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author | Ulrich Drepper <drepper@redhat.com> | 1998-07-28 16:26:04 +0000 |
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committer | Ulrich Drepper <drepper@redhat.com> | 1998-07-28 16:26:04 +0000 |
commit | e852e889444a8bf27f3e5075d064e9922b38e7e2 (patch) | |
tree | 75d2d4b1010a26d723daefef7909d1a6355929bc /manual/math.texi | |
parent | c9243dacea19b7dcf36bb69ca83877d3ea905831 (diff) | |
download | glibc-e852e889444a8bf27f3e5075d064e9922b38e7e2.tar.gz glibc-e852e889444a8bf27f3e5075d064e9922b38e7e2.tar.xz glibc-e852e889444a8bf27f3e5075d064e9922b38e7e2.zip |
Update.
1998-07-28 Ulrich Drepper <drepper@cygnus.com> * math/libm-test.c (tgamma_test): Remove redundant tests. 1998-07-28 16:20 Ulrich Drepper <drepper@cygnus.com> * sysdeps/generic/glob.c: Correct problems with */foo and GLOB_NOCHECK where foo does not exist in any of the subdirectories. Reported by Paul D. Smith <psmith@BayNetworks.COM>. * posix/globtest.sh: Add test for this bug. 1998-07-28 Mark Kettenis <kettenis@phys.uva.nl> * io/sys/statfs.h: Fix typos. * io/sys/statvfs.h: Fix typos. 1998-07-28 Ulrich Drepper <drepper@cygnus.com> * version.h (VERSION): Bump to 2.0.95. * math/Makefile (libm-calls): Remove w_gamma, add w_tgamma. * math/Versions [GLIBC_2.1]: Add tgamma, tgammaf, and tgammal. * math/libm-test.c: Split old gamma_test and move half of it in new function tgamma_test. * math/bits/mathcalls.h: Add declaration of tgamma. * sysdeps/libm-ieee754/k_standard.c: Change gamma errors into tgamma errors. * sysdeps/libm-ieee754/w_gamma.c: Remove lgamma compatibility code and rename to ... * sysdeps/libm-ieee754/w_tgamma.c: ... this. New file. * sysdeps/libm-ieee754/w_gammaf.c: Remove lgammaf compatibility code and rename to ... * sysdeps/libm-ieee754/w_tgammaf.c: ... this. New file. * sysdeps/libm-ieee754/w_gammal.c: Remove lgammal compatibility code and rename to ... * sysdeps/libm-ieee754/w_tgammal.c: ... this. New file. * sysdeps/libm-ieee754/w_lgamma.c: Add gamma as weak alias. * sysdeps/libm-ieee754/w_lgammaf.c: Likewise. * sysdeps/libm-ieee754/w_lgammal.c: Likewise. * stgdio-common/printf-parse.h: Implement handling of j, t, and z modifiers. * stdio-common/vfprintf.c: Likewise. * stdio-common/vfscanf.c: Likewise. * manual/stdio.texi: Document new printf/scanf modifiers. * sysdeps/unix/sysv/linux/recvmsg.c: Remove alias __recvmsg. * sysdeps/unix/sysv/linux/sendmsg.c: Remove alias __sendmsg. 1998-07-28 Thorsten Kukuk <kukuk@vt.uni-paderborn.de> * sunrpc/Makefile (routines): Add clnt_unix and svc_unix. * sunrpc/Versions: Add new *unix_create functions. * sunrpc/clnt_gen.c: Add support for RPC over AF_UNIX. * sunrpc/clnt_unix.c: New, client side of RPC over AF_UNIX. * sunrpc/key_call.c: Use RPC over AF_UNIX for communication with keyserv daemon. * sunrpc/rpc/clnt.h: Add AF_UNIX based RPC function prototypes. * sunrpc/rpc/svc.h: Likewise. * sunrpc/svc_authux.c: Copy internal auth flavor if none is given. * sunrpc/svc_tcp.c: Fix typos. * sunrpc/svc_unix.c: New, server side of AF_UNIX based RPC. * nis/Makefile: Remove currently not working cache functions. * nis/Versions: Add __nisbind_* functions for rpc.nisd. * nis/nis_call.c: Rewrite binding to a