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The type {{size_t}} generally covers the entire address space. 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 \[[Meyers 2004|AA. Bibliography#Meyers 2004]\]. 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 recommendation [STR07-C. Use TR 24731C11 Annex K bounds-checking interfaces for remediation of existing string manipulation code] for additional discussion of TR 24731-1. |
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