libc: add CRC-8-ROHC support

Signed-off-by: yinshengkai <yinshengkai@xiaomi.com>

include/nuttx/crc8.h

@@ -106,6 +106,18 @@ uint8_t crc8ccitt(FAR const uint8_t *src, size_t len);
 
 uint8_t crc8ccittpart(FAR const uint8_t *src, size_t len, uint8_t crc8val);
 
+/****************************************************************************
+ * Name: crc8rohcpart
+ ****************************************************************************/
+
+uint8_t crc8rohcpart(FAR const uint8_t *src, size_t len, uint8_t crc8val);
+
+/****************************************************************************
+ * Name: crc8rohc
+ ****************************************************************************/
+
+uint8_t crc8rohc(FAR const uint8_t *src, size_t len);
+
 #undef EXTERN
 #ifdef __cplusplus
 }

libs/libc/misc/CMakeLists.txt

@@ -83,6 +83,7 @@ list(
   lib_crc16ccitt.c
   lib_crc8.c
   lib_crc8ccitt.c
+  lib_crc8rohc.c
   lib_crc8table.c
   lib_glob.c
   lib_backtrace.c

libs/libc/misc/Make.defs

@@ -42,8 +42,8 @@ endif
 
 CSRCS += lib_dumpbuffer.c lib_dumpvbuffer.c lib_fnmatch.c lib_debug.c
 CSRCS += lib_crc64.c lib_crc32.c lib_crc16.c lib_crc16ccitt.c lib_crc8.c
-CSRCS += lib_crc8ccitt.c lib_crc8table.c lib_glob.c lib_backtrace.c
-CSRCS += lib_ftok.c lib_err.c lib_instrument.c
+CSRCS += lib_crc8ccitt.c lib_crc8table.c lib_crc8rohc.c lib_glob.c
+CSRCS += lib_backtrace.c lib_ftok.c lib_err.c lib_instrument.c
 
 # Keyboard driver encoder/decoder
 

libs/libc/misc/lib_crc8rohc.c

@@ -0,0 +1,90 @@
+/****************************************************************************
+ * libs/libc/misc/lib_crc8rohc.c
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.  The
+ * ASF licenses this file to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance with the
+ * License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+ * License for the specific language governing permissions and limitations
+ * under the License.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <sys/types.h>
+#include <stdint.h>
+
+#include <nuttx/crc8.h>
+
+/****************************************************************************
+ * Private Data
+ ****************************************************************************/
+
+static const uint8_t g_crc8_tab[256] =
+{
+  0x00, 0x91, 0xe3, 0x72, 0x07, 0x96, 0xe4, 0x75,
+  0x0e, 0x9f, 0xed, 0x7c, 0x09, 0x98, 0xea, 0x7b,
+  0x1c, 0x8d, 0xff, 0x6e, 0x1b, 0x8a, 0xf8, 0x69,
+  0x12, 0x83, 0xf1, 0x60, 0x15, 0x84, 0xf6, 0x67,
+  0x38, 0xa9, 0xdb, 0x4a, 0x3f, 0xae, 0xdc, 0x4d,
+  0x36, 0xa7, 0xd5, 0x44, 0x31, 0xa0, 0xd2, 0x43,
+  0x24, 0xb5, 0xc7, 0x56, 0x23, 0xb2, 0xc0, 0x51,
+  0x2a, 0xbb, 0xc9, 0x58, 0x2d, 0xbc, 0xce, 0x5f,
+  0x70, 0xe1, 0x93, 0x02, 0x77, 0xe6, 0x94, 0x05,
+  0x7e, 0xef, 0x9d, 0x0c, 0x79, 0xe8, 0x9a, 0x0b,
+  0x6c, 0xfd, 0x8f, 0x1e, 0x6b, 0xfa, 0x88, 0x19,
+  0x62, 0xf3, 0x81, 0x10, 0x65, 0xf4, 0x86, 0x17,
+  0x48, 0xd9, 0xab, 0x3a, 0x4f, 0xde, 0xac, 0x3d,
+  0x46, 0xd7, 0xa5, 0x34, 0x41, 0xd0, 0xa2, 0x33,
+  0x54, 0xc5, 0xb7, 0x26, 0x53, 0xc2, 0xb0, 0x21,
+  0x5a, 0xcb, 0xb9, 0x28, 0x5d, 0xcc, 0xbe, 0x2f,
+  0xe0, 0x71, 0x03, 0x92, 0xe7, 0x76, 0x04, 0x95,
+  0xee, 0x7f, 0x0d, 0x9c, 0xe9, 0x78, 0x0a, 0x9b,
+  0xfc, 0x6d, 0x1f, 0x8e, 0xfb, 0x6a, 0x18, 0x89,
+  0xf2, 0x63, 0x11, 0x80, 0xf5, 0x64, 0x16, 0x87,
+  0xd8, 0x49, 0x3b, 0xaa, 0xdf, 0x4e, 0x3c, 0xad,
+  0xd6, 0x47, 0x35, 0xa4, 0xd1, 0x40, 0x32, 0xa3,
+  0xc4, 0x55, 0x27, 0xb6, 0xc3, 0x52, 0x20, 0xb1,
+  0xca, 0x5b, 0x29, 0xb8, 0xcd, 0x5c, 0x2e, 0xbf,
+  0x90, 0x01, 0x73, 0xe2, 0x97, 0x06, 0x74, 0xe5,
+  0x9e, 0x0f, 0x7d, 0xec, 0x99, 0x08, 0x7a, 0xeb,
+  0x8c, 0x1d, 0x6f, 0xfe, 0x8b, 0x1a, 0x68, 0xf9,
+  0x82, 0x13, 0x61, 0xf0, 0x85, 0x14, 0x66, 0xf7,
+  0xa8, 0x39, 0x4b, 0xda, 0xaf, 0x3e, 0x4c, 0xdd,
+  0xa6, 0x37, 0x45, 0xd4, 0xa1, 0x30, 0x42, 0xd3,
+  0xb4, 0x25, 0x57, 0xc6, 0xb3, 0x22, 0x50, 0xc1,
+  0xba, 0x2b, 0x59, 0xc8, 0xbd, 0x2c, 0x5e, 0xcf
+};
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: crc8rohcpart
+ ****************************************************************************/
+
+uint8_t crc8rohcpart(FAR const uint8_t *src, size_t len, uint8_t crc8val)
+{
+  return crc8table(g_crc8_tab, src, len, crc8val);
+}
+
+/****************************************************************************
+ * Name: crc8rohc
+ ****************************************************************************/
+
+uint8_t crc8rohc(FAR const uint8_t *src, size_t len)
+{
+  return crc8rohcpart(src, len, 0xff);
+}