5abf82e236
Id -> NetBSD
1995-05-08 23:55:16 +00:00
0898887210
Id -> NetBSD
1995-05-08 23:44:37 +00:00
750e07c91c
i387 float version of atan2()
1995-05-08 23:35:10 +00:00
5c75c8b7ad
Use global definitions of i386_[gs]et_ldt_args.
1995-05-06 19:21:37 +00:00
139d140728
Ensure that __progname is in .data, not in .sdata
1995-05-03 22:13:15 +00:00
11fa45b258
Add i387 "float" functions to the makefile
1995-05-03 20:42:23 +00:00
684161edae
Added i387 remainderf and sqrtf
1995-05-03 14:47:35 +00:00
aff3578b36
Explicitly unblock SIGALRM while waiting.
1995-05-03 12:52:43 +00:00
b1f67e2969
m68k sig{set,long}jmp from Henric Jungheim (uhenric@mcl.ucsb.edu) as
...
followup to GNATS report port-amiga/1009.
Passes regression tests.
I added a NetBSD string and changed jbra to jra.
1995-05-03 03:43:05 +00:00
e4748bf0ca
typo: fld_... -> flt_...
1995-05-03 03:25:11 +00:00
437b1a3f15
Enable C and Pig Latin message catalogs.
1995-05-02 19:57:15 +00:00
0e315a5455
C and Pig Latin message catalogs for libc
1995-05-02 19:56:27 +00:00
615fb07b15
The C Standard says that printf's format string is a multi-byte
...
character string. NA1 says that the 99 characters required by the
Standard have representations in the initial state which are one byte
long and do not alter the state.
Thus we can safely break apart the format string with mbtowc() until
we reach a '%' character, and the process format directive characters
one by one.
We really shouldn't be using mbtowc(), rather mbrtowc() (which takes a
mbstate-t argument) but we don't have the NA1 functions implemented
yet. This is safe, because even when we do we're not likely to
support multi-byte character encodings that use shift states.
1995-05-02 19:52:41 +00:00
66f0c16f14
Use POSIX tty semantics.
1995-05-02 01:40:14 +00:00
42c2892cc9
Fixed the key mapping code and reverted Charles' changes.
1995-04-29 20:44:00 +00:00
64fe160dd5
include string.h and/or stdlib.h as appropriate, if NetBSD.
1995-04-29 05:42:23 +00:00
2583d406f9
change some of the rpc "on-the-wire" structures' fields to be explicitly-sized
...
types. add xdr_{,u_}int{16,32}_t() functions to convert them.
This is necessary, because things like BPF use the RPC headers to look
at the on-the-wire data, so the headers must accurately represent
what's on the wire, too.
1995-04-29 05:26:31 +00:00
d2e405e546
functions to set FP exception masks & sticky exceptions. they abort, for now.
1995-04-29 05:10:55 +00:00
3e14f3894b
get & set FP rounding direction. these actually seem to work.
1995-04-29 05:09:53 +00:00
234eecadfb
add entries for the float rounding and exception functions
1995-04-29 05:09:14 +00:00
528957a005
Winning Strategies has placed this code into the Public Domain
1995-04-28 23:19:22 +00:00
7b4ed4f858
Winning Strategies has placed this code into the Public Domain
1995-04-28 22:59:46 +00:00
390695fb9c
$Id: $ -> $NetBSD: $
1995-04-28 22:57:54 +00:00
954b796156
Winning Strategies has placed this code into the Public Domain
1995-04-28 22:53:59 +00:00
5c7208348c
Winning Strategies has placed this code into the Public Domain
1995-04-28 22:43:31 +00:00
a6fa20ea30
Added __flt_rounds, fp{get,set}round.
1995-04-28 21:57:00 +00:00
5e5fe216ab
removed log2 from manpage, libm doesn't provide that function.
1995-04-27 18:21:43 +00:00
c1a3077d03
Remove dead code that can't possibly work.
1995-04-27 04:49:26 +00:00
4d13217262
Trivial code ordering change.
1995-04-27 03:59:38 +00:00
c6284ba067
The typo police "dase" != "case"
1995-04-25 21:41:48 +00:00
348d202923
Fix typo...
1995-04-25 21:22:17 +00:00
5993e44288
kvm_vax.c added.
