chore: initial commit

.clang-format

@@ -0,0 +1,168 @@
+---
+Language:        Cpp
+# BasedOnStyle:  Google
+AccessModifierOffset: -1
+AlignAfterOpenBracket: Align
+AlignConsecutiveMacros: false
+AlignConsecutiveAssignments: false
+AlignConsecutiveDeclarations: false
+AlignEscapedNewlines: Left
+AlignOperands:   true
+AlignTrailingComments: true
+AllowAllArgumentsOnNextLine: true
+AllowAllConstructorInitializersOnNextLine: true
+AllowAllParametersOfDeclarationOnNextLine: true
+AllowShortBlocksOnASingleLine: Never
+AllowShortCaseLabelsOnASingleLine: false
+AllowShortFunctionsOnASingleLine: All
+AllowShortLambdasOnASingleLine: All
+AllowShortIfStatementsOnASingleLine: WithoutElse
+AllowShortLoopsOnASingleLine: true
+AlwaysBreakAfterDefinitionReturnType: None
+AlwaysBreakAfterReturnType: None
+AlwaysBreakBeforeMultilineStrings: true
+AlwaysBreakTemplateDeclarations: Yes
+BinPackArguments: true
+BinPackParameters: true
+BraceWrapping:
+  AfterCaseLabel:  false
+  AfterClass:      false
+  AfterControlStatement: false
+  AfterEnum:       false
+  AfterFunction:   false
+  AfterNamespace:  false
+  AfterObjCDeclaration: false
+  AfterStruct:     false
+  AfterUnion:      false
+  AfterExternBlock: false
+  BeforeCatch:     false
+  BeforeElse:      false
+  IndentBraces:    false
+  SplitEmptyFunction: true
+  SplitEmptyRecord: true
+  SplitEmptyNamespace: true
+BreakBeforeBinaryOperators: None
+BreakBeforeBraces: Attach
+BreakBeforeInheritanceComma: false
+BreakInheritanceList: BeforeColon
+BreakBeforeTernaryOperators: true
+BreakConstructorInitializersBeforeComma: false
+BreakConstructorInitializers: BeforeColon
+BreakAfterJavaFieldAnnotations: false
+BreakStringLiterals: true
+ColumnLimit:     80
+CommentPragmas:  '^ IWYU pragma:'
+CompactNamespaces: false
+ConstructorInitializerAllOnOneLineOrOnePerLine: true
+ConstructorInitializerIndentWidth: 4
+ContinuationIndentWidth: 4
+Cpp11BracedListStyle: true
+DeriveLineEnding: true
+DerivePointerAlignment: true
+DisableFormat:   false
+ExperimentalAutoDetectBinPacking: false
+FixNamespaceComments: true
+ForEachMacros:
+  - foreach
+  - Q_FOREACH
+  - BOOST_FOREACH
+IncludeBlocks:   Regroup
+IncludeCategories:
+  - Regex:           '^<ext/.*\.h>'
+    Priority:        2
+    SortPriority:    0
+  - Regex:           '^<.*\.h>'
+    Priority:        1
+    SortPriority:    0
+  - Regex:           '^<.*'
+    Priority:        2
+    SortPriority:    0
+  - Regex:           '.*'
+    Priority:        3
+    SortPriority:    0
+IncludeIsMainRegex: '([-_](test|unittest))?$'
+IncludeIsMainSourceRegex: ''
+IndentCaseLabels: true
+IndentGotoLabels: true
+IndentPPDirectives: None
+IndentWidth:     2
+IndentWrappedFunctionNames: false
+JavaScriptQuotes: Leave
+JavaScriptWrapImports: true
+KeepEmptyLinesAtTheStartOfBlocks: false
+MacroBlockBegin: ''
+MacroBlockEnd:   ''
+MaxEmptyLinesToKeep: 1
+NamespaceIndentation: None
+ObjCBinPackProtocolList: Never
+ObjCBlockIndentWidth: 2
+ObjCSpaceAfterProperty: false
+ObjCSpaceBeforeProtocolList: true
+PenaltyBreakAssignment: 2
+PenaltyBreakBeforeFirstCallParameter: 1
+PenaltyBreakComment: 300
+PenaltyBreakFirstLessLess: 120
+PenaltyBreakString: 1000
+PenaltyBreakTemplateDeclaration: 10
+PenaltyExcessCharacter: 1000000
+PenaltyReturnTypeOnItsOwnLine: 200
+PointerAlignment: Left
+RawStringFormats:
+  - Language:        Cpp
+    Delimiters:
+      - cc
+      - CC
+      - cpp
+      - Cpp
+      - CPP
+      - 'c++'
+      - 'C++'
+    CanonicalDelimiter: ''
+    BasedOnStyle:    google
+  - Language:        TextProto
+    Delimiters:
+      - pb
+      - PB
+      - proto
+      - PROTO
+    EnclosingFunctions:
+      - EqualsProto
+      - EquivToProto
+      - PARSE_PARTIAL_TEXT_PROTO
+      - PARSE_TEST_PROTO
+      - PARSE_TEXT_PROTO
+      - ParseTextOrDie
+      - ParseTextProtoOrDie
+    CanonicalDelimiter: ''
+    BasedOnStyle:    google
+ReflowComments:  true
+SortIncludes:    true
+SortUsingDeclarations: true
+SpaceAfterCStyleCast: false
+SpaceAfterLogicalNot: false
+SpaceAfterTemplateKeyword: true
+SpaceBeforeAssignmentOperators: true
+SpaceBeforeCpp11BracedList: false
+SpaceBeforeCtorInitializerColon: true
+SpaceBeforeInheritanceColon: true
+SpaceBeforeParens: ControlStatements
+SpaceBeforeRangeBasedForLoopColon: true
+SpaceInEmptyBlock: false
+SpaceInEmptyParentheses: false
+SpacesBeforeTrailingComments: 2
+SpacesInAngles:  false
+SpacesInConditionalStatement: false
+SpacesInContainerLiterals: true
+SpacesInCStyleCastParentheses: false
+SpacesInParentheses: false
+SpacesInSquareBrackets: false
+SpaceBeforeSquareBrackets: false
+Standard:        Auto
+StatementMacros:
+  - Q_UNUSED
+  - QT_REQUIRE_VERSION
+TabWidth:        8
+UseCRLF:         false
+UseTab:          Never
+...
+

