Apply clang-format via 'make format'. Use 'git diff -b' if comparing. No functional change.

.clang-format

@@ -0,0 +1,106 @@
+---
+Language:        Cpp
+# BasedOnStyle:  LLVM
+AccessModifierOffset: -3
+AlignAfterOpenBracket: Align
+AlignConsecutiveAssignments: false
+AlignConsecutiveDeclarations: false
+AlignEscapedNewlines: DontAlign
+AlignOperands:   true
+AlignTrailingComments: false
+AllowAllParametersOfDeclarationOnNextLine: true
+AllowShortBlocksOnASingleLine: true
+AllowShortCaseLabelsOnASingleLine: true
+AllowShortFunctionsOnASingleLine: All
+AllowShortIfStatementsOnASingleLine: true
+AllowShortLoopsOnASingleLine: true
+AlwaysBreakAfterDefinitionReturnType: None
+AlwaysBreakAfterReturnType: None
+AlwaysBreakBeforeMultilineStrings: false
+AlwaysBreakTemplateDeclarations: true
+BinPackArguments: true
+BinPackParameters: true
+BraceWrapping:
+  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: All
+BreakBeforeBraces: Attach
+BreakBeforeInheritanceComma: false
+BreakBeforeTernaryOperators: true
+BreakConstructorInitializersBeforeComma: false
+BreakConstructorInitializers: BeforeComma
+BreakAfterJavaFieldAnnotations: false
+BreakStringLiterals: true
+ColumnLimit:     99
+CommentPragmas:  '^ IWYU pragma:'
+CompactNamespaces: false
+ConstructorInitializerAllOnOneLineOrOnePerLine: false
+ConstructorInitializerIndentWidth: 3
+ContinuationIndentWidth: 3
+Cpp11BracedListStyle: true
+DerivePointerAlignment: false
+DisableFormat:   false
+ExperimentalAutoDetectBinPacking: false
+FixNamespaceComments: true
+ForEachMacros:
+  - Q_FOREACH
+  - BOOST_FOREACH
+
+# Include grouping/sorting
+SortIncludes:    false
+
+IndentCaseLabels: false
+IndentPPDirectives: None
+IndentWidth:     3
+IndentWrappedFunctionNames: false
+JavaScriptQuotes: Leave
+JavaScriptWrapImports: true
+KeepEmptyLinesAtTheStartOfBlocks: true
+MacroBlockBegin: ''
+MacroBlockEnd:   ''
+MaxEmptyLinesToKeep: 1
+NamespaceIndentation: None
+ObjCBlockIndentWidth: 2
+ObjCSpaceAfterProperty: false
+ObjCSpaceBeforeProtocolList: true
+PenaltyBreakAssignment: 2
+PenaltyBreakBeforeFirstCallParameter: 19
+PenaltyBreakComment: 300
+PenaltyBreakFirstLessLess: 120
+PenaltyBreakString: 1000
+PenaltyExcessCharacter: 1000000
+PenaltyReturnTypeOnItsOwnLine: 60
+PointerAlignment: Left
+ReflowComments:  true
+SortUsingDeclarations: true
+SpaceAfterCStyleCast: false
+SpaceAfterTemplateKeyword: true
+SpaceBeforeAssignmentOperators: true
+SpaceBeforeParens: ControlStatements
+SpaceInEmptyParentheses: false
+SpacesBeforeTrailingComments: 2
+SpacesInAngles:  false
+SpacesInContainerLiterals: true
+SpacesInCStyleCastParentheses: false
+SpacesInLineCommentPrefix:
+  Minimum: 0
+  Maximum: -1
+SpacesInParentheses: false
+SpacesInSquareBrackets: false
+Standard:        Cpp11
+TabWidth:        8
+UseTab:          Never
+...

Makefile

@@ -4,6 +4,8 @@ CFLAGS= $(ARCHFLGS) $(OPTFLGS) -O2
 #CFLAGS= $(ARCHFLGS) -pipe $(OPTFLGS) -g -Wall
 #CFLAGS= -pg -g -Wall
 #CFLAGS= -g -Wall
+CLANGFORMAT = clang-format-14
+CLANGFORMAT_FLAGS = -i
 
 CC = gcc
 LIBS = -lm
@@ -13,7 +15,7 @@ default: README vcddiff
 
 vcddiff:	vcddiff.o
 	$(CC) $(CFLAGS) $(OPTFLGS) vcddiff.o $(LIBS) -o vcddiff
-	@echo "** Now copy ./vcddiff to your binary directory, e.g. 'cp -p vcddiff /usr/local/bin/vcddiff'"
+	@echo "** Now copy ./vcddiff to your binary directory, e.g. 'sudo cp -p vcddiff /usr/local/bin/vcddiff'"
 
 vcddiff.o:	vcddiff.c vcddiff.h
 	$(CC) $(CFLAGS) -c vcddiff.c
@@ -24,3 +26,6 @@ README: README.pod
 
 clean distclean:
 	-rm -rf README vcddiff vcddiff.o
+
+format:
+	$(CLANGFORMAT) $(CLANGFORMAT_FLAGS) *.c *.h

vcddiff.h

@@ -20,7 +20,7 @@
 #define FALSE 0
 #define MAXSIG 256
 #define MAXSCOPES 100
-#define MAXTOKSIZE (1024*1024 + 1024)
+#define MAXTOKSIZE (1024 * 1024 + 1024)
 
 #define EDGE_PER_LINE 11
 #define CHAR_PER_EDGE 5
@@ -59,38 +59,37 @@
 
 #define UNDEFINED 26
 
-
 /*dumpfile key words*/
 #define V_ATTRBEGIN 1
 #define V_COMMENT 2
 #define V_DATE 3
-#define V_END  4
-#define V_ENDDEF  5
-#define V_SCOPE    6
+#define V_END 4
+#define V_ENDDEF 5
+#define V_SCOPE 6
 #define V_TIMESCALE 7
-#define V_UPSCOPE  8
-#define V_VAR    9
-#define V_VERSION  10
+#define V_UPSCOPE 8
+#define V_VAR 9
+#define V_VERSION 10
 
-#  define MAX(a,b) ((a  > b ) ?  a  :  b )
+#define MAX(a, b) ((a > b) ? a : b)
 
 typedef unsigned long long vtime_t;
 typedef char bool_t;
 
 struct variable_types_t {
-         char *vnam;
-         int vnum;
+   char* vnam;
+   int vnum;
 };
 
 struct signal_t {
-    int size;
-    int type;
-    unsigned int sig_code;
-    char state;
-    char *vector;
-    char *signame;
-    char *ident;
-    bool_t found;
-    bool_t in_both;
-    struct signal_t *next;
+   int size;
+   int type;
+   unsigned int sig_code;
+   char state;
+   char* vector;
+   char* signame;
+   char* ident;
+   bool_t found;
+   bool_t in_both;
+   struct signal_t* next;
 };