1995-04-25 15:41:11 +00:00
ae8e3c9f1a
Changed abs.S to abs.c for vax.
1995-04-25 15:36:39 +00:00
02788519a9
termios code has been moved to new libc/termios directory.
1995-04-25 00:06:17 +00:00
5f11a56ca9
Initial checkin of termios directory. The code used to be in
...
gen/termios.c, but has been split out so that NetBSD users don't trip
over the extensions that intrude into the POSIX namespace.
1995-04-25 00:04:21 +00:00
798d2ef128
Handle new termios subdirectory.
1995-04-25 00:00:58 +00:00
6d97ed4663
Use a switch instead of three if statements in xdr_long() and xdr_u_long(),
...
gcc generates slightly better code on all of the architectures I checked.
Also changed xdr_wrapstring to return the return value of xdr_string
directly.
1995-04-24 23:33:39 +00:00
b523e3778b
cast last argument of catgets() to (char *) to quiet compiler's complaints
...
about loss of 'const'-ness.
1995-04-24 16:37:31 +00:00
99a919e044
fix typo(?): rpc__errlist usage shouldn't have had two underscores.
...
Also, cast return types to (char *) to quiet compiler's complaints about
loss of 'const'-ness.
1995-04-24 16:34:39 +00:00
a3fa60161e
Preserve the equality "x == y*(x/y)+(x%y)" for negative y; from Lon Willett.
1995-04-22 09:33:49 +00:00
61207f1472
Changed auth_errmsg() and clnt_sperrno() to access error messages
...
directly instead of by linear search.
1995-04-21 21:59:52 +00:00
9f3b5edc71
Don't pass a third argument (LASTUNSIGNED) to xdrproc_t functions ---
...
they only take two arguments. Presumably this was done to prevent
problems when users passed xdr_string instead of xdr_wrapstring.
Function prototypes are a better way to fix this "problem".
1995-04-21 21:49:29 +00:00
5c433aa57e
char * -> const char *
1995-04-19 23:31:15 +00:00
460abf6176
kvm machine specific code for VAX.
1995-04-17 12:44:34 +00:00
db0c9cd300
Removed VAX specific definitions.
1995-04-17 12:28:29 +00:00
ce0bb6e8d2
Added libc VAX specific files.
1995-04-17 12:23:33 +00:00
29f53fb76f
Removed comment that explained that this code is not portable. A better
...
comment is already present near the top of the file.
1995-04-14 20:34:41 +00:00
adc4ab0186
Don't pass a third argument (LASTUNSIGNED) to xdrproc_t functions ---
...
they only take two arguments. Presumably this was done to prevent
problems when users passed xdr_string instead of xdr_wrapstring.
Function prototypes are a better way to fix this "problem".
1995-04-14 20:30:16 +00:00
3c565bbea8
Changed bzero to memset.
...
Changed bcmp to memcmp.
Added #include <string.h> to bring prototypes into scope.
1995-04-14 19:48:20 +00:00
4af41fe4b3
bcopy -> memcpy
1995-04-14 19:25:13 +00:00
df8b005f6e
First cut at adding float versions of math functions to the manpages.
1995-04-14 18:39:53 +00:00
3c8e6db690
Disable "dead kernel" stuff until we have something new.
1995-04-13 19:32:40 +00:00
d4afa3b7f5
Use ${DESTDIR} when installing libc.tags
1995-04-12 00:56:12 +00:00
53bd3d0603
Added __flt_rounds, fp{get,set}{mask,round,sticky}.
1995-04-11 18:13:49 +00:00
01194e13e9
Bump minor version for __flt_rounds() and fp{get,set}{round,mask,sticky}.
...
These functions are only available for the i386, m68k, and the sparc but
we can't wait for the other architectures (because FLT_ROUNDS, which
expands to __flt_rounds(), is likely being used in someones code).
1995-04-11 14:28:16 +00:00
76a6b7c3b3
fix operator precedence error (pr 951 from Ted Lemon)
1995-04-11 02:57:52 +00:00
a0c1305064
Added __flt_rounds, fp{get,set}{mask,round,sticky}.
1995-04-10 21:09:06 +00:00
ae34e2ea6e
Put jtc's notice back, since these are now roughly identical.
1995-04-09 23:32:53 +00:00
ac11de32c1
Actually, bitfields are faster on the '040; optimize for it, but adjust the
...
fields so that the mask and sticky bits are the same.
