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 eef6493a 2018-01-19 stsp #include "object.h"
 35 d71d75ad 2017-11-05 stsp 
 36 ab9a70b2 2017-11-06 stsp #ifndef MIN
 37 ab9a70b2 2017-11-06 stsp #define	MIN(_a,_b) ((_a) < (_b) ? (_a) : (_b))
 38 ab9a70b2 2017-11-06 stsp #endif
 39 ab9a70b2 2017-11-06 stsp 
 40 ab9a70b2 2017-11-06 stsp #ifndef nitems
 41 ab9a70b2 2017-11-06 stsp #define nitems(_a) (sizeof(_a) / sizeof((_a)[0]))
 42 ab9a70b2 2017-11-06 stsp #endif
 43 ab9a70b2 2017-11-06 stsp 
 44 ab9a70b2 2017-11-06 stsp #define GOT_OBJ_TAG_COMMIT	"commit"
 45 ab9a70b2 2017-11-06 stsp #define GOT_OBJ_TAG_TREE	"tree"
 46 ab9a70b2 2017-11-06 stsp #define GOT_OBJ_TAG_BLOB	"blob"
 47 ab9a70b2 2017-11-06 stsp 
 48 d1cda826 2017-11-06 stsp #define GOT_COMMIT_TAG_TREE		"tree "
 49 d1cda826 2017-11-06 stsp #define GOT_COMMIT_TAG_PARENT		"parent "
 50 d1cda826 2017-11-06 stsp #define GOT_COMMIT_TAG_AUTHOR		"author "
 51 d1cda826 2017-11-06 stsp #define GOT_COMMIT_TAG_COMMITTER	"committer "
 52 d1cda826 2017-11-06 stsp 
 53 f78b0693 2017-11-29 stsp char *
 54 d71d75ad 2017-11-05 stsp got_object_id_str(struct got_object_id *id, char *buf, size_t size)
 55 d71d75ad 2017-11-05 stsp {
 56 a1fd68d8 2018-01-12 stsp 	return got_sha1_digest_to_str(id->sha1, buf, size);
 57 a1fd68d8 2018-01-12 stsp }
 58 d71d75ad 2017-11-05 stsp 
 59 a1fd68d8 2018-01-12 stsp int
 60 a1fd68d8 2018-01-12 stsp got_object_id_cmp(struct got_object_id *id1, struct got_object_id *id2)
 61 a1fd68d8 2018-01-12 stsp {
 62 a1fd68d8 2018-01-12 stsp 	return memcmp(id1->sha1, id2->sha1, SHA1_DIGEST_LENGTH);
 63 a1fd68d8 2018-01-12 stsp }
 64 d71d75ad 2017-11-05 stsp 
 65 b107e67f 2018-01-19 stsp int
 66 b107e67f 2018-01-19 stsp got_object_get_type(struct got_object *obj)
 67 a1fd68d8 2018-01-12 stsp {
 68 b107e67f 2018-01-19 stsp 	switch (obj->type) {
 69 a1fd68d8 2018-01-12 stsp 	case GOT_OBJ_TYPE_COMMIT:
 70 a1fd68d8 2018-01-12 stsp 	case GOT_OBJ_TYPE_TREE:
 71 a1fd68d8 2018-01-12 stsp 	case GOT_OBJ_TYPE_BLOB:
 72 b107e67f 2018-01-19 stsp 	case GOT_OBJ_TYPE_TAG:
 73 b107e67f 2018-01-19 stsp 		return obj->type;
 74 b107e67f 2018-01-19 stsp 	case GOT_OBJ_TYPE_REF_DELTA:
 75 b107e67f 2018-01-19 stsp 	case GOT_OBJ_TYPE_OFFSET_DELTA:
 76 b107e67f 2018-01-19 stsp 		return obj->base_type;
 77 d71d75ad 2017-11-05 stsp 	}
 78 d71d75ad 2017-11-05 stsp 
 79 b107e67f 2018-01-19 stsp 	abort();
 80 d71d75ad 2017-11-05 stsp }
 81 ab9a70b2 2017-11-06 stsp 
 82 ab9a70b2 2017-11-06 stsp static void
 83 ab9a70b2 2017-11-06 stsp inflate_end(struct got_zstream_buf *zb)
 84 ab9a70b2 2017-11-06 stsp {
 85 ab9a70b2 2017-11-06 stsp 	free(zb->inbuf);
 86 ab9a70b2 2017-11-06 stsp 	free(zb->outbuf);
 87 ab9a70b2 2017-11-06 stsp 	inflateEnd(&zb->z);
 88 ab9a70b2 2017-11-06 stsp }
 89 ab9a70b2 2017-11-06 stsp 
 90 ab9a70b2 2017-11-06 stsp static const struct got_error *
 91 ab9a70b2 2017-11-06 stsp inflate_init(struct got_zstream_buf *zb, size_t bufsize)
 92 ab9a70b2 2017-11-06 stsp {
 93 ab9a70b2 2017-11-06 stsp 	const struct got_error *err = NULL;
 94 ab9a70b2 2017-11-06 stsp 
 95 ab9a70b2 2017-11-06 stsp 	memset(zb, 0, sizeof(*zb));
 96 ab9a70b2 2017-11-06 stsp 
 97 ab9a70b2 2017-11-06 stsp 	zb->z.zalloc = Z_NULL;
 98 ab9a70b2 2017-11-06 stsp 	zb->z.zfree = Z_NULL;
 99 ab9a70b2 2017-11-06 stsp 	if (inflateInit(&zb->z) != Z_OK) {
100 ab9a70b2 2017-11-06 stsp 		err = got_error(GOT_ERR_IO);
101 ab9a70b2 2017-11-06 stsp 		goto done;
102 ab9a70b2 2017-11-06 stsp 	}
103 ab9a70b2 2017-11-06 stsp 
104 ab9a70b2 2017-11-06 stsp 	zb->inlen = zb->outlen = bufsize;
105 ab9a70b2 2017-11-06 stsp 
106 ab9a70b2 2017-11-06 stsp 	zb->inbuf = calloc(1, zb->inlen);
107 ab9a70b2 2017-11-06 stsp 	if (zb->inbuf == NULL) {
108 ab9a70b2 2017-11-06 stsp 		err = got_error(GOT_ERR_NO_MEM);
109 ab9a70b2 2017-11-06 stsp 		goto done;
110 ab9a70b2 2017-11-06 stsp 	}
111 ab9a70b2 2017-11-06 stsp 
112 ab9a70b2 2017-11-06 stsp 	zb->outbuf = calloc(1, zb->outlen);
113 ab9a70b2 2017-11-06 stsp 	if (zb->outbuf == NULL) {
114 ab9a70b2 2017-11-06 stsp 		err = got_error(GOT_ERR_NO_MEM);
115 ab9a70b2 2017-11-06 stsp 		goto done;
116 ab9a70b2 2017-11-06 stsp 	}
117 ab9a70b2 2017-11-06 stsp 
118 ab9a70b2 2017-11-06 stsp done:
119 ab9a70b2 2017-11-06 stsp 	if (err)
120 ab9a70b2 2017-11-06 stsp 		inflate_end(zb);
121 ab9a70b2 2017-11-06 stsp 	return err;
122 ab9a70b2 2017-11-06 stsp }
123 ab9a70b2 2017-11-06 stsp 
