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Old August 29th, 2016, 02:55 AM
beingchinmay beingchinmay is offline
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Arrow General - Comparisons of a string pointer with zero

Several string functions return an invalid string pointer to indicate failure. It is practical that this pointer equals to NULL, so that code snippets like:

Quote:
if (!Strchr(String,\n)) { }


work as intended. We overload the operator != and the operator == to mimic this behavior:

Quote:
int operator != (const Stringp & string1, int i) { if (isNullStringp(string1) && i == 0) return 0; return 1; }


We allow only comparisons with zero. The operator == is very similar:

Quote:
int operator == (const Stringp & string1, int i) { if (i == 0 && isNullStringpA(string1)) return 1; return 0; }

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