1995-04-09 23:28:38 +00:00
99a6cfe734
Rewrite these to use the accrued exception byte for sticky flags, and to
...
avoid expensive bitfield instructions.
1995-04-09 22:49:26 +00:00
10cfe03e6d
Stylistic change to match fpsetsticky().
1995-04-09 21:55:50 +00:00
65a1322cd9
Reverse sense of exception bits.
1995-04-09 21:55:20 +00:00
42d9c8af6c
Oops; need to use fnstenv/fldenv for this.
1995-04-09 21:00:57 +00:00
a94ab51d20
Fix typo.
1995-04-09 20:44:02 +00:00
10b402aa60
Add fpset{mask,round,sticky}().
1995-04-09 20:33:13 +00:00
ddbc579aa7
Another optimization.
1995-04-09 19:31:33 +00:00
14e246dc4a
Optimize.
1995-04-09 19:18:49 +00:00
907e54c9e9
ENTRY(fpgetmask) -> ENTRY(fpgetsticky)
1995-04-09 19:14:28 +00:00
1b41528de0
removed commented-out #include <machine/asm.h>
1995-04-09 19:13:26 +00:00
80bba6a1e1
Added flt_rounds, fpget{round,mask,sticky}.
1995-04-07 14:57:16 +00:00
30c05ea2b8
Added __flt_rounds(), fp{get,set}{round,mask,sticky}().
1995-04-07 00:41:43 +00:00
b331e63615
should work without specialization now.
1995-04-02 20:45:26 +00:00
a5c856b8c8
KERNEL -> _KERNEL
1995-03-28 17:29:16 +00:00
ae0b9c2010
KERNEL -> _KERNEL
1995-03-28 17:18:59 +00:00
2ef4abe78f
change second arg of fgets() from size_t to int
1995-03-25 02:50:04 +00:00
d6c3ebedb4
Fix overlooked FIXME: unsigned int -> u_int32_t.
1995-03-25 01:48:53 +00:00
f86410093b
Changed name of __weak_reference() to __indr_reference(). They really
...
are indirect references, and I want to add a real __weak_reference()
macro to <machine/cdefs.h> soon.
1995-03-23 19:58:48 +00:00
7870f9f542
removed unnecessary #include <stddef.h>
1995-03-23 19:51:13 +00:00
92702b3bed
removed unnecessary #include <stddef.h>
1995-03-23 19:42:42 +00:00
4255068068
Removed const qualifier from ftell's FILE * argument. It's not ANSI,
...
and the recent change to flush output causes it to be changed.
1995-03-22 18:17:24 +00:00
39469721f8
update minor number for new quad_t versions of abs and div
1995-03-22 00:58:07 +00:00
3b29974599
Added "long long" support %ll{d,x,o,i}.
1995-03-22 00:56:55 +00:00
7681b92c66
Enable qabs(), a quad_t version of abs() and labs().
1995-03-22 00:36:52 +00:00
918d73c578
LDIV -> QDIV
1995-03-21 23:46:00 +00:00
bec46bcced
add cross references to qdiv(3)
1995-03-21 23:22:17 +00:00
bfd7fc20d9
New function qdiv. Like div and ldiv, but works with quad_t's.
1995-03-21 23:12:35 +00:00
5091f60d44
ldiv takes long arguments
1995-03-21 22:54:50 +00:00
d1a49b5d27
#include <machine/endian.h>.
1995-03-21 20:54:05 +00:00
62648a14f0
Clone from sleep(), with the logic for returning a value removed.
1995-03-21 13:50:32 +00:00
d53dfd3d3c
Minor changes.
1995-03-21 13:44:40 +00:00
f75ba16b09
Update to use timer{add,sub}().
1995-03-21 13:33:34 +00:00
79b7b78087
Clarify a comment slightly.
1995-03-20 14:47:39 +00:00
ce36f636ab
Separate machine dependencies.
1995-03-20 14:45:27 +00:00
3b5d18b58e
SYS_brk -> SYS_break, and other (minor) changes.
1995-03-20 14:02:03 +00:00
3924aee202
Added comment explaining why we are using a different algorithm than
...
what was adopted in tzcode95c to solve the problem of the first char
detzcode() extracts requiring sign extention (this is needed for
machines with 64 bit longs).
