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 a3e2cbea 2017-12-01 stsp 					return got_error(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 d1cda826 2017-11-06 stsp object_path(char **path, struct got_object_id *id,
253 d1cda826 2017-11-06 stsp     struct got_repository *repo)
254 ab9a70b2 2017-11-06 stsp {
255 ab9a70b2 2017-11-06 stsp 	const struct got_error *err = NULL;
256 ab9a70b2 2017-11-06 stsp 	char hex[SHA1_DIGEST_STRING_LENGTH];
257 d1cda826 2017-11-06 stsp 	char *path_objects = got_repo_get_path_objects(repo);
258 ab9a70b2 2017-11-06 stsp 
259 ab9a70b2 2017-11-06 stsp 	if (path_objects == NULL)
260 ab9a70b2 2017-11-06 stsp 		return got_error(GOT_ERR_NO_MEM);
261 ab9a70b2 2017-11-06 stsp 
262 ab9a70b2 2017-11-06 stsp 	got_object_id_str(id, hex, sizeof(hex));
263 ab9a70b2 2017-11-06 stsp 
264 d1cda826 2017-11-06 stsp 	if (asprintf(path, "%s/%.2x/%s", path_objects,
265 d1cda826 2017-11-06 stsp 	    id->sha1[0], hex + 2) == -1)
266 ab9a70b2 2017-11-06 stsp 		err = got_error(GOT_ERR_NO_MEM);
267 ab9a70b2 2017-11-06 stsp 
268 d1cda826 2017-11-06 stsp 	free(path_objects);
269 d1cda826 2017-11-06 stsp 	return err;
270 d1cda826 2017-11-06 stsp }
271 d1cda826 2017-11-06 stsp 
272 d1cda826 2017-11-06 stsp const struct got_error *
273 d1cda826 2017-11-06 stsp got_object_open(struct got_object **obj, struct got_repository *repo,
274 d1cda826 2017-11-06 stsp     struct got_object_id *id)
275 d1cda826 2017-11-06 stsp {
276 d1cda826 2017-11-06 stsp 	const struct got_error *err = NULL;
277 a1fd68d8 2018-01-12 stsp 	char *path;
278 a1fd68d8 2018-01-12 stsp 	FILE *f = NULL;
279 d1cda826 2017-11-06 stsp 
280 d1cda826 2017-11-06 stsp 	err = object_path(&path, id, repo);
281 d1cda826 2017-11-06 stsp 	if (err)
282 d1cda826 2017-11-06 stsp 		return err;
283 d1cda826 2017-11-06 stsp 
284 a1fd68d8 2018-01-12 stsp 	f = fopen(path, "rb");
285 a1fd68d8 2018-01-12 stsp 	if (f == NULL) {
286 a1fd68d8 2018-01-12 stsp 		if (errno != ENOENT) {
287 f334529e 2018-01-12 stsp 			err = got_error_from_errno();
288 a1fd68d8 2018-01-12 stsp 			goto done;
289 a1fd68d8 2018-01-12 stsp 		}
290 a1fd68d8 2018-01-12 stsp 		err = got_packfile_extract_object(&f, id, repo);
291 a1fd68d8 2018-01-12 stsp 		if (err)
292 a1fd68d8 2018-01-12 stsp 			goto done;
293 a1fd68d8 2018-01-12 stsp 		if (f == NULL) {
294 a1fd68d8 2018-01-12 stsp 			err = got_error(GOT_ERR_NO_OBJ);
295 a1fd68d8 2018-01-12 stsp 			goto done;
296 a1fd68d8 2018-01-12 stsp 		}
297 a1fd68d8 2018-01-12 stsp 	}
298 a1fd68d8 2018-01-12 stsp 
299 a1fd68d8 2018-01-12 stsp 	err = read_object_header(obj, repo, f);
300 ab9a70b2 2017-11-06 stsp 	if (err == NULL)
301 ab9a70b2 2017-11-06 stsp 		memcpy((*obj)->id.sha1, id->sha1, SHA1_DIGEST_LENGTH);
302 ab9a70b2 2017-11-06 stsp done:
303 ab9a70b2 2017-11-06 stsp 	free(path);
304 a1fd68d8 2018-01-12 stsp 	if (f != NULL)
305 a1fd68d8 2018-01-12 stsp 		fclose(f);
306 ab9a70b2 2017-11-06 stsp 	return err;
307 ab9a70b2 2017-11-06 stsp }
308 ab9a70b2 2017-11-06 stsp 
309 ab9a70b2 2017-11-06 stsp void
