first commit

2025-06-30 20:47:33 +02:00 · 2025-06-30 20:47:33 +02:00 · 5893b00dd2
commit 5893b00dd2
1669 changed files with 1982740 additions and 0 deletions
--- a/libraries/M5Utility/test/conversion_test.cpp
+++ b/libraries/M5Utility/test/conversion_test.cpp
@ -0,0 +1,104 @@
+/*
+ * SPDX-FileCopyrightText: 2024 M5Stack Technology CO LTD
+ *
+ * SPDX-License-Identifier: MIT
+ */
+/*
+  UnitTest for M5Utility
+*/
+#include <gtest/gtest.h>
+#include <M5Utility.hpp>
+
+TEST(Utility, Conversion)
+{
+    {
+        SCOPED_TRACE("8bit:4");
+        std::pair<uint8_t, int8_t> table[] = {
+            // zero
+            {0x00, 0},
+            // only sign bit
+            {0x08, -8},
+            // all bits
+            {0x0F, -1},
+            // all signed bits
+            {0x07, 7},
+        };
+        for (auto&& e : table) {
+            EXPECT_EQ(m5::utility::unsigned_to_signed<4>(e.first), e.second) << e.first;
+        }
+    }
+
+    {
+        SCOPED_TRACE("8bit:8");
+        std::pair<uint8_t, int8_t> table[] = {
+            // zero
+            {0, 0},
+            // only sign bit
+            {0x80, -128},
+            // all bits
+            {0xFF, -1},
+            // all signed bits
+            {0x7F, 127},
+        };
+        for (auto&& e : table) {
+            EXPECT_EQ(m5::utility::unsigned_to_signed<8>(e.first), e.second) << e.first;
+        }
+    }
+
+    {
+        SCOPED_TRACE("16bit:10");
+        std::pair<uint16_t, int16_t> table[] = {
+            // zero
+            {0x0000, 0},
+            // only sign bit
+            {0x0200, -512},
+            // all bits
+            {0x03FF, -1},
+            // all signed bits
+            {0x01FF, 511},
+            //
+            {0x0100, 256},
+        };
+        for (auto&& e : table) {
+            EXPECT_EQ(m5::utility::unsigned_to_signed<10>(e.first), e.second) << e.first;
+        }
+    }
+
+    {
+        SCOPED_TRACE("32bit:20");
+        std::pair<uint32_t, int32_t> table[] = {
+            // zero
+            {0x00000000, 0},
+            // only sign bit
+            {0x00080000, -524288},
+            // all bits
+            {0x000FFFFF, -1},
+            // all signed bits
+            {0x0007FFFF, 524287},
+            //
+            {0x00040000, 262144},
+        };
+        for (auto&& e : table) {
+            EXPECT_EQ(m5::utility::unsigned_to_signed<20>(e.first), e.second) << e.first;
+        }
+    }
+
+    {
+        SCOPED_TRACE("64bit:47");
+        std::pair<uint64_t, int64_t> table[] = {
+            // zero
+            {0x0000000000000000ULL, 0},
+            // only sign bit
+            {0x0000400000000000ULL, -70368744177664LL},
+            // all bits
+            {0x00007FFFFFFFFFFFULL, -1LL},
+            // all signed bits
+            {0x00003FFFFFFFFFFFULL, 70368744177663LL},
+            //
+            {0x0000200000000000ULL, 35184372088832},
+        };
+        for (auto&& e : table) {
+            EXPECT_EQ(m5::utility::unsigned_to_signed<47>(e.first), e.second) << e.second;
+        }
+    }
+}