124 ab9a70b2 2017-11-06 stsp static const struct got_error *
125 ab9a70b2 2017-11-06 stsp inflate_read(struct got_zstream_buf *zb, FILE *f, size_t *outlenp)
126 ab9a70b2 2017-11-06 stsp {
127 ab9a70b2 2017-11-06 stsp 	size_t last_total_out = zb->z.total_out;
128 ab9a70b2 2017-11-06 stsp 	z_stream *z = &zb->z;
129 ab9a70b2 2017-11-06 stsp 	int n, ret;
130 ab9a70b2 2017-11-06 stsp 
131 ab9a70b2 2017-11-06 stsp 	z->next_out = zb->outbuf;
132 ab9a70b2 2017-11-06 stsp 	z->avail_out = zb->outlen;
133 ab9a70b2 2017-11-06 stsp 
134 a3e2cbea 2017-12-01 stsp 	do {
135 a3e2cbea 2017-12-01 stsp 		if (z->avail_in == 0) {
136 a3e2cbea 2017-12-01 stsp 			int i;
137 a3e2cbea 2017-12-01 stsp 			n = fread(zb->inbuf, 1, zb->inlen, f);
138 a3e2cbea 2017-12-01 stsp 			if (n == 0) {
139 a3e2cbea 2017-12-01 stsp 				if (ferror(f))
140 6c00b545 2018-01-17 stsp 					return got_ferror(f, GOT_ERR_IO);
141 a3e2cbea 2017-12-01 stsp 				*outlenp = 0;
142 a3e2cbea 2017-12-01 stsp 				return NULL;
143 a3e2cbea 2017-12-01 stsp 			}
144 a3e2cbea 2017-12-01 stsp 			z->next_in = zb->inbuf;
145 a3e2cbea 2017-12-01 stsp 			z->avail_in = n;
146 ab9a70b2 2017-11-06 stsp 		}
147 a3e2cbea 2017-12-01 stsp 		ret = inflate(z, Z_SYNC_FLUSH);
148 a3e2cbea 2017-12-01 stsp 	} while (ret == Z_OK && z->avail_out > 0);
149 ab9a70b2 2017-11-06 stsp 
150 a3e2cbea 2017-12-01 stsp 	if (ret != Z_OK) {
151 a3e2cbea 2017-12-01 stsp 		if (ret != Z_STREAM_END)
152 a3e2cbea 2017-12-01 stsp 			return got_error(GOT_ERR_DECOMPRESSION);
153 a3e2cbea 2017-12-01 stsp 		zb->flags |= GOT_ZSTREAM_F_HAVE_MORE;
154 a3e2cbea 2017-12-01 stsp 	}
155 ab9a70b2 2017-11-06 stsp 
156 ab9a70b2 2017-11-06 stsp 	*outlenp = z->total_out - last_total_out;
157 ab9a70b2 2017-11-06 stsp 	return NULL;
158 ab9a70b2 2017-11-06 stsp }
159 ab9a70b2 2017-11-06 stsp 
160 ab9a70b2 2017-11-06 stsp static const struct got_error *
161 d1cda826 2017-11-06 stsp parse_object_header(struct got_object **obj, char *buf, size_t len)
162 ab9a70b2 2017-11-06 stsp {
163 ab9a70b2 2017-11-06 stsp 	const char *obj_tags[] = {
164 ab9a70b2 2017-11-06 stsp 		GOT_OBJ_TAG_COMMIT,
165 ab9a70b2 2017-11-06 stsp 		GOT_OBJ_TAG_TREE,
166 ab9a70b2 2017-11-06 stsp 		GOT_OBJ_TAG_BLOB
167 ab9a70b2 2017-11-06 stsp 	};
168 ab9a70b2 2017-11-06 stsp 	const int obj_types[] = {
169 ab9a70b2 2017-11-06 stsp 		GOT_OBJ_TYPE_COMMIT,
170 ab9a70b2 2017-11-06 stsp 		GOT_OBJ_TYPE_TREE,
171 ab9a70b2 2017-11-06 stsp 		GOT_OBJ_TYPE_BLOB,
172 ab9a70b2 2017-11-06 stsp 	};
173 ab9a70b2 2017-11-06 stsp 	int type = 0;
174 d1cda826 2017-11-06 stsp 	size_t size = 0, hdrlen = 0;
175 ab9a70b2 2017-11-06 stsp 	int i;
176 ab9a70b2 2017-11-06 stsp 	char *p = strchr(buf, '\0');
177 ab9a70b2 2017-11-06 stsp 
178 ab9a70b2 2017-11-06 stsp 	if (p == NULL)
179 ab9a70b2 2017-11-06 stsp 		return got_error(GOT_ERR_BAD_OBJ_HDR);
180 ab9a70b2 2017-11-06 stsp 
181 d1cda826 2017-11-06 stsp 	hdrlen = strlen(buf) + 1 /* '\0' */;
182 d1cda826 2017-11-06 stsp 
183 ab9a70b2 2017-11-06 stsp 	for (i = 0; i < nitems(obj_tags); i++) {
184 ab9a70b2 2017-11-06 stsp 		const char *tag = obj_tags[i];
185 63323519 2017-11-06 stsp 		size_t tlen = strlen(tag);
186 ab9a70b2 2017-11-06 stsp 		const char *errstr;
187 ab9a70b2 2017-11-06 stsp 
188 63323519 2017-11-06 stsp 		if (strncmp(buf, tag, tlen) != 0)
189 ab9a70b2 2017-11-06 stsp 			continue;
190 ab9a70b2 2017-11-06 stsp 
191 ab9a70b2 2017-11-06 stsp 		type = obj_types[i];
192 63323519 2017-11-06 stsp 		if (len <= tlen)
193 ab9a70b2 2017-11-06 stsp 			return got_error(GOT_ERR_BAD_OBJ_HDR);
194 63323519 2017-11-06 stsp 		size = strtonum(buf + tlen, 0, LONG_MAX, &errstr);
195 ab9a70b2 2017-11-06 stsp 		if (errstr != NULL)
196 ab9a70b2 2017-11-06 stsp 			return got_error(GOT_ERR_BAD_OBJ_HDR);
197 ab9a70b2 2017-11-06 stsp 		break;
198 ab9a70b2 2017-11-06 stsp 	}
199 ab9a70b2 2017-11-06 stsp 
200 ab9a70b2 2017-11-06 stsp 	if (type == 0)
201 ab9a70b2 2017-11-06 stsp 		return got_error(GOT_ERR_BAD_OBJ_HDR);
202 ab9a70b2 2017-11-06 stsp 
203 ab9a70b2 2017-11-06 stsp 	*obj = calloc(1, sizeof(**obj));
204 ab9a70b2 2017-11-06 stsp 	(*obj)->type = type;
205 d1cda826 2017-11-06 stsp 	(*obj)->hdrlen = hdrlen;
206 ab9a70b2 2017-11-06 stsp 	(*obj)->size = size;
207 ab9a70b2 2017-11-06 stsp 	return NULL;
208 ab9a70b2 2017-11-06 stsp }
209 ab9a70b2 2017-11-06 stsp 
210 ab9a70b2 2017-11-06 stsp static const struct got_error *
