Add common data structures
This adds some common data structures and functions needed for RDE BEJ.
The decoder core is written in C so that we can use this with some other
future platforms.
clang-tidy is complaining about C style header. I tried adding a
.clang-tidy-ignore file but it did not work. And since this is mainly a
C library, I deleted the .clang-tidy.
Signed-off-by: Kasun Athukorala <kasunath@google.com>
Change-Id: Ice07527b23cd00c65cd11ed114ea4faefcc085fb
diff --git a/.clang-tidy b/.clang-tidy
deleted file mode 100644
index bdf15ab..0000000
--- a/.clang-tidy
+++ /dev/null
@@ -1,299 +0,0 @@
-Checks: '
--*,
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-
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-
diff --git a/include/rde_common.h b/include/rde_common.h
new file mode 100644
index 0000000..bb55a37
--- /dev/null
+++ b/include/rde_common.h
@@ -0,0 +1,218 @@
+#pragma once
+
+#include <stdint.h>
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+/**
+ * @brief If expr is non zero, return with that value.
+ */
+#ifndef RETURN_IF_IERROR
+#define RETURN_IF_IERROR(expr) \
+ do \
+ { \
+ int __status = (expr); \
+ if (__status != 0) \
+ { \
+ return __status; \
+ } \
+ } while (0)
+#endif
+
+ /**
+ * @brief RDE BEJ decoding errors.
+ */
+ enum BejError
+ {
+ BejErrorNoError = 0,
+ BejErrorUnknown,
+ BejErrorInvalidSize,
+ BejErrorNotSuppoted,
+ BejErrorUnknownProperty,
+ BejErrorInvalidSchemaType,
+ BejErrorInvalidPropertyOffset,
+ };
+
+ /**
+ * @brief BEJ schema classes.
+ */
+ enum BejSchemaClass
+ {
+ BejMajorSchemaClass = 0,
+ BejEventSchemaClass = 1,
+ BejAnnotationSchemaClass = 2,
+ BejCollectionMemberTypeSchemaClass = 3,
+ BejErrorSchemaClass = 4,
+ };
+
+ /**
+ * @brief BEJ data types supported in BEJ version 0xF1F0F000.
+ */
+ enum BejPrincipalDataType
+ {
+ BejSet = 0,
+ BejArray = 1,
+ BejNull = 2,
+ BejInteger = 3,
+ BejEnum = 4,
+ BejString = 5,
+ BejReal = 6,
+ BejBoolean = 7,
+ BejBytestring = 8,
+ BejChoice = 9,
+ BejPropertyAnnotation = 10,
+ Reserved1 = 11,
+ Reserved2 = 12,
+ Reserved3 = 13,
+ BejResourceLink = 14,
+ BejResourceLinkExpansion = 15,
+ };
+
+ /**
+ * @brief Format BEJ tuple.
+ */
+ struct BejTupleF
+ {
+ uint8_t deferredBinding : 1;
+ uint8_t readOnlyProperty : 1;
+ uint8_t nullableProperty : 1;
+ uint8_t reserved : 1;
+ enum BejPrincipalDataType principalDataType : 4;
+ } __attribute__((__packed__));
+
+ /**
+ * @brief Sequence Number BEJ tuple.
+ */
+ struct BejTupleS
+ {
+ uint8_t schema;
+ // Dictionaries contain 16bit sequence numbers. So allocating 16bits for
+ // the sequence number here.
+ uint16_t sequenceNumber;
+ };
+
+ /**
+ * @brief Represent offsets of Format, Value Length and Value of a SFLV
+ * tuple.
+ */
+ struct BejSFLVOffset
+ {
+ uint32_t formatOffset;
+ uint32_t valueLenNnintOffset;
+ uint32_t valueOffset;
+ };
+
+ /**
+ * @brief Fields in Bej Real data type.
+ */
+ struct BejReal
+ {
+ // Number bytes in exp.
+ uint8_t expLen;
+ int64_t whole;
+ uint64_t zeroCount;
+ uint64_t fract;
+ int64_t exp;
+ };
+
+ /**
+ * @brief SFLV BEJ tuple infomation.
+ */
+ struct BejSFLV
+ {
+ struct BejTupleS tupleS;
+ struct BejTupleF format;
+ // Value portion size in bytes.
+ uint32_t valueLength;
+ // Value end-offset with respect to the begining of the encoded stream.
