1mblen(3C)                Standard C Library Functions                mblen(3C)
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NAME

6       mblen - get number of bytes in a character
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SYNOPSIS

9       #include <stdlib.h>
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11       int mblen(const char *s, size_t n);
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DESCRIPTION

15       If s is not a null pointer, mblen() determines the number of bytes con‐
16       stituting the character pointed to by s. It is equivalent to:
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19       mbtowc((wchar_t *)0, s, n);
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22       A call with s as a null pointer causes this function to return  0.  The
23       behavior  of  this function is affected by the LC_CTYPE category of the
24       current locale.
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RETURN VALUES

27       If s is a null pointer, mblen() returns 0. It s is not a null  pointer,
28       mblen()  returns  0 (if s points to the null byte), the number of bytes
29       that constitute the character (if the next n  or  fewer  bytes  form  a
30       valid  character),  or   −1 (if they do not form a valid character) and
31       may set errno to indicate the error. In no case will the value returned
32       be greater than n or the value of the MB_CUR_MAX macro.
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ERRORS

35       The mblen() function may fail if:
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37       EILSEQ    Invalid character sequence is detected.
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USAGE

41       The  mblen() function can be used safely in multithreaded applications,
42       as long as setlocale(3C) is not being called to change the locale.
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ATTRIBUTES

45       See attributes(5) for descriptions of the following attributes:
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50       ┌─────────────────────────────┬─────────────────────────────┐
51ATTRIBUTE TYPE               ATTRIBUTE VALUE              
52       ├─────────────────────────────┼─────────────────────────────┤
53       │CSI                          │Enabled                      │
54       ├─────────────────────────────┼─────────────────────────────┤
55       │Interface Stability          │Standard                     │
56       ├─────────────────────────────┼─────────────────────────────┤
57       │MT-Level                     │MT-Safe with exceptions      │
58       └─────────────────────────────┴─────────────────────────────┘
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SEE ALSO

61       mbstowcs(3C),  mbtowc(3C),  setlocale(3C),  wcstombs(3C),   wctomb(3C),
62       attributes(5), standards(5)
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66SunOS 5.11                        24 Jul 2002                        mblen(3C)
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