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8 years agoparse-datetime: restrict debug output to input string
Pádraig Brady [Thu, 8 Sep 2016 14:17:10 +0000 (15:17 +0100)]
parse-datetime: restrict debug output to input string

* lib/parse-datetime.y (parse_datetime2): If we parse
all of the input but determine it's invalid, ensure
we don't output the now invalid input pointer.
This issue was seen with `date -d 'now +1'`.

8 years agoflexmember: new macro FLEXALIGNOF
Paul Eggert [Wed, 7 Sep 2016 23:42:13 +0000 (16:42 -0700)]
flexmember: new macro FLEXALIGNOF

* lib/flexmember.h: Include <stddef.h>, for offsetof.
(FLEXALIGNOF): Rename from _GL_XALLOC_ALIGNOF, as Emacs can use
this macro.  Update comments.

8 years agogetprogname: port to systems with __argv (mingw, msvc)
Jim Meyering [Wed, 7 Sep 2016 14:57:47 +0000 (07:57 -0700)]
getprogname: port to systems with __argv (mingw, msvc)

* lib/getprogname.c (getprogname): Include "dirname.h" and use
last_component: more general than open coding it with hard-coded "/".
* lib/getprogname.h (getprogname): Prefer "char const *" consistently.
* modules/getprogname (Depends-on): Add dirname-lgpl.
(configure.ac): Check for __argv in <stdlib.h>.
* modules/getprogname-tests: New file.
* tests/test-getprogname.c: New file.
Suggested by Gisle Vanem in
https://lists.gnu.org/archive/html/bug-gnulib/2016-09/msg00014.html

8 years agoflexmember: port better to GCC + valgrind
Paul Eggert [Wed, 7 Sep 2016 09:01:42 +0000 (02:01 -0700)]
flexmember: port better to GCC + valgrind

With a char[] flexible array member in a struct with nontrivial
alignment, GCC-generated code can access past the end of the
array, because GCC assumes there are padding bytes to get the
struct aligned.  So the common idiom of malloc (offsetof (struct
s, m), n) does not properly allocate an n-byte trailing member, as
malloc’s argument should be the next multiple of alignof (struct s).
See GCC Bug#66661: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66661
Although C11 apparently permits this GCC optimization (i.e., there
was a bug in Gnulib not in GCC), possibly this is a defect in C11.
See the thread containing:
https://gcc.gnu.org/ml/gcc-patches/2016-09/msg00317.html
* lib/flexmember.h: New file.
* lib/fnmatch.c, lib/fts.c, lib/glob.c, lib/idcache.c:
* lib/localename.c, lib/time_rz.c:
Include flexmember.h.
* lib/fnmatch_loop.c (struct patternlist):
* lib/localename.c (struct hash_node):
Use FLEXIBLE_ARRAY_MEMBER.
* lib/fnmatch_loop.c (EXT):
* lib/fts.c (fts_alloc):
* lib/glob.c (glob_in_dir):
* lib/idcache.c (getuser, getuidbyname, getgroup, getgidbyname):
* lib/localename.c (gl_lock_define_initialized):
* lib/time_rz.c (tzalloc):
Use FLEXSIZEOF instead of offsetof.
* m4/flexmember.m4 (AC_C_FLEXIBLE_ARRAY_MEMBER):
Check that the size of the struct can be taken.
* modules/flexmember (Files): Add lib/flexmember.h.
* modules/fnmatch, modules/glob, modules/localename (Depends-on):
Add flexmember.

8 years agogetprogname: port to Solaris 10
Paul Eggert [Wed, 7 Sep 2016 06:56:26 +0000 (23:56 -0700)]
getprogname: port to Solaris 10

* lib/getprogname.c: Include stdlib.h, for getexecname decl.
(getprogname) [HAVE_GETEXECNAME]: Use that, for Solaris 10.
* m4/getprogname.m4 (gl_FUNC_GETPROGNAME): Check for getexecname.

8 years agostdalign: correct mistake in alignof doc
Paul Eggert [Tue, 6 Sep 2016 21:26:05 +0000 (14:26 -0700)]
stdalign: correct mistake in alignof doc

Problem reported by Joseph Myers in:
https://gcc.gnu.org/ml/gcc-patches/2016-09/msg00340.html
* doc/posix-headers/stdalign.texi: Do not imply that C11 prohibits
alignof(S) where S is a structure containing a flexible array
member.  The Gnulib substitute does not support this, but C11 does.

8 years agogetprogname.h: declare with _GL_ATTRIBUTE_PURE, when required
Jim Meyering [Tue, 6 Sep 2016 04:40:57 +0000 (21:40 -0700)]
getprogname.h: declare with _GL_ATTRIBUTE_PURE, when required

* lib/getprogname.h (getprogname) [HAVE_DECL_PROGRAM_INVOCATION_NAME]:
Declare with _GL_ATTRIBUTE_PURE, to avoid warning from gcc's
-Wsuggest-attribute=pure

8 years agomain.mk: remove sc_program_name
Pino Toscano [Thu, 18 Aug 2016 13:18:25 +0000 (15:18 +0200)]
main.mk: remove sc_program_name

There is no more need to use set_program_name in tools (getprogname
is enough for most of the cases).
* cfg.mk (local-checks-to-skip): Remove sc_program_name.
* top/maint.mk (sc_program_name): Remove.

8 years agoPort tests away from progname
Pino Toscano [Thu, 18 Aug 2016 13:18:24 +0000 (15:18 +0200)]
Port tests away from progname