Our implementation is a bit more efficent, but requires a new macro,
SIGN_EXTEND_CHAR(), and a conditional to set it appropriately).
One minor enhancement for machines without ANSI compilers that have 32
bit longs would be to define SIGN_EXTEND_CHAR() to be the identity
macro.
1995-03-16 19:14:16 +00:00
a63744d63c
Speed up getgrnam() and getgrpid() by using yp_match().
1995-03-16 11:48:01 +00:00
990d7c70e0
Added some #defines for NetBSD's defaults.
1995-03-14 18:49:49 +00:00
13a588d992
Bump minor number. The new time code has added a few more functions to
...
its API.
1995-03-13 05:27:51 +00:00
37c28a9b5b
.include ${.CURDIR}/time/Makefile.inc
1995-03-13 05:26:07 +00:00
1eece09a70
Make libpcap.
1995-03-12 20:49:52 +00:00
7aa7897748
Simplify.
1995-03-11 20:28:59 +00:00
be80b6891a
Removed "new" from references to newctime(3).
...
Removed -lz from SYNOPSIS.
1995-03-10 18:21:24 +00:00
c12abbe244
Added NetBSD Id.
1995-03-10 18:12:38 +00:00
0cd8c3623b
Added NetBSD Id.
...
Removed "new" from newctime(3) references.
1995-03-10 18:09:54 +00:00
3a34b570e9
Strictly speaking, these files probably don't belong in the libc sources.
...
On the other hand, it makes it easier to track the master tzcode sources
if we try to keep the distribution together as much as possible.
The zic and zdump commands will access the files the need with make's
.PATH facility.
1995-03-10 07:08:14 +00:00
016bb710d9
ctime.3 and tzset.3 manpages have been moved to libc/time.
1995-03-10 06:29:15 +00:00
20d50456cc
Removed references to ctime.3 and tzset.3 manpages and associated manpage
...
links (they have been moved to libc/time).
1995-03-10 06:15:10 +00:00
27c1463773
Added some manpages and manpage links (moved from libc/gen).
1995-03-10 06:05:38 +00:00
09bcdc8226
A slightly modified version of Chris' patch so that detzcode will sign
...
extend properly on machines with 64 bit longs.
This patch has been submitted to the tz mailing list.
1995-03-10 05:57:35 +00:00
3d319539ac
Change long to time_t as appropriate.
...
Add const qualifier to function argument descriptions as appropriate.
1995-03-10 00:09:36 +00:00
633548e60b
Get rid of NEW (as in NEWCTIME and NEWTZSET).
1995-03-10 00:05:54 +00:00
981bebbf27
Add NetBSD ID's
1995-03-09 23:50:15 +00:00
93ae1c3e13
tzset.3, renamed from newtzset.3, from TZCODE95B.
1995-03-09 23:48:00 +00:00
214492959c
ctime.3 from TZCODE95B, renamed from newctime.3.
1995-03-09 23:46:58 +00:00
ac90835477
Add NetBSD Id's.
1995-03-09 23:41:11 +00:00
65c381f59e
Fix typo.
1995-03-09 23:35:13 +00:00
57274dc48e
date and time functions have been moved
1995-03-09 23:31:07 +00:00
ea8e219f0c
Makefile for new time stuff
1995-03-09 23:26:43 +00:00
347a7d733b
Changed to use NetBSD's defaults
1995-03-09 23:25:36 +00:00
1fac1c1776
New time and date code from ADO
1995-03-09 23:21:48 +00:00
b0446b3200
Port to NetBSD, and add NetBSD RCS tags.
1995-03-06 11:37:58 +00:00
84c86af405
Import LBL libpcap, version 0.0 patch level 3.
1995-03-06 11:32:59 +00:00
3baa1f1967
Changed the multibyte character functions so they work with the native
...
single byte character set.
1995-03-05 07:41:15 +00:00
ae6284d5ba
Removed -o from and added /dev/null to egrep command line. It does the
...
exactly the same thing, but doesn't need 4.4's or our hacked version of
GNU grep.
1995-03-05 07:12:54 +00:00
38937f73d0
flush so that the offset will be correct on streams opened in
...
append mode (from chris torek).
1995-03-05 06:56:09 +00:00
ee38224d2e
fix up some RCS Id's i botched.
