Use inttypes for `snprintf()`

include/mruby/value.h

@@ -41,12 +41,15 @@ struct mrb_state;
 #if defined _MSC_VER && _MSC_VER < 1800
 # define PRIo64 "llo"
 # define PRId64 "lld"
+# define PRIu64 "llu"
 # define PRIx64 "llx"
 # define PRIo16 "ho"
 # define PRId16 "hd"
+# define PRIu16 "hu"
 # define PRIx16 "hx"
 # define PRIo32 "o"
 # define PRId32 "d"
+# define PRIu32 "u"
 # define PRIx32 "x"
 #else
 # include <inttypes.h>

mrbgems/mruby-pack/src/pack.c

@@ -237,7 +237,7 @@ unpack_l(mrb_state *mrb, const unsigned char *src, int srclen, mrb_value ary, un
     int32_t sl = ul;
 #ifndef MRB_INT64
     if (!FIXABLE(sl)) {
-      snprintf(msg, sizeof(msg), "cannot unpack to Fixnum: %ld", (long)sl);
+      snprintf(msg, sizeof(msg), "cannot unpack to Fixnum: %" PRId32, sl);
       mrb_raise(mrb, E_RANGE_ERROR, msg);
     }
 #endif
@@ -245,7 +245,7 @@ unpack_l(mrb_state *mrb, const unsigned char *src, int srclen, mrb_value ary, un
   } else {
 #ifndef MRB_INT64
     if (!POSFIXABLE(ul)) {
-      snprintf(msg, sizeof(msg), "cannot unpack to Fixnum: %lu", (unsigned long)ul);
+      snprintf(msg, sizeof(msg), "cannot unpack to Fixnum: %" PRIu32, ul);
       mrb_raise(mrb, E_RANGE_ERROR, msg);
     }
 #endif
@@ -307,13 +307,13 @@ unpack_q(mrb_state *mrb, const unsigned char *src, int srclen, mrb_value ary, un
   if (flags & PACK_FLAG_SIGNED) {
     int64_t sll = ull;
     if (!FIXABLE(sll)) {
-      snprintf(msg, sizeof(msg), "cannot unpack to Fixnum: %lld", (long long)sll);
+      snprintf(msg, sizeof(msg), "cannot unpack to Fixnum: %" PRId64, sll);
       mrb_raise(mrb, E_RANGE_ERROR, msg);
     }
     n = sll;
   } else {
     if (!POSFIXABLE(ull)) {
-      snprintf(msg, sizeof(msg), "cannot unpack to Fixnum: %llu", (unsigned long long)ull);
+      snprintf(msg, sizeof(msg), "cannot unpack to Fixnum: %" PRIu64, ull);
       mrb_raise(mrb, E_RANGE_ERROR, msg);
     }
     n = ull;