Modules that need the program name already
depend on getprogname.
* modules/acl-tests (Depends-on): Remove progname.
* modules/argmatch (Depends-on): Likewise.
* modules/argmatch-tests (Depends-on): Likewise.
* modules/argp-tests (Depends-on): Likewise.
* modules/argp-version-etc-tests (Depends-on): Likewise.
* modules/array-list-tests (Depends-on): Likewise.
* modules/array-oset-tests (Depends-on): Likewise.
* modules/avltree-list-tests (Depends-on): Likewise.
* modules/avltree-oset-tests (Depends-on): Likewise.
* modules/avltreehash-list-tests (Depends-on): Likewise.
* modules/carray-list-tests (Depends-on): Likewise.
* modules/copy-file-tests (Depends-on): Likewise.
* modules/exclude-tests (Depends-on): Likewise.
* modules/fchownat-tests (Depends-on): Likewise.
* modules/fdopendir-tests (Depends-on): Likewise.
* modules/filenamecat-tests (Depends-on): Likewise.
* modules/fstatat-tests (Depends-on): Likewise.
* modules/fstrcmp-tests (Depends-on): Likewise.
* modules/linked-list-tests (Depends-on): Likewise.
* modules/linkedhash-list-tests (Depends-on): Likewise.
* modules/mkdirat-tests (Depends-on): Likewise.
* modules/nonblocking-pipe-tests (Depends-on): Likewise.
* modules/nonblocking-socket-tests (Depends-on): Likewise.
* modules/obstack-printf-tests (Depends-on): Likewise.
* modules/openat-tests (Depends-on): Likewise.
* modules/parse-datetime-tests (Depends-on): Likewise.
* modules/pipe-filter-gi-tests (Depends-on): Likewise.
* modules/pipe-filter-ii-tests (Depends-on): Likewise.
* modules/quotearg-simple-tests (Depends-on): Likewise.
* modules/quotearg-tests (Depends-on): Likewise.
* modules/rbtree-list-tests (Depends-on): Likewise.
* modules/rbtree-oset-tests (Depends-on): Likewise.
* modules/rbtreehash-list-tests (Depends-on): Likewise.
* modules/spawn-pipe-tests (Depends-on): Likewise.
* modules/system-quote-tests (Depends-on): Likewise.
* modules/uniname/uniname-tests (Depends-on): Likewise.
* modules/uninorm/nfc-tests (Depends-on): Likewise.
* modules/uninorm/nfd-tests (Depends-on): Likewise.
* modules/uninorm/nfkc-tests (Depends-on): Likewise.
* modules/uninorm/nfkd-tests (Depends-on): Likewise.
* modules/unistdio/u16-vsnprintf-tests (Depends-on): Likewise.
* modules/unistdio/u16-vsprintf-tests (Depends-on): Likewise.
* modules/unistdio/u32-vsnprintf-tests (Depends-on): Likewise.
* modules/unistdio/u32-vsprintf-tests (Depends-on): Likewise.
* modules/unistdio/u8-vsnprintf-tests (Depends-on): Likewise.
* modules/unistdio/u8-vsprintf-tests (Depends-on): Likewise.
* modules/unistdio/ulc-vsnprintf-tests (Depends-on): Likewise.
* modules/unistdio/ulc-vsprintf-tests (Depends-on): Likewise.
* modules/unlinkat-tests (Depends-on): Likewise.
* modules/version-etc-tests (Depends-on): Likewise.
* modules/xalloc-die-tests (Depends-on): Likewise.
* modules/xmemdup0-tests (Depends-on): Likewise.
* modules/xprintf-posix-tests (Depends-on): Likewise.
* modules/xvasprintf-tests (Depends-on): Likewise.
* tests/test-argmatch.c: Do not include progname.h.
(main) Stop calling set_program_name.
* tests/test-argp-version-etc.c: Likewise.
* tests/test-argp.c: Likewise.
* tests/test-argv-iter.c: Likewise.
* tests/test-array_list.c: Likewise.
* tests/test-array_oset.c: Likewise.
* tests/test-avltree_list.c: Likewise.
* tests/test-avltree_oset.c: Likewise.
* tests/test-avltreehash_list.c: Likewise.
* tests/test-carray_list.c: Likewise.
* tests/test-copy-acl.c: Likewise.
* tests/test-copy-file.c: Likewise.
* tests/test-exclude.c: Likewise.
* tests/test-fchownat.c: Likewise.
* tests/test-fdopendir.c: Likewise.
* tests/test-filenamecat.c: Likewise.
* tests/test-fstatat.c: Likewise.
* tests/test-fstrcmp.c: Likewise.
* tests/test-linked_list.c: Likewise.
* tests/test-linkedhash_list.c: Likewise.
* tests/test-mkdirat.c: Likewise.
* tests/test-nonblocking-pipe-main.c: Likewise.
* tests/test-nonblocking-socket-main.c: Likewise.
* tests/test-obstack-printf.c: Likewise.
* tests/test-openat.c: Likewise.
* tests/test-parse-datetime.c: Likewise.
* tests/test-pipe-filter-gi1.c: Likewise.
* tests/test-pipe-filter-gi2-main.c: Likewise.
* tests/test-pipe-filter-ii1.c: Likewise.
* tests/test-pipe-filter-ii2-main.c: Likewise.
* tests/test-quotearg-simple.c: Likewise.
* tests/test-quotearg.c: Likewise.
* tests/test-rbtree_list.c: Likewise.
* tests/test-rbtree_oset.c: Likewise.
* tests/test-rbtreehash_list.c: Likewise.
* tests/test-sameacls.c: Likewise.
* tests/test-set-mode-acl.c: Likewise.
* tests/test-spawn-pipe-main.c: Likewise.
* tests/test-system-quote-main.c: Likewise.
* tests/test-unlinkat.c: Likewise.
* tests/test-version-etc.c: Likewise.
* tests/test-xalloc-die.c: Likewise.
* tests/test-xfprintf-posix.c: Likewise.
* tests/test-xmemdup0.c: Likewise.
* tests/test-xprintf-posix.c: Likewise.
* tests/test-xvasprintf.c: Likewise.
* tests/uniname/test-uninames.c: Likewise.
* tests/uninorm/test-u32-nfc-big.c: Likewise.
* tests/uninorm/test-u32-nfd-big.c: Likewise.
* tests/uninorm/test-u32-nfkc-big.c: Likewise.
* tests/uninorm/test-u32-nfkd-big.c: Likewise.
* tests/unistdio/test-u16-vsnprintf1.c: Likewise.
* tests/unistdio/test-u16-vsprintf1.c: Likewise.
* tests/unistdio/test-u32-vsnprintf1.c: Likewise.
* tests/unistdio/test-u32-vsprintf1.c: Likewise.
* tests/unistdio/test-u8-vsnprintf1.c: Likewise.
* tests/unistdio/test-u8-vsprintf1.c: Likewise.
* tests/unistdio/test-ulc-vsnprintf1.c: Likewise.
* tests/unistdio/test-ulc-vsprintf1.c: Likewise.
* tests/test-c-stack.c: (program_name): Do not define.
(main): Do not set program_name.
* tests/test-closein.c: Likewise.
* tests/test-xstrtol.c: Likewise.
* tests/test-yesno.c: Likewise.