.gitignore

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+# Prerequisites
+*.d
+
+# Compiled Object files
+*.slo
+*.lo
+*.o
+*.obj
+
+# Precompiled Headers
+*.gch
+*.pch
+
+# Compiled Dynamic libraries
+*.so
+*.dylib
+*.dll
+
+# Fortran module files
+*.mod
+*.smod
+
+# Compiled Static libraries
+*.lai
+*.la
+*.a
+*.lib
+
+# Executables
+*.exe
+*.out
+*.app
+
+CMakeLists.txt.user
+CMakeCache.txt
+CMakeFiles
+CMakeScripts
+Testing
+Makefile
+cmake_install.cmake
+install_manifest.txt
+compile_commands.json
+CTestTestfile.cmake
+_deps
+
+build/

Compile_ToolChains/00-makefile/invsqrt.cpp

@@ -0,0 +1,14 @@
+float Q_rsqrt(float number)
+{
+    long i;
+    float x2, y;
+    const float threehalfs = 1.5F;
+
+    x2 = number * 0.5F;
+    y = number;
+    i = *(long *)&y;           // evil floating point bit level hacking
+    i = 0x5f3759df - (i >> 1); // what the fuck?
+    y = *(float *)&i;
+    y = y * (threehalfs - (x2 * y * y)); // 1st iteration
+    return y;
+}

Compile_ToolChains/00-makefile/invsqrt.h

@@ -0,0 +1,6 @@
+#ifndef INV_SQRT_H
+#define INV_SQRT_H
+
+float Q_rsqrt( float number );
+
+#endif // INV_SQRT_H

Compile_ToolChains/00-makefile/main.cpp

@@ -0,0 +1,13 @@
+#include <iostream>
+#include "invsqrt.h"
+
+int main()
+{
+    float x;
+    while(1)
+    {
+        std::cout << "input a number(press Ctrl+C to exit):";
+        std::cin >> x;
+        std::cout << Q_rsqrt(x) << std::endl;
+    }
+}

Compile_ToolChains/00-makefile/makefile

@@ -0,0 +1,14 @@
+CXXFLAGS = -std=c++17 -O2
+
+main: main.o invsqrt.o
+	$(CXX) $(CXXFLAGS) -o $@ $^  
+
+main.o: main.cpp invsqrt.h
+	$(CXX) $(CXXFLAGS) -o $@ -c $<
+
+invsqrt.o: invsqrt.cpp invsqrt.h
+	$(CXX) $(CXXFLAGS) -o $@ -c $<
+
+.PHONY: clean
+clean:
+	rm main.o invsqrt.o main