310 ab9a70b2 2017-11-06 stsp got_object_close(struct got_object *obj)
311 ab9a70b2 2017-11-06 stsp {
312 ab9a70b2 2017-11-06 stsp 	free(obj);
313 d1cda826 2017-11-06 stsp }
314 d1cda826 2017-11-06 stsp 
315 d1cda826 2017-11-06 stsp static int
316 d1cda826 2017-11-06 stsp commit_object_valid(struct got_commit_object *commit)
317 d1cda826 2017-11-06 stsp {
318 d1cda826 2017-11-06 stsp 	int i;
319 d1cda826 2017-11-06 stsp 	int n;
320 d1cda826 2017-11-06 stsp 
321 d1cda826 2017-11-06 stsp 	if (commit == NULL)
322 d1cda826 2017-11-06 stsp 		return 0;
323 d1cda826 2017-11-06 stsp 
324 d1cda826 2017-11-06 stsp 	n = 0;
325 d1cda826 2017-11-06 stsp 	for (i = 0; i < SHA1_DIGEST_LENGTH; i++) {
326 d1cda826 2017-11-06 stsp 		if (commit->tree_id.sha1[i] == 0)
327 d1cda826 2017-11-06 stsp 			n++;
328 d1cda826 2017-11-06 stsp 	}
329 d1cda826 2017-11-06 stsp 	if (n == SHA1_DIGEST_LENGTH)
330 d1cda826 2017-11-06 stsp 		return 0;
331 d1cda826 2017-11-06 stsp 
332 d1cda826 2017-11-06 stsp 	return 1;
333 ab9a70b2 2017-11-06 stsp }
334 d1cda826 2017-11-06 stsp 
335 d1cda826 2017-11-06 stsp static const struct got_error *
336 d1cda826 2017-11-06 stsp parse_commit_object(struct got_commit_object **commit, char *buf, size_t len)
337 d1cda826 2017-11-06 stsp {
338 d1cda826 2017-11-06 stsp 	const struct got_error *err = NULL;
339 d1cda826 2017-11-06 stsp 	char *s = buf;
340 d1cda826 2017-11-06 stsp 	size_t tlen;
341 d1cda826 2017-11-06 stsp 	ssize_t remain = (ssize_t)len;
342 d1cda826 2017-11-06 stsp  
343 d1cda826 2017-11-06 stsp 	*commit = calloc(1, sizeof(**commit));
344 d1cda826 2017-11-06 stsp 	if (*commit == NULL)
345 d1cda826 2017-11-06 stsp 		return got_error(GOT_ERR_NO_MEM);
346 d1cda826 2017-11-06 stsp 
347 d1cda826 2017-11-06 stsp 	SIMPLEQ_INIT(&(*commit)->parent_ids);
348 d1cda826 2017-11-06 stsp 
349 d1cda826 2017-11-06 stsp 	tlen = strlen(GOT_COMMIT_TAG_TREE);
350 d1cda826 2017-11-06 stsp 	if (strncmp(s, GOT_COMMIT_TAG_TREE, tlen) == 0) {
351 d1cda826 2017-11-06 stsp 		remain -= tlen;
352 d1cda826 2017-11-06 stsp 		if (remain < SHA1_DIGEST_STRING_LENGTH) {
353 d1cda826 2017-11-06 stsp 			err = got_error(GOT_ERR_BAD_OBJ_DATA);
354 d1cda826 2017-11-06 stsp 			goto done;
355 d1cda826 2017-11-06 stsp 		}
356 d1cda826 2017-11-06 stsp 		s += tlen;
357 d1cda826 2017-11-06 stsp 		if (!got_parse_sha1_digest((*commit)->tree_id.sha1, s)) {
358 d1cda826 2017-11-06 stsp 			err = got_error(GOT_ERR_BAD_OBJ_DATA);
359 d1cda826 2017-11-06 stsp 			goto done;
360 d1cda826 2017-11-06 stsp 		}
361 d1cda826 2017-11-06 stsp 		remain -= SHA1_DIGEST_STRING_LENGTH;
362 d1cda826 2017-11-06 stsp 		s += SHA1_DIGEST_STRING_LENGTH;
363 d1cda826 2017-11-06 stsp 	} else {
364 d1cda826 2017-11-06 stsp 		err = got_error(GOT_ERR_BAD_OBJ_DATA);
365 d1cda826 2017-11-06 stsp 		goto done;
366 d1cda826 2017-11-06 stsp 	}
367 d1cda826 2017-11-06 stsp 
368 d1cda826 2017-11-06 stsp 	tlen = strlen(GOT_COMMIT_TAG_PARENT);
369 d1cda826 2017-11-06 stsp 	while (strncmp(s, GOT_COMMIT_TAG_PARENT, tlen) == 0) {
