Optimize ASCII file reading with EOL format detection and decoding.

1 files changed, 28 insertions, 0 deletions

diff --git a/src/ChangeLog b/src/ChangeLog
index 8ae25e6e612..44e2ff1a1f1 100644
--- a/src/ChangeLog
+++ b/src/ChangeLog
@@ -1,3 +1,31 @@
+2013-03-15  handa  <handa@gnu.org>
+
+        * insdel.c (insert_from_gap): New arg text_at_gap_tail.
+        (adjust_after_replace): Make it back to static.  Delete the third
+        arg text_at_gap_tail.  Cancel the code for handling it.
+
+        * coding.h (struct coding_system): New member eol_seen.
+
+        * coding.c (detect_ascii): New function.
+        (detect_coding): Set coding->head_ascii and coding->eol_seen only
+        when the source bytes are actually scanned.  On detecting for
+        coding_category_utf_8_auto, call detect_ascii instead of scanning
+        source bytes directly.
+        (produce_chars): Call insert_from_gap with the new arg 0.
+        (encode_coding): Likewise.
+        (decode_coding_gap): Control ASCII optimization by the variable
+        disable_ascii_optimization instead of #ifndef .. #endif.
+        Deccode EOL format according to coding->eol_seen.
+        (syms_of_coding): Declare disable-ascii-optimization as a Lisp
+        variable.
+
+        * global.h (struct emacs_globals): New member
+        f_disable_ascii_optimization.
+        (disable_ascii_optimization): New macro.
+
+        * lisp.h (adjust_after_replace): Cancel externing it.
+        (insert_from_gap): Adjust prototype.
+
 2013-03-11  Paul Eggert  <eggert@cs.ucla.edu>
 
         * insdel.c (adjust_after_replace): Use bool for boolean.