Test on big endian CPU architectures

src/arch.h

@@ -34,6 +34,21 @@
 #define MG_ARCH MG_ARCH_RP2040
 #endif
 
+/*
+ * clang with std=-c99 uses __LITTLE_ENDIAN, by default
+ * while for ex, RTOS gcc - LITTLE_ENDIAN, by default
+ * it depends on __USE_BSD, but let's have everything
+ */
+#if !defined(BYTE_ORDER) && defined(__BYTE_ORDER)
+#define BYTE_ORDER __BYTE_ORDER
+#ifndef LITTLE_ENDIAN
+#define LITTLE_ENDIAN __LITTLE_ENDIAN
+#endif /* LITTLE_ENDIAN */
+#ifndef BIG_ENDIAN
+#define BIG_ENDIAN __LITTLE_ENDIAN
+#endif /* BIG_ENDIAN */
+#endif /* BYTE_ORDER */
+
 #if !defined(MG_ARCH)
 #include "mongoose_custom.h"  // keep this include
 #endif

src/md5.c

@@ -2,15 +2,6 @@
 #include "arch.h"
 
 #if defined(MG_ENABLE_MD5) && MG_ENABLE_MD5
-#if !defined(BYTE_ORDER) && defined(__BYTE_ORDER)
-#define BYTE_ORDER __BYTE_ORDER
-#ifndef LITTLE_ENDIAN
-#define LITTLE_ENDIAN __LITTLE_ENDIAN
-#endif /* LITTLE_ENDIAN */
-#ifndef BIG_ENDIAN
-#define BIG_ENDIAN __LITTLE_ENDIAN
-#endif /* BIG_ENDIAN */
-#endif /* BYTE_ORDER */
 
 static void mg_byte_reverse(unsigned char *buf, unsigned longs) {
 /* Forrest: MD5 expect LITTLE_ENDIAN, swap if BIG_ENDIAN */

src/sha1.c

@@ -3,21 +3,6 @@
 #include "sha1.h"
 #include "arch.h"
 
-/*
- * clang with std=-c99 uses __LITTLE_ENDIAN, by default
- * while for ex, RTOS gcc - LITTLE_ENDIAN, by default
- * it depends on __USE_BSD, but let's have everything
- */
-#if !defined(BYTE_ORDER) && defined(__BYTE_ORDER)
-#define BYTE_ORDER __BYTE_ORDER
-#ifndef LITTLE_ENDIAN
-#define LITTLE_ENDIAN __LITTLE_ENDIAN
-#endif /* LITTLE_ENDIAN */
-#ifndef BIG_ENDIAN
-#define BIG_ENDIAN __LITTLE_ENDIAN
-#endif /* BIG_ENDIAN */
-#endif /* BYTE_ORDER */
-
 union char64long16 {
   unsigned char c[64];
   uint32_t l[16];