diff options
author | Ulrich Drepper <drepper@redhat.com> | 1997-02-25 05:18:05 +0000 |
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committer | Ulrich Drepper <drepper@redhat.com> | 1997-02-25 05:18:05 +0000 |
commit | 2f6d1f1be920d156768f7fa17957c782c770ed36 (patch) | |
tree | fee2ef40d1d316cb4bf63f07788b26d47009c646 /manual | |
parent | 6bac11d99322f3cdf751b43dc3b3456039fab26c (diff) | |
download | glibc-2f6d1f1be920d156768f7fa17957c782c770ed36.zip glibc-2f6d1f1be920d156768f7fa17957c782c770ed36.tar.gz glibc-2f6d1f1be920d156768f7fa17957c782c770ed36.tar.bz2 |
update from main archive 970225cvs/libc-970225
1997-02-24 23:05 Wolfram Gloger <wmglo@dent.med.uni-muenchen.de>
* malloc/malloc.c (malloc_get_state): New function.
Saves global malloc state to an opaque data structure which
is dynamically allocated in the heap.
* malloc/malloc.c (malloc_set_state): New function.
Restore previously obtained state.
* malloc/malloc.h: Add declaration of malloc_get_state()
and malloc_set_state().
1997-02-24 23:27 Ulrich Drepper <drepper@cygnus.com>
* sysdeps/libm-ieee754/s_cbrtl.c: Shift B1_EXP value to right
position.
1997-02-24 17:38 Ulrich Drepper <drepper@cygnus.com>
* misc/error.c: Make error and error_at_line weak aliases of
__error and __error_at_line respectively.
Suggested by David Mosberger-Tang <davidm@AZStarNet.COM>.
* sysdeps/unix/sysv/linux/i386/socket.S: Update copyright.
1997-02-22 11:30 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de>
* elf/ldd.bash.in: Run the program directly, not as argument
to the dynamic linker, if it contains an interpreter segment.
* elf/ldd.sh.in: Likewise.
* elf/rtld.c (dl_main): In verify mode check whether the dynamic
object contains an interpreter segment and exit with 2 if not.
1997-02-23 01:23 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de>
* Makefile (distribute): Remove nsswitch.h, netgroup.h, mcheck.h
and xlocale.h. Make-dist adds them automagically.
1997-02-22 12:25 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de>
* locale/C-time.c (_nl_C_LC_TIME): Add missing entry for
time-era-num-entries.
1997-02-06 13:49 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de>
* rellns-sh: No need to check for existance of first parameter.
1997-02-24 15:20 Jonathan T. Agnew <jtagnew@amherst.edu>
* glibcbug.in: Don't mention destination on MAIL_AGENT command line
to avoid duplicate mail.
1997-02-24 03:51 Ulrich Drepper <drepper@cygnus.com>
* Makefile (distribute): Add isomac.c.
(tests): Run isomac test.
* features.h (__USE_ISOC9X): New macro.
* catgets/catgets.c: Don't use global variable `optind'. Instead
use result computed by argp_parse.
* db/makedb: Likewise.
* locale/programs/locale.c: Likewise.
* locale/programs/localedef.c: Likewise.
* libio/stdio.h: Rewrite. Make it more readable and add comments.
* libio/clearerr.c: Remove clearerr_locked alias.
* libio/feof.c: Remove feof_locked alias.
* libio/ferror.c: Remove feof_locked alias.
* libio/fileno.c: Remove fileno_locked alias.
* libio/fputc.c: Remove fputc_locked alias.
* libio/getc.c: Remove getc_locked alias.
* libio/getchar.c: Remove getchar_locked alias.
* libio/iofflush.c: Remove fflush_locked alias.
* libio/putc.c: Remove putc_locked alias.
* libio/putc.c: Remove putchar_locked alias.
* stdio-common/printf_fp.c: When number is inifinity print INF
or inf depending on case of specifier. Same for NaN where NAN
or nan is printed. Specified in ISO C 9X.
* misc/sys/cdefs.h (__restrict): Define to empty string for now.