211 ab9a70b2 2017-11-06 stsp read_object_header(struct got_object **obj, struct got_repository *repo,
212 a1fd68d8 2018-01-12 stsp     FILE *f)
213 ab9a70b2 2017-11-06 stsp {
214 ab9a70b2 2017-11-06 stsp 	const struct got_error *err;
215 ab9a70b2 2017-11-06 stsp 	struct got_zstream_buf zb;
216 a3e2cbea 2017-12-01 stsp 	char *buf;
217 744d9326 2017-12-01 stsp 	size_t len;
218 a3e2cbea 2017-12-01 stsp 	const size_t zbsize = 64;
219 744d9326 2017-12-01 stsp 	size_t outlen, totlen;
220 ab9a70b2 2017-11-06 stsp 	int i, ret;
221 ab9a70b2 2017-11-06 stsp 
222 744d9326 2017-12-01 stsp 	buf = calloc(zbsize, sizeof(char));
223 a3e2cbea 2017-12-01 stsp 	if (buf == NULL)
224 a3e2cbea 2017-12-01 stsp 		return got_error(GOT_ERR_NO_MEM);
225 a3e2cbea 2017-12-01 stsp 
226 a3e2cbea 2017-12-01 stsp 	err = inflate_init(&zb, zbsize);
227 a1fd68d8 2018-01-12 stsp 	if (err)
228 ab9a70b2 2017-11-06 stsp 		return err;
229 ab9a70b2 2017-11-06 stsp 
230 a3e2cbea 2017-12-01 stsp 	i = 0;
231 744d9326 2017-12-01 stsp 	totlen = 0;
232 a3e2cbea 2017-12-01 stsp 	do {
233 a3e2cbea 2017-12-01 stsp 		err = inflate_read(&zb, f, &outlen);
234 a3e2cbea 2017-12-01 stsp 		if (err)
235 a3e2cbea 2017-12-01 stsp 			goto done;
236 e302c59e 2017-12-01 stsp 		if (strchr(zb.outbuf, '\0') == NULL) {
237 a3e2cbea 2017-12-01 stsp 			buf = recallocarray(buf, 1 + i, 2 + i, zbsize);
238 e302c59e 2017-12-01 stsp 			if (buf == NULL) {
239 e302c59e 2017-12-01 stsp 				err = got_error(GOT_ERR_NO_MEM);
240 e302c59e 2017-12-01 stsp 				goto done;
241 e302c59e 2017-12-01 stsp 			}
242 e302c59e 2017-12-01 stsp 		}
243 c56976de 2017-12-01 stsp 		memcpy(buf + totlen, zb.outbuf, outlen);
244 744d9326 2017-12-01 stsp 		totlen += outlen;
245 a3e2cbea 2017-12-01 stsp 		i++;
246 a3e2cbea 2017-12-01 stsp 	} while (strchr(zb.outbuf, '\0') == NULL);
247 ab9a70b2 2017-11-06 stsp 
248 744d9326 2017-12-01 stsp 	err = parse_object_header(obj, buf, totlen);
249 ab9a70b2 2017-11-06 stsp done:
250 ab9a70b2 2017-11-06 stsp 	inflate_end(&zb);
251 ab9a70b2 2017-11-06 stsp 	return err;
252 ab9a70b2 2017-11-06 stsp }
253 ab9a70b2 2017-11-06 stsp 
254 d1cda826 2017-11-06 stsp static const struct got_error *
255 4558fcd4 2018-01-14 stsp object_path(char **path, struct got_object_id *id, struct got_repository *repo)
256 ab9a70b2 2017-11-06 stsp {
257 ab9a70b2 2017-11-06 stsp 	const struct got_error *err = NULL;
258 ab9a70b2 2017-11-06 stsp 	char hex[SHA1_DIGEST_STRING_LENGTH];
259 d1cda826 2017-11-06 stsp 	char *path_objects = got_repo_get_path_objects(repo);
260 ab9a70b2 2017-11-06 stsp 
261 ab9a70b2 2017-11-06 stsp 	if (path_objects == NULL)
262 ab9a70b2 2017-11-06 stsp 		return got_error(GOT_ERR_NO_MEM);
263 ab9a70b2 2017-11-06 stsp 
264 ab9a70b2 2017-11-06 stsp 	got_object_id_str(id, hex, sizeof(hex));
265 ab9a70b2 2017-11-06 stsp 
266 d1cda826 2017-11-06 stsp 	if (asprintf(path, "%s/%.2x/%s", path_objects,
267 d1cda826 2017-11-06 stsp 	    id->sha1[0], hex + 2) == -1)
268 ab9a70b2 2017-11-06 stsp 		err = got_error(GOT_ERR_NO_MEM);
269 ab9a70b2 2017-11-06 stsp 
270 d1cda826 2017-11-06 stsp 	free(path_objects);
271 d1cda826 2017-11-06 stsp 	return err;
272 d1cda826 2017-11-06 stsp }
273 d1cda826 2017-11-06 stsp 
274 6c00b545 2018-01-17 stsp const struct got_error *
275 6c00b545 2018-01-17 stsp open_object(FILE **f, struct got_object *obj, struct got_repository *repo)
276 d1cda826 2017-11-06 stsp {
277 d1cda826 2017-11-06 stsp 	const struct got_error *err = NULL;
278 a1fd68d8 2018-01-12 stsp 	char *path;
279 d1cda826 2017-11-06 stsp 
280 3ee5fc21 2018-01-17 stsp 	if (obj->flags & GOT_OBJ_FLAG_PACKED)
281 3ee5fc21 2018-01-17 stsp 		return got_packfile_extract_object(f, obj, repo);
282 6c00b545 2018-01-17 stsp 
283 6c00b545 2018-01-17 stsp 	err = object_path(&path, &obj->id, repo);
284 d1cda826 2017-11-06 stsp 	if (err)
285 d1cda826 2017-11-06 stsp 		return err;
286 4558fcd4 2018-01-14 stsp 	*f = fopen(path, "rb");
287 4558fcd4 2018-01-14 stsp 	if (*f == NULL) {
288 6c00b545 2018-01-17 stsp 		err = got_error_from_errno();
289 6c00b545 2018-01-17 stsp 		goto done;
290 a1fd68d8 2018-01-12 stsp 	}
291 4558fcd4 2018-01-14 stsp done:
292 4558fcd4 2018-01-14 stsp 	free(path);
293 4558fcd4 2018-01-14 stsp 	return err;
294 4558fcd4 2018-01-14 stsp }
295 a1fd68d8 2018-01-12 stsp 
296 4558fcd4 2018-01-14 stsp const struct got_error *
297 4558fcd4 2018-01-14 stsp got_object_open(struct got_object **obj, struct got_repository *repo,
