3e2cbea 2017-12-01 stsp 			}
141 a3e2cbea 2017-12-01 stsp 			z->next_in = zb->inbuf;
142 a3e2cbea 2017-12-01 stsp 			z->avail_in = n;
143 ab9a70b2 2017-11-06 stsp 		}
144 a3e2cbea 2017-12-01 stsp 		ret = inflate(z, Z_SYNC_FLUSH);
145 a3e2cbea 2017-12-01 stsp 	} while (ret == Z_OK && z->avail_out > 0);
146 ab9a70b2 2017-11-06 stsp 
147 a3e2cbea 2017-12-01 stsp 	if (ret != Z_OK) {
148 a3e2cbea 2017-12-01 stsp 		if (ret != Z_STREAM_END)
149 a3e2cbea 2017-12-01 stsp 			return got_error(GOT_ERR_DECOMPRESSION);
150 a3e2cbea 2017-12-01 stsp 		zb->flags |= GOT_ZSTREAM_F_HAVE_MORE;
151 a3e2cbea 2017-12-01 stsp 	}
152 ab9a70b2 2017-11-06 stsp 
153 ab9a70b2 2017-11-06 stsp 	*outlenp = z->total_out - last_total_out;
154 ab9a70b2 2017-11-06 stsp 	return NULL;
155 ab9a70b2 2017-11-06 stsp }
156 ab9a70b2 2017-11-06 stsp 
157 ab9a70b2 2017-11-06 stsp static const struct got_error *
158 d1cda826 2017-11-06 stsp parse_object_header(struct got_object **obj, char *buf, size_t len)
159 ab9a70b2 2017-11-06 stsp {
160 ab9a70b2 2017-11-06 stsp 	const char *obj_tags[] = {
161 ab9a70b2 2017-11-06 stsp 		GOT_OBJ_TAG_COMMIT,
162 ab9a70b2 2017-11-06 stsp 		GOT_OBJ_TAG_TREE,
163 ab9a70b2 2017-11-06 stsp 		GOT_OBJ_TAG_BLOB
164 ab9a70b2 2017-11-06 stsp 	};
165 ab9a70b2 2017-11-06 stsp 	const int obj_types[] = {
166 ab9a70b2 2017-11-06 stsp 		GOT_OBJ_TYPE_COMMIT,
167 ab9a70b2 2017-11-06 stsp 		GOT_OBJ_TYPE_TREE,
168 ab9a70b2 2017-11-06 stsp 		GOT_OBJ_TYPE_BLOB,
169 ab9a70b2 2017-11-06 stsp 	};
170 ab9a70b2 2017-11-06 stsp 	int type = 0;
171 d1cda826 2017-11-06 stsp 	size_t size = 0, hdrlen = 0;
172 ab9a70b2 2017-11-06 stsp 	int i;
173 ab9a70b2 2017-11-06 stsp 	char *p = strchr(buf, '\0');
174 ab9a70b2 2017-11-06 stsp 
175 ab9a70b2 2017-11-06 stsp 	if (p == NULL)
176 ab9a70b2 2017-11-06 stsp 		return got_error(GOT_ERR_BAD_OBJ_HDR);
177 ab9a70b2 2017-11-06 stsp 
178 d1cda826 2017-11-06 stsp 	hdrlen = strlen(buf) + 1 /* '\0' */;
179 d1cda826 2017-11-06 stsp 
180 ab9a70b2 2017-11-06 stsp 	for (i = 0; i < nitems(obj_tags); i++) {
181 ab9a70b2 2017-11-06 stsp 		const char *tag = obj_tags[i];
182 63323519 2017-11-06 stsp 		size_t tlen = strlen(tag);
183 ab9a70b2 2017-11-06 stsp 		const char *errstr;
184 ab9a70b2 2017-11-06 stsp 
185 63323519 2017-11-06 stsp 		if (strncmp(buf, tag, tlen) != 0)
186 ab9a70b2 2017-11-06 stsp 			continue;
187 ab9a70b2 2017-11-06 stsp 
188 ab9a70b2 2017-11-06 stsp 		type = obj_types[i];
189 63323519 2017-11-06 stsp 		if (len <= tlen)
190 ab9a70b2 2017-11-06 stsp 			return got_error(GOT_ERR_BAD_OBJ_HDR);
191 63323519 2017-11-06 stsp 		size = strtonum(buf + tlen, 0, LONG_MAX, &errstr);
192 ab9a70b2 2017-11-06 stsp 		if (errstr != NULL)
193 ab9a70b2 2017-11-06 stsp 			return got_error(GOT_ERR_BAD_OBJ_HDR);
194 ab9a70b2 2017-11-06 stsp 		break;
195 ab9a70b2 2017-11-06 stsp 	}
196 ab9a70b2 2017-11-06 stsp 
197 ab9a70b2 2017-11-06 stsp 	if (type == 0)
198 ab9a70b2 2017-11-06 stsp 		return got_error(GOT_ERR_BAD_OBJ_HDR);
199 ab9a70b2 2017-11-06 stsp 
200 ab9a70b2 2017-11-06 stsp 	*obj = calloc(1, sizeof(**obj));
201 ab9a70b2 2017-11-06 stsp 	(*obj)->type = type;
202 d1cda826 2017-11-06 stsp 	(*obj)->hdrlen = hdrlen;
203 ab9a70b2 2017-11-06 stsp 	(*obj)->size = size;
204 ab9a70b2 2017-11-06 stsp 	return NULL;
205 ab9a70b2 2017-11-06 stsp }
206 ab9a70b2 2017-11-06 stsp 
207 ab9a70b2 2017-11-06 stsp static const struct got_error *
208 ab9a70b2 2017-11-06 stsp read_object_header(struct got_object **obj, struct got_repository *repo,
209 a1fd68d8 2018-01-12 stsp     FILE *f)
210 ab9a70b2 2017-11-06 stsp {
211 ab9a70b2 2017-11-06 stsp 	const struct got_error *err;
212 ab9a70b2 2017-11-06 stsp 	struct got_zstream_buf zb;
213 a3e2cbea 2017-12-01 stsp 	char *buf;
