Remove undefined behaviors

libc/str/memccpy.c

@@ -62,7 +62,7 @@ void *memccpy(void *dst, const void *src, int c, size_t n) {
   d = dst;
   s = src;
   c &= 255;
-  v = 0x0101010101010101 * c;
+  v = 0x0101010101010101ul * c;
   for (; (uintptr_t)(s + i) & 7; ++i) {
     if (i == n) return NULL;
     if ((d[i] = s[i]) == c) return d + i + 1;

libc/str/memchr.c

@@ -31,7 +31,7 @@ void *memchr(const void *m, int c, size_t n) {
   uint64_t v, w;
   const char *p, *pe;
   c &= 255;
-  v = 0x0101010101010101 * c;
+  v = 0x0101010101010101ul * c;
   for (p = m, pe = p + n; p + 8 <= pe; p += 8) {
     w = (uint64_t)(255 & p[7]) << 070 | (uint64_t)(255 & p[6]) << 060 |
         (uint64_t)(255 & p[5]) << 050 | (uint64_t)(255 & p[4]) << 040 |

libc/str/memset-pure.c

@@ -31,7 +31,7 @@ void *memset_pure(void *p, int c, size_t n) {
   char *b;
   uint64_t x;
   b = p;
-  x = 0x0101010101010101 * (c & 0xff);
+  x = 0x0101010101010101ul * (c & 0xff);
   switch (n) {
     case 0:
       return p;

libc/str/rawmemchr.c

@@ -37,7 +37,7 @@ void *rawmemchr(const void *m, int c) {
   const unsigned char *s;
   s = m;
   c &= 255;
-  v = 0x0101010101010101 * c;
+  v = 0x0101010101010101ul * c;
   for (; (uintptr_t)s & 7; ++s) {
     if (*s == c) return s;
   }