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- /* from Henry Spencer's stringlib */
-
- #include <stddef.h>
- #include <string.h>
-
- /*
- * memcmp - compare bytes
- *
- * CHARBITS should be defined only if the compiler lacks "unsigned char".
- * It should be a mask, e.g. 0377 for an 8-bit machine.
- */
-
- #ifndef CHARBITS
- # define UNSCHAR(c) ((unsigned char)(c))
- #else
- # define UNSCHAR(c) ((c)&CHARBITS)
- #endif
-
- int /* <0, == 0, >0 */
- memcmp(s1, s2, size)
- const void * s1;
- const void * s2;
- size_t size;
- {
- register const char *scan1;
- register const char *scan2;
- register size_t n;
-
- scan1 = (const char *) s1;
- scan2 = (const char *) s2;
- for (n = size; n > 0; n--)
- if (*scan1 == *scan2) {
- scan1++;
- scan2++;
- } else
- return(UNSCHAR (*scan1) - UNSCHAR (*scan2));
-
- return(0);
- }
-