370 d1cda826 2017-11-06 stsp 		struct got_parent_id *pid;
371 d1cda826 2017-11-06 stsp 
372 d1cda826 2017-11-06 stsp 		remain -= tlen;
373 d1cda826 2017-11-06 stsp 		if (remain < SHA1_DIGEST_STRING_LENGTH) {
374 d1cda826 2017-11-06 stsp 			err = got_error(GOT_ERR_BAD_OBJ_DATA);
375 d1cda826 2017-11-06 stsp 			goto done;
376 d1cda826 2017-11-06 stsp 		}	
377 d1cda826 2017-11-06 stsp 
378 d1cda826 2017-11-06 stsp 		pid = calloc(1, sizeof(*pid));
379 d1cda826 2017-11-06 stsp 		if (pid == NULL) {
380 d1cda826 2017-11-06 stsp 			err = got_error(GOT_ERR_NO_MEM);
381 d1cda826 2017-11-06 stsp 			goto done;
382 d1cda826 2017-11-06 stsp 		}
383 d1cda826 2017-11-06 stsp 		s += tlen;
384 d1cda826 2017-11-06 stsp 		if (!got_parse_sha1_digest(pid->id.sha1, s)) {
385 d1cda826 2017-11-06 stsp 			err = got_error(GOT_ERR_BAD_OBJ_DATA);
386 d1cda826 2017-11-06 stsp 			goto done;
387 d1cda826 2017-11-06 stsp 		}
388 d1cda826 2017-11-06 stsp 		SIMPLEQ_INSERT_TAIL(&(*commit)->parent_ids, pid, entry);
389 d1cda826 2017-11-06 stsp 		(*commit)->nparents++;
390 d1cda826 2017-11-06 stsp 
391 d1cda826 2017-11-06 stsp 		s += SHA1_DIGEST_STRING_LENGTH;
392 d1cda826 2017-11-06 stsp 	}
393 d1cda826 2017-11-06 stsp 
394 d1cda826 2017-11-06 stsp 	tlen = strlen(GOT_COMMIT_TAG_AUTHOR);
395 d1cda826 2017-11-06 stsp 	if (strncmp(s, GOT_COMMIT_TAG_AUTHOR, tlen) == 0) {
396 d1cda826 2017-11-06 stsp 		char *p;
397 d1cda826 2017-11-06 stsp 
398 d1cda826 2017-11-06 stsp 		remain -= tlen;
399 d1cda826 2017-11-06 stsp 		if (remain <= 0) {
400 d1cda826 2017-11-06 stsp 			err = got_error(GOT_ERR_BAD_OBJ_DATA);
401 d1cda826 2017-11-06 stsp 			goto done;
402 d1cda826 2017-11-06 stsp 		}
403 d1cda826 2017-11-06 stsp 		s += tlen;
404 d1cda826 2017-11-06 stsp 		p = strchr(s, '\n');
405 d1cda826 2017-11-06 stsp 		if (p == NULL) {
406 d1cda826 2017-11-06 stsp 			err = got_error(GOT_ERR_BAD_OBJ_DATA);
407 d1cda826 2017-11-06 stsp 			goto done;
408 d1cda826 2017-11-06 stsp 		}
409 d1cda826 2017-11-06 stsp 		*p = '\0';
410 d1cda826 2017-11-06 stsp 		(*commit)->author = strdup(s);
411 d1cda826 2017-11-06 stsp 		if ((*commit)->author == NULL) {
412 d1cda826 2017-11-06 stsp 			err = got_error(GOT_ERR_NO_MEM);
413 d1cda826 2017-11-06 stsp 			goto done;
414 d1cda826 2017-11-06 stsp 		}
415 d1cda826 2017-11-06 stsp 		s += strlen((*commit)->author) + 1;
416 d1cda826 2017-11-06 stsp 	}
417 d1cda826 2017-11-06 stsp 
418 d1cda826 2017-11-06 stsp 	tlen = strlen(GOT_COMMIT_TAG_COMMITTER);
419 d1cda826 2017-11-06 stsp 	if (strncmp(s, GOT_COMMIT_TAG_COMMITTER, tlen) == 0) {
420 d1cda826 2017-11-06 stsp 		char *p;
421 d1cda826 2017-11-06 stsp 
422 d1cda826 2017-11-06 stsp 		remain -= tlen;
423 d1cda826 2017-11-06 stsp 		if (remain <= 0) {
424 d1cda826 2017-11-06 stsp 			err = got_error(GOT_ERR_BAD_OBJ_DATA);
425 d1cda826 2017-11-06 stsp 			goto done;
426 d1cda826 2017-11-06 stsp 		}
427 d1cda826 2017-11-06 stsp 		s += tlen;
428 d1cda826 2017-11-06 stsp 		p = strchr(s, '\n');
429 d1cda826 2017-11-06 stsp 		if (p == NULL) {
430 d1cda826 2017-11-06 stsp 			err = got_error(GOT_ERR_BAD_OBJ_DATA);
