PEL: Add BCD time helpers for PELs
A PEL stores time in BCD, with a byte each for:
* year MSB
* year LSB
* month
* day
* hour
* minutes
* seconds
* hundredths
This commit adds a structure to represent this, and functions to:
* Create a BCD structure from a std::chrono::time_point
* Convert any number to BCD
* Write the BCD structure into a Stream
* Extract a BCD structure from a Stream
Refresher: The BCD value of 32 is 0x32.
Signed-off-by: Matt Spinler <spinler@us.ibm.com>
Change-Id: I09ea4098f3a3981931f595d11fb63aff31d9fb0d
diff --git a/test/openpower-pels/Makefile.include b/test/openpower-pels/Makefile.include
index 295069a..a68b229 100644
--- a/test/openpower-pels/Makefile.include
+++ b/test/openpower-pels/Makefile.include
@@ -2,6 +2,7 @@
check_PROGRAMS += \
additional_data_test \
+ bcd_time_test \
stream_test
additional_data_test_SOURCES = %reldir%/additional_data_test.cpp
@@ -14,4 +15,13 @@
stream_test_CPPFLAGS = $(test_cppflags)
stream_test_CXXFLAGS = $(test_cxxflags)
stream_test_LDADD = $(test_ldadd)
-stream_test_LDFLAGS = $(test_ldflags)
\ No newline at end of file
+stream_test_LDFLAGS = $(test_ldflags)
+
+bcd_time_test_SOURCES = \
+ %reldir%/bcd_time_test.cpp
+bcd_time_test_CPPFLAGS = $(test_cppflags)
+bcd_time_test_CXXFLAGS = $(test_cxxflags)
+bcd_time_test_LDADD = \
+ $(test_ldadd) \
+ $(top_builddir)/extensions/openpower-pels/bcd_time.o
+bcd_time_test_LDFLAGS = $(test_ldflags)
\ No newline at end of file
diff --git a/test/openpower-pels/bcd_time_test.cpp b/test/openpower-pels/bcd_time_test.cpp
new file mode 100644
index 0000000..f1b7663
--- /dev/null
+++ b/test/openpower-pels/bcd_time_test.cpp
@@ -0,0 +1,80 @@
+#include "extensions/openpower-pels/bcd_time.hpp"
+
+#include <gtest/gtest.h>
+
+using namespace openpower::pels;
+
+TEST(BCDTimeTest, ToBCDTest)
+{
+ EXPECT_EQ(toBCD(0), 0x00);
+ EXPECT_EQ(toBCD(1), 0x01);
+ EXPECT_EQ(toBCD(10), 0x10);
+ EXPECT_EQ(toBCD(99), 0x99);
+ EXPECT_EQ(toBCD(37), 0x37);
+ EXPECT_EQ(toBCD(60), 0x60);
+ EXPECT_EQ(toBCD(12345678), 0x12345678);
+ EXPECT_EQ(toBCD(0xF), 0x15);
+}
+
+TEST(BCDTimeTest, FlattenUnflattenTest)
+{
+ std::vector<uint8_t> data{1, 2, 3, 4, 5, 6, 7, 8};
+ Stream stream{data};
+ BCDTime bcd;
+
+ // Unflatten
+ stream >> bcd;
+
+ EXPECT_EQ(bcd.yearMSB, 1);
+ EXPECT_EQ(bcd.yearLSB, 2);
+ EXPECT_EQ(bcd.month, 3);
+ EXPECT_EQ(bcd.day, 4);
+ EXPECT_EQ(bcd.hour, 5);
+ EXPECT_EQ(bcd.minutes, 6);
+ EXPECT_EQ(bcd.seconds, 7);
+ EXPECT_EQ(bcd.hundredths, 8);
+
+ // Flatten
+ uint8_t val = 0x20;
+ bcd.yearMSB = val++;
+ bcd.yearLSB = val++;
+ bcd.month = val++;
+ bcd.day = val++;
+ bcd.hour = val++;
+ bcd.minutes = val++;
+ bcd.seconds = val++;
+ bcd.hundredths = val++;
+
+ stream.offset(0);
+ stream << bcd;
+
+ for (size_t i = 0; i < 8; i++)
+ {
+ EXPECT_EQ(data[i], 0x20 + i);
+ }
+}
+
+TEST(BCDTimeTest, ConvertTest)
+{
+ // Convert a time_point into BCDTime
+ tm time_tm;
+ time_tm.tm_year = 125;
+ time_tm.tm_mon = 11;
+ time_tm.tm_mday = 31;
+ time_tm.tm_hour = 15;
+ time_tm.tm_min = 23;
+ time_tm.tm_sec = 42;
+ time_tm.tm_isdst = 0;
+
+ auto timepoint = std::chrono::system_clock::from_time_t(mktime(&time_tm));
+ auto timeInBCD = getBCDTime(timepoint);
+
+ EXPECT_EQ(timeInBCD.yearMSB, 0x20);
+ EXPECT_EQ(timeInBCD.yearLSB, 0x25);
+ EXPECT_EQ(timeInBCD.month, 0x12);
+ EXPECT_EQ(timeInBCD.day, 0x31);
+ EXPECT_EQ(timeInBCD.hour, 0x15);
+ EXPECT_EQ(timeInBCD.minutes, 0x23);
+ EXPECT_EQ(timeInBCD.seconds, 0x42);
+ EXPECT_EQ(timeInBCD.hundredths, 0x00);
+}