8 years agoPort modules to use getprogname explicitly
Pino Toscano [Thu, 18 Aug 2016 13:18:23 +0000 (15:18 +0200)]
Port modules to use getprogname explicitly

... instead of requiring progname to be used (or program_name to be
provided).
* lib/argmatch.c: Do not include progname.h.
[TEST] (program_name): Do not define.
[TEST] (main): Call getprogname instead of using program_name.
* lib/c-stack.c: Do not include progname.h.
(program_name): Do not define.
(die): Call getprogname instead of using program_name.
* lib/chdir-long.c: Do not include progname.h.
[TEST_CHDIR] (main): Do not set program_name.
* lib/error.c [!_LIBC]: Include progname.h.
[!_LIBC] (program_name): Define using getprogname.
* lib/euidaccess.c: Do not include progname.h.
[TEST] (main): Do not set program_name.
* lib/git-merge-changelog.c: Include getprogname.h instead of
progname.h.
(usage): Call getprogname instead of using program_name.
(main): Likewise.  Stop calling set_program_name.
* lib/group-member.c: Do not include progname.h.
[TEST] (main): Do not set program_name.
* modules/argmatch (Depends-on): Add getprogname.
* modules/c-stack (Depends-on): Likewise.
* modules/error (Depends-on): Likewise.
* modules/git-merge-changelog (Depends-on): Likewise.
Also remove progname.

8 years agogetprogname: new module
Pino Toscano [Thu, 18 Aug 2016 13:18:22 +0000 (15:18 +0200)]
getprogname: new module

This provides a LGPL module for getting the name of the current
program, using the same API found on *BSD systems.
* lib/getprogname.c, lib/getprogname.h, m4/getprogname.m4:
* modules/getprogname: New files.
* MODULES.html.sh (Misc): Add getprogname.
* NEWS: Document the deprecation of the 'progname' module.

8 years agoautoupdate
Karl Berry [Mon, 5 Sep 2016 13:39:15 +0000 (06:39 -0700)]
autoupdate

8 years agomanywarnings: add -fno-common
Jim Meyering [Fri, 2 Sep 2016 16:16:16 +0000 (09:16 -0700)]
manywarnings: add -fno-common

* m4/manywarnings.m4 (gl_MANYWARN_ALL_GCC): Add -fno-common
to the list.  Quoting the manual, "Compiling with -fno-common is
useful on targets for which it provides better performance, or if
you wish to verify that the program will work on other systems that
always treat uninitialized variable declarations this way [putting
it in the data section]."  If diffutils had been using this sooner,
it would have prevented this duplicate declaration issue:
http://git.sv.gnu.org/cgit/diffutils.git/commit/?id=v3.4-10-gc2dc91f

8 years agoparse-datetime: Fix typo.
Simon Josefsson [Wed, 31 Aug 2016 12:27:04 +0000 (14:27 +0200)]
parse-datetime: Fix typo.

* lib/parse-datetime.y (parse_datetime2): Fix typo.

8 years agointprops: tune INT_NEGATE_OVERFLOW for GCC 5 and 6
Paul Eggert [Tue, 30 Aug 2016 19:29:21 +0000 (12:29 -0700)]
intprops: tune INT_NEGATE_OVERFLOW for GCC 5 and 6

* lib/intprops.h (INT_NEGATE_OVERFLOW): Tune for platforms like
GCC 5 and 6 that have __builtin_sub_overflow but not
__builtin_sub_overflow_p.  With the recent changes, these
platforms are a tiny bit faster with the INT_NEGATE_RANGE_OVERFLOW
implementation than with INT_SUBTRACT_OVERFLOW implementation,
since the former needs just one runtime comparison whereas the
latter needs two.

8 years agostrverscmp: sync with glibc
Paul Eggert [Tue, 30 Aug 2016 15:23:44 +0000 (08:23 -0700)]
strverscmp: sync with glibc

Although this doesn't exactly synchronize with glibc
byte-for-byte, it makes the code behave the same as glibc.
* lib/strverscmp.c (S_I, S_F, S_Z): Now masks, not powers of 2.
(ISDIGIT): Remove, as glibc is sticking with isdigit, and the
difference shouldn't matter in practical use.  All uses changed
back to isdigit.
(__strverscmp, strverscmp): Use new glibc method for weak aliases.
(next_state): Now unsigned char array; redo elements.
(result_type): Now signed char array; redo elements.
(__strverscmp): Fix glibc bug 9913 by using new states.
* tests/test-strverscmp.c (main): Test glibc bug 9913.

8 years agoxalloc-oversized.h: port __builtin_mul_overflow change to GCC 6.2.0
Jim Meyering [Mon, 29 Aug 2016 23:33:43 +0000 (16:33 -0700)]
xalloc-oversized.h: port __builtin_mul_overflow change to GCC 6.2.0

* lib/xalloc-oversized.h: Port this change to GCC 6.2.0, too,
similarly to how it was done to intprops.h.

8 years agointprops.h: port recent changes to GCC 6.2.0
Paul Eggert [Mon, 29 Aug 2016 19:03:51 +0000 (12:03 -0700)]
intprops.h: port recent changes to GCC 6.2.0

* lib/intprops.h (__has_builtin): Move earlier.
(_GL_HAS_BUILTIN_OVERFLOW): Rename from
_GL_HAS_BUILTIN_OVERFLOW_WITH_NULL and don't worry about whether
the last argument can be null.  All uses changed.
(_GL_HAS_BUILTIN_OVERFLOW_P): Also test __has_builtin.
(_GL_ADD_OVERFLOW, _GL_SUBTRACT_OVERFLOW, _GL_MULTIPLY_OVERFLOW):
Don't try to use 3rd arg null, as this doesn't work on GCC 6.2.0
and it's not clear which GCC versions it works for.
(_GL_INT_OP_WRAPV): Use _GL_HAS_BUILTIN_OVERFLOW instead of
its definiens.

8 years agointprops.h: use __typeof__ with GCC 7
Paul Eggert [Mon, 29 Aug 2016 17:08:32 +0000 (10:08 -0700)]
intprops.h: use __typeof__ with GCC 7

* lib/intprops.h (_GL_ADD_OVERFLOW, _GL_SUBTRACT_OVERFLOW)
(_GL_MULTIPLY_OVERFLOW): Use __typeof__ as in the GCC manual.
This avoids computing the expression's value (which might overflow!).

8 years agointprops.h, xalloc-oversized.h: work with gcc 7
Jim Meyering [Mon, 29 Aug 2016 16:45:18 +0000 (09:45 -0700)]
intprops.h, xalloc-oversized.h: work with gcc 7

In gcc 6, __builtin_add_overflow, __builtin_sub_overflow and
__builtin_mul_overflow each accept a NULL pointer as the third
argument.  However in gcc 7, that is no longer accepted.
Instead, one must use the "_p"-suffixed names, with which, the
third parameter is no longer a pointer.
* lib/intprops.h (_GL_HAS_BUILTIN_OVERFLOW_WITH_NULL): Correct
the definition: not true for gcc 7 and subsequent.
(_GL_HAS_BUILTIN_OVERFLOW_P): Define.
(_GL_ADD_OVERFLOW, _GL_SUBTRACT_OVERFLOW, _GL_MULTIPLY_OVERFLOW):
Provide new definitions for gcc 7 and subsequent.
* lib/xalloc-oversized.h (xalloc_oversized): Provide a definition
that works with gcc-7.

