C++ (Cpp) _alpm_shortest_delta_path Examples

Example #1

File: sync.c Project: matthewbauer/unipkg-pacman

/** Compute the size of the files that will be downloaded to install a
 * package.
 * @param newpkg the new package to upgrade to
 */
static int compute_download_size(alpm_pkg_t *newpkg)
{
	const char *fname;
	char *fpath;
	off_t size = 0;
	alpm_handle_t *handle = newpkg->handle;

	if(newpkg->origin != PKG_FROM_SYNCDB) {
		newpkg->infolevel |= INFRQ_DSIZE;
		newpkg->download_size = 0;
		return 0;
	}

	fname = alpm_pkg_get_filename(newpkg);
	ASSERT(fname != NULL, RET_ERR(handle, ALPM_ERR_PKG_INVALID_NAME, -1));
	fpath = _alpm_filecache_find(handle, fname);

	if(fpath) {
		FREE(fpath);
		size = 0;
	} else if(handle->usedelta) {
		off_t dltsize;
		off_t pkgsize = alpm_pkg_get_size(newpkg);

		dltsize = _alpm_shortest_delta_path(handle,
			alpm_pkg_get_deltas(newpkg),
			alpm_pkg_get_filename(newpkg),
			&newpkg->delta_path);

		if(newpkg->delta_path && (dltsize < pkgsize * MAX_DELTA_RATIO)) {
			_alpm_log(handle, ALPM_LOG_DEBUG, "using delta size\n");
			size = dltsize;
		} else {
			_alpm_log(handle, ALPM_LOG_DEBUG, "using package size\n");
			size = alpm_pkg_get_size(newpkg);
			alpm_list_free(newpkg->delta_path);
			newpkg->delta_path = NULL;
		}
	} else {
		size = alpm_pkg_get_size(newpkg);
	}

	_alpm_log(handle, ALPM_LOG_DEBUG, "setting download size %jd for pkg %s\n",
			(intmax_t)size, alpm_pkg_get_name(newpkg));

	newpkg->infolevel |= INFRQ_DSIZE;
	newpkg->download_size = size;
	return 0;
}

Example #2

File: sync.c Project: danilogr/MSYS2-pacman

/** Compute the size of the files that will be downloaded to install a
 * package.
 * @param newpkg the new package to upgrade to
 */
static int compute_download_size(alpm_pkg_t *newpkg)
{
	const char *fname;
	char *fpath, *fnamepart = NULL;
	off_t size = 0;
	alpm_handle_t *handle = newpkg->handle;
	int ret = 0;

	if(newpkg->origin != ALPM_PKG_FROM_SYNCDB) {
		newpkg->infolevel |= INFRQ_DSIZE;
		newpkg->download_size = 0;
		return 0;
	}

	ASSERT(newpkg->filename != NULL, RET_ERR(handle, ALPM_ERR_PKG_INVALID_NAME, -1));
	fname = newpkg->filename;
	fpath = _alpm_filecache_find(handle, fname);

	/* downloaded file exists, so there's nothing to grab */
	if(fpath) {
		size = 0;
		goto finish;
	}

	CALLOC(fnamepart, strlen(fname) + 6, sizeof(char), return -1);
	sprintf(fnamepart, "%s.part", fname);
	fpath = _alpm_filecache_find(handle, fnamepart);
	if(fpath) {
		struct stat st;
		if(stat(fpath, &st) == 0) {
			/* subtract the size of the .part file */
			_alpm_log(handle, ALPM_LOG_DEBUG, "using (package - .part) size\n");
			size = newpkg->size - st.st_size;
			size = size < 0 ? 0 : size;
		}

		/* tell the caller that we have a partial */
		ret = 1;
	} else if(handle->deltaratio > 0.0) {
		off_t dltsize;

		dltsize = _alpm_shortest_delta_path(handle, newpkg->deltas,
				newpkg->filename, &newpkg->delta_path);

		if(newpkg->delta_path && (dltsize < newpkg->size * handle->deltaratio)) {
			_alpm_log(handle, ALPM_LOG_DEBUG, "using delta size\n");
			size = dltsize;
		} else {
			_alpm_log(handle, ALPM_LOG_DEBUG, "using package size\n");
			size = newpkg->size;
			alpm_list_free(newpkg->delta_path);
			newpkg->delta_path = NULL;
		}
	} else {
		size = newpkg->size;
	}

finish:
	_alpm_log(handle, ALPM_LOG_DEBUG, "setting download size %jd for pkg %s\n",
			(intmax_t)size, newpkg->name);

	newpkg->infolevel |= INFRQ_DSIZE;
	newpkg->download_size = size;

	FREE(fpath);
	FREE(fnamepart);

	return ret;
}