* stdio/stdio.h: Add __restrict to prototypes where necessary.
* libio/stdio.h: Likewise.
* stdlib/stdlib.h: Likewise.
* string/string.h: Likewise.
* time/time.h: Likewise.
* wcsmbs/wchar.h: Likewise.
* stdlib/strtod.c: Change to recognize INF, INFINITY, NAN, and
NAN(...).
* sysdeps/ieee754/huge_val.h: Define HUGE_VALF and HUGE_VALL instead
of HUGE_VALf and HUGE_VALL.
* stdlib/strtof.c (FLOAT_HUGE_VAL): Use standard name HUGE_VALF
instead of HUGE_VALf.
* wcsmbs/wcstof.c: Likewise.
* stdlib/strtold.c (FLOAT_HUGE_VAL): Use standard name HUGE_VALL
instead of HUGE_VALl.
* wcsmbs/wcstold.c: Likewise.
* sysdeps/posix/gai_strerror.c: Use size_t for counter variable to
avoid warning.
* wcsmbs/Makefile (routines): Add wcscasecmp and wcsncase.
* wcsmbs/wchar.h: Add prototypes for wcscasecmp and wcsncase.
* wcsmbs/wcscasecmp.c: New file.
* wcsmbs/wcsncase.c: New file.
* stdlib/strtol.c: Define wide character quad word functions as
wcstoll and wcstoull and normal versions as strtoll and strtoull.
* wcsmbs/wchar.h: Add prototypes for wcstoll and wcstoull.
* wcsmbs/wcstoq: Renamed to wcstoll.c.
* wcsmbs/wcstouq: Renamed to wcstoull.c.
* wcsmbs/wcstoll.c: Renamed from wcstoq.c. Make wcstoq a weak
alias of wcstoll.
* wcsmbs/wcstoull.c: Renamed from wcstouq.c. Make wcstouq a weak
alias of wcstoull.
* wcsmbs/Makefile (routines): Replace wcstoq and wcstouq by
wcstoll and wcstoull respectively.
* stdlib/strtoq.c: Rename to strtoll.c.
* stdlib/strtouq.c: Rename to strtoull.c.
* stdlib/strtoll.c: Renamed from strtoq.c. Make strtoq a weak
alias of strtoll.
* stdlib/strtoll.c: Renamed from strtouq.c. Make strtouq a weak
alias of strtoull.
* stdlib/Makefile (routines): Replace strtoq and strtouq by
strtoll and strtoull respectively.
* stdio-common/vfscanf.c: Don't use __strtoq_internal and
__strtouq_internal but instead __strtoll_internal and
__strtoull_internal respectively.
* stdlib/stdlib.h (strtoq): Use __internal_strtoll in inline version.
(strtouq): Similar with __internal_strtoull.
* wcsmbs/wchar.h (wcstoq): Use __internal_wcstoll in inline version.
(wcstouq): Similar with __internal_wcstoull.
1997-02-23 04:38 Ulrich Drepper <drepper@cygnus.com>
* stdlib/strtol.c (STRTOL): It is not illegal to parse a minus
sign in the strtouXX functions. The results gets simply negated.
* stdio-common/tstscanf.c: Add testcase for above case.
* stdlib/tst-strtol.c: Correct tests.
* manual/stdio-fp.c: New file. Generate output for example program
in stdio.texi.
* stdio-common/Makefile (routines): Add printf_fphex.
* stdio-common/vfprintf.c: Add handling of %a and %A specifier.
* stdio-common/printf_fphex.c: New file. Implement %a and %A
specifier.
1997-02-22 03:01 Ulrich Drepper <drepper@cygnus.com>
* sysdeps/unix/sysv/linux/timebits.h (CLK_TCK): Don't defined if
__STRICT_ANSI__.
* math/math.h: Prevent definition of struct exception when using
C++.
1997-02-22 01:45 Ulrich Drepper <drepper@cygnus.com>
* sysdeps/unix/syscalls.list: Dup takes only one argument.
Reported by Greg McGary.