8 years agointprops.h: fix missing-backslash problems
Jim Meyering [Mon, 29 Aug 2016 16:27:50 +0000 (09:27 -0700)]
intprops.h: fix missing-backslash problems

* lib/intprops.h (_GL_ADD_OVERFLOW): Add backslash.
(_GL_SUBTRACT_OVERFLOW,_GL_MULTIPLY_OVERFLOW): Likewise.

8 years agoautoupdate
Karl Berry [Fri, 26 Aug 2016 13:33:31 +0000 (06:33 -0700)]
autoupdate

8 years agointprops: fix paren typo on old platforms
Paul Eggert [Thu, 25 Aug 2016 05:24:48 +0000 (22:24 -0700)]
intprops: fix paren typo on old platforms

Problem reported by John E. Malmberg in: https://bugs.gnu.org/24300#13
* lib/intprops.h (_GL_INT_OP_WRAPV_LONGISH)
[__GNUC__ < 5 && !__has_builtin (__builtin_add_overflow)
&& (__STDC_VERSION__ < 201112 || _GL__GENERIC_BOGUS)
&& !defined LLONG_MAX]:
Remove stray paren.

8 years agointprops: port to OpenVMS
Paul Eggert [Thu, 25 Aug 2016 03:48:32 +0000 (20:48 -0700)]
intprops: port to OpenVMS

Problem reported by John E. Malmberg in: https://bugs.gnu.org/24300
* doc/posix-headers/limits.texi: Document the problem.
* lib/intprops.h (LLONG_MAX, LLONG_MIN) [__INT64_MAX]:
Define if not already defined.

8 years agoparse-datetime: improve debug implementation
Assaf Gordon [Mon, 15 Aug 2016 01:29:50 +0000 (21:29 -0400)]
parse-datetime: improve debug implementation

Follow-up to commit 12ad79069 ("add optional debug printing").
Improve parse-datetime's debug implementation: remove macros,
replace global debug flag variable with a function parameter,
use nstrftime for formatting.
See: https://lists.gnu.org/archive/html/bug-gnulib/2016-08/msg00021.html

* lib/parse-datetime.h: (parse_datetime_debug): Remove global extern
declaration.
(parse_datetime2): New function, accepts 'flags' parameter, supporting
debug flag. Existing interface 'parse_datetime' left unmodified.
* lib/parse-datetime.c: (parse_datetime_debug): Remove global variable.
(struct parser_control): add 'parse_datetime_debug' member variable.
(parse_datetime): Call new function 'parse_datetime2' without debug.
(parse_datetime2): Adapted from previous 'parse_datetime', initialize
pc.parse_datetime_debug variable as needed.
(to_year): Accept new flags parameter, instead of using global variable.
(debug_print_current_time,debug_print_relative_time,debug_mktime_not_ok):
use struct 'debug' variable instead of global variable.
(DEBUG,DEBUG_PRINT_CURRENT_TIME,DEBUG_PRINT_RELATIVE_TIME,
DEBUG_MKTIME_NOT_OK,PROGRESS,PROGRESS0): Remove macros. Call
correspnding functions directly instead of using macros.
* modules/parse-datetime: Add gnulib's strftime module.

8 years agoc-strcase-tests: port to EBCDIC
Daniel Richard G [Fri, 19 Aug 2016 19:24:03 +0000 (12:24 -0700)]
c-strcase-tests: port to EBCDIC

* tests/test-c-strncasecmp.c: Allow two c_strncasecmp calls
which assume ASCII encoding semantics to run only in ASCII
mode, as they fail in EBCDIC.

8 years agosigpipe-tests: fix typo
Daniel Richard G [Fri, 19 Aug 2016 19:22:13 +0000 (12:22 -0700)]
sigpipe-tests: fix typo

* tests/test-sigpipe.sh: C, not B.

8 years agocanonicalize-lgpl: fix errno after malloca fails
Paul Eggert [Thu, 18 Aug 2016 18:56:07 +0000 (11:56 -0700)]
canonicalize-lgpl: fix errno after malloca fails

This fixes a typo I recently introduced.  Suggested by Bruno Haible in:
http://lists.gnu.org/archive/html/bug-gnulib/2016-08/msg00039.html
* lib/canonicalize-lgpl.c (__realpath):
Don't assume malloca sets errno on failure.

8 years agostrtod: port errno handling to z/OS
Paul Eggert [Thu, 18 Aug 2016 00:38:05 +0000 (17:38 -0700)]
strtod: port errno handling to z/OS

* lib/strtod.c (strtod): Save and restore errno more reliably.

8 years agostrtod: port to z/OS
Daniel Richard G [Thu, 18 Aug 2016 00:36:24 +0000 (17:36 -0700)]
strtod: port to z/OS

* lib/strtod.c (strtod): Address a couple quirks in the z/OS
implementation.

strtod: port to z/OS
* lib/strtod.c (strtod): Address a couple quirks in the z/OS
implementation.

8 years agoregex, string: rename to avoid '__string'
Paul Eggert [Thu, 18 Aug 2016 00:24:11 +0000 (17:24 -0700)]
regex, string: rename to avoid '__string'

* lib/regex.h, lib/string.in.h: Do not use the identifier
'__string', as it is effectively reserved by string.h on z/OS.

8 years agoc-strcase-tests, wcwidth-tests: depend on c-ctype
Paul Eggert [Thu, 18 Aug 2016 00:18:22 +0000 (17:18 -0700)]
c-strcase-tests, wcwidth-tests: depend on c-ctype

* modules/c-strcase-tests, modules/wcwidth-tests (Depends-on):
Add c-ctype.

8 years agothread: port to z/OS
Daniel Richard G [Wed, 17 Aug 2016 23:59:39 +0000 (16:59 -0700)]
thread: port to z/OS

* lib/glthread/thread.c, lib/glthread/thread.h:
Rudimentary gl_thread support for z/OS.