431 d1cda826 2017-11-06 stsp 			goto done;
432 d1cda826 2017-11-06 stsp 		}
433 d1cda826 2017-11-06 stsp 		*p = '\0';
434 d1cda826 2017-11-06 stsp 		(*commit)->committer = strdup(s);
435 d1cda826 2017-11-06 stsp 		if ((*commit)->committer == NULL) {
436 d1cda826 2017-11-06 stsp 			err = got_error(GOT_ERR_NO_MEM);
437 d1cda826 2017-11-06 stsp 			goto done;
438 d1cda826 2017-11-06 stsp 		}
439 d1cda826 2017-11-06 stsp 		s += strlen((*commit)->committer) + 1;
440 d1cda826 2017-11-06 stsp 	}
441 d1cda826 2017-11-06 stsp 
442 d1cda826 2017-11-06 stsp 	(*commit)->logmsg = strdup(s);
443 d1cda826 2017-11-06 stsp done:
444 d1cda826 2017-11-06 stsp 	if (err)
445 d1cda826 2017-11-06 stsp 		got_object_commit_close(*commit);
446 0ffeb3c2 2017-11-26 stsp 	return err;
447 0ffeb3c2 2017-11-26 stsp }
448 0ffeb3c2 2017-11-26 stsp 
449 0ffeb3c2 2017-11-26 stsp static void
450 0ffeb3c2 2017-11-26 stsp tree_entry_close(struct got_tree_entry *te)
451 0ffeb3c2 2017-11-26 stsp {
452 0ffeb3c2 2017-11-26 stsp 	free(te->name);
453 0ffeb3c2 2017-11-26 stsp 	free(te);
454 0ffeb3c2 2017-11-26 stsp }
455 0ffeb3c2 2017-11-26 stsp 
456 0ffeb3c2 2017-11-26 stsp static const struct got_error *
457 0ffeb3c2 2017-11-26 stsp parse_tree_entry(struct got_tree_entry **te, size_t *elen, char *buf,
458 0ffeb3c2 2017-11-26 stsp     size_t maxlen)
459 0ffeb3c2 2017-11-26 stsp {
460 0ffeb3c2 2017-11-26 stsp 	char *p = buf, *space;
461 0ffeb3c2 2017-11-26 stsp 	const struct got_error *err = NULL;
462 0ffeb3c2 2017-11-26 stsp 	char hex[SHA1_DIGEST_STRING_LENGTH];
463 0ffeb3c2 2017-11-26 stsp 
464 0ffeb3c2 2017-11-26 stsp 	*te = calloc(1, sizeof(**te));
465 0ffeb3c2 2017-11-26 stsp 	if (*te == NULL)
466 0ffeb3c2 2017-11-26 stsp 		return got_error(GOT_ERR_NO_MEM);
467 0ffeb3c2 2017-11-26 stsp 
468 0ffeb3c2 2017-11-26 stsp 	*elen = strlen(buf) + 1;
469 0ffeb3c2 2017-11-26 stsp 	if (*elen > maxlen) {
470 0ffeb3c2 2017-11-26 stsp 		free(*te);
471 0ffeb3c2 2017-11-26 stsp 		return got_error(GOT_ERR_BAD_OBJ_DATA);
472 0ffeb3c2 2017-11-26 stsp 	}
473 0ffeb3c2 2017-11-26 stsp 
474 0ffeb3c2 2017-11-26 stsp 	space = strchr(buf, ' ');
475 0ffeb3c2 2017-11-26 stsp 	if (space == NULL) {
476 0ffeb3c2 2017-11-26 stsp 		free(*te);
477 0ffeb3c2 2017-11-26 stsp 		return got_error(GOT_ERR_BAD_OBJ_DATA);
478 0ffeb3c2 2017-11-26 stsp 	}
479 0ffeb3c2 2017-11-26 stsp 	while (*p != ' ') {
480 0ffeb3c2 2017-11-26 stsp 		if (*p < '0' && *p > '7') {
481 0ffeb3c2 2017-11-26 stsp 			err = got_error(GOT_ERR_BAD_OBJ_DATA);
482 0ffeb3c2 2017-11-26 stsp 			goto done;
483 0ffeb3c2 2017-11-26 stsp 		}
484 0ffeb3c2 2017-11-26 stsp 		(*te)->mode <<= 3;
485 0ffeb3c2 2017-11-26 stsp 		(*te)->mode |= *p - '0';
486 0ffeb3c2 2017-11-26 stsp 		p++;
487 0ffeb3c2 2017-11-26 stsp 	}
488 0ffeb3c2 2017-11-26 stsp 
489 0ffeb3c2 2017-11-26 stsp 	(*te)->name = strdup(space + 1);
490 0ffeb3c2 2017-11-26 stsp 	if (*elen > maxlen || maxlen - *elen < SHA1_DIGEST_LENGTH) {
491 0ffeb3c2 2017-11-26 stsp 		err = got_error(GOT_ERR_BAD_OBJ_DATA);