214 744d9326 2017-12-01 stsp 	size_t len;
215 a3e2cbea 2017-12-01 stsp 	const size_t zbsize = 64;
216 744d9326 2017-12-01 stsp 	size_t outlen, totlen;
217 ab9a70b2 2017-11-06 stsp 	int i, ret;
218 ab9a70b2 2017-11-06 stsp 
219 744d9326 2017-12-01 stsp 	buf = calloc(zbsize, sizeof(char));
220 a3e2cbea 2017-12-01 stsp 	if (buf == NULL)
221 a3e2cbea 2017-12-01 stsp 		return got_error(GOT_ERR_NO_MEM);
222 a3e2cbea 2017-12-01 stsp 
223 a3e2cbea 2017-12-01 stsp 	err = inflate_init(&zb, zbsize);
224 a1fd68d8 2018-01-12 stsp 	if (err)
225 ab9a70b2 2017-11-06 stsp 		return err;
226 ab9a70b2 2017-11-06 stsp 
227 a3e2cbea 2017-12-01 stsp 	i = 0;
228 744d9326 2017-12-01 stsp 	totlen = 0;
229 a3e2cbea 2017-12-01 stsp 	do {
230 a3e2cbea 2017-12-01 stsp 		err = inflate_read(&zb, f, &outlen);
231 a3e2cbea 2017-12-01 stsp 		if (err)
232 a3e2cbea 2017-12-01 stsp 			goto done;
233 e302c59e 2017-12-01 stsp 		if (strchr(zb.outbuf, '\0') == NULL) {
234 a3e2cbea 2017-12-01 stsp 			buf = recallocarray(buf, 1 + i, 2 + i, zbsize);
235 e302c59e 2017-12-01 stsp 			if (buf == NULL) {
236 e302c59e 2017-12-01 stsp 				err = got_error(GOT_ERR_NO_MEM);
237 e302c59e 2017-12-01 stsp 				goto done;
238 e302c59e 2017-12-01 stsp 			}
239 e302c59e 2017-12-01 stsp 		}
240 c56976de 2017-12-01 stsp 		memcpy(buf + totlen, zb.outbuf, outlen);
241 744d9326 2017-12-01 stsp 		totlen += outlen;
242 a3e2cbea 2017-12-01 stsp 		i++;
243 a3e2cbea 2017-12-01 stsp 	} while (strchr(zb.outbuf, '\0') == NULL);
244 ab9a70b2 2017-11-06 stsp 
245 744d9326 2017-12-01 stsp 	err = parse_object_header(obj, buf, totlen);
246 ab9a70b2 2017-11-06 stsp done:
247 ab9a70b2 2017-11-06 stsp 	inflate_end(&zb);
248 ab9a70b2 2017-11-06 stsp 	return err;
249 ab9a70b2 2017-11-06 stsp }
250 ab9a70b2 2017-11-06 stsp 
251 d1cda826 2017-11-06 stsp static const struct got_error *
252 4558fcd4 2018-01-14 stsp object_path(char **path, struct got_object_id *id, struct got_repository *repo)
253 ab9a70b2 2017-11-06 stsp {
254 ab9a70b2 2017-11-06 stsp 	const struct got_error *err = NULL;
255 ab9a70b2 2017-11-06 stsp 	char hex[SHA1_DIGEST_STRING_LENGTH];
256 d1cda826 2017-11-06 stsp 	char *path_objects = got_repo_get_path_objects(repo);
257 ab9a70b2 2017-11-06 stsp 
258 ab9a70b2 2017-11-06 stsp 	if (path_objects == NULL)
259 ab9a70b2 2017-11-06 stsp 		return got_error(GOT_ERR_NO_MEM);
260 ab9a70b2 2017-11-06 stsp 
261 ab9a70b2 2017-11-06 stsp 	got_object_id_str(id, hex, sizeof(hex));
262 ab9a70b2 2017-11-06 stsp 
263 d1cda826 2017-11-06 stsp 	if (asprintf(path, "%s/%.2x/%s", path_objects,
264 d1cda826 2017-11-06 stsp 	    id->sha1[0], hex + 2) == -1)
265 ab9a70b2 2017-11-06 stsp 		err = got_error(GOT_ERR_NO_MEM);
266 ab9a70b2 2017-11-06 stsp 
267 d1cda826 2017-11-06 stsp 	free(path_objects);
268 d1cda826 2017-11-06 stsp 	return err;
269 d1cda826 2017-11-06 stsp }
270 d1cda826 2017-11-06 stsp 
271 6c00b545 2018-01-17 stsp const struct got_error *
272 6c00b545 2018-01-17 stsp open_object(FILE **f, struct got_object *obj, struct got_repository *repo)
273 d1cda826 2017-11-06 stsp {
274 d1cda826 2017-11-06 stsp 	const struct got_error *err = NULL;
275 a1fd68d8 2018-01-12 stsp 	char *path;
276 d1cda826 2017-11-06 stsp 
277 3ee5fc21 2018-01-17 stsp 	if (obj->flags & GOT_OBJ_FLAG_PACKED)
278 3ee5fc21 2018-01-17 stsp 		return got_packfile_extract_object(f, obj, repo);
279 6c00b545 2018-01-17 stsp 
280 6c00b545 2018-01-17 stsp 	err = object_path(&path, &obj->id, repo);
281 d1cda826 2017-11-06 stsp 	if (err)
282 d1cda826 2017-11-06 stsp 		return err;
283 4558fcd4 2018-01-14 stsp 	*f = fopen(path, "rb");
284 4558fcd4 2018-01-14 stsp 	if (*f == NULL) {
285 6c00b545 2018-01-17 stsp 		err = got_error_from_errno();
286 6c00b545 2018-01-17 stsp 		goto done;
