0,0 → 1,49 |
/* |
FUNCTION |
<<strnlen>>---character string length |
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INDEX |
strnlen |
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ANSI_SYNOPSIS |
#include <string.h> |
size_t strnlen(const char *<[str]>, size_t <[n]>); |
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TRAD_SYNOPSIS |
#include <string.h> |
size_t strnlen(<[str]>, <[n]>) |
char *<[src]>; |
size_t <[n]>; |
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DESCRIPTION |
The <<strnlen>> function works out the length of the string |
starting at <<*<[str]>>> by counting chararacters until it |
reaches a NUL character or the maximum: <[n]> number of |
characters have been inspected. |
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RETURNS |
<<strnlen>> returns the character count or <[n]>. |
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PORTABILITY |
<<strnlen>> is a GNU extension. |
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<<strnlen>> requires no supporting OS subroutines. |
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*/ |
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#undef __STRICT_ANSI__ |
#include <_ansi.h> |
#include <string.h> |
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size_t |
_DEFUN (strnlen, (str, n), |
_CONST char *str _AND |
size_t n) |
{ |
_CONST char *start = str; |
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while (n-- > 0 && *str) |
str++; |
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return str - start; |
} |