Allow UseDelta option to specify a delta ratio

Rework the frontend and backend to allow passing a ratio value in for
UseDelta rather than having a hardcoded #define-d 0.7 value always used.
This is useful for those with fast connections, who would likely benefit
from tuning this ratio to lower values; it is also useful for general
testing purposes.

The libalpm API changes for this, but we do support the old config file
format with a no-value 'UseDelta' option; in this case we simply use the
old default of 0.7.

We clamp the ratio values to a sane range between 0.0 and 2.0, allowing
ratios above 1.0 for testing purposes.

Signed-off-by: Dan McGee <dan@archlinux.org>

1 files changed, 0 insertions, 3 deletions

diff --git a/lib/libalpm/delta.h b/lib/libalpm/delta.h
index 1173ddfe..37f208b0 100644
--- a/lib/libalpm/delta.h
+++ b/lib/libalpm/delta.h
@@ -30,9 +30,6 @@ alpm_delta_t *_alpm_delta_dup(const alpm_delta_t *delta);
 off_t _alpm_shortest_delta_path(alpm_handle_t *handle, alpm_list_t *deltas,
 		const char *to, alpm_list_t **path);
 
-/* max percent of package size to download deltas */
-#define MAX_DELTA_RATIO 0.7
-
 #endif /* _ALPM_DELTA_H */
 
 /* vim: set ts=2 sw=2 noet: */