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#include "fmt.h"
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unsigned int fmt_uint0(s,u,n) char *s; unsigned int u; unsigned int n;
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{
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unsigned int len;
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len = fmt_uint(FMT_LEN,u);
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while (len < n) { if (s) *s++ = '0'; ++len; }
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if (s) fmt_uint(s,u);
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return len;
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}