287 a1fd68d8 2018-01-12 stsp 	}
288 4558fcd4 2018-01-14 stsp done:
289 4558fcd4 2018-01-14 stsp 	free(path);
290 4558fcd4 2018-01-14 stsp 	return err;
291 4558fcd4 2018-01-14 stsp }
292 a1fd68d8 2018-01-12 stsp 
293 4558fcd4 2018-01-14 stsp const struct got_error *
294 4558fcd4 2018-01-14 stsp got_object_open(struct got_object **obj, struct got_repository *repo,
295 4558fcd4 2018-01-14 stsp     struct got_object_id *id)
296 4558fcd4 2018-01-14 stsp {
297 6c00b545 2018-01-17 stsp 	const struct got_error *err = NULL;
298 6c00b545 2018-01-17 stsp 	char *path;
299 4558fcd4 2018-01-14 stsp 	FILE *f;
300 4558fcd4 2018-01-14 stsp 
301 6c00b545 2018-01-17 stsp 	err = object_path(&path, id, repo);
302 4558fcd4 2018-01-14 stsp 	if (err)
303 4558fcd4 2018-01-14 stsp 		return err;
304 4558fcd4 2018-01-14 stsp 
305 6c00b545 2018-01-17 stsp 	f = fopen(path, "rb");
306 6c00b545 2018-01-17 stsp 	if (f == NULL) {
307 6c00b545 2018-01-17 stsp 		if (errno != ENOENT) {
308 6c00b545 2018-01-17 stsp 			err = got_error_from_errno();
309 6c00b545 2018-01-17 stsp 			goto done;
310 6c00b545 2018-01-17 stsp 		}
311 6c00b545 2018-01-17 stsp 		err = got_packfile_open_object(obj, id, repo);
312 6c00b545 2018-01-17 stsp 		if (err)
313 6c00b545 2018-01-17 stsp 			goto done;
314 6c00b545 2018-01-17 stsp 		if (*obj == NULL)
315 6c00b545 2018-01-17 stsp 			err = got_error(GOT_ERR_NO_OBJ);
316 6c00b545 2018-01-17 stsp 	} else {
317 6c00b545 2018-01-17 stsp 		err = read_object_header(obj, repo, f);
318 6c00b545 2018-01-17 stsp 		if (err)
319 6c00b545 2018-01-17 stsp 			goto done;
320 ab9a70b2 2017-11-06 stsp 		memcpy((*obj)->id.sha1, id->sha1, SHA1_DIGEST_LENGTH);
321 6c00b545 2018-01-17 stsp 	}
322 6c00b545 2018-01-17 stsp done:
323 6c00b545 2018-01-17 stsp 	free(path);
324 6c00b545 2018-01-17 stsp 	if (err && f)
325 a1fd68d8 2018-01-12 stsp 		fclose(f);
326 ab9a70b2 2017-11-06 stsp 	return err;
327 6c00b545 2018-01-17 stsp 
328 ab9a70b2 2017-11-06 stsp }
329 ab9a70b2 2017-11-06 stsp 
330 ab9a70b2 2017-11-06 stsp void
331 ab9a70b2 2017-11-06 stsp got_object_close(struct got_object *obj)
332 ab9a70b2 2017-11-06 stsp {
333 6c00b545 2018-01-17 stsp 	free(obj->path_packfile);
334 ab9a70b2 2017-11-06 stsp 	free(obj);
335 d1cda826 2017-11-06 stsp }
336 d1cda826 2017-11-06 stsp 
337 d1cda826 2017-11-06 stsp static int
338 d1cda826 2017-11-06 stsp commit_object_valid(struct got_commit_object *commit)
339 d1cda826 2017-11-06 stsp {
340 d1cda826 2017-11-06 stsp 	int i;
341 d1cda826 2017-11-06 stsp 	int n;
342 d1cda826 2017-11-06 stsp 
343 d1cda826 2017-11-06 stsp 	if (commit == NULL)
344 d1cda826 2017-11-06 stsp 		return 0;
345 d1cda826 2017-11-06 stsp 
346 d1cda826 2017-11-06 stsp 	n = 0;
347 d1cda826 2017-11-06 stsp 	for (i = 0; i < SHA1_DIGEST_LENGTH; i++) {
348 d1cda826 2017-11-06 stsp 		if (commit->tree_id.sha1[i] == 0)
349 d1cda826 2017-11-06 stsp 			n++;
350 d1cda826 2017-11-06 stsp 	}
351 d1cda826 2017-11-06 stsp 	if (n == SHA1_DIGEST_LENGTH)
352 d1cda826 2017-11-06 stsp 		return 0;
353 d1cda826 2017-11-06 stsp 
354 d1cda826 2017-11-06 stsp 	return 1;
355 ab9a70b2 2017-11-06 stsp }
356 d1cda826 2017-11-06 stsp 
357 d1cda826 2017-11-06 stsp static const struct got_error *
358 d1cda826 2017-11-06 stsp parse_commit_object(struct got_commit_object **commit, char *buf, size_t len)
359 d1cda826 2017-11-06 stsp {
360 d1cda826 2017-11-06 stsp 	const struct got_error *err = NULL;
361 d1cda826 2017-11-06 stsp 	char *s = buf;
362 d1cda826 2017-11-06 stsp 	size_t tlen;
363 d1cda826 2017-11-06 stsp 	ssize_t remain = (ssize_t)len;
364 d1cda826 2017-11-06 stsp  
365 d1cda826 2017-11-06 stsp 	*commit = calloc(1, sizeof(**commit));
366 d1cda826 2017-11-06 stsp 	if (*commit == NULL)