1995-03-04 01:55:49 +00:00
fd8d17a56d
First pass at documenting "float" versions of these functions.
1995-03-04 01:36:29 +00:00
09072f5bd9
include proper links to ethers.3
1995-03-02 09:09:07 +00:00
3f10e2da9c
catclose returns int
1995-03-01 08:00:12 +00:00
4c34be6b52
Clean up deleted files.
1995-03-01 00:00:00 +00:00
7cd5ae5858
remove unneeded "#include <stddef.h>"
1995-02-28 01:46:24 +00:00
88ba3f858c
Changed <sys/signal.h> to <signal.h>
1995-02-28 01:13:50 +00:00
d48964d413
clean up Ids; no substantive changes.
1995-02-27 17:29:31 +00:00
edfa833652
from Lite
1995-02-27 17:00:21 +00:00
1e1bba23c7
make lint/SCCS Id if more standard.
1995-02-27 15:47:03 +00:00
2c84ad3a41
add unintrusive Ids
1995-02-27 13:22:58 +00:00
2493ac526d
fix typo, and the fact that i was using a large xterm
1995-02-27 13:22:55 +00:00
402f19d1dd
add unintrusive Ids
1995-02-27 13:21:44 +00:00
110ae2f203
resurrect man page, only to note deprecation; belongs elsewhere (where?)
1995-02-27 13:21:35 +00:00
a954b0787c
add unintrusive Ids
1995-02-27 13:19:23 +00:00
7ce7ea9415
fix Ids
1995-02-27 13:06:20 +00:00
1c44409a29
clean up Id
1995-02-27 13:02:12 +00:00
693e99f736
clean up Ids
1995-02-27 12:54:33 +00:00
4eab61bd40
merge with lite, keeping most local changes. clean up Ids
1995-02-27 12:31:34 +00:00
c67e54a2e2
clean up merge, fix Id's
1995-02-27 11:22:54 +00:00
aeb457b1a7
from Lite
1995-02-27 10:49:50 +00:00
5b9633ddd7
fix RCS Id. fix definition of fsid_t.
1995-02-27 10:43:23 +00:00
be21d1de72
clean up RCS Id's
1995-02-27 10:41:36 +00:00
41f1c39f00
clean up import, roll forward local fixes, clean up Ids
1995-02-27 10:18:34 +00:00
1d23521104
from 4.4-Lite
1995-02-27 09:50:34 +00:00
204556053e
indicate const'ness of args.
1995-02-27 09:45:26 +00:00
c18290a117
delete wordexp reference
1995-02-27 06:25:38 +00:00
fecf194677
oops; we do need errno.h
1995-02-27 06:21:23 +00:00
9060ff0dc7
merge with 4.4-Lite, keeping local changes. clean up Ids
1995-02-27 05:50:11 +00:00
f9f97c4fab
merge with Lite, keeping local changes. Fix up Id format, etc.
1995-02-27 04:34:47 +00:00
5a21812615
oops; since i kept the writev() trick, still need uio.h
1995-02-27 04:34:44 +00:00
d7ab506f38
merge with Lite, keeping local changes. Fix up Id format, etc.
1995-02-27 04:34:25 +00:00
b585e843ca
update from Lite, with local changes. fix Ids, etc.
1995-02-27 04:12:15 +00:00
72c46b1cdc
merge with Lite, keeping local changes. Also use new Id format.
1995-02-27 03:42:42 +00:00
4879d5dc50
don't forget to take address before deref'ing thru. from fvdl.
1995-02-27 01:03:47 +00:00
516f67f7c9
re-order things the way they'd like to be ordered
1995-02-25 17:19:26 +00:00
714c54bd02
fix prototype that i botched.
1995-02-25 17:18:31 +00:00
db638fe19d
typo
1995-02-25 17:17:33 +00:00
c2ee3d850f
mention the functions that need to be provided, instead of providing dflts.
1995-02-25 17:10:57 +00:00
4145a97c7f
oops; biffed path
1995-02-25 17:08:29 +00:00
3d5508dc07
mktemp.c belongs here, not gen/Makefile.inc
1995-02-25 17:06:28 +00:00
a87693f257
update from Lite, clean up a bit, seperate arch-specific file list.
