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#define is_white(c) (((c) == ' ') || ((c) == '\t') || ((c) == '\n') || ((c) == '\r'))
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#define is_white(c) (((c) == ' ') || ((c) == '\t') || ((c) == '\n') || ((c) == '\r'))
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#define min(a,b)    ((a)<(b)?(a):(b))
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#define min(a,b)    ((a)<(b)?(a):(b))
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#define max(a,b)    ((a)>(b)?(a):(b))
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#define max(a,b)    ((a)>(b)?(a):(b))
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/* Return true if the interlvals overlap */
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/** Return true if the interlvals overlap. */
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static inline int overlaps(__address s1,size_t sz1, __address s2, size_t sz2)
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static inline int overlaps(__address s1, size_t sz1, __address s2, size_t sz2)
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{
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{
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    __address e1 = s1+sz1;
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    __address e1 = s1+sz1;
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    __address e2 = s2+sz2;
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    __address e2 = s2+sz2;
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    return s1 < e2 && s2 < e1;
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    return s1 < e2 && s2 < e1;