367 d1cda826 2017-11-06 stsp 		return got_error(GOT_ERR_NO_MEM);
368 d1cda826 2017-11-06 stsp 
369 d1cda826 2017-11-06 stsp 	SIMPLEQ_INIT(&(*commit)->parent_ids);
370 d1cda826 2017-11-06 stsp 
371 d1cda826 2017-11-06 stsp 	tlen = strlen(GOT_COMMIT_TAG_TREE);
372 d1cda826 2017-11-06 stsp 	if (strncmp(s, GOT_COMMIT_TAG_TREE, tlen) == 0) {
373 d1cda826 2017-11-06 stsp 		remain -= tlen;
374 d1cda826 2017-11-06 stsp 		if (remain < SHA1_DIGEST_STRING_LENGTH) {
375 d1cda826 2017-11-06 stsp 			err = got_error(GOT_ERR_BAD_OBJ_DATA);
376 d1cda826 2017-11-06 stsp 			goto done;
377 d1cda826 2017-11-06 stsp 		}
378 d1cda826 2017-11-06 stsp 		s += tlen;
379 d1cda826 2017-11-06 stsp 		if (!got_parse_sha1_digest((*commit)->tree_id.sha1, s)) {
380 d1cda826 2017-11-06 stsp 			err = got_error(GOT_ERR_BAD_OBJ_DATA);
381 d1cda826 2017-11-06 stsp 			goto done;
382 d1cda826 2017-11-06 stsp 		}
383 d1cda826 2017-11-06 stsp 		remain -= SHA1_DIGEST_STRING_LENGTH;
384 d1cda826 2017-11-06 stsp 		s += SHA1_DIGEST_STRING_LENGTH;
385 d1cda826 2017-11-06 stsp 	} else {
386 d1cda826 2017-11-06 stsp 		err = got_error(GOT_ERR_BAD_OBJ_DATA);
387 d1cda826 2017-11-06 stsp 		goto done;
388 d1cda826 2017-11-06 stsp 	}
389 d1cda826 2017-11-06 stsp 
390 d1cda826 2017-11-06 stsp 	tlen = strlen(GOT_COMMIT_TAG_PARENT);
391 d1cda826 2017-11-06 stsp 	while (strncmp(s, GOT_COMMIT_TAG_PARENT, tlen) == 0) {
392 d1cda826 2017-11-06 stsp 		struct got_parent_id *pid;
393 d1cda826 2017-11-06 stsp 
394 d1cda826 2017-11-06 stsp 		remain -= tlen;
395 d1cda826 2017-11-06 stsp 		if (remain < SHA1_DIGEST_STRING_LENGTH) {
396 d1cda826 2017-11-06 stsp 			err = got_error(GOT_ERR_BAD_OBJ_DATA);
397 d1cda826 2017-11-06 stsp 			goto done;
398 d1cda826 2017-11-06 stsp 		}	
399 d1cda826 2017-11-06 stsp 
400 d1cda826 2017-11-06 stsp 		pid = calloc(1, sizeof(*pid));
401 d1cda826 2017-11-06 stsp 		if (pid == NULL) {
402 d1cda826 2017-11-06 stsp 			err = got_error(GOT_ERR_NO_MEM);
403 d1cda826 2017-11-06 stsp 			goto done;
404 d1cda826 2017-11-06 stsp 		}
405 d1cda826 2017-11-06 stsp 		s += tlen;
406 d1cda826 2017-11-06 stsp 		if (!got_parse_sha1_digest(pid->id.sha1, s)) {
407 d1cda826 2017-11-06 stsp 			err = got_error(GOT_ERR_BAD_OBJ_DATA);
408 d1cda826 2017-11-06 stsp 			goto done;
409 d1cda826 2017-11-06 stsp 		}
410 d1cda826 2017-11-06 stsp 		SIMPLEQ_INSERT_TAIL(&(*commit)->parent_ids, pid, entry);
411 d1cda826 2017-11-06 stsp 		(*commit)->nparents++;
412 d1cda826 2017-11-06 stsp 
413 d1cda826 2017-11-06 stsp 		s += SHA1_DIGEST_STRING_LENGTH;
414 d1cda826 2017-11-06 stsp 	}
415 d1cda826 2017-11-06 stsp 
416 d1cda826 2017-11-06 stsp 	tlen = strlen(GOT_COMMIT_TAG_AUTHOR);
417 d1cda826 2017-11-06 stsp 	if (strncmp(s, GOT_COMMIT_TAG_AUTHOR, tlen) == 0) {
418 d1cda826 2017-11-06 stsp 		char *p;
419 d1cda826 2017-11-06 stsp 
420 d1cda826 2017-11-06 stsp 		remain -= tlen;
421 d1cda826 2017-11-06 stsp 		if (remain <= 0) {
422 d1cda826 2017-11-06 stsp 			err = got_error(GOT_ERR_BAD_OBJ_DATA);
423 d1cda826 2017-11-06 stsp 			goto done;
424 d1cda826 2017-11-06 stsp 		}
425 d1cda826 2017-11-06 stsp 		s += tlen;
426 d1cda826 2017-11-06 stsp 		p = strchr(s, '\n');
427 d1cda826 2017-11-06 stsp 		if (p == NULL) {
428 d1cda826 2017-11-06 stsp 			err = got_error(GOT_ERR_BAD_OBJ_DATA);
429 d1cda826 2017-11-06 stsp 			goto done;
430 d1cda826 2017-11-06 stsp 		}
431 d1cda826 2017-11-06 stsp 		*p = '\0';
432 d1cda826 2017-11-06 stsp 		(*commit)->author = strdup(s);
433 d1cda826 2017-11-06 stsp 		if ((*commit)->author == NULL) {
434 d1cda826 2017-11-06 stsp 			err = got_error(GOT_ERR_NO_MEM);
435 d1cda826 2017-11-06 stsp 			goto done;
436 d1cda826 2017-11-06 stsp 		}
437 d1cda826 2017-11-06 stsp 		s += strlen((*commit)->author) + 1;
438 d1cda826 2017-11-06 stsp 	}
