From a3fdcc0bf639caafc714341d67da5530aeca867e Mon Sep 17 00:00:00 2001
From: Wang Yaofu <voipman@sina.cn>
Date: Wed, 25 Aug 2021 18:46:12 +0800
Subject: [PATCH] add function to calc crc poly

---
 unit-test/crc_test.cpp | 68 ++++++++++++++++++++++++++++++++++++++++--
 1 file changed, 66 insertions(+), 2 deletions(-)

diff --git a/unit-test/crc_test.cpp b/unit-test/crc_test.cpp
index 482c0b4..288d65c 100644
--- a/unit-test/crc_test.cpp
+++ b/unit-test/crc_test.cpp
@@ -6,11 +6,27 @@
 */
 
 #include "ut/test_harness.h"
+#include "../crc/crc8.h"
 #include "../crc/crc16.h"
 #include "../crc/crc32.h"
 #include "../crc/crc64.h"
+#include "../crc/crc_poly.h"
 #include <iostream>
 
+TEST(CRC8Test, BasicTest)
+{
+    const char* inData = "123456789";
+    uint8_t expect = 0xa2;
+    EXPECT_EQ(crc8_msb(inData, 9), expect);
+
+    const char* data = "Hello World!!!";
+    expect = 0x68;
+    EXPECT_EQ(crc8_msb(data, strlen(data)), expect);
+
+    expect = 0x2c;
+    EXPECT_EQ(crc8_lsb(data, strlen(data)), expect);
+}
+
 TEST(CRC16Test, BasicTest)
 {
     const char* inData = "123456789";
@@ -22,7 +38,7 @@ TEST(CRC16Test, BasicTest)
 TEST(CRC32Test, BasicTest)
 {
     const char* inData = "123456789";
-    uint32_t expect = 3421780262 ;
+    uint32_t expect = 0xCBF43926;
 
     EXPECT_EQ(crc32(inData, 9), expect);
 }
@@ -31,6 +47,54 @@ TEST(CRC64Test, BasicTest)
 {
     const char* inData = "123456789";
 
-    uint64_t expect = 16845390139448941002L;
+    uint64_t expect = 0xe9c6d914c4b8d9caL;
     EXPECT_EQ(crc64(inData, 9), expect);
 }
+
+TEST(CRC8PolyTest, BasicTest)
+{
+    uint8_t poly = 0x31;
+    uint8_t crcTab[0xFF+1] = {0};
+    uint8_t expect = 0x00;
+    EXPECT_EQ(crc8_poly_msb(poly, 0), expect);
+    expect = 0x31;
+    EXPECT_EQ(crc8_poly_msb(poly, 1), expect);
+    expect = 0xac;
+    EXPECT_EQ(crc8_poly_msb(poly, 0xFF), expect);
+
+    /**
+    for (int i = 0; i <= 0xff; ++i) {
+        if (i % 8 == 0) {
+            printf("\n");
+        }
+        crcTab[i] = crc8_poly_lsb(poly, i);
+        printf("0x%.2x, ", crcTab[i]);
+    }
+     */
+}
+
+TEST(CRC16PolyTest, BasicTest)
+{
+    // poly = x^16 + x^12 + x^5 + 1 = 0x1021
+    uint16_t poly = 0x1021;
+    uint16_t crcTab[0xFF+1] = {0};
+    uint16_t expect = 0x0000;
+    EXPECT_EQ(crc16_poly_msb(poly, 0), expect);
+    expect = 0x1021;
+    EXPECT_EQ(crc16_poly_msb(poly, 1), expect);
+    expect = 0x1ef0;
+    EXPECT_EQ(crc16_poly_msb(poly, 0xFF), expect);
+}
+
+TEST(CRC32PolyTest, BasicTest)
+{
+    uint32_t poly = 0xedb88320;
+    uint32_t crcTab[0xFF+1] = {0};
+    uint32_t expect = 0x00000000L;
+    EXPECT_EQ(crc32_poly(poly, 0), expect);
+    expect = 0x77073096L;
+    EXPECT_EQ(crc32_poly(poly, 1), expect);
+    expect = 0x2d02ef8dL;
+    EXPECT_EQ(crc32_poly(poly, 0xFF), expect);
+}
+