298 4558fcd4 2018-01-14 stsp     struct got_object_id *id)
299 4558fcd4 2018-01-14 stsp {
300 6c00b545 2018-01-17 stsp 	const struct got_error *err = NULL;
301 6c00b545 2018-01-17 stsp 	char *path;
302 4558fcd4 2018-01-14 stsp 	FILE *f;
303 4558fcd4 2018-01-14 stsp 
304 6c00b545 2018-01-17 stsp 	err = object_path(&path, id, repo);
305 4558fcd4 2018-01-14 stsp 	if (err)
306 4558fcd4 2018-01-14 stsp 		return err;
307 4558fcd4 2018-01-14 stsp 
308 6c00b545 2018-01-17 stsp 	f = fopen(path, "rb");
309 6c00b545 2018-01-17 stsp 	if (f == NULL) {
310 6c00b545 2018-01-17 stsp 		if (errno != ENOENT) {
311 6c00b545 2018-01-17 stsp 			err = got_error_from_errno();
312 6c00b545 2018-01-17 stsp 			goto done;
313 6c00b545 2018-01-17 stsp 		}
314 6c00b545 2018-01-17 stsp 		err = got_packfile_open_object(obj, id, repo);
315 6c00b545 2018-01-17 stsp 		if (err)
316 6c00b545 2018-01-17 stsp 			goto done;
317 6c00b545 2018-01-17 stsp 		if (*obj == NULL)
318 6c00b545 2018-01-17 stsp 			err = got_error(GOT_ERR_NO_OBJ);
319 6c00b545 2018-01-17 stsp 	} else {
320 6c00b545 2018-01-17 stsp 		err = read_object_header(obj, repo, f);
321 6c00b545 2018-01-17 stsp 		if (err)
322 6c00b545 2018-01-17 stsp 			goto done;
323 ab9a70b2 2017-11-06 stsp 		memcpy((*obj)->id.sha1, id->sha1, SHA1_DIGEST_LENGTH);
324 6c00b545 2018-01-17 stsp 	}
325 6c00b545 2018-01-17 stsp done:
326 6c00b545 2018-01-17 stsp 	free(path);
327 6c00b545 2018-01-17 stsp 	if (err && f)
328 a1fd68d8 2018-01-12 stsp 		fclose(f);
329 ab9a70b2 2017-11-06 stsp 	return err;
330 6c00b545 2018-01-17 stsp 
331 ab9a70b2 2017-11-06 stsp }
332 ab9a70b2 2017-11-06 stsp 
333 ab9a70b2 2017-11-06 stsp void
334 ab9a70b2 2017-11-06 stsp got_object_close(struct got_object *obj)
335 ab9a70b2 2017-11-06 stsp {
336 6c00b545 2018-01-17 stsp 	free(obj->path_packfile);
337 ab9a70b2 2017-11-06 stsp 	free(obj);
338 d1cda826 2017-11-06 stsp }
339 d1cda826 2017-11-06 stsp 
340 d1cda826 2017-11-06 stsp static int
341 d1cda826 2017-11-06 stsp commit_object_valid(struct got_commit_object *commit)
342 d1cda826 2017-11-06 stsp {
343 d1cda826 2017-11-06 stsp 	int i;
344 d1cda826 2017-11-06 stsp 	int n;
345 d1cda826 2017-11-06 stsp 
346 d1cda826 2017-11-06 stsp 	if (commit == NULL)
347 d1cda826 2017-11-06 stsp 		return 0;
348 d1cda826 2017-11-06 stsp 
349 d1cda826 2017-11-06 stsp 	n = 0;
350 d1cda826 2017-11-06 stsp 	for (i = 0; i < SHA1_DIGEST_LENGTH; i++) {
351 d1cda826 2017-11-06 stsp 		if (commit->tree_id.sha1[i] == 0)
352 d1cda826 2017-11-06 stsp 			n++;
353 d1cda826 2017-11-06 stsp 	}
354 d1cda826 2017-11-06 stsp 	if (n == SHA1_DIGEST_LENGTH)
355 d1cda826 2017-11-06 stsp 		return 0;
356 d1cda826 2017-11-06 stsp 
357 d1cda826 2017-11-06 stsp 	return 1;
358 ab9a70b2 2017-11-06 stsp }
359 d1cda826 2017-11-06 stsp 
360 d1cda826 2017-11-06 stsp static const struct got_error *
361 d1cda826 2017-11-06 stsp parse_commit_object(struct got_commit_object **commit, char *buf, size_t len)
362 d1cda826 2017-11-06 stsp {
363 d1cda826 2017-11-06 stsp 	const struct got_error *err = NULL;
364 d1cda826 2017-11-06 stsp 	char *s = buf;
365 d1cda826 2017-11-06 stsp 	size_t tlen;
366 d1cda826 2017-11-06 stsp 	ssize_t remain = (ssize_t)len;
367 d1cda826 2017-11-06 stsp  
368 d1cda826 2017-11-06 stsp 	*commit = calloc(1, sizeof(**commit));
369 d1cda826 2017-11-06 stsp 	if (*commit == NULL)
370 d1cda826 2017-11-06 stsp 		return got_error(GOT_ERR_NO_MEM);
371 d1cda826 2017-11-06 stsp 
372 d1cda826 2017-11-06 stsp 	SIMPLEQ_INIT(&(*commit)->parent_ids);
373 d1cda826 2017-11-06 stsp 
374 d1cda826 2017-11-06 stsp 	tlen = strlen(GOT_COMMIT_TAG_TREE);
375 d1cda826 2017-11-06 stsp 	if (strncmp(s, GOT_COMMIT_TAG_TREE, tlen) == 0) {
376 d1cda826 2017-11-06 stsp 		remain -= tlen;
377 d1cda826 2017-11-06 stsp 		if (remain < SHA1_DIGEST_STRING_LENGTH) {
378 d1cda826 2017-11-06 stsp 			err = got_error(GOT_ERR_BAD_OBJ_DATA);
379 d1cda826 2017-11-06 stsp 			goto done;
380 d1cda826 2017-11-06 stsp 		}
381 d1cda826 2017-11-06 stsp 		s += tlen;
382 d1cda826 2017-11-06 stsp 		if (!got_parse_sha1_digest((*commit)->tree_id.sha1, s)) {
383 d1cda826 2017-11-06 stsp 			err = got_error(GOT_ERR_BAD_OBJ_DATA);
384 d1cda826 2017-11-06 stsp 			goto done;
385 d1cda826 2017-11-06 stsp 		}
386 d1cda826 2017-11-06 stsp 		remain -= SHA1_DIGEST_STRING_LENGTH;
387 d1cda826 2017-11-06 stsp 		s += SHA1_DIGEST_STRING_LENGTH;
388 d1cda826 2017-11-06 stsp 	} else {
