diff options
| -rw-r--r-- | include/git2.h | 1 | ||||
| -rw-r--r-- | include/git2/indexer.h | 15 | ||||
| -rw-r--r-- | src/indexer.c | 133 |
3 files changed, 149 insertions, 0 deletions
diff --git a/include/git2.h b/include/git2.h index 35e48b240..96de524e7 100644 --- a/include/git2.h +++ b/include/git2.h @@ -60,5 +60,6 @@ #include "git2/net.h" #include "git2/transport.h" #include "git2/status.h" +#include "git2/indexer.h" #endif diff --git a/include/git2/indexer.h b/include/git2/indexer.h new file mode 100644 index 000000000..be1752027 --- /dev/null +++ b/include/git2/indexer.h @@ -0,0 +1,15 @@ +#ifndef _INCLUDE_git_indexer_h__ +#define _INCLUDE_git_indexer_h__ + +typedef struct git_pack_indexer { + struct pack_file *pack; + git_vector objects; + git_vector deltas; + struct stat st; +} git_pack_indexer; + +GIT_EXTERN(int) git_pack_indexer_new(git_pack_indexer **out, const char *packname); +GIT_EXTERN(void) git_pack_indexer_free(git_pack_indexer *idx) + + +#endif diff --git a/src/indexer.c b/src/indexer.c new file mode 100644 index 000000000..b63efc088 --- /dev/null +++ b/src/indexer.c @@ -0,0 +1,133 @@ +/* + * This file is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License, version 2, + * as published by the Free Software Foundation. + * + * In addition to the permissions in the GNU General Public License, + * the authors give you unlimited permission to link the compiled + * version of this file into combinations with other programs, + * and to distribute those combinations without any restriction + * coming from the use of this file. (The General Public License + * restrictions do apply in other respects; for example, they cover + * modification of the file, and distribution when not linked into + * a combined executable.) + * + * This file is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; see the file COPYING. If not, write to + * the Free Software Foundation, 51 Franklin Street, Fifth Floor, + * Boston, MA 02110-1301, USA. + */ + +#include "common.h" +#include "pack.h" +#include "posix.h" + +static int parse_header(git_pack_indexer *idx) +{ + struct pack_header hdr; + int error; + + /* Verify we recognize this pack file format. */ + if ((error = p_read(idx->pack->pack_fd, &hdr, sizeof(hdr))) < GIT_SUCCESS) + goto cleanup; + + if (hdr.hdr_signature != htonl(PACK_SIGNATURE)) { + error = git__throw(GIT_EOBJCORRUPTED, "Wrong pack signature"); + goto cleanup; + } + + if (!pack_version_ok(hdr.hdr_version)) { + error = git__throw(GIT_EOBJCORRUPTED, "Wrong pack version"); + goto cleanup; + } + + /* + * FIXME: At this point we have no idea how many of the are + * deltas, so assume all objects are both until we get a better + * idea + */ + error = git_vector_init(&idx->objects, hdr.hdr_entries, NULL /* FIXME: probably need something */); + if (error < GIT_SUCCESS) + goto cleanup; + + error = git_vector_init(&idx->deltas, hdr.hdr_entries, NULL /* FIXME: probably need something */); + if (error < GIT_SUCCESS) + goto cleanup; + + return GIT_SUCCESS; + +cleanup: + git_vector_free(&idx->objects); + git_vector_free(&idx->deltas); + + return error; +} + +int git_pack_indexer_new(git_pack_indexer **out, const char *packname) +{ + struct git_pack_indexer *idx; + unsigned int namelen; + int ret, error; + + idx = git__malloc(sizeof(struct git_pack_indexer)); + if (idx == NULL) + return GIT_ENOMEM; + + memset(idx, 0x0, sizeof(*idx)); + + namelen = strlen(packname); + idx->pack = git__malloc(sizeof(struct pack_file) + namelen + 1); + if (idx->pack == NULL) + goto cleanup; + + memset(idx->pack, 0x0, sizeof(struct pack_file)); + memcpy(idx->pack->pack_name, packname, namelen); + + ret = p_stat(packname, &idx->st); + if (ret < 0) { + if (errno == ENOENT) + error = git__throw(GIT_ENOTFOUND, "Failed to stat packfile. File not found"); + else + error = git__throw(GIT_EOSERR, "Failed to stat packfile."); + + goto cleanup; + } + + ret = p_open(idx->pack->pack_name, O_RDONLY); + if (ret < 0) { + error = git__throw(GIT_EOSERR, "Failed to open packfile"); + goto cleanup; + } + + idx->pack->pack_fd = ret; + + error = parse_header(idx); + if (error < GIT_SUCCESS) { + error = git__rethrow(error, "Failed to parse packfile header"); + goto cleanup; + } + + *out = idx; + + return GIT_SUCCESS; + +cleanup: + free(idx->pack); + free(idx); + + return error; +} + +void git_pack_indexer_free(git_pack_indexer *idx) +{ + p_close(idx->pack->pack_fd); + git_vector_free(&idx->objects); + git_vector_free(&idx->deltas); + free(idx->pack); + free(idx); +} |