439 d1cda826 2017-11-06 stsp 
440 d1cda826 2017-11-06 stsp 	tlen = strlen(GOT_COMMIT_TAG_COMMITTER);
441 d1cda826 2017-11-06 stsp 	if (strncmp(s, GOT_COMMIT_TAG_COMMITTER, tlen) == 0) {
442 d1cda826 2017-11-06 stsp 		char *p;
443 d1cda826 2017-11-06 stsp 
444 d1cda826 2017-11-06 stsp 		remain -= tlen;
445 d1cda826 2017-11-06 stsp 		if (remain <= 0) {
446 d1cda826 2017-11-06 stsp 			err = got_error(GOT_ERR_BAD_OBJ_DATA);
447 d1cda826 2017-11-06 stsp 			goto done;
448 d1cda826 2017-11-06 stsp 		}
449 d1cda826 2017-11-06 stsp 		s += tlen;
450 d1cda826 2017-11-06 stsp 		p = strchr(s, '\n');
451 d1cda826 2017-11-06 stsp 		if (p == NULL) {
452 d1cda826 2017-11-06 stsp 			err = got_error(GOT_ERR_BAD_OBJ_DATA);
453 d1cda826 2017-11-06 stsp 			goto done;
454 d1cda826 2017-11-06 stsp 		}
455 d1cda826 2017-11-06 stsp 		*p = '\0';
456 d1cda826 2017-11-06 stsp 		(*commit)->committer = strdup(s);
457 d1cda826 2017-11-06 stsp 		if ((*commit)->committer == NULL) {
458 d1cda826 2017-11-06 stsp 			err = got_error(GOT_ERR_NO_MEM);
459 d1cda826 2017-11-06 stsp 			goto done;
460 d1cda826 2017-11-06 stsp 		}
461 d1cda826 2017-11-06 stsp 		s += strlen((*commit)->committer) + 1;
462 d1cda826 2017-11-06 stsp 	}
463 d1cda826 2017-11-06 stsp 
464 d1cda826 2017-11-06 stsp 	(*commit)->logmsg = strdup(s);
465 d1cda826 2017-11-06 stsp done:
466 d1cda826 2017-11-06 stsp 	if (err)
467 d1cda826 2017-11-06 stsp 		got_object_commit_close(*commit);
468 0ffeb3c2 2017-11-26 stsp 	return err;
469 0ffeb3c2 2017-11-26 stsp }
470 0ffeb3c2 2017-11-26 stsp 
471 0ffeb3c2 2017-11-26 stsp static void
472 0ffeb3c2 2017-11-26 stsp tree_entry_close(struct got_tree_entry *te)
473 0ffeb3c2 2017-11-26 stsp {
474 0ffeb3c2 2017-11-26 stsp 	free(te->name);
475 0ffeb3c2 2017-11-26 stsp 	free(te);
476 0ffeb3c2 2017-11-26 stsp }
477 0ffeb3c2 2017-11-26 stsp 
478 0ffeb3c2 2017-11-26 stsp static const struct got_error *
479 0ffeb3c2 2017-11-26 stsp parse_tree_entry(struct got_tree_entry **te, size_t *elen, char *buf,
480 0ffeb3c2 2017-11-26 stsp     size_t maxlen)
481 0ffeb3c2 2017-11-26 stsp {
482 0ffeb3c2 2017-11-26 stsp 	char *p = buf, *space;
483 0ffeb3c2 2017-11-26 stsp 	const struct got_error *err = NULL;
484 0ffeb3c2 2017-11-26 stsp 	char hex[SHA1_DIGEST_STRING_LENGTH];
485 0ffeb3c2 2017-11-26 stsp 
486 0ffeb3c2 2017-11-26 stsp 	*te = calloc(1, sizeof(**te));
487 0ffeb3c2 2017-11-26 stsp 	if (*te == NULL)
488 0ffeb3c2 2017-11-26 stsp 		return got_error(GOT_ERR_NO_MEM);
489 0ffeb3c2 2017-11-26 stsp 
490 0ffeb3c2 2017-11-26 stsp 	*elen = strlen(buf) + 1;
491 0ffeb3c2 2017-11-26 stsp 	if (*elen > maxlen) {
492 0ffeb3c2 2017-11-26 stsp 		free(*te);
493 0ffeb3c2 2017-11-26 stsp 		return got_error(GOT_ERR_BAD_OBJ_DATA);
494 0ffeb3c2 2017-11-26 stsp 	}
495 0ffeb3c2 2017-11-26 stsp 
496 0ffeb3c2 2017-11-26 stsp 	space = strchr(buf, ' ');
497 0ffeb3c2 2017-11-26 stsp 	if (space == NULL) {
498 0ffeb3c2 2017-11-26 stsp 		free(*te);
499 0ffeb3c2 2017-11-26 stsp 		return got_error(GOT_ERR_BAD_OBJ_DATA);
500 0ffeb3c2 2017-11-26 stsp 	}
501 0ffeb3c2 2017-11-26 stsp 	while (*p != ' ') {
502 0ffeb3c2 2017-11-26 stsp 		if (*p < '0' && *p > '7') {
503 0ffeb3c2 2017-11-26 stsp 			err = got_error(GOT_ERR_BAD_OBJ_DATA);
504 0ffeb3c2 2017-11-26 stsp 			goto done;
505 0ffeb3c2 2017-11-26 stsp 		}
506 0ffeb3c2 2017-11-26 stsp 		(*te)->mode <<= 3;
507 0ffeb3c2 2017-11-26 stsp 		(*te)->mode |= *p - '0';
508 0ffeb3c2 2017-11-26 stsp 		p++;
509 0ffeb3c2 2017-11-26 stsp 	}
510 0ffeb3c2 2017-11-26 stsp 
511 0ffeb3c2 2017-11-26 stsp 	(*te)->name = strdup(space + 1);
512 0ffeb3c2 2017-11-26 stsp 	if (*elen > maxlen || maxlen - *elen < SHA1_DIGEST_LENGTH) {
513 0ffeb3c2 2017-11-26 stsp 		err = got_error(GOT_ERR_BAD_OBJ_DATA);