389 d1cda826 2017-11-06 stsp 		err = got_error(GOT_ERR_BAD_OBJ_DATA);
390 d1cda826 2017-11-06 stsp 		goto done;
391 d1cda826 2017-11-06 stsp 	}
392 d1cda826 2017-11-06 stsp 
393 d1cda826 2017-11-06 stsp 	tlen = strlen(GOT_COMMIT_TAG_PARENT);
394 d1cda826 2017-11-06 stsp 	while (strncmp(s, GOT_COMMIT_TAG_PARENT, tlen) == 0) {
395 d1cda826 2017-11-06 stsp 		struct got_parent_id *pid;
396 d1cda826 2017-11-06 stsp 
397 d1cda826 2017-11-06 stsp 		remain -= tlen;
398 d1cda826 2017-11-06 stsp 		if (remain < SHA1_DIGEST_STRING_LENGTH) {
399 d1cda826 2017-11-06 stsp 			err = got_error(GOT_ERR_BAD_OBJ_DATA);
400 d1cda826 2017-11-06 stsp 			goto done;
401 d1cda826 2017-11-06 stsp 		}	
402 d1cda826 2017-11-06 stsp 
403 d1cda826 2017-11-06 stsp 		pid = calloc(1, sizeof(*pid));
404 d1cda826 2017-11-06 stsp 		if (pid == NULL) {
405 d1cda826 2017-11-06 stsp 			err = got_error(GOT_ERR_NO_MEM);
406 d1cda826 2017-11-06 stsp 			goto done;
407 d1cda826 2017-11-06 stsp 		}
408 d1cda826 2017-11-06 stsp 		s += tlen;
409 d1cda826 2017-11-06 stsp 		if (!got_parse_sha1_digest(pid->id.sha1, s)) {
410 d1cda826 2017-11-06 stsp 			err = got_error(GOT_ERR_BAD_OBJ_DATA);
411 d1cda826 2017-11-06 stsp 			goto done;
412 d1cda826 2017-11-06 stsp 		}
413 d1cda826 2017-11-06 stsp 		SIMPLEQ_INSERT_TAIL(&(*commit)->parent_ids, pid, entry);
414 d1cda826 2017-11-06 stsp 		(*commit)->nparents++;
415 d1cda826 2017-11-06 stsp 
416 d1cda826 2017-11-06 stsp 		s += SHA1_DIGEST_STRING_LENGTH;
417 d1cda826 2017-11-06 stsp 	}
418 d1cda826 2017-11-06 stsp 
419 d1cda826 2017-11-06 stsp 	tlen = strlen(GOT_COMMIT_TAG_AUTHOR);
420 d1cda826 2017-11-06 stsp 	if (strncmp(s, GOT_COMMIT_TAG_AUTHOR, tlen) == 0) {
421 d1cda826 2017-11-06 stsp 		char *p;
422 d1cda826 2017-11-06 stsp 
423 d1cda826 2017-11-06 stsp 		remain -= tlen;
424 d1cda826 2017-11-06 stsp 		if (remain <= 0) {
425 d1cda826 2017-11-06 stsp 			err = got_error(GOT_ERR_BAD_OBJ_DATA);
426 d1cda826 2017-11-06 stsp 			goto done;
427 d1cda826 2017-11-06 stsp 		}
428 d1cda826 2017-11-06 stsp 		s += tlen;
429 d1cda826 2017-11-06 stsp 		p = strchr(s, '\n');
430 d1cda826 2017-11-06 stsp 		if (p == NULL) {
431 d1cda826 2017-11-06 stsp 			err = got_error(GOT_ERR_BAD_OBJ_DATA);
432 d1cda826 2017-11-06 stsp 			goto done;
433 d1cda826 2017-11-06 stsp 		}
434 d1cda826 2017-11-06 stsp 		*p = '\0';
435 d1cda826 2017-11-06 stsp 		(*commit)->author = strdup(s);
436 d1cda826 2017-11-06 stsp 		if ((*commit)->author == NULL) {
437 d1cda826 2017-11-06 stsp 			err = got_error(GOT_ERR_NO_MEM);
438 d1cda826 2017-11-06 stsp 			goto done;
439 d1cda826 2017-11-06 stsp 		}
440 d1cda826 2017-11-06 stsp 		s += strlen((*commit)->author) + 1;
441 d1cda826 2017-11-06 stsp 	}
442 d1cda826 2017-11-06 stsp 
443 d1cda826 2017-11-06 stsp 	tlen = strlen(GOT_COMMIT_TAG_COMMITTER);
444 d1cda826 2017-11-06 stsp 	if (strncmp(s, GOT_COMMIT_TAG_COMMITTER, tlen) == 0) {
445 d1cda826 2017-11-06 stsp 		char *p;
446 d1cda826 2017-11-06 stsp 
447 d1cda826 2017-11-06 stsp 		remain -= tlen;
448 d1cda826 2017-11-06 stsp 		if (remain <= 0) {
449 d1cda826 2017-11-06 stsp 			err = got_error(GOT_ERR_BAD_OBJ_DATA);
450 d1cda826 2017-11-06 stsp 			goto done;
451 d1cda826 2017-11-06 stsp 		}
452 d1cda826 2017-11-06 stsp 		s += tlen;
453 d1cda826 2017-11-06 stsp 		p = strchr(s, '\n');
454 d1cda826 2017-11-06 stsp 		if (p == NULL) {
455 d1cda826 2017-11-06 stsp 			err = got_error(GOT_ERR_BAD_OBJ_DATA);
456 d1cda826 2017-11-06 stsp 			goto done;
457 d1cda826 2017-11-06 stsp 		}
458 d1cda826 2017-11-06 stsp 		*p = '\0';
459 d1cda826 2017-11-06 stsp 		(*commit)->committer = strdup(s);
460 d1cda826 2017-11-06 stsp 		if ((*commit)->committer == NULL) {
461 d1cda826 2017-11-06 stsp 			err = got_error(GOT_ERR_NO_MEM);
462 d1cda826 2017-11-06 stsp 			goto done;
463 d1cda826 2017-11-06 stsp 		}
464 d1cda826 2017-11-06 stsp 		s += strlen((*commit)->committer) + 1;
465 d1cda826 2017-11-06 stsp 	}
466 d1cda826 2017-11-06 stsp 
467 d1cda826 2017-11-06 stsp 	(*commit)->logmsg = strdup(s);
468 d1cda826 2017-11-06 stsp done:
469 d1cda826 2017-11-06 stsp 	if (err)
470 d1cda826 2017-11-06 stsp 		got_object_commit_close(*commit);
471 0ffeb3c2 2017-11-26 stsp 	return err;
472 0ffeb3c2 2017-11-26 stsp }
473 0ffeb3c2 2017-11-26 stsp 
474 0ffeb3c2 2017-11-26 stsp static void
475 0ffeb3c2 2017-11-26 stsp tree_entry_close(struct got_tree_entry *te)
476 0ffeb3c2 2017-11-26 stsp {
