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