From: Yann Collet <cyan@fb.com>
Date: Mon, 24 Sep 2018 06:57:30 +0000 (-0700)
Subject: added some tests based on limits.h
X-Git-Tag: v0.0.29~3^2
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=refs%2Fpull%2F1335%2Fhead;p=thirdparty%2Fzstd.git

added some tests based on limits.h

in order to ensure proper type mapping
when not using stdint.h
---

diff --git a/lib/common/mem.h b/lib/common/mem.h
index 47d230017..2051bcad1 100644
--- a/lib/common/mem.h
+++ b/lib/common/mem.h
@@ -57,11 +57,23 @@ MEM_STATIC void MEM_check(void) { MEM_STATIC_ASSERT((sizeof(size_t)==4) || (size
   typedef  uint64_t U64;
   typedef   int64_t S64;
 #else
+# include <limits.h>
+#if CHAR_BIT != 8
+#  error "this implementation requires char to be exactly 8-bit type"
+#endif
   typedef unsigned char      BYTE;
+#if USHRT_MAX != 65535
+#  error "this implementation requires short to be exactly 16-bit type"
+#endif
   typedef unsigned short      U16;
   typedef   signed short      S16;
+#if UINT_MAX != 4294967295
+#  error "this implementation requires int to be exactly 32-bit type"
+#endif
   typedef unsigned int        U32;
   typedef   signed int        S32;
+/* note : there are no limits defined for long long type in C90.
+ * limits exist in C99, however, in such case, <stdint.h> is preferred */
   typedef unsigned long long  U64;
   typedef   signed long long  S64;
 #endif