NIS+ server to reuse CLIENT handles. * nis/nis_file.c: Fix memory leaks. * nis/nis_intern.h: Move internal structs from here ... * nis/rpcsvc/nislib.h: ... to here for NIS+ server and tools. * nis/nis_lookup.c: Try at first if last client handle works. * nis/nis_table.c: Likewise. * nis/nis_checkpoint.c: Adjust __do_niscall2 parameters. * nis/nis_mkdir.c: Likewise. * nis/nis_ping.c: Likewise. * nis/nis_rmdir.c: Likewise. * nis/nis_server.c: Likewise. * nis/nis_util.c: Likewise. * nis/nis_findserv.c (__nis_findfastest): Little optimization. 1998-07-28 Andreas Jaeger <aj@arthur.rhein-neckar.de> * stdlib/strtol.c (STRTOL_LONG_MAX): Correct typo in last patch - define as LONG_MAX. 1998-07-28 09:31 Ulrich Drepper <drepper@cygnus.com> * nscd/connections.c (gr_send_answer): Deal with missing UIO_MAXIOV. Correct test whether writev send all data. * nscd/nscd_getgr_r.c (__nscd_getgr_r): Correct test whether readv received all data. 1998-07-28 Mark Kettenis <kettenis@phys.uva.nl> * nscd/nscd_getgr_r.c (__nscd_getgr_r): Deal with missing UIO_MAXIOV. 1998-07-28 Mark Kettenis <kettenis@phys.uva.nl> * sysdeps/mach/hurd/dl-sysdep.c (open_file): Change assert call to allow mode to be 0. (__xstat): New function. (__fxstat): New function. (_dl_sysdep_read_whole_file): Removed. The implementation in `elf/dl-misc.c' now also works for the Hurd.
Diffstat (limited to 'manual/math.texi')
-rw-r--r-- | manual/math.texi | 29 |
1 files changed, 25 insertions, 4 deletions
diff --git a/manual/math.texi b/manual/math.texi index 4386c2fefc..e1d597d06a 100644 --- a/manual/math.texi +++ b/manual/math.texi @@ -857,7 +857,8 @@ The sign of the gamma function is stored in the global variable the intermediate result was positive or zero, and, @code{-1} if it was negative. -You can compute the actual gamma function as follows: +To compute the real gamma function you can use the @code{tgamma} +function or you can compute the values as follows: @smallexample lgam = lgamma(x); gam = signgam*exp(lgam); @@ -878,15 +879,35 @@ the intermediate result in the variable pointed to by @var{signp} instead of in the @var{signgam} global. @end deftypefun -@ignore @comment math.h @comment SVID @deftypefun double gamma (double @var{x}) @deftypefunx float gammaf (float @var{x}) @deftypefunx {long double} gammal (long double @var{x}) -??? _not_ exp(lgamma())*signgam - historical? +These functions exist for compatibility reasons. They are equivalent to +@code{lgamma} etc. It is better to use @code{lgamma} since for one the +name reflect better the actual computation and @code{lgamma} is also +standardized in @w{ISO C 9x} while @code{gamma} is not. +@end deftypefun + +@comment math.h +@comment XPG +@deftypefun double tgamma (double @var{x}) +@deftypefunx float tgammaf (float @var{x}) +@deftypefunx {long double} tgammal (long double @var{x}) +@code{tgamma} applies the gamma function to @var{x}. The gamma +function is defined as +@tex +$$\Gamma(x) = \int_0^\infty t^{x-1} e^{-t} \hbox{d}t$$ +@end tex +@ifnottex +@smallexample +gamma (x) = integral from 0 to @infinity{} of t^(x-1) e^-t dt +@end smallexample +@end ifnottex + +This function was introduced in @w{ISO C 9x}. @end deftypefun -@end ignore @comment math.h @comment SVID |