[PATCH] handling gcc attributes

The following patch allows doxygen to process C code which contains GCC 
attributes.
http://gcc.gnu.org/onlinedocs/gcc-4.0.2/gcc/Attribute-Syntax.html#Attribute-Syntax

Symptom: Doxygen gets confused when trying to process C code that 
contains attributes, it usually throws off the parser causing 
everything from the start of the first attribute to the end of the file 
to be mis-processed.

Cause: The scanner doesn't know to look for attributes.

Index: doxygen-1.4.6/src/scanner.l
===================================================================
--- doxygen-1.4.6/src/scanner.l	2005-12-27 13:04:40.000000000 -0500
+++ doxygen-1.4.6-tlw/src/scanner.l	2006-01-14 07:51:22.210391347 -0500
@@ -1195,7 +1195,7 @@
 					  }
   					}
 <FindMembers>{B}*(("typedef"{BN}+)?)("volatile"{BN}+)?"struct{" | 
-<FindMembers>{B}*(("typedef"{BN}+)?)("volatile"{BN}+)?"struct"/{BN}+ { 
+<FindMembers>{B}*(("typedef"{BN}+)?)
("volatile"{BN}+)?"struct"({BN}+"__attribute__"{BN}*"((".*"))")?/{BN}+ 
{ 
 					  isTypedef=((QCString)yytext).find("typedef")!=-1;
   					  current->section = Entry::STRUCT_SEC ;
 					  addType( current ) ;
@@ -1233,6 +1233,8 @@
 					  if (yytext[yyleng-1]=='{') unput('{');
 					  BEGIN( CompoundName ) ;
 					}
+<FindMembers>"__attribute__"{BN}+"((".*"))"{BN}+ {
+					}
 <Operator>"("{BN}*")"({BN}*"<"[^>]*">"){BN}*/"("  {  // 
A::operator()<int>(int arg)
   					  lineCount();
 					  current->name += "()";
@@ -1874,7 +1876,8 @@
 <FindMembers,FindFields,ReadInitializer>"//"([!/]?)
{B}*{CMD}"}".*|"/*"([!*]?){B}*{CMD}"}".*"*/"	{
   					  closeGroup(current,yyFileName,yyLineNr);
   					}
-<FindMembers>"="			{
+<FindMembers>"=" |
+<FindMember>({BN}+"__attribute__"{BN}*"((".*"))"{BN}+)?"=" {
   					  current->bodyLine = yyLineNr;
 					  lastInitializerContext = YY_START;
 					  initBracketCount=0;
@@ -2202,7 +2205,9 @@
 					    BEGIN( Array ) ;
 					  }
 					}
-<Array>"]"				{ current->args += *yytext ;
+<Array>"]" |
+<Array>"]"({BN}+"__attribute__"{BN}*"((".*"))")? {
+					  current->args += *yytext ;
 					  if (--squareCount<=0)
 	                                     BEGIN( FindMembers ) ;
 					}
@@ -2211,7 +2216,8 @@
 					}
 <Array>.				{ current->args += *yytext ; }
 <SkipSquare>"["				{ squareCount++; }
-<SkipSquare>"]"				{
+<SkipSquare>"]"	|
+<SkipSquare>"]"({BN}+"__attribute__"{BN}*"((".*"))")? {
   					  if (--squareCount<=0)
 					    BEGIN( lastSquareContext );
   					}
@@ -2238,7 +2244,7 @@
 <FindFields>{ID}			{
   					  current->name = yytext;
 					}
-<FindFields>"="				{
+<FindFields>({BN}*"__attribute__"{BN}*"((".*"))"{BN}*)?"=" {
   					  lastInitializerContext = YY_START;
 					  initBracketCount=0;
   					  BEGIN(ReadInitializer);
@@ -2443,7 +2449,7 @@
 					  unput(';');
 					  BEGIN( MemberSpec ) ;
   					}
-<MemberSpec>([*&]*{BN}*)*{ID}{BN}*("["[^\]\n]*"]")* { // the [] part 
could be improved.
+<MemberSpec>([*&]*{BN}*)*{ID}
{BN}*("["[^\]\n]*"]")*({BN}*"__attribute__"{BN}*"((".*"))")? { // the 
[] part could be improved.
   					  lineCount();
   					  int i=0,l=yyleng,j;
 					  while (i<l && (!isId(yytext[i]))) i++;
@@ -2574,7 +2580,7 @@
 					    BEGIN( FindMembers );
 					  }
   					}
-<MemberSpec>"="				{ 
+<MemberSpec>({BN}*"__attribute__"{BN}*"((".*"))"{BN}*)?"=" { 
   					  lastInitializerContext=YY_START;
 					  initBracketCount=0;
   					  BEGIN(ReadInitializer);


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