8 years agomaint: port tests to z/OS errno behavior
Daniel Richard G [Wed, 17 Aug 2016 23:57:35 +0000 (16:57 -0700)]
maint: port tests to z/OS errno behavior

* tests/test-nonblocking-reader.h:
* tests/test-nonblocking-writer.h:
Accommodate z/OS errno code preferences. (I believe this should
still be within spec; IBM is good at following the letter if not
the spirit of such things.)

8 years agomaint: preprocessor changes to support z/OS
Daniel Richard G [Wed, 17 Aug 2016 23:55:13 +0000 (16:55 -0700)]
maint: preprocessor changes to support z/OS

* lib/alloca.in.h, lib/fnmatch.c, lib/get-rusage-as.c:
* lib/glob.c, lib/math.in.h, lib/ptsname_r.c:
* tests/infinity.h, tests/nan.h, tests/test-canonicalize-lgpl.c:
* tests/test-nonblocking-pipe.h:

8 years agofclose, strstr-simple, wchar: port to z/OS
Daniel Richard G [Wed, 17 Aug 2016 23:09:38 +0000 (16:09 -0700)]
fclose, strstr-simple, wchar: port to z/OS

* m4/fclose.m4, m4/strstr.m4, m4/wchar_h.m4:
Changes to the Autoconf M4 code to support z/OS.  Note that
fclose() is broken in a different way on z/OS than it is on other
systems, thus the special-case in fclose.m4.

8 years agoiconv_open-utf-tests, iconv-tests: port to EBCDIC
Daniel Richard G [Wed, 17 Aug 2016 23:05:02 +0000 (16:05 -0700)]
iconv_open-utf-tests, iconv-tests: port to EBCDIC

* tests/test-iconv-utf.c, tests/test-iconv.c:
Added appropriately conditional #pragmas so that the test strings
in test-iconv-utf.c are correctly interpreted in ASCII instead of
EBCDIC (i.e. 'J' == 0x4A and not 0xD1). This issue could be
addressed in a more portable way by simply rewriting all the ASCII
literal characters as octal escapes, but then you would lose the
partial readability that the strings have now. Also, iconv_open()
on z/OS does not recognize "ISO-8859-1", but "ISO8859-1" works.

8 years agoc-strcase-tests, wcwidth-tests: port to EBCDIC
Daniel Richard G [Wed, 17 Aug 2016 22:58:01 +0000 (15:58 -0700)]
c-strcase-tests, wcwidth-tests: port to EBCDIC

* tests/test-c-strcasecmp.c: Include c-ctype.h.
(main) [!C_CTYPE_ASCII]: Skip tests that assume ASCII.
* tests/test-wcwidth.c: Likewise.

8 years agostdbool: don't require _Bool for C++
Paul Eggert [Wed, 17 Aug 2016 22:33:06 +0000 (15:33 -0700)]
stdbool: don't require _Bool for C++

Problem reported by David Seifert in:
http://lists.gnu.org/archive/html/bug-gnulib/2016-06/msg00005.html
* NEWS, doc/posix-headers/stdbool.texi (stdbool.h): Document this.
* m4/stdbool.m4 (AC_CHECK_HEADER_STDBOOL): Make the check
more-forgiving for C++, in that it requires only 'bool'.  Be a bit
stricter about checking that bool and _Bool are compatible in C.

8 years agogetdelim: remove dependency on realloc-posix
Paul Eggert [Wed, 17 Aug 2016 22:01:50 +0000 (15:01 -0700)]
getdelim: remove dependency on realloc-posix

* lib/canonicalize-lgpl.c (alloc_failed)
[!FUNC_REALPATH_WORKS || defined _LIBC]: New function,
(__realpath) [!FUNC_REALPATH_WORKS || defined _LIBC]: Use it.
Use __set_errno where needed, for consistency.
* lib/getdelim.c (alloc_failed): New function.
(getdelim): Use it.
* modules/getdelim (Depends-on): Remove realloc-posix.

8 years agoupdate from texinfo
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8 years agoupdate from texinfo
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8 years agoparse-datetime: add optional debug printing
Assaf Gordon [Sun, 7 Aug 2016 00:08:32 +0000 (20:08 -0400)]
parse-datetime: add optional debug printing

Print parsing information, warnings, and errors to stderr.

* lib/parse-datetime.h (parse_datetimte_debug): New global variable.
* lib/parse-datetime.y:
(DEBUG_*):  Macros calling debug functions if debugging is enabled.
(PROGRESS*): Same as DEBUG, for progress reporting.
(dbg_printf): Print message to stderr, with 'date' prefix.
(struct parser_control): Add 'debug_*_seen' variables.
(str_days): Converts day ordinal/number to string (e.g. 'last wed').
(debug_print_current_time, debug_print_relateive_time): Prints the
current/relative date/time value of parser_control.
(YACC parser syntax): Print parsed parts with DEBUG_* macros.
(to_year): Warn about 2-digit year parsing.
(yylex):   Warn about unrecognized words.
(get_effective_timezone): Returns current timezone in minutes.
(debug_strf{time,date,datetime}): Convert 'struct tm' to string as
clearly and unambigiously as possible.
(debug_mktime_not_ok): Print detailed information about failed
date/time values.
(parse_datetime): Add DEBUG messages for failures, warnings. Add
PROGRESS messages for status messages.
* modules/parse-datetime: Add 'timegm', 'gettext-h' dependencies.

8 years agoupdate from texinfo
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8 years agotests/init.sh: exclude dash with bad "local" semantics
Jim Meyering [Mon, 1 Aug 2016 16:37:15 +0000 (09:37 -0700)]
tests/init.sh: exclude dash with bad "local" semantics

* tests/init.sh (gl_shell_test_script_): Add a function to
eliminate a shell like "dash" (unlike bash, zsh) that has
surprising/risky "local var='...'" semantics.  Inspired by
the problem and discussion in https://bugs.gnu.org/24116#11.

8 years agoupdate from texinfo
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8 years agoupdate from texinfo
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8 years agoupdate from texinfo
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8 years agoupdate from texinfo
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8 years agomaint.mk: expand the prohibit_doubled_word regex
Ján Tomko [Tue, 2 Aug 2016 13:41:13 +0000 (15:41 +0200)]
maint.mk: expand the prohibit_doubled_word regex

This check has a static list of words that are checked for
repetitions.  Expand it before running the perl script to
avoid using expensive captures.  This decreases the cost
for libvirt from 1.66s to 0.66s.
* top/maint.mk (prohibit_doubled_word_expanded_): Define.
(sc_prohibit_doubled_word): Use it.

