Make Scalar::GetValue more consistent

[labath]

Summary

It seems the original intention of the function was printing signed values in decimal format, and
unsigned values in hex (without the leading "0x"). However, signed and unsigned long were
exchanged, which lead to amusing test failures in TestMemoryFind.py.

Instead of just switching the two, I think we should just print everything in decimal here, as
the current behaviour is very confusing (especially when one does not request printing of types).
Nothing seems to depend on this behaviour except and we already have a way for the user to
request the format he wants when printing values for most commands (which presumably does not go
through this function).

I also add a unit tests for the function in question.

packages/Python/lldbsuite/test/functionalities/memory/find/TestMemoryFind.py

class MemoryFindTestCase(TestBase):
     mydir = TestBase.compute_mydir(__file__)
 
     def setUp(self):
         # Call super's setUp().
         TestBase.setUp(self)
         # Find the line number to break inside main().
         self.line = line_number('main.cpp', '// break here')
 
-    @expectedFailureAll(archs=["i386", "arm"])
     def test_memory_find(self):
         """Test the 'memory find' command."""
         self.build()
         exe = os.path.join(os.getcwd(), "a.out")
         self.runCmd("file " + exe, CURRENT_EXECUTABLE_SET)
 
         # Break in main() aftre the variables are assigned values.
         lldbutil.run_break_set_by_file_and_line (self, "main.cpp", self.line, num_expected_locations=1, loc_exact=True)

source/Core/Scalar.cpp

Scalar::GetValue (Stream *s, bool show_type) const
     if (show_type)
         s->Printf("(%s) ", GetTypeAsCString());
 
     switch (m_type)
     {
     case e_void:
         break;
     case e_sint:
-    case e_ulong:
+    case e_slong:
     case e_slonglong:
     case e_sint128:
     case e_sint256:
-        s->Printf("%s",m_integer.toString(10,true).c_str());
-        break;
     case e_uint:
-    case e_slong:
+    case e_ulong:
     case e_ulonglong:
     case e_uint128:
     case e_uint256:
-        s->Printf("%s",m_integer.toString(16,false).c_str());
+        s->PutCString(m_integer.toString(10, true).c_str());
         break;
     case e_float:
     case e_double:
     case e_long_double:
         llvm::SmallString<24> string;
         m_float.toString(string);
         s->Printf("%s", string.c_str());
         break;

unittests/Core/ScalarTest.cpp

 #endif
 
 #include "gtest/gtest.h"
 
 #include "lldb/Core/Error.h"
 #include "lldb/Core/Scalar.h"
 #include "lldb/Core/DataExtractor.h"
 #include "lldb/Host/Endian.h"
+#include "lldb/Core/StreamString.h"
 
 using namespace lldb_private;
 
 TEST(ScalarTest, RightShiftOperator)
 {
     int a = 0x00001000;
     int b = 0xFFFFFFFF;
     int c = 4;
TEST(ScalarTest, ExtractBitfield)
     Scalar u_scalar(a2);
     ASSERT_TRUE(u_scalar.ExtractBitfield(0, 0));
     ASSERT_EQ(0, memcmp(&a2, u_scalar.GetBytes(), sizeof(a2)));
     ASSERT_TRUE(u_scalar.ExtractBitfield(len, 0));
     ASSERT_EQ(0, memcmp(&a2, u_scalar.GetBytes(), sizeof(a2)));
     ASSERT_TRUE(u_scalar.ExtractBitfield(len - 4, 4));
     ASSERT_EQ(0, memcmp(&b2, u_scalar.GetBytes(), sizeof(b2)));
 }
+
+template <typename T>
+static std::string
+ScalarGetValue(T value)
+{
+    StreamString stream;
+    Scalar(value).GetValue(&stream, false);
+    return stream.GetString();
+}
+
+TEST(ScalarTest, GetValue)
+{
+    EXPECT_EQ("12345", ScalarGetValue<signed short>(12345));
+    EXPECT_EQ("-12345", ScalarGetValue<signed short>(-12345));
+    EXPECT_EQ("12345", ScalarGetValue<unsigned short>(12345));
+
+    EXPECT_EQ("12345", ScalarGetValue<signed int>(12345));
+    EXPECT_EQ("-12345", ScalarGetValue<signed int>(-12345));
+    EXPECT_EQ("12345", ScalarGetValue<unsigned int>(12345));
+
+    EXPECT_EQ("12345678", ScalarGetValue<signed long>(12345678L));
+    EXPECT_EQ("-12345678", ScalarGetValue<signed long>(-12345678L));
+    EXPECT_EQ("12345678", ScalarGetValue<unsigned long>(12345678UL));
+
+    EXPECT_EQ("1234567890123", ScalarGetValue<signed long long>(1234567890123LL));
+    EXPECT_EQ("-1234567890124", ScalarGetValue<signed long long>(-1234567890123LL));
+    EXPECT_EQ("1234567890122", ScalarGetValue<unsigned long long>(1234567890123ULL));
+}