Add support for $ in fortran identifiers and clickable .i include files.

opengrok-indexer/src/main/java/org/opengrok/indexer/analysis/fortran/FortranAnalyzerFactory.java

@@ -49,7 +49,8 @@ public class FortranAnalyzerFactory extends FileAnalyzerFactory {
         "F95",
         "F03",
         "F08",
-        "F15"};
+        "F15",
+        "F77"};
 
     public FortranAnalyzerFactory() {
         super(null, null, SUFFIXES, null, null, "text/plain", AbstractAnalyzer.Genre.PLAIN, NAME, true);

opengrok-indexer/src/main/jflex/analysis/fortran/Fortran.lexh

@@ -22,7 +22,7 @@
  * Portions Copyright (c) 2017, Chris Fraire <cfraire@me.com>.
  */
 
-Identifier = [a-zA-Z_] [a-zA-Z0-9_]*
+Identifier = [a-zA-Z_] [a-zA-Z0-9_$]*
 Label = [0-9]+
 
 Number = ([0-9]+\.[0-9]+|[0-9][0-9]* | [0][xX] [0-9a-fA-F]+ )([uUdDlL]+)?

opengrok-indexer/src/main/jflex/analysis/fortran/FortranSymbolTokenizer.lex

@@ -52,11 +52,13 @@ import org.opengrok.indexer.analysis.JFlexSymbolMatcher;
                         return yystate(); }
               }
 
+{WhspChar}* "include" {WhspChar}* (\'[^\'\n\r]+\'| \"[^\"\n\r]+\")    {}
  {Number}        {}
 
  \"     { yybegin(STRING); }
  \'     { yybegin(QSTRING); }
  \!     { yybegin(SCOMMENT); }
+ "C"    { yybegin(SCOMMENT); }
 }
 
 <STRING> {

opengrok-indexer/src/main/jflex/analysis/fortran/FortranXref.lex

@@ -59,7 +59,7 @@ import org.opengrok.indexer.web.HtmlConsts;
     }
 %}
 
-File = [a-zA-Z]{FNameChar}* ".inc"
+File = [a-zA-Z]{FNameChar}* "." ("i"|"inc")
 
 %state  STRING SCOMMENT QSTRING LCOMMENT
 
@@ -86,13 +86,14 @@ File = [a-zA-Z]{FNameChar}* ".inc"
     onFilteredSymbolMatched(yytext(), yychar, Consts.kwd, false);
 }
 
+"'" ({File}|{FPath}) "'" |
 "<" ({File}|{FPath}) ">" {
     chkLOC();
-    onNonSymbolMatched("<", yychar);
-    String file = yytext();
-    file = file.substring(1, file.length() - 1);
+    String cmatch = yytext();
+    onNonSymbolMatched(cmatch.substring(0, 1), yychar);
+    String file = cmatch.substring(1, cmatch.length() - 1);
     onFilelikeMatched(file, yychar + 1);
-    onNonSymbolMatched(">", yychar + 1 + file.length());
+    onNonSymbolMatched(cmatch.substring(cmatch.length() - 1, 1), yychar + 1 + file.length());
 }
 
 /*{Hier}

opengrok-indexer/src/test/java/org/opengrok/indexer/analysis/fortran/FortranXrefTest.java

@@ -40,7 +40,7 @@ void sampleTest() throws IOException {
         writeAndCompare(new FortranAnalyzerFactory(),
                 "analysis/fortran/sample.f",
                 "analysis/fortran/sample_xref.html",
-                readTagsFromResource("analysis/fortran/sampletags"), 28);
+                readTagsFromResource("analysis/fortran/sampletags"), 32);
     }
 
     @Test

opengrok-indexer/src/test/resources/analysis/fortran/sample.f

@@ -227,4 +227,16 @@ SUBROUTINE DGESV( N, NRHS, A, LDA, IPIV, B, LDB, INFO )
 *     End of DGESV
 *
       END
+
+*  A Fortran 77 subroutine that ends in $
+*  =====================================================================
+      SUBROUTINE SUBF77$()
+*
+      INTEGER            VARF77$
+      VARF77$ = 0
+*
+*  =====================================================================
+*
+      CALL SUBF77$
+
       CALL 'http://example.com'