8 years agouseless-if-before-free: skip non-matching lines early
Ján Tomko [Mon, 1 Aug 2016 17:54:47 +0000 (10:54 -0700)]
useless-if-before-free: skip non-matching lines early

* build-aux/useless-if-before-free: First match each line with the
simple/quick /\bif\b/ and reject if there is no match. This often
saves the cost of the much more involved regular expression.
For libvirt, this decreases the cost from 1.44s to 1.02s.

8 years agoupdate from texinfo
Karl Berry [Tue, 2 Aug 2016 13:00:57 +0000 (06:00 -0700)]
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8 years agomaint.mk: speed up sc_po_check
Ján Tomko [Sat, 30 Jul 2016 05:39:31 +0000 (22:39 -0700)]
maint.mk: speed up sc_po_check

sc_po_check would skip files based on their names, or on the
existence of files with derived names. Rewrite it to use perl
instead of shell to make the check faster.
* top/maint.mk (perl_translatable_files_list_): Define.
(sc_po_check): Use it.

8 years agomaint.mk: speed up require_config_h_first
Ján Tomko [Tue, 26 Jul 2016 14:28:16 +0000 (16:28 +0200)]
maint.mk: speed up require_config_h_first

Instead of spawning three processes per file,
rewrite the check in perl and run it once for all the files.
* top/maint.mk (perl_config_h_first_): Define.
(sc_require_config_h_first): Use it in place of shell code.

8 years agomaint.mk: speed up sc_po_check
Ján Tomko [Sat, 30 Jul 2016 05:39:31 +0000 (22:39 -0700)]
maint.mk: speed up sc_po_check

sc_po_check would skip files based on their names, or on the
existence of files with derived names. Rewrite it to use perl
instead of shell to make the check faster.
* top/maint.mk (perl_translatable_files_list_): Define.
(sc_po_check): Use it.

8 years agoupdate from texinfo
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8 years agoupdate from texinfo
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8 years agoautoupdate
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8 years agoautoupdate
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8 years agoupdate from texinfo
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8 years agoautoupdate
Karl Berry [Tue, 19 Jul 2016 15:12:23 +0000 (08:12 -0700)]
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8 years agoupdate from texinfo
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8 years agoobstack: pacify GCC 6 with -Wnull-dereference
Paul Eggert [Fri, 15 Jul 2016 08:35:22 +0000 (10:35 +0200)]
obstack: pacify GCC 6 with -Wnull-dereference

Problem reported by Assaf Gordon in:
http://lists.gnu.org/archive/html/bug-gnulib/2016-07/msg00028.html
* lib/obstack.c, lib/obstack.h (obstack_alloc_failed_handler):
Declare with __attribute_noreturn__.
* lib/obstack.h (__attribute_noreturn__): New macro.

8 years agoupdate from texinfo
Karl Berry [Thu, 14 Jul 2016 15:36:45 +0000 (08:36 -0700)]
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8 years agodoc: mention glibc, OS X, Cygwin [S]SIZE_MAX buglet
Eric Blake [Wed, 13 Jul 2016 15:51:00 +0000 (09:51 -0600)]
doc: mention glibc, OS X, Cygwin [S]SIZE_MAX buglet

More platforms have similar bugs, and in the case of glibc on s390,
the bug is in SIZE_MAX instead of SSIZE_MAX.

* doc/posix-headers/stdint.texi (stdint.h): Document the bugs.
* doc/posix-headers/limits.texi (limits.h): Document the bugs.

Signed-off-by: Eric Blake <eblake@redhat.com>
8 years agodoc: mention glibc SSIZE_MAX buglet
Paul Eggert [Wed, 13 Jul 2016 09:42:40 +0000 (11:42 +0200)]
doc: mention glibc SSIZE_MAX buglet

* doc/posix-headers/limits.texi (limits.h): Document the bug.

8 years agoprintf-posix: Fix mingw build
Martin Kletzander [Mon, 4 Jul 2016 07:10:59 +0000 (09:10 +0200)]
printf-posix: Fix mingw build

Commit 54615b95ff238e235e806855efc46a9abad09f2e changed the regular
expression for detecting C symbol prefixes but forgot to qoute square
brackets in the command line arguments for grep.  That way when
building with mingw the condition was false although it ought to be
true instead.  In particular scenarios this led to the following
compile error:

    Cannot export rpl_printf: symbol not found
    Cannot export rpl_scanf: symbol not found
    collect2: error: ld returned 1 exit status

Fix this by properly quoting square brackets.

8 years agomktime: call tzset as per POSIX
Paul Eggert [Sun, 3 Jul 2016 10:59:54 +0000 (12:59 +0200)]
mktime: call tzset as per POSIX

Problem reported by Ludovic Courtès in:
http://lists.gnu.org/archive/html/bug-gnulib/2016-06/msg00068.html
* lib/mktime.c (mktime) [!_LIBC && HAVE_TZSET]: Call tzset.
* m4/mktime.m4 (gl_FUNC_MKTIME): Check for tzset.

8 years agofts: handle readdir() errors
Pádraig Brady [Wed, 22 Jun 2016 12:49:53 +0000 (13:49 +0100)]
fts: handle readdir() errors

* lib/fts.c (fts_build): readdir(3) returns NULL when finished,
but also upon error when it will also set errno.  Therefore
flag the error case from readdir().  We treat the case where
no items are read the same as if the dir can't be accessed,
i.e. by setting fts_errno to FTS_DNR.

The bug was initially reported by Peter Benie
http://bugzilla.opensuse.org/show_bug.cgi?id=984910
where it was mentioned that readdir() may fail
when an NFS server has a poor readdir cookie implementation.

8 years agointprops: port better to GCC 7
Paul Eggert [Fri, 24 Jun 2016 11:35:12 +0000 (13:35 +0200)]
intprops: port better to GCC 7

GCC 7 __builtin_add_overflow supports a new usage form, where the
last argument is a null pointer, and which merely returns 1 if an
overflow would occur.  This is a constant expression if all
arguments are constants, and should generate faster code when code
needs to be generated.
* lib/intprops.h (_GL_HAS_BUILTIN_OVERFLOW_WITH_NULL): New macro.
(_GL_ADD_OVERFLOW, _GL_SUBTRACT_OVERFLOW, _GL_MULTIPLY_OVERFLOW):
Use builtin operations if available.
(INT_NEGATE_OVERFLOW): Prefer INT_SUBTRACT_OVERFLOW if builtin
operations are available, as it's almost surely faster.

8 years agointprops-test: port to GCC 6
Paul Eggert [Thu, 23 Jun 2016 12:51:02 +0000 (14:51 +0200)]
intprops-test: port to GCC 6

* tests/test-intprops.c: Ignore -Woverflow if any GCC version,
since the bug is not fixed in GCC 6.1.

