Thanks everyone for the help! On 16 November 2016 at 17:52, Jonathan Wakely <jwakely.gcc@xxxxxxxxx> wrote: > On 16 November 2016 at 12:01, Andrew Haley wrote: >> On 16/11/16 11:45, Prathamesh Kulkarni wrote: >>> I am not sure though how to interpret this in context of above example. >> >> This is for GCC help, not general help with C. >> >> However, >> >> ISO/IEC 9899:2011 >> >> 7.24.1 String function conventions >> >> Where an argument declared as size_t n specifies the length of the >> array for a function, n can have the value zero on a call to that >> function. Unless explicitly stated otherwise in the description of a >> particular function in this subclause, pointer arguments on such a >> call shall still have valid values, as described in 7.1.4. >> > > See also "Null pointer checks may be optimized away more aggressively" > at https://gcc.gnu.org/gcc-4.9/porting_to.html
