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Man Pages


Manual Reference Pages  -  SPUTU8 (3)

NAME

sputu8 - utf-8 library function manual page

CONTENTS

Synopsis
Description
Return Values
See Also
Standards
Diagnostics
Authors
Bugs

SYNOPSIS


.Fd #include <utf-8.h> char * sputu8 unsigned int c char *buffer char * utf8sputc unsigned int c char *buffer

DESCRIPTION

The sputu8 function of utf-8 library converts a UTC-4 (31-bit Unicode) integer to a sequence of one or more characters representing its UTF-8 value, and writes the result to a buffer (character string). It appends a NUL at the end of the buffer, so it can be processed as a standard C string.

utf8sputc is a macro which simply gives sputu8 a name that may be more convenient to remember. It is defined in <utf-8.h>.

The sputu8 function and the utf8sputc macro take two arguments: c, the UTC-4 code, and buffer, a pointer to a string of characters. The buffer must have at least seven bytes available for writing: UTF-8 encodes Unicode into 1 - 6 characters, plus we need room for the terminating NUL.

RETURN VALUES

sputu8 returns the pointer to the terminating NUL. This allows you to append the next sequence of characters without having to determine where the string ends after each call to sputu8.

If buffer is NULL, sputu8 returns NULL. If c is not a valid UTC-4 code (i.e., its high bit is set), no conversion takes place, and sputu8 just returns buffer.

SEE ALSO

libutf-8(3), fgetu8(3), fputu8, sgetu8(3)
.Rs UTF-8, a transformation format of Unicode and ISO 10646
.Re
.Rs Using Unicode with MIME
.Re

STANDARDS

ISO 10646-1: 1993 (‘‘Unicode’’), RFC 2044: 1996 (‘‘UTF-8’’), -ansiC.

DIAGNOSTICS

You should always compare the RETURN VALUES to buffer. If they are NULL, no conversion took place. Otherwise, if they are identical, c was not a valid UTC-8 integer. Anything else indicates successful conversion.

AUTHORS

This manual page was written by
.An G. Adam Stanislav Aq adam@whizkidtech.net .

BUGS

None known.
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