Overriding the Memmove function

In the case of memory duplication, if there are overlapping in two paragraphs, then it is easy to generate coverage. So rewrite this function to handle copies of overlapping memory.

void* memmove (void* str1,const void* str2,int N) {    char* pStr1 = (char*) str1;    Const char* PSTR2 = (const char*) str2;    if (PStr1 < PSTR2)//starting from the front copy{for        (int i=0; i!=n; ++i) {            * (pstr1++) = * (pstr2++);        }    }    else//starting from the back copy{        pStr1 + = n-1;        PSTR2 + = n-1;        for (int i=0; i!=n; ++i) {            * (pstr1--) = * (pstr2--);        }    }    return PSTR1;}

To avoid overwriting a memory area that has not yet been copied, the solution here is to copy the memory from the front or back, based on the location of the two pieces of memory.

Overriding the Memmove function