From b1d513b2ac65fe26ceec2fa494867713efa01cd5 Mon Sep 17 00:00:00 2001
From: albert-github <albert.tests@gmail.com>
Date: Sun, 26 Jan 2014 21:06:45 +0100
Subject: Add line numbers in case comment is not closed properly.

This bug fix is an extension to the bug fix:  Add warning when encountering a nested comment start (/*) without matching end (*/).
It is quite hard to find the place in the source file where the problem occurs. This bug fix helps to locate part of the problems, it is not perfect it only gives the starting comment tags that give a problem (other problems also occur e.g. when // is followed by */).
---
 src/commentcnv.l | 41 ++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 40 insertions(+), 1 deletion(-)

diff --git a/src/commentcnv.l b/src/commentcnv.l
index 6433974..b12623c 100644
--- a/src/commentcnv.l
+++ b/src/commentcnv.l
@@ -52,6 +52,13 @@ struct CondCtx
   bool skip;
 };
   
+struct CommentCtx
+{
+  CommentCtx(int line) 
+    : lineNr(line) {}
+  int lineNr;
+};
+  
 static BufStr * g_inBuf;
 static BufStr * g_outBuf;
 static int      g_inBufPos;
@@ -64,6 +71,7 @@ static QCString g_fileName;
 static int      g_lineNr;
 static int      g_condCtx;
 static QStack<CondCtx> g_condStack;
+static QStack<CommentCtx> g_commentStack;
 static QCString g_blockName;
 static int      g_lastCommentContext;
 static bool     g_inSpecialComment;
@@ -256,8 +264,10 @@ void replaceComment(int offset);
 				     {
                                        g_pythonDocString = TRUE;
                                        g_nestingCount=0;
+                                       g_commentStack.clear(); /*  to be on the save side */
                                        copyToOutput(yytext,(int)yyleng);
 				       BEGIN(CComment);
+                                       g_commentStack.push(new CommentCtx(g_lineNr));
 				     }
                                    }
 <Scan>![><!]/.*\n	   {
@@ -269,7 +279,9 @@ void replaceComment(int offset);
 				     {
                                        copyToOutput(yytext,(int)yyleng); 
                                        g_nestingCount=0;
+                                       g_commentStack.clear(); /*  to be on the save side */
 				       BEGIN(CComment);
+                                       g_commentStack.push(new CommentCtx(g_lineNr));
 				     }
   				   }
 <Scan>[Cc\*][><!]/.*\n	   {
@@ -284,7 +296,9 @@ void replaceComment(int offset);
                                        {
                                          copyToOutput(yytext,(int)yyleng); 
                                          g_nestingCount=0;
+                                         g_commentStack.clear(); /*  to be on the save side */
 				         BEGIN(CComment);
+                                         g_commentStack.push(new CommentCtx(g_lineNr));
 				       }
 				       else
 				       {
@@ -378,8 +392,10 @@ void replaceComment(int offset);
 <Scan>"/*"[*!]?			   { /* start of a C comment */
   			             g_specialComment=(int)yyleng==3;
                                      g_nestingCount=0;
+                                     g_commentStack.clear(); /*  to be on the save side */
                                      copyToOutput(yytext,(int)yyleng); 
 				     BEGIN(CComment); 
+                                     g_commentStack.push(new CommentCtx(g_lineNr));
                                    }
 <Scan>"#"("#")?		           {
                                      if (g_lang!=SrcLangExt_Python)
@@ -390,7 +406,9 @@ void replaceComment(int offset);
 				     {
                                        copyToOutput(yytext,(int)yyleng); 
                                        g_nestingCount=0;
+                                       g_commentStack.clear(); /*  to be on the save side */
 				       BEGIN(CComment);
+                                       g_commentStack.push(new CommentCtx(g_lineNr));
 				     }
   				   }
 <Scan>"--!"		           {
@@ -402,7 +420,9 @@ void replaceComment(int offset);
 				     {
                                        copyToOutput(yytext,(int)yyleng); 
                                        g_nestingCount=0;
+                                       g_commentStack.clear(); /*  to be on the save side */
 				       BEGIN(CComment);
+                                       g_commentStack.push(new CommentCtx(g_lineNr));
 				     }
   				   }
 <Scan>![><!]		           {
@@ -414,7 +434,9 @@ void replaceComment(int offset);
 				     {
                                        copyToOutput(yytext,(int)yyleng); 
                                        g_nestingCount=0;
+                                       g_commentStack.clear(); /*  to be on the save side */
 				       BEGIN(CComment);
+                                       g_commentStack.push(new CommentCtx(g_lineNr));
 				     }
   				   }
 <CComment>"{@code"/[ \t\n]	   {
@@ -606,6 +628,7 @@ void replaceComment(int offset);
                                    }
 <CComment>"/"+"*"                  { /* nested C comment */
                                      g_nestingCount++;
+                                     g_commentStack.push(new CommentCtx(g_lineNr));
                                      copyToOutput(yytext,(int)yyleng); 
                                    }
 <CComment>"*"+"/"                  { /* end of C comment */
@@ -623,6 +646,7 @@ void replaceComment(int offset);
                                        else
                                        {
                                          g_nestingCount--;
+                                         CommentCtx *ctx = g_commentStack.pop();
                                        }
 				     }
                                    }
@@ -951,6 +975,8 @@ void convertCppComments(BufStr *inBuf,BufStr *outBuf,const char *fileName)
   g_lineNr   = 1;
   g_condStack.clear();
   g_condStack.setAutoDelete(TRUE);
+  g_commentStack.clear();
+  g_commentStack.setAutoDelete(TRUE);
 
   printlex(yy_flex_debug, TRUE, __FILE__, fileName);
   isFixedForm = FALSE;
@@ -962,7 +988,9 @@ void convertCppComments(BufStr *inBuf,BufStr *outBuf,const char *fileName)
   if (g_lang==SrcLangExt_Markdown)
   {
     g_nestingCount=0;
+    g_commentStack.clear(); /*  to be on the save side */
     BEGIN(CComment);
+    g_commentStack.push(new CommentCtx(g_lineNr));
   }
   else
   {
@@ -979,9 +1007,20 @@ void convertCppComments(BufStr *inBuf,BufStr *outBuf,const char *fileName)
   }
   if (g_nestingCount>0 || (YY_START==CComment && g_lang!=SrcLangExt_Markdown))
   {
+    QString tmp= "(probable line reference: ";
+    bool first = TRUE;
+    while (!g_commentStack.isEmpty())
+    {
+      CommentCtx *ctx = g_commentStack.pop();
+      if (!first) tmp += ", ";
+      tmp += QString::number(ctx->lineNr);
+      first = FALSE;
+    }
+    tmp += ")";
     warn(g_fileName,g_lineNr,"Reached end of file while still inside a (nested) comment. "
-        "Nesting level %d",g_nestingCount+1); // add one for "normal" expected end of comment
+        "Nesting level %d %s",g_nestingCount+1,tmp.data()); // add one for "normal" expected end of comment
   }
+  g_commentStack.clear();
   if (Debug::isFlagSet(Debug::CommentCnv))
   {
     g_outBuf->at(g_outBuf->curPos())='\0';
-- 
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