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getopt: merge from gnulib: function prototype adjustments
For standards compliance, getopt, getopt_long, and getopt_long_only in glibc have to take 'char *const *argv' even though they can mutate the array. gnulib has tried to clean this up as much as possible: all the internal functions use 'char **argv', and when used standalone, so do getopt_long and getopt_long_only. Also brought over are __nonnull annotations, corrections to documentation, and apparently it is no longer necessary to worry about conflicting prototypes for getopt. The macroification of the definitions of getopt and __posix_getopt goes beyond what is currently in gnulib. At this point getopt1.c and getopt_int.h are identical to their gnulib versions. * posix/getopt.h: Add backup definition of __nonnull for consistency with gnulib. Define __getopt_argv_const to const if not already defined. (getopt): Update doc comment from gnulib. Prototype unconditionally. Add __nonnull annotation. (__posix_getopt): Add __nonnull annotation. (getopt_long, getopt_long_only): Use __getopt_argv_const in prototypes for consistency with gnulib. Add __nonnull annotations. * posix/getopt.c (_getopt_initialize, _getopt_internal_r) (getopt_internal): Change 'argv' argument to type 'char **'. Remove now-unnecessary casts. (getopt, __posix_getopt): Eliminate repetition with a macro. Cast 'argv' to 'char **' when calling _getopt_internal. * posix/getopt1.c (getopt_long, getopt_long_only): Use __getopt_argv_const for consistency with gnulib. Cast 'argv' to 'char **' when calling _getopt_internal. (_getopt_long_r, _getopt_long_only_r): Change 'argv' argument to type 'char **'. (main): Constify 'long_options'. * posix/getopt_int.h (getopt_internal, _getopt_internal_r) (_getopt_long_r, _getopt_long_only_r): Change 'argv' argument to type 'char **'.
This commit is contained in:
Zack Weinberg
parent
544ce845de
commit
7a7be6c9a2
24
ChangeLog
24
ChangeLog
@ -1,5 +1,29 @@
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2017-04-07 Zack Weinberg <zackw@panix.com>
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* posix/getopt.h: Add backup definition of __nonnull for
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consistency with gnulib. Define __getopt_argv_const to const
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if not already defined.
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(getopt): Update doc comment from gnulib. Prototype
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unconditionally. Add __nonnull annotation.
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(__posix_getopt): Add __nonnull annotation.
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(getopt_long, getopt_long_only): Use __getopt_argv_const in
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prototypes for consistency with gnulib. Add __nonnull
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annotations.
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* posix/getopt.c (_getopt_initialize, _getopt_internal_r)
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(getopt_internal): Change 'argv' argument to type 'char **'.
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Remove now-unnecessary casts.
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(getopt, __posix_getopt): Eliminate repetition with a macro.
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Cast 'argv' to 'char **' when calling _getopt_internal.
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* posix/getopt1.c (getopt_long, getopt_long_only):
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Use __getopt_argv_const for consistency with gnulib.
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Cast 'argv' to 'char **' when calling _getopt_internal.
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(_getopt_long_r, _getopt_long_only_r):
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Change 'argv' argument to type 'char **'.
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(main): Constify 'long_options'.
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* posix/getopt_int.h (getopt_internal, _getopt_internal_r)
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(_getopt_long_r, _getopt_long_only_r):
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Change 'argv' argument to type 'char **'.
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* stdio-common/fxprintf.c (__fxprintf_nocancel): New function.
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(locked_vfxprintf): New helper function. Handle arbitrary
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multibyte strings, not just ASCII.
