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author | Roland McGrath <roland@gnu.org> | 1996-05-26 19:19:51 +0000 |
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committer | Roland McGrath <roland@gnu.org> | 1996-05-26 19:19:51 +0000 |
commit | 59dd864187ee61b6f0bfd7abc85e2fea4b479cb7 (patch) | |
tree | e935d6f39bffe914520946c22a89e11180ba4745 /stdlib/lldiv.c | |
parent | 27a110706b570569049e6702f99670e3064e53c1 (diff) | |
download | glibc-59dd864187ee61b6f0bfd7abc85e2fea4b479cb7.tar.gz glibc-59dd864187ee61b6f0bfd7abc85e2fea4b479cb7.tar.xz glibc-59dd864187ee61b6f0bfd7abc85e2fea4b479cb7.zip |
Sun May 26 15:15:08 1996 Roland McGrath <roland@delasyd.gnu.ai.mit.edu>
* stdlib/ldiv.c: Deansideclized. Sun May 26 19:39:53 1996 Ulrich Drepper <drepper@cygnus.com> * intl/loadmsgcat.c (_nl_load_domain): Test correct variable after malloc. * string/Makefile (tester-ENV): New variable to suppress message translation in test. * string/tester.c: Add tests for strtok_r and strsep. * sysdeps/i386/i486/strcat.S: Correct some more 8bit operation <-> 32 bit operand conflicts. * sysdeps/i386/strsep.S: Wrapper around <sysdeps/i386/strtok.S> to produce strsep function. * sysdeps/i386/strtok.S: Optimized implementation of strtok function. * sysdeps/i386/strtok_r.S: Wrapper around <sysdeps/i386/strtok.S> to produce strtok_r function. * sysdeps/generic/strtok.c: Moved here from string/strtok.c. Corrected example in comment. * string/Makefile (routines): Add strtok_r. * sysdeps/generic/strtok_r.c: New file. Implement reentrant version of strtok_r. * string/string.h: Add prototype for strtok_r. * wcsmbs/wcstok.c: Handle illegal SAVE_PTR argument the same as in strtok_r. Sun May 26 13:28:23 1996 Roland McGrath <roland@delasyd.gnu.ai.mit.edu> * time/tzset.c (__tzset): Ignore leading : in $TZ; always try tzfile first and fall back to 1003.1 syntax only if it fails. * time/Makefile (install-others): Also install posix/ZONE and right/ZONE for each ZONE in $(zonenames). (z.% rule): Generate rules for right/ZONE and posix/ZONE targets too, the difference begin leapseconds vs /dev/null as 3rd dep. For original ZONE targets use $(leapseconds), to be set in Makeconfig. (target-zone-flavor): New variable. (tzcompile): Use it to get the right -d for posix/ and right/ flavors. * Makeconfig (leapseconds): New variable. * mach/Machrules (%.udeps rule): Depend on Machrules. Emit deps for .uh and .__h files. (%.uh, %.__h rules): Don't depend on %.defs; use #include <$*.defs> instead. Sun May 26 01:06:47 1996 Ulrich Drepper <drepper@cygnus.com> * stdlib/Makefile (routines): Add llabs, lldiv. * stdlib/llabs.c: New file. Implementation of return absolute value of long long argument. * stdlib/lldiv.c: New file. Implementation of division with remainder of long long argument. * stdlib/stdlib.h [__USE_GNU] (lldiv_t): New type for lldiv function. Define prototypes for lldiv and llabs functions. * locale/C-collate.c: Initialize _NL_COLLATE_NRULES element. * stdlib/strtod.c: Replace wchar_t with wint_t. The later is really the type for a single wide character. * string/strxfrm.c (print_val): Define separate version for use as wcsxfrm. Here we don't need UTF8 encoding. * wcsmbs/wchar.h: gcc-2.7.2-960517 finally introduces wint_t in <stddef.h>. Use this value and only for older gcc version define in place. (uwchar_t): Remove definition. * wcsmbs/wcscmp.c, wcsmbs/wcscoll.c, wcsmbs/wcsncmp.c, wcsmbs/wcsxfrm.c, wcsmbs/wmemcmp.c: : Don't use uwchar_t as unsigned type. wint_t is intended for this. Sat May 25 14:10:19 1996 Roland McGrath <roland@delasyd.gnu.ai.mit.edu> * sysdeps/unix/bsd/direntry.h: Use [1] instead of [0] for d_name to quiet -ansi -pedantic. * sysdeps/unix/common/direntry.h: Likewise. * login/Makefile (headers): Add lastlog.h. * login/lastlog.h: New file. * login/Makefile (CFLAGS): Don't append -D_THREAD_SAFE. * login/utmp.h [_REENTRANT || _THREAD_SAFE]: Replace this conditional with #ifdef __USE_REENTRANT. * features.h (__GNU_LIBRARY__): Set to 6. [_GNU_SOURCE] (_POSIX_SOURCE, _POSIX_C_SOURCE, _BSD_SOURCE, _SVID_SOURCE): Make sure they are all defined. * sysdeps/unix/sysv/linux/gnu/types.h: Instead of including <linux/posix_types.h>, define _LINUX_TYPES_DONT_EXPORT and then include <linux/types.h>. * resource/sys/resource.h: Remove trailing commas from enums. * sysdeps/generic/netinet/in.h: Remove trailing commas from enums. * sysdeps/unix/sysv/linux/netinet/in.h: Likewise.
Diffstat (limited to 'stdlib/lldiv.c')
-rw-r--r-- | stdlib/lldiv.c | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/stdlib/lldiv.c b/stdlib/lldiv.c new file mode 100644 index 0000000000..1659e0f837 --- /dev/null +++ b/stdlib/lldiv.c @@ -0,0 +1,57 @@ +/* `long long int' divison with remainder. +Copyright (C) 1992, 1996 Free Software Foundation, Inc. +This file is part of the GNU C Library. + +The GNU C Library is free software; you can redistribute it and/or +modify it under the terms of the GNU Library General Public License as +published by the Free Software Foundation; either version 2 of the +License, or (at your option) any later version. + +The GNU C Library is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +Library General Public License for more details. + +You should have received a copy of the GNU Library General Public +License along with the GNU C Library; see the file COPYING.LIB. If +not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, +Boston, MA 02111-1307, USA. */ + +#include <stdlib.h> + + +/* Return the `lldiv_t' representation of NUMER over DENOM. */ +lldiv_t +lldiv (numer, denom) + long long int numer; + long long int denom; +{ + lldiv_t result; + + result.quot = numer / denom; + result.rem = numer % denom; + + /* The ANSI standard says that |QUOT| <= |NUMER / DENOM|, where + NUMER / DENOM is to be computed in infinite precision. In + other words, we should always truncate the quotient towards + zero, never -infinity. Machine division and remainer may + work either way when one or both of NUMER or DENOM is + negative. If only one is negative and QUOT has been + truncated towards -infinity, REM will have the same sign as + DENOM and the opposite sign of NUMER; if both are negative + and QUOT has been truncated towards -infinity, REM will be + positive (will have the opposite sign of NUMER). These are + considered `wrong'. If both are NUM and DENOM are positive, + RESULT will always be positive. This all boils down to: if + NUMER >= 0, but REM < 0, we got the wrong answer. In that + case, to get the right answer, add 1 to QUOT and subtract + DENOM from REM. */ + + if (numer >= 0 && result.rem < 0) + { + ++result.quot; + result.rem -= denom; + } + + return result; +} |