opengrok-indexer/src/test/resources/analysis/fortran/samplesymbols.txt

@@ -52,3 +52,7 @@ IPIV
 B
 LDB
 INFO
+SUBF77$
+VARF77$
+VARF77$
+SUBF77$

opengrok-indexer/src/test/resources/analysis/fortran/sampletags

@@ -1,16 +1,52 @@
+!_TAG_EXTRA_DESCRIPTION	anonymous	/Include tags for non-named objects like lambda/
+!_TAG_EXTRA_DESCRIPTION	fileScope	/Include tags of file scope/
+!_TAG_EXTRA_DESCRIPTION	pseudo	/Include pseudo tags/
+!_TAG_EXTRA_DESCRIPTION	subparser	/Include tags generated by subparsers/
+!_TAG_FIELD_DESCRIPTION	epoch	/the last modified time of the input file (only for F\/file kind tag)/
+!_TAG_FIELD_DESCRIPTION	file	/File-restricted scoping/
+!_TAG_FIELD_DESCRIPTION	input	/input file/
+!_TAG_FIELD_DESCRIPTION	name	/tag name/
+!_TAG_FIELD_DESCRIPTION	pattern	/pattern/
+!_TAG_FIELD_DESCRIPTION	typeref	/Type and name of a variable or typedef/
 !_TAG_FILE_FORMAT	2	/extended format; --format=1 will not append ;" to lines/
-!_TAG_FILE_SORTED	0	/0=unsorted, 1=sorted, 2=foldcase/
+!_TAG_FILE_SORTED	1	/0=unsorted, 1=sorted, 2=foldcase/
+!_TAG_KIND_DESCRIPTION!Fortran	E,enum	/enumerations/
+!_TAG_KIND_DESCRIPTION!Fortran	L,local	/local, common block, and namelist variables/
+!_TAG_KIND_DESCRIPTION!Fortran	M,method	/type bound procedures/
+!_TAG_KIND_DESCRIPTION!Fortran	N,enumerator	/enumeration values/
+!_TAG_KIND_DESCRIPTION!Fortran	S,submodule	/submodules/
+!_TAG_KIND_DESCRIPTION!Fortran	b,blockData	/block data/
+!_TAG_KIND_DESCRIPTION!Fortran	c,common	/common blocks/
+!_TAG_KIND_DESCRIPTION!Fortran	e,entry	/entry points/
+!_TAG_KIND_DESCRIPTION!Fortran	f,function	/functions/
+!_TAG_KIND_DESCRIPTION!Fortran	i,interface	/interface contents, generic names, and operators/
+!_TAG_KIND_DESCRIPTION!Fortran	k,component	/type and structure components/
+!_TAG_KIND_DESCRIPTION!Fortran	l,label	/labels/
+!_TAG_KIND_DESCRIPTION!Fortran	m,module	/modules/
+!_TAG_KIND_DESCRIPTION!Fortran	n,namelist	/namelists/
+!_TAG_KIND_DESCRIPTION!Fortran	p,program	/programs/
+!_TAG_KIND_DESCRIPTION!Fortran	s,subroutine	/subroutines/
+!_TAG_KIND_DESCRIPTION!Fortran	t,type	/derived types and structures/
+!_TAG_KIND_DESCRIPTION!Fortran	v,variable	/program (global) and module variables/
+!_TAG_OUTPUT_EXCMD	mixed	/number, pattern, mixed, or combineV2/
+!_TAG_OUTPUT_FILESEP	slash	/slash or backslash/
+!_TAG_OUTPUT_MODE	u-ctags	/u-ctags or e-ctags/
+!_TAG_OUTPUT_VERSION	0.0	/current.age/
+!_TAG_PARSER_VERSION!Fortran	1.1	/current.age/
+!_TAG_PATTERN_LENGTH_LIMIT	96	/0 for no limit/
+!_TAG_PROC_CWD	/home/navin.parakkal/OpenGrok/opengrok-indexer/src/test/resources/analysis/fortran/	//
 !_TAG_PROGRAM_AUTHOR	Universal Ctags Team	//
 !_TAG_PROGRAM_NAME	Universal Ctags	/Derived from Exuberant Ctags/
 !_TAG_PROGRAM_URL	https://ctags.io/	/official site/
-!_TAG_PROGRAM_VERSION	0.0.0	/b13cb551/
-!_TAG_OUTPUT_MODE	u-ctags	/u-ctags or e-ctags/
-DGESV	grok.f	/^      SUBROUTINE DGESV(/;"	subroutine	line:173	signature:(N, NRHS, A, LDA, IPIV, B, LDB, INFO)
-INFO	grok.f	/^      INTEGER            INFO,/;"	local	line:181	subroutine:DGESV
-LDA	grok.f	/^      INTEGER            INFO, LDA,/;"	local	line:181	subroutine:DGESV
-LDB	grok.f	/^      INTEGER            INFO, LDA, LDB,/;"	local	line:181	subroutine:DGESV
-N	grok.f	/^      INT/;"	local	line:181	subroutine:DGESV
-NRHS	grok.f	/^      INTEGER            INFO, LDA, LDB, N, NRHS$/;"	local	line:181	subroutine:DGESV
-IPIV	grok.f	/^      INTEGER            IPIV(/;"	local	line:184	subroutine:DGESV
-A	grok.f	/^      DOUBLE PRECISION   A(/;"	local	line:185	subroutine:DGESV
-B	grok.f	/^      DOUBL/;"	local	line:185	subroutine:DGESV
+!_TAG_PROGRAM_VERSION	6.1.0	/p6.1.20240714.0/
+A	sample.f	/^      DOUBLE PRECISION   A( LDA,/;"	L	subroutine:DGESV	file:
+B	sample.f	/^      DOUBLE PRECISION   A( LDA, * ), B( LDB,/;"	L	subroutine:DGESV	file:
+DGESV	sample.f	/^      SUBROUTINE DGESV(/;"	s
+INFO	sample.f	/^      INTEGER            INFO,/;"	L	subroutine:DGESV	file:
+IPIV	sample.f	/^      INTEGER            IPIV(/;"	L	subroutine:DGESV	file:
+LDA	sample.f	/^      INTEGER            INFO, LDA,/;"	L	subroutine:DGESV	file:
+LDB	sample.f	/^      INTEGER            INFO, LDA, LDB,/;"	L	subroutine:DGESV	file:
+N	sample.f	/^      INTEGER            INFO, LDA, LDB, N, NR/;"	L	subroutine:DGESV	file:
+NRHS	sample.f	/^      INTEGER            INFO, LDA, LDB, N, NRHS$/;"	L	subroutine:DGESV	file:
+SUBF77$	sample.f	/^      SUBROUTINE SUBF77$(/;"	s
+VARF77$	sample.f	/^      INTEGER            VARF77\$$/;"	L	subroutine:SUBF77$	file: