_mbstrnlen.c File Reference

#include <precomp.h>
#include <mbctype.h>
#include <specstrings.h>

Include dependency graph for _mbstrnlen.c:

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Functions
	_Success_ (return, 0)

Function Documentation

_Success_()

_Success_	(	return	,
		0
	)

Definition at line 13 of file _mbstrnlen.c.

{
    size_t cchCount = 0;
    unsigned char jMbsByte;

    /* Check parameters */
    if (!MSVCRT_CHECK_PMT((pmbstr != 0)) && (cjMaxLen <= INT_MAX))
    {
        _set_errno(EINVAL);
        return -1;
    }

    /* Loop while we have bytes to process */
    while (cjMaxLen-- > 0)
    {
        /* Get next mb byte */
        jMbsByte = *pmbstr++;

        /* If this is 0, we're done */
        if (jMbsByte == 0) break;

        /* if this is a lead byte, continue with next char */
        if (_ismbblead(jMbsByte))
        {
            // FIXME: check if this is a valid char.
            continue;
        }

        /* Count this character */
        cchCount++;
    }

    return cchCount;
}