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annotate doc/posix-functions/isdigit.texi @ 13549:bb0ceefd22dc

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avoid some overlong lines from posix urls, etc.
author Karl Berry <karl@freefriends.org>
date Fri, 13 Aug 2010 11:50:58 -0700
parents f3ad15bb66b0
children fc6f79af802f
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1 @node isdigit
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2 @section @code{isdigit}
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3 @findex isdigit
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4
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bb0ceefd22dc avoid some overlong lines from posix urls, etc.
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5 POSIX specification:@* @url{http://www.opengroup.org/onlinepubs/9699919799/functions/isdigit.html}
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6
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7 Gnulib module: ---
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8
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9 Portability problems fixed by Gnulib:
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10 @itemize
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11 @end itemize
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12
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13 Portability problems not fixed by Gnulib:
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14 @itemize
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15 @end itemize
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16
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17 Note: This function's behaviour depends on the locale, but does not support
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18 the multibyte characters that occur in strings in locales with
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19 @code{MB_CUR_MAX > 1} (this includes all the common UTF-8 locales).
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20 There are four alternative APIs:
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21
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22 @table @code
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23 @item c_isdigit
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24 This function operates in a locale independent way and returns true only for
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25 ASCII characters. It is provided by the Gnulib module @samp{c-ctype}.
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26
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27 @item iswdigit
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28 This function operates in a locale dependent way, on wide characters. In
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29 order to use it, you first have to convert from multibyte to wide characters,
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30 using the @code{mbrtowc} function. It is provided by the Gnulib module
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31 @samp{wctype}.
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32
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33 @item mb_isdigit
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34 This function operates in a locale dependent way, on multibyte characters.
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35 It is provided by the Gnulib module @samp{mbchar}.
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36
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37 @item uc_is_digit
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38 This function operates in a locale independent way, on Unicode characters.
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39 It is provided by the Gnulib module @samp{unictype/ctype-digit}.
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40 @end table