upstream/opnsense-src
1
0
Fork 0
mirror of https://github.com/opnsense/src.git synced 2026-06-10 09:11:07 -04:00
Code Issues Projects Releases Packages Wiki Activity Actions
opnsense-src/lib/libc/string
History
Ed Maste 7dbcd06e63 libc: optimize memmem two-way bad character shift 
first, the condition (mem && k < p) is redundant, because mem being
nonzero implies the needle is periodic with period exactly p, in which
case any byte that appears in the needle must appear in the last p
bytes of the needle, bounding the shift (k) by p.

second, the whole point of replacing the shift k by mem (=l-p) is to
prevent shifting by less than mem when discarding the memory on shift,
in which case linear time could not be guaranteed. but as written, the
check also replaced shifts greater than mem by mem, reducing the
benefit of the shift. there is no possible benefit to this reduction of
the shift; since mem is being cleared, the full shift is valid and
more optimal. so only replace the shift by mem when it would be less
than mem.

musl commits:
8f5a820d147da36bcdbddd201b35d293699dacd8
122d67f846cb0be2c9e1c3880db9eb9545bbe38c

Obtained from:	musl
MFC after:	2 weeks
2020-11-19 00:02:12 +00:00
..
bcmp.3 Add timingsafe_bcmp and timingsafe_memcmp. 2016-08-14 23:38:50 +00:00
bcmp.c General further adoption of SPDX licensing ID tags. 2017-11-20 19:49:47 +00:00
bcopy.3 Fix spelling. 2015-08-24 01:53:18 +00:00
bcopy.c General further adoption of SPDX licensing ID tags. 2017-11-20 19:49:47 +00:00
bstring.3 Renumber clauses to reduce diffs to other versions 2013-05-28 20:57:40 +00:00
bzero.3 Update bzero(3) manpage to following the Posix Standard. 2015-08-24 01:51:10 +00:00
bzero.c Fix the style of the SCM ID's. 2002-03-22 21:53:29 +00:00
ffs.3 Document bitset(9) 2015-10-17 19:55:58 +00:00
ffs.c General further adoption of SPDX licensing ID tags. 2017-11-20 19:49:47 +00:00
ffsl.c General further adoption of SPDX licensing ID tags. 2017-11-20 19:49:47 +00:00
ffsll.c General further adoption of SPDX licensing ID tags. 2017-11-20 19:49:47 +00:00
fls.c General further adoption of SPDX licensing ID tags. 2017-11-20 19:49:47 +00:00
flsl.c General further adoption of SPDX licensing ID tags. 2017-11-20 19:49:47 +00:00
flsll.c General further adoption of SPDX licensing ID tags. 2017-11-20 19:49:47 +00:00
index.3 Renumber clauses to reduce diffs to other versions 2013-05-28 20:57:40 +00:00
Makefile.inc Document memset_s(3). memset_s(3) is defined in 2018-02-16 05:48:45 +00:00
memccpy.3 Renumber clauses to reduce diffs to other versions 2013-05-28 20:57:40 +00:00
memccpy.c General further adoption of SPDX licensing ID tags. 2017-11-20 19:49:47 +00:00
memchr.3 Renumber clauses to reduce diffs to other versions 2013-05-28 20:57:40 +00:00
memchr.c clang-format libc string functions imported from musl 2020-11-18 22:01:34 +00:00
memcmp.3 Add timingsafe_bcmp and timingsafe_memcmp. 2016-08-14 23:38:50 +00:00
memcmp.c General further adoption of SPDX licensing ID tags. 2017-11-20 19:49:47 +00:00
memcpy.3 Add notes about overlapping copies. 2017-11-13 17:04:44 +00:00
memcpy.c Fix the style of the SCM ID's. 2002-03-22 21:53:29 +00:00
memmem.3 libc: Use musl's O(n) memmem and strstr 2017-03-18 00:51:39 +00:00
memmem.c libc: optimize memmem two-way bad character shift 2020-11-19 00:02:12 +00:00
memmove.3 Renumber clauses to reduce diffs to other versions 2013-05-28 20:57:40 +00:00
memmove.c Fix the style of the SCM ID's. 2002-03-22 21:53:29 +00:00
memrchr.c Add memrchr(3). 2008-04-10 00:12:44 +00:00
memset.3 memset.3: better fix previous typo 2020-02-08 21:17:48 +00:00
memset.c General further adoption of SPDX licensing ID tags. 2017-11-20 19:49:47 +00:00
memset_s.c Improve standard compliance for memset_s() and abort_handler_s(). 2017-08-12 15:18:17 +00:00
stpcpy.c General further adoption of SPDX licensing ID tags. 2017-11-20 19:49:47 +00:00