514 0ffeb3c2 2017-11-26 stsp 		goto done;
515 0ffeb3c2 2017-11-26 stsp 	}
516 0ffeb3c2 2017-11-26 stsp 	buf += strlen(buf) + 1;
517 0ffeb3c2 2017-11-26 stsp 	memcpy((*te)->id.sha1, buf, SHA1_DIGEST_LENGTH);
518 0ffeb3c2 2017-11-26 stsp 	*elen += SHA1_DIGEST_LENGTH;
519 0ffeb3c2 2017-11-26 stsp done:
520 0ffeb3c2 2017-11-26 stsp 	if (err)
521 0ffeb3c2 2017-11-26 stsp 		tree_entry_close(*te);
522 d1cda826 2017-11-06 stsp 	return err;
523 d1cda826 2017-11-06 stsp }
524 d1cda826 2017-11-06 stsp 
525 d1cda826 2017-11-06 stsp static const struct got_error *
526 0ffeb3c2 2017-11-26 stsp parse_tree_object(struct got_tree_object **tree, struct got_repository *repo,
527 0ffeb3c2 2017-11-26 stsp     char *buf, size_t len)
528 0ffeb3c2 2017-11-26 stsp {
529 0ffeb3c2 2017-11-26 stsp 	size_t remain = len;
530 0ffeb3c2 2017-11-26 stsp 	int nentries;
531 0ffeb3c2 2017-11-26 stsp 
532 0ffeb3c2 2017-11-26 stsp 	*tree = calloc(1, sizeof(**tree));
533 0ffeb3c2 2017-11-26 stsp 	if (*tree == NULL)
534 0ffeb3c2 2017-11-26 stsp 		return got_error(GOT_ERR_NO_MEM);
535 0ffeb3c2 2017-11-26 stsp 
536 0ffeb3c2 2017-11-26 stsp 	SIMPLEQ_INIT(&(*tree)->entries);
537 0ffeb3c2 2017-11-26 stsp 
538 0ffeb3c2 2017-11-26 stsp 	while (remain > 0) {
539 0ffeb3c2 2017-11-26 stsp 		struct got_tree_entry *te;
540 0ffeb3c2 2017-11-26 stsp 		size_t elen;
541 0ffeb3c2 2017-11-26 stsp 
542 0ffeb3c2 2017-11-26 stsp 		parse_tree_entry(&te, &elen, buf, remain);
543 0ffeb3c2 2017-11-26 stsp 		(*tree)->nentries++;
544 0ffeb3c2 2017-11-26 stsp 		SIMPLEQ_INSERT_TAIL(&(*tree)->entries, te, entry);
545 0ffeb3c2 2017-11-26 stsp 		buf += elen;
546 0ffeb3c2 2017-11-26 stsp 		remain -= elen;
547 0ffeb3c2 2017-11-26 stsp 	}
548 0ffeb3c2 2017-11-26 stsp 
549 0ffeb3c2 2017-11-26 stsp 	if (remain != 0) {
550 0ffeb3c2 2017-11-26 stsp 		got_object_tree_close(*tree);
551 0ffeb3c2 2017-11-26 stsp 		return got_error(GOT_ERR_BAD_OBJ_DATA);
552 0ffeb3c2 2017-11-26 stsp 	}
553 0ffeb3c2 2017-11-26 stsp 
554 0ffeb3c2 2017-11-26 stsp 	return NULL;
555 0ffeb3c2 2017-11-26 stsp }
556 0ffeb3c2 2017-11-26 stsp 
557 0ffeb3c2 2017-11-26 stsp static const struct got_error *
558 d1cda826 2017-11-06 stsp read_commit_object(struct got_commit_object **commit,
559 4558fcd4 2018-01-14 stsp     struct got_repository *repo, struct got_object *obj, FILE *f)
560 d1cda826 2017-11-06 stsp {
561 d1cda826 2017-11-06 stsp 	const struct got_error *err = NULL;
562 d1cda826 2017-11-06 stsp 	struct got_zstream_buf zb;
563 d1cda826 2017-11-06 stsp 	size_t len;
564 d1cda826 2017-11-06 stsp 	char *p;
565 d1cda826 2017-11-06 stsp 	int i, ret;
566 d1cda826 2017-11-06 stsp 
567 d1cda826 2017-11-06 stsp 	err = inflate_init(&zb, 8192);
568 4558fcd4 2018-01-14 stsp 	if (err)
569 d1cda826 2017-11-06 stsp 		return err;
570 d1cda826 2017-11-06 stsp 
571 d1cda826 2017-11-06 stsp 	do {
572 d1cda826 2017-11-06 stsp 		err = inflate_read(&zb, f, &len);
573 d1cda826 2017-11-06 stsp 		if (err || len == 0)
574 d1cda826 2017-11-06 stsp 			break;
575 d1cda826 2017-11-06 stsp 	} while (len < obj->hdrlen + obj->size);
576 d1cda826 2017-11-06 stsp 
577 d1cda826 2017-11-06 stsp 	if (len < obj->hdrlen + obj->size) {
578 d1cda826 2017-11-06 stsp 		err = got_error(GOT_ERR_BAD_OBJ_DATA);
579 d1cda826 2017-11-06 stsp 		goto done;
580 d1cda826 2017-11-06 stsp 	}
581 d1cda826 2017-11-06 stsp 
582 d1cda826 2017-11-06 stsp 	/* Skip object header. */
583 d1cda826 2017-11-06 stsp 	len -= obj->hdrlen;
584 d1cda826 2017-11-06 stsp 	err = parse_commit_object(commit, zb.outbuf + obj->hdrlen, len);
585 d1cda826 2017-11-06 stsp done:
586 d1cda826 2017-11-06 stsp 	inflate_end(&zb);
587 d1cda826 2017-11-06 stsp 	return err;
588 d1cda826 2017-11-06 stsp }
589 d1cda826 2017-11-06 stsp 