1997-02-21 00:22 Miles Bader <miles@gnu.ai.mit.edu>
1997-02-20 01:28 Miles Bader <miles@gnu.ai.mit.edu>
1997-02-19 13:56 Miles Bader <miles@gnu.ai.mit.edu>
1997-02-18 15:39 Miles Bader <miles@gnu.ai.mit.edu>
1997-02-17 10:58 Miles Bader <miles@gnu.ai.mit.edu>
1997-02-15 10:23 Miles Bader <miles@gnu.ai.mit.edu>
(mutex_lock, mutex_unlock, mutex_trylock): Defined in terms of
__mutex_*.
(mutex_t): Type removed & replaced by new macro.
(tsd_key_t): Typedef to int instead of pthread_key_t.
(tsd_key_create, tsd_setspecific, tsd_getspecific): New macros.
(__pthread_initialize): New macro, work around assumption of pthreads.
* sysdeps/mach/hurd/i386/init-first.c (__libc_argv, __libc_argc):
__hurd_sigthread_stack_end, __hurd_sigthread_stack_variables,
__hurd_threadvar_max, __hurd_threadvar_stack_offset,
__hurd_threadvar_stack_mask): Variables removed.
1997-02-14 14:07 Miles Bader <miles@gnu.ai.mit.edu>
* hurd/hurd.h (_hurd_pids_changed_stamp, _hurd_pids_changed_sync):
1997-02-24 17:06 Geoffrey Keating <geoffk@discus.anu.edu.au>
* sysdeps/unix/sysv/linux/accept.S (NARGS): Describe number of
arguments taken, for sysdeps/unix/sysv/linux/powerpc/socket.S.
* sysdeps/unix/sysv/linux/bind.S: Likewise.
* sysdeps/unix/sysv/linux/connect.S: Likewise.
* sysdeps/unix/sysv/linux/getpeername.S: Likewise.
* sysdeps/unix/sysv/linux/getsockname.S: Likewise.
* sysdeps/unix/sysv/linux/getsockopt.S: Likewise.
* sysdeps/unix/sysv/linux/listen.S: Likewise.
* sysdeps/unix/sysv/linux/recv.S: Likewise.
* sysdeps/unix/sysv/linux/recvfrom.S: Likewise.
* sysdeps/unix/sysv/linux/recvmsg.S: Likewise.
* sysdeps/unix/sysv/linux/send.S: Likewise.
* sysdeps/unix/sysv/linux/sendmsg.S: Likewise.
* sysdeps/unix/sysv/linux/sendto.S: Likewise.
* sysdeps/unix/sysv/linux/setsockopt.S: Likewise.
* sysdeps/unix/sysv/linux/shutdown.S: Likewise.
* sysdeps/unix/sysv/linux/socketpair.S: Likewise.
1997-02-15 04:51 Ulrich Drepper <drepper@cygnus.com>
Diffstat (limited to 'manual')
-rw-r--r-- | manual/stdio-fp.c | 28 | ||||
-rw-r--r-- | manual/stdio.texi | 55 |
2 files changed, 73 insertions, 10 deletions
diff --git a/manual/stdio-fp.c b/manual/stdio-fp.c new file mode 100644 index 0000000..db94807 --- /dev/null +++ b/manual/stdio-fp.c @@ -0,0 +1,28 @@ +/* This program is to generate one of the examples in stdio.texi. */ + +#include <stdio.h> + + +static void +print (double v) +{ + printf ("|%13.4a|%13.4f|%13.4e|%13.4g|\n", v, v, v, v); +} + + +int +main (void) +{ + print (0.0); + print (0.5); + print (1.0); + print (-1.0); + print (100.0); + print (1000.0); + print (10000.0); + print (12345.0); + print (100000.0); + print (123456.0); + + return 0; +} diff --git a/manual/stdio.texi b/manual/stdio.texi index e922fd1..04c635b 100644 --- a/manual/stdio.texi +++ b/manual/stdio.texi @@ -1007,6 +1007,12 @@ whichever is more appropriate for its magnitude. @samp{%g} uses lower-case letters and @samp{%G} uses upper-case. @xref{Floating-Point Conversions}, for details. +@item @samp{%a}, @samp{%A} +Print a floating-point number in a hexadecimal fractional notation which +the exponent to base 2 represented in decimal digits. @samp{%a} uses +lower-case letters and @samp{%A} uses upper-case. @xref{Floating-Point +Conversions}, for details. + @item @samp{%c} Print a single character. @xref{Other Output Conversions}. @@ -1194,6 +1200,34 @@ than -4 or greater than or equal to the precision; otherwise they use the of the result and a decimal-point character appears only if it is followed by a digit. +The @samp{%a} and @samp{%A} conversions are meant for representing +floating-point number exactly in textual form so that they can be +exchanged as texts between different programs and/or machines. The +numbers are represented is the form +@w{[@code{-}]@code{0x}@var{h}@code{.}@var{hhh}@code{p}[@code{+}|@code{-}]@var{dd}}. +At the left of the decimal-point character exactly one digit is print. +This character is only @code{0} is the number is denormalized. +Otherwise the value is unspecifed; it is implemention dependent how many +bits are used. The number of hexadecimal digits on the right side of +the decimal-point character is equal to the precision. If the precision +is zero it is determined to be large enough to provide an exact +representation of the number (or it is large enough to distinguish two +adjacent values if the @code{FLT_RADIX} is not a power of 2, +@pxref{Floating Point Parameters}) For the @samp{%a} conversion +lower-case characters are used to represent the hexadecimal number and +the prefix and exponent sign are printed as @code{0x} and @code{p} +respectively. Otherwise upper-case characters are used and @code{0X} +and @code{P} are used for the representation of prefix and exponent +string. The exponent to the base of two is printed as a decimal number +using at least one digit but at most as many digits as necessary to +represent the value exactly. + +If the value to be printed represents infinity or a NaN, the output is +@w{[@code{-}]@code{inf}} or @code{nan} respectively if the conversion +specifier is @samp{%a}, @samp{%e}, @samp{%f}, or @samp{%g} and it is +@w{[@code{-}]@code{INF}} or @code{NAN} respectively if the conversion is +@samp{%A}, @samp{%E}, or @samp{%G}. + The following flags can be used to modify the behavior: @comment We use @asis instead of @samp so we can have ` ' as an item. @@ -1255,21 +1289,22 @@ floating-point conversions. All of the numbers were printed using this template string: @smallexample -"|%12.4f|%12.4e|%12.4g|\n" +"|%13.4a|%13.4f|%13.4e|%13.4g|\n" @end smallexample Here is the output: @smallexample -| 0.0000| 0.0000e+00| 0| -| 1.0000| 1.0000e+00| 1| -| -1.0000| -1.0000e+00| -1| -| 100.0000| 1.0000e+02| 100| -| 1000.0000| 1.0000e+03| 1000| -| 10000.0000| 1.0000e+04| 1e+04| -| 12345.0000| 1.2345e+04| 1.234e+04| -| 100000.0000| 1.0000e+05| 1e+05| -| 123456.0000| 1.2346e+05| 1.234e+05| +| 0x0.0000p+0| 0.0000| 0.0000e+00| 0| +| 0x1.0000p-1| 0.5000| 5.0000e-01| 0.5| +| 0x1.0000p+0| 1.0000| 1.0000e+00| 1| +| -0x1.0000p+0| -1.0000| -1.0000e+00| -1| +| 0x1.9000p+6| 100.0000| 1.0000e+02| 100| +| 0x1.f400p+9| 1000.0000| 1.0000e+03| 1000| +| 0x1.3880p+13| 10000.0000| 1.0000e+04| 1e+04| +| 0x1.81c8p+13| 12345.0000| 1.2345e+04| 1.234e+04| +| 0x1.86a0p+16| 100000.0000| 1.0000e+05| 1e+05| +| 0x1.e240p+16| 123456.0000| 1.2346e+05| 1.235e+05| @end smallexample Notice how the @samp{%g} conversion drops trailing zeros. |