Add utils for working with endianness, more documentation, refactor CMake

Decided to update the docs, as well as adding few new features and small
refactoring.

test/src/TestArgs.c

@@ -385,6 +385,23 @@ BH_UNIT_TEST(InvalidLong)
 }
 
 
+BH_UNIT_TEST(Aesthetics)
+{
+    BH_ArgsOption options[] = {
+        {'a', "abc", 0, NULL},
+        {'b', "bcd", BH_ARGS_VALUE, "B option"},
+        {'i', "input", BH_ARGS_VALUE | BH_ARGS_OPTIONAL, "Input option"},
+        {1000, "long-option", 0, "Long options\nWith newline"},
+        {'p', NULL, 0, "P option"},
+        {0, NULL, 0, NULL},
+    };
+
+    BH_ArgsHelp(options, 0);
+    return 0;
+}
+
+
+
 int main(int argc, char **argv)
 {
     (void)argc;
@@ -398,6 +415,7 @@ int main(int argc, char **argv)
     BH_UNIT_ADD(Complex);
     BH_UNIT_ADD(InvalidShort);
     BH_UNIT_ADD(InvalidLong);
+    BH_UNIT_ADD(Aesthetics);
 
     return BH_UnitRun();
 }

test/src/TestEndian.c

@@ -0,0 +1,69 @@
+#include <BH/Util.h>
+#include <BH/Unit.h>
+
+
+BH_UNIT_TEST(Int16)
+{
+    char buffer[2];
+
+    BH_Write16LEs(buffer, -12345);
+    BH_VERIFY(BH_Read16LEs(buffer) == -12345);
+    BH_Write16BEs(buffer, BH_Read16BEs(buffer));
+    BH_VERIFY(BH_Read16LEs(buffer) == -12345);
+
+    BH_Write16LEu(buffer, 12345);
+    BH_VERIFY(BH_Read16LEu(buffer) == 12345);
+    BH_Write16BEu(buffer, BH_Read16BEu(buffer));
+    BH_VERIFY(BH_Read16LEu(buffer) == 12345);
+
+    return 0;
+}
+
+
+BH_UNIT_TEST(Int32)
+{
+    char buffer[4];
+
+    BH_Write32LEs(buffer, -12345);
+    BH_VERIFY(BH_Read32LEs(buffer) == -12345);
+    BH_Write32BEs(buffer, BH_Read32BEs(buffer));
+    BH_VERIFY(BH_Read32LEs(buffer) == -12345);
+
+    BH_Write32LEu(buffer, 12345);
+    BH_VERIFY(BH_Read32LEu(buffer) == 12345);
+    BH_Write32BEu(buffer, BH_Read32BEu(buffer));
+    BH_VERIFY(BH_Read32LEu(buffer) == 12345);
+
+    return 0;
+}
+
+
+BH_UNIT_TEST(Int64)
+{
+    char buffer[8];
+
+    BH_Write64LEs(buffer, -12345);
+    BH_VERIFY(BH_Read64LEs(buffer) == -12345);
+    BH_Write64BEs(buffer, BH_Read64BEs(buffer));
+    BH_VERIFY(BH_Read64LEs(buffer) == -12345);
+
+    BH_Write64LEu(buffer, 12345);
+    BH_VERIFY(BH_Read64LEu(buffer) == 12345);
+    BH_Write64BEu(buffer, BH_Read64BEu(buffer));
+    BH_VERIFY(BH_Read64LEu(buffer) == 12345);
+
+    return 0;
+}
+
+
+int main(int argc, char **argv)
+{
+    BH_UNUSED(argc);
+    BH_UNUSED(argv);
+
+    BH_UNIT_ADD(Int16);
+    BH_UNIT_ADD(Int32);
+    BH_UNIT_ADD(Int64);
+
+    return BH_UnitRun();
+}