590 d1cda826 2017-11-06 stsp const struct got_error *
591 d1cda826 2017-11-06 stsp got_object_commit_open(struct got_commit_object **commit,
592 d1cda826 2017-11-06 stsp     struct got_repository *repo, struct got_object *obj)
593 d1cda826 2017-11-06 stsp {
594 d1cda826 2017-11-06 stsp 	const struct got_error *err = NULL;
595 4558fcd4 2018-01-14 stsp 	FILE *f;
596 d1cda826 2017-11-06 stsp 
597 d1cda826 2017-11-06 stsp 	if (obj->type != GOT_OBJ_TYPE_COMMIT)
598 d1cda826 2017-11-06 stsp 		return got_error(GOT_ERR_OBJ_TYPE);
599 d1cda826 2017-11-06 stsp 
600 6c00b545 2018-01-17 stsp 	err = open_object(&f, obj, repo);
601 d1cda826 2017-11-06 stsp 	if (err)
602 d1cda826 2017-11-06 stsp 		return err;
603 d1cda826 2017-11-06 stsp 
604 4558fcd4 2018-01-14 stsp 	err = read_commit_object(commit, repo, obj, f);
605 4558fcd4 2018-01-14 stsp 	fclose(f);
606 d1cda826 2017-11-06 stsp 	return err;
607 d1cda826 2017-11-06 stsp }
608 d1cda826 2017-11-06 stsp 
609 d1cda826 2017-11-06 stsp void
610 d1cda826 2017-11-06 stsp got_object_commit_close(struct got_commit_object *commit)
611 d1cda826 2017-11-06 stsp {
612 d1cda826 2017-11-06 stsp 	struct got_parent_id *pid;
613 d1cda826 2017-11-06 stsp 
614 d1cda826 2017-11-06 stsp 	while (!SIMPLEQ_EMPTY(&commit->parent_ids)) {
615 d1cda826 2017-11-06 stsp 		pid = SIMPLEQ_FIRST(&commit->parent_ids);
616 d1cda826 2017-11-06 stsp 		SIMPLEQ_REMOVE_HEAD(&commit->parent_ids, entry);
617 d1cda826 2017-11-06 stsp 		free(pid);
618 d1cda826 2017-11-06 stsp 	}
619 d1cda826 2017-11-06 stsp 
620 d1cda826 2017-11-06 stsp 	free(commit->author);
621 d1cda826 2017-11-06 stsp 	free(commit->committer);
622 d1cda826 2017-11-06 stsp 	free(commit->logmsg);
623 d1cda826 2017-11-06 stsp 	free(commit);
624 d1cda826 2017-11-06 stsp }
625 0ffeb3c2 2017-11-26 stsp 
626 0ffeb3c2 2017-11-26 stsp static const struct got_error *
627 0ffeb3c2 2017-11-26 stsp read_tree_object(struct got_tree_object **tree,
628 4558fcd4 2018-01-14 stsp     struct got_repository *repo, struct got_object *obj, FILE *f)
629 0ffeb3c2 2017-11-26 stsp {
630 0ffeb3c2 2017-11-26 stsp 	const struct got_error *err = NULL;
631 0ffeb3c2 2017-11-26 stsp 	struct got_zstream_buf zb;
632 0ffeb3c2 2017-11-26 stsp 	size_t len;
633 0ffeb3c2 2017-11-26 stsp 	char *p;
634 0ffeb3c2 2017-11-26 stsp 	int i, ret;
635 0ffeb3c2 2017-11-26 stsp 
636 0ffeb3c2 2017-11-26 stsp 	err = inflate_init(&zb, 8192);
637 4558fcd4 2018-01-14 stsp 	if (err)
638 0ffeb3c2 2017-11-26 stsp 		return err;
639 0ffeb3c2 2017-11-26 stsp 
640 0ffeb3c2 2017-11-26 stsp 	do {
641 0ffeb3c2 2017-11-26 stsp 		err = inflate_read(&zb, f, &len);
642 0ffeb3c2 2017-11-26 stsp 		if (err || len == 0)
643 0ffeb3c2 2017-11-26 stsp 			break;
644 0ffeb3c2 2017-11-26 stsp 	} while (len < obj->hdrlen + obj->size);
645 0ffeb3c2 2017-11-26 stsp 
646 0ffeb3c2 2017-11-26 stsp 	if (len < obj->hdrlen + obj->size) {
647 0ffeb3c2 2017-11-26 stsp 		err = got_error(GOT_ERR_BAD_OBJ_DATA);
648 0ffeb3c2 2017-11-26 stsp 		goto done;
649 0ffeb3c2 2017-11-26 stsp 	}
650 0ffeb3c2 2017-11-26 stsp 
651 0ffeb3c2 2017-11-26 stsp 	/* Skip object header. */
652 0ffeb3c2 2017-11-26 stsp 	len -= obj->hdrlen;
653 0ffeb3c2 2017-11-26 stsp 	err = parse_tree_object(tree, repo, zb.outbuf + obj->hdrlen, len);
654 0ffeb3c2 2017-11-26 stsp done:
655 0ffeb3c2 2017-11-26 stsp 	inflate_end(&zb);
656 0ffeb3c2 2017-11-26 stsp 	return err;
657 0ffeb3c2 2017-11-26 stsp }
658 0ffeb3c2 2017-11-26 stsp 
659 0ffeb3c2 2017-11-26 stsp const struct got_error *
660 0ffeb3c2 2017-11-26 stsp got_object_tree_open(struct got_tree_object **tree,
661 0ffeb3c2 2017-11-26 stsp     struct got_repository *repo, struct got_object *obj)
662 0ffeb3c2 2017-11-26 stsp {
663 0ffeb3c2 2017-11-26 stsp 	const struct got_error *err = NULL;
