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#include <string.h>
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#include <libgen.h>
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char *dirname(char *s)
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{
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size_t i;
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if (!s || !*s) return ".";
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i = strlen(s)-1;
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for (; s[i]=='/'; i--) if (!i) return "/";
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for (; s[i]!='/'; i--) if (!i) return ".";
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for (; s[i]=='/'; i--) if (!i) return "/";
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s[i+1] = 0;
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return s;
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}
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