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35 .\" @(#)rune.3 8.2 (Berkeley) 12/11/93
45 .Nd rune support for C
48 .Fd #include <errno.h>
50 .Fn setrunelocale "char *locale"
52 .Fn setinvalidrune "rune_t rune"
54 .Fn sgetrune "const char *string" "size_t n" "char const **result"
56 .Fn sputrune "rune_t rune" "char *string" "size_t n" "char **result"
58 .Fd #include <stdio.h>
60 .Fn fgetrune "FILE *stream"
62 .Fn fungetrune "rune_t rune" "FILE *stream"
64 .Fn fputrune "rune_t rune" "FILE *stream"
68 controls the type of encoding used to represent runes as multibyte strings
69 as well as the properties of the runes as defined in
73 argument indicates which locale to load.
74 If the locale is successfully loaded,
76 is returned, otherwise an errno value is returned to indicate the
81 function sets the value of the global value
88 function tries to read a single multibyte character from
95 is successful, the rune is returned.
101 will point to the first byte which was not converted in
107 do not describe a full multibyte character,
113 If there is an encoding error at the start of
118 will point to the second character of
123 function tries to encode
125 as a multibyte string and store it at
129 bytes will be stored.
135 will be set to point to the first byte in string following the new
147 is the number of bytes that would be needed to store the multibyte value.
148 If the multibyte character would consist of more than
159 will return the number of bytes which would be needed to store
161 as a multibyte character.
165 function operates the same as
167 with the exception that it attempts to read enough bytes from
169 to decode a single rune. It returns either
173 on an encoding error, or the rune decoded if all went well.
177 function pushes the multibyte encoding, as provided by
195 function writes the multibyte encoding of
209 function returns one of the following values:
210 .Bl -tag -width WWWWWWWW
212 .Fa setrunelocale was successful.
218 The locale could not be found.
220 The file found was not a valid file.
222 The encoding indicated by the locale was unknown.
227 function either returns the rune read or
231 function returns the number of bytes needed to store
233 as a multibyte string.
235 .Bl -tag -width /usr/share/locale/locale/LC_CTYPE -compact
236 .It Pa $PATH_LOCALE/ Ns Em locale Ns /LC_CTYPE
237 .It Pa /usr/share/locale/ Ns Em locale Ns /LC_CTYPE
238 binary LC_CTYPE file for the locale
252 was chosen to accent the purposeful choice of not basing the
253 system with the ANSI C
254 primitives, which were, shall we say, less aesthetic.
256 These functions first appeared in
261 function and the other non-ANSI rune functions were inspired by
262 .Nm Plan 9 from Bell Labs
263 as a much more sane alternative to the ANSI multibyte and
264 wide character support.
265 .\"They were conceived at the San Diego 1993 Summer USENIX conference by
266 .\"Paul Borman of Krystal Technologies, Keith Bostic of CSRG and Andrew Hume
269 All of the ANSI multibyte and wide character
270 support functions are built using the rune functions.