stpncpy.c libc: further adoption of SPDX licensing ID tags. 2017-11-25 17:12:48 +00:00
strcasecmp.3 Fix strcasecmp_l() and strncasecmp_l() POSIX 2008 compliance. 2014-05-30 01:09:07 +00:00
strcasecmp.c General further adoption of SPDX licensing ID tags. 2017-11-20 19:49:47 +00:00
strcasestr.c General further adoption of SPDX licensing ID tags. 2017-11-20 19:49:47 +00:00
strcat.3 Add notes about overlapping copies. 2017-11-13 17:04:44 +00:00
strcat.c General further adoption of SPDX licensing ID tags. 2017-11-20 19:49:47 +00:00
strchr.3 strchr(3): Mdoc fixes. 2015-06-04 21:54:46 +00:00
strchr.c General further adoption of SPDX licensing ID tags. 2017-11-20 19:49:47 +00:00
strchrnul.c Remove "all rights reserved" on files where I have copyright. 2018-05-09 17:06:52 +00:00
strcmp.3 Renumber clauses to reduce diffs to other versions 2013-05-28 20:57:40 +00:00
strcmp.c General further adoption of SPDX licensing ID tags. 2017-11-20 19:49:47 +00:00
strcoll.3 Renumber clauses to reduce diffs to other versions 2013-05-28 20:57:40 +00:00
strcoll.c libc: further adoption of SPDX licensing ID tags. 2017-11-25 17:12:48 +00:00
strcpy.3 strcpy.3: Improve legibility and clarity 2018-06-06 20:09:21 +00:00
strcpy.c [PPC64] strcpy optimization 2020-01-15 19:46:01 +00:00
strcspn.c libc: further adoption of SPDX licensing ID tags. 2017-11-25 17:12:48 +00:00
strdup.3 strdup.3: Slightly canonicalize OOM return/error status 2020-05-05 17:57:04 +00:00
strdup.c General further adoption of SPDX licensing ID tags. 2017-11-20 19:49:47 +00:00
strerror.3 use .Mt to mark up email addresses consistently (part4) 2014-06-23 08:25:03 +00:00
strerror.c Fix WITHOUT_NLS build after r342551. 2018-12-28 16:08:49 +00:00
string.3 Renumber clauses to reduce diffs to other versions 2013-05-28 20:57:40 +00:00
strlcat.c Make strlcpy/strlcat slightly easier to read. 2015-04-06 03:21:22 +00:00
strlcpy.3 libc manpages: various improvements from NetBSD 2020-06-14 05:59:30 +00:00
strlcpy.c Make strlcpy/strlcat slightly easier to read. 2015-04-06 03:21:22 +00:00
strlen.3 Don't put multiple names on a single .Nm line. This fixes apropos(1) 2018-04-17 09:05:46 +00:00
strlen.c Remove "All rights reserved" from my files. 2018-05-10 06:41:08 +00:00
strmode.3 Renumber clauses to reduce diffs to other versions 2013-05-28 20:57:40 +00:00
strmode.c General further adoption of SPDX licensing ID tags. 2017-11-20 19:49:47 +00:00
strncat.c General further adoption of SPDX licensing ID tags. 2017-11-20 19:49:47 +00:00
strncmp.c General further adoption of SPDX licensing ID tags. 2017-11-20 19:49:47 +00:00
strncpy.c [PPC64] strncpy optimization 2020-01-15 19:53:03 +00:00
strndup.c Replace strndup with OpenBSD's implementation. 2015-08-26 23:28:10 +00:00
strnlen.c libc: further adoption of SPDX licensing ID tags. 2017-11-25 17:12:48 +00:00
strnstr.c General further adoption of SPDX licensing ID tags. 2017-11-20 19:49:47 +00:00
strpbrk.3 Renumber clauses to reduce diffs to other versions 2013-05-28 20:57:40 +00:00
strpbrk.c General further adoption of SPDX licensing ID tags. 2017-11-20 19:49:47 +00:00
strrchr.c General further adoption of SPDX licensing ID tags. 2017-11-20 19:49:47 +00:00
strsep.3 strsep.3: don't silently ignore errors 2018-05-28 18:29:15 +00:00
strsep.c General further adoption of SPDX licensing ID tags. 2017-11-20 19:49:47 +00:00
strsignal.c General further adoption of SPDX licensing ID tags. 2017-11-20 19:49:47 +00:00
strspn.3 Various mdoc fixes and a few EOL whitespace removals. 2014-12-21 12:36:36 +00:00
strspn.c libc: further adoption of SPDX licensing ID tags. 2017-11-25 17:12:48 +00:00
strstr.3 Renumber clauses to reduce diffs to other versions 2013-05-28 20:57:40 +00:00
strstr.c clang-format libc string functions imported from musl 2020-11-18 22:01:34 +00:00
strtok.3 strtok(3): make it easier to find the RETURN VALUES section 2020-06-22 11:03:36 +00:00
