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This is needed to complete the recent OS X fixes. Also, fix related documentation as suggested by Eric Blake. * doc/posix-functions/isalnum.texi, doc/posix-functions/isalpha.texi: * doc/posix-functions/isascii.texi, doc/posix-functions/iscntrl.texi: * doc/posix-functions/isdigit.texi, doc/posix-functions/isgraph.texi: * doc/posix-functions/islower.texi, doc/posix-functions/isprint.texi: * doc/posix-functions/ispunct.texi, doc/posix-functions/isspace.texi: * doc/posix-functions/isupper.texi, doc/posix-functions/isxdigit.texi: * doc/posix-functions/toascii.texi, doc/posix-functions/tolower.texi: * doc/posix-functions/toupper.texi: List the 'ctype' gnulib module. * doc/posix-functions/strcat.texi, doc/posix-functions/strcpy.texi: * doc/posix-functions/strncpy.texi: List the 'string' gnulib module. * modules/memcpy, modules/memmove, modules/memset (Depends-on): Add string. * modules/ctype, modules/string (Depends-on): Add extern-inline.
45 lines
1.4 KiB
Plaintext
45 lines
1.4 KiB
Plaintext
@node isalnum
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@section @code{isalnum}
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@findex isalnum
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POSIX specification:@* @url{http://www.opengroup.org/onlinepubs/9699919799/functions/isalnum.html}
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Gnulib module: ctype
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Portability problems fixed by Gnulib:
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@itemize
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@item
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This function cannot be called from plain inline or extern inline functions
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on some platforms:
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OS X 10.8.
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@end itemize
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Portability problems not fixed by Gnulib:
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@itemize
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@end itemize
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Note: This function's behaviour depends on the locale, but does not support
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the multibyte characters that occur in strings in locales with
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@code{MB_CUR_MAX > 1} (this includes all the common UTF-8 locales).
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There are four alternative APIs:
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@table @code
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@item c_isalnum
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This function operates in a locale independent way and returns true only for
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ASCII characters. It is provided by the Gnulib module @samp{c-ctype}.
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@item iswalnum
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This function operates in a locale dependent way, on wide characters. In
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order to use it, you first have to convert from multibyte to wide characters,
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using the @code{mbrtowc} function. It is provided by the Gnulib module
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@samp{wctype}.
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@item mb_isalnum
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This function operates in a locale dependent way, on multibyte characters.
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It is provided by the Gnulib module @samp{mbchar}.
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@item uc_is_alnum
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This function operates in a locale independent way, on Unicode characters.
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It is provided by the Gnulib module @samp{unictype/ctype-alnum}.
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@end table
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