Compile_ToolChains/01-basic/CMakeLists.txt

@@ -0,0 +1,10 @@
+# Set the minimum version of CMake that can be used
+# To find the cmake version run
+# $ cmake --version
+cmake_minimum_required(VERSION 3.5)
+
+# Set the project name
+project (hello_cmake)
+
+# Add an executable
+add_executable(hello main.cpp)

Compile_ToolChains/01-basic/main.cpp

@@ -0,0 +1,6 @@
+#include <iostream>
+
+int main()
+{
+    std::cout << "hello world!" << std::endl;
+}

Compile_ToolChains/02-multifiles/CMakeLists.txt

@@ -0,0 +1,12 @@
+# build part
+cmake_minimum_required(VERSION 3.5)
+project (invsqrt)
+set(SOURCES src/invsqrt.cpp src/main.cpp)
+add_executable(invsqrt ${SOURCES})
+target_include_directories(invsqrt PUBLIC ${PROJECT_SOURCE_DIR}/include)
+
+# debug part
+message("CMAKE_SOURCE_DIR: ${CMAKE_SOURCE_DIR}")
+message("PROJECT_SOURCE_DIR: ${PROJECT_SOURCE_DIR}")
+
+message("SOURCES: ${SOURCES}")

Compile_ToolChains/02-multifiles/include/invsqrt.h

@@ -0,0 +1,6 @@
+#ifndef INV_SQRT_H
+#define INV_SQRT_H
+
+float Q_rsqrt( float number );
+
+#endif // INV_SQRT_H

Compile_ToolChains/02-multifiles/src/invsqrt.cpp

@@ -0,0 +1,14 @@
+float Q_rsqrt(float number)
+{
+    long i;
+    float x2, y;
+    const float threehalfs = 1.5F;
+
+    x2 = number * 0.5F;
+    y = number;
+    i = *(long *)&y;           // evil floating point bit level hacking
+    i = 0x5f3759df - (i >> 1); // what the fuck?
+    y = *(float *)&i;
+    y = y * (threehalfs - (x2 * y * y)); // 1st iteration
+    return y;
+}

Compile_ToolChains/02-multifiles/src/main.cpp

@@ -0,0 +1,13 @@
+#include <iostream>
+#include "../include/invsqrt.h"
+
+int main()
+{
+    float x;
+    while(1)
+    {
+        std::cout << "input a number(press Ctrl+C to exit):";
+        std::cin >> x;
+        std::cout << Q_rsqrt(x) << std::endl;
+    }
+}

Compile_ToolChains/03-static-libraries/CMakeLists.txt

@@ -0,0 +1,10 @@
+cmake_minimum_required(VERSION 3.5)
+project(invsqrt)
+
+# create static library
+add_library(invsqrt_static STATIC src/invsqrt.cpp)
+target_include_directories(invsqrt_static PUBLIC ${PROJECT_SOURCE_DIR}/include)
+
+# create executable
+add_executable(invsqrt src/main.cpp)
+target_link_libraries(invsqrt PRIVATE invsqrt_static)

Compile_ToolChains/03-static-libraries/include/invsqrt.h

@@ -0,0 +1,6 @@
+#ifndef INV_SQRT_H
+#define INV_SQRT_H
+
+float Q_rsqrt( float number );
+
+#endif // INV_SQRT_H

Compile_ToolChains/03-static-libraries/src/invsqrt.cpp

@@ -0,0 +1,16 @@
+#include "../include/invsqrt.h"
+
+float Q_rsqrt(float number)
+{
+    long i;
+    float x2, y;
+    const float threehalfs = 1.5F;
+
+    x2 = number * 0.5F;
+    y = number;
+    i = *(long *)&y;           // evil floating point bit level hacking
+    i = 0x5f3759df - (i >> 1); // what the fuck?
+    y = *(float *)&i;
+    y = y * (threehalfs - (x2 * y * y)); // 1st iteration
+    return y;
+}

Compile_ToolChains/03-static-libraries/src/main.cpp

@@ -0,0 +1,13 @@
+#include <iostream>
+#include "../include/invsqrt.h"
+
+int main()
+{
+    float x;
+    while(1)
+    {
+        std::cout << "input a number(press Ctrl+C to exit):";
+        std::cin >> x;
+        std::cout << Q_rsqrt(x) << std::endl;
+    }
+}