D2684: xdiff: remove unused structure and functions

[quark (Jun Wu)]

quark created this revision.
Herald added a subscriber: mercurial-devel.
Herald added a reviewer: hg-reviewers.

REVISION SUMMARY
  `bdiffparam_t` seems unused even in git's repo. `xdl_fall_back_diff` is no
  longer used after https://phab.mercurial-scm.org/D2573.

REPOSITORY
  rHG Mercurial

REVISION DETAIL
  https://phab.mercurial-scm.org/D2684

AFFECTED FILES
  mercurial/thirdparty/xdiff/xdiff.h
  mercurial/thirdparty/xdiff/xutils.c

CHANGE DETAILS

diff --git a/mercurial/thirdparty/xdiff/xutils.c b/mercurial/thirdparty/xdiff/xutils.c
--- a/mercurial/thirdparty/xdiff/xutils.c
+++ b/mercurial/thirdparty/xdiff/xutils.c
@@ -241,34 +241,3 @@
 
 	return 0;
 }
-
-int xdl_fall_back_diff(xdfenv_t *diff_env, xpparam_t const *xpp,
-		int line1, int count1, int line2, int count2)
-{
-	/*
-	 * This probably does not work outside Git, since
-	 * we have a very simple mmfile structure.
-	 *
-	 * Note: ideally, we would reuse the prepared environment, but
-	 * the libxdiff interface does not (yet) allow for diffing only
-	 * ranges of lines instead of the whole files.
-	 */
-	mmfile_t subfile1, subfile2;
-	xdfenv_t env;
-
-	subfile1.ptr = (char *)diff_env->xdf1.recs[line1 - 1]->ptr;
-	subfile1.size = diff_env->xdf1.recs[line1 + count1 - 2]->ptr +
-		diff_env->xdf1.recs[line1 + count1 - 2]->size - subfile1.ptr;
-	subfile2.ptr = (char *)diff_env->xdf2.recs[line2 - 1]->ptr;
-	subfile2.size = diff_env->xdf2.recs[line2 + count2 - 2]->ptr +
-		diff_env->xdf2.recs[line2 + count2 - 2]->size - subfile2.ptr;
-	if (xdl_do_diff(&subfile1, &subfile2, xpp, &env) < 0)
-		return -1;
-
-	memcpy(diff_env->xdf1.rchg + line1 - 1, env.xdf1.rchg, count1);
-	memcpy(diff_env->xdf2.rchg + line2 - 1, env.xdf2.rchg, count2);
-
-	xdl_free_env(&env);
-
-	return 0;
-}
diff --git a/mercurial/thirdparty/xdiff/xdiff.h b/mercurial/thirdparty/xdiff/xdiff.h
--- a/mercurial/thirdparty/xdiff/xdiff.h
+++ b/mercurial/thirdparty/xdiff/xdiff.h
@@ -101,10 +101,6 @@
 	xdl_emit_hunk_consume_func_t hunk_func;
 } xdemitconf_t;
 
-typedef struct s_bdiffparam {
-	long bsize;
-} bdiffparam_t;
-
 
 #define xdl_malloc(x) malloc(x)
 #define xdl_free(ptr) free(ptr)



To: quark, #hg-reviewers
Cc: mercurial-devel