492 0ffeb3c2 2017-11-26 stsp 		goto done;
493 0ffeb3c2 2017-11-26 stsp 	}
494 0ffeb3c2 2017-11-26 stsp 	buf += strlen(buf) + 1;
495 0ffeb3c2 2017-11-26 stsp 	memcpy((*te)->id.sha1, buf, SHA1_DIGEST_LENGTH);
496 0ffeb3c2 2017-11-26 stsp 	*elen += SHA1_DIGEST_LENGTH;
497 0ffeb3c2 2017-11-26 stsp done:
498 0ffeb3c2 2017-11-26 stsp 	if (err)
499 0ffeb3c2 2017-11-26 stsp 		tree_entry_close(*te);
500 d1cda826 2017-11-06 stsp 	return err;
501 d1cda826 2017-11-06 stsp }
502 d1cda826 2017-11-06 stsp 
503 d1cda826 2017-11-06 stsp static const struct got_error *
504 0ffeb3c2 2017-11-26 stsp parse_tree_object(struct got_tree_object **tree, struct got_repository *repo,
505 0ffeb3c2 2017-11-26 stsp     char *buf, size_t len)
506 0ffeb3c2 2017-11-26 stsp {
507 0ffeb3c2 2017-11-26 stsp 	size_t remain = len;
508 0ffeb3c2 2017-11-26 stsp 	int nentries;
509 0ffeb3c2 2017-11-26 stsp 
510 0ffeb3c2 2017-11-26 stsp 	*tree = calloc(1, sizeof(**tree));
511 0ffeb3c2 2017-11-26 stsp 	if (*tree == NULL)
512 0ffeb3c2 2017-11-26 stsp 		return got_error(GOT_ERR_NO_MEM);
513 0ffeb3c2 2017-11-26 stsp 
514 0ffeb3c2 2017-11-26 stsp 	SIMPLEQ_INIT(&(*tree)->entries);
515 0ffeb3c2 2017-11-26 stsp 
516 0ffeb3c2 2017-11-26 stsp 	while (remain > 0) {
517 0ffeb3c2 2017-11-26 stsp 		struct got_tree_entry *te;
518 0ffeb3c2 2017-11-26 stsp 		size_t elen;
519 0ffeb3c2 2017-11-26 stsp 
520 0ffeb3c2 2017-11-26 stsp 		parse_tree_entry(&te, &elen, buf, remain);
521 0ffeb3c2 2017-11-26 stsp 		(*tree)->nentries++;
522 0ffeb3c2 2017-11-26 stsp 		SIMPLEQ_INSERT_TAIL(&(*tree)->entries, te, entry);
523 0ffeb3c2 2017-11-26 stsp 		buf += elen;
524 0ffeb3c2 2017-11-26 stsp 		remain -= elen;
525 0ffeb3c2 2017-11-26 stsp 	}
526 0ffeb3c2 2017-11-26 stsp 
527 0ffeb3c2 2017-11-26 stsp 	if (remain != 0) {
528 0ffeb3c2 2017-11-26 stsp 		got_object_tree_close(*tree);
529 0ffeb3c2 2017-11-26 stsp 		return got_error(GOT_ERR_BAD_OBJ_DATA);
530 0ffeb3c2 2017-11-26 stsp 	}
531 0ffeb3c2 2017-11-26 stsp 
532 0ffeb3c2 2017-11-26 stsp 	return NULL;
533 0ffeb3c2 2017-11-26 stsp }
534 0ffeb3c2 2017-11-26 stsp 
535 0ffeb3c2 2017-11-26 stsp static const struct got_error *
536 d1cda826 2017-11-06 stsp read_commit_object(struct got_commit_object **commit,
537 d1cda826 2017-11-06 stsp     struct got_repository *repo, struct got_object *obj, const char *path)
538 d1cda826 2017-11-06 stsp {
539 d1cda826 2017-11-06 stsp 	const struct got_error *err = NULL;
540 d1cda826 2017-11-06 stsp 	FILE *f;
541 d1cda826 2017-11-06 stsp 	struct got_zstream_buf zb;
542 d1cda826 2017-11-06 stsp 	size_t len;
543 d1cda826 2017-11-06 stsp 	char *p;
544 d1cda826 2017-11-06 stsp 	int i, ret;
545 d1cda826 2017-11-06 stsp 
546 d1cda826 2017-11-06 stsp 	f = fopen(path, "rb");
547 d1cda826 2017-11-06 stsp 	if (f == NULL)
548 d1cda826 2017-11-06 stsp 		return got_error(GOT_ERR_BAD_PATH);
549 d1cda826 2017-11-06 stsp 
550 d1cda826 2017-11-06 stsp 	err = inflate_init(&zb, 8192);
551 d1cda826 2017-11-06 stsp 	if (err) {
552 d1cda826 2017-11-06 stsp 		fclose(f);
553 d1cda826 2017-11-06 stsp 		return err;
