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The type {{size_t}} generally covers the entire address space. \[[TR 24731-1|AA. C References#ISO/IEC TR 24731-1-2007]\] introduces a new type {{rsize_t}}, defined to be {{size_t}} but explicitly used to hold the size of a single object. In code that documents this purpose by using the type {{rsize_t}}, the size of an object can be checked to verify that it is no larger than {{RSIZE_MAX}}, the maximum size of a normal single object, which provides additional input validation for library functions. See \[[STR00-A. Use TR 24731 for remediation of existing string manipulation code]\] for additional discussion of TR 24731-1. |
Any variable that is used to represent the size of an object including integer values used as sizes, indices, loop counters, and lengths should be declared as rsize_t if available, otherwise size_t.
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