477 0ffeb3c2 2017-11-26 stsp 	free(te->name);
478 0ffeb3c2 2017-11-26 stsp 	free(te);
479 0ffeb3c2 2017-11-26 stsp }
480 0ffeb3c2 2017-11-26 stsp 
481 0ffeb3c2 2017-11-26 stsp static const struct got_error *
482 0ffeb3c2 2017-11-26 stsp parse_tree_entry(struct got_tree_entry **te, size_t *elen, char *buf,
483 0ffeb3c2 2017-11-26 stsp     size_t maxlen)
484 0ffeb3c2 2017-11-26 stsp {
485 0ffeb3c2 2017-11-26 stsp 	char *p = buf, *space;
486 0ffeb3c2 2017-11-26 stsp 	const struct got_error *err = NULL;
487 0ffeb3c2 2017-11-26 stsp 	char hex[SHA1_DIGEST_STRING_LENGTH];
488 0ffeb3c2 2017-11-26 stsp 
489 0ffeb3c2 2017-11-26 stsp 	*te = calloc(1, sizeof(**te));
490 0ffeb3c2 2017-11-26 stsp 	if (*te == NULL)
491 0ffeb3c2 2017-11-26 stsp 		return got_error(GOT_ERR_NO_MEM);
492 0ffeb3c2 2017-11-26 stsp 
493 0ffeb3c2 2017-11-26 stsp 	*elen = strlen(buf) + 1;
494 0ffeb3c2 2017-11-26 stsp 	if (*elen > maxlen) {
495 0ffeb3c2 2017-11-26 stsp 		free(*te);
496 0ffeb3c2 2017-11-26 stsp 		return got_error(GOT_ERR_BAD_OBJ_DATA);
497 0ffeb3c2 2017-11-26 stsp 	}
498 0ffeb3c2 2017-11-26 stsp 
499 0ffeb3c2 2017-11-26 stsp 	space = strchr(buf, ' ');
500 0ffeb3c2 2017-11-26 stsp 	if (space == NULL) {
501 0ffeb3c2 2017-11-26 stsp 		free(*te);
502 0ffeb3c2 2017-11-26 stsp 		return got_error(GOT_ERR_BAD_OBJ_DATA);
503 0ffeb3c2 2017-11-26 stsp 	}
504 0ffeb3c2 2017-11-26 stsp 	while (*p != ' ') {
505 0ffeb3c2 2017-11-26 stsp 		if (*p < '0' && *p > '7') {
506 0ffeb3c2 2017-11-26 stsp 			err = got_error(GOT_ERR_BAD_OBJ_DATA);
507 0ffeb3c2 2017-11-26 stsp 			goto done;
508 0ffeb3c2 2017-11-26 stsp 		}
509 0ffeb3c2 2017-11-26 stsp 		(*te)->mode <<= 3;
510 0ffeb3c2 2017-11-26 stsp 		(*te)->mode |= *p - '0';
511 0ffeb3c2 2017-11-26 stsp 		p++;
512 0ffeb3c2 2017-11-26 stsp 	}
513 0ffeb3c2 2017-11-26 stsp 
514 0ffeb3c2 2017-11-26 stsp 	(*te)->name = strdup(space + 1);
515 0ffeb3c2 2017-11-26 stsp 	if (*elen > maxlen || maxlen - *elen < SHA1_DIGEST_LENGTH) {
516 0ffeb3c2 2017-11-26 stsp 		err = got_error(GOT_ERR_BAD_OBJ_DATA);
517 0ffeb3c2 2017-11-26 stsp 		goto done;
518 0ffeb3c2 2017-11-26 stsp 	}
519 0ffeb3c2 2017-11-26 stsp 	buf += strlen(buf) + 1;
520 0ffeb3c2 2017-11-26 stsp 	memcpy((*te)->id.sha1, buf, SHA1_DIGEST_LENGTH);
521 0ffeb3c2 2017-11-26 stsp 	*elen += SHA1_DIGEST_LENGTH;
522 0ffeb3c2 2017-11-26 stsp done:
523 0ffeb3c2 2017-11-26 stsp 	if (err)
524 0ffeb3c2 2017-11-26 stsp 		tree_entry_close(*te);
525 d1cda826 2017-11-06 stsp 	return err;
526 d1cda826 2017-11-06 stsp }
527 d1cda826 2017-11-06 stsp 
528 d1cda826 2017-11-06 stsp static const struct got_error *
529 0ffeb3c2 2017-11-26 stsp parse_tree_object(struct got_tree_object **tree, struct got_repository *repo,
530 0ffeb3c2 2017-11-26 stsp     char *buf, size_t len)
531 0ffeb3c2 2017-11-26 stsp {
532 0ffeb3c2 2017-11-26 stsp 	size_t remain = len;
533 0ffeb3c2 2017-11-26 stsp 	int nentries;
534 0ffeb3c2 2017-11-26 stsp 
535 0ffeb3c2 2017-11-26 stsp 	*tree = calloc(1, sizeof(**tree));
536 0ffeb3c2 2017-11-26 stsp 	if (*tree == NULL)
537 0ffeb3c2 2017-11-26 stsp 		return got_error(GOT_ERR_NO_MEM);
538 0ffeb3c2 2017-11-26 stsp 
539 0ffeb3c2 2017-11-26 stsp 	SIMPLEQ_INIT(&(*tree)->entries);
540 0ffeb3c2 2017-11-26 stsp 
541 0ffeb3c2 2017-11-26 stsp 	while (remain > 0) {
542 0ffeb3c2 2017-11-26 stsp 		struct got_tree_entry *te;
543 0ffeb3c2 2017-11-26 stsp 		size_t elen;
544 0ffeb3c2 2017-11-26 stsp 
545 0ffeb3c2 2017-11-26 stsp 		parse_tree_entry(&te, &elen, buf, remain);
546 0ffeb3c2 2017-11-26 stsp 		(*tree)->nentries++;
547 0ffeb3c2 2017-11-26 stsp 		SIMPLEQ_INSERT_TAIL(&(*tree)->entries, te, entry);
548 0ffeb3c2 2017-11-26 stsp 		buf += elen;
549 0ffeb3c2 2017-11-26 stsp 		remain -= elen;
550 0ffeb3c2 2017-11-26 stsp 	}
551 0ffeb3c2 2017-11-26 stsp 
552 0ffeb3c2 2017-11-26 stsp 	if (remain != 0) {
553 0ffeb3c2 2017-11-26 stsp 		got_object_tree_close(*tree);
554 0ffeb3c2 2017-11-26 stsp 		return got_error(GOT_ERR_BAD_OBJ_DATA);
555 0ffeb3c2 2017-11-26 stsp 	}
556 0ffeb3c2 2017-11-26 stsp 
557 0ffeb3c2 2017-11-26 stsp 	return NULL;
558 0ffeb3c2 2017-11-26 stsp }
559 0ffeb3c2 2017-11-26 stsp 
560 0ffeb3c2 2017-11-26 stsp static const struct got_error *
561 d1cda826 2017-11-06 stsp read_commit_object(struct got_commit_object **commit,
562 4558fcd4 2018-01-14 stsp     struct got_repository *repo, struct got_object *obj, FILE *f)
563 d1cda826 2017-11-06 stsp {
564 d1cda826 2017-11-06 stsp 	const struct got_error *err = NULL;