+ uint32_t valueEndOffset;
+ // Pointer to the value.
+ const uint8_t* value;
+ };
+
+ /**
+ * @brief bejEncoding PLDM data type header.
+ */
+ struct BejPldmBlockHeader
+ {
+ uint32_t bejVersion;
+ uint16_t reserved;
+ uint8_t schemaClass;
+ } __attribute__((__packed__));
+
+ enum RdeOperationInitType
+ {
+ RdeOpInitOperationHead = 0,
+ RdeOpInitOperationRead = 1,
+ RdeOpInitOperationCreate = 2,
+ RdeOpInitOperationDelete = 3,
+ RdeOpInitOperationUpdate = 4,
+ RdeOpInitOperationReplace = 5,
+ RdeOpInitOperationAction = 6,
+ };
+
+ enum RdeMultiReceiveTransferFlag
+ {
+ RdeMRecFlagStart = 0,
+ RdeMRecFlagMiddle = 1,
+ RdeMRecFlagEnd = 2,
+ RdeMRecFlagStartAndEnd = 3,
+ };
+
+ struct RdeOperationInitReqHeader
+ {
+ uint32_t resourceID;
+ uint16_t operationID;
+ uint8_t operationType;
+
+ // OperationFlags bits
+ uint8_t locatorValid : 1;
+ uint8_t containsRequestPayload : 1;
+ uint8_t containsCustomRequestParameters : 1;
+
+ uint8_t reserved : 5;
+ uint32_t sendDataTransferHandle;
+ uint8_t operationLocatorLength;
+ uint32_t requestPayloadLength;
+ } __attribute__((__packed__));
+
+ struct MultipartReceiveResHeader
+ {
+ uint8_t completionCode;
+ uint8_t transferFlag;
+ uint32_t nextDataTransferHandle;
+ uint32_t dataLengthBytes;
+ } __attribute__((__packed__));
+
+ /**
+ * @brief Get the unsigned integer value from provided bytes.
+ *
+ * @param bytes - valid pointer to a byte stream in little-endian format.
+ * @param numOfBytes - number of bytes belongs to the value. Maximum number
+ * of bytes supported is 8. If numOfBytes > 8, the result is undefined.
+ * @return unsigend 64bit representation of the value.
+ */
+ uint64_t rdeGetUnsignedInteger(const uint8_t* bytes, uint8_t numOfBytes);
+
+ /**
+ * @brief Get the value from nnint type.
+ *
+ * @param nnint - nnint should be pointing to a valid nnint.
+ * @return unsigend 64bit representation of the value.
+ */
+ uint64_t rdeGetNnint(const uint8_t* nnint);
+
+ /**
+ * @brief Get the size of the complete nnint.
+ *
+ * @param nnint - pointer to a valid nnint.
+ * @return size of the complete nnint.
+ */
+ uint8_t rdeGetNnintSize(const uint8_t* nnint);
+
+#ifdef __cplusplus
+}
+#endif
diff --git a/meson.build b/meson.build
new file mode 100644
index 0000000..85ffb79
--- /dev/null
+++ b/meson.build
@@ -0,0 +1,18 @@
+project(
+ 'libbej',
+ 'c',
+ 'cpp',
+ version: '0.1',
+ meson_version: '>=0.57.0',
+ default_options: [
+ 'c_std=c18',
+ 'cpp_std=c++20',
+ 'werror=true',
+ 'warning_level=3',
+ ])
+
+libbej_incs = include_directories('include')
+subdir('src')
+if not get_option('tests').disabled()
+ subdir('test')
+endif
diff --git a/meson_options.txt b/meson_options.txt
new file mode 100644
index 0000000..0fc2767
--- /dev/null
+++ b/meson_options.txt
@@ -0,0 +1 @@
+option('tests', type: 'feature', description: 'Build tests')
diff --git a/src/meson.build b/src/meson.build
new file mode 100644
index 0000000..0d2703d
--- /dev/null
+++ b/src/meson.build
@@ -0,0 +1,11 @@
+libbej_lib = static_library(
+ 'libbej',
+ 'rde_common.c',
+ include_directories : libbej_incs,
+ implicit_include_directories: false
+)
+
+libbej = declare_dependency(
+ include_directories: libbej_incs,
+ link_with: libbej_lib
+)
diff --git a/src/rde_common.c b/src/rde_common.c
new file mode 100644
index 0000000..258a543
--- /dev/null
+++ b/src/rde_common.c
@@ -0,0 +1,25 @@
+#include "rde_common.h"
+
+uint64_t rdeGetUnsignedInteger(const uint8_t* bytes, uint8_t numOfBytes)
+{
+ uint64_t num = 0;
+ for (uint8_t i = 0; i < numOfBytes; ++i)
+ {
+ num |= (uint64_t)(*(bytes + i)) << (i * 8);
+ }
+ return num;
+}
+
+uint64_t rdeGetNnint(const uint8_t* nnint)
+{
+ // In nnint, first byte indicate how many bytes are there. Remaining bytes
+ // represent the value in little-endian format.
