#ifndef STRTOUI_H
#define STRTOUI_H

#include "stdlib.h"
#include "ctype.h"
#include "limits.h"
#include "errno.h"

enum strtoui_error{
    STRTOUI_SUCCESS,
    STRTOUI_OVERFLOW,
    STRTOUI_UNDERFLOW,
    STRTOUI_INCONVERTIBLE
};

enum strtoui_error strtoui(unsigned int *out, char *s, int base) {
    char *end;
    if(s[0] == '\0' || isspace(s[0]))
        return STRTOUI_INCONVERTIBLE;
    long l =  strtol(s, &end, base);
    if(l > INT_MAX || (errno == ERANGE && l == LONG_MAX))
        return STRTOUI_OVERFLOW;
    if(l < 0|| (errno == ERANGE && l == LONG_MIN))
        return STRTOUI_UNDERFLOW;
    if(*end != '\0')
        return STRTOUI_INCONVERTIBLE;
    *out = l;
    return STRTOUI_SUCCESS;
}

#endif