1 files changed, 43 insertions, 0 deletions
diff --git a/src/sysdeps/tryendianness.c b/src/sysdeps/tryendianness.c
new file mode 100644
index 0000000..3fa1938
--- /dev/null
+++ b/src/sysdeps/tryendianness.c
@@ -0,0 +1,43 @@
+/* ISC license. */
+
+#include <stdio.h>
+
+int main (void)
+{
+  unsigned long i = 0xdeadbeefUL ;
+  if (sizeof(unsigned long) == 4)
+    if ((((unsigned char *)(&i))[0] == 0xef)
+     && (((unsigned char *)(&i))[1] == 0xbe)
+     && (((unsigned char *)(&i))[2] == 0xad)
+     && (((unsigned char *)(&i))[3] == 0xde))
+      return (puts("little"), 0) ;
+    else if ((((unsigned char *)(&i))[0] == 0xde)
+     && (((unsigned char *)(&i))[1] == 0xad)
+     && (((unsigned char *)(&i))[2] == 0xbe)
+     && (((unsigned char *)(&i))[3] == 0xef))
+      return (puts("big"), 0) ;
+    else return (puts("unknown"), 1) ;
+  else if (sizeof(unsigned long) == 8)
+    if ((((unsigned char *)(&i))[0] == 0xef)
+     && (((unsigned char *)(&i))[1] == 0xbe)
+     && (((unsigned char *)(&i))[2] == 0xad)
+     && (((unsigned char *)(&i))[3] == 0xde)
+     && (((unsigned char *)(&i))[4] == 0x00)
+     && (((unsigned char *)(&i))[5] == 0x00)
+     && (((unsigned char *)(&i))[6] == 0x00)
+     && (((unsigned char *)(&i))[7] == 0x00))
+      return (puts("little"), 0) ;
+    else if (sizeof(unsigned long) == 8)
+      if ((((unsigned char *)(&i))[0] == 0x00)
+       && (((unsigned char *)(&i))[1] == 0x00)
+       && (((unsigned char *)(&i))[2] == 0x00)
+       && (((unsigned char *)(&i))[3] == 0x00)
+       && (((unsigned char *)(&i))[4] == 0xde)
+       && (((unsigned char *)(&i))[5] == 0xad)
+       && (((unsigned char *)(&i))[6] == 0xbe)
+       && (((unsigned char *)(&i))[7] == 0xef))
+        return (puts("big"), 0) ;
+      else return (puts("unknown"), 1) ;
+    else return 1 ;
+  else return (puts("unknown unsigned long size"), 1) ;
+}