File: skipatou.c

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static inline int isdigit(int ch)
{
    return (ch >= '0') && (ch <= '9');
}

unsigned int skip_atou(const char **s)
{
    int i = 0;

    while (isdigit(**s))
	i = i * 10 + *((*s)++) - '0';
    return i;
}