22 lines
480 B
C
22 lines
480 B
C
#include "stdlib_p.h"
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#include <errno.h>
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unsigned long int strtoul(char const * restrict ptr, char ** restrict endptr,
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int base)
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{
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unsigned long n = 0;
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if(endptr)
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*endptr = (char *)ptr;
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struct __scanf_input in = { .str = ptr, .fp = NULL };
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__scanf_start(&in);
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int err = __strto_int(&in, base, (long *)&n, NULL, true, INT_MAX);
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__scanf_end(&in);
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if(err != 0)
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errno = (err == EOF) ? EINVAL : err;
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if(err != EINVAL && endptr)
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*endptr = (char *)in.str;
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return n;
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}
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