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#include "str.h"

unsigned int str_len(char *s)
{
  register char *t;

  t = s;
  for (;;) {
    if (!*t) return t - s; ++t;
    if (!*t) return t - s; ++t;
    if (!*t) return t - s; ++t;
    if (!*t) return t - s; ++t;
  }
}