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#include "str.h"
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unsigned int str_len(const char *in) {
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register const char* t=in;
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for (;;) {
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if (!*t) break; ++t;
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if (!*t) break; ++t;
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if (!*t) break; ++t;
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if (!*t) break; ++t;
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}
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return t-in;
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}
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