* image.c: Shrink memory needed for animation cache.

(SIGNATURE_DIGESTSIZE): New constant.
(struct animation_cache): Make 'signature' a fixed size array of bytes.
(imagemagick_create_cache): Copy the signature.  This saves
several KB of memory that ImageMagick wastes per signature.
Don't bother updating the update_time, as the caller does that now.
(imagemagick_prune_animation_cache): Don't destroy the signature, as
it's a fixed size struct member now.
(imagemagick_get_animation_cache): Always destroy the signature,
as it's now imagemagick_create_cache's responsibility to copy it.
Avoid duplicate calls to strcmp and to imagemagick_create_cache,
and use memcmp rather than strcmp.
eassert that ImageMagick returns a signature of the specified length.

1 files changed, 16 insertions, 0 deletions

diff --git a/src/ChangeLog b/src/ChangeLog
index 2171f2b8748..d0bafd3914e 100644
--- a/src/ChangeLog
+++ b/src/ChangeLog
@@ -1,3 +1,19 @@
+2013-08-19  Paul Eggert  <eggert@cs.ucla.edu>
+
+        * image.c: Shrink memory needed for animation cache.
+        (SIGNATURE_DIGESTSIZE): New constant.
+        (struct animation_cache): Make 'signature' a fixed size array of bytes.
+        (imagemagick_create_cache): Copy the signature.  This saves
+        several KB of memory that ImageMagick wastes per signature.
+        Don't bother updating the update_time, as the caller does that now.
+        (imagemagick_prune_animation_cache): Don't destroy the signature, as
+        it's a fixed size struct member now.
+        (imagemagick_get_animation_cache): Always destroy the signature,
+        as it's now imagemagick_create_cache's responsibility to copy it.
+        Avoid duplicate calls to strcmp and to imagemagick_create_cache,
+        and use memcmp rather than strcmp.
+        eassert that ImageMagick returns a signature of the specified length.
+
 2013-08-19  Lars Magne Ingebrigtsen  <larsi@gnus.org>
 
         * image.c (imagemagick_get_animation_cache): Don't segfault on