34 lines
816 B
C
34 lines
816 B
C
/*-------------------------------------------------------------------------
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*
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* strnlen.c
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* Fallback implementation of strnlen().
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*
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*
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* Portions Copyright (c) 1996-2024, PostgreSQL Global Development Group
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* Portions Copyright (c) 1994, Regents of the University of California
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*
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* IDENTIFICATION
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* src/port/strnlen.c
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*
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*-------------------------------------------------------------------------
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*/
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#include "c.h"
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/*
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* Implementation of posix' strnlen for systems where it's not available.
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*
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* Returns the number of characters before a null-byte in the string pointed
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* to by str, unless there's no null-byte before maxlen. In the latter case
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* maxlen is returned.
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*/
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size_t
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strnlen(const char *str, size_t maxlen)
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{
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const char *p = str;
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while (maxlen-- > 0 && *p)
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p++;
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return p - str;
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}
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