554 d1cda826 2017-11-06 stsp 	}
555 d1cda826 2017-11-06 stsp 
556 d1cda826 2017-11-06 stsp 	do {
557 d1cda826 2017-11-06 stsp 		err = inflate_read(&zb, f, &len);
558 d1cda826 2017-11-06 stsp 		if (err || len == 0)
559 d1cda826 2017-11-06 stsp 			break;
560 d1cda826 2017-11-06 stsp 	} while (len < obj->hdrlen + obj->size);
561 d1cda826 2017-11-06 stsp 
562 d1cda826 2017-11-06 stsp 	if (len < obj->hdrlen + obj->size) {
563 d1cda826 2017-11-06 stsp 		err = got_error(GOT_ERR_BAD_OBJ_DATA);
564 d1cda826 2017-11-06 stsp 		goto done;
565 d1cda826 2017-11-06 stsp 	}
566 d1cda826 2017-11-06 stsp 
567 d1cda826 2017-11-06 stsp 	/* Skip object header. */
568 d1cda826 2017-11-06 stsp 	len -= obj->hdrlen;
569 d1cda826 2017-11-06 stsp 	err = parse_commit_object(commit, zb.outbuf + obj->hdrlen, len);
570 d1cda826 2017-11-06 stsp done:
571 d1cda826 2017-11-06 stsp 	inflate_end(&zb);
572 d1cda826 2017-11-06 stsp 	fclose(f);
573 d1cda826 2017-11-06 stsp 	return err;
574 d1cda826 2017-11-06 stsp }
575 d1cda826 2017-11-06 stsp 
576 d1cda826 2017-11-06 stsp const struct got_error *
577 d1cda826 2017-11-06 stsp got_object_commit_open(struct got_commit_object **commit,
578 d1cda826 2017-11-06 stsp     struct got_repository *repo, struct got_object *obj)
579 d1cda826 2017-11-06 stsp {
580 d1cda826 2017-11-06 stsp 	const struct got_error *err = NULL;
581 d1cda826 2017-11-06 stsp 	char *path = NULL;
582 d1cda826 2017-11-06 stsp 
583 d1cda826 2017-11-06 stsp 	if (obj->type != GOT_OBJ_TYPE_COMMIT)
584 d1cda826 2017-11-06 stsp 		return got_error(GOT_ERR_OBJ_TYPE);
585 d1cda826 2017-11-06 stsp 
586 d1cda826 2017-11-06 stsp 	err = object_path(&path, &obj->id, repo);
587 d1cda826 2017-11-06 stsp 	if (err)
588 d1cda826 2017-11-06 stsp 		return err;
589 d1cda826 2017-11-06 stsp 
590 d1cda826 2017-11-06 stsp 	err = read_commit_object(commit, repo, obj, path);
591 d1cda826 2017-11-06 stsp 	free(path);
592 d1cda826 2017-11-06 stsp 	return err;
593 d1cda826 2017-11-06 stsp }
594 d1cda826 2017-11-06 stsp 
595 d1cda826 2017-11-06 stsp void
596 d1cda826 2017-11-06 stsp got_object_commit_close(struct got_commit_object *commit)
597 d1cda826 2017-11-06 stsp {
598 d1cda826 2017-11-06 stsp 	struct got_parent_id *pid;
599 d1cda826 2017-11-06 stsp 
600 d1cda826 2017-11-06 stsp 	while (!SIMPLEQ_EMPTY(&commit->parent_ids)) {
601 d1cda826 2017-11-06 stsp 		pid = SIMPLEQ_FIRST(&commit->parent_ids);
602 d1cda826 2017-11-06 stsp 		SIMPLEQ_REMOVE_HEAD(&commit->parent_ids, entry);
603 d1cda826 2017-11-06 stsp 		free(pid);
604 d1cda826 2017-11-06 stsp 	}
605 d1cda826 2017-11-06 stsp 
606 d1cda826 2017-11-06 stsp 	free(commit->author);
607 d1cda826 2017-11-06 stsp 	free(commit->committer);
608 d1cda826 2017-11-06 stsp 	free(commit->logmsg);
609 d1cda826 2017-11-06 stsp 	free(commit);
610 d1cda826 2017-11-06 stsp }
611 0ffeb3c2 2017-11-26 stsp 
612 0ffeb3c2 2017-11-26 stsp static const struct got_error *
613 0ffeb3c2 2017-11-26 stsp read_tree_object(struct got_tree_object **tree,
