| History log of /src/lib/libc/string/swab.c |
| Revision | | Date | Author | Comments |
| 1.20 |
| 28-Dec-2022 |
riastradh | swab(3): Rewrite this to be understandable.
And make the tests work, and exercise all lengths up to 100.
Evidently the previous definition, presumably tightly optimized for
1980s-era compilers and CPUs, was too hard to understand, because it
was incorrectly tested for two decades and broken for years.
PR lib/57141
XXX pullup-8
XXX pullup-9
XXX pullup-10
|
| 1.19 |
| 28-Dec-2022 |
kre | PR lib/57141 - never decrement len without actually performing a STEP.
|
| 1.18 |
| 04-Jan-2011 |
martin | branches: 1.18.38; 1.18.48; 1.18.56;
Special-case the (unlikely in practice) call with len = 2 - previously
the code would not have swapped anything. Problem pointed out by
sparc64 automatic test run.
|
| 1.17 |
| 18-Apr-2010 |
apb | The number of byte pairs to swap is len/2, not len/2+1.
|
| 1.16 |
| 18-Apr-2010 |
apb | Bitwise operations on signed types are well-defined if the values
happen to be positive, and indeed the values here were guaranteed
to be positive, but some compilers complained anyway, so convert
the bitwise operations to arithmetic operations.
|
| 1.15 |
| 18-Apr-2010 |
christos | simplify
|
| 1.14 |
| 17-Apr-2010 |
christos | fix lint
|
| 1.13 |
| 17-Apr-2010 |
christos | Change and document for POSIX compliance.
|
| 1.12 |
| 07-Aug-2003 |
agc | Move UCB-licensed code from 4-clause to 3-clause licence.
Patches provided by Joel Baker in PR 22280, verified by myself.
|
| 1.11 |
| 22-May-2001 |
christos | fix incorrect loop sentinel caused by previous de-linting.
|
| 1.10 |
| 26-Jan-2001 |
wiz | branches: 1.10.2;
ANSIfy and de-lint. Reviewed by christos.
|
| 1.9 |
| 20-Sep-1999 |
lukem | back out the #ifdef _DIAGNOSTIC argument checks; too many people complained.
_DIAGASSERT() is still retained.
|
| 1.8 |
| 16-Sep-1999 |
lukem | * use _DIAGASSERT() to check pointer arguments against NULL and file
descriptors against -1 (as appropriate).
* add actual checks which to detect stuff that would trigger_DIAGASSERT(),
and attempt to return a sane error condition.
* knf some code
* remove some `register' decls.
the first two items result in the addition of code similar to the
following in various functions:
_DIAGASSERT(path != NULL)
#ifdef _DIAGNOSTIC
if (path == NULL) {
errno = EFAULT;
return (-1);
}
#endif
|
| 1.7 |
| 03-Feb-1998 |
perry | remove obsolete register declarations
|
| 1.6 |
| 30-Jan-1998 |
perry | update to lite-2
|
| 1.5 |
| 12-Jan-1998 |
kleink | Per XPG4, move the prototype of swab() from <string.h> to <unistd.h>.
|
| 1.4 |
| 13-Jul-1997 |
christos | Fix RCSID's
Use "extern.h" where appropriate.
|
| 1.3 |
| 26-Aug-1993 |
jtc | branches: 1.3.8;
Declare rcsid strings so they are stored in text segment.
|
| 1.2 |
| 01-Aug-1993 |
mycroft | Add RCS identifiers.
|
| 1.1 |
| 21-Mar-1993 |
cgd | branches: 1.1.1;
Initial revision
|
| 1.1.1.2 |
| 30-Jan-1998 |
perry | import lite-2
|
| 1.1.1.1 |
| 21-Mar-1993 |
cgd | initial import of 386bsd-0.1 sources
|
| 1.3.8.1 |
| 20-Sep-1996 |
jtc | snapshot namespace cleanup: net, etc.
|
| 1.10.2.1 |
| 08-Oct-2001 |
nathanw | Catch up to -current.
|
| 1.18.56.1 |
| 22-Feb-2023 |
martin | Pull up following revision(s) (requested by riastradh in ticket #98):
tests/lib/libc/string/t_swab.c: revision 1.3
lib/libc/string/swab.c: revision 1.20
swab(3): Rewrite this to be understandable.
And make the tests work, and exercise all lengths up to 100.
Evidently the previous definition, presumably tightly optimized for
1980s-era compilers and CPUs, was too hard to understand, because it
was incorrectly tested for two decades and broken for years.
PR lib/57141
|
| 1.18.48.1 |
| 22-Feb-2023 |
martin | Pull up following revision(s) (requested by riastradh in ticket #1601):
tests/lib/libc/string/t_swab.c: revision 1.3
lib/libc/string/swab.c: revision 1.20
swab(3): Rewrite this to be understandable.
And make the tests work, and exercise all lengths up to 100.
Evidently the previous definition, presumably tightly optimized for
1980s-era compilers and CPUs, was too hard to understand, because it
was incorrectly tested for two decades and broken for years.
PR lib/57141
|
| 1.18.38.1 |
| 22-Feb-2023 |
martin | Pull up following revision(s) (requested by riastradh in ticket #1798):
tests/lib/libc/string/t_swab.c: revision 1.3
lib/libc/string/swab.c: revision 1.20
swab(3): Rewrite this to be understandable.
And make the tests work, and exercise all lengths up to 100.
Evidently the previous definition, presumably tightly optimized for
1980s-era compilers and CPUs, was too hard to understand, because it
was incorrectly tested for two decades and broken for years.
PR lib/57141
|
