Hello,

gcc 4.4.4 c89

My program does a lot of string coping. I don't want to use the strncpy as it doesn't nul terminate. And I can't use strlcpy as its not portable.

Just a few questions. How can I put my function those its paces to ensure that it is completely safe and stable. Unit testing?

Is this good enough for production?

size_t s_strlcpy(char *dest, const char *src, const size_t len)
{
    size_t i = 0;

    /* Always copy 1 less then the destination to make room for the nul */
    for(i = 0; i < len - 1; i++)
    {
        /* only copy up to the first nul is reached */
        if(*src != '\0') {
            *dest++ = *src++;
        }
        else {
            break;
        }
    }

    /* nul terminate the string */
    *dest = '\0';

    /* Return the number of bytes copied */
    return i;
}

Many thanks for any suggestions,