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@ -182,7 +182,7 @@ exchange (char **argv, struct _getopt_data *d)
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/* Initialize the internal data when the first call is made. */
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static const char *
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_getopt_initialize (int argc, char *const *argv, const char *optstring,
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_getopt_initialize (int argc, char **argv, const char *optstring,
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struct _getopt_data *d, int posixly_correct)
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{
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/* Start processing options with ARGV-element 1 (since ARGV-element 0
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@ -272,7 +272,7 @@ _getopt_initialize (int argc, char *const *argv, const char *optstring,
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long-named options. */
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int
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_getopt_internal_r (int argc, char *const *argv, const char *optstring,
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_getopt_internal_r (int argc, char **argv, const char *optstring,
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const struct option *longopts, int *longind,
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int long_only, struct _getopt_data *d, int posixly_correct)
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{
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@ -317,7 +317,7 @@ _getopt_internal_r (int argc, char *const *argv, const char *optstring,
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if (d->__first_nonopt != d->__last_nonopt
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&& d->__last_nonopt != d->optind)
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exchange ((char **) argv, d);
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exchange (argv, d);
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else if (d->__last_nonopt != d->optind)
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d->__first_nonopt = d->optind;
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@ -340,7 +340,7 @@ _getopt_internal_r (int argc, char *const *argv, const char *optstring,
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if (d->__first_nonopt != d->__last_nonopt
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&& d->__last_nonopt != d->optind)
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exchange ((char **) argv, d);
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exchange (argv, d);
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else if (d->__first_nonopt == d->__last_nonopt)
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d->__first_nonopt = d->optind;
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d->__last_nonopt = argc;
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@ -766,7 +766,7 @@ _getopt_internal_r (int argc, char *const *argv, const char *optstring,
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}
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int
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_getopt_internal (int argc, char *const *argv, const char *optstring,
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_getopt_internal (int argc, char **argv, const char *optstring,
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const struct option *longopts, int *longind, int long_only,
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int posixly_correct)
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{
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@ -786,32 +786,23 @@ _getopt_internal (int argc, char *const *argv, const char *optstring,
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return result;
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}
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/* glibc gets a LSB-compliant getopt.
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Standalone applications get a POSIX-compliant getopt. */
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#if _LIBC
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enum { POSIXLY_CORRECT = 0 };
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#else
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enum { POSIXLY_CORRECT = 1 };
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#endif
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int
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getopt (int argc, char *const *argv, const char *optstring)
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{
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return _getopt_internal (argc, argv, optstring,
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(const struct option *) 0,
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(int *) 0,
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0, POSIXLY_CORRECT);
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/* glibc gets a LSB-compliant getopt and a POSIX-complaint __posix_getopt.
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Standalone applications just get a POSIX-compliant getopt.
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POSIX and LSB both require these functions to take 'char *const *argv'
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even though this is incorrect (because of the permutation). */
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#define GETOPT_ENTRY(NAME, POSIXLY_CORRECT) \
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int \
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NAME (int argc, char *const *argv, const char *optstring) \
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{ \
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return _getopt_internal (argc, (char **)argv, optstring, \
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0, 0, 0, POSIXLY_CORRECT); \
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}
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#ifdef _LIBC
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int
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__posix_getopt (int argc, char *const *argv, const char *optstring)
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{
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return _getopt_internal (argc, argv, optstring,
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(const struct option *) 0,
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(int *) 0,
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0, 1);
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}
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GETOPT_ENTRY(getopt, 0)
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GETOPT_ENTRY(__posix_getopt, 1)
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#else
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GETOPT_ENTRY(getopt, 1)
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#endif
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@ -33,10 +33,11 @@
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# include <ctype.h>
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#endif
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#ifndef __THROW
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#ifndef __GNUC_PREREQ
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# define __GNUC_PREREQ(maj, min) (0)
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#endif
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#ifndef __THROW
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# if defined __cplusplus && __GNUC_PREREQ (2,8)
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# define __THROW throw ()
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# else
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@ -44,6 +45,14 @@
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# endif
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#endif
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#ifndef __nonnull
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# if __GNUC_PREREQ (3, 3)
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# define __nonnull(params) __attribute__ ((__nonnull__ params))
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# else
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# define __nonnull(params)
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# endif
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#endif
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#ifdef __cplusplus
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extern "C" {
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#endif
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@ -139,16 +148,18 @@ struct option
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scanning, explicitly telling 'getopt' that there are no more
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options.
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If OPTS begins with '--', then non-option arguments are treated as
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arguments to the option '\0'. This behavior is specific to the GNU
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'getopt'. */
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If OPTS begins with '-', then non-option arguments are treated as
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arguments to the option '\1'. This behavior is specific to the GNU
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'getopt'. If OPTS begins with '+', or POSIXLY_CORRECT is set in
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the environment, then do not permute arguments.