614 0ffeb3c2 2017-11-26 stsp     struct got_repository *repo, struct got_object *obj, const char *path)
615 0ffeb3c2 2017-11-26 stsp {
616 0ffeb3c2 2017-11-26 stsp 	const struct got_error *err = NULL;
617 0ffeb3c2 2017-11-26 stsp 	FILE *f;
618 0ffeb3c2 2017-11-26 stsp 	struct got_zstream_buf zb;
619 0ffeb3c2 2017-11-26 stsp 	size_t len;
620 0ffeb3c2 2017-11-26 stsp 	char *p;
621 0ffeb3c2 2017-11-26 stsp 	int i, ret;
622 0ffeb3c2 2017-11-26 stsp 
623 0ffeb3c2 2017-11-26 stsp 	f = fopen(path, "rb");
624 0ffeb3c2 2017-11-26 stsp 	if (f == NULL)
625 0ffeb3c2 2017-11-26 stsp 		return got_error(GOT_ERR_BAD_PATH);
626 0ffeb3c2 2017-11-26 stsp 
627 0ffeb3c2 2017-11-26 stsp 	err = inflate_init(&zb, 8192);
628 0ffeb3c2 2017-11-26 stsp 	if (err) {
629 0ffeb3c2 2017-11-26 stsp 		fclose(f);
630 0ffeb3c2 2017-11-26 stsp 		return err;
631 0ffeb3c2 2017-11-26 stsp 	}
632 0ffeb3c2 2017-11-26 stsp 
633 0ffeb3c2 2017-11-26 stsp 	do {
634 0ffeb3c2 2017-11-26 stsp 		err = inflate_read(&zb, f, &len);
635 0ffeb3c2 2017-11-26 stsp 		if (err || len == 0)
636 0ffeb3c2 2017-11-26 stsp 			break;
637 0ffeb3c2 2017-11-26 stsp 	} while (len < obj->hdrlen + obj->size);
638 0ffeb3c2 2017-11-26 stsp 
639 0ffeb3c2 2017-11-26 stsp 	if (len < obj->hdrlen + obj->size) {
640 0ffeb3c2 2017-11-26 stsp 		err = got_error(GOT_ERR_BAD_OBJ_DATA);
641 0ffeb3c2 2017-11-26 stsp 		goto done;
642 0ffeb3c2 2017-11-26 stsp 	}
643 0ffeb3c2 2017-11-26 stsp 
644 0ffeb3c2 2017-11-26 stsp 	/* Skip object header. */
645 0ffeb3c2 2017-11-26 stsp 	len -= obj->hdrlen;
646 0ffeb3c2 2017-11-26 stsp 	err = parse_tree_object(tree, repo, zb.outbuf + obj->hdrlen, len);
647 0ffeb3c2 2017-11-26 stsp done:
648 0ffeb3c2 2017-11-26 stsp 	inflate_end(&zb);
649 0ffeb3c2 2017-11-26 stsp 	fclose(f);
650 0ffeb3c2 2017-11-26 stsp 	return err;
651 0ffeb3c2 2017-11-26 stsp }
652 0ffeb3c2 2017-11-26 stsp 
653 0ffeb3c2 2017-11-26 stsp const struct got_error *
654 0ffeb3c2 2017-11-26 stsp got_object_tree_open(struct got_tree_object **tree,
655 0ffeb3c2 2017-11-26 stsp     struct got_repository *repo, struct got_object *obj)
656 0ffeb3c2 2017-11-26 stsp {
657 0ffeb3c2 2017-11-26 stsp 	const struct got_error *err = NULL;
658 0ffeb3c2 2017-11-26 stsp 	char *path = NULL;
659 0ffeb3c2 2017-11-26 stsp 
660 0ffeb3c2 2017-11-26 stsp 	if (obj->type != GOT_OBJ_TYPE_TREE)
661 0ffeb3c2 2017-11-26 stsp 		return got_error(GOT_ERR_OBJ_TYPE);
662 0ffeb3c2 2017-11-26 stsp 
663 0ffeb3c2 2017-11-26 stsp 	err = object_path(&path, &obj->id, repo);
664 0ffeb3c2 2017-11-26 stsp 	if (err)
665 0ffeb3c2 2017-11-26 stsp 		return err;
666 0ffeb3c2 2017-11-26 stsp 
667 0ffeb3c2 2017-11-26 stsp 	err = read_tree_object(tree, repo, obj, path);
668 0ffeb3c2 2017-11-26 stsp 	free(path);
669 0ffeb3c2 2017-11-26 stsp 	return err;
670 0ffeb3c2 2017-11-26 stsp }
671 0ffeb3c2 2017-11-26 stsp 
672 0ffeb3c2 2017-11-26 stsp void
673 0ffeb3c2 2017-11-26 stsp got_object_tree_close(struct got_tree_object *tree)
674 0ffeb3c2 2017-11-26 stsp {
675 f715ca7f 2017-11-27 stsp 	struct got_tree_entry *te;
676 f715ca7f 2017-11-27 stsp 