664 4558fcd4 2018-01-14 stsp 	FILE *f;
665 0ffeb3c2 2017-11-26 stsp 
666 0ffeb3c2 2017-11-26 stsp 	if (obj->type != GOT_OBJ_TYPE_TREE)
667 0ffeb3c2 2017-11-26 stsp 		return got_error(GOT_ERR_OBJ_TYPE);
668 0ffeb3c2 2017-11-26 stsp 
669 6c00b545 2018-01-17 stsp 	err = open_object(&f, obj, repo);
670 0ffeb3c2 2017-11-26 stsp 	if (err)
671 0ffeb3c2 2017-11-26 stsp 		return err;
672 0ffeb3c2 2017-11-26 stsp 
673 4558fcd4 2018-01-14 stsp 	err = read_tree_object(tree, repo, obj, f);
674 4558fcd4 2018-01-14 stsp 	fclose(f);
675 0ffeb3c2 2017-11-26 stsp 	return err;
676 0ffeb3c2 2017-11-26 stsp }
677 0ffeb3c2 2017-11-26 stsp 
678 0ffeb3c2 2017-11-26 stsp void
679 0ffeb3c2 2017-11-26 stsp got_object_tree_close(struct got_tree_object *tree)
680 0ffeb3c2 2017-11-26 stsp {
681 f715ca7f 2017-11-27 stsp 	struct got_tree_entry *te;
682 f715ca7f 2017-11-27 stsp 
683 f715ca7f 2017-11-27 stsp 	while (!SIMPLEQ_EMPTY(&tree->entries)) {
684 f715ca7f 2017-11-27 stsp 		te = SIMPLEQ_FIRST(&tree->entries);
685 f715ca7f 2017-11-27 stsp 		SIMPLEQ_REMOVE_HEAD(&tree->entries, entry);
686 f715ca7f 2017-11-27 stsp 		tree_entry_close(te);
687 f715ca7f 2017-11-27 stsp 	}
688 f715ca7f 2017-11-27 stsp 
689 f715ca7f 2017-11-27 stsp 	free(tree);
690 68482ea3 2017-11-27 stsp }
691 68482ea3 2017-11-27 stsp 
692 68482ea3 2017-11-27 stsp const struct got_error *
693 68482ea3 2017-11-27 stsp got_object_blob_open(struct got_blob_object **blob,
694 68482ea3 2017-11-27 stsp     struct got_repository *repo, struct got_object *obj, size_t blocksize)
695 68482ea3 2017-11-27 stsp {
696 68482ea3 2017-11-27 stsp 	const struct got_error *err = NULL;
697 68482ea3 2017-11-27 stsp 
698 68482ea3 2017-11-27 stsp 	if (obj->type != GOT_OBJ_TYPE_BLOB)
699 68482ea3 2017-11-27 stsp 		return got_error(GOT_ERR_OBJ_TYPE);
700 68482ea3 2017-11-27 stsp 
701 7d283eee 2017-11-29 stsp 	if (blocksize < obj->hdrlen)
702 7d283eee 2017-11-29 stsp 		return got_error(GOT_ERR_NO_SPACE);
703 7d283eee 2017-11-29 stsp 
704 68482ea3 2017-11-27 stsp 	*blob = calloc(1, sizeof(**blob));
705 4558fcd4 2018-01-14 stsp 	if (*blob == NULL)
706 68482ea3 2017-11-27 stsp 		return got_error(GOT_ERR_NO_MEM);
707 68482ea3 2017-11-27 stsp 
708 6c00b545 2018-01-17 stsp 	err = open_object(&((*blob)->f), obj, repo);
709 4558fcd4 2018-01-14 stsp 	if (err) {
710 68482ea3 2017-11-27 stsp 		free(*blob);
711 4558fcd4 2018-01-14 stsp 		return err;
712 68482ea3 2017-11-27 stsp 	}
713 68482ea3 2017-11-27 stsp 
714 68482ea3 2017-11-27 stsp 	err = inflate_init(&(*blob)->zb, blocksize);
715 68482ea3 2017-11-27 stsp 	if (err != NULL) {
716 68482ea3 2017-11-27 stsp 		fclose((*blob)->f);
717 68482ea3 2017-11-27 stsp 		free(*blob);
718 68482ea3 2017-11-27 stsp 		return err;
719 68482ea3 2017-11-27 stsp 	}
720 68482ea3 2017-11-27 stsp 
721 7d283eee 2017-11-29 stsp 	(*blob)->hdrlen = obj->hdrlen;
722 f78b0693 2017-11-29 stsp 	memcpy(&(*blob)->id.sha1, obj->id.sha1, SHA1_DIGEST_LENGTH);
723 7d283eee 2017-11-29 stsp 
724 68482ea3 2017-11-27 stsp 	return err;
725 0ffeb3c2 2017-11-26 stsp }
726 68482ea3 2017-11-27 stsp 
727 68482ea3 2017-11-27 stsp void
728 68482ea3 2017-11-27 stsp got_object_blob_close(struct got_blob_object *blob)
729 68482ea3 2017-11-27 stsp {
730 68482ea3 2017-11-27 stsp 	inflate_end(&blob->zb);
731 68482ea3 2017-11-27 stsp 	fclose(blob->f);
732 68482ea3 2017-11-27 stsp 	free(blob);
733 68482ea3 2017-11-27 stsp }
734 68482ea3 2017-11-27 stsp 
735 68482ea3 2017-11-27 stsp const struct got_error *
736 68482ea3 2017-11-27 stsp got_object_blob_read_block(struct got_blob_object *blob, size_t *outlenp)
737 68482ea3 2017-11-27 stsp {
738 68482ea3 2017-11-27 stsp 	return inflate_read(&blob->zb, blob->f, outlenp);
739 68482ea3 2017-11-27 stsp }