8 years agoautoupdate
Karl Berry [Mon, 20 Jun 2016 15:16:31 +0000 (08:16 -0700)]
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8 years agoupdate from texinfo
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8 years agoautoupdate
Karl Berry [Tue, 14 Jun 2016 16:05:27 +0000 (09:05 -0700)]
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8 years agoxalloc-oversized: port to GCC 7; fewer warnings
Paul Eggert [Mon, 13 Jun 2016 18:17:03 +0000 (11:17 -0700)]
xalloc-oversized: port to GCC 7; fewer warnings

GCC 7 will have a better way to deal with integer overflow.
Plus, fix a warnings problem reported by Tim Ruehsen in:
http://lists.gnu.org/archive/html/bug-gnulib/2016-06/msg00022.html
* lib/xalloc-oversized.h (__xalloc_oversized): New macro.
(xalloc_oversized): Use plain __builtin_mul_overflow if GCC 7 or later.
For GCC 5, use __xalloc_oversized if both args are constants,
or if pedantic.

8 years agoautoupdate (gettext-0.19.8.1)
Karl Berry [Mon, 13 Jun 2016 15:37:24 +0000 (08:37 -0700)]
autoupdate (gettext-0.19.8.1)

8 years agoupdate from texinfo
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8 years agoregex: port to Sun C
Paul Eggert [Wed, 8 Jun 2016 08:46:35 +0000 (01:46 -0700)]
regex: port to Sun C

Reported by Daiki Ueno.
* lib/regcomp.c (regcomp, regerror): Use _Restrict_, not
__restrict, in prototype.  This fixes a problem I introduced in
the 2016-02-19 merge from glibc.

8 years agoupdate from texinfo
Karl Berry [Sat, 4 Jun 2016 12:49:04 +0000 (05:49 -0700)]
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8 years agostdbool: Restore __bool_true_false_are_defined check
Paul Eggert [Tue, 31 May 2016 16:03:15 +0000 (09:03 -0700)]
stdbool: Restore __bool_true_false_are_defined check

* m4/stdbool.m4 (AC_CHECK_HEADER_STDBOOL):
__bool_true_false_are_defined is still defined, even with C++11.

8 years agostdbool: Port AC_CHECK_HEADER_STDBOOL to C++11
David Seifert [Mon, 30 May 2016 20:54:32 +0000 (22:54 +0200)]
stdbool: Port AC_CHECK_HEADER_STDBOOL to C++11

* m4/stdbool.m4 (AC_CHECK_HEADER_STDBOOL): Port to C++11.
Copyright-paperwork-exempt: true

8 years agoUse GCC_LINT, not lint
Paul Eggert [Mon, 30 May 2016 19:18:19 +0000 (12:18 -0700)]
Use GCC_LINT, not lint

FreeBSD and Cygwin #define _Noreturn to empty if 'lint' is defined.
Problem reported by Ken Brown in: http://bugs.gnu.org/23640
* doc/posix-headers/stdnoreturn.texi (stdnoreturn.h):
Document problem with lint and _Noreturn.
* lib/diffseq.h (IF_LINT, IF_LINT2):
* lib/fts.c (sccsid):
* lib/getndelim2.c (IF_LINT):
* lib/gl_anylinked_list2.h (gl_linked_iterator)
(gl_linked_iterator_from_to):
* lib/gl_anytree_list2.h (gl_tree_iterator)
(gl_tree_iterator_from_to):
* lib/gl_anytree_oset.h (gl_tree_iterator):
* lib/gl_array_list.c (gl_array_iterator)
(gl_array_iterator_from_to):
* lib/gl_array_oset.c (gl_array_iterator):
* lib/gl_carray_list.c (gl_carray_iterator)
(gl_carray_iterator_from_to):
* lib/idcache.c:
* lib/inet_ntop.c (IF_LINT):
* lib/regcomp.c (build_charclass_op, create_tree):
* lib/regex_internal.c (re_acquire_state)
(re_acquire_state_context):
* lib/trigl.c (rcsid):
* lib/trim.c (IF_LINT):
* lib/vasnprintf.c (IF_LINT):
* lib/verify.h (assume):
Treat GCC_LINT like lint.

8 years agosecure_getenv: Port to many more platforms.
Bruno Haible [Sun, 29 May 2016 10:54:32 +0000 (12:54 +0200)]
secure_getenv: Port to many more platforms.

* m4/secure_getenv.m4 (gl_PREREQ_SECURE_GETENV): Also check for get*id
functions.
* lib/secure_getenv.c (secure_getenv): Add alternate implementations
for non-BSD Unix platforms and for native Windows.
* doc/glibc-functions/secure_getenv.texi: Remove known issue.
Prompted by a request from Nikos Mavrogiannopoulos.

8 years agoupdate from texinfo
Karl Berry [Sat, 28 May 2016 15:39:46 +0000 (08:39 -0700)]
update from texinfo

8 years agocanonicalize: Fix broken probe for realpath.
Eric Blake [Fri, 27 May 2016 20:04:35 +0000 (14:04 -0600)]
canonicalize: Fix broken probe for realpath.

Noticed in libvirt due to rpl_canonicalize being compiled on
glibc where it used to rely on the libc version.

* m4/canonicalize.m4 (gl_FUNC_REALPATH_WORKS): Fix regression
in logic introduced in 54615b95.

Signed-off-by: Eric Blake <eblake@redhat.com>
8 years agounsetenv: relax to LGPLv2+
Eric Blake [Thu, 26 May 2016 14:47:27 +0000 (08:47 -0600)]
unsetenv: relax to LGPLv2+

Especially since setenv is also LGPLv2+, and it makes sense for the
two modules to stay in sync, rather than one to be usable only in
LPGLv3+ projects.

* modules/unsetenv (License): Match setenv license.

Signed-off-by: Eric Blake <eblake@redhat.com>
8 years agoupdate from texinfo
Paul Eggert [Thu, 26 May 2016 19:31:40 +0000 (12:31 -0700)]
update from texinfo

8 years agogendocs.sh: Set default TOP_NODE_UP_URL in HTML output.
Ludovic Courtès [Sat, 7 May 2016 17:15:26 +0000 (19:15 +0200)]
gendocs.sh: Set default TOP_NODE_UP_URL in HTML output.

Suggested by Gavin Smith <gavinsmith0123@gmail.com>.
Reported by myglc2 <myglc2@gmail.com> in <http://bugs.gnu.org/22651>.