strtok.c General further adoption of SPDX licensing ID tags. 2017-11-20 19:49:47 +00:00
strxfrm.3 Renumber clauses to reduce diffs to other versions 2013-05-28 20:57:40 +00:00
strxfrm.c libc: further adoption of SPDX licensing ID tags. 2017-11-25 17:12:48 +00:00
swab.3 Renumber clauses to reduce diffs to other versions 2013-05-28 20:57:40 +00:00
swab.c General further adoption of SPDX licensing ID tags. 2017-11-20 19:49:47 +00:00
Symbol.map Implement the memset_s(3) function as specified by the C11 ISO/IEC 2017-03-30 04:57:26 +00:00
timingsafe_bcmp.3 Add timingsafe_bcmp and timingsafe_memcmp. 2016-08-14 23:38:50 +00:00
timingsafe_bcmp.c Add timingsafe_bcmp and timingsafe_memcmp. 2016-08-14 23:38:50 +00:00
timingsafe_memcmp.c Add timingsafe_bcmp and timingsafe_memcmp. 2016-08-14 23:38:50 +00:00
wcpcpy.c General further adoption of SPDX licensing ID tags. 2017-11-20 19:49:47 +00:00
wcpncpy.c libc: further adoption of SPDX licensing ID tags. 2017-11-25 17:12:48 +00:00
wcscasecmp.c libc: further adoption of SPDX licensing ID tags. 2017-11-25 17:12:48 +00:00
wcscat.c libc: further adoption of SPDX licensing ID tags. 2017-11-25 17:12:48 +00:00
wcschr.c libc: further adoption of SPDX licensing ID tags. 2017-11-25 17:12:48 +00:00
wcscmp.c General further adoption of SPDX licensing ID tags. 2017-11-20 19:49:47 +00:00
wcscoll.3 Renumber clauses to reduce diffs to other versions 2013-05-28 20:57:40 +00:00
wcscoll.c libc: further adoption of SPDX licensing ID tags. 2017-11-25 17:12:48 +00:00
wcscpy.c libc: further adoption of SPDX licensing ID tags. 2017-11-25 17:12:48 +00:00
wcscspn.c libc: further adoption of SPDX licensing ID tags. 2017-11-25 17:12:48 +00:00
wcsdup.c libc: further adoption of SPDX licensing ID tags. 2017-11-25 17:12:48 +00:00
wcslcat.c libc: further adoption of SPDX licensing ID tags. 2017-11-25 17:12:48 +00:00
wcslcpy.c libc: further adoption of SPDX licensing ID tags. 2017-11-25 17:12:48 +00:00
wcslen.c libc: further adoption of SPDX licensing ID tags. 2017-11-25 17:12:48 +00:00
wcsncasecmp.c libc: further adoption of SPDX licensing ID tags. 2017-11-25 17:12:48 +00:00
wcsncat.c libc: further adoption of SPDX licensing ID tags. 2017-11-25 17:12:48 +00:00
wcsncmp.c General further adoption of SPDX licensing ID tags. 2017-11-20 19:49:47 +00:00
wcsncpy.c General further adoption of SPDX licensing ID tags. 2017-11-20 19:49:47 +00:00
wcsnlen.c libc: further adoption of SPDX licensing ID tags. 2017-11-25 17:12:48 +00:00
wcspbrk.c libc: further adoption of SPDX licensing ID tags. 2017-11-25 17:12:48 +00:00
wcsrchr.c libc: further adoption of SPDX licensing ID tags. 2017-11-25 17:12:48 +00:00
wcsspn.c libc: further adoption of SPDX licensing ID tags. 2017-11-25 17:12:48 +00:00
wcsstr.c General further adoption of SPDX licensing ID tags. 2017-11-20 19:49:47 +00:00
wcstok.3 Remove stray comma at the end of the See Also list. 2002-10-15 09:49:54 +00:00
wcstok.c General further adoption of SPDX licensing ID tags. 2017-11-20 19:49:47 +00:00
wcswidth.3 mdoc(7) police: tiny nits. 2002-12-09 14:04:05 +00:00
wcswidth.c General further adoption of SPDX licensing ID tags. 2017-11-20 19:49:47 +00:00
wcsxfrm.3 Renumber clauses to reduce diffs to other versions 2013-05-28 20:57:40 +00:00
wcsxfrm.c Fix a possible segfault in wcsxfrm(3) and wcsxfrm_l(3). 2019-08-07 20:13:43 +00:00
wmemchr.3 Renumber clauses to reduce diffs to other versions 2013-05-28 20:57:40 +00:00
wmemchr.c libc: further adoption of SPDX licensing ID tags. 2017-11-25 17:12:48 +00:00
wmemcmp.c libc: further adoption of SPDX licensing ID tags. 2017-11-25 17:12:48 +00:00
wmemcpy.c libc: further adoption of SPDX licensing ID tags. 2017-11-25 17:12:48 +00:00
wmemmove.c libc: further adoption of SPDX licensing ID tags. 2017-11-25 17:12:48 +00:00
wmemset.c libc: further adoption of SPDX licensing ID tags. 2017-11-25 17:12:48 +00:00