565 d1cda826 2017-11-06 stsp 	struct got_zstream_buf zb;
566 d1cda826 2017-11-06 stsp 	size_t len;
567 d1cda826 2017-11-06 stsp 	char *p;
568 d1cda826 2017-11-06 stsp 	int i, ret;
569 d1cda826 2017-11-06 stsp 
570 d1cda826 2017-11-06 stsp 	err = inflate_init(&zb, 8192);
571 4558fcd4 2018-01-14 stsp 	if (err)
572 d1cda826 2017-11-06 stsp 		return err;
573 d1cda826 2017-11-06 stsp 
574 d1cda826 2017-11-06 stsp 	do {
575 d1cda826 2017-11-06 stsp 		err = inflate_read(&zb, f, &len);
576 d1cda826 2017-11-06 stsp 		if (err || len == 0)
577 d1cda826 2017-11-06 stsp 			break;
578 d1cda826 2017-11-06 stsp 	} while (len < obj->hdrlen + obj->size);
579 d1cda826 2017-11-06 stsp 
580 d1cda826 2017-11-06 stsp 	if (len < obj->hdrlen + obj->size) {
581 d1cda826 2017-11-06 stsp 		err = got_error(GOT_ERR_BAD_OBJ_DATA);
582 d1cda826 2017-11-06 stsp 		goto done;
583 d1cda826 2017-11-06 stsp 	}
584 d1cda826 2017-11-06 stsp 
585 d1cda826 2017-11-06 stsp 	/* Skip object header. */
586 d1cda826 2017-11-06 stsp 	len -= obj->hdrlen;
587 d1cda826 2017-11-06 stsp 	err = parse_commit_object(commit, zb.outbuf + obj->hdrlen, len);
588 d1cda826 2017-11-06 stsp done:
589 d1cda826 2017-11-06 stsp 	inflate_end(&zb);
590 d1cda826 2017-11-06 stsp 	return err;
591 d1cda826 2017-11-06 stsp }
592 d1cda826 2017-11-06 stsp 
593 d1cda826 2017-11-06 stsp const struct got_error *
594 d1cda826 2017-11-06 stsp got_object_commit_open(struct got_commit_object **commit,
595 d1cda826 2017-11-06 stsp     struct got_repository *repo, struct got_object *obj)
596 d1cda826 2017-11-06 stsp {
597 d1cda826 2017-11-06 stsp 	const struct got_error *err = NULL;
598 4558fcd4 2018-01-14 stsp 	FILE *f;
599 d1cda826 2017-11-06 stsp 
600 d1cda826 2017-11-06 stsp 	if (obj->type != GOT_OBJ_TYPE_COMMIT)
601 d1cda826 2017-11-06 stsp 		return got_error(GOT_ERR_OBJ_TYPE);
602 d1cda826 2017-11-06 stsp 
603 6c00b545 2018-01-17 stsp 	err = open_object(&f, obj, repo);
604 d1cda826 2017-11-06 stsp 	if (err)
605 d1cda826 2017-11-06 stsp 		return err;
606 d1cda826 2017-11-06 stsp 
607 4558fcd4 2018-01-14 stsp 	err = read_commit_object(commit, repo, obj, f);
608 4558fcd4 2018-01-14 stsp 	fclose(f);
609 d1cda826 2017-11-06 stsp 	return err;
610 d1cda826 2017-11-06 stsp }
611 d1cda826 2017-11-06 stsp 
612 d1cda826 2017-11-06 stsp void
613 d1cda826 2017-11-06 stsp got_object_commit_close(struct got_commit_object *commit)
614 d1cda826 2017-11-06 stsp {
615 d1cda826 2017-11-06 stsp 	struct got_parent_id *pid;
616 d1cda826 2017-11-06 stsp 
617 d1cda826 2017-11-06 stsp 	while (!SIMPLEQ_EMPTY(&commit->parent_ids)) {
618 d1cda826 2017-11-06 stsp 		pid = SIMPLEQ_FIRST(&commit->parent_ids);
619 d1cda826 2017-11-06 stsp 		SIMPLEQ_REMOVE_HEAD(&commit->parent_ids, entry);
620 d1cda826 2017-11-06 stsp 		free(pid);
621 d1cda826 2017-11-06 stsp 	}
622 d1cda826 2017-11-06 stsp 
623 d1cda826 2017-11-06 stsp 	free(commit->author);
624 d1cda826 2017-11-06 stsp 	free(commit->committer);
625 d1cda826 2017-11-06 stsp 	free(commit->logmsg);
626 d1cda826 2017-11-06 stsp 	free(commit);
627 d1cda826 2017-11-06 stsp }
628 0ffeb3c2 2017-11-26 stsp 
629 0ffeb3c2 2017-11-26 stsp static const struct got_error *
630 0ffeb3c2 2017-11-26 stsp read_tree_object(struct got_tree_object **tree,
631 4558fcd4 2018-01-14 stsp     struct got_repository *repo, struct got_object *obj, FILE *f)
632 0ffeb3c2 2017-11-26 stsp {
633 0ffeb3c2 2017-11-26 stsp 	const struct got_error *err = NULL;
634 0ffeb3c2 2017-11-26 stsp 	struct got_zstream_buf zb;
635 0ffeb3c2 2017-11-26 stsp 	size_t len;
636 0ffeb3c2 2017-11-26 stsp 	char *p;
637 0ffeb3c2 2017-11-26 stsp 	int i, ret;
638 0ffeb3c2 2017-11-26 stsp 
639 0ffeb3c2 2017-11-26 stsp 	err = inflate_init(&zb, 8192);
640 4558fcd4 2018-01-14 stsp 	if (err)
641 0ffeb3c2 2017-11-26 stsp 		return err;
642 0ffeb3c2 2017-11-26 stsp 
643 0ffeb3c2 2017-11-26 stsp 	do {
644 0ffeb3c2 2017-11-26 stsp 		err = inflate_read(&zb, f, &len);
645 0ffeb3c2 2017-11-26 stsp 		if (err || len == 0)
646 0ffeb3c2 2017-11-26 stsp 			break;
647 0ffeb3c2 2017-11-26 stsp 	} while (len < obj->hdrlen + obj->size);
648 0ffeb3c2 2017-11-26 stsp 
649 0ffeb3c2 2017-11-26 stsp 	if (len < obj->hdrlen + obj->size) {
650 0ffeb3c2 2017-11-26 stsp 		err = got_error(GOT_ERR_BAD_OBJ_DATA);
651 0ffeb3c2 2017-11-26 stsp 		goto done;
652 0ffeb3c2 2017-11-26 stsp 	}
653 0ffeb3c2 2017-11-26 stsp 