* build-aux/gendocs.sh (MANUAL_TITLE, PACKAGE, EMAIL)
(commonarg, dirargs, dirs, infoarg, generate_ascii)
(generate_html, generate_info, generate_tex, outdir)
(source_extra, split, srcfile, texarg): Move above 'version'.
(htmlarg): Likewise, and add "-c TOP_NODE_UP_URL=/manual".

8 years agomanywarnings: update for GCC 6.1
Paul Eggert [Tue, 17 May 2016 16:08:02 +0000 (09:08 -0700)]
manywarnings: update for GCC 6.1

* m4/manywarnings.m4 (gl_MANYWARN_ALL_GCC):
Add GCC 6.1 options that apply to C.
* build-aux/gcc-warning.spec: Add GCC 6.1 options that
do not apply to C, are obsolescent, etc.

8 years agoautoupdate
Karl Berry [Mon, 16 May 2016 15:05:06 +0000 (08:05 -0700)]
autoupdate

8 years agointdiv0, memmem, nocrash, strcasestr, strstr: no exit
Nikos Mavrogiannopoulos [Fri, 13 May 2016 19:10:03 +0000 (12:10 -0700)]
intdiv0, memmem, nocrash, strcasestr, strstr: no exit

Do not call 'exit' in a signal handler, as this is not
portable.  Call '_exit' instead.  This addresses an issue with tests
not being terminated.

8 years agoglob: size_t overflow checks
Paul Eggert [Fri, 13 May 2016 06:08:22 +0000 (23:08 -0700)]
glob: size_t overflow checks

* lib/glob.c (__has_builtin): New macro.
(size_add_wrapv, glob_use_alloca): New static functions.
(glob, glob_in_dir): Check for size_t overflow in several places,
and fix some size_t checks that were not quite right.

8 years agoglob: don't assume INT_MAX < SIZE_MAX
Paul Eggert [Mon, 9 May 2016 15:53:10 +0000 (08:53 -0700)]
glob: don't assume INT_MAX < SIZE_MAX

* lib/glob.c (glob): Prefer SIZE_MAX to ~((size_t) 0), as the
latter is not portable to (probably theoretical) hosts where
SIZE_MAX <= INT_MAX.

8 years agoFix undefined behaviour in gettext.h.
Bruno Haible [Mon, 9 May 2016 07:29:35 +0000 (09:29 +0200)]
Fix undefined behaviour in gettext.h.

* lib/gettext.h (dcpgettext_expr, dcnpgettext_expr): Avoid accessing a
pointer's value after the storage it points to has been freed.
Reported by Michael Pyne in https://savannah.gnu.org/bugs/?47847.
Spotted by Coverity.

8 years agoautoupdate
Karl Berry [Wed, 11 May 2016 15:24:14 +0000 (08:24 -0700)]
autoupdate

9 years agogit-version-gen: avoid undefined shift
Paul Eggert [Sun, 8 May 2016 18:38:22 +0000 (11:38 -0700)]
git-version-gen: avoid undefined shift

Problem reported by Mosè Giordano in:
http://lists.gnu.org/archive/html/bug-gnulib/2016-05/msg00012.html
* build-aux/git-version-gen: Avoid undefined behavior if invoked
with --prefix or --fallback but without a later argument.  While
we're at it, omit unnecessary quotes.

9 years agoupdate from texinfo
Karl Berry [Sun, 8 May 2016 16:11:48 +0000 (09:11 -0700)]
update from texinfo

9 years agoglob: merge glibc changes into lib/glob.c
Paul Eggert [Wed, 4 May 2016 16:57:48 +0000 (09:57 -0700)]
glob: merge glibc changes into lib/glob.c

* lib/glob.c (glob_in_dir): Sync with glibc/posix/glob.c,
dated 2016-05-04 12:09:35 2016 +0200.  Here are the changes:
2016-05-04 CVE-2016-1234: glob: Do not copy d_name field of
  struct dirent [BZ #19779]
2016-04-29 glob: Simplify the interface for the GLOB_ALTDIRFUNC
  callback gl_readdir
2015-10-20 Convert miscellaneous function definitions to prototype style
2015-10-20 Convert 113 more function definitions to prototype style
  (files with assertions)
2015-06-12 Fix getlogin_r namespace (bug 18527).
2014-02-10 Use glibc_likely instead __builtin_expect.
2013-10-20 When glob pattern contains a trailing slash match only
  directories. Fixes bug 10278.
2013-09-04 glob: silence -Wattribute warnings
2013-06-07 Avoid use of "register" as optimization hint.
2012-09-25 Use size_t instead of int for internal variables in glob
  (bug 14621)
2011-07-20 Check for overflows in expressions
2011-05-28 Remove unused variable
2011-05-22 Add a few more alloca size checks
2010-03-27 Whitespace fixes
2010-03-27 Fix one more issue with the glob patch
2010-03-24 Fix glob with empty pattern
2008-05-27 Remove useless more "if" tests before "free"
* modules/glob (Depends-on): Add stdint.

9 years agomktime: spelling fix in comment
Paul Eggert [Mon, 2 May 2016 01:49:47 +0000 (18:49 -0700)]
mktime: spelling fix in comment

* lib/mktime.c: Fix spelling.

9 years agomktime: port to stricter signed overflow checking
Paul Eggert [Mon, 2 May 2016 00:25:16 +0000 (17:25 -0700)]
mktime: port to stricter signed overflow checking

* lib/mktime.c: Omit 'pragma GCC optimize ("wrapv")'.
(long_int): Require width for INT_MAX * 3 * (seconds per year),
instead of merely for INT_MAX * 2.  In practice platforms that
do the latter also do the former.
(TIME_T_MIN, TIME_T_MAX, TIME_T_MIDPOINT, SHR): Remove.
(shr): New static function, replacing SHR.  All uses changed.
(mktime_min, mktime_max): New constants, replacing TIME_T_MIN
and TIME_T_MAX.  All uses changed.
(ydhms_diff, guess_time_tm, ranged_convert, __mktime_internal):
Use long_int, not time_t.
(long_int_avg): New static function, replacing time_t_avg.
All uses changed.  Round toward positive infinity, as that
generates slightly better code.
(time_t_add_ok, time_t_int_add_ok): Remove.  All uses replaced
by INT_ADD_WRAPV.
(guess_time_tm): Accept time, not a pointer to it.  All uses changed.
(convert_time): New static function.
(ranged_convert): Use it
(ranged_convert): Check for *T out of [mktime_min, mktime_max] range.
Use simpler test for loop exit.
(__mktime_internal): Store negative of guessed offset, to simplify
overflow checking.  Remove no-longer-needed test for small time_t
overflows.