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35 .\" @(#)rune.3 8.2 (Berkeley) 12/11/93
46 .Nd rune support for C
49 .Fd #include <errno.h>
51 .Fn setrunelocale "char *locale"
53 .Fn setinvalidrune "rune_t rune"
55 .Fn sgetrune "const char *string" "size_t n" "char const **result"
57 .Fn sputrune "rune_t rune" "char *string" "size_t n" "char **result"
59 .Fd #include <stdio.h>
61 .Fn fgetrune "FILE *stream"
63 .Fn fungetrune "rune_t rune" "FILE *stream"
65 .Fn fputrune "rune_t rune" "FILE *stream"
69 controls the type of encoding used to represent runes as multibyte strings
70 as well as the properties of the runes as defined in
74 argument indicates which locale to load.
75 If the locale is successfully loaded,
77 is returned, otherwise an errno value is returned to indicate the
82 function sets the value of the global value
89 function tries to read a single multibyte character from
96 is successful, the rune is returned.
102 will point to the first byte which was not converted in
108 do not describe a full multibyte character,
114 If there is an encoding error at the start of
119 will point to the second character of
124 function tries to encode
126 as a multibyte string and store it at
130 bytes will be stored.
136 will be set to point to the first byte in string following the new
148 is the number of bytes that would be needed to store the multibyte value.
149 If the multibyte character would consist of more than
160 will return the number of bytes which would be needed to store
162 as a multibyte character.
166 function operates the same as
168 with the exception that it attempts to read enough bytes from
170 to decode a single rune. It returns either
174 on an encoding error, or the rune decoded if all went well.
178 function pushes the multibyte encoding, as provided by
196 function writes the multibyte encoding of
210 function returns one of the following values:
211 .Bl -tag -width WWWWWWWW
213 .Fa setrunelocale was successful.
219 The locale could not be found.
221 The file found was not a valid file.
223 The encoding indicated by the locale was unknown.
228 function either returns the rune read or
232 function returns the number of bytes needed to store
234 as a multibyte string.
236 .Bl -tag -width /usr/share/locale/locale/LC_CTYPE -compact
237 .It Pa $PATH_LOCALE/ Ns Em locale Ns /LC_CTYPE
238 .It Pa /usr/share/locale/ Ns Em locale Ns /LC_CTYPE
239 binary LC_CTYPE file for the locale
253 was chosen to accent the purposeful choice of not basing the
254 system with the ANSI C
255 primitives, which were, shall we say, less aesthetic.
257 These functions first appeared in
262 function and the other non-ANSI rune functions were inspired by
263 .Nm Plan 9 from Bell Labs
264 as a much more sane alternative to the ANSI multibyte and
265 wide character support.
266 .\"They were conceived at the San Diego 1993 Summer USENIX conference by
267 .\"Paul Borman of Krystal Technologies, Keith Bostic of CSRG and Andrew Hume
270 All of the ANSI multibyte and wide character
271 support functions are built using the rune functions.