libs/newlib-cygwin
libs
/
newlib-cygwin
mirror of git://sourceware.org/git/newlib-cygwin.git
4
0
Fork 0
Code Issues Projects Releases Wiki Activity

Remove from RB_REMOVE_COLOR some null checks 

where the pointer checked is provably never null. Restructure the surrounding
code just enough to make the non-nullness obvious.

Reviewed by:	markj
Tested by:	pho
Differential Revision:	https://reviews.freebsd.org/D25089
This commit is contained in:
dougm 2020-06-02 17:18:16 +00:00 committed by Sebastian Huber
parent 640a96a231
commit 123df813ee
1 changed files with 20 additions and 26 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

46
newlib/libc/include/sys/tree.h
View File

@ -493,26 +493,23 @@ name##_RB_REMOVE_COLOR(struct name *head, struct type *parent) \
RB_ROTATE_LEFT(head, parent, tmp, field);\
tmp = RB_RIGHT(parent, field); \
} \
if (!RB_ISRED(RB_LEFT(tmp, field), field) && \
!RB_ISRED(RB_RIGHT(tmp, field), field)) { \
if (RB_ISRED(RB_LEFT(tmp, field), field)) { \
struct type *oleft; \
oleft = RB_LEFT(tmp, field); \
RB_COLOR(oleft, field) = RB_BLACK; \
RB_COLOR(tmp, field) = RB_RED; \
RB_ROTATE_RIGHT(head, tmp, oleft, field); \
tmp = RB_RIGHT(parent, field); \
} else if (!RB_ISRED(RB_RIGHT(tmp, field), field)) { \
RB_COLOR(tmp, field) = RB_RED; \
elm = parent; \
parent = RB_PARENT(elm, field); \
continue; \
} \
if (!RB_ISRED(RB_RIGHT(tmp, field), field)) { \
struct type *oleft; \
if ((oleft = RB_LEFT(tmp, field)) \
!= NULL) \
RB_COLOR(oleft, field) = RB_BLACK; \
RB_COLOR(tmp, field) = RB_RED; \
RB_ROTATE_RIGHT(head, tmp, oleft, field); \
tmp = RB_RIGHT(parent, field); \
} \
if (RB_ISRED(RB_RIGHT(tmp, field), field)) \
RB_COLOR(RB_RIGHT(tmp, field), field) = RB_BLACK; \
RB_COLOR(tmp, field) = RB_COLOR(parent, field); \
RB_COLOR(parent, field) = RB_BLACK; \
if (RB_RIGHT(tmp, field)) \
RB_COLOR(RB_RIGHT(tmp, field), field) = RB_BLACK; \
RB_ROTATE_LEFT(head, parent, tmp, field); \
elm = RB_ROOT(head); \
break; \
@ -523,26 +520,23 @@ name##_RB_REMOVE_COLOR(struct name *head, struct type *parent) \
RB_ROTATE_RIGHT(head, parent, tmp, field);\
tmp = RB_LEFT(parent, field); \
} \
if (!RB_ISRED(RB_LEFT(tmp, field), field) && \
!RB_ISRED(RB_RIGHT(tmp, field), field)) { \
if (RB_ISRED(RB_RIGHT(tmp, field), field)) { \
struct type *oright; \
oright = RB_RIGHT(tmp, field); \
RB_COLOR(oright, field) = RB_BLACK; \
RB_COLOR(tmp, field) = RB_RED; \
RB_ROTATE_LEFT(head, tmp, oright, field); \
tmp = RB_LEFT(parent, field); \
} else if (!RB_ISRED(RB_LEFT(tmp, field), field)) { \
RB_COLOR(tmp, field) = RB_RED; \
elm = parent; \
parent = RB_PARENT(elm, field); \
continue; \
} \
if (!RB_ISRED(RB_LEFT(tmp, field), field)) { \
struct type *oright; \
if ((oright = RB_RIGHT(tmp, field)) \
!= NULL) \
RB_COLOR(oright, field) = RB_BLACK; \
RB_COLOR(tmp, field) = RB_RED; \
RB_ROTATE_LEFT(head, tmp, oright, field); \
tmp = RB_LEFT(parent, field); \
} \
if (RB_ISRED(RB_LEFT(tmp, field), field)) \
RB_COLOR(RB_LEFT(tmp, field), field) = RB_BLACK; \
RB_COLOR(tmp, field) = RB_COLOR(parent, field); \
RB_COLOR(parent, field) = RB_BLACK; \
if (RB_LEFT(tmp, field)) \
RB_COLOR(RB_LEFT(tmp, field), field) = RB_BLACK; \
RB_ROTATE_RIGHT(head, parent, tmp, field); \
elm = RB_ROOT(head); \
break; \