lib: add: memcmp

libbozo/headers/string.h

@@ -8,3 +8,4 @@ int strncmp(const char *s1, const char *s2, size_t n);
 size_t strlen(const char *str);
 char *strstr(const char *haystack, const char *needle);
 void *memcpy(void *dest, const void *src, size_t n);
+int memcmp(const void *s1, const void *s2, size_t n);

libbozo/src/string/memcmp.c

@@ -0,0 +1,13 @@
+#include <stddef.h>
+
+int memcmp(const void *s1, const void *s2, size_t n)
+{
+    const char *str1 = s1;
+    const char *str2 = s2;
+    size_t i;
+    
+    if (n == 0)
+        return 0;
+    for (i = 0; str1[i] == str2[i] && i < n - 1; i++);
+    return str1[i] - str2[i];
+}