memcmp.c File Reference

#include <string.h>

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Functions
int	__attribute__ ((weak))

Function Documentation

__attribute__()

int __attribute__

(

(weak)

)

p1 and p2 are the same memory? easy peasy! bail out

Definition at line 3 of file memcmp.c.

{
    size_t i;

    if(p1 == p2)
    {
        return 0;
    }

    if(!p1)
    {
        return 1;
    }

    if(!p2)
    {
        return -1;
    }

    // This for loop does the comparing and pointer moving...
    for(i = 0; (i < n) && (*(const uint8_t*)p1 == *(const uint8_t*)p2);
        i++, p1 = 1 + (const uint8_t*)p1, p2 = 1 + (const uint8_t*)p2)
    {
        // empty body
    }

    // if i == length, then we have passed the test
    return (i == n) ? 0 : (*(const uint8_t*)p1 - *(const uint8_t*)p2);
}