1995-02-25 17:05:19 +00:00
572e3f3188
don't forget inifinity.c
1995-02-25 16:24:22 +00:00
ea1ca14ecb
need these for new gen/Makefile
1995-02-25 16:20:12 +00:00
63de9506bf
merge with Lite, keep local changes. clean up id usage
1995-02-25 15:39:01 +00:00
6929ad87a5
need these now, with new net Makefile.inc
1995-02-25 14:58:43 +00:00
5d6d569765
update to 4.4-Lite and/or clean up Id
1995-02-25 14:09:35 +00:00
6e6a4e85b0
update to 4.4-Lite where appropriate, clean up Id format, etc.
1995-02-25 13:40:51 +00:00
97d9d67a27
from lite, with minor name rearrangement to fit.
1995-02-25 09:11:37 +00:00
6534b326c3
use new id style.
1995-02-25 09:02:37 +00:00
2c4d3c4c4a
clean up Id's on files previously imported...
1995-02-25 08:50:56 +00:00
708504beb1
when you have a pointer and want to assign to a quad, you must cast it
...
to long to quiet the compiler.
1995-02-25 07:06:38 +00:00
9386b82936
when you have a quad and want to assign to a pointer, you must say:
...
ptr = (ptr_type)(long)quad;
to quiet the compiler.
1995-02-25 07:02:16 +00:00
83b55061cc
oops; fix the cleanup.
1995-02-25 06:58:58 +00:00
ef0582f1e7
clean up import. also convert everything to new Id format.
1995-02-25 06:20:26 +00:00
547fd46929
4.4-Lite lib/libc/net
1995-02-25 03:54:36 +00:00
32b5bdd221
use NetBSD rather than ID
1995-02-25 03:34:50 +00:00
76e7b276d3
upgrade to 4.4-Lite Makefile, keeping local changes. NOW BUILDS TAGS ON INST
1995-02-25 03:31:42 +00:00
3f45f31f15
strange corner cases:
...
(1) zero top 32 bits for 32-bit unsigned ops; 32-bit value can
be accidentally(?) sign-extended by the compiler/assembler.
(2) fix return value for mod's that cause traps
1995-02-25 03:09:32 +00:00
9e15c98955
save my sanity; stop using Id.
1995-02-25 03:01:33 +00:00
8453143f6d
Added \n to end of format strings used by all the perror-like functions.
...
Added const qualifier to array of error strings.
1995-02-20 21:20:22 +00:00
aef3817e0d
Clean up deleted files.
1995-02-19 12:19:09 +00:00
4902ac3dcf
use the (broken) crypt.c from the 4.4BSD-Lite Foreign distribution, that
...
can encrypt passwords but _cannot_ decrypt anything. "real" (i.e. two-way,
unbroken) crypt() now lives in /usr/src/domestic.
1995-02-19 12:18:56 +00:00
ea66efc784
Enable mc68881 versions of remainder() and scalb().
1995-02-18 01:46:41 +00:00
8961dd234b
Special case 0, as was done in s_scalbn.S.
...
I'm only doing this for consistancy --- someone really needs to measure
whether this optimization is justified.
1995-02-18 01:39:51 +00:00
324e516335
68881-assisted versions of these functions.
1995-02-18 01:24:42 +00:00
e7d917e6eb
Remove extra "u" constraint that caused gcc 2.6.3 not to compile this file.
...
Note that gcc 2.4.5, the compiler we are currently using, still compiles it
correctly after this change.
1995-02-17 06:01:47 +00:00
ac66c90d8d
make copy-to-libkern work properly on the alpha. (deal with no quad support.)
1995-02-13 21:57:24 +00:00
b380b015d1
make this 64-bit-safe.
1995-02-10 18:15:05 +00:00
9fac9bc0af
initial alpha support. no profiling support.
1995-02-10 17:53:00 +00:00
5eecfd8983
stubs.
1995-02-10 17:51:56 +00:00
e4f5181d15
libc support for the alpha. more functions should be written in assembler,
...
but that's optimization. 8-)
1995-02-10 17:49:48 +00:00
da1fb002e9
make these safe for a 64-bit world.
1995-02-10 17:47:26 +00:00
b42e80ba75
list the files needed on the alpha.
1995-02-10 17:46:48 +00:00
819bb2cd8c
alphas don't need libc quad support.
1995-02-10 17:45:39 +00:00
jtc