677 f715ca7f 2017-11-27 stsp 	while (!SIMPLEQ_EMPTY(&tree->entries)) {
678 f715ca7f 2017-11-27 stsp 		te = SIMPLEQ_FIRST(&tree->entries);
679 f715ca7f 2017-11-27 stsp 		SIMPLEQ_REMOVE_HEAD(&tree->entries, entry);
680 f715ca7f 2017-11-27 stsp 		tree_entry_close(te);
681 f715ca7f 2017-11-27 stsp 	}
682 f715ca7f 2017-11-27 stsp 
683 f715ca7f 2017-11-27 stsp 	free(tree);
684 68482ea3 2017-11-27 stsp }
685 68482ea3 2017-11-27 stsp 
686 68482ea3 2017-11-27 stsp const struct got_error *
687 68482ea3 2017-11-27 stsp got_object_blob_open(struct got_blob_object **blob,
688 68482ea3 2017-11-27 stsp     struct got_repository *repo, struct got_object *obj, size_t blocksize)
689 68482ea3 2017-11-27 stsp {
690 68482ea3 2017-11-27 stsp 	const struct got_error *err = NULL;
691 68482ea3 2017-11-27 stsp 	char *path;
692 68482ea3 2017-11-27 stsp 
693 68482ea3 2017-11-27 stsp 	if (obj->type != GOT_OBJ_TYPE_BLOB)
694 68482ea3 2017-11-27 stsp 		return got_error(GOT_ERR_OBJ_TYPE);
695 68482ea3 2017-11-27 stsp 
696 7d283eee 2017-11-29 stsp 	if (blocksize < obj->hdrlen)
697 7d283eee 2017-11-29 stsp 		return got_error(GOT_ERR_NO_SPACE);
698 7d283eee 2017-11-29 stsp 
699 68482ea3 2017-11-27 stsp 	err = object_path(&path, &obj->id, repo);
700 68482ea3 2017-11-27 stsp 	if (err)
701 68482ea3 2017-11-27 stsp 		return err;
702 68482ea3 2017-11-27 stsp 
703 68482ea3 2017-11-27 stsp 	*blob = calloc(1, sizeof(**blob));
704 68482ea3 2017-11-27 stsp 	if (*blob == NULL) {
705 68482ea3 2017-11-27 stsp 		free(path);
706 68482ea3 2017-11-27 stsp 		return got_error(GOT_ERR_NO_MEM);
707 68482ea3 2017-11-27 stsp 	}
708 68482ea3 2017-11-27 stsp 
709 68482ea3 2017-11-27 stsp 	(*blob)->f = fopen(path, "rb");
710 68482ea3 2017-11-27 stsp 	if ((*blob)->f == NULL) {
711 68482ea3 2017-11-27 stsp 		free(*blob);
712 68482ea3 2017-11-27 stsp 		free(path);
713 68482ea3 2017-11-27 stsp 		return got_error(GOT_ERR_BAD_PATH);
714 68482ea3 2017-11-27 stsp 	}
715 68482ea3 2017-11-27 stsp 
716 68482ea3 2017-11-27 stsp 	err = inflate_init(&(*blob)->zb, blocksize);
717 68482ea3 2017-11-27 stsp 	if (err != NULL) {
718 68482ea3 2017-11-27 stsp 		fclose((*blob)->f);
719 68482ea3 2017-11-27 stsp 		free(*blob);
720 68482ea3 2017-11-27 stsp 		free(path);
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 	free(path);
728 68482ea3 2017-11-27 stsp 	return err;
729 0ffeb3c2 2017-11-26 stsp }
730 68482ea3 2017-11-27 stsp 
731 68482ea3 2017-11-27 stsp void
732 68482ea3 2017-11-27 stsp got_object_blob_close(struct got_blob_object *blob)
733 68482ea3 2017-11-27 stsp {
734 68482ea3 2017-11-27 stsp 	inflate_end(&blob->zb);
735 68482ea3 2017-11-27 stsp 	fclose(blob->f);
736 68482ea3 2017-11-27 stsp 	free(blob);
737 68482ea3 2017-11-27 stsp }
738 68482ea3 2017-11-27 stsp 
739 68482ea3 2017-11-27 stsp const struct got_error *
740 68482ea3 2017-11-27 stsp got_object_blob_read_block(struct got_blob_object *blob, size_t *outlenp)
741 68482ea3 2017-11-27 stsp {
742 68482ea3 2017-11-27 stsp 	return inflate_read(&blob->zb, blob->f, outlenp);
743 68482ea3 2017-11-27 stsp }