654 0ffeb3c2 2017-11-26 stsp 	/* Skip object header. */
655 0ffeb3c2 2017-11-26 stsp 	len -= obj->hdrlen;
656 0ffeb3c2 2017-11-26 stsp 	err = parse_tree_object(tree, repo, zb.outbuf + obj->hdrlen, len);
657 0ffeb3c2 2017-11-26 stsp done:
658 0ffeb3c2 2017-11-26 stsp 	inflate_end(&zb);
659 0ffeb3c2 2017-11-26 stsp 	return err;
660 0ffeb3c2 2017-11-26 stsp }
661 0ffeb3c2 2017-11-26 stsp 
662 0ffeb3c2 2017-11-26 stsp const struct got_error *
663 0ffeb3c2 2017-11-26 stsp got_object_tree_open(struct got_tree_object **tree,
664 0ffeb3c2 2017-11-26 stsp     struct got_repository *repo, struct got_object *obj)
665 0ffeb3c2 2017-11-26 stsp {
666 0ffeb3c2 2017-11-26 stsp 	const struct got_error *err = NULL;
667 4558fcd4 2018-01-14 stsp 	FILE *f;
668 0ffeb3c2 2017-11-26 stsp 
669 0ffeb3c2 2017-11-26 stsp 	if (obj->type != GOT_OBJ_TYPE_TREE)
670 0ffeb3c2 2017-11-26 stsp 		return got_error(GOT_ERR_OBJ_TYPE);
671 0ffeb3c2 2017-11-26 stsp 
672 6c00b545 2018-01-17 stsp 	err = open_object(&f, obj, repo);
673 0ffeb3c2 2017-11-26 stsp 	if (err)
674 0ffeb3c2 2017-11-26 stsp 		return err;
675 0ffeb3c2 2017-11-26 stsp 
676 4558fcd4 2018-01-14 stsp 	err = read_tree_object(tree, repo, obj, f);
677 4558fcd4 2018-01-14 stsp 	fclose(f);
678 0ffeb3c2 2017-11-26 stsp 	return err;
679 0ffeb3c2 2017-11-26 stsp }
680 0ffeb3c2 2017-11-26 stsp 
681 0ffeb3c2 2017-11-26 stsp void
682 0ffeb3c2 2017-11-26 stsp got_object_tree_close(struct got_tree_object *tree)
683 0ffeb3c2 2017-11-26 stsp {
684 f715ca7f 2017-11-27 stsp 	struct got_tree_entry *te;
685 f715ca7f 2017-11-27 stsp 
686 f715ca7f 2017-11-27 stsp 	while (!SIMPLEQ_EMPTY(&tree->entries)) {
687 f715ca7f 2017-11-27 stsp 		te = SIMPLEQ_FIRST(&tree->entries);
688 f715ca7f 2017-11-27 stsp 		SIMPLEQ_REMOVE_HEAD(&tree->entries, entry);
689 f715ca7f 2017-11-27 stsp 		tree_entry_close(te);
690 f715ca7f 2017-11-27 stsp 	}
691 f715ca7f 2017-11-27 stsp 
692 f715ca7f 2017-11-27 stsp 	free(tree);
693 68482ea3 2017-11-27 stsp }
694 68482ea3 2017-11-27 stsp 
695 68482ea3 2017-11-27 stsp const struct got_error *
696 68482ea3 2017-11-27 stsp got_object_blob_open(struct got_blob_object **blob,
697 68482ea3 2017-11-27 stsp     struct got_repository *repo, struct got_object *obj, size_t blocksize)
698 68482ea3 2017-11-27 stsp {
699 68482ea3 2017-11-27 stsp 	const struct got_error *err = NULL;
700 68482ea3 2017-11-27 stsp 
701 68482ea3 2017-11-27 stsp 	if (obj->type != GOT_OBJ_TYPE_BLOB)
702 68482ea3 2017-11-27 stsp 		return got_error(GOT_ERR_OBJ_TYPE);
703 68482ea3 2017-11-27 stsp 
704 7d283eee 2017-11-29 stsp 	if (blocksize < obj->hdrlen)
705 7d283eee 2017-11-29 stsp 		return got_error(GOT_ERR_NO_SPACE);
706 7d283eee 2017-11-29 stsp 
707 68482ea3 2017-11-27 stsp 	*blob = calloc(1, sizeof(**blob));
708 4558fcd4 2018-01-14 stsp 	if (*blob == NULL)
709 68482ea3 2017-11-27 stsp 		return got_error(GOT_ERR_NO_MEM);
710 68482ea3 2017-11-27 stsp 
711 6c00b545 2018-01-17 stsp 	err = open_object(&((*blob)->f), obj, repo);
712 4558fcd4 2018-01-14 stsp 	if (err) {
713 68482ea3 2017-11-27 stsp 		free(*blob);
714 4558fcd4 2018-01-14 stsp 		return err;
715 68482ea3 2017-11-27 stsp 	}
716 68482ea3 2017-11-27 stsp 
717 68482ea3 2017-11-27 stsp 	err = inflate_init(&(*blob)->zb, blocksize);
718 68482ea3 2017-11-27 stsp 	if (err != NULL) {
719 68482ea3 2017-11-27 stsp 		fclose((*blob)->f);
720 68482ea3 2017-11-27 stsp 		free(*blob);
721 68482ea3 2017-11-27 stsp 		return err;
722 68482ea3 2017-11-27 stsp 	}
723 68482ea3 2017-11-27 stsp 
724 7d283eee 2017-11-29 stsp 	(*blob)->hdrlen = obj->hdrlen;
725 f78b0693 2017-11-29 stsp 	memcpy(&(*blob)->id.sha1, obj->id.sha1, SHA1_DIGEST_LENGTH);
726 7d283eee 2017-11-29 stsp 
727 68482ea3 2017-11-27 stsp 	return err;
728 0ffeb3c2 2017-11-26 stsp }
729 68482ea3 2017-11-27 stsp 
730 68482ea3 2017-11-27 stsp void
731 68482ea3 2017-11-27 stsp got_object_blob_close(struct got_blob_object *blob)
732 68482ea3 2017-11-27 stsp {
733 68482ea3 2017-11-27 stsp 	inflate_end(&blob->zb);
734 68482ea3 2017-11-27 stsp 	fclose(blob->f);
735 68482ea3 2017-11-27 stsp 	free(blob);
736 68482ea3 2017-11-27 stsp }
737 68482ea3 2017-11-27 stsp 
738 68482ea3 2017-11-27 stsp const struct got_error *
739 68482ea3 2017-11-27 stsp got_object_blob_read_block(struct got_blob_object *blob, size_t *outlenp)
740 68482ea3 2017-11-27 stsp {
741 68482ea3 2017-11-27 stsp 	return inflate_read(&blob->zb, blob->f, outlenp);
742 68482ea3 2017-11-27 stsp }