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/*
* 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);
}
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