+ const uint8_t size = *nnint;
+ return rdeGetUnsignedInteger(nnint + sizeof(uint8_t), size);
+}
+
+uint8_t rdeGetNnintSize(const uint8_t* nnint)
+{
+ // In nnint, first byte indicate how many bytes are there.
+ return *nnint + sizeof(uint8_t);
+}
diff --git a/test/meson.build b/test/meson.build
new file mode 100644
index 0000000..a775a0c
--- /dev/null
+++ b/test/meson.build
@@ -0,0 +1,26 @@
+gtest = dependency('gtest', main: true, disabler: true, required: get_option('tests'))
+gmock = dependency('gmock', disabler: true, required: get_option('tests'))
+
+if not gtest.found() or not gmock.found()
+ gtest_proj = import('cmake').subproject('googletest', required: false)
+ if gtest_proj.found()
+ gtest = declare_dependency(
+ dependencies: [
+ gtest_proj.dependency('gtest'),
+ gtest_proj.dependency('gtest_main'),
+ ])
+ gmock = gtest_proj.dependency('gmock')
+ else
+ assert(not get_option('tests').enabled(), 'Googletest is required')
+ endif
+endif
+
+gtests = [
+ 'rde_common',
+]
+foreach t : gtests
+ test(t, executable(t.underscorify(), t + '_test.cpp',
+ build_by_default: false,
+ implicit_include_directories: false,
+ dependencies: [libbej, gtest, gmock]))
+endforeach
diff --git a/test/rde_common_test.cpp b/test/rde_common_test.cpp
new file mode 100644
index 0000000..3217ffd
--- /dev/null
+++ b/test/rde_common_test.cpp
@@ -0,0 +1,39 @@
+#include "rde_common.h"
+
+#include <gmock/gmock-matchers.h>
+#include <gmock/gmock.h>
+#include <gtest/gtest.h>
+
+namespace rde
+{
+
+TEST(RdeCommonTest, RdeGetUnsignedIntegerTest)
+{
+ constexpr uint8_t bytes[] = {0xab, 0xcd, 0xef, 0x12,
+ 0x13, 0x65, 0x23, 0x89};
+ EXPECT_THAT(rdeGetUnsignedInteger(bytes, /*numOfBytes=*/1), 0xab);
+ EXPECT_THAT(rdeGetUnsignedInteger(bytes, /*numOfBytes=*/2), 0xcdab);
+ EXPECT_THAT(rdeGetUnsignedInteger(bytes, /*numOfBytes=*/5), 0x1312efcdab);
+ EXPECT_THAT(rdeGetUnsignedInteger(bytes, /*numOfBytes=*/8),
+ 0x8923651312efcdab);
+}
+
+TEST(RdeCommonTest, RdeGetNnintTest)
+{
+ constexpr uint8_t nnint1[] = {0x03, 0xcd, 0xef, 0x12};
+ constexpr uint8_t nnint2[] = {0x08, 0xab, 0xcd, 0xef, 0x12,
+ 0x13, 0x65, 0x23, 0x89};
+ EXPECT_THAT(rdeGetNnint(nnint1), 0x12efcd);
+ EXPECT_THAT(rdeGetNnint(nnint2), 0x8923651312efcdab);
+}
+
+TEST(RdeCommonTest, RdeGetNnintSizeTest)
+{
+ constexpr uint8_t nnint1[] = {0x03, 0xcd, 0xef, 0x12};
+ constexpr uint8_t nnint2[] = {0x08, 0xab, 0xcd, 0xef, 0x12,
+ 0x13, 0x65, 0x23, 0x89};
+ EXPECT_THAT(rdeGetNnintSize(nnint1), 4);
+ EXPECT_THAT(rdeGetNnintSize(nnint2), 9);
+}
+
+} // namespace rde