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For standards compliance, the 'argv' argument has the type
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char *const *, but this is inaccurate; if argument permutation is
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enabled, the argv array (not the strings it points to) must be
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writable. */
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#ifdef __GNU_LIBRARY__
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/* Many other libraries have conflicting prototypes for getopt, with
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differences in the consts, in stdlib.h. To avoid compilation
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errors, only prototype getopt for the GNU C library. */
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extern int getopt (int ___argc, char *const *___argv, const char *__shortopts)
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__THROW;
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__THROW __nonnull ((2, 3));
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#if defined __need_getopt && defined __USE_POSIX2 \
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&& !defined __USE_POSIX_IMPLICITLY && !defined __USE_GNU
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@ -161,23 +172,31 @@ extern int getopt (int ___argc, char *const *___argv, const char *__shortopts)
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__posix_getopt);
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# else
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extern int __posix_getopt (int ___argc, char *const *___argv,
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const char *__shortopts) __THROW;
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const char *__shortopts)
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__THROW __nonnull ((2, 3));
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# define getopt __posix_getopt
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# endif
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#endif
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#else /* not __GNU_LIBRARY__ */
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extern int getopt ();
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#endif /* __GNU_LIBRARY__ */
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#ifndef __need_getopt
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extern int getopt_long (int ___argc, char *const *___argv,
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/* The type of the 'argv' argument to getopt_long and getopt_long_only
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is properly 'char **', since both functions may write to the array
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(in order to move all the options to the beginning). However, for
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compatibility with old versions of LSB, glibc has to use 'char *const *'
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instead. */
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#ifndef __getopt_argv_const
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# define __getopt_argv_const const
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#endif
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extern int getopt_long (int ___argc, char *__getopt_argv_const *___argv,
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const char *__shortopts,
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const struct option *__longopts, int *__longind)
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__THROW;
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extern int getopt_long_only (int ___argc, char *const *___argv,
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__THROW __nonnull ((2, 3));
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extern int getopt_long_only (int ___argc, char *__getopt_argv_const *___argv,
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const char *__shortopts,
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const struct option *__longopts, int *__longind)
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__THROW;
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__THROW __nonnull ((2, 3));
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#endif
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@ -24,14 +24,15 @@
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#include "getopt_int.h"
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int
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getopt_long (int argc, char *const *argv, const char *options,
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getopt_long (int argc, char *__getopt_argv_const *argv, const char *options,
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const struct option *long_options, int *opt_index)
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{
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return _getopt_internal (argc, argv, options, long_options, opt_index, 0, 0);
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return _getopt_internal (argc, (char **) argv, options, long_options,
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opt_index, 0, 0);
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}
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int
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_getopt_long_r (int argc, char *const *argv, const char *options,
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_getopt_long_r (int argc, char **argv, const char *options,
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const struct option *long_options, int *opt_index,
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struct _getopt_data *d)
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{
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@ -45,14 +46,16 @@ _getopt_long_r (int argc, char *const *argv, const char *options,
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instead. */
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int
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getopt_long_only (int argc, char *const *argv, const char *options,
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getopt_long_only (int argc, char *__getopt_argv_const *argv,
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const char *options,
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const struct option *long_options, int *opt_index)
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{
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return _getopt_internal (argc, argv, options, long_options, opt_index, 1, 0);
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return _getopt_internal (argc, (char **) argv, options, long_options,
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opt_index, 1, 0);
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}
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int
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_getopt_long_only_r (int argc, char *const *argv, const char *options,
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_getopt_long_only_r (int argc, char **argv, const char *options,
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const struct option *long_options, int *opt_index,
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struct _getopt_data *d)
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{
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@ -76,7 +79,7 @@ main (int argc, char **argv)
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{
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int this_option_optind = optind ? optind : 1;
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int option_index = 0;
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static struct option long_options[] =
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static const struct option long_options[] =
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{
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{"add", 1, 0, 0},
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{"append", 0, 0, 0},
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@ -21,7 +21,7 @@
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#include <getopt.h>
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extern int _getopt_internal (int ___argc, char *const *___argv,
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extern int _getopt_internal (int ___argc, char **___argv,
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const char *__shortopts,
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const struct option *__longopts, int *__longind,
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int __long_only, int __posixly_correct);
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@ -101,18 +101,18 @@ struct _getopt_data
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default values and to clear the initialization flag. */
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#define _GETOPT_DATA_INITIALIZER { 1, 1 }
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extern int _getopt_internal_r (int ___argc, char *const *___argv,
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extern int _getopt_internal_r (int ___argc, char **___argv,
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const char *__shortopts,
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const struct option *__longopts, int *__longind,
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int __long_only, struct _getopt_data *__data,
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int __posixly_correct);
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extern int _getopt_long_r (int ___argc, char *const *___argv,
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extern int _getopt_long_r (int ___argc, char **___argv,
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const char *__shortopts,
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const struct option *__longopts, int *__longind,
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struct _getopt_data *__data);
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extern int _getopt_long_only_r (int ___argc, char *const *___argv,
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extern int _getopt_long_only_r (int ___argc, char **___argv,
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const char *